├── .gitignore ├── tests ├── sample │ ├── eslint.config.mjs │ ├── app │ │ ├── admin-books │ │ │ ├── webapp │ │ │ │ ├── i18n │ │ │ │ │ ├── i18n.properties │ │ │ │ │ ├── i18n_en.properties │ │ │ │ │ └── i18n_de.properties │ │ │ │ ├── Component.js │ │ │ │ └── manifest.json │ │ │ └── fiori-service.cds │ │ ├── browse │ │ │ ├── webapp │ │ │ │ ├── i18n │ │ │ │ │ ├── i18n_de.properties │ │ │ │ │ ├── i18n.properties │ │ │ │ │ └── i18n_en.properties │ │ │ │ ├── Component.js │ │ │ │ └── manifest.json │ │ │ └── fiori-service.cds │ │ ├── services.cds │ │ ├── _i18n │ │ │ ├── i18n.properties │ │ │ └── i18n_de.properties │ │ ├── index.html │ │ ├── appconfig │ │ │ └── fioriSandboxConfig.json │ │ └── common.cds │ ├── srv │ │ ├── admin-service.cds │ │ ├── admin-service.js │ │ ├── cat-service.cds │ │ └── cat-service.js │ ├── db │ │ ├── data │ │ │ ├── sap.capire.bookshop-Genres.csv │ │ │ ├── sap.capire.bookshop-Authors.csv │ │ │ ├── sap.capire.bookshop-Books_texts.csv │ │ │ └── sap.capire.bookshop-Books.csv │ │ └── schema.cds │ ├── package.json │ └── README.md ├── cli.test.js ├── integration.test.js ├── tools.test.js ├── searchMarkdownDocs.test.js ├── loadEmbeddings.test.js ├── embeddings.test.js └── compare-calculateEmbeddings-huggingface.test.js ├── eslint.config.mjs ├── index.js ├── CHANGELOG.md ├── .github ├── dependabot.yml └── workflows │ ├── ci.yml │ ├── _release.yml │ └── release.yml ├── package.json ├── lib ├── fuzzyTopN.js ├── run.js ├── tools.js ├── searchMarkdownDocs.js ├── embeddings.js ├── getModel.js └── calculateEmbeddings.js ├── REUSE.toml ├── CONTRIBUTING.md ├── README.md ├── LICENSES └── Apache-2.0.txt └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | models/ 2 | embeddings/ 3 | node_modules/ 4 | -------------------------------------------------------------------------------- /tests/sample/eslint.config.mjs: -------------------------------------------------------------------------------- 1 | import cds from '@sap/cds/eslint.config.mjs' 2 | export default [...cds.recommended] 3 | -------------------------------------------------------------------------------- /eslint.config.mjs: -------------------------------------------------------------------------------- 1 | import cds from '@sap/cds/eslint.config.mjs' 2 | export default [ 3 | ...cds.recommended, 4 | { 5 | ignores: ['scripts/'] 6 | } 7 | ] 8 | -------------------------------------------------------------------------------- /tests/sample/app/admin-books/webapp/i18n/i18n.properties: -------------------------------------------------------------------------------- 1 | appTitle=Manage Books 2 | appSubTitle=Manage bookshop inventory 3 | appDescription=Manage your bookshop inventory with ease. 4 | -------------------------------------------------------------------------------- /tests/sample/app/admin-books/webapp/i18n/i18n_en.properties: -------------------------------------------------------------------------------- 1 | appTitle=Manage Books 2 | appSubTitle=Manage bookshop inventory 3 | appDescription=Manage your bookshop inventory with ease. 4 | -------------------------------------------------------------------------------- /tests/sample/app/browse/webapp/i18n/i18n_de.properties: -------------------------------------------------------------------------------- 1 | appTitle=Bücher anschauen 2 | appSubTitle=Finden sie ihre nächste Lektüre 3 | appDescription=Finden Sie die nachsten Bücher, die Sie lesen möchten. 4 | -------------------------------------------------------------------------------- /tests/sample/app/services.cds: -------------------------------------------------------------------------------- 1 | /* 2 | This model controls what gets served to Fiori frontends... 3 | */ 4 | using from './common'; 5 | using from './browse/fiori-service'; 6 | using from './admin-books/fiori-service'; 7 | -------------------------------------------------------------------------------- /tests/sample/app/admin-books/webapp/i18n/i18n_de.properties: -------------------------------------------------------------------------------- 1 | appTitle=Bücher verwalten 2 | appSubTitle=Verwalten Sie den Bestand der Buchhandlung 3 | appDescription=Verwalten Sie den Bestand Ihrer Buchhandlung ganz einfach. 4 | -------------------------------------------------------------------------------- /tests/sample/app/browse/webapp/i18n/i18n.properties: -------------------------------------------------------------------------------- 1 | appTitle=Browse Books 2 | appSubTitle=All books in one place 3 | appDescription=This application lets you find the next books you want to read. 4 | appInfo=Find your favorite books 5 | -------------------------------------------------------------------------------- /tests/sample/app/browse/webapp/i18n/i18n_en.properties: -------------------------------------------------------------------------------- 1 | appTitle=Browse Books 2 | appSubTitle=All books in one place 3 | appDescription=This application lets you find the next books you want to read. 4 | appInfo=Find your favorite books 5 | -------------------------------------------------------------------------------- /tests/sample/srv/admin-service.cds: -------------------------------------------------------------------------------- 1 | using { sap.capire.bookshop as my } from '../db/schema'; 2 | service AdminService @(requires:'admin') { 3 | entity Books as projection on my.Books; 4 | entity Authors as projection on my.Authors; 5 | } 6 | -------------------------------------------------------------------------------- /tests/sample/app/browse/webapp/Component.js: -------------------------------------------------------------------------------- 1 | sap.ui.define(['sap/fe/core/AppComponent'], function (AppComponent) { 2 | 'use strict' 3 | return AppComponent.extend('bookshop.Component', { 4 | metadata: { manifest: 'json' } 5 | }) 6 | }) 7 | /* eslint no-undef:0 */ 8 | -------------------------------------------------------------------------------- /tests/sample/app/admin-books/webapp/Component.js: -------------------------------------------------------------------------------- 1 | sap.ui.define(['sap/fe/core/AppComponent'], function (AppComponent) { 2 | 'use strict' 3 | return AppComponent.extend('books.Component', { 4 | metadata: { manifest: 'json' } 5 | }) 6 | }) 7 | 8 | /* eslint no-undef:0 */ 9 | -------------------------------------------------------------------------------- /tests/sample/app/_i18n/i18n.properties: -------------------------------------------------------------------------------- 1 | Books = Books 2 | Book = Book 3 | ID = ID 4 | Title = Title 5 | Author = Author 6 | Authors = Authors 7 | AuthorID = Author ID 8 | AuthorName = Author Name 9 | Name = Name 10 | Age = Age 11 | Stock = Stock 12 | Order = Order 13 | Orders = Orders 14 | Price = Price 15 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env node 2 | 3 | import run, { runTool } from './lib/run.js' 4 | 5 | const args = process.argv.slice(2) 6 | 7 | if (args.length > 0 && !args[0].startsWith('-')) { 8 | const toolName = args[0] 9 | const toolArgs = args.slice(1) 10 | runTool(toolName, ...toolArgs) 11 | } else { 12 | run() 13 | } 14 | -------------------------------------------------------------------------------- /tests/sample/app/_i18n/i18n_de.properties: -------------------------------------------------------------------------------- 1 | Books = Bücher 2 | Book = Buch 3 | ID = ID 4 | Title = Titel 5 | Author = Autor 6 | Authors = Autoren 7 | AuthorID = ID des Autors 8 | AuthorName = Name des Autors 9 | Name = Name 10 | Age = Alter 11 | Stock = Bestand 12 | Order = Bestellung 13 | Orders = Bestellungen 14 | Price = Preis 15 | -------------------------------------------------------------------------------- /tests/sample/db/data/sap.capire.bookshop-Genres.csv: -------------------------------------------------------------------------------- 1 | ID,parent_ID,name 2 | 10,,Fiction 3 | 11,10,Drama 4 | 12,10,Poetry 5 | 13,10,Fantasy 6 | 14,10,Science Fiction 7 | 15,10,Romance 8 | 16,10,Mystery 9 | 17,10,Thriller 10 | 18,10,Dystopia 11 | 19,10,Fairy Tale 12 | 20,,Non-Fiction 13 | 21,20,Biography 14 | 22,21,Autobiography 15 | 23,20,Essay 16 | 24,20,Speech 17 | -------------------------------------------------------------------------------- /tests/sample/db/data/sap.capire.bookshop-Authors.csv: -------------------------------------------------------------------------------- 1 | ID,name,dateOfBirth,placeOfBirth,dateOfDeath,placeOfDeath 2 | 101,Emily Brontë,1818-07-30,"Thornton, Yorkshire",1848-12-19,"Haworth, Yorkshire" 3 | 107,Charlotte Brontë,1818-04-21,"Thornton, Yorkshire",1855-03-31,"Haworth, Yorkshire" 4 | 150,Edgar Allen Poe,1809-01-19,"Boston, Massachusetts",1849-10-07,"Baltimore, Maryland" 5 | 170,Richard Carpenter,1929-08-14,"King’s Lynn, Norfolk",2012-02-26,"Hertfordshire, England" 6 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Change Log 2 | 3 | All notable changes to this project will be documented in this file. 4 | This project adheres to [Semantic Versioning](http://semver.org/). 5 | The format is based on [Keep a Changelog](http://keepachangelog.com/). 6 | 7 | ## Version 0.0.3 - 2025-09-22 8 | 9 | ### Changed 10 | 11 | - Slightly different rules to search docs when using `cds` CLI 12 | 13 | ## Version 0.0.2 - 2025-09-04 14 | 15 | ### Fixed 16 | 17 | - Recompilation after compilation of an empty project 18 | 19 | ## Version 0.0.1 - 2025-09-03 20 | 21 | ### Added 22 | 23 | - Initial release 24 | -------------------------------------------------------------------------------- /tests/sample/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "sample", 3 | "version": "1.0.0", 4 | "description": "A simple CAP project.", 5 | "repository": "", 6 | "license": "UNLICENSED", 7 | "private": true, 8 | "dependencies": { 9 | "@sap/cds": "^9", 10 | "express": "^4" 11 | }, 12 | "engines": { 13 | "node": ">=20" 14 | }, 15 | "devDependencies": { 16 | "@cap-js/sqlite": "^2", 17 | "@cap-js/cds-types": "^0.10.0" 18 | }, 19 | "scripts": { 20 | "start": "cds-serve" 21 | }, 22 | "sapux": [ 23 | "app/admin-books", 24 | "app/browse" 25 | ] 26 | } 27 | -------------------------------------------------------------------------------- /tests/sample/srv/admin-service.js: -------------------------------------------------------------------------------- 1 | const cds = require('@sap/cds') 2 | 3 | module.exports = class AdminService extends cds.ApplicationService { 4 | init() { 5 | const { Books } = this.entities 6 | 7 | /** 8 | * Generate IDs for new Books drafts 9 | */ 10 | this.before('NEW', Books.drafts, async req => { 11 | if (req.data.ID) return 12 | const { ID: id1 } = await SELECT.one.from(Books).columns('max(ID) as ID') 13 | const { ID: id2 } = await SELECT.one.from(Books.drafts).columns('max(ID) as ID') 14 | req.data.ID = Math.max(id1 || 0, id2 || 0) + 1 15 | }) 16 | return super.init() 17 | } 18 | } 19 | -------------------------------------------------------------------------------- /tests/sample/srv/cat-service.cds: -------------------------------------------------------------------------------- 1 | using { sap.capire.bookshop as my } from '../db/schema'; 2 | service CatalogService { 3 | 4 | /** For displaying lists of Books */ 5 | @readonly entity ListOfBooks as projection on Books 6 | excluding { descr }; 7 | 8 | /** For display in details pages */ 9 | @readonly entity Books as projection on my.Books { *, 10 | author.name as author 11 | } excluding { createdBy, modifiedBy }; 12 | 13 | @requires: 'authenticated-user' 14 | action submitOrder ( 15 | book : Books:ID @mandatory, 16 | quantity: Integer @mandatory 17 | ) returns { stock: Integer }; 18 | 19 | event OrderedBook : { book: Books:ID; quantity: Integer; buyer: String }; 20 | } 21 | -------------------------------------------------------------------------------- /.github/dependabot.yml: -------------------------------------------------------------------------------- 1 | # To get started with Dependabot version updates, you'll need to specify which 2 | # package ecosystems to update and where the package manifests are located. 3 | # Please see the documentation for all configuration options: 4 | # https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file 5 | 6 | version: 2 7 | updates: 8 | - package-ecosystem: npm 9 | directory: / 10 | versioning-strategy: increase-if-necessary 11 | schedule: 12 | interval: 'weekly' 13 | groups: 14 | production-dependencies: 15 | dependency-type: 'production' 16 | development-dependencies: 17 | dependency-type: 'development' 18 | -------------------------------------------------------------------------------- /tests/sample/README.md: -------------------------------------------------------------------------------- 1 | # Getting Started 2 | 3 | Welcome to your new project. 4 | 5 | It contains these folders and files, following our recommended project layout: 6 | 7 | | File or Folder | Purpose | 8 | | -------------- | ------------------------------------ | 9 | | `app/` | content for UI frontends goes here | 10 | | `db/` | your domain models and data go here | 11 | | `srv/` | your service models and code go here | 12 | | `package.json` | project metadata and configuration | 13 | | `readme.md` | this getting started guide | 14 | 15 | ## Next Steps 16 | 17 | - Open a new terminal and run `cds watch` 18 | - (in VS Code simply choose _**Terminal** > Run Task > cds watch_) 19 | - Start adding content, for example, a [db/schema.cds](db/schema.cds). 20 | 21 | ## Learn More 22 | 23 | Learn more at https://cap.cloud.sap/docs/get-started/. 24 | -------------------------------------------------------------------------------- /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: CI 2 | 3 | permissions: 4 | contents: read 5 | 6 | on: 7 | workflow_dispatch: 8 | push: 9 | branches: [main] 10 | pull_request: 11 | branches: [main] 12 | 13 | jobs: 14 | lint: 15 | runs-on: ubuntu-latest 16 | steps: 17 | - uses: actions/checkout@v2 18 | - name: Use Node.js 22.x 19 | uses: actions/setup-node@v2 20 | with: 21 | node-version: 22.x 22 | - run: npm ci 23 | - run: npm run lint 24 | test: 25 | runs-on: ubuntu-latest 26 | strategy: 27 | fail-fast: false 28 | matrix: 29 | node-version: [22.x, 20.x] 30 | steps: 31 | - uses: actions/checkout@v2 32 | - name: Use Node.js ${{ matrix.node-version }} 33 | uses: actions/setup-node@v2 34 | with: 35 | node-version: ${{ matrix.node-version }} 36 | - run: npm i 37 | - run: npm run test 38 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "@cap-js/mcp-server", 3 | "version": "0.0.3", 4 | "description": "Model Context Protocol (MCP) server for AI-assisted development of CAP applications.", 5 | "repository": { 6 | "type": "git", 7 | "url": "git+https://github.com/cap-js/mcp-server.git" 8 | }, 9 | "author": "SAP SE (https://www.sap.com)", 10 | "homepage": "https://cap.cloud.sap/", 11 | "license": "Apache-2.0", 12 | "type": "module", 13 | "files": [ 14 | "lib/", 15 | "index.js" 16 | ], 17 | "bin": { 18 | "cds-mcp": "./index.js" 19 | }, 20 | "scripts": { 21 | "test": "node --test --test-concurrency=1", 22 | "lint": "npx eslint ." 23 | }, 24 | "dependencies": { 25 | "@modelcontextprotocol/sdk": "^1.8.0", 26 | "@sap/cds": "^9", 27 | "onnxruntime-web": "^1.22.0" 28 | }, 29 | "devDependencies": { 30 | "@huggingface/transformers": "^3.7.1", 31 | "prettier": "*" 32 | } 33 | } 34 | -------------------------------------------------------------------------------- /.github/workflows/_release.yml: -------------------------------------------------------------------------------- 1 | # This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node 2 | # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs 3 | 4 | name: Release 5 | 6 | on: 7 | # push: 8 | # branches: main 9 | 10 | workflow_dispatch: 11 | inputs: 12 | dry-run: 13 | description: Dry run 14 | required: false 15 | default: false 16 | type: boolean 17 | 18 | permissions: 19 | contents: write 20 | id-token: write 21 | 22 | concurrency: 23 | group: ${{ github.workflow }}-${{ github.ref }} 24 | cancel-in-progress: true 25 | 26 | jobs: 27 | release: 28 | uses: cap-js/.github/.github/workflows/release.yml@main 29 | secrets: inherit 30 | with: 31 | dry-run: ${{ fromJSON(github.event.inputs.dry-run || 'false') }} 32 | -------------------------------------------------------------------------------- /tests/sample/db/schema.cds: -------------------------------------------------------------------------------- 1 | using { Currency, managed, sap } from '@sap/cds/common'; 2 | namespace sap.capire.bookshop; 3 | 4 | @odata.draft.enabled 5 | entity Books : managed { 6 | key ID : Integer; 7 | @mandatory title : localized String(111); 8 | descr : localized String(1111); 9 | @mandatory author : Association to Authors; 10 | genre : Association to Genres; 11 | stock : Integer; 12 | price : Decimal; 13 | currency : Currency; 14 | image : LargeBinary @Core.MediaType : 'image/png'; 15 | } 16 | 17 | entity Authors : managed { 18 | key ID : Integer; 19 | @mandatory name : String(111); 20 | dateOfBirth : Date; 21 | dateOfDeath : Date; 22 | placeOfBirth : String; 23 | placeOfDeath : String; 24 | books : Association to many Books on books.author = $self; 25 | } 26 | 27 | /** Hierarchically organized Code List for Genres */ 28 | entity Genres : sap.common.CodeList { 29 | key ID : Integer; 30 | parent : Association to Genres; 31 | children : Composition of many Genres on children.parent = $self; 32 | } 33 | -------------------------------------------------------------------------------- /.github/workflows/release.yml: -------------------------------------------------------------------------------- 1 | name: Release 2 | 3 | permissions: 4 | contents: write 5 | id-token: write 6 | 7 | on: 8 | workflow_dispatch: 9 | 10 | jobs: 11 | publish-npm: 12 | runs-on: ubuntu-latest 13 | environment: npm 14 | steps: 15 | - uses: actions/checkout@v3 16 | - uses: actions/setup-node@v3 17 | with: 18 | node-version: 24 19 | registry-url: https://registry.npmjs.org/ 20 | - name: run tests 21 | run: | 22 | npm i -g @sap/cds-dk 23 | npm i 24 | npm run lint 25 | npm run test 26 | - name: get version 27 | id: package-version 28 | uses: martinbeentjes/npm-get-version-action@v1.2.3 29 | - name: parse changelog 30 | id: parse-changelog 31 | uses: schwma/parse-changelog-action@v1.0.0 32 | with: 33 | version: '${{ steps.package-version.outputs.current-version }}' 34 | - name: create a GitHub release 35 | uses: ncipollo/release-action@v1 36 | with: 37 | tag: 'v${{ steps.package-version.outputs.current-version }}' 38 | body: '${{ steps.parse-changelog.outputs.body }}' 39 | - run: npm publish --access public --provenance 40 | -------------------------------------------------------------------------------- /tests/sample/app/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | Bookshop 8 | 9 | 15 | 16 | 20 | 30 | 33 | 34 | 35 | 36 | -------------------------------------------------------------------------------- /lib/fuzzyTopN.js: -------------------------------------------------------------------------------- 1 | export default function fuzzyTopN(searchTerm, list, n, min) { 2 | function modifiedLevenshtein(a, b) { 3 | const m = a.length 4 | const n = b.length 5 | const matrix = Array.from({ length: m + 1 }, () => Array(n + 1).fill(0)) 6 | 7 | for (let i = 0; i <= m; i++) matrix[i][0] = i * 0.5 8 | for (let j = 0; j <= n; j++) matrix[0][j] = j * 0.5 9 | 10 | for (let i = 1; i <= m; i++) { 11 | for (let j = 1; j <= n; j++) { 12 | const cost = a[i - 1] === b[j - 1] ? 0 : 1 13 | matrix[i][j] = Math.min( 14 | matrix[i - 1][j] + 0.5, // deletion 15 | matrix[i][j - 1] + 0.5, // insertion 16 | matrix[i - 1][j - 1] + cost // substitution 17 | ) 18 | } 19 | } 20 | 21 | return matrix[m][n] 22 | } 23 | 24 | function score(term, content) { 25 | term = term.toLowerCase() 26 | content = content.toLowerCase() 27 | const distance = modifiedLevenshtein(term, content) 28 | const maxLength = Math.max(term.length, content.length) 29 | return maxLength === 0 ? 1 : 1 - distance / maxLength 30 | } 31 | 32 | let result = list.map(item => ({ item, score: score(searchTerm, item) })) 33 | if (min) result = result.filter(entry => entry.score >= min) 34 | return result.sort((a, b) => b.score - a.score).slice(0, n) 35 | } 36 | -------------------------------------------------------------------------------- /tests/sample/srv/cat-service.js: -------------------------------------------------------------------------------- 1 | const cds = require('@sap/cds') 2 | 3 | module.exports = class CatalogService extends cds.ApplicationService { 4 | init() { 5 | const { Books } = cds.entities('sap.capire.bookshop') 6 | const { ListOfBooks } = this.entities 7 | 8 | // Add some discount for overstocked books 9 | this.after('each', ListOfBooks, book => { 10 | if (book.stock > 111) book.title += ` -- 11% discount!` 11 | }) 12 | 13 | // Reduce stock of ordered books if available stock suffices 14 | this.on('submitOrder', async req => { 15 | let { book: id, quantity } = req.data 16 | let book = await SELECT.one.from(Books, id, b => b.stock) 17 | 18 | // Validate input data 19 | if (!book) return req.error(404, `Book #${id} doesn't exist`) 20 | if (quantity < 1) return req.error(400, `quantity has to be 1 or more`) 21 | if (!book.stock || quantity > book.stock) return req.error(409, `${quantity} exceeds stock for book #${id}`) 22 | 23 | // Reduce stock in database and return updated stock value 24 | await UPDATE(Books, id).with({ stock: (book.stock -= quantity) }) 25 | return book 26 | }) 27 | 28 | // Emit event when an order has been submitted 29 | this.after('submitOrder', async (_, req) => { 30 | let { book, quantity } = req.data 31 | await this.emit('OrderedBook', { book, quantity, buyer: req.user.id }) 32 | }) 33 | 34 | // Delegate requests to the underlying generic service 35 | return super.init() 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /tests/sample/app/browse/fiori-service.cds: -------------------------------------------------------------------------------- 1 | using { CatalogService } from '../../srv/cat-service.cds'; 2 | 3 | //////////////////////////////////////////////////////////////////////////// 4 | // 5 | // Books Object Page 6 | // 7 | annotate CatalogService.Books with @(UI : { 8 | HeaderInfo: { 9 | TypeName : '{i18n>Book}', 10 | TypeNamePlural: '{i18n>Books}', 11 | Title : {Value: title}, 12 | Description : {Value : author} 13 | }, 14 | HeaderFacets: [{ 15 | $Type : 'UI.ReferenceFacet', 16 | Label : '{i18n>Description}', 17 | Target: '@UI.FieldGroup#Descr' 18 | }, ], 19 | Facets: [{ 20 | $Type : 'UI.ReferenceFacet', 21 | Label : '{i18n>Details}', 22 | Target: '@UI.FieldGroup#Price' 23 | }, ], 24 | FieldGroup #Descr: {Data : [{Value : descr}, ]}, 25 | FieldGroup #Price: {Data : [ 26 | {Value: price}, 27 | { 28 | Value: currency.symbol, 29 | Label: '{i18n>Currency}' 30 | }, 31 | ]}, 32 | }); 33 | 34 | //////////////////////////////////////////////////////////////////////////// 35 | // 36 | // Books List Page 37 | // 38 | annotate CatalogService.Books with @(UI : { 39 | SelectionFields: [ 40 | ID, 41 | price, 42 | currency_code 43 | ], 44 | LineItem: [ 45 | { 46 | Value: ID, 47 | Label: '{i18n>Title}' 48 | }, 49 | { 50 | Value: author, 51 | Label: '{i18n>Author}' 52 | }, 53 | {Value: genre.name}, 54 | {Value: price}, 55 | {Value: currency.symbol}, 56 | ] 57 | }); 58 | -------------------------------------------------------------------------------- /REUSE.toml: -------------------------------------------------------------------------------- 1 | version = 1 2 | SPDX-PackageName = "mcp-server" 3 | SPDX-PackageSupplier = "The CAP team " 4 | SPDX-PackageDownloadLocation = "https://github.com/cap-js/mcp-server" 5 | SPDX-PackageComment = "The code in this project may include calls to APIs (\"API Calls\") of\n SAP or third-party products or services developed outside of this project\n (\"External Products\").\n \"APIs\" means application programming interfaces, as well as their respective\n specifications and implementing code that allows software to communicate with\n other software.\n API Calls to External Products are not licensed under the open source license\n that governs this project. The use of such API Calls and related External\n Products are subject to applicable additional agreements with the relevant\n provider of the External Products. In no event shall the open source license\n that governs this project grant any rights in or to any External Products, or\n alter, expand or supersede any terms of the applicable additional agreements.\n If you have a valid license agreement with SAP for the use of a particular SAP\n External Product, then you may make use of any API Calls included in this\n project's code for that SAP External Product, subject to the terms of such\n license agreement. If you do not have a valid license agreement for the use of\n a particular SAP External Product, then you may only make use of any API Calls\n in this project for that SAP External Product for your internal, non-productive\n and non-commercial test and evaluation of such API Calls. Nothing herein grants\n you any rights to use or access any SAP External Product, or provide any third\n parties the right to use of access any SAP External Product, through API Calls." 6 | 7 | [[annotations]] 8 | path = "**" 9 | precedence = "aggregate" 10 | SPDX-FileCopyrightText = "2025 SAP SE or an SAP affiliate company and mcp-server contributors." 11 | SPDX-License-Identifier = "Apache-2.0" 12 | -------------------------------------------------------------------------------- /tests/sample/db/data/sap.capire.bookshop-Books_texts.csv: -------------------------------------------------------------------------------- 1 | ID_texts,ID,locale,title,descr 2 | 52eee553-266d-4fdd-a5ca-909910e76ae4,201,de,Sturmhöhe,"Sturmhöhe (Originaltitel: Wuthering Heights) ist der einzige Roman der englischen Schriftstellerin Emily Brontë (1818–1848). Der 1847 unter dem Pseudonym Ellis Bell veröffentlichte Roman wurde vom viktorianischen Publikum weitgehend abgelehnt, heute gilt er als ein Klassiker der britischen Romanliteratur des 19. Jahrhunderts." 3 | 54e58142-f06e-49c1-a51d-138f86cea34e,201,fr,Les Hauts de Hurlevent,"Les Hauts de Hurlevent (titre original : Wuthering Heights), parfois orthographié Les Hauts de Hurle-Vent, est l'unique roman d'Emily Brontë, publié pour la première fois en 1847 sous le pseudonyme d’Ellis Bell. Loin d'être un récit moralisateur, Emily Brontë achève néanmoins le roman dans une atmosphère sereine, suggérant le triomphe de la paix et du Bien sur la vengeance et le Mal." 4 | bbbf8a88-797d-4790-af1c-1cc857718ee0,207,de,Jane Eyre,"Jane Eyre. Eine Autobiographie (Originaltitel: Jane Eyre. An Autobiography), erstmals erschienen im Jahr 1847 unter dem Pseudonym Currer Bell, ist der erste veröffentlichte Roman der britischen Autorin Charlotte Brontë und ein Klassiker der viktorianischen Romanliteratur des 19. Jahrhunderts. Der Roman erzählt in Form einer Ich-Erzählung die Lebensgeschichte von Jane Eyre (ausgesprochen /ˌdʒeɪn ˈɛə/), die nach einer schweren Kindheit eine Stelle als Gouvernante annimmt und sich in ihren Arbeitgeber verliebt, jedoch immer wieder um ihre Freiheit und Selbstbestimmung kämpfen muss. Als klein, dünn, blass, stets schlicht dunkel gekleidet und mit strengem Mittelscheitel beschrieben, gilt die Heldin des Romans Jane Eyre nicht zuletzt aufgrund der Kino- und Fernsehversionen der melodramatischen Romanvorlage als die bekannteste englische Gouvernante der Literaturgeschichte" 5 | a90d4378-1a3e-48e7-b60b-5670e78807e1,252,de,Eleonora,“Eleonora” ist eine Erzählung von Edgar Allan Poe. Sie wurde 1841 erstveröffentlicht. In ihr geht es um das Paradox der Treue in der Treulosigkeit. 6 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # Contributing 2 | 3 | ## Code of Conduct 4 | 5 | All members of the project community must abide by the [SAP Open Source Code of Conduct](https://github.com/SAP/.github/blob/main/CODE_OF_CONDUCT.md). 6 | Only by respecting each other we can develop a productive, collaborative community. 7 | Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting [a project maintainer](.reuse/dep5). 8 | 9 | ## Engaging in Our Project 10 | 11 | We use GitHub to manage reviews of pull requests. 12 | 13 | * If you are a new contributor, see: [Steps to Contribute](#steps-to-contribute) 14 | 15 | * Before implementing your change, create an issue that describes the problem you would like to solve or the code that should be enhanced. Please note that you are willing to work on that issue. 16 | 17 | * The team will review the issue and decide whether it should be implemented as a pull request. In that case, they will assign the issue to you. If the team decides against picking up the issue, the team will post a comment with an explanation. 18 | 19 | ## Steps to Contribute 20 | 21 | Should you wish to work on an issue, please claim it first by commenting on the GitHub issue that you want to work on. This is to prevent duplicated efforts from other contributors on the same issue. 22 | 23 | If you have questions about one of the issues, please comment on them, and one of the maintainers will clarify. 24 | 25 | ## Contributing Code or Documentation 26 | 27 | You are welcome to contribute code in order to fix a bug or to implement a new feature that is logged as an issue. 28 | 29 | The following rule governs code contributions: 30 | 31 | * Contributions must be licensed under the [Apache 2.0 License](./LICENSE) 32 | * Due to legal reasons, contributors will be asked to accept a Developer Certificate of Origin (DCO) when they create the first pull request to this project. This happens in an automated fashion during the submission process. SAP uses [the standard DCO text of the Linux Foundation](https://developercertificate.org/). 33 | 34 | ## Issues and Planning 35 | 36 | * We use GitHub issues to track bugs and enhancement requests. 37 | 38 | * Please provide as much context as possible when you open an issue. The information you provide must be comprehensive enough to reproduce that issue for the assignee. 39 | -------------------------------------------------------------------------------- /lib/run.js: -------------------------------------------------------------------------------- 1 | import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js' 2 | import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js' 3 | import tools from './tools.js' 4 | 5 | export function registerTools(server) { 6 | for (const t in tools) { 7 | const tool = tools[t] 8 | const _text = 9 | fn => 10 | async (...args) => { 11 | const result = await fn(...args).catch(error => error.message) 12 | return { 13 | content: [ 14 | { 15 | type: 'text', 16 | text: typeof result === 'object' ? JSON.stringify(result) : result 17 | } 18 | ] 19 | } 20 | } 21 | server.registerTool(t, tool, _text(tool.handler)) 22 | } 23 | return server 24 | } 25 | 26 | /* eslint-disable no-console */ 27 | export async function runTool(toolName, ...args) { 28 | const tool = tools[toolName] 29 | if (!tool) { 30 | console.error(`Tool '${toolName}' not found`) 31 | console.error(`Available tools: ${Object.keys(tools).join(', ')}`) 32 | process.exit(1) 33 | } 34 | 35 | // Parse arguments into an object based on tool schema 36 | const schema = tool.inputSchema 37 | const schemaKeys = Object.keys(schema) 38 | const params = {} 39 | 40 | for (let i = 0; i < args.length; i++) { 41 | const key = schemaKeys[i] 42 | if (key) { 43 | params[key] = args[i] 44 | } 45 | } 46 | 47 | try { 48 | const result = await tool.handler(params) 49 | console.log(typeof result === 'object' ? JSON.stringify(result, null, 2) : result) 50 | return result 51 | } catch (error) { 52 | console.error('Error:', error.message) 53 | process.exit(1) 54 | } 55 | } 56 | 57 | export default async function run(serverInstance = null) { 58 | // If a server instance is provided, register tools on it 59 | if (serverInstance) { 60 | return registerTools(serverInstance) 61 | } 62 | 63 | // Otherwise, create and start a new server 64 | const server = new McpServer({ 65 | name: 'cds-mcp', 66 | version: '0.1.0' 67 | }) 68 | 69 | registerTools(server) 70 | 71 | const transport = new StdioServerTransport() 72 | await server.connect(transport).catch(error => { 73 | console.error('Fatal error in main():', error) 74 | process.exit(1) 75 | }) 76 | 77 | return server 78 | } 79 | -------------------------------------------------------------------------------- /lib/tools.js: -------------------------------------------------------------------------------- 1 | import { z } from 'zod' 2 | import getModel from './getModel.js' 3 | import fuzzyTopN from './fuzzyTopN.js' 4 | import searchMarkdownDocs from './searchMarkdownDocs.js' 5 | 6 | const tools = { 7 | search_model: { 8 | title: 'Search for CDS definitions', 9 | description: 10 | 'Returns CDS model definitions (CSN), including elements, annotations, parameters, file locations and HTTP endpoints. Useful for building queries, OData URLs, or modifying models.', 11 | inputSchema: { 12 | projectPath: z.string().describe('Root path of the project'), 13 | name: z.string().optional().describe('Definition name (fuzzy search; no regex or special characters)'), 14 | kind: z.string().optional().describe('Definition kind to filter by (e.g., service, entity, action)'), 15 | topN: z.number().default(1).describe('Maximum number of results'), 16 | namesOnly: z.boolean().default(false).describe('If true, only return definition names (for overview)') 17 | }, 18 | annotations: { 19 | readOnlyHint: true, 20 | destructiveHint: false, 21 | idempotentHint: false 22 | }, 23 | handler: async ({ projectPath, name, kind, topN, namesOnly }) => { 24 | const model = await getModel(projectPath) 25 | const defNames = kind 26 | ? Object.entries(model.definitions) 27 | // eslint-disable-next-line no-unused-vars 28 | .filter(([_k, v]) => v.kind === kind) 29 | .map(([k]) => k) 30 | : Object.keys(model.definitions) 31 | const scores = name ? fuzzyTopN(name, defNames, topN) : fuzzyTopN('', defNames, topN) 32 | if (namesOnly) return scores.map(s => s.item) 33 | return scores.map(s => model.definitions[s.item]) 34 | } 35 | }, 36 | search_docs: { 37 | title: 'Search in CAP Documentation', 38 | annotations: { 39 | readOnlyHint: true, 40 | destructiveHint: false, 41 | idempotentHint: true 42 | }, 43 | description: 44 | "Searches code snippets of CAP documentation for the given query. You MUST use this tool if you're unsure about CAP APIs for CDS, Node.js or Java. Optionally returns only code blocks.", 45 | inputSchema: { 46 | query: z.string().describe('Search string'), 47 | maxResults: z.number().default(10).describe('Maximum number of results') 48 | }, 49 | handler: async ({ query, maxResults }) => { 50 | return await searchMarkdownDocs(query, maxResults) 51 | } 52 | } 53 | } 54 | 55 | export default tools 56 | -------------------------------------------------------------------------------- /tests/sample/db/data/sap.capire.bookshop-Books.csv: -------------------------------------------------------------------------------- 1 | ID,title,descr,author_ID,stock,price,currency_code,genre_ID 2 | 201,Wuthering Heights,"Wuthering Heights, Emily Brontë's only novel, was published in 1847 under the pseudonym ""Ellis Bell"". It was written between October 1845 and June 1846. Wuthering Heights and Anne Brontë's Agnes Grey were accepted by publisher Thomas Newby before the success of their sister Charlotte's novel Jane Eyre. After Emily's death, Charlotte edited the manuscript of Wuthering Heights and arranged for the edited version to be published as a posthumous second edition in 1850.",101,12,11.11,GBP,11 3 | 207,Jane Eyre,"Jane Eyre /ɛər/ (originally published as Jane Eyre: An Autobiography) is a novel by English writer Charlotte Brontë, published under the pen name ""Currer Bell"", on 16 October 1847, by Smith, Elder & Co. of London. The first American edition was published the following year by Harper & Brothers of New York. Primarily a bildungsroman, Jane Eyre follows the experiences of its eponymous heroine, including her growth to adulthood and her love for Mr. Rochester, the brooding master of Thornfield Hall. The novel revolutionised prose fiction in that the focus on Jane's moral and spiritual development is told through an intimate, first-person narrative, where actions and events are coloured by a psychological intensity. The book contains elements of social criticism, with a strong sense of Christian morality at its core and is considered by many to be ahead of its time because of Jane's individualistic character and how the novel approaches the topics of class, sexuality, religion and feminism.",107,11,12.34,GBP,11 4 | 251,The Raven,"""The Raven"" is a narrative poem by American writer Edgar Allan Poe. First published in January 1845, the poem is often noted for its musicality, stylized language, and supernatural atmosphere. It tells of a talking raven's mysterious visit to a distraught lover, tracing the man's slow fall into madness. The lover, often identified as being a student, is lamenting the loss of his love, Lenore. Sitting on a bust of Pallas, the raven seems to further distress the protagonist with its constant repetition of the word ""Nevermore"". The poem makes use of folk, mythological, religious, and classical references.",150,333,13.13,USD,16 5 | 252,Eleonora,"""Eleonora"" is a short story by Edgar Allan Poe, first published in 1842 in Philadelphia in the literary annual The Gift. It is often regarded as somewhat autobiographical and has a relatively ""happy"" ending.",150,555,14,USD,16 6 | 271,Catweazle,"Catweazle is a British fantasy television series, starring Geoffrey Bayldon in the title role, and created by Richard Carpenter for London Weekend Television. The first series, produced and directed by Quentin Lawrence, was screened in the UK on ITV in 1970. The second series, directed by David Reid and David Lane, was shown in 1971. Each series had thirteen episodes, most but not all written by Carpenter, who also published two books based on the scripts.",170,22,150,JPY,13 7 | -------------------------------------------------------------------------------- /tests/sample/app/appconfig/fioriSandboxConfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "services": { 3 | "LaunchPage": { 4 | "adapter": { 5 | "config": { 6 | "catalogs": [], 7 | "groups": [ 8 | { 9 | "id": "Bookshop", 10 | "title": "Bookshop", 11 | "isPreset": true, 12 | "isVisible": true, 13 | "isGroupLocked": false, 14 | "tiles": [ 15 | { 16 | "id": "BrowseBooks", 17 | "tileType": "sap.ushell.ui.tile.StaticTile", 18 | "properties": { 19 | "title": "Browse Books", 20 | "targetURL": "#Books-display" 21 | } 22 | } 23 | ] 24 | }, 25 | { 26 | "id": "Administration", 27 | "title": "Administration", 28 | "isPreset": true, 29 | "isVisible": true, 30 | "isGroupLocked": false, 31 | "tiles": [ 32 | { 33 | "id": "ManageBooks", 34 | "tileType": "sap.ushell.ui.tile.StaticTile", 35 | "properties": { 36 | "title": "Manage Books", 37 | "targetURL": "#Books-manage" 38 | } 39 | } 40 | ] 41 | } 42 | ] 43 | } 44 | } 45 | }, 46 | "NavTargetResolution": { 47 | "config": { 48 | "enableClientSideTargetResolution": true 49 | } 50 | }, 51 | "ClientSideTargetResolution": { 52 | "adapter": { 53 | "config": { 54 | "inbounds": { 55 | "BrowseBooks": { 56 | "semanticObject": "Books", 57 | "action": "display", 58 | "title": "Browse Books", 59 | "signature": { 60 | "parameters": { 61 | "Books.ID": { 62 | "renameTo": "ID" 63 | }, 64 | "Authors.books.ID": { 65 | "renameTo": "ID" 66 | } 67 | }, 68 | "additionalParameters": "ignored" 69 | }, 70 | "resolutionResult": { 71 | "applicationType": "SAPUI5", 72 | "additionalInformation": "SAPUI5.Component=bookshop", 73 | "url": "browse/webapp" 74 | } 75 | }, 76 | "ManageBooks": { 77 | "semanticObject": "Books", 78 | "action": "manage", 79 | "title": "Manage Books", 80 | "signature": { 81 | "parameters": {}, 82 | "additionalParameters": "allowed" 83 | }, 84 | "resolutionResult": { 85 | "applicationType": "SAPUI5", 86 | "additionalInformation": "SAPUI5.Component=books", 87 | "url": "admin-books/webapp" 88 | } 89 | } 90 | } 91 | } 92 | } 93 | } 94 | } 95 | } 96 | -------------------------------------------------------------------------------- /tests/cli.test.js: -------------------------------------------------------------------------------- 1 | // CLI test for cds-mcp command-line usage 2 | import assert from 'node:assert' 3 | import { test } from 'node:test' 4 | import { spawn } from 'node:child_process' 5 | import { join, dirname } from 'path' 6 | import { fileURLToPath } from 'url' 7 | 8 | const sampleProjectPath = join(dirname(fileURLToPath(import.meta.url)), 'sample') 9 | const cdsMcpPath = join(dirname(fileURLToPath(import.meta.url)), '../index.js') 10 | 11 | function runCliCommand(args, options = {}) { 12 | return new Promise((resolve, reject) => { 13 | const child = spawn('node', [cdsMcpPath, ...args], { 14 | ...options, 15 | stdio: 'pipe' 16 | }) 17 | 18 | let stdout = '' 19 | let stderr = '' 20 | 21 | child.stdout.on('data', data => { 22 | stdout += data.toString() 23 | }) 24 | 25 | child.stderr.on('data', data => { 26 | stderr += data.toString() 27 | }) 28 | 29 | child.on('close', code => { 30 | resolve({ code, stdout, stderr }) 31 | }) 32 | 33 | child.on('error', error => { 34 | reject(error) 35 | }) 36 | }) 37 | } 38 | 39 | test.describe('CLI usage', () => { 40 | test('search_model subcommand works', async () => { 41 | const result = await runCliCommand(['search_model', sampleProjectPath, 'Books', 'entity']) 42 | 43 | assert.equal(result.code, 0, 'Command should exit with code 0') 44 | assert(result.stdout.length > 0, 'Should produce output') 45 | 46 | const output = JSON.parse(result.stdout) 47 | assert(Array.isArray(output), 'Output should be an array') 48 | assert(output.length > 0, 'Should find at least one result') 49 | assert(output[0].name, 'Result should have a name property') 50 | }) 51 | 52 | test('search_docs subcommand works', async () => { 53 | const result = await runCliCommand(['search_docs', 'select statement']) 54 | 55 | assert.equal(result.code, 0, 'Command should exit with code 0') 56 | assert(result.stdout.length > 0, 'Should produce output') 57 | 58 | // search_docs returns plain text, not JSON 59 | assert(typeof result.stdout === 'string', 'Output should be a string') 60 | assert(result.stdout.includes('---'), 'Output should contain document separators') 61 | }) 62 | 63 | test('invalid tool name shows error', async () => { 64 | const result = await runCliCommand(['invalid_tool', 'arg1']) 65 | 66 | assert.equal(result.code, 1, 'Command should exit with code 1') 67 | assert(result.stderr.includes("Tool 'invalid_tool' not found"), 'Should show tool not found error') 68 | assert(result.stderr.includes('Available tools:'), 'Should list available tools') 69 | }) 70 | 71 | test('no arguments starts MCP server mode', async () => { 72 | const child = spawn('node', [cdsMcpPath], { 73 | stdio: 'pipe' 74 | }) 75 | 76 | // Give the server a moment to start 77 | await new Promise(resolve => setTimeout(resolve, 100)) 78 | 79 | // Kill the process 80 | child.kill('SIGTERM') 81 | 82 | // Wait for it to close 83 | await new Promise(resolve => child.on('close', resolve)) 84 | 85 | assert(true, 'MCP server should start and be killable') 86 | }) 87 | }) 88 | -------------------------------------------------------------------------------- /tests/sample/app/admin-books/fiori-service.cds: -------------------------------------------------------------------------------- 1 | using { AdminService } from '../../srv/admin-service.cds'; 2 | using { sap.capire.bookshop } from '../../db/schema'; 3 | 4 | //////////////////////////////////////////////////////////////////////////// 5 | // 6 | // Books Object Page 7 | // 8 | 9 | annotate AdminService.Books with @(UI: { 10 | HeaderInfo : { 11 | TypeName : '{i18n>Book}', 12 | TypeNamePlural: '{i18n>Books}', 13 | Title : {Value: title}, 14 | Description : {Value: author.name} 15 | }, 16 | Facets: [ 17 | { 18 | $Type : 'UI.ReferenceFacet', 19 | Label : '{i18n>General}', 20 | Target: '@UI.FieldGroup#General' 21 | }, 22 | { 23 | $Type : 'UI.ReferenceFacet', 24 | Label : '{i18n>Translations}', 25 | Target: 'texts/@UI.LineItem' 26 | }, 27 | { 28 | $Type : 'UI.ReferenceFacet', 29 | Label : '{i18n>Details}', 30 | Target: '@UI.FieldGroup#Details' 31 | }, 32 | { 33 | $Type : 'UI.ReferenceFacet', 34 | Label : '{i18n>Admin}', 35 | Target: '@UI.FieldGroup#Admin' 36 | }, 37 | ], 38 | FieldGroup #General: {Data: [ 39 | {Value: title}, 40 | {Value: author_ID}, 41 | {Value: genre_ID}, 42 | {Value: descr}, 43 | ]}, 44 | FieldGroup #Details: {Data: [ 45 | {Value: stock}, 46 | {Value: price}, 47 | { 48 | Value: currency_code, 49 | Label: '{i18n>Currency}' 50 | }, 51 | ]}, 52 | FieldGroup #Admin: {Data: [ 53 | {Value: createdBy}, 54 | {Value: createdAt}, 55 | {Value: modifiedBy}, 56 | {Value: modifiedAt} 57 | ]} 58 | }); 59 | 60 | 61 | //////////////////////////////////////////////////////////// 62 | // 63 | // Draft for Localized Data 64 | // 65 | 66 | annotate sap.capire.bookshop.Books with @fiori.draft.enabled; 67 | annotate AdminService.Books with @odata.draft.enabled; 68 | 69 | annotate AdminService.Books.texts with @(UI: { 70 | Identification: [{Value: title}], 71 | SelectionFields: [ 72 | locale, 73 | title 74 | ], 75 | LineItem: [ 76 | { 77 | Value: locale, 78 | Label: 'Locale' 79 | }, 80 | { 81 | Value: title, 82 | Label: 'Title' 83 | }, 84 | { 85 | Value: descr, 86 | Label: 'Description' 87 | }, 88 | ] 89 | }); 90 | 91 | annotate AdminService.Books.texts with { 92 | ID @UI.Hidden; 93 | ID_texts @UI.Hidden; 94 | }; 95 | 96 | // Add Value Help for Locales 97 | annotate AdminService.Books.texts { 98 | locale @( 99 | ValueList.entity: 'Languages', 100 | Common.ValueListWithFixedValues, //show as drop down, not a dialog 101 | ) 102 | }; 103 | 104 | // In addition we need to expose Languages through AdminService as a target for ValueList 105 | using {sap} from '@sap/cds/common'; 106 | 107 | extend service AdminService { 108 | @readonly entity Languages as projection on sap.common.Languages; 109 | } 110 | 111 | // Workaround for Fiori popup for asking user to enter a new UUID on Create 112 | annotate AdminService.Books with { 113 | ID @Core.Computed; 114 | } 115 | 116 | // Show Genre as drop down, not a dialog 117 | annotate AdminService.Books with { 118 | genre @Common.ValueListWithFixedValues; 119 | } 120 | -------------------------------------------------------------------------------- /tests/sample/app/browse/webapp/manifest.json: -------------------------------------------------------------------------------- 1 | { 2 | "_version": "1.49.0", 3 | "sap.app": { 4 | "id": "sample.browse", 5 | "applicationVersion": { 6 | "version": "1.0.0" 7 | }, 8 | "type": "application", 9 | "title": "{{appTitle}}", 10 | "description": "{{appDescription}}", 11 | "i18n": "i18n/i18n.properties", 12 | "dataSources": { 13 | "CatalogService": { 14 | "uri": "odata/v4/catalog/", 15 | "type": "OData", 16 | "settings": { 17 | "odataVersion": "4.0" 18 | } 19 | } 20 | }, 21 | "crossNavigation": { 22 | "inbounds": { 23 | "Books-display": { 24 | "signature": { 25 | "parameters": { 26 | "Books.ID": { 27 | "renameTo": "ID" 28 | }, 29 | "Authors.books.ID": { 30 | "renameTo": "ID" 31 | } 32 | }, 33 | "additionalParameters": "allowed" 34 | }, 35 | "semanticObject": "Books", 36 | "action": "display", 37 | "title": "{{appTitle}}", 38 | "info": "{{appInfo}}", 39 | "subTitle": "{{appSubTitle}}", 40 | "icon": "sap-icon://course-book", 41 | "indicatorDataSource": { 42 | "dataSource": "CatalogService", 43 | "path": "Books/$count", 44 | "refresh": 1800 45 | } 46 | } 47 | } 48 | } 49 | }, 50 | "sap.ui": { 51 | "technology": "UI5", 52 | "fullWidth": false, 53 | "deviceTypes": { 54 | "desktop": true, 55 | "tablet": true, 56 | "phone": true 57 | } 58 | }, 59 | "sap.ui5": { 60 | "dependencies": { 61 | "minUI5Version": "1.115.1", 62 | "libs": { 63 | "sap.fe.templates": {} 64 | } 65 | }, 66 | "models": { 67 | "i18n": { 68 | "type": "sap.ui.model.resource.ResourceModel", 69 | "uri": "i18n/i18n.properties" 70 | }, 71 | "": { 72 | "dataSource": "CatalogService", 73 | "settings": { 74 | "operationMode": "Server", 75 | "autoExpandSelect": true, 76 | "earlyRequests": true, 77 | "groupProperties": { 78 | "default": { 79 | "submit": "Auto" 80 | } 81 | } 82 | } 83 | } 84 | }, 85 | "routing": { 86 | "routes": [ 87 | { 88 | "pattern": ":?query:", 89 | "name": "BooksList", 90 | "target": "BooksList" 91 | }, 92 | { 93 | "pattern": "Books({key}):?query:", 94 | "name": "BooksDetails", 95 | "target": "BooksDetails" 96 | } 97 | ], 98 | "targets": { 99 | "BooksList": { 100 | "type": "Component", 101 | "id": "BooksList", 102 | "name": "sap.fe.templates.ListReport", 103 | "options": { 104 | "settings": { 105 | "entitySet": "Books", 106 | "initialLoad": true, 107 | "navigation": { 108 | "Books": { 109 | "detail": { 110 | "route": "BooksDetails" 111 | } 112 | } 113 | } 114 | } 115 | } 116 | }, 117 | "BooksDetails": { 118 | "type": "Component", 119 | "id": "BooksDetailsList", 120 | "name": "sap.fe.templates.ObjectPage", 121 | "options": { 122 | "settings": { 123 | "entitySet": "Books" 124 | } 125 | } 126 | } 127 | } 128 | }, 129 | "contentDensities": { 130 | "compact": true, 131 | "cozy": true 132 | } 133 | }, 134 | "sap.fiori": { 135 | "registrationIds": [], 136 | "archeType": "transactional" 137 | } 138 | } 139 | -------------------------------------------------------------------------------- /tests/sample/app/admin-books/webapp/manifest.json: -------------------------------------------------------------------------------- 1 | { 2 | "_version": "1.49.0", 3 | "sap.app": { 4 | "id": "sample.admin-books", 5 | "applicationVersion": { 6 | "version": "1.0.0" 7 | }, 8 | "type": "application", 9 | "title": "{{appTitle}}", 10 | "description": "{{appDescription}}", 11 | "i18n": "i18n/i18n.properties", 12 | "dataSources": { 13 | "AdminService": { 14 | "uri": "odata/v4/admin/", 15 | "type": "OData", 16 | "settings": { 17 | "odataVersion": "4.0" 18 | } 19 | } 20 | }, 21 | "crossNavigation": { 22 | "inbounds": { 23 | "intent-Books-manage": { 24 | "signature": { 25 | "parameters": {}, 26 | "additionalParameters": "allowed" 27 | }, 28 | "semanticObject": "Books", 29 | "action": "manage" 30 | } 31 | } 32 | } 33 | }, 34 | "sap.ui": { 35 | "technology": "UI5", 36 | "fullWidth": false, 37 | "deviceTypes": { 38 | "desktop": true, 39 | "tablet": true, 40 | "phone": true 41 | } 42 | }, 43 | "sap.ui5": { 44 | "dependencies": { 45 | "minUI5Version": "1.115.1", 46 | "libs": { 47 | "sap.fe.templates": {} 48 | } 49 | }, 50 | "models": { 51 | "i18n": { 52 | "type": "sap.ui.model.resource.ResourceModel", 53 | "uri": "i18n/i18n.properties" 54 | }, 55 | "": { 56 | "dataSource": "AdminService", 57 | "settings": { 58 | "operationMode": "Server", 59 | "autoExpandSelect": true, 60 | "earlyRequests": true, 61 | "groupProperties": { 62 | "default": { 63 | "submit": "Auto" 64 | } 65 | } 66 | } 67 | } 68 | }, 69 | "routing": { 70 | "routes": [ 71 | { 72 | "pattern": ":?query:", 73 | "name": "BooksList", 74 | "target": "BooksList" 75 | }, 76 | { 77 | "pattern": "Books({key}):?query:", 78 | "name": "BooksDetails", 79 | "target": "BooksDetails" 80 | }, 81 | { 82 | "pattern": "Books({key}/author({key2}):?query:", 83 | "name": "AuthorsDetails", 84 | "target": "AuthorsDetails" 85 | } 86 | ], 87 | "targets": { 88 | "BooksList": { 89 | "type": "Component", 90 | "id": "BooksList", 91 | "name": "sap.fe.templates.ListReport", 92 | "options": { 93 | "settings": { 94 | "entitySet": "Books", 95 | "initialLoad": true, 96 | "navigation": { 97 | "Books": { 98 | "detail": { 99 | "route": "BooksDetails" 100 | } 101 | } 102 | } 103 | } 104 | } 105 | }, 106 | "BooksDetails": { 107 | "type": "Component", 108 | "id": "BooksDetailsList", 109 | "name": "sap.fe.templates.ObjectPage", 110 | "options": { 111 | "settings": { 112 | "entitySet": "Books", 113 | "editableHeaderContent": false, 114 | "navigation": { 115 | "Authors": { 116 | "detail": { 117 | "route": "AuthorsDetails" 118 | } 119 | } 120 | } 121 | } 122 | } 123 | }, 124 | "AuthorsDetails": { 125 | "type": "Component", 126 | "id": "AuthorsDetailsList", 127 | "name": "sap.fe.templates.ObjectPage", 128 | "options": { 129 | "settings": { 130 | "entitySet": "Authors" 131 | } 132 | } 133 | } 134 | } 135 | }, 136 | "contentDensities": { 137 | "compact": true, 138 | "cozy": true 139 | } 140 | }, 141 | "sap.fiori": { 142 | "registrationIds": [], 143 | "archeType": "transactional" 144 | } 145 | } 146 | -------------------------------------------------------------------------------- /lib/searchMarkdownDocs.js: -------------------------------------------------------------------------------- 1 | import { loadChunks, searchEmbeddings } from './embeddings.js' 2 | import fs from 'fs/promises' 3 | import path from 'path' 4 | import { fileURLToPath } from 'url' 5 | 6 | const __dirname = path.dirname(fileURLToPath(import.meta.url)) 7 | const embeddingsDir = path.join(__dirname, '..', 'embeddings') 8 | const etagPath = path.join(embeddingsDir, 'code-chunks.etag') 9 | 10 | async function checkFilesExist(jsonPath, binPath) { 11 | const [jsonExists, binExists] = await Promise.all([ 12 | fs 13 | .access(jsonPath) 14 | .then(() => true) 15 | .catch(() => false), 16 | fs 17 | .access(binPath) 18 | .then(() => true) 19 | .catch(() => false) 20 | ]) 21 | 22 | return jsonExists && binExists 23 | } 24 | 25 | async function downloadEmbeddings() { 26 | try { 27 | await fs.mkdir(embeddingsDir, { recursive: true }) 28 | const jsonPath = path.join(embeddingsDir, 'code-chunks.json') 29 | const binPath = path.join(embeddingsDir, 'code-chunks.bin') 30 | 31 | const filesExist = await checkFilesExist(jsonPath, binPath) 32 | 33 | let storedEtag = null 34 | try { 35 | storedEtag = await fs.readFile(etagPath, 'utf-8') 36 | } catch { 37 | // No stored ETag found, first download 38 | } 39 | 40 | const headers = {} 41 | if (storedEtag) { 42 | headers['If-None-Match'] = storedEtag 43 | } 44 | 45 | const jsonResponse = await fetch('https://cap.cloud.sap/resources/embeddings/code-chunks.json', { headers }) 46 | 47 | if (jsonResponse.status === 304) { 48 | return 49 | } 50 | 51 | if (!jsonResponse.ok) { 52 | if (filesExist) { 53 | return 54 | } 55 | throw new Error(`Failed to download JSON: ${jsonResponse.status} ${jsonResponse.statusText}`) 56 | } 57 | 58 | const newEtag = jsonResponse.headers.get('etag') 59 | 60 | if (storedEtag && newEtag && storedEtag.trim() === newEtag.trim()) { 61 | return 62 | } 63 | 64 | const jsonData = await jsonResponse.arrayBuffer() 65 | 66 | const binResponse = await fetch('https://cap.cloud.sap/resources/embeddings/code-chunks.bin', { headers }) 67 | 68 | if (!binResponse.ok) { 69 | if (filesExist) { 70 | return 71 | } 72 | throw new Error(`Failed to download BIN: ${binResponse.status} ${binResponse.statusText}`) 73 | } 74 | 75 | const binData = await binResponse.arrayBuffer() 76 | 77 | const tempJsonPath = path.join(embeddingsDir, 'code-chunks.json.tmp') 78 | const tempBinPath = path.join(embeddingsDir, 'code-chunks.bin.tmp') 79 | 80 | try { 81 | await fs.writeFile(tempJsonPath, Buffer.from(jsonData)) 82 | await fs.writeFile(tempBinPath, Buffer.from(binData)) 83 | 84 | await fs.rename(tempJsonPath, jsonPath) 85 | await fs.rename(tempBinPath, binPath) 86 | 87 | if (newEtag) { 88 | await fs.writeFile(etagPath, newEtag) 89 | } 90 | } catch (writeError) { 91 | try { 92 | await fs.unlink(tempJsonPath).catch(() => {}) 93 | await fs.unlink(tempBinPath).catch(() => {}) 94 | } catch { 95 | // Ignore cleanup errors 96 | } 97 | 98 | if (filesExist) { 99 | return 100 | } 101 | throw writeError 102 | } 103 | } catch (error) { 104 | const jsonPath = path.join(embeddingsDir, 'code-chunks.json') 105 | const binPath = path.join(embeddingsDir, 'code-chunks.bin') 106 | 107 | const filesExist = await checkFilesExist(jsonPath, binPath) 108 | 109 | if (filesExist) { 110 | // Using existing files due to download failure 111 | } else { 112 | throw error 113 | } 114 | } 115 | } 116 | 117 | let downloadPromise = downloadEmbeddings() 118 | 119 | export default async function searchMarkdownDocs(query, maxResults = 10) { 120 | await downloadPromise 121 | 122 | async function searchWithRetry(retryCount = 0) { 123 | try { 124 | const chunks = await loadChunks('code-chunks') 125 | const results = (await searchEmbeddings(query, chunks)).slice(0, maxResults) 126 | return results.map(r => r.content).join('\n---\n') 127 | } catch (error) { 128 | if (error.code === 'EMBEDDINGS_CORRUPTED' && retryCount < 2) { 129 | downloadPromise = downloadEmbeddings() 130 | await downloadPromise 131 | return searchWithRetry(retryCount + 1) 132 | } 133 | 134 | throw error 135 | } 136 | } 137 | 138 | return searchWithRetry() 139 | } 140 | -------------------------------------------------------------------------------- /tests/integration.test.js: -------------------------------------------------------------------------------- 1 | // Integration test for mcp-server server 2 | import assert from 'node:assert' 3 | import { test } from 'node:test' 4 | import { Client } from '@modelcontextprotocol/sdk/client/index.js' 5 | import { StdioClientTransport } from '@modelcontextprotocol/sdk/client/stdio.js' 6 | import { join, dirname } from 'path' 7 | import { fileURLToPath } from 'url' 8 | import { unlinkSync, writeFileSync } from 'fs' 9 | import { setTimeout as wait } from 'timers/promises' 10 | 11 | const sampleProjectPath = join(dirname(fileURLToPath(import.meta.url)), 'sample') 12 | const cdsMcpPath = join(dirname(fileURLToPath(import.meta.url)), '../index.js') 13 | 14 | // --- Ensure testService.cds is removed after each test 15 | const testServicePathCorrect = join(dirname(fileURLToPath(import.meta.url)), 'sample', 'srv', 'testService.cds') 16 | 17 | test.describe('integration', () => { 18 | test.afterEach(() => { 19 | try { 20 | unlinkSync(testServicePathCorrect) 21 | } catch { 22 | /* ignore */ 23 | } 24 | }) 25 | 26 | test('spawn mcp-server and call search_model tool', async () => { 27 | // Step 2: Spawn the MCP server in the sample project directory 28 | const transport = new StdioClientTransport({ 29 | command: 'node', 30 | args: [cdsMcpPath], 31 | cwd: sampleProjectPath 32 | }) 33 | 34 | // Step 3: Use the MCP Client API to connect to the server 35 | const client = new Client({ name: 'integration-test', version: '1.0.0' }) 36 | await client.connect(transport) 37 | 38 | // Step 4: Programmatically call a tool and verify output 39 | const result = await client.callTool({ 40 | name: 'search_model', 41 | arguments: { 42 | projectPath: sampleProjectPath, 43 | kind: 'service', 44 | topN: 1 45 | } 46 | }) 47 | 48 | assert(Array.isArray(result.content), 'Tool result should be an array') 49 | assert(result.content.length > 0, 'Should return at least one result') 50 | const serviceResults = JSON.parse(result.content[0].text) 51 | assert.equal(serviceResults[0].name, 'AdminService', 'Should return the AdminService') 52 | // Step 5: Clean up 53 | await transport.close() 54 | }) 55 | 56 | // --- Test: model adapts to CDS file change (CDS_MCP_REFRESH_MS low) 57 | test('model adapts to CDS file change (CDS_MCP_REFRESH_MS low)', async () => { 58 | // Step 1: Start MCP server with low refresh interval 59 | const transport = new StdioClientTransport({ 60 | command: 'node', 61 | args: [cdsMcpPath], 62 | cwd: sampleProjectPath, 63 | env: { ...process.env, CDS_MCP_REFRESH_MS: '20' } 64 | }) 65 | 66 | const client = new Client({ 67 | name: 'integration-test-model-change', 68 | version: '1.0.0' 69 | }) 70 | await client.connect(transport) 71 | 72 | // Step 2: Ensure TestService/TestEntity are NOT found 73 | const serviceResultBefore = await client.callTool({ 74 | name: 'search_model', 75 | arguments: { 76 | projectPath: sampleProjectPath, 77 | kind: 'service', 78 | topN: 20 79 | } 80 | }) 81 | const servicesBefore = JSON.parse(serviceResultBefore.content[0].text) 82 | assert(!servicesBefore.some(s => s.name === 'TestService'), 'TestService should NOT be found before creation') 83 | 84 | const entityResultBefore = await client.callTool({ 85 | name: 'search_model', 86 | arguments: { 87 | projectPath: sampleProjectPath, 88 | kind: 'entity', 89 | topN: 20 90 | } 91 | }) 92 | const entitiesBefore = JSON.parse(entityResultBefore.content[0].text) 93 | assert(!entitiesBefore.some(e => e.name === 'TestEntity'), 'TestEntity should NOT be found before creation') 94 | 95 | // Step 3: Create testService.cds with a test entity/service 96 | const testServiceDef = `service TestService { entity TestEntity { key ID: Integer; name: String; } }` 97 | writeFileSync(testServicePathCorrect, testServiceDef) 98 | 99 | let foundService = false 100 | let foundEntity = false 101 | await wait(300) 102 | // Check for TestService 103 | const serviceResult = await client.callTool({ 104 | name: 'search_model', 105 | arguments: { 106 | projectPath: sampleProjectPath, 107 | kind: 'service', 108 | topN: 20 109 | } 110 | }) 111 | const services = JSON.parse(serviceResult.content[0].text) 112 | if (services.some(s => s.name === 'TestService')) { 113 | foundService = true 114 | } 115 | // Check for TestEntity 116 | const entityResult = await client.callTool({ 117 | name: 'search_model', 118 | arguments: { 119 | projectPath: sampleProjectPath, 120 | kind: 'entity', 121 | topN: 30 122 | } 123 | }) 124 | const entities = JSON.parse(entityResult.content[0].text) 125 | if (entities.some(e => e.name === 'TestService.TestEntity')) { 126 | foundEntity = true 127 | } 128 | assert(foundService, 'Model should adapt and expose TestService') 129 | assert(foundEntity, 'Model should adapt and expose TestEntity') 130 | 131 | // Step 5: Clean up 132 | await transport.close() 133 | }) 134 | }) 135 | -------------------------------------------------------------------------------- /tests/tools.test.js: -------------------------------------------------------------------------------- 1 | // Node.js test runner (test) for lib/tools.js 2 | import tools from '../lib/tools.js' 3 | import assert from 'node:assert' 4 | import { test } from 'node:test' 5 | import { fileURLToPath } from 'url' 6 | import { dirname, join } from 'path' 7 | 8 | // Point to the sample project directory 9 | const sampleProjectPath = join(dirname(fileURLToPath(import.meta.url)), 'sample') 10 | 11 | test.describe('tools', () => { 12 | test('search_model: should find services', async () => { 13 | const result = await tools.search_model.handler({ 14 | projectPath: sampleProjectPath, 15 | kind: 'service', 16 | topN: 3 17 | }) 18 | assert(Array.isArray(result), 'Result should be an array') 19 | assert(result.length > 0, 'Should find at least one service') 20 | assert.equal(result[0].name, 'AdminService', 'Should find Adminservice.Books service') 21 | assert(Array.isArray(result[0].exposedEntities), 'Should contain exposed entities') 22 | assert.equal(result[0].exposedEntities[0], 'AdminService.Books', 'Should contain exposed entities') 23 | }) 24 | 25 | test('search_model: endpoints', async () => { 26 | // Service endpoints 27 | const result = await tools.search_model.handler({ 28 | projectPath: sampleProjectPath, 29 | kind: 'service', 30 | topN: 3 31 | }) 32 | assert(Array.isArray(result[0].endpoints), 'Should contain endpoints') 33 | assert.equal(result[0].endpoints[0].kind, 'odata', 'Should contain odata endpoint kind') 34 | assert.equal(result[0].endpoints[0].path, 'odata/v4/admin/', 'Should contain endpoint path') 35 | 36 | // Entity endpoints 37 | const books = await tools.search_model.handler({ 38 | projectPath: sampleProjectPath, 39 | name: 'Books', 40 | kind: 'entity', 41 | topN: 2 42 | }) 43 | assert(Array.isArray(books[0].endpoints), 'Should contain endpoints') 44 | assert.equal(books[0].endpoints[0].kind, 'odata', 'Should contain odata endpoint kind') 45 | assert.equal(books[0].endpoints[0].path, 'odata/v4/admin/Books', 'Should contain endpoint path') 46 | }) 47 | 48 | test('search_model: fuzzy search for Books entity', async () => { 49 | const books = await tools.search_model.handler({ 50 | projectPath: sampleProjectPath, 51 | name: 'Books', 52 | kind: 'entity', 53 | topN: 2 54 | }) 55 | assert(Array.isArray(books), 'Result should be an array') 56 | assert(books.length > 0, 'Should find at least one entity') 57 | assert(books[0].name, 'AdminService.Books', 'Should find AdminService.Books entity') 58 | 59 | // Check that keys are present and correct 60 | assert(books[0].elements.ID, 'Books entity should have key ID') 61 | assert(books[0].elements.ID.key === true, 'ID should be marked as key') 62 | }) 63 | 64 | test('search_model: draft fields for Books entity', async () => { 65 | const books = await tools.search_model.handler({ 66 | projectPath: sampleProjectPath, 67 | name: 'Books', 68 | kind: 'entity', 69 | topN: 2 70 | }) 71 | assert(Array.isArray(books), 'Result should be an array') 72 | assert(books.length > 0, 'Should find at least one entity') 73 | // Check draft fields 74 | assert(books[0].elements.IsActiveEntity, 'Draft-enabled entity should have IsActiveEntity') 75 | assert(books[0].elements.IsActiveEntity.key === true, 'IsActiveEntity should be marked as key') 76 | assert(books[0].elements.HasActiveEntity, 'Draft-enabled entity should have HasActiveEntity') 77 | assert(books[0].elements.HasDraftEntity, 'Draft-enabled entity should have HasDraftEntity') 78 | }) 79 | 80 | test('search_model: should list all entities (namesOnly)', async () => { 81 | const entities = await tools.search_model.handler({ 82 | projectPath: sampleProjectPath, 83 | kind: 'entity', 84 | topN: 100, 85 | namesOnly: true 86 | }) 87 | assert(Array.isArray(entities), 'Entities should be an array') 88 | assert(entities.length > 0, 'Should find at least one entity') 89 | assert(typeof entities[0] === 'string', 'Should return only names') 90 | }) 91 | 92 | test('search_model: should list all services (namesOnly)', async () => { 93 | const services = await tools.search_model.handler({ 94 | projectPath: sampleProjectPath, 95 | kind: 'service', 96 | topN: 100, 97 | namesOnly: true 98 | }) 99 | assert(Array.isArray(services), 'Services should be an array') 100 | assert(services.length > 0, 'Should find at least one service') 101 | assert(typeof services[0] === 'string', 'Should return only names') 102 | }) 103 | 104 | test('search_docs: should find docs', async () => { 105 | // Normal search 106 | const results = await tools.search_docs.handler({ 107 | query: 'how to create a new cap project', 108 | maxResults: 2 109 | }) 110 | assert(results.toLowerCase().includes('cds init'), 'Should contain the words cds init') 111 | }) 112 | 113 | test('search_docs: event mesh should mention enterprise-messaging', async () => { 114 | const meshResults = await tools.search_docs.handler({ 115 | query: 'event mesh config', 116 | maxResults: 10 117 | }) 118 | assert( 119 | meshResults.toLowerCase().includes('enterprise-messaging'), 120 | 'Should mention enterprise-messaging in the results' 121 | ) 122 | }) 123 | }) 124 | -------------------------------------------------------------------------------- /tests/searchMarkdownDocs.test.js: -------------------------------------------------------------------------------- 1 | import { fileURLToPath } from 'url' 2 | import path from 'path' 3 | const __dirname = path.dirname(fileURLToPath(import.meta.url)) 4 | 5 | import { test, describe } from 'node:test' 6 | import assert from 'node:assert' 7 | import fs from 'fs/promises' 8 | 9 | const embeddingsDir = path.join(__dirname, '..', 'embeddings') 10 | 11 | // Use dynamic import to ensure environment variable is set before module evaluation 12 | const searchMarkdownDocs = (await import('../lib/searchMarkdownDocs.js')).default 13 | 14 | describe('searchMarkdownDocs integration tests', () => { 15 | test('should download and load embeddings from server', async () => { 16 | // This test verifies the full download and search functionality 17 | const result = await searchMarkdownDocs('entity definition', 3) 18 | 19 | assert(typeof result === 'string', 'Result should be a string') 20 | assert(result.length > 0, 'Result should not be empty') 21 | assert(result.includes('---'), 'Result should contain separators between chunks') 22 | 23 | // Verify files were created 24 | const jsonExists = await fs 25 | .access(path.join(embeddingsDir, 'code-chunks.json')) 26 | .then(() => true) 27 | .catch(() => false) 28 | const binExists = await fs 29 | .access(path.join(embeddingsDir, 'code-chunks.bin')) 30 | .then(() => true) 31 | .catch(() => false) 32 | 33 | assert(jsonExists, 'JSON metadata file should exist after download') 34 | assert(binExists, 'Binary embeddings file should exist after download') 35 | }) 36 | 37 | test('should handle search queries and return relevant results', async () => { 38 | const queries = ['entity definition', 'service implementation', 'authentication', 'database schema'] 39 | 40 | for (const query of queries) { 41 | const result = await searchMarkdownDocs(query, 2) 42 | assert(typeof result === 'string', `Result for "${query}" should be a string`) 43 | assert(result.length > 0, `Result for "${query}" should not be empty`) 44 | 45 | const chunks = result.split('\n---\n') 46 | assert(chunks.length <= 2, `Should return at most 2 chunks for "${query}"`) 47 | } 48 | }) 49 | 50 | test('should use embeddings files consistently', async () => { 51 | // Get file stats before making calls 52 | const jsonPath = path.join(embeddingsDir, 'code-chunks.json') 53 | const binPath = path.join(embeddingsDir, 'code-chunks.bin') 54 | 55 | // Ensure files exist first 56 | await searchMarkdownDocs('test', 1) 57 | 58 | const jsonStatBefore = await fs.stat(jsonPath) 59 | const binStatBefore = await fs.stat(binPath) 60 | 61 | // Make several calls 62 | const result1 = await searchMarkdownDocs('entity', 1) 63 | const result2 = await searchMarkdownDocs('service', 1) 64 | 65 | // Check that files weren't modified (using cached files) 66 | const jsonStatAfter = await fs.stat(jsonPath) 67 | const binStatAfter = await fs.stat(binPath) 68 | 69 | assert(typeof result1 === 'string', 'First result should be a string') 70 | assert(typeof result2 === 'string', 'Second result should be a string') 71 | assert(result1.length > 0, 'First result should not be empty') 72 | assert(result2.length > 0, 'Second result should not be empty') 73 | 74 | // Files should have same modification time (not re-downloaded) 75 | assert.strictEqual( 76 | jsonStatBefore.mtime.getTime(), 77 | jsonStatAfter.mtime.getTime(), 78 | 'JSON file should not be re-downloaded' 79 | ) 80 | assert.strictEqual( 81 | binStatBefore.mtime.getTime(), 82 | binStatAfter.mtime.getTime(), 83 | 'Binary file should not be re-downloaded' 84 | ) 85 | }) 86 | test('should reuse downloaded files on subsequent calls', async () => { 87 | // First call - downloads embeddings 88 | const result1 = await searchMarkdownDocs('entity', 1) 89 | 90 | // Verify files exist 91 | const jsonExists = await fs 92 | .access(path.join(embeddingsDir, 'code-chunks.json')) 93 | .then(() => true) 94 | .catch(() => false) 95 | const binExists = await fs 96 | .access(path.join(embeddingsDir, 'code-chunks.bin')) 97 | .then(() => true) 98 | .catch(() => false) 99 | 100 | assert(jsonExists, 'JSON file should exist') 101 | assert(binExists, 'Binary file should exist') 102 | 103 | // Second call - should use existing files 104 | const result2 = await searchMarkdownDocs('service', 1) 105 | assert(typeof result1 === 'string', 'First result should be a string') 106 | assert(typeof result2 === 'string', 'Second result should be a string') 107 | assert(result1.length > 0, 'First result should not be empty') 108 | assert(result2.length > 0, 'Second result should not be empty') 109 | }) 110 | 111 | test('should respect maxResults parameter', async () => { 112 | const maxResults = 5 113 | const result = await searchMarkdownDocs('entity service', maxResults) 114 | 115 | const chunks = result.split('\n---\n') 116 | assert(chunks.length <= maxResults, `Should return at most ${maxResults} chunks`) 117 | 118 | // Test with different maxResults values 119 | for (const max of [1, 3, 10]) { 120 | const limitedResult = await searchMarkdownDocs('cds model', max) 121 | const limitedChunks = limitedResult.split('\n---\n') 122 | assert(limitedChunks.length <= max, `Should return at most ${max} chunks`) 123 | } 124 | }) 125 | }) 126 | -------------------------------------------------------------------------------- /lib/embeddings.js: -------------------------------------------------------------------------------- 1 | import fs from 'fs/promises' 2 | import path from 'path' 3 | import { fileURLToPath } from 'url' 4 | import calculateEmbeddings from './calculateEmbeddings.js' 5 | const __dirname = path.dirname(fileURLToPath(import.meta.url)) 6 | 7 | export async function loadChunks(id, dir = path.join(__dirname, '..', 'embeddings')) { 8 | function _throwCorruptedError() { 9 | const error = new Error('Corrupted files') 10 | error.code = 'EMBEDDINGS_CORRUPTED' 11 | throw error 12 | } 13 | 14 | try { 15 | const metaPath = path.join(dir, `${id}.json`) 16 | const binPath = path.join(dir, `${id}.bin`) 17 | 18 | // Read and parse JSON metadata 19 | const metaRaw = await fs.readFile(metaPath, 'utf-8') 20 | 21 | let meta 22 | try { 23 | meta = JSON.parse(metaRaw) 24 | } catch { 25 | _throwCorruptedError() 26 | } 27 | const { dim, chunks, count } = meta 28 | 29 | // Validate metadata structure 30 | if (!dim || !chunks || !Array.isArray(chunks)) { 31 | _throwCorruptedError() 32 | } 33 | 34 | if (count !== undefined && count !== chunks.length) { 35 | _throwCorruptedError() 36 | } 37 | 38 | // Read binary data 39 | const buffer = await fs.readFile(binPath) 40 | const expectedSize = chunks.length * dim * 4 // Float32 = 4 bytes 41 | 42 | if (buffer.length !== expectedSize) { 43 | _throwCorruptedError() 44 | } 45 | 46 | let flatEmbeddings 47 | try { 48 | flatEmbeddings = new Float32Array(buffer.buffer, buffer.byteOffset, buffer.length / 4) 49 | } catch { 50 | _throwCorruptedError() 51 | } 52 | 53 | // Validate that we can create embeddings without errors 54 | const result = chunks.map((content, i) => { 55 | if (typeof content !== 'string') { 56 | _throwCorruptedError() 57 | } 58 | 59 | const startIndex = i * dim 60 | const endIndex = (i + 1) * dim 61 | 62 | if (startIndex >= flatEmbeddings.length || endIndex > flatEmbeddings.length) { 63 | _throwCorruptedError() 64 | } 65 | 66 | const embeddings = flatEmbeddings.slice(startIndex, endIndex) 67 | 68 | // Check for NaN or infinite values 69 | for (let j = 0; j < embeddings.length; j++) { 70 | if (!isFinite(embeddings[j])) { 71 | _throwCorruptedError() 72 | } 73 | } 74 | 75 | return { content: content, embeddings } 76 | }) 77 | 78 | return result 79 | } catch (error) { 80 | // If it's a corruption error, delete files and re-throw 81 | if (error.code === 'EMBEDDINGS_CORRUPTED') { 82 | // Delete corrupted files 83 | const metaPath = path.join(dir, `${id}.json`) 84 | const binPath = path.join(dir, `${id}.bin`) 85 | const etagPath = path.join(dir, `${id}.etag`) 86 | 87 | await Promise.all([ 88 | fs.unlink(metaPath).catch(() => {}), 89 | fs.unlink(binPath).catch(() => {}), 90 | fs.unlink(etagPath).catch(() => {}) 91 | ]) 92 | 93 | throw error 94 | } 95 | 96 | // For other errors (file not found, etc.), just re-throw 97 | throw error 98 | } 99 | } 100 | 101 | export async function getEmbeddings(text) { 102 | const res = await calculateEmbeddings(text) 103 | return res 104 | } 105 | 106 | export async function searchEmbeddings(query, chunks) { 107 | const search = await getEmbeddings(query) 108 | // Compute similarity for all chunks 109 | const scoredChunks = chunks.map(chunk => ({ 110 | ...chunk, 111 | similarity: cosineSimilarity(search, chunk.embeddings) 112 | })) 113 | // Sort by similarity descending 114 | scoredChunks.sort((a, b) => b.similarity - a.similarity) 115 | return scoredChunks 116 | } 117 | 118 | // Only to be used in scripts, not in production 119 | export async function createEmbeddings(id, chunks, dir = path.join(__dirname, '..', 'embeddings')) { 120 | const embeddings = [] 121 | 122 | for (let i = 0; i < chunks.length; i++) { 123 | const embedding = await getEmbeddings(chunks[i]) 124 | embeddings.push(embedding) 125 | } 126 | 127 | await saveEmbeddings(id, chunks, embeddings, dir) 128 | } 129 | 130 | async function saveEmbeddings(id, chunks, embeddings, dir) { 131 | if (!chunks.length) throw new Error('No chunks to save') 132 | if (!embeddings || !embeddings.length) throw new Error('No embeddings to save') 133 | if (chunks.length !== embeddings.length) throw new Error('Chunks and embeddings length mismatch') 134 | 135 | const dim = embeddings[0].length 136 | const count = chunks.length 137 | 138 | // Ensure directory exists 139 | await fs.mkdir(dir, { recursive: true }) 140 | 141 | // Flatten embeddings 142 | const embeddingsPath = path.join(dir, `${id}.bin`) 143 | const metaPath = path.join(dir, `${id}.json`) 144 | 145 | try { 146 | await fs.unlink(embeddingsPath) 147 | } catch (err) { 148 | if (err.code !== 'ENOENT') throw err // Ignore if file doesn't exist 149 | } 150 | 151 | try { 152 | await fs.unlink(metaPath) 153 | } catch (err) { 154 | if (err.code !== 'ENOENT') throw err 155 | } 156 | 157 | const flatEmbeddings = new Float32Array(count * dim) 158 | 159 | embeddings.forEach((embedding, i) => { 160 | if (!(embedding instanceof Float32Array)) { 161 | throw new Error(`Embedding ${i} must be a Float32Array`) 162 | } 163 | if (embedding.length !== dim) { 164 | throw new Error(`All embeddings must have same length (embedding ${i} mismatch)`) 165 | } 166 | flatEmbeddings.set(embedding, i * dim) 167 | }) 168 | 169 | // Save embeddings binary 170 | await fs.writeFile(embeddingsPath, Buffer.from(flatEmbeddings.buffer)) 171 | 172 | // Save metadata (chunks without embeddings) 173 | const meta = { dim, count, chunks } 174 | await fs.writeFile(metaPath, JSON.stringify(meta, null, 2)) 175 | } 176 | 177 | function cosineSimilarity(a, b) { 178 | const dot = a.reduce((sum, val, i) => sum + val * b[i], 0) 179 | const normA = Math.sqrt(a.reduce((sum, val) => sum + val * val, 0)) 180 | const normB = Math.sqrt(b.reduce((sum, val) => sum + val * val, 0)) 181 | return dot / (normA * normB) 182 | } 183 | -------------------------------------------------------------------------------- /lib/getModel.js: -------------------------------------------------------------------------------- 1 | import cds from '@sap/cds' 2 | import fs from 'fs' 3 | import path from 'path' 4 | 5 | cds.log.Logger = () => { 6 | return { 7 | trace: () => {}, 8 | debug: () => {}, 9 | log: () => {}, 10 | info: () => {}, 11 | warn: () => {}, 12 | error: () => {} 13 | } 14 | } 15 | 16 | // Ensures only one CDS model compilation is ever in-flight. 17 | // The moment getModel is called, cds.model is set to a promise. 18 | export default async function getModel(projectPath) { 19 | if (cds.model) { 20 | // If cds.model is a promise, await it; if it's resolved, return it 21 | if (typeof cds.model.then === 'function') await cds.model 22 | return cds.model 23 | } 24 | // Assign a promise immediately to cds.model to prevent duplicate compilations 25 | cds.model = (async () => { 26 | const compiled = await compileModel(projectPath) 27 | cds.model = compiled 28 | return compiled 29 | })() 30 | 31 | try { 32 | await cds.model 33 | } catch (e) { 34 | cds.model = undefined 35 | throw e 36 | } 37 | return cds.model 38 | } 39 | 40 | // Loads and compiles the CDS model, returns the compiled model or throws on error 41 | async function compileModel(projectPath) { 42 | cds.root = projectPath 43 | const startTime = Date.now() 44 | const resolved = cds.resolve(projectPath + '/*', { cache: {} }) // use CAP standard resolution for model compilation 45 | if (!resolved) { 46 | throw new Error(`No CDS files in path: ${projectPath}`) 47 | } 48 | let compiled = await cds.load(resolved, { docs: true, locations: true }) 49 | if (!compiled || (Array.isArray(compiled) && compiled.length === 0)) { 50 | throw new Error(`Failed to load CDS model from path: ${projectPath}`) 51 | } 52 | if (!compiled.definitions || Object.keys(compiled.definitions).length === 0) { 53 | throw new Error(`Compiled CDS model is invalid or empty for path: ${projectPath}`) 54 | } 55 | compiled = cds.compile.for.nodejs(compiled) // to include drafts, show effective types 56 | const serviceInfo = cds.compile.to.serviceinfo(compiled) 57 | 58 | // merge with definitions 59 | for (const info of serviceInfo) { 60 | const def = compiled.definitions[info.name] 61 | Object.assign(def, info) 62 | } 63 | 64 | for (const name in compiled.definitions) { 65 | Object.defineProperty(compiled.definitions[name], 'name', { 66 | value: name, 67 | enumerable: true 68 | }) 69 | } 70 | 71 | const _entities_in = service => { 72 | const exposed = [], 73 | { entities } = service 74 | for (let each in entities) { 75 | const e = entities[each] 76 | if (e['@cds.autoexposed'] && !e['@cds.autoexpose']) continue 77 | if (/DraftAdministrativeData$/.test(e.name)) continue 78 | if (/[._]texts$/.test(e.name)) continue 79 | if (cds.env.effective.odata.containment && service.definition._containedEntities.has(e.name)) continue 80 | exposed.push(each) 81 | } 82 | return exposed 83 | } 84 | 85 | compiled.services.forEach(srv => { 86 | const entities = _entities_in(srv) 87 | srv.exposedEntities = entities.map(e => srv.name + '.' + e) 88 | if (srv.endpoints) 89 | srv.endpoints.forEach(endpoint => { 90 | for (const e of entities) { 91 | const path = endpoint.path + e.replace(/\./g, '_') 92 | const def = compiled.definitions[srv.name + '.' + e] 93 | def.endpoints ??= [] 94 | def.endpoints.push({ kind: endpoint.kind, path }) 95 | } 96 | }) 97 | }) 98 | 99 | const endTime = Date.now() 100 | const compileDuration = endTime - startTime 101 | 102 | // Only do it once 103 | if (!changeWatcher) { 104 | const intervalMs = process.env.CDS_MCP_REFRESH_MS 105 | ? parseInt(process.env.CDS_MCP_REFRESH_MS, 10) 106 | : Math.max(compileDuration * 10, 20000) 107 | changeWatcher = setInterval(async () => { 108 | const hasChanged = await cdsFilesChanged(projectPath) 109 | if (hasChanged) { 110 | await refreshModel(projectPath) 111 | } 112 | }, intervalMs).unref() // Uses CDS_MCP_REFRESH_MS if set, otherwise defaults to 10x compile duration or 20s 113 | } 114 | return compiled 115 | } 116 | 117 | // Refreshes the CDS model, only replaces cds.model if compilation succeeds 118 | async function refreshModel(projectPath) { 119 | try { 120 | const compiled = await compileModel(projectPath) 121 | cds.model = compiled 122 | return compiled 123 | } catch { 124 | // If anything goes wrong, cds.model remains untouched 125 | } 126 | } 127 | 128 | // Global cache object for CDS file timestamps 129 | const cache = { cdsFiles: new Map() } 130 | let changeWatcher = null 131 | 132 | async function cdsFilesChanged(projectPath) { 133 | // Recursively find all .cds files under root, ignoring node_modules 134 | async function findCdsFiles(dir) { 135 | const entries = await fs.promises.readdir(dir, { withFileTypes: true }) 136 | const promises = entries.map(async entry => { 137 | const fullPath = path.join(dir, entry.name) 138 | if (entry.isDirectory()) { 139 | if (entry.name === 'node_modules') return [] 140 | return await findCdsFiles(fullPath) 141 | } else if (entry.isFile() && entry.name.endsWith('.cds')) { 142 | return [fullPath] 143 | } else { 144 | return [] 145 | } 146 | }) 147 | const results = await Promise.all(promises) 148 | return results.flat() 149 | } 150 | 151 | if (projectPath.endsWith('/')) projectPath = projectPath.slice(0, -1) 152 | const files = await findCdsFiles(projectPath) 153 | const currentTimestamps = new Map() 154 | await Promise.all( 155 | files.map(file => 156 | fs.promises 157 | .stat(file) 158 | .then(stat => { 159 | currentTimestamps.set(file, stat.mtimeMs) 160 | }) 161 | .catch(() => { 162 | /* File might have been deleted between resolve and stat */ 163 | }) 164 | ) 165 | ) 166 | 167 | const _hasChanged = () => { 168 | if (currentTimestamps.size !== cache.cdsFiles.size) { 169 | return true 170 | } 171 | // Check for changed timestamps 172 | for (const f of files) { 173 | const prev = cache.cdsFiles.get(f) 174 | const curr = currentTimestamps.get(f) 175 | if (prev !== curr) { 176 | return true 177 | } 178 | } 179 | } 180 | if (_hasChanged()) { 181 | cache.cdsFiles = currentTimestamps 182 | return true 183 | } 184 | return false 185 | } 186 | -------------------------------------------------------------------------------- /tests/sample/app/common.cds: -------------------------------------------------------------------------------- 1 | /* 2 | Common Annotations shared by all apps 3 | */ 4 | 5 | using { sap.capire.bookshop as my } from '../db/schema'; 6 | using { sap.common, sap.common.Currencies } from '@sap/cds/common'; 7 | 8 | //////////////////////////////////////////////////////////////////////////// 9 | // 10 | // Books Lists 11 | // 12 | annotate my.Books with @( 13 | Common.SemanticKey: [ID], 14 | UI: { 15 | Identification: [{ Value: title }], 16 | SelectionFields: [ 17 | ID, 18 | author_ID, 19 | price, 20 | currency_code 21 | ], 22 | LineItem: [ 23 | { Value: ID, Label: '{i18n>Title}' }, 24 | { Value: author.ID, Label: '{i18n>Author}' }, 25 | { Value: genre.name }, 26 | { Value: stock }, 27 | { Value: price }, 28 | { Value: currency.symbol }, 29 | ] 30 | } 31 | ) { 32 | ID @Common: { 33 | SemanticObject: 'Books', 34 | Text: title, 35 | TextArrangement: #TextOnly 36 | }; 37 | author @ValueList.entity: 'Authors'; 38 | }; 39 | 40 | annotate Currencies with { 41 | symbol @Common.Label: '{i18n>Currency}'; 42 | } 43 | 44 | 45 | //////////////////////////////////////////////////////////////////////////// 46 | // 47 | // Books Elements 48 | // 49 | annotate my.Books with { 50 | ID @title: '{i18n>ID}'; 51 | title @title: '{i18n>Title}'; 52 | genre @title: '{i18n>Genre}' @Common: { Text: genre.name, TextArrangement: #TextOnly }; 53 | author @title: '{i18n>Author}' @Common: { Text: author.name, TextArrangement: #TextOnly }; 54 | price @title: '{i18n>Price}' @Measures.ISOCurrency: currency_code; 55 | stock @title: '{i18n>Stock}'; 56 | descr @title: '{i18n>Description}' @UI.MultiLineText; 57 | image @title: '{i18n>Image}'; 58 | } 59 | 60 | //////////////////////////////////////////////////////////////////////////// 61 | // 62 | // Genres List 63 | // 64 | annotate my.Genres with @( 65 | Common.SemanticKey: [name], 66 | UI: { 67 | SelectionFields: [name], 68 | LineItem: [ 69 | { Value: name }, 70 | { 71 | Value: parent.name, 72 | Label: 'Main Genre' 73 | }, 74 | ], 75 | } 76 | ); 77 | 78 | annotate my.Genres with { 79 | ID @Common.Text : name @Common.TextArrangement : #TextOnly; 80 | } 81 | 82 | //////////////////////////////////////////////////////////////////////////// 83 | // 84 | // Genre Details 85 | // 86 | annotate my.Genres with @(UI : { 87 | Identification: [{ Value: name}], 88 | HeaderInfo: { 89 | TypeName : '{i18n>Genre}', 90 | TypeNamePlural: '{i18n>Genres}', 91 | Title : { Value: name }, 92 | Description : { Value: ID } 93 | }, 94 | Facets: [{ 95 | $Type : 'UI.ReferenceFacet', 96 | Label : '{i18n>SubGenres}', 97 | Target: 'children/@UI.LineItem' 98 | }, ], 99 | }); 100 | 101 | //////////////////////////////////////////////////////////////////////////// 102 | // 103 | // Genres Elements 104 | // 105 | annotate my.Genres with { 106 | ID @title: '{i18n>ID}'; 107 | name @title: '{i18n>Genre}'; 108 | } 109 | 110 | //////////////////////////////////////////////////////////////////////////// 111 | // 112 | // Authors List 113 | // 114 | annotate my.Authors with @( 115 | Common.SemanticKey: [ID], 116 | UI: { 117 | Identification : [{ Value: name}], 118 | SelectionFields: [ name ], 119 | LineItem : [ 120 | { Value: ID }, 121 | { Value: dateOfBirth }, 122 | { Value: dateOfDeath }, 123 | { Value: placeOfBirth }, 124 | { Value: placeOfDeath }, 125 | ], 126 | } 127 | ) { 128 | ID @Common: { 129 | SemanticObject: 'Authors', 130 | Text: name, 131 | TextArrangement: #TextOnly, 132 | }; 133 | }; 134 | 135 | //////////////////////////////////////////////////////////////////////////// 136 | // 137 | // Author Details 138 | // 139 | annotate my.Authors with @(UI : { 140 | HeaderInfo: { 141 | TypeName : '{i18n>Author}', 142 | TypeNamePlural: '{i18n>Authors}', 143 | Title : { Value: name }, 144 | Description : { Value: dateOfBirth } 145 | }, 146 | Facets: [{ 147 | $Type : 'UI.ReferenceFacet', 148 | Target: 'books/@UI.LineItem' 149 | }], 150 | }); 151 | 152 | 153 | //////////////////////////////////////////////////////////////////////////// 154 | // 155 | // Authors Elements 156 | // 157 | annotate my.Authors with { 158 | ID @title: '{i18n>ID}'; 159 | name @title: '{i18n>Name}'; 160 | dateOfBirth @title: '{i18n>DateOfBirth}'; 161 | dateOfDeath @title: '{i18n>DateOfDeath}'; 162 | placeOfBirth @title: '{i18n>PlaceOfBirth}'; 163 | placeOfDeath @title: '{i18n>PlaceOfDeath}'; 164 | } 165 | 166 | //////////////////////////////////////////////////////////////////////////// 167 | // 168 | // Languages List 169 | // 170 | annotate common.Languages with @( 171 | Common.SemanticKey: [code], 172 | Identification: [{ Value: code }], 173 | UI: { 174 | SelectionFields: [ name, descr ], 175 | LineItem: [ 176 | { Value: code }, 177 | { Value: name }, 178 | ], 179 | } 180 | ); 181 | 182 | //////////////////////////////////////////////////////////////////////////// 183 | // 184 | // Language Details 185 | // 186 | annotate common.Languages with @(UI : { 187 | HeaderInfo: { 188 | TypeName : '{i18n>Language}', 189 | TypeNamePlural: '{i18n>Languages}', 190 | Title : { Value: name }, 191 | Description : { Value: descr } 192 | }, 193 | Facets: [{ 194 | $Type : 'UI.ReferenceFacet', 195 | Label : '{i18n>Details}', 196 | Target: '@UI.FieldGroup#Details' 197 | }, ], 198 | FieldGroup #Details: {Data : [ 199 | { Value: code }, 200 | { Value: name }, 201 | { Value: descr } 202 | ]}, 203 | }); 204 | 205 | //////////////////////////////////////////////////////////////////////////// 206 | // 207 | // Currencies List 208 | // 209 | annotate common.Currencies with @( 210 | Common.SemanticKey: [code], 211 | Identification: [{ Value: code}], 212 | UI: { 213 | SelectionFields: [ 214 | name, 215 | descr 216 | ], 217 | LineItem: [ 218 | { Value: descr }, 219 | { Value: symbol }, 220 | { Value: code }, 221 | ], 222 | } 223 | ); 224 | 225 | //////////////////////////////////////////////////////////////////////////// 226 | // 227 | // Currency Details 228 | // 229 | annotate common.Currencies with @(UI : { 230 | HeaderInfo: { 231 | TypeName : '{i18n>Currency}', 232 | TypeNamePlural: '{i18n>Currencies}', 233 | Title : { Value: descr }, 234 | Description : { Value: code } 235 | }, 236 | Facets: [ 237 | { 238 | $Type : 'UI.ReferenceFacet', 239 | Label : '{i18n>Details}', 240 | Target: '@UI.FieldGroup#Details' 241 | } 242 | ], 243 | FieldGroup #Details: {Data : [ 244 | { Value: name }, 245 | { Value: symbol }, 246 | { Value: code }, 247 | { Value: descr } 248 | ]} 249 | }); 250 | -------------------------------------------------------------------------------- /tests/loadEmbeddings.test.js: -------------------------------------------------------------------------------- 1 | import { test, describe, beforeEach, afterEach } from 'node:test' 2 | import assert from 'node:assert' 3 | import fs from 'fs/promises' 4 | import path from 'path' 5 | import { fileURLToPath } from 'url' 6 | import { loadChunks } from '../lib/embeddings.js' 7 | 8 | const __dirname = path.dirname(fileURLToPath(import.meta.url)) 9 | const TEST_EMBEDDINGSDIR = path.join(__dirname, 'temp-embeddings') 10 | 11 | describe('loadEmbeddings tests', () => { 12 | beforeEach(async () => { 13 | await fs.rm(TEST_EMBEDDINGSDIR, { recursive: true, force: true }) 14 | }) 15 | 16 | afterEach(async () => { 17 | await fs.rm(TEST_EMBEDDINGSDIR, { recursive: true, force: true }) 18 | }) 19 | 20 | test('should handle missing embedding files', async () => { 21 | // Try to load chunks from non-existent directory 22 | await assert.rejects(loadChunks('nonexistent', TEST_EMBEDDINGSDIR), err => err.code === 'ENOENT') 23 | }) 24 | 25 | test('should handle corrupted JSON metadata', async () => { 26 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 27 | 28 | // Create corrupted JSON file 29 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), 'invalid json content') 30 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(new Float32Array([1, 2, 3, 4]))) 31 | 32 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 33 | 34 | // Verify corrupted files were cleaned up 35 | const jsonExists = await fs 36 | .access(path.join(TEST_EMBEDDINGSDIR, 'code.json')) 37 | .then(() => true) 38 | .catch(() => false) 39 | const binExists = await fs 40 | .access(path.join(TEST_EMBEDDINGSDIR, 'code.bin')) 41 | .then(() => true) 42 | .catch(() => false) 43 | assert.strictEqual(jsonExists, false) 44 | assert.strictEqual(binExists, false) 45 | }) 46 | 47 | test('should handle malformed JSON structure', async () => { 48 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 49 | 50 | // Create JSON with missing required fields 51 | const badMeta = { chunks: ['test'] } // Missing dim 52 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(badMeta)) 53 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(new Float32Array([1, 2, 3, 4]))) 54 | 55 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 56 | }) 57 | 58 | test('should handle mismatched binary file size', async () => { 59 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 60 | 61 | // Create metadata expecting 4 dimensions but binary has wrong size 62 | const meta = { dim: 4, count: 2, chunks: ['test1', 'test2'] } 63 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(meta)) 64 | 65 | // Binary should be 2 chunks * 4 dims * 4 bytes = 32 bytes, but provide less 66 | const wrongSizeBinary = new Float32Array([1, 2, 3]) // Only 12 bytes 67 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(wrongSizeBinary.buffer)) 68 | 69 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 70 | }) 71 | 72 | test('should handle count mismatch in metadata', async () => { 73 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 74 | 75 | // Create metadata with mismatched count 76 | const meta = { dim: 2, count: 5, chunks: ['test1', 'test2'] } // count != chunks.length 77 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(meta)) 78 | 79 | const binary = new Float32Array([1, 2, 3, 4]) // 2 chunks * 2 dims 80 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(binary.buffer)) 81 | 82 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 83 | }) 84 | 85 | test('should handle NaN values in embeddings', async () => { 86 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 87 | 88 | const meta = { dim: 2, count: 1, chunks: ['test'] } 89 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(meta)) 90 | 91 | // Create binary with NaN values 92 | const binary = new Float32Array([NaN, 2.0]) 93 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(binary.buffer)) 94 | 95 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 96 | }) 97 | 98 | test('should handle Infinity values in embeddings', async () => { 99 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 100 | 101 | const meta = { dim: 2, count: 1, chunks: ['test'] } 102 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(meta)) 103 | 104 | // Create binary with Infinity values 105 | const binary = new Float32Array([Infinity, 2.0]) 106 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(binary.buffer)) 107 | 108 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 109 | }) 110 | 111 | test('should load valid embeddings correctly', async () => { 112 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 113 | 114 | const chunks = ['Hello world', 'Test content'] 115 | const meta = { dim: 3, count: 2, chunks } 116 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(meta)) 117 | 118 | // Create valid binary data 119 | const binary = new Float32Array([ 120 | 1.0, 121 | 2.0, 122 | 3.0, // First chunk embeddings 123 | 4.0, 124 | 5.0, 125 | 6.0 // Second chunk embeddings 126 | ]) 127 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(binary.buffer)) 128 | 129 | const result = await loadChunks('code', TEST_EMBEDDINGSDIR) 130 | 131 | assert.strictEqual(result.length, 2) 132 | assert.strictEqual(result[0].content, 'Hello world') 133 | assert.strictEqual(result[1].content, 'Test content') 134 | 135 | // Check embeddings 136 | assert.deepStrictEqual(Array.from(result[0].embeddings), [1.0, 2.0, 3.0]) 137 | assert.deepStrictEqual(Array.from(result[1].embeddings), [4.0, 5.0, 6.0]) 138 | }) 139 | 140 | test('should handle non-string chunk content', async () => { 141 | await fs.mkdir(TEST_EMBEDDINGSDIR, { recursive: true }) 142 | 143 | const meta = { dim: 2, count: 1, chunks: [123] } // Non-string content 144 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.json'), JSON.stringify(meta)) 145 | 146 | const binary = new Float32Array([1.0, 2.0]) 147 | await fs.writeFile(path.join(TEST_EMBEDDINGSDIR, 'code.bin'), Buffer.from(binary.buffer)) 148 | 149 | await assert.rejects(loadChunks('code', TEST_EMBEDDINGSDIR), err => err.code === 'EMBEDDINGS_CORRUPTED') 150 | }) 151 | }) 152 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Welcome to @cap-js/mcp-server 2 | 3 | [![REUSE status](https://api.reuse.software/badge/github.com/cap-js/mcp-server)](https://api.reuse.software/info/github.com/cap-js/mcp-server) 4 | 5 | 6 | 7 | ## About This Project 8 | 9 | A Model Context Protocol (MCP) server for the [SAP Cloud Application Programming Model (CAP)](https://cap.cloud.sap). 10 | Use it for AI-assisted development of CAP applications (_agentic coding_). 11 | 12 | The server helps AI models answer questions such as: 13 | - _Which CDS services are in this project, and where are they served?_ 14 | - _What are the entities about and how do they relate?_ 15 | - _How do I add columns to a select statement in CAP Node.js?_ 16 | 17 | 18 | 19 | ## Table of Contents 20 | 21 | - [About This Project](#about-this-project) 22 | - [Requirements](#requirements) 23 | - [Setup](#setup) 24 | - [Usage in VS Code](#usage-in-vs-code) 25 | - [Usage in opencode](#usage-in-opencode) 26 | - [CLI Usage](#cli-usage) 27 | - [Available Tools](#available-tools) 28 | - [`search_model`](#search_model) 29 | - [`search_docs`](#search_docs) 30 | - [Support, Feedback, Contributing](#support-feedback-contributing) 31 | - [Security / Disclosure](#security--disclosure) 32 | - [Code of Conduct](#code-of-conduct) 33 | - [Licensing](#licensing) 34 | - [Acknowledgments](#acknowledgments) 35 | 36 | 37 | 38 | ## Requirements 39 | 40 | See [Getting Started](https://cap.cloud.sap/docs/get-started) on how to jumpstart your development and grow as you go with SAP Cloud Application Programming Model. 41 | 42 | 43 | 44 | ## Setup 45 | 46 | Configure your MCP client (Cline, opencode, Claude Code, GitHub Copilot, etc.) to start the server using the command `npx -y @cap-js/mcp-server` as in the following examples. 47 | 48 | ### Usage in VS Code 49 | 50 | Example for VS Code extension [Cline](https://marketplace.visualstudio.com/items?itemName=saoudrizwan.claude-dev): 51 | ```json 52 | { 53 | "mcpServers": { 54 | "cds-mcp": { 55 | "command": "npx", 56 | "args": ["-y", "@cap-js/mcp-server"], 57 | "env": {} 58 | } 59 | } 60 | } 61 | ``` 62 | 63 | Example for VS Code global [mcp.json](https://code.visualstudio.com/docs/copilot/customization/mcp-servers): 64 | > Note: GitHub Copilot uses the `mcp.json` file as source for it's Agent mode. 65 | ```json 66 | { 67 | "servers": { 68 | "cds-mcp": { 69 | "command": "npx", 70 | "args": ["-y", "@cap-js/mcp-server"], 71 | "env": {}, 72 | "type": "stdio" 73 | }, 74 | "inputs": [] 75 | } 76 | } 77 | ``` 78 | 79 | See [VS Code Marketplace](https://marketplace.visualstudio.com/search?term=tag%3Aagent&target=VSCode&category=All%20categories&sortBy=Relevance) for more agent extensions. 80 | 81 | ### Usage in opencode 82 | 83 | Example for [opencode](https://github.com/sst/opencode): 84 | ```json 85 | { 86 | "mcp": { 87 | "cds-mcp": { 88 | "type": "local", 89 | "command": ["npx", "-y", "@cap-js/mcp-server"], 90 | "enabled": true 91 | } 92 | } 93 | } 94 | ``` 95 | 96 | ### Rules 97 | 98 | The following rules help the LLM use the server correctly: 99 | 100 | ```markdown 101 | - You MUST search for CDS definitions, like entities, fields and services (which include HTTP endpoints) with cds-mcp, only if it fails you MAY read \*.cds files in the project. 102 | - You MUST search for CAP docs with cds-mcp EVERY TIME you create, modify CDS models or when using APIs or the `cds` CLI from CAP. Do NOT propose, suggest or make any changes without first checking it. 103 | ``` 104 | 105 | Add these rules to your existing global or project-specific [`AGENTS.md`](https://agents.md/) (specifics may vary based on respective MCP client). 106 | 107 | ### CLI Usage 108 | 109 | You can also use the tools directly from the command line. 110 | 111 | ```sh 112 | npm i -g @cap-js/mcp-server 113 | ``` 114 | 115 | This will provide the command `cds-mcp`, with which you can invoke the tools directly as follows. 116 | 117 | ```sh 118 | # Search for CDS model definitions 119 | cds-mcp search_model . Books entity 120 | 121 | # Search CAP documentation 122 | cds-mcp search_docs "how to add columns to a select statement in CAP Node.js" 1 123 | ``` 124 | 125 | ## Available Tools 126 | 127 | > [!NOTE] 128 | > Tools are meant to be used by AI models and do not constitute a stable API. 129 | 130 | The server provides these tools for CAP development: 131 | 132 | ### `search_model` 133 | 134 | This tool performs fuzzy searches against names of definitions from the compiled CDS model (Core Schema Notation). 135 | CDS compiles all your `.cds` files into a unified model representation that includes: 136 | - All definitions and their relationships 137 | - Annotations 138 | - HTTP endpoints 139 | 140 | The fuzzy search algorithm matches definition names and allows for partial matches, making it easy to find entities like "Books" even when searching for "book". 141 | 142 | ### `search_docs` 143 | 144 | This tool uses vector embeddings to locally search through preprocessed CAP documentation, stored as embeddings. The process works as follows: 145 | 146 | 1. **Query processing:** Your search query is converted to an embedding vector. 147 | 2. **Similarity search:** The system finds documentation chunks with the highest semantic similarity to your query. 148 | 149 | This semantic search approach enables you to find relevant documentation even when your query does not use the exact keywords found in the docs, all locally on your machine. 150 | 151 | 152 | ## Support, Feedback, Contributing 153 | 154 | This project is open to feature requests/suggestions, bug reports, and so on, via [GitHub issues](https://github.com/cap-js/mcp-server/issues). Contribution and feedback are encouraged and always welcome. For more information about how to contribute, the project structure, as well as additional contribution information, see our [Contribution Guidelines](CONTRIBUTING.md). 155 | 156 | 157 | 158 | ## Security / Disclosure 159 | 160 | If you find any bug that may be a security problem, please follow our instructions at [in our security policy](https://github.com/cap-js/mcp-server/security/policy) on how to report it. Please don't create GitHub issues for security-related doubts or problems. 161 | 162 | 163 | 164 | ## Code of Conduct 165 | 166 | We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone. By participating in this project, you agree to abide by its [Code of Conduct](https://github.com/cap-js/.github/blob/main/CODE_OF_CONDUCT.md) at all times. 167 | 168 | 169 | 170 | ## Licensing 171 | 172 | Copyright 2025 SAP SE or an SAP affiliate company and @cap-js/cds-mcp contributors. Please see our [LICENSE](LICENSE) for copyright and license information. Detailed information including third-party components and their licensing/copyright information is available [via the REUSE tool](https://api.reuse.software/info/github.com/cap-js/mcp-server). 173 | 174 | 175 | 176 | ## Acknowledgments 177 | 178 | - **onnxruntime-web** is used for creating embeddings locally. 179 | - **@huggingface/transformers.js** is used to compare the output of the WordPiece tokenizer. 180 | - **@modelcontextprotocol/sdk** provides the SDK for MCP. 181 | -------------------------------------------------------------------------------- /LICENSES/Apache-2.0.txt: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. 10 | 11 | "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. 12 | 13 | "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. 60 | 61 | Copyright [yyyy] [name of copyright owner] 62 | 63 | Licensed under the Apache License, Version 2.0 (the "License"); 64 | you may not use this file except in compliance with the License. 65 | You may obtain a copy of the License at 66 | 67 | http://www.apache.org/licenses/LICENSE-2.0 68 | 69 | Unless required by applicable law or agreed to in writing, software 70 | distributed under the License is distributed on an "AS IS" BASIS, 71 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 72 | See the License for the specific language governing permissions and 73 | limitations under the License. 74 | -------------------------------------------------------------------------------- /tests/embeddings.test.js: -------------------------------------------------------------------------------- 1 | import { test, before } from 'node:test' 2 | import assert from 'node:assert' 3 | import fs from 'fs' 4 | import path from 'path' 5 | import { fileURLToPath } from 'url' 6 | import { getEmbeddings } from '../lib/embeddings.js' 7 | import calculateEmbeddings from '../lib/calculateEmbeddings.js' 8 | 9 | const __dirname = path.dirname(fileURLToPath(import.meta.url)) 10 | const MODEL_DIR = path.resolve(__dirname, '..', 'models') 11 | const REQUIRED_FILES = ['model.onnx', 'tokenizer.json', 'tokenizer_config.json'] 12 | 13 | test.describe('embeddings', () => { 14 | // Pre-download models once at the start to speed up all tests 15 | before(async () => { 16 | await calculateEmbeddings('initialization test') 17 | }) 18 | test('should create embeddings for a test string', async () => { 19 | const results = await getEmbeddings('Node.js testing') 20 | assert(results.length, 'Results should be an array') 21 | }) 22 | 23 | test('should verify model files are downloaded correctly', async () => { 24 | // Models should already be downloaded in the before() hook 25 | // Check that model directory exists 26 | assert(fs.existsSync(MODEL_DIR), 'Model directory should exist after initialization') 27 | 28 | // Check that all required files exist 29 | for (const file of REQUIRED_FILES) { 30 | const filePath = path.join(MODEL_DIR, file) 31 | assert(fs.existsSync(filePath), `Required model file ${file} should exist`) 32 | 33 | // Check that files are not empty 34 | const stats = fs.statSync(filePath) 35 | assert(stats.size > 0, `Model file ${file} should not be empty`) 36 | } 37 | }) 38 | 39 | test('should verify model files have expected structure', async () => { 40 | // Models should already be available from before() hook 41 | // Check tokenizer.json structure 42 | const tokenizerPath = path.join(MODEL_DIR, 'tokenizer.json') 43 | const tokenizerData = JSON.parse(fs.readFileSync(tokenizerPath, 'utf-8')) 44 | 45 | assert(typeof tokenizerData === 'object', 'Tokenizer should be a valid JSON object') 46 | assert(tokenizerData.model, 'Tokenizer should have model property') 47 | assert(tokenizerData.model.vocab, 'Tokenizer should have vocab property') 48 | assert(typeof tokenizerData.model.vocab === 'object', 'Vocab should be an object') 49 | 50 | // Check tokenizer_config.json structure 51 | const configPath = path.join(MODEL_DIR, 'tokenizer_config.json') 52 | const configData = JSON.parse(fs.readFileSync(configPath, 'utf-8')) 53 | 54 | assert(typeof configData === 'object', 'Tokenizer config should be a valid JSON object') 55 | 56 | // Check ONNX model file 57 | const modelPath = path.join(MODEL_DIR, 'model.onnx') 58 | const modelStats = fs.statSync(modelPath) 59 | 60 | // ONNX files should be reasonably large (MiniLM model is typically several MB) 61 | assert(modelStats.size > 1000000, 'ONNX model file should be reasonably large (>1MB)') 62 | }) 63 | 64 | test('should verify calculateEmbeddings returns normalized embeddings', async () => { 65 | const testString = 'This is a test string for embedding verification' 66 | 67 | // Get embeddings from calculateEmbeddings 68 | const calculateEmbeddingsResult = await calculateEmbeddings(testString) 69 | 70 | // Should return an array or Float32Array 71 | assert( 72 | Array.isArray(calculateEmbeddingsResult) || calculateEmbeddingsResult instanceof Float32Array, 73 | 'calculateEmbeddings should return an array' 74 | ) 75 | 76 | // Should contain numeric values 77 | assert( 78 | calculateEmbeddingsResult.every(val => typeof val === 'number'), 79 | 'calculateEmbeddings should return numeric values' 80 | ) 81 | 82 | // Should return expected hidden size 83 | const hiddenSize = 384 // MiniLM-L6-v2 hidden size 84 | assert.strictEqual( 85 | calculateEmbeddingsResult.length, 86 | hiddenSize, 87 | 'calculateEmbeddings should return embedding of size 384' 88 | ) 89 | 90 | // Should be normalized (norm ≈ 1.0) 91 | let norm = 0 92 | for (let i = 0; i < hiddenSize; i++) { 93 | norm += calculateEmbeddingsResult[i] * calculateEmbeddingsResult[i] 94 | } 95 | norm = Math.sqrt(norm) 96 | 97 | assert(Math.abs(norm - 1.0) < 0.001, `calculateEmbeddings should be normalized (norm ≈ 1.0), got ${norm}`) 98 | }) 99 | 100 | test('should produce consistent embeddings for identical inputs', async () => { 101 | const testString = 'Consistent embedding test string' 102 | 103 | // Generate embeddings twice 104 | const embedding1 = await calculateEmbeddings(testString) 105 | const embedding2 = await calculateEmbeddings(testString) 106 | 107 | // Should have same length 108 | assert.strictEqual(embedding1.length, embedding2.length, 'Embeddings should have same length') 109 | 110 | // Should be identical (or very close due to floating point precision) 111 | for (let i = 0; i < embedding1.length; i++) { 112 | const diff = Math.abs(embedding1[i] - embedding2[i]) 113 | assert(diff < 0.0001, `Embedding values should be consistent at index ${i}: ${embedding1[i]} vs ${embedding2[i]}`) 114 | } 115 | }) 116 | 117 | test('should produce different embeddings for different inputs', async () => { 118 | const string1 = 'First test string' 119 | const string2 = 'Completely different sentence' 120 | 121 | const embedding1 = await calculateEmbeddings(string1) 122 | const embedding2 = await calculateEmbeddings(string2) 123 | 124 | // Should have same length 125 | assert.strictEqual(embedding1.length, embedding2.length, 'Embeddings should have same length') 126 | 127 | // Should be different - compute cosine similarity 128 | let dotProduct = 0 129 | let norm1 = 0 130 | let norm2 = 0 131 | 132 | for (let i = 0; i < embedding1.length; i++) { 133 | dotProduct += embedding1[i] * embedding2[i] 134 | norm1 += embedding1[i] * embedding1[i] 135 | norm2 += embedding2[i] * embedding2[i] 136 | } 137 | 138 | const similarity = dotProduct / (Math.sqrt(norm1) * Math.sqrt(norm2)) 139 | 140 | // Different strings should have similarity less than 1.0 (not identical) 141 | assert(similarity < 0.99, `Different strings should produce different embeddings, similarity: ${similarity}`) 142 | 143 | // But similarity should still be reasonable (not completely random) 144 | assert(similarity > -1.0 && similarity < 1.0, `Similarity should be in valid range [-1, 1]: ${similarity}`) 145 | }) 146 | 147 | test('should handle empty strings gracefully', async () => { 148 | const emptyString = '' 149 | 150 | try { 151 | const embedding = await calculateEmbeddings(emptyString) 152 | 153 | // Should still return valid embedding dimensions 154 | assert.strictEqual(embedding.length, 384, 'Empty string should still return 384-dimensional embedding') 155 | 156 | // Should contain valid numbers 157 | assert( 158 | embedding.every(val => typeof val === 'number' && isFinite(val)), 159 | 'Empty string embedding should contain valid finite numbers' 160 | ) 161 | } catch (error) { 162 | // If it throws an error, that's also acceptable behavior for empty strings 163 | assert(error instanceof Error, 'Should throw a proper Error for empty strings') 164 | } 165 | }) 166 | 167 | test('should handle reasonably long strings', async () => { 168 | // Create a moderately long string (not too long to avoid ONNX model limits) 169 | const longString = 'This is a moderately long test string. '.repeat(10) 170 | 171 | const embedding = await calculateEmbeddings(longString) 172 | 173 | // Should still return valid embedding dimensions 174 | assert.strictEqual(embedding.length, 384, 'Long string should still return 384-dimensional embedding') 175 | 176 | // Should be normalized 177 | let norm = 0 178 | for (let i = 0; i < embedding.length; i++) { 179 | norm += embedding[i] * embedding[i] 180 | } 181 | norm = Math.sqrt(norm) 182 | 183 | assert(Math.abs(norm - 1.0) < 0.001, `Long string embedding should be normalized: ${norm}`) 184 | }) 185 | 186 | test('should handle model corruption and re-download', async () => { 187 | // Create a temporary test directory to simulate corruption without affecting real models 188 | const testModelDir = path.join(__dirname, 'temp_model_test') 189 | if (!fs.existsSync(testModelDir)) { 190 | fs.mkdirSync(testModelDir, { recursive: true }) 191 | } 192 | 193 | try { 194 | // Create a corrupted ONNX model file 195 | const corruptModelPath = path.join(testModelDir, 'model.onnx') 196 | const corruptData = 'This is not a valid ONNX model file - just corrupted text data' 197 | fs.writeFileSync(corruptModelPath, corruptData) 198 | 199 | // Verify the corrupted file is much smaller than expected 200 | const corruptSize = fs.statSync(corruptModelPath).size 201 | assert(corruptSize < 1000, 'Corrupted model should be small') 202 | 203 | // For this test, we'll just verify the corruption detection would work 204 | // without actually triggering a full re-download in the test suite 205 | const corruptContent = fs.readFileSync(corruptModelPath, 'utf-8') 206 | assert(corruptContent.includes('not a valid ONNX'), 'Should be able to detect corrupted content') 207 | 208 | // Test passes - real corruption handling is tested in integration 209 | assert(true, 'Corruption detection logic works') 210 | } finally { 211 | // Clean up temp directory 212 | if (fs.existsSync(testModelDir)) { 213 | fs.rmSync(testModelDir, { recursive: true, force: true }) 214 | } 215 | } 216 | }) 217 | }) 218 | 219 | test('should handle tokenizer corruption and re-download', async () => { 220 | // Create a temporary test directory to simulate corruption 221 | const testModelDir = path.join(__dirname, 'temp_tokenizer_test') 222 | if (!fs.existsSync(testModelDir)) { 223 | fs.mkdirSync(testModelDir, { recursive: true }) 224 | } 225 | 226 | try { 227 | // Create an invalid JSON tokenizer file 228 | const corruptTokenizerPath = path.join(testModelDir, 'tokenizer.json') 229 | fs.writeFileSync(corruptTokenizerPath, 'This is not valid JSON data for tokenizer') 230 | 231 | // Verify corruption detection would work 232 | let threwError = false 233 | try { 234 | JSON.parse(fs.readFileSync(corruptTokenizerPath, 'utf-8')) 235 | } catch (error) { 236 | threwError = true 237 | assert(error instanceof SyntaxError, 'Should throw JSON parsing error for corrupted tokenizer') 238 | } 239 | 240 | assert(threwError, 'Should detect corrupted JSON tokenizer') 241 | 242 | // Test passes - real corruption handling is tested in integration 243 | assert(true, 'Tokenizer corruption detection logic works') 244 | } finally { 245 | // Clean up temp directory 246 | if (fs.existsSync(testModelDir)) { 247 | fs.rmSync(testModelDir, { recursive: true, force: true }) 248 | } 249 | } 250 | }) 251 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | 203 | -------------------------------------------------------------------------------- /lib/calculateEmbeddings.js: -------------------------------------------------------------------------------- 1 | import fs from 'fs/promises' 2 | import { constants } from 'fs' 3 | import path from 'path' 4 | import { fileURLToPath } from 'url' 5 | import * as ort from 'onnxruntime-web' 6 | 7 | ort.env.debug = false 8 | ort.env.logLevel = 'error' 9 | 10 | const __dirname = path.dirname(fileURLToPath(import.meta.url)) 11 | 12 | const MODEL_NAME = 'Xenova/all-MiniLM-L6-v2' 13 | const MODEL_DIR = path.resolve(__dirname, '..', 'models') 14 | 15 | const FILES = ['onnx/model.onnx', 'tokenizer.json', 'tokenizer_config.json'] 16 | 17 | async function saveFile(buffer, outputPath) { 18 | await fs.writeFile(outputPath, Buffer.from(buffer)) 19 | } 20 | 21 | async function fileExists(filePath) { 22 | try { 23 | await fs.access(filePath, constants.F_OK) 24 | return true 25 | } catch { 26 | return false 27 | } 28 | } 29 | 30 | async function downloadFile(url, outputPath) { 31 | const res = await fetch(url) 32 | if (!res.ok) throw new Error(`Failed to download ${url}, status ${res.status}`) 33 | 34 | if (url.endsWith('.onnx')) { 35 | const arrayBuffer = await res.arrayBuffer() 36 | await saveFile(arrayBuffer, outputPath) 37 | } else if (url.endsWith('.json')) { 38 | const json = await res.json() 39 | await saveFile(JSON.stringify(json, null, 2), outputPath) 40 | } else { 41 | const text = await res.text() 42 | await saveFile(text, outputPath) 43 | } 44 | } 45 | 46 | async function downloadModelIfNeeded() { 47 | try { 48 | await fs.access(MODEL_DIR) 49 | } catch { 50 | await fs.mkdir(MODEL_DIR, { recursive: true }) 51 | } 52 | 53 | for (const file of FILES) { 54 | const filePath = path.join(MODEL_DIR, path.basename(file)) 55 | if (!(await fileExists(filePath))) { 56 | const url = `https://huggingface.co/${MODEL_NAME}/resolve/main/${file}` 57 | await downloadFile(url, filePath) 58 | } 59 | } 60 | } 61 | 62 | async function forceRedownloadModel() { 63 | // Reset session and vocab to force reinitialization 64 | session = null 65 | vocab = null 66 | 67 | // Delete all model files to force re-download 68 | for (const file of FILES) { 69 | const filePath = path.join(MODEL_DIR, path.basename(file)) 70 | if (await fileExists(filePath)) { 71 | await fs.unlink(filePath).catch(() => {}) 72 | } 73 | } 74 | 75 | // Force re-download 76 | await downloadModelIfNeeded() 77 | } 78 | 79 | async function initializeModelAndVocab() { 80 | const modelPath = path.join(MODEL_DIR, 'model.onnx') 81 | const vocabPath = path.join(MODEL_DIR, 'tokenizer.json') 82 | 83 | const loadModelAndVocab = async () => { 84 | // Load model as buffer for onnxruntime-web 85 | const modelBuffer = await fs.readFile(modelPath) 86 | session = await ort.InferenceSession.create(modelBuffer) 87 | 88 | // Try to parse tokenizer JSON 89 | const tokenizerJson = JSON.parse(await fs.readFile(vocabPath, 'utf-8')) 90 | 91 | // Validate tokenizer structure 92 | if (!tokenizerJson.model || !tokenizerJson.model.vocab) { 93 | throw new Error('Invalid tokenizer structure: missing model.vocab') 94 | } 95 | 96 | vocab = tokenizerJson.model.vocab 97 | 98 | // Convert to clean Map to avoid prototype pollution 99 | const cleanVocab = new Map() 100 | for (const [token, id] of Object.entries(vocab)) { 101 | if (typeof id === 'number') { 102 | cleanVocab.set(token, id) 103 | } 104 | } 105 | vocab = cleanVocab 106 | } 107 | 108 | try { 109 | await loadModelAndVocab() 110 | } catch { 111 | // Model or tokenizer is corrupted, force re-download 112 | await forceRedownloadModel() 113 | 114 | // Retry initialization after re-download 115 | try { 116 | await loadModelAndVocab() 117 | } catch { 118 | throw new Error('Failed to restore valid tokenizer after re-download') 119 | } 120 | } 121 | } 122 | 123 | /** 124 | * Proper WordPiece tokenizer that closely matches HuggingFace BERT behavior: 125 | * - BERT-style pre-tokenization (handle punctuation properly) 126 | * - True WordPiece algorithm with greedy longest-match 127 | * - Proper Unicode normalization and lowercasing 128 | * - Special token handling 129 | */ 130 | 131 | /** 132 | * Basic text normalization similar to BERT 133 | */ 134 | function normalizeText(text) { 135 | // Convert to NFD normalization (decomposed) 136 | text = text.normalize('NFD') 137 | 138 | // Remove control characters except whitespace 139 | // eslint-disable-next-line no-control-regex 140 | text = text.replace(/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x9F]/g, '') 141 | 142 | // Normalize whitespace 143 | text = text.replace(/\s+/g, ' ').trim() 144 | 145 | return text 146 | } 147 | 148 | /** 149 | * BERT-style punctuation detection 150 | */ 151 | function isPunctuation(char) { 152 | const cp = char.codePointAt(0) 153 | 154 | // ASCII punctuation 155 | if ((cp >= 33 && cp <= 47) || (cp >= 58 && cp <= 64) || (cp >= 91 && cp <= 96) || (cp >= 123 && cp <= 126)) { 156 | return true 157 | } 158 | 159 | // Unicode punctuation categories 160 | const unicodeCat = getUnicodeCategory(char) 161 | return unicodeCat && /^P[cdfipeos]$/.test(unicodeCat) 162 | } 163 | 164 | /** 165 | * Simple Unicode category detection (basic implementation) 166 | */ 167 | function getUnicodeCategory(char) { 168 | // This is a simplified version - real BERT uses full Unicode database 169 | // For most common cases, we can use JavaScript's built-in properties 170 | if (/\p{P}/u.test(char)) return 'P' // Punctuation 171 | if (/\p{N}/u.test(char)) return 'N' // Number 172 | if (/\p{L}/u.test(char)) return 'L' // Letter 173 | if (/\p{M}/u.test(char)) return 'M' // Mark 174 | if (/\p{S}/u.test(char)) return 'S' // Symbol 175 | if (/\p{Z}/u.test(char)) return 'Z' // Separator 176 | return null 177 | } 178 | 179 | /** 180 | * BERT-style pre-tokenization: split on whitespace and punctuation 181 | */ 182 | function preTokenize(text) { 183 | const tokens = [] 184 | let currentToken = '' 185 | 186 | for (const char of text) { 187 | if (/\s/.test(char)) { 188 | // Whitespace - finish current token 189 | if (currentToken) { 190 | tokens.push(currentToken) 191 | currentToken = '' 192 | } 193 | } else if (isPunctuation(char)) { 194 | // Punctuation - finish current token and add punctuation as separate token 195 | if (currentToken) { 196 | tokens.push(currentToken) 197 | currentToken = '' 198 | } 199 | tokens.push(char) 200 | } else { 201 | // Regular character - add to current token 202 | currentToken += char 203 | } 204 | } 205 | 206 | // Add final token if any 207 | if (currentToken) { 208 | tokens.push(currentToken) 209 | } 210 | 211 | return tokens.filter(token => token.length > 0) 212 | } 213 | 214 | /** 215 | * True WordPiece tokenization with greedy longest-match algorithm 216 | */ 217 | function wordPieceTokenize(token, vocab, unkToken = '[UNK]', maxInputCharsPerWord = 200) { 218 | if (token.length > maxInputCharsPerWord) { 219 | return [unkToken] 220 | } 221 | 222 | const outputTokens = [] 223 | let start = 0 224 | 225 | while (start < token.length) { 226 | let end = token.length 227 | let currentSubstring = null 228 | 229 | // Greedy longest-match: try longest possible substring first 230 | while (start < end) { 231 | let substring = token.substring(start, end) 232 | 233 | // Add ## prefix for continuation tokens (not at word start) 234 | if (start > 0) { 235 | substring = '##' + substring 236 | } 237 | 238 | if (vocab.has(substring)) { 239 | currentSubstring = substring 240 | break 241 | } 242 | end -= 1 243 | } 244 | 245 | if (currentSubstring === null) { 246 | // No valid substring found, mark as unknown 247 | return [unkToken] 248 | } 249 | 250 | outputTokens.push(currentSubstring) 251 | start = end 252 | } 253 | 254 | return outputTokens 255 | } 256 | 257 | /** 258 | * Main tokenization function that combines all steps 259 | */ 260 | function wordPieceTokenizer(text, vocab, maxLength = 512) { 261 | const unkToken = '[UNK]' 262 | const clsToken = '[CLS]' 263 | const sepToken = '[SEP]' 264 | 265 | // Get special token IDs using Map interface 266 | const clsId = vocab.get(clsToken) ?? 101 267 | const sepId = vocab.get(sepToken) ?? 102 268 | const unkId = vocab.get(unkToken) ?? 100 269 | 270 | // Validate special token IDs 271 | if (typeof clsId !== 'number' || typeof sepId !== 'number' || typeof unkId !== 'number') { 272 | throw new Error('Special tokens must have numeric IDs') 273 | } 274 | 275 | // Step 1: Normalize text 276 | const normalizedText = normalizeText(text) 277 | 278 | // Step 2: Pre-tokenization (split on whitespace and punctuation) 279 | const preTokens = preTokenize(normalizedText) 280 | 281 | // Step 3: WordPiece tokenization 282 | const tokens = [clsToken] 283 | const ids = [clsId] 284 | 285 | for (const preToken of preTokens) { 286 | // Convert to lowercase for BERT 287 | const lowercaseToken = preToken.toLowerCase() 288 | 289 | // Apply WordPiece algorithm 290 | const wordPieceTokens = wordPieceTokenize(lowercaseToken, vocab, unkToken) 291 | 292 | for (const wpToken of wordPieceTokens) { 293 | const tokenId = vocab.get(wpToken) ?? unkId 294 | tokens.push(wpToken) 295 | ids.push(tokenId) 296 | } 297 | } 298 | 299 | // Add SEP token 300 | tokens.push(sepToken) 301 | ids.push(sepId) 302 | 303 | // Handle length constraints with chunking 304 | if (tokens.length <= maxLength) { 305 | return [{ tokens, ids }] 306 | } 307 | 308 | // For longer texts, create overlapping chunks 309 | const maxContentLength = maxLength - 2 // Reserve space for [CLS] and [SEP] 310 | const overlap = Math.floor(maxContentLength * 0.1) // 10% overlap 311 | const chunkSize = maxContentLength - overlap 312 | 313 | const chunks = [] 314 | const contentTokens = tokens.slice(1, -1) // Remove [CLS] and [SEP] 315 | const contentIds = ids.slice(1, -1) 316 | 317 | for (let i = 0; i < contentTokens.length; i += chunkSize) { 318 | const chunkTokens = [clsToken, ...contentTokens.slice(i, i + maxContentLength - 1), sepToken] 319 | const chunkIds = [clsId, ...contentIds.slice(i, i + maxContentLength - 1), sepId] 320 | 321 | chunks.push({ 322 | tokens: chunkTokens, 323 | ids: chunkIds 324 | }) 325 | } 326 | 327 | return chunks 328 | } 329 | 330 | /** 331 | * Process embeddings for multiple chunks and combine them 332 | */ 333 | async function processChunkedEmbeddings(chunks, session) { 334 | const embeddings = [] 335 | 336 | for (const chunk of chunks) { 337 | const { ids } = chunk 338 | 339 | // ONNX Runtime input tensors must be int64 (BigInt64Array) 340 | // Add validation for token IDs before converting to BigInt 341 | const validIds = ids.filter(id => { 342 | const isValid = typeof id === 'number' && !isNaN(id) && isFinite(id) 343 | if (!isValid) { 344 | throw new Error(`Invalid token ID detected: ${id} (type: ${typeof id})`) 345 | } 346 | return isValid 347 | }) 348 | 349 | if (validIds.length !== ids.length) { 350 | throw new Error(`Found ${ids.length - validIds.length} invalid token IDs`) 351 | } 352 | 353 | const inputIds = new BigInt64Array(validIds.map(i => BigInt(i))) 354 | const attentionMask = new BigInt64Array(validIds.length).fill(BigInt(1)) 355 | const tokenTypeIds = new BigInt64Array(validIds.length).fill(BigInt(0)) 356 | 357 | const inputTensor = new ort.Tensor('int64', inputIds, [1, validIds.length]) 358 | const attentionTensor = new ort.Tensor('int64', attentionMask, [1, validIds.length]) 359 | const tokenTypeTensor = new ort.Tensor('int64', tokenTypeIds, [1, validIds.length]) 360 | 361 | const feeds = { 362 | input_ids: inputTensor, 363 | attention_mask: attentionTensor, 364 | token_type_ids: tokenTypeTensor 365 | } 366 | 367 | const results = await session.run(feeds) 368 | const lastHiddenState = results['last_hidden_state'] 369 | const [, sequenceLength, hiddenSize] = lastHiddenState.dims 370 | const embeddingData = lastHiddenState.data 371 | 372 | // Apply mean pooling across the sequence dimension 373 | const pooledEmbedding = new Float32Array(hiddenSize) 374 | for (let i = 0; i < hiddenSize; i++) { 375 | let sum = 0 376 | for (let j = 0; j < sequenceLength; j++) { 377 | sum += embeddingData[j * hiddenSize + i] 378 | } 379 | pooledEmbedding[i] = sum / sequenceLength 380 | } 381 | 382 | embeddings.push(pooledEmbedding) 383 | } 384 | 385 | // If multiple chunks, average the embeddings 386 | if (embeddings.length === 1) { 387 | return embeddings[0] 388 | } 389 | 390 | const hiddenSize = embeddings[0].length 391 | const avgEmbedding = new Float32Array(hiddenSize) 392 | 393 | // Average across all chunks 394 | for (let i = 0; i < hiddenSize; i++) { 395 | let sum = 0 396 | for (const embedding of embeddings) { 397 | sum += embedding[i] 398 | } 399 | avgEmbedding[i] = sum / embeddings.length 400 | } 401 | 402 | return avgEmbedding 403 | } 404 | 405 | let session = null 406 | let vocab = null 407 | 408 | // Start downloading and initializing model when module loads 409 | const modelInitPromise = (async () => { 410 | try { 411 | await downloadModelIfNeeded() 412 | await initializeModelAndVocab() 413 | } catch { 414 | // Don't throw here - let the main function handle initialization 415 | } 416 | })() 417 | 418 | export function resetSession() { 419 | session = null 420 | vocab = null 421 | } 422 | 423 | export default async function calculateEmbeddings(text) { 424 | // Wait for the model to be preloaded, then ensure it's initialized 425 | await modelInitPromise 426 | 427 | if (!session || !vocab) { 428 | await initializeModelAndVocab() 429 | } 430 | 431 | const chunks = wordPieceTokenizer(text, vocab) 432 | 433 | function normalizeEmbedding(embedding) { 434 | let norm = 0 435 | for (let i = 0; i < embedding.length; i++) { 436 | norm += embedding[i] * embedding[i] 437 | } 438 | norm = Math.sqrt(norm) 439 | 440 | const normalized = new Float32Array(embedding.length) 441 | for (let i = 0; i < embedding.length; i++) { 442 | normalized[i] = embedding[i] / norm 443 | } 444 | return normalized 445 | } 446 | 447 | try { 448 | const pooledEmbedding = await processChunkedEmbeddings(chunks, session) 449 | return normalizeEmbedding(pooledEmbedding) 450 | } catch { 451 | // If inference fails, it might be due to model corruption 452 | // Try to recover by re-downloading and reinitializing 453 | 454 | await forceRedownloadModel() 455 | await initializeModelAndVocab() 456 | 457 | const retryPooledEmbedding = await processChunkedEmbeddings(chunks, session) 458 | return normalizeEmbedding(retryPooledEmbedding) 459 | } 460 | } 461 | -------------------------------------------------------------------------------- /tests/compare-calculateEmbeddings-huggingface.test.js: -------------------------------------------------------------------------------- 1 | import { test } from 'node:test' 2 | import assert from 'node:assert' 3 | import calculateEmbeddings from '../lib/calculateEmbeddings.js' 4 | 5 | test('compare calculateEmbeddings with HuggingFace on code-snippets.json', async () => { 6 | // Load HuggingFace pipeline 7 | const { pipeline } = await import('@huggingface/transformers') 8 | const hfPipeline = await pipeline('feature-extraction', 'Xenova/all-MiniLM-L6-v2', { 9 | pooling: 'mean', 10 | normalize: true, 11 | dtype: 'fp32' 12 | }) 13 | 14 | // Code snippets embedded directly 15 | const codeSnippets = [ 16 | { 17 | labels: ['installation', 'cds toolkit', 'npm', 'Node.js', 'CLI'], 18 | code: 'npm add -g @sap/cds-dk', 19 | type: 'shell', 20 | summary: 21 | "This command installs the @sap/cds-dk toolkit globally using npm. The toolkit provides the 'cds' command line interface required for SAP Cloud Application Programming Model (CAP) development.", 22 | source: ' Getting Started > Initial Setup > Installation' 23 | }, 24 | { 25 | labels: ['installation', 'verify', 'cds CLI'], 26 | code: 'cds', 27 | type: 'shell', 28 | summary: 29 | "Running this command verifies that the 'cds' command line interface has been installed successfully. The output displays usage information and available commands for CAP projects.", 30 | source: ' Getting Started > Initial Setup > Installation' 31 | }, 32 | { 33 | labels: ['init', 'project setup', 'cds CLI'], 34 | code: 'cds init bookshop', 35 | type: 'shell', 36 | summary: 37 | "Initializes a new CAP project named 'bookshop' with the required directory structure and configuration files. This is the entry point for starting CAP-based projects.", 38 | source: ' Getting Started > Starting Projects' 39 | }, 40 | { 41 | labels: ['editor', 'VS Code', 'project open'], 42 | code: 'code bookshop', 43 | type: 'shell', 44 | summary: 45 | "Opens the newly initialized 'bookshop' CAP project in Visual Studio Code. Assumes you have set up the 'code' command for VS Code.", 46 | source: ' Getting Started > Starting Projects' 47 | }, 48 | { 49 | labels: ['project structure', 'scaffolding'], 50 | code: "bookshop/ # Your project's root folder\n├─ app/ # UI-related content\n├─ srv/ # Service-related content\n├─ db/ # Domain models and database-related content\n├─ package.json # Configuration for cds + cds-dk\n└─ readme.md # A readme placeholder", 51 | type: 'shell', 52 | summary: 53 | "Shows the default folder structure of a CAP project generated by 'cds init'. Directories include app, srv, db, and configuration files like package.json and readme.md.", 54 | source: ' Getting Started > Project Structure' 55 | }, 56 | { 57 | labels: ['configuration', 'package.json', 'custom project layout'], 58 | code: '{ ...\n "cds": {\n "folders": {\n "db": "database/",\n "srv": "services/",\n "app": "uis/"\n }\n }\n}', 59 | type: 'json', 60 | summary: 61 | "This JSON snippet demonstrates how to override the default CAP project folder layout by specifying custom directories for db, srv, and app through the 'cds.folders' property in package.json.", 62 | source: ' Getting Started > Project Structure' 63 | }, 64 | { 65 | labels: ['cds CLI', 'environment', 'defaults', 'list'], 66 | code: 'cds env ls defaults', 67 | type: 'shell', 68 | summary: 69 | 'Lists the default environment configurations and directory structure used by cds in the current CAP project. Useful for exploring and understanding CAP project conventions.', 70 | source: ' Getting Started > Project Structure' 71 | }, 72 | { 73 | labels: ['CLI', 'cds CLI', 'init', 'project setup', 'verify'], 74 | code: 'cds init\ncds watch', 75 | type: 'shell', 76 | summary: 77 | "These two shell commands are used to rapidly initialize and start a new CAP (Cloud Application Programming Model) project. 'cds init' scaffolds a minimalistic new project with default configuration, while 'cds watch' starts a server with live reload for fast development. Used to jumpstart CAP development by following the convention over configuration principle.", 78 | source: 'Jumpstart & Grow As You Go... > Jumpstarting Projects' 79 | }, 80 | { 81 | labels: ['CLI', 'cds CLI', 'add', 'project setup', 'configuration', 'environment'], 82 | code: 'cds add hana,redis,mta,helm,mtx,multitenancy,extensibility...', 83 | type: 'shell', 84 | summary: 85 | 'This shell command allows you to add features or integrations to a CAP project only as needed. Common options include database adapters (hana, redis), deployed artifact types (mta, helm), and capabilities like multitenancy or extensibility. This approach supports incremental project evolution and iterative workflow in CAP projects, avoiding premature decisions.', 86 | source: 'Jumpstart & Grow As You Go... > Growing as You Go...' 87 | }, 88 | { 89 | labels: [ 90 | 'service definition', 91 | 'srv/catalog-service.cds', 92 | 'Books', 93 | 'Orders', 94 | 'projection', 95 | 'authorization', 96 | 'entities', 97 | 'projection', 98 | 'readonly', 99 | 'insertonly' 100 | ], 101 | code: "using { my.domain as my } from './db/schema';\n\n/** Serves end users browsing books and place orders */\nservice CatalogService {\n @readonly entity Books as select from my.Books {\n ID, title, author.name as author\n };\n @requires: 'authenticated-user'\n @insertonly entity Orders as projection on my.Orders;\n}", 102 | type: 'cds', 103 | summary: 104 | 'Defines a CatalogService for browsing books and placing orders. The Books entity is exposed as readonly with selected fields, while Orders is exposed as insertonly for authenticated users. Each entity is projected from the domain model.', 105 | source: ' Best Practices > Single-Purposed Services > DO: One Service Per Use Case' 106 | }, 107 | { 108 | labels: [ 109 | 'service definition', 110 | 'srv/users-service.cds', 111 | 'Orders', 112 | 'projection', 113 | 'authorization', 114 | 'actions', 115 | 'restrict', 116 | 'readonly' 117 | ], 118 | code: "/** Serves registered users managing their account and their orders */\n@requires: 'authenticated-user'\nservice UsersService {\n @restrict: [{ grant: 'READ', where: 'buyer = $user' }] // limit to own ones\n @readonly entity Orders as projection on my.Orders;\n action cancelOrder ( ID:Orders.ID, reason:String );\n}", 119 | type: 'cds', 120 | summary: 121 | "Defines a UsersService for registered users to manage their own orders. Only orders belonging to the authenticated user can be read, and an action 'cancelOrder' is provided to allow users to cancel their orders.", 122 | source: ' Best Practices > Single-Purposed Services > DO: One Service Per Use Case' 123 | }, 124 | { 125 | labels: [ 126 | 'service definition', 127 | 'srv/admin-service.cds', 128 | 'Books', 129 | 'Authors', 130 | 'Orders', 131 | 'projection', 132 | 'authorization' 133 | ], 134 | code: "/** Serves administrators managing everything */\n@requires: 'authenticated-user'\nservice AdminService {\n entity Books as projection on my.Books;\n entity Authors as projection on my.Authors;\n entity Orders as projection on my.Orders;\n}", 135 | type: 'cds', 136 | summary: 137 | 'Defines an AdminService for administrators to manage all aspects of the application. The service exposes Books, Authors, and Orders entities as projections for full administrative access, restricted to authenticated users.', 138 | source: ' Best Practices > Single-Purposed Services > DO: One Service Per Use Case' 139 | }, 140 | { 141 | labels: ['automatic transactions', 'db.read', 'Service-managed Transactions', 'cds CLI', 'SQL'], 142 | code: "await db.read('Books')", 143 | type: 'js', 144 | summary: 145 | "Example of an automatic transaction using CAP's db.read API in JavaScript. The CAP framework manages transaction boundaries automatically, including connection acquisition and release, so no explicit transaction code is needed.", 146 | source: ' Transaction Management > Automatic Transactions' 147 | }, 148 | { 149 | labels: ['automatic transactions', 'SQL', 'connection pool'], 150 | code: '-- ACQUIRE connection from pool\nCONNECT; -- if no pooled one\nBEGIN;\nSELECT * from Books;\nCOMMIT;\n-- RELEASE connection to pool', 151 | type: 'sql', 152 | summary: 153 | "SQL-level representation of a transaction managed automatically by CAP when executing a db.read('Books') operation. Illustrates connection pooling, transaction begin/commit, and release.", 154 | source: ' Transaction Management > Automatic Transactions' 155 | }, 156 | { 157 | labels: ['event handler', 'nested transactions', 'service-to-service calls'], 158 | code: "const log = cds.connect.to('log')\nconst db = cds.connect.to('db')\n\nBankingService.on ('transfer', req => {\n let { from, to, amount } = req.data\n await db.update('BankAccount',from).set('balance -=', amount),\n await db.update('BankAccount',to).set('balance +=', amount),\n await log.insert ({ kind:'Transfer', from, to, amount })\n})", 159 | type: 'js', 160 | summary: 161 | 'Shows handling of nested transactions inside an event handler for a bank transfer scenario. CAP runtime manages a root transaction for the event and nested ones for DB and log service interactions.', 162 | source: ' Transaction Management > Nested Transactions' 163 | }, 164 | { 165 | labels: ['manual transactions', 'cds.tx', 'transaction handling'], 166 | code: "cds.tx (async ()=>{\n const [ Emily ] = await db.insert (Authors, {name:'Emily Brontë'})\n await db.insert (Books, { title: 'Wuthering Heights', author: Emily })\n})", 167 | type: 'js', 168 | summary: 169 | 'Manually starting and committing a transaction using cds.tx() to insert an author and a book in a single transactional context. CAP will handle commit/rollback for all operations within the supplied function.', 170 | source: ' Transaction Management > Manual Transactions' 171 | }, 172 | { 173 | labels: ['background jobs', 'cds.spawn', 'async operations'], 174 | code: "cds.spawn ({ user: cds.User.privileged, every: 1000 /* ms */ }, async ()=>{\n const mails = await SELECT.from('Outbox')\n await MailServer.send(mails)\n await DELETE.from('Outbox').where (`ID in ${mails.map(m => m.ID)}`)\n})", 175 | type: 'js', 176 | summary: 177 | 'Creates a background job using cds.spawn() to process outbox mails periodically under a privileged user. Each run executes in a fresh transaction, independent of the main event context.', 178 | source: ' Transaction Management > Background Jobs' 179 | }, 180 | { 181 | labels: ['context', 'cds.context', 'user', 'tenant'], 182 | code: "const { user } = cds.context\nif (user.is('admin')) ...", 183 | type: 'js', 184 | summary: 185 | 'Accesses the current user from cds.context to check for admin role. Demonstrates accessing runtime event context for authorization and logic branching.', 186 | source: ' Transaction Management > cds. context {event-contexts .property} > Accessing Context' 187 | }, 188 | { 189 | labels: ['context', 'cds.context', 'http', 'request', 'response'], 190 | code: "const { req, res } = cds.context.http\nif (!req.is('application/json')) res.send(415)", 191 | type: 'js', 192 | summary: 193 | 'Shows how to access HTTP request and response objects from cds.context in CAP. Can be used for content negotiation and protocol-level handling within service operations or handlers.', 194 | source: ' Transaction Management > cds. context {event-contexts .property} > Accessing Context' 195 | }, 196 | { 197 | labels: ['context', 'cds.context', 'middleware', 'custom authentication'], 198 | code: "app.use ((req, res, next) => {\n const { 'x-tenant':tenant, 'x-user-id':user } = req.headers\n cds.context = { tenant, user } // Setting cds.context\n next()\n})", 199 | type: 'js', 200 | summary: 201 | 'Example of custom Express middleware that sets cds.context based on incoming HTTP headers for tenant and user. Used for custom authentication or context propagation in CAP applications.', 202 | source: ' Transaction Management > cds. context {event-contexts .property} > Setting Contexts' 203 | }, 204 | { 205 | labels: ['context propagation', 'transaction context', 'cds.tx', 'user', 'tenant'], 206 | code: "cds.context = { tenant:'t1', user:'u1' }\ncds.context.user.id === 'u1' //> true\nlet tx = cds.tx({ user:'u2' })\ntx.context !== cds.context //> true\ntx.context.tenant === 't1' //> true\ntx.context.user.id === 'u2' //> true\ntx.context.user !== cds.context.user //> true\ncds.context.user.id === 'u1' //> true", 207 | type: 'js', 208 | summary: 209 | 'Illustrates how a new transaction context inherits properties from cds.context, and how you can override some (like user) while maintaining others (like tenant). Shows transaction and context independence.', 210 | source: ' Transaction Management > cds. context {event-contexts .property} > Context Propagation' 211 | }, 212 | { 213 | labels: ['cds.tx', 'srv.tx', 'method signature', 'service', 'transaction'], 214 | code: 'function srv.tx ( ctx?, fn? : tx => {...} ) => Promise\nfunction srv.tx ( ctx? ) => tx\nvar ctx : { tenant, user, locale }', 215 | type: 'ts', 216 | summary: 217 | "TypeScript signatures for CAP's srv.tx method showing function overloads for starting transactions manually and optionally providing a context and/or a function to execute transactional code.", 218 | source: ' Transaction Management > cds/srv. tx() {srv-tx .method}' 219 | }, 220 | { 221 | labels: ['srv.tx', 'manual transaction', 'transaction object', 'commit', 'rollback'], 222 | code: 'const tx = srv.tx()\ntry {\n let exists = await tx.run ( SELECT(1).from(Books,201).forUpdate() )\n if (exists) await tx.update (Books,201).with(data)\n else await tx.create (Books,{ ID:201,...data })\n await tx.commit()\n} catch(e) {\n await tx.rollback(e)\n}', 223 | type: 'js', 224 | summary: 225 | 'Manual transaction management with srv.tx(): creates a transaction object used to run several queries, with explicit commit/rollback handling.', 226 | source: ' Transaction Management > cds/srv. tx() {srv-tx .method}' 227 | }, 228 | { 229 | labels: ['srv.tx', 'db.tx', 'manual transaction', 'commit', 'rollback', 'Service API'], 230 | code: "let db = await cds.connect.to('db')\nlet tx = db.tx()\ntry {\n await tx.run (SELECT.from(Foo))\n await tx.create (Foo, {...})\n await tx.read (Foo)\n await tx.commit()\n} catch(e) {\n await tx.rollback(e)\n}", 231 | type: 'js', 232 | summary: 233 | 'Starts a manual transaction on a database service, executes multiple operations, and manages commit/rollback explicitly. Demonstrates proper lifecycle management for transactions outside of event handlers.', 234 | source: ' Transaction Management > cds/srv. tx() {srv-tx .method} > srv.tx (context?, fn?) → tx ' 235 | }, 236 | { 237 | labels: ['srv.tx', 'context', 'user', 'tenant'], 238 | code: "let tx = db.tx ({ tenant:'t1' user:'u2' })", 239 | type: 'js', 240 | summary: 241 | 'Creates a new transaction (tx) on the database service with a specific tenant and user context, overriding any ambient context.', 242 | source: 243 | ' Transaction Management > cds/srv. tx() {srv-tx .method} > srv.tx ({ tenant?, user?, ... }) → tx {srv-tx-ctx}' 244 | }, 245 | { 246 | labels: ['srv.tx', 'function callback', 'auto commit', 'auto rollback'], 247 | code: 'await db.tx (async tx => {\n await tx.run (SELECT.from(Foo))\n await tx.create (Foo, {...})\n await tx.read (Foo)\n})', 248 | type: 'js', 249 | summary: 250 | "Runs a transaction using db.tx with an async function argument: automatically commits if the function completes, or rolls back if there's an error.", 251 | source: 252 | ' Transaction Management > cds/srv. tx() {srv-tx .method} > srv.tx ((tx)=>{...}) → tx {srv-tx-fn}' 253 | }, 254 | { 255 | labels: ['srv.tx', 'manual transaction', 'commit', 'rollback'], 256 | code: 'let tx = db.tx()\ntry {\n await tx.run (SELECT.from(Foo))\n await tx.create (Foo, {...})\n await tx.read (Foo)\n await tx.commit()\n} catch(e) {\n await tx.rollback(e)\n}', 257 | type: 'js', 258 | summary: 259 | 'Equivalent manual transaction management using db.tx: explicit try/catch with commit/rollback, functionally similar to the auto-commit variant but with more control over error handling.', 260 | source: 261 | ' Transaction Management > cds/srv. tx() {srv-tx .method} > srv.tx ((tx)=>{...}) → tx {srv-tx-fn}' 262 | }, 263 | { 264 | labels: ['cds.tx', 'context', 'nested transaction', 'root transaction'], 265 | code: "cds.context = { tenant:'t1', user:'u2' }\nconst tx = cds.tx (cds.context)\n//> tx is a new root transaction", 266 | type: 'js', 267 | summary: 268 | 'Creates a new root transaction with CDS, inheriting context properties from cds.context. Useful for performing work under explicit context.', 269 | source: 270 | ' Transaction Management > cds/srv. tx() {srv-tx .method} > srv.tx (ctx) → tx {srv-tx-context}' 271 | }, 272 | { 273 | labels: ['cds.tx', 'nested transaction', 'context propagation'], 274 | code: "const tx = cds.context = cds.tx ({ tenant:'t1', user:'u2' })\nconst tx1 = cds.tx (cds.context)\n//> tx1 is a new nested transaction to tx", 275 | type: 'js', 276 | summary: 277 | 'Demonstrates creating a nested transaction with explicit event context. Shows how nested transactions are created and how context is handled.', 278 | source: 279 | ' Transaction Management > cds/srv. tx() {srv-tx .method} > srv.tx (ctx) → tx {srv-tx-context}' 280 | }, 281 | { 282 | labels: ['transaction object', 'commit', 'rollback', 'promise chaining'], 283 | code: 'let tx = cds.tx()\ntx.run(...) .then (tx.commit, tx.rollback)', 284 | type: 'js', 285 | summary: 286 | 'Shows use of promise chaining for commit and rollback methods on a transaction object (tx), which are both bound to the transaction instance and return or propagate their argument.', 287 | source: 288 | ' Transaction Management > cds/srv. tx() {srv-tx .method} > _↳_ tx.commit (res?) ⇢ res {commit }' 289 | } 290 | ] 291 | 292 | // Pre-warm our embeddings model 293 | await calculateEmbeddings('initialization test') 294 | 295 | // Test all 30 snippets 296 | const sampleSnippets = codeSnippets 297 | 298 | const similarities = [] 299 | 300 | for (const snippet of sampleSnippets) { 301 | // Format the snippet text 302 | const text = `${snippet.source}\n${snippet.labels.join(', ')}\n${snippet.summary}\n\n\`\`\`${snippet.type}\n${snippet.code}\n\`\`\`\n` 303 | 304 | // Get embeddings from both implementations 305 | const ourEmbedding = await calculateEmbeddings(text) 306 | const hfResult = await hfPipeline(text, { pooling: 'mean', normalize: true }) 307 | 308 | // Extract HuggingFace embedding 309 | let hfEmbedding = hfResult 310 | if (hfResult && typeof hfResult.data !== 'undefined') { 311 | hfEmbedding = hfResult.data 312 | } else if (Array.isArray(hfResult)) { 313 | hfEmbedding = Array.isArray(hfResult[0]) ? hfResult[0] : hfResult 314 | } 315 | 316 | // Verify dimensions match 317 | assert.strictEqual(ourEmbedding.length, hfEmbedding.length, 'Embedding dimensions should match') 318 | assert.strictEqual(ourEmbedding.length, 384, 'Should be 384-dimensional') 319 | 320 | // Calculate cosine similarity 321 | let similarity = 0 322 | for (let i = 0; i < ourEmbedding.length; i++) { 323 | similarity += ourEmbedding[i] * hfEmbedding[i] 324 | } 325 | 326 | similarities.push(similarity) 327 | } 328 | 329 | // Calculate average similarity 330 | const avgSimilarity = similarities.reduce((sum, s) => sum + s, 0) / similarities.length 331 | 332 | // Assert reasonable similarity (should be > 0.9 since they're the same model) 333 | assert(avgSimilarity > 0.9, `Average similarity should be > 0.9, got ${avgSimilarity.toFixed(4)}`) 334 | 335 | // Assert all similarities are in valid range (allow slight floating point error) 336 | for (const sim of similarities) { 337 | assert(sim >= -1.001 && sim <= 1.001, `Similarity should be in range [-1, 1], got ${sim}`) 338 | } 339 | }) 340 | --------------------------------------------------------------------------------