simulacra 0.1.0

name: Release

# Triggered by pushing a `v*.*.*` tag whose value matches the version
# in Cargo.toml. The workflow verifies the tag, runs the full test
# suite, and publishes to crates.io. The CRATES_IO_TOKEN secret must
# be configured on the repository (Settings → Secrets and variables →
# Actions). The "crates-io" environment can additionally gate this
# behind a manual approval if you want a sanity check before publish.

on:
  push:
    tags:
      - "v*.*.*"

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: "-D warnings"

jobs:
  verify-tag:
    name: verify tag matches Cargo.toml
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Check tag matches Cargo.toml version
        run: |
          tag="${GITHUB_REF#refs/tags/v}"
          cargo_version=$(grep '^version' Cargo.toml | head -1 | sed -E 's/.*"(.+)".*/\1/')
          if [ "$tag" != "$cargo_version" ]; then
            echo "::error::Tag v$tag does not match Cargo.toml version $cargo_version"
            exit 1
          fi
          echo "Tag v$tag matches Cargo.toml version $cargo_version"

  test:
    name: full test suite
    runs-on: ubuntu-latest
    needs: verify-tag
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - run: cargo test --locked --all-targets --all-features
      - run: cargo test --locked --doc --all-features

  publish:
    name: publish to crates.io
    runs-on: ubuntu-latest
    needs: test
    environment: crates-io
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - name: cargo publish (skip if version already on crates.io)
        env:
          CARGO_REGISTRY_TOKEN: ${{ secrets.CRATES_IO_TOKEN }}
        run: |
          version="${GITHUB_REF#refs/tags/v}"
          # crates.io returns 200 for an existing crate@version, 404 if
          # not yet published. A User-Agent is required or it 403s.
          # This makes a manual first publish + tag push idempotent:
          # 0.1.0 published from a workstation, later 0.1.x cut by CI.
          code=$(curl -sSL -o /dev/null -w '%{http_code}' \
            -H 'User-Agent: simulacra-release-ci (https://github.com/jbravar/simulacra)' \
            "https://crates.io/api/v1/crates/simulacra/${version}")
          if [ "$code" = "200" ]; then
            echo "simulacra ${version} is already on crates.io — skipping publish."
          else
            echo "simulacra ${version} not found (HTTP ${code}) — publishing."
            cargo publish --locked
          fi