commands.yml

name: Commands on PR
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-latest
    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"/{}

  run_command:
    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/run')
    runs-on: ubuntu-latest
    steps:
    - name: Extract command to run
      uses: actions/github-script@v3
      id: command-extractor
      with:
        result-encoding: string
        script: |
          if (context.eventName !== "issue_comment") throw "Error: This action only works on issue_comment events.";

          // extract the command to run, allowed characters: a-z, A-Z, digits, hyphen, underscore
          const regex = /^\/run ([a-zA-Z\d\-\_]+)/;
          command = regex.exec(context.payload.comment.body);
          if (command == null) throw "Error: No command found in the trigger phrase.";

          return command[1];
    - name: Get github ref
      uses: actions/github-script@v3
      id: get-pr
      with:
        script: |
          const result = await github.pulls.get({
            pull_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
          });
          return { "ref": result.data.head.ref, "repository": result.data.head.repo.full_name};
    - name: Checkout repo
      uses: actions/checkout@v2
      with:
        repository: ${{ fromJson(steps.get-pr.outputs.result).repository }}
        ref: ${{ fromJson(steps.get-pr.outputs.result).ref }}
        fetch-depth: 0
    - name: Install dotnet
      uses: actions/setup-dotnet@v3
      with:
        global-json-file: global.json
    - name: Install dotnet tools
      run: dotnet tool restore
    - name: Process fantomas command
      if: steps.command-extractor.outputs.result == 'fantomas'
      id: fantomas
      run: dotnet fantomas .
    - name: Process xlf command
      if: steps.command-extractor.outputs.result == 'xlf'
      id: xlf
      run: dotnet build src/Compiler /t:UpdateXlf
    - name: Check if UpdateXlf ran
      run: |
        for f in /tmp/xlf_a*.txt; do
        echo "File: $f"
        cat "$f" || echo "$f not created"
        done
    - name: Commit and push changes
      if: steps.fantomas.outcome == 'success' || steps.xlf.outcome == 'success' || steps.ilverify.outcome == 'success'
      run: |
        # Only commit if there are actual changes
        if git diff --quiet; then
          echo "No changes to commit, skipping."
          exit 0
        fi
        
        git config --local user.name "github-actions[bot]"
        git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
        git commit -a -m 'Automated command ran: ${{ steps.command-extractor.outputs.result }}

          Co-authored-by: ${{ github.event.comment.user.login }} <${{ github.event.comment.user.id }}+${{ github.event.comment.user.login }}@users.noreply.github.com>'
        git push
    - name: Post command comment
      if: steps.fantomas.outcome == 'success' || steps.xlf.outcome == 'success' || steps.ilverify.outcome == 'success'
      uses: actions/github-script@v3
      with:
        script: |
          // Probably, there's more universal way of getting outputs, but my gh-actions-fu is not that good.
          var output = ""
          if ("${{steps.command-extractor.outputs.result}}" == 'fantomas') {
            output = "${{steps.fantomas.outputs.result}}"
          } else if ("${{steps.command-extractor.outputs.result}}" == 'xlf') {
            output = "${{steps.xlf.outputs.result}}"
          } else if ("${{steps.command-extractor.outputs.result}}" == 'ilverify') {
            output = "${{steps.ilverify.outputs.result}}"
          }
          const body = `Ran ${{ steps.command-extractor.outputs.result }}: https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${process.env.GITHUB_RUN_ID}\n${output}`;
          await github.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: body
          });
    - name: Post command failed comment
      if: failure()
      uses: actions/github-script@v3
      with:
        script: |
          const body = `Failed to run ${{ steps.command-extractor.outputs.result }}: https://github.com/${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: body
          });