publish.yml

name: Release & Publish

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  ensure-doc:
    name: Ensure documentation builds
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4.2.2
        with:
          submodules: true

      - uses: IronCoreLabs/rust-toolchain@v1
        with:
          toolchain: nightly

      - uses: dtolnay/install@cargo-docs-rs
      - run: cargo docs-rs

  release:
    name: Release
    runs-on: ubuntu-latest
    needs: ensure-doc
    steps:
      - uses: actions/checkout@v4.2.2
        with:
          submodules: true

      - name: Retreive version from Cargo.toml
        id: new-version
        run: echo "version=$(grep -m1 version Cargo.toml | cut -d '"' -f2)" >> $GITHUB_OUTPUT

      - name: Retreive version from Crates.io
        id: old-version
        run: |
          VERSION=$(curl -s https://crates.io/api/v1/crates/${GITHUB_REPOSITORY#*/} | jq -r '.versions[0].num')
          if [ "$VERSION" == "null" ]; then
            echo "version=" >> $GITHUB_OUTPUT
          else
            echo "version=$VERSION" >> $GITHUB_OUTPUT
          fi

      - name: Compare versions
        id: compare-versions
        # if old-version is empty, then this is the first release
        # else we compare the two versions
        run: echo "should-release=$(if [ -z "${{ steps.old-version.outputs.version }}" ]; then echo true; else if [ "${{ steps.old-version.outputs.version }}" != "${{ steps.new-version.outputs.version }}" ]; then echo true; else echo false; fi; fi)" >> $GITHUB_OUTPUT
      
      # if we are releasing, then can install rust and publish to crates.io
      - name: Install Rust
        if: steps.compare-versions.outputs.should-release == 'true'
        uses: IronCoreLabs/rust-toolchain@v1

      - name: Release
        if: steps.compare-versions.outputs.should-release == 'true'
        uses: katyo/publish-crates@v2
        with:
          registry-token: ${{ secrets.CARGO_REGISTRY_TOKEN }}