cargo-publish.yml

name: Cargo Publish

on:
  release:
    types: [published]

jobs:
  publish:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable

      - name: Extract versions
        id: versions
        run: |
          TAG="${GITHUB_REF_NAME}"          # v0.1.2
          TAG_VER="${TAG#v}"
          CARGO_VER=$(grep '^version' Cargo.toml | head -1 | cut -d'"' -f2)

          echo "tag_ver=$TAG_VER" >> $GITHUB_OUTPUT
          echo "cargo_ver=$CARGO_VER" >> $GITHUB_OUTPUT

      - name: Verify tag matches Cargo.toml
        run: |
          test "${{ steps.versions.outputs.tag_ver }}" = "${{ steps.versions.outputs.cargo_ver }}"

      - name: Cargo login
        run: cargo login ${{ secrets.CARGO_REGISTRY_TOKEN }}

      - name: Publish to crates.io
        run: cargo publish --locked