cron-update-rust.yml

name: Update rust version
on:
  schedule:
    - cron: "0 0 15 * *" # At 00:00 on day-of-month 15.
  workflow_dispatch: # allows manual triggering
jobs:
  format:
    name: Update rustc
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: tibdex/github-app-token@v2
        id: generate-token
        with:
          app_id: ${{ secrets.APP_ID }}
          private_key: ${{ secrets.APP_PRIVATE_KEY }}
      - uses: crazy-max/ghaction-import-gpg@v6
        with:
          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
          git_user_signingkey: true
          git_commit_gpgsign: true
      - name: Update rust-version to use latest stable
        run: |
          set -x
          # Extract the version from whatever version of the compiler dtolnay/rust-toolchain gives us.
          RUST_VERSION=$(rustc --verbose --version | sed -ne 's/^release: //p')
          # Update the version in the reference file.
          echo "${RUST_VERSION}" > rust-version
          echo "rust_version=${RUST_VERSION}" >> $GITHUB_ENV
          # In case of no new version don't make an empty PR.
          if ! git diff --exit-code > /dev/null; then
              echo "Updated rustc. Opening PR."
              echo "changes_made=true" >> $GITHUB_ENV
          else
              echo "Attempted to update rustc but the latest stable date did not change. Not opening any PR."
              echo "changes_made=false" >> $GITHUB_ENV
          fi
      - name: Create Pull Request
        if: env.changes_made == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          token: ${{ steps.generate-token.outputs.token }}
          author: Github Action <github@bitcoindevkit.org>
          committer: Github Action <github@bitcoindevkit.org>
          branch: create-pull-request/update-rust-version
          title: |
            ci: automated update to rustc ${{ env.rust_version }}
          commit-message: |
            ci: automated update to rustc ${{ env.rust_version }}
          body: |
            Automated update to Github CI workflow `cont_integration.yml` by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action