├── Dockerfile
├── LICENSE
├── README.md
└── entrypoint.sh


/Dockerfile:
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 1 | FROM alpine:latest
 2 | 
 3 | LABEL repository="http://github.com/srt32/revert"
 4 | LABEL homepage="http://github.com/srt32/revert"
 5 | LABEL "com.github.actions.name"="Automatic Revert"
 6 | LABEL "com.github.actions.description"="Automatically revert a commit on '/revert' comment"
 7 | LABEL "com.github.actions.icon"="git-pull-request"
 8 | LABEL "com.github.actions.color"="red"
 9 | 
10 | RUN apk --no-cache add jq bash curl git
11 | 
12 | ADD entrypoint.sh /entrypoint.sh
13 | ENTRYPOINT ["/entrypoint.sh"]
14 | 


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/LICENSE:
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 1 | MIT License
 2 | 
 3 | Copyright (c) 2019 Simon Taranto
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/README.md:
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 1 | # GitHub Action to revert a commit via a comment
 2 | 
 3 | After installation, comment `/revert <commit_sha>` to trigger the action.
 4 | 
 5 | ![revert](https://user-images.githubusercontent.com/2181356/52225171-027d0100-2867-11e9-90a5-84073c790f0b.gif)
 6 | 
 7 | 
 8 | ## Installation
 9 | 
10 | ```
11 | name: Automatic Revert
12 | 
13 | on:
14 |   issue_comment:
15 |     types: [created]
16 | 
17 | jobs:
18 |   revert-commit:
19 | 
20 |     runs-on: ubuntu-latest
21 | 
22 |     if: contains(github.event.comment.body, '/revert')
23 | 
24 |     steps:
25 |       - name: Checkout latest code
26 |         uses: actions/checkout@v2
27 |       - name: Automatic Revert
28 |         uses: srt32/revert@v0.0.1
29 |         env:
30 |           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
31 |  ```      
32 | 
33 | This Action is heavily inspired by [rebase](https://github.com/cirrus-actions/rebase).
34 | 


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/entrypoint.sh:
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 1 | #!/bin/bash
 2 | 
 3 | set -e
 4 | 
 5 | # skip if no /revert
 6 | echo "Checking if contains '/revert' command..."
 7 | (jq -r ".comment.body" "$GITHUB_EVENT_PATH" | grep -E "/revert") || exit 78
 8 | 
 9 | # skip if not a PR
10 | echo "Checking if a PR command..."
11 | (jq -r ".issue.pull_request.url" "$GITHUB_EVENT_PATH") || exit 78
12 | 
13 | # get the SHA to revert
14 | COMMIT_TO_REVERT=$(jq -r ".comment.body" "$GITHUB_EVENT_PATH" | cut -c 9-)
15 | 
16 | if [[ "$(jq -r ".action" "$GITHUB_EVENT_PATH")" != "created" ]]; then
17 | 	echo "This is not a new comment event!"
18 | 	exit 78
19 | fi
20 | 
21 | PR_NUMBER=$(jq -r ".issue.number" "$GITHUB_EVENT_PATH")
22 | REPO_FULLNAME=$(jq -r ".repository.full_name" "$GITHUB_EVENT_PATH")
23 | echo "Collecting information about PR #$PR_NUMBER of $REPO_FULLNAME..."
24 | 
25 | if [[ -z "$GITHUB_TOKEN" ]]; then
26 | 	echo "Set the GITHUB_TOKEN env variable."
27 | 	exit 1
28 | fi
29 | 
30 | URI=https://api.github.com
31 | API_HEADER="Accept: application/vnd.github.v3+json"
32 | AUTH_HEADER="Authorization: token $GITHUB_TOKEN"
33 | 
34 | pr_resp=$(curl -X GET -s -H "${AUTH_HEADER}" -H "${API_HEADER}" \
35 |           "${URI}/repos/$REPO_FULLNAME/pulls/$PR_NUMBER")
36 | 
37 | HEAD_REPO=$(echo "$pr_resp" | jq -r .head.repo.full_name)
38 | HEAD_BRANCH=$(echo "$pr_resp" | jq -r .head.ref)
39 | 
40 | git remote set-url origin https://x-access-token:$GITHUB_TOKEN@github.com/$REPO_FULLNAME.git
41 | git config --global user.email "revert@github.com"
42 | git config --global user.name "GitHub Revert Action"
43 | 
44 | set -o xtrace
45 | 
46 | git fetch origin $HEAD_BRANCH
47 | 
48 | # do the revert
49 | git checkout -b $HEAD_BRANCH origin/$HEAD_BRANCH
50 | 
51 | # check commit exists
52 | git cat-file -t $COMMIT_TO_REVERT
53 | git revert $COMMIT_TO_REVERT --no-edit
54 | git push origin $HEAD_BRANCH
55 | 


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