check-semver.yml

name: Check semver

on:
  pull_request:
    types: [opened, synchronize, reopened, ready_for_review]
  workflow_dispatch:

concurrency:
  group: check-semver-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

env:
  TOOLCHAIN: nightly-2024-06-01

jobs:
  preflight:
    uses: ./.github/workflows/reusable-preflight.yml
  check-semver:
    runs-on: ubuntu-latest
    timeout-minutes: 90
    needs: [preflight]
    container:
      image: ${{ needs.preflight.outputs.IMAGE }}
    steps:
      - uses: actions/checkout@6d193bf28034eafb982f37bd894289fe649468fc # v4.1.7
        with:
          fetch-depth: 2

      - name: extra git setup
        run: |
          git config --global --add safe.directory '*'

          git branch old HEAD^1

      - name: Comment If Backport
        if: ${{ startsWith(github.event.pull_request.base.ref, 'stable') }}
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PR: ${{ github.event.pull_request.number }}
        run: |
          echo "This is a backport into stable."

            cat > msg.txt <<EOF
            This pull request is amending an existing release. Please proceed with extreme caution,
            as to not impact downstream teams that rely on the stability of it. Some things to consider:
            - Backports are only for 'patch' or 'minor' changes. No 'major' or other breaking change.
            - Should be a legit *fix* for some  bug, not adding tons of new features.
            - Must either be already audited or not need an audit.

            <details><summary><i>Emergency Bypass</i></summary>
            <p>

            If you really need to bypass this check: add <code>validate: false</code> to each crate
            in the Prdoc where a breaking change is introduced. This will release a new major
            version of that crate and all its reverse dependencies and basically break the release.

            </p>
            </details> 
          EOF
          gh issue comment $PR --edit-last -F msg.txt || gh issue comment $PR -F msg.txt

          echo "PRDOC_EXTRA_ARGS=--max-bump minor" >> $GITHUB_ENV

      - name: Rust Cache
        uses: Swatinem/rust-cache@82a92a6e8fbeee089604da2575dc567ae9ddeaab # v2.7.5
        with:
          cache-on-failure: true

      - name: Rust compilation prerequisites
        run: |
          rustup default $TOOLCHAIN
          rustup component add rust-src --toolchain $TOOLCHAIN

      - name: install parity-publish
        # Set the target dir to cache the build.
        run: CARGO_TARGET_DIR=./target/ cargo install parity-publish@0.8.0 --locked -q

      - name: check semver
        run: |
          export CARGO_TARGET_DIR=target
          export RUSTFLAGS='-A warnings -A missing_docs'
          export SKIP_WASM_BUILD=1

          if ! parity-publish --color always prdoc --since old --validate prdoc/pr_$PR.prdoc $PRDOC_EXTRA_ARGS -v --toolchain $TOOLCHAIN; then

            cat <<EOF
          👋 Hello developer! The SemVer information that you declared in the prdoc file did not match what the CI detected.

          Please check the output above and see the following links for more help:
          - https://github.com/paritytech/polkadot-sdk/blob/master/docs/contributor/prdoc.md#record-semver-changes
          - https://forum.polkadot.network/t/psa-polkadot-sdk-to-use-semver

          Otherwise feel free to ask in the Merge Request or in Matrix chat.
          EOF

            exit 1
          fi
        env:
          PR: ${{ github.event.pull_request.number }}
          PRDOC_EXTRA_ARGS: ${{ env.PRDOC_EXTRA_ARGS }}