close_issue.yaml

name: close-issues

# (c) 2020 by Linus Gasser for C4DT.org
# This action closes issues referenced in the PR in the case the merge
# does not happen on the 'default' branch.
# It searches for the same tags as the original github closers.

on:
  pull_request:
    types: [closed]
    branches: [develop]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: script
        uses: actions/github-script@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const pr = context.payload.pull_request;
            if (!pr.merged){
              console.log("Don't close issues when PR is not merged");
              return;
            }

            const body = pr.body;
            const lines = body.split('\n').map((l)=>l.trim());
            const closers = new RegExp(
              /^(close|closes|closed|fix|fixes|fixed|resolve|resolves|resolved) .*#/i);
            const issues = lines.filter((l)=>l.match(closers));
            const issue_nbrs = issues.map((i) => i.replace(/.*#/, ''));
            issue_nbrs.forEach((i) => {
              console.log("Closing issue " + i);
              github.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: i,
                body: `Closed by PR #${pr.number} ${pr.title}`
              });
              github.issues.update({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: i,
                state: 'closed'
              });
            });