name: MSRV Bump

on:
  schedule:
    # Weekly on Monday at 9am UTC
    - cron: '0 9 * * 1'
  workflow_dispatch: {}

permissions: {}

jobs:
  check-msrv:
    runs-on: ubuntu-latest
    container: registry.access.redhat.com/ubi9/ubi:latest
    permissions:
      contents: write # Required to create branch for PR
      pull-requests: write # Required to create PR
    steps:
      - name: Install tools
        run: dnf install -y git
      - name: Configure git
        run: git config --global --add safe.directory '*'
      - name: Checkout
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Get current MSRV
        id: current
        run: |
          msrv=$(grep '^rust-version' Cargo.toml | sed 's/.*"\(.*\)"/\1/')
          echo "Current MSRV: ${msrv}"
          echo "msrv=${msrv}" >> "${GITHUB_OUTPUT}"

      - name: Get RHEL 9 Rust version
        id: rhel9
        run: |
          version=$(dnf repoquery --quiet --latest-limit=1 --qf '%{version}' rust)
          echo "RHEL 9 Rust version: ${version}"
          echo "version=${version}" >> "${GITHUB_OUTPUT}"

      - name: Update Cargo.toml
        if: steps.current.outputs.msrv != steps.rhel9.outputs.version
        env:
          RHEL9_RUST_VERSION: ${{ steps.rhel9.outputs.version }}
        run: |
          sed --sandbox -i -e "s/^rust-version = \".*\"/rust-version = \"${RHEL9_RUST_VERSION}\"/" Cargo.toml

      - name: Create pull request
        if: steps.current.outputs.msrv != steps.rhel9.outputs.version
        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1
        with:
          branch: msrv-bump
          title: "Cargo.toml: bump rust-version to ${{ steps.rhel9.outputs.version }}"
          body: |
            RHEL 9 now ships Rust ${{ steps.rhel9.outputs.version }}.
            Bump the minimum supported Rust version accordingly.

            *This PR was automatically created by the MSRV Bump workflow.*
          commit-message: |
            Cargo.toml: bump rust-version to ${{ steps.rhel9.outputs.version }}

            RHEL 9 now ships Rust ${{ steps.rhel9.outputs.version }}.
            Bump the minimum supported Rust version accordingly.