# The purpose of this workflow is to, once a month, trigger Wasmtime's release
# process. All that actually happens here is that whenever this is triggered it
# will send a PR to the main repository with the version numbers automatically
# bumped. The next stage of the process is to simply merge the PR, and the
# `push-tag.yml` process takes over from there.
#
# Note that this creates a commit and a PR with a personal access token to
# ensure that the PR gets CI triggered on it. Additionally the commit message
# is specifically worded to get recognized by `push-tag.yml`.

name: "Bump version number"
on:
  schedule:
    # “At 00:00 on day-of-month 5.”
    #
    # https://crontab.guru/#0_0_5_*_*
    - cron: '0 0 5 * *'

  # Allow manually triggering this request via the button at
  # https://github.com/bytecodealliance/wasmtime/actions/workflows/bump-version.yml
  workflow_dispatch:
    inputs:
      publish_cmd:
        description: 'Publish script argument: "bump" or "bump-patch"'
        required: false
        default: 'bump'

jobs:
  bump_version:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true
      - run: rustup update stable && rustup default stable
      - name: Bump versions locally
        id: bump
        run: |
          rustc scripts/publish.rs
          if [ "${{ github.event.inputs.publish_cmd }}" != "" ]; then
            # this was manually triggered
            ./publish ${{ github.event.inputs.publish_cmd }}
          else
            # this was cron-triggered.
            ./publish bump
          fi
          version=$(grep '^version =' Cargo.toml | head -n 1 | sed 's/.*"\(.*\)"/\1/')
          echo "::set-output name=version::$version"

      - name: Commit version changes
        run: |
          git config user.name 'Wasmtime Publish'
          git config user.email 'wasmtime-publish@users.noreply.github.com'
          git commit -a -F-<<EOF
          Bump Wasmtime to ${{ steps.bump.outputs.version }}

          [automatically-tag-and-release-this-commit]
          EOF

      - name: Push to remote
        run: |
          git remote set-url origin https://git:${{ secrets.PERSONAL_ACCESS_TOKEN }}@github.com/${{ github.repository }}
          git push origin HEAD:ci/bump-to-${{ steps.bump.outputs.version }} -f

      - name: Make a PR
        # Note that the syntax here is kinda funky, and the general gist is that
        # I couldn't figure out a good way to have a multiline string-literal
        # become a json-encoded string literal to send to GitHub. This
        # represents my best attempt.
        run: |
          cat > pr-body <<-EOF
          This is an automated pull request from CI which is intended to
          notify maintainers that it's time to release Wasmtime version
          ${{ steps.bump.outputs.version }}. Version numbers have been bumped
          in this PR automatically and the release process will automatically
          enter the next stages once this PR is merged.

          It's recommended that maintainers double-check that [RELEASES.md]
          is up-to-date. If not please feel free to push to this PR any
          modifications to the release notes. Additionally before merging it's
          probably best to double-check the [release process] and make sure that
          everything is ship-shape.

          [RELEASES.md]: https://github.com/bytecodealliance/wasmtime/blob/main/RELEASES.md
          [release process]: https://docs.wasmtime.dev/contributing-release-process.html
          EOF
          body=$(jq -sR < ./pr-body)

          curl --include --request POST \
            https://api.github.com/repos/${{ github.repository }}/pulls \
            --header "Authorization: token ${{ secrets.PERSONAL_ACCESS_TOKEN }}" \
            --data @- << EOF
          {
            "head": "ci/bump-to-${{ steps.bump.outputs.version }}",
            "base": "${{ github.ref_name }}",
            "title": "Release Wasmtime ${{ steps.bump.outputs.version }}",
            "body": $body,
            "maintainer_can_modify": true

          }
          EOF