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backport.yml
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name: Backport PR to branch
on:
issue_comment:
types: [created]
schedule:
# once a day at 13:00 UTC
- cron: '0 13 * * *'
permissions:
contents: write
issues: write
pull-requests: write
jobs:
cleanup_old_runs:
if: github.event.schedule == '0 13 * * *'
runs-on: ubuntu-20.04
permissions:
actions: write
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
steps:
- name: Delete old workflow runs
run: |
_UrlPath="/repos/$GITHUB_REPOSITORY/actions/workflows"
_CurrentWorkflowID="$(gh api -X GET "$_UrlPath" | jq '.workflows[] | select(.name == '\""$GITHUB_WORKFLOW"\"') | .id')"
# delete workitems which are 'completed'. (other candidate values of status field are: 'queued' and 'in_progress')
gh api -X GET "$_UrlPath/$_CurrentWorkflowID/runs" --paginate \
| jq '.workflow_runs[] | select(.status == "completed") | .id' \
| xargs -I{} gh api -X DELETE "/repos/$GITHUB_REPOSITORY/actions/runs"/{}
backport:
if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/backport to')
runs-on: ubuntu-20.04
steps:
- name: Extract backport target branch
uses: actions/github-script@v3
id: target-branch-extractor
with:
result-encoding: string
script: |
if (context.eventName !== "issue_comment") throw "Error: This action only works on issue_comment events.";
// extract the target branch name from the trigger phrase containing these characters: a-z, A-Z, digits, forward slash, dot, hyphen, underscore
const regex = /^\/backport to ([a-zA-Z\d\/\.\-\_]+)/;
target_branch = regex.exec(context.payload.comment.body);
if (target_branch == null) throw "Error: No backport branch found in the trigger phrase.";
return target_branch[1];
- name: Post backport started comment to pull request
uses: actions/github-script@v3
with:
script: |
const backport_start_body = `Started backporting to ${{ steps.target-branch-extractor.outputs.result }}: https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${process.env.GITHUB_RUN_ID}`;
await github.issues.createComment({
issue_number: context.issue.number,
owner: context.repo.owner,
repo: context.repo.repo,
body: backport_start_body
});
- name: Checkout repo
uses: actions/checkout@v2
with:
fetch-depth: 0
- name: Run backport
uses: ./eng/actions/backport
with:
target_branch: ${{ steps.target-branch-extractor.outputs.result }}
auth_token: ${{ secrets.GITHUB_TOKEN }}
pr_description_template: |
Backport of #%source_pr_number% to %target_branch%
/cc %cc_users%
## Customer Impact
## Testing
## Risk
IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary [package authoring](https://github.com/dotnet/runtime/blob/main/docs/project/library-servicing.md) and gotten it explicitly reviewed.