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automate_merge_message.yml
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name: Automate merge message
on:
pull_request_target:
branches: ['master']
types: ['closed']
permissions:
pull-requests: write
actions: none
checks: none
contents: none
deployments: none
issues: none
packages: none
pages: none
repository-projects: none
security-events: none
statuses: none
jobs:
message:
# prevent running towards forks, and only run on merged PRs
if: github.repository == 'backstage/backstage' && github.event.pull_request.merged == true
runs-on: ubuntu-latest
steps:
- name: Harden Runner
uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
with:
egress-policy: audit
- uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
with:
ref: '${{ github.event.pull_request.merge_commit_sha }}'
- name: fetch head & base
run: git fetch --depth 1 origin ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }}
# We avoid using the in-source script since this workflow has elevated permissions that we don't want to expose
- name: Generate Message
id: generate-message
run: |
rm -f generate.js
wget -O generate.js https://raw.githubusercontent.com/backstage/backstage/master/scripts/generate-merge-message.js 1>&2
node generate.js ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }} > message.txt
- name: Post Message
uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
env:
ISSUE_NUMBER: ${{ github.event.pull_request.number }}
with:
script: |
const owner = "backstage";
const repo = "backstage";
const body = require('fs').readFileSync('message.txt', 'utf8').trim();
const issue_number = Number(process.env.ISSUE_NUMBER);
if (!body) {
console.log(`skipping comment for #${issue_number}`);
return;
}
console.log(`creating comment for #${issue_number}`);
await github.rest.issues.createComment({
owner,
repo,
issue_number,
body,
});