├── .gitignore ├── LICENSE ├── README.md ├── isolate-side-effects.monopic ├── microlib.monopic ├── project.clj ├── src └── microlib │ ├── act.clj │ ├── core.clj │ ├── meat.clj │ └── schemas.clj ├── test-input ├── pretend-libbit │ ├── src │ │ └── libbit │ │ │ └── pretend.clj │ └── test │ │ └── libbit │ │ └── pretend_test.clj └── project-without-libbit │ ├── banana │ ├── project.clj │ └── src │ └── dest_project │ └── core.clj └── test └── microlib ├── core_test.clj └── meat_test.clj /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | /classes 3 | /checkouts 4 | pom.xml 5 | pom.xml.asc 6 | *.jar 7 | *.class 8 | /.lein-* 9 | /.nrepl-port 10 | test-results 11 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC 2 | LICENSE ("AGREEMENT"). 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No party to this 212 | Agreement will bring a legal action under this Agreement more than one year 213 | after the cause of action arose. Each party waives its rights to a jury trial 214 | in any resulting litigation. 215 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # microlib 2 | 3 | Bring in tiny dependencies, like utility functions, bringing the code into your project. 4 | 5 | 6 | 7 | ## Purpose 8 | 9 | Maven-style dependency resolution, where each dependency is brought in only once no matter how many times it's used, 10 | have their place. Other times, they're annoying - there's version resolution, backwards compatibility issues. 11 | 12 | Sometimes all you want is a little utility function. You can either keep writing it over and over, or you can put it in 13 | a library. It's cut-and-paste hell, or transitive-dependency hell. 14 | 15 | Microlibraries (or "libbits," library-bits) try to take the hell out of cut-and-paste hell. 16 | 17 | A microlibrary exposes (hopefully) one function. 18 | It brings in no dependencies that don't already exist in your project. (not enforced by this program) 19 | It comes with its own tests, which execute alongside your tests. Basically, it's a standardized utility function. 20 | 21 | Compared to cut and paste, microlibraries 22 | * are standardized 23 | * come with tests 24 | * can be upgraded 25 | 26 | In my dream world, they're available online in a central repo, with ratings and endorsements. 27 | 28 | Compared to maven-style dependencies, microlibraries 29 | * never introduce version conflicts, because they're imported each time 30 | * are just the right size: no grouping, no big libraries for a few functions 31 | * upgrade independently. No adjusting usages of other functions because you wanted to upgrade this one. 32 | 33 | ## Usage 34 | 35 | This program is an MVP -- meaning, a test. It copies source files from a microlibrary project to another project, 36 | changing the namespaces, and that's it. 37 | 38 | 39 | ┌────────────────────────────────┐ 40 | │destination-project │ 41 | │ ┌────┐ │ 42 | │ │src │ │ 43 | │ └────┘ │ ┌────────────────────────────────┐ 44 | │ ┌───────────────┐ │ │new-libbit │ 45 | │ │ project-name │ │ cut & │ ┌────┐ │ 46 | │ └───────────────┘ │ paste │ │src │ │ 47 | │ ┌ ─ ─ ─ ─ ─ ─ ─ ─ │ like a │ └────┘ │ 48 | │ ┌────────┐ │ │ pro! │ ┌────────┐ │ 49 | │ ││ libbit │ │ │ │ libbit │ │ 50 | │ └────────┘ │ │ │ └────────┘ │ 51 | │ │ new_libbit.clj ◀───────┼───────────────┼──────── new_libbit.clj │ 52 | │ ─ ─ ─ ─ ─ ─ ─ ─ ┘ │ │ ┌─────┐ │ 53 | │ ┌─────┐ │ │ │test │ │ 54 | │ │test │ │ │ └─────┘ │ 55 | │ └─────┘ │ │ ┌────────┐ │ 56 | │ ┌───────────────┐ │ │ │ libbit │ │ 57 | │ │ project-name │ │ │ └────────┘ │ 58 | │ └───────────────┘ │ ┌────┼─────────new_libbit_test.clj │ 59 | │ ┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┐ │ │ │ │ 60 | │ ┌────────┐ │ │ └────────────────────────────────┘ 61 | │ ││ libbit │ │ │ │ 62 | │ └────────┘ │ │ 63 | │ │ new_libbit_test.clj ◀─┼──────────┘ 64 | │ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ │ 65 | └────────────────────────────────┘ 66 | 67 | 68 | If you want to play with this, clone this project; create or clone a microlibrary; have another Clojure project 69 | that wants to use the microlibrary, and then run this project: 70 | 71 | lein run -l -d [-n ] [-d program-arguments 55 | gather-data-from-filesystem 56 | meat/install-libbit 57 | act-on-filesystem)) 58 | 59 | (s/defn make-contents-available :- [t/FileWithContents] [files :- [java.io.File]] 60 | (map (fn [f] {:location f :contents (delay (slurp f))}) files) 61 | ) 62 | 63 | (s/defn gather-data-from-filesystem [{:keys [libbit-location destproj-location] :as input}] 64 | (-> input 65 | (assoc :libbit-files (make-contents-available (file-seq (io/file libbit-location)))) 66 | (assoc :destproj-file-seq (file-seq (io/file destproj-location))))) 67 | -------------------------------------------------------------------------------- /src/microlib/meat.clj: -------------------------------------------------------------------------------- 1 | (ns microlib.meat 2 | (:require [schema.core :as s] 3 | [microlib.schemas :as t] 4 | [clojure.java.io :only [file] :refer [file]] 5 | [clojure.string :as str])) 6 | 7 | (declare populate-destproj-name populate-libbit-name write-src-file write-test-file) 8 | 9 | (s/defn ^:always-validate install-libbit [input-data :- {:libbit-location t/PathString 10 | :destproj-location t/PathString 11 | :libbit-files [t/FileWithContents] 12 | :destproj-file-seq [java.io.File] 13 | (s/optional-key :libbit-name) (s/maybe t/LibbitName) 14 | (s/optional-key :destproj-name) (s/maybe t/ProjectName)}] 15 | (let [full-input (-> input-data 16 | populate-libbit-name 17 | populate-destproj-name) 18 | instructions (concat (write-src-file full-input) 19 | (write-test-file full-input))] 20 | instructions)) 21 | 22 | ;; Default the name of the libbit and project 23 | ;; to the name of the directory each is located in 24 | (declare last-path-component) 25 | (s/defn ^:always-validate populate-libbit-name :- {:libbit-name t/LibbitName, s/Any s/Any} 26 | [{:keys [libbit-name libbit-location] :as input}] 27 | (assoc input :libbit-name (or libbit-name (last-path-component libbit-location)))) 28 | (s/defn ^:always-validate populate-destproj-name :- {:destproj-name t/ProjectName, s/Any s/Any} 29 | [{:keys [destproj-name destproj-location] :as input}] 30 | (assoc input :destproj-name (or destproj-name (last-path-component destproj-location)))) 31 | 32 | (s/defn last-path-component [loc :- t/PathString] 33 | (let [full-path (.getCanonicalPath (file loc))] 34 | (last (.split full-path java.io.File/separator)))) 35 | 36 | (declare as-clojure-file snakecase find-file change-ns mkdir-to) 37 | 38 | (s/defn old-ns [{:keys [libbit-name]}] 39 | (str "libbit." libbit-name)) 40 | 41 | (s/defn new-ns [{:keys [libbit-name destproj-name]}] 42 | (str/join "." [destproj-name "libbit" libbit-name])) 43 | 44 | 45 | (s/defn src-file-location [{:keys [libbit-name]}] 46 | (str/join java.io.File/separator ["src" "libbit" (as-clojure-file libbit-name)])) 47 | 48 | (s/defn dest-src-file [{:keys [destproj-location destproj-name libbit-name]}] 49 | (file destproj-location "src" (snakecase destproj-name) "libbit" (as-clojure-file libbit-name))) 50 | 51 | (s/defn write-src-file :- [t/Instruction] [input] 52 | (let [src-file (find-file (src-file-location input) (:libbit-location input) (:libbit-files input)) 53 | dest-file (dest-src-file input)] 54 | (cond 55 | (nil? src-file) 56 | [{:error (str "Libbit source file not found in " (src-file-location input))}] 57 | 58 | (not (.contains (deref (:contents src-file)) (old-ns input))) 59 | [{:error (str "expected ns " (old-ns input) " not detected in " (:location src-file))}] 60 | 61 | :else 62 | (concat (mkdir-to dest-file (:destproj-file-seq input)) 63 | [{:write {:to dest-file 64 | :contents (change-ns (old-ns input) (new-ns input) (deref (:contents src-file)))}}])))) 65 | 66 | 67 | ;; convention: namespace-test is the test namespace 68 | (s/defn test-file-location [{:keys [libbit-name]}] 69 | (str/join java.io.File/separator ["test" "libbit" (as-clojure-file (str libbit-name "-test"))])) 70 | 71 | 72 | (s/defn dest-test-file [{:keys [destproj-location destproj-name libbit-name]}] 73 | (file destproj-location "test" (snakecase destproj-name) "libbit" (as-clojure-file (str libbit-name "-test")))) 74 | 75 | (s/defn write-test-file [input] 76 | (let [test-file (find-file (test-file-location input) (:libbit-location input) (:libbit-files input)) 77 | dest-file-location (dest-test-file input)] 78 | (cond 79 | (nil? test-file) 80 | [{:warning "No test file found"}] 81 | 82 | :else 83 | [{:mkdir {:for dest-file-location}} 84 | {:write {:to dest-file-location 85 | :contents (.replaceAll (deref (:contents test-file)) (old-ns input) (new-ns input))}}]))) 86 | 87 | 88 | (s/defn find-file :- (s/maybe t/FileWithContents) [file-path relative-to fileses] 89 | (let [relative-uri (.toURI (file relative-to)) 90 | matches? (s/fn [fwc :- t/FileWithContents] 91 | (let [relative-path (.toString (.relativize 92 | relative-uri 93 | (.toURI (:location fwc))))] 94 | (= file-path relative-path)))] 95 | (first (filter matches? fileses)))) 96 | 97 | (s/defn mkdir-to :- [t/Instruction] 98 | "Issue a mkdir instruction only if the directory does not exist. 99 | It would totally be easier to always do this. It's idempotent, after all." 100 | [file-we-want-to-create existing-files-surrounding-it] 101 | (let [directory-we-want (.toURI (.getParentFile (.getCanonicalFile file-we-want-to-create))) 102 | existing-paths (map #(.toURI %) existing-files-surrounding-it) 103 | matches (filter (partial = directory-we-want) existing-paths)] 104 | (cond 105 | (seq matches) 106 | [] 107 | :else 108 | [{:mkdir {:for (file file-we-want-to-create)}}]))) 109 | 110 | 111 | (s/defn snakecase :- t/JavaCompatibleName [kebab :- s/Str] 112 | (.replace kebab "-" "_")) 113 | 114 | (defn as-clojure-file 115 | [name] 116 | (str (snakecase name) ".clj")) 117 | 118 | (s/defn change-ns [old-ns new-ns contents-of-clj] 119 | (.replaceFirst contents-of-clj (str "\\(ns " old-ns) (str "(ns " new-ns))) -------------------------------------------------------------------------------- /src/microlib/schemas.clj: -------------------------------------------------------------------------------- 1 | (ns microlib.schemas 2 | (:require [schema.core :as s]) 3 | (:import (java.io File))) 4 | 5 | (defn delayed 6 | "The intention is a schema that wraps a delay thingie with a check. Not implemented" 7 | [schema] 8 | clojure.lang.Delay) 9 | 10 | (s/defschema FileWithContents {:location File :contents (delayed s/Str)} ) 11 | 12 | (s/defschema Libbit {:name (s/maybe s/Str) ;; a Clojure ns? 13 | :location File 14 | :files [FileWithContents]}) 15 | 16 | (s/defschema DestinationProject {:name (s/maybe s/Str) ;; Clojure ns? 17 | :location File 18 | :files [File]}) 19 | 20 | (s/defschema LibbitName (s/both s/Str (s/pred (partial not= ".") ". is not a libbit"))) 21 | (s/defschema ProjectName (s/both s/Str (s/pred (partial not= ".") ". is not a name"))) 22 | (s/def PathString (s/named s/Str "string containing a filesystem path")) 23 | 24 | (s/defschema JavaCompatibleName (s/both s/Str 25 | (s/pred #(not (.contains % "-")) "no dashes allowed"))) 26 | 27 | ;; act 28 | (s/defschema WriteInstruction {:write {:to File :contents s/Str}}) 29 | (s/defschema MkdirInstruction {:mkdir {:for File}}) 30 | (s/defschema ErrorInstruction {:error s/Str}) 31 | (s/defschema NoOp {:noop s/Any}) 32 | (s/defschema Instruction (s/named (s/either WriteInstruction MkdirInstruction ErrorInstruction NoOp) "Instruction")) -------------------------------------------------------------------------------- /test-input/pretend-libbit/src/libbit/pretend.clj: -------------------------------------------------------------------------------- 1 | (ns libbit.pretend) 2 | 3 | (defn poo [] 4 | :poo) -------------------------------------------------------------------------------- /test-input/pretend-libbit/test/libbit/pretend_test.clj: -------------------------------------------------------------------------------- 1 | (ns libbit.pretend-test 2 | (:require [libbit.pretend :as subject] 3 | [clojure.test :refer [deftest is]])) 4 | 5 | (deftest whatever 6 | (is (= :poo (subject/poo)))) 7 | -------------------------------------------------------------------------------- /test-input/project-without-libbit/banana: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/jessitron/microlib/b52a88184b54abbda91e4d73bc24200a494c547b/test-input/project-without-libbit/banana -------------------------------------------------------------------------------- /test-input/project-without-libbit/project.clj: -------------------------------------------------------------------------------- 1 | (defproject dest-project "0.1.0-SNAPSHOT" 2 | :dependencies [[org.clojure/clojure "1.6.0"]]) -------------------------------------------------------------------------------- /test-input/project-without-libbit/src/dest_project/core.clj: -------------------------------------------------------------------------------- 1 | (ns dest-project.core 2 | (require [dest-project.libbit.pretend :as the-libbit])) 3 | 4 | (defn double-poo [] 5 | [(the-libbit/poo) (the-libbit/poo)]) -------------------------------------------------------------------------------- /test/microlib/core_test.clj: -------------------------------------------------------------------------------- 1 | (ns microlib.core-test 2 | (:require [clojure.test :refer [deftest is testing]] 3 | [microlib.core :as subject] 4 | [clojure.test.check.clojure-test :refer [defspec]] 5 | [clojure.java.io :as io] 6 | [clojure.java.shell :refer [sh]] 7 | [schema.test])) 8 | 9 | (clojure.test/use-fixtures :once schema.test/validate-schemas) 10 | 11 | ;; These refer to hand-made directories and files inside this project 12 | (def test-template "test-input/project-without-libbit") 13 | (def test-libbit-name "pretend") ;; matches the .clj file in the pretend libbit 14 | (def test-destination "test-results") 15 | (def test-destproj-name "dest-project") 16 | (def test-libbit "test-input/pretend-libbit") 17 | 18 | (deftest one-hardcoded-test 19 | (sh "rm" "-r" test-destination) 20 | (sh "cp" "-r" test-template test-destination) 21 | (subject/-main "-l" test-libbit "-d" test-destination "-n" test-libbit-name "-p" test-destproj-name) 22 | (let [code-file (io/file (str test-destination "/src/dest_project/libbit/pretend.clj")) 23 | test-file (io/file (str test-destination "/test/dest_project/libbit/pretend_test.clj")) 24 | results-of-lein-test (:out (sh "lein" "test" :dir test-destination))] 25 | (and (is (.exists code-file)) 26 | (is (.startsWith (slurp code-file) (str "(ns " test-destproj-name ".libbit.pretend"))) 27 | (is (.exists test-file)) 28 | (is (.contains results-of-lein-test "Ran 1 tests containing 1 assertions" )) 29 | (is (.contains results-of-lein-test "0 failures, 0 errors" ))))) 30 | 31 | 32 | -------------------------------------------------------------------------------- /test/microlib/meat_test.clj: -------------------------------------------------------------------------------- 1 | (ns microlib.meat-test 2 | (:require [clojure.test :refer [deftest is testing]] 3 | [microlib.meat :as subject] 4 | [clojure.java.io :only [file] :refer [file]] 5 | [schema.test])) 6 | 7 | (clojure.test/use-fixtures :once schema.test/validate-schemas) 8 | 9 | (defn contains-item [thing list] 10 | (seq (filter (partial = thing) list))) 11 | 12 | (deftest example-of-libbit-decisions 13 | (testing "Destination has one libbit already; new one gets copied in" 14 | (let [result (subject/install-libbit {:libbit-name "libbit-name" 15 | :destproj-name "dest-proj" 16 | :libbit-location "/Users/fake/libbitname-dir" 17 | :destproj-location "/Users/fake/destproj-dir" 18 | :destproj-file-seq [(file "/Users/fake/destproj-dir/src/dest_proj/libbit/other_libbit.clj") 19 | (file "/Users/fake/destproj-dir/src/dest_proj/libbit/")] ;; it would contain more but this is the important bit 20 | :libbit-files [{:location (file "/Users/fake/libbitname-dir/src/libbit/libbit_name.clj") 21 | :contents (delay "(ns libbit.libbit-name) \"blahblah\" ")} 22 | {:location (file "/Users/fake/libbitname-dir/test/libbit/libbit_name_test.clj") 23 | :contents (delay "(ns libbit.libbit-name-test (require [libbit.libbit-name :as subject])) \"blahblah\" ")}]})] 24 | (is (= {:write {:to (file "/Users/fake/destproj-dir/src/dest_proj/libbit/libbit_name.clj") 25 | :contents "(ns dest-proj.libbit.libbit-name) \"blahblah\" "}} 26 | (first result))) 27 | (is (contains-item {:write {:to (file "/Users/fake/destproj-dir/test/dest_proj/libbit/libbit_name_test.clj") 28 | :contents "(ns dest-proj.libbit.libbit-name-test (require [dest-proj.libbit.libbit-name :as subject])) \"blahblah\" "}} 29 | result)))) 30 | (testing "Destination has no libbits yet; dir is created" 31 | ;; this could also be expressed as a property: every write and mkdir command 32 | ;; returned is either for a directory that exists, or one that has 33 | ;; been created by a prior mkdir 34 | (let [result (subject/install-libbit {:libbit-name "libbit-name" 35 | :destproj-name "destproj" 36 | :libbit-location "/Users/fake/libbitname-dir" 37 | :destproj-location "/Users/fake/destproj-dir" 38 | :destproj-file-seq [(file "Users/fake/destproj-dir/src/destproj/core.clj") ;; this one has all the dirs we need except libbit 39 | (file "Users/fake/destproj-dir/src/destproj/")] 40 | :libbit-files [{:location (file "/Users/fake/libbitname-dir/src/libbit/libbit_name.clj") 41 | :contents (delay "(ns libbit.libbit-name) \"blahblah\" ")} 42 | {:location (file "/Users/fake/libbitname-dir/test/libbit/libbit_name_test.clj") 43 | :contents (delay "(ns libbit.libbit-name-test (require [libbit.libbit-name :as subject])) \"blahblah\" ")}]})] 44 | (is (= {:mkdir {:for (file "/Users/fake/destproj-dir/src/destproj/libbit/libbit_name.clj")}} 45 | (first result))) 46 | (is (= {:write {:to (file "/Users/fake/destproj-dir/src/destproj/libbit/libbit_name.clj") 47 | :contents "(ns destproj.libbit.libbit-name) \"blahblah\" "}} 48 | (second result))) 49 | (is (= {:mkdir {:for (file "/Users/fake/destproj-dir/test/destproj/libbit/libbit_name_test.clj")}} 50 | (nth result 2)))))) --------------------------------------------------------------------------------