.github/workflows/daily-dev-bump.yaml

name: Bump Dev Version
on:
  workflow_dispatch: # Allows for manual triggering if needed
  pull_request:
    types: [closed]
  schedule:
    # * is a special character in YAML so you have to quote this string
    - cron: "0 8 * * *" # Run every day at midnight Pacific Time
permissions:
  contents: write
  pull-requests: write

env:
  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

jobs:
  bump-dev-version:
    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'schedule' }}
    name: Bump Dev Version
    runs-on: ubuntu-latest
    steps:
      - name: git clone devtools
        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
        with:
          ref: master

      - uses: dart-lang/setup-dart@a57a6c04cf7d4840e88432aad6281d1e125f0d46

      - name: setup git config
        run: |

          # TODO(https://github.com/flutter/devtools/issues/4949):  Change the author to
          # a flutter owned account
          git config user.name "DevTools Workflow Bot"
          git config user.email "dart-devtool-workflow-bot@google.com"

      - name: Bump the Dev Version
        id: version-bump
        run: |
          set -x
          pushd tool/
          dart pub get
          popd

          CURRENT_VERSION=$(dart tool/update_version.dart current-version)
          if ! echo "$CURRENT_VERSION" |grep -Eq "\-dev\.[0-9]+" ; then
            ERROR_DESCRIPTION="Doing \
          a Dev bump on a release version ($CURRENT_VERSION) is not supported. \
          Ensure that that current version has been properly bumped to a '-dev.*' \
          pre-release version, in order to continue daily dev bumps."

            echo "::error ,title=Cannot Bump A Release Version ($CURRENT_VERSION)::$ERROR_DESCRIPTION" 
            exit 1;
          fi

          # Get the commit message
          COMMIT_MESSAGE=$(dart tool/update_version.dart auto --dry-run --type dev)
          echo "COMMIT_MESSAGE=$COMMIT_MESSAGE" >> $GITHUB_OUTPUT

          # Do the update
          dart tool/update_version.dart auto --type dev

      - name: Create the PR
        run: |
          BRANCH_NAME="auto-bump-$(date +%s)"
          # Stage the file, commit and push
          git checkout -b "$BRANCH_NAME"
          git commit -a -m "$COMMIT_MESSAGE"
          git push -u origin "$BRANCH_NAME"

          PR_URL=$(gh pr create --title "$COMMIT_MESSAGE" --body "RELEASE_NOTE_EXCEPTION=Automated Version Bump")

          # Change github credentials back to the actions bot.
          GH_TOKEN="$ORIGINAL_GH_TOKEN"
          gh pr edit $PR_URL --add-label "autosubmit"

        env:
          COMMIT_MESSAGE: ${{ steps.version-bump.outputs.COMMIT_MESSAGE }}
          GH_TOKEN: ${{ secrets.DEVTOOLS_WORKFLOW_BOT_TOKEN }}
          ORIGINAL_GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  clean-up-branches:
    # If a pr is closed on a workflow bot PR, then clean up workflow bot branches.
    if: ${{ github.event_name == 'pull_request' && github.event.action == 'closed'  && github.event.pull_request.user.login == 'DartDevtoolWorkflowBot'}}
    name: Clean up Dev Bump Branches
    runs-on: ubuntu-latest
    steps:
      - name: Clean up branches
        run: |
          # Get 5 most recent branches of closed DartDevtoolWorkflowBot PRs.
          CLOSED_BRANCH_NAMES=$(gh pr list -A DartDevtoolWorkflowBot -s closed -L 5 --search sort:created-desc | grep auto-bump- | sed 's|.*\(auto-bump-[[:digit:]]*\).*|\1|')

          # Get list of refs(branches) that exist on the remote
          EXISTING_REFS=$(git ls-remote --heads | grep refs/heads/auto-bump-) 
          for CLOSED_BRANCH in $CLOSED_BRANCH_NAMES; do
            if echo "$EXISTING_REFS" | grep -q "$CLOSED_BRANCH" ; then
              # If the branch still exists then we will delete it
              gh api  /repos/flutter/devtools/git/refs/heads/$CLOSED_BRANCH -X DELETE
            fi
          done