name: Release

# Manually triggered. Bumps the version (patch, minor or major), regenerates
# the amalgamated fast_float.h, runs the tests, commits the version bump to
# main, tags it and publishes a GitHub release with fast_float.h attached.
#
# Releases created with GITHUB_TOKEN do not trigger other workflows, so
# on-release.yml does not run for releases made here.

'on':
  workflow_dispatch:
    inputs:
      bump:
        description: 'Which part of the version to bump'
        required: true
        default: 'patch'
        type: choice
        options:
          - patch
          - minor
          - major

permissions:
  contents: write

concurrency:
  group: release
  cancel-in-progress: false

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
        with:
          ref: main
          fetch-depth: 0

      - name: Compute new version
        id: version
        run: |
          current=$(git describe --abbrev=0 --tags)
          current=${current#v}
          IFS=. read -r major minor patch <<< "$current"
          case "${{ inputs.bump }}" in
            major) major=$((major + 1)); minor=0; patch=0 ;;
            minor) minor=$((minor + 1)); patch=0 ;;
            patch) patch=$((patch + 1)) ;;
            *) echo "unknown bump type"; exit 1 ;;
          esac
          new="$major.$minor.$patch"
          echo "current=$current" >> "$GITHUB_OUTPUT"
          echo "new=$new" >> "$GITHUB_OUTPUT"
          echo "Releasing $current -> $new (${{ inputs.bump }})"

      - name: Bump version files and amalgamate
        run: |
          new="${{ steps.version.outputs.new }}"
          IFS=. read -r major minor patch <<< "$new"
          python3 script/release.py "$new"
          rm -f CMakeLists.txt.bak README.md.bak MODULE.bazel.bak \
                include/fast_float/float_common.h.bak
          grep -q "project(fast_float VERSION $new LANGUAGES CXX)" CMakeLists.txt
          grep -q "#define FASTFLOAT_VERSION_MAJOR $major$" include/fast_float/float_common.h
          grep -q "#define FASTFLOAT_VERSION_MINOR $minor$" include/fast_float/float_common.h
          grep -q "#define FASTFLOAT_VERSION_PATCH $patch$" include/fast_float/float_common.h
          grep -q "version = \"$new\"," MODULE.bazel
          grep -q "releases/download/v$new/fast_float.h" README.md
          grep -q "#define FASTFLOAT_VERSION_PATCH $patch$" fast_float.h

      - name: Test amalgamation
        run: |
          mkdir -p amalgamation/fast_float
          cp fast_float.h amalgamation/fast_float/
          g++ -O2 -std=c++17 -Iamalgamation -o amalgamation/string_test tests/string_test.cpp
          ./amalgamation/string_test

      - name: Build and test
        run: |
          cmake -B build -DFASTFLOAT_TEST=ON -DCMAKE_CXX_FLAGS='-Werror -Wundef'
          cmake --build build --parallel
          ctest --test-dir build --output-on-failure

      - name: Commit, tag and push
        run: |
          new="${{ steps.version.outputs.new }}"
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add CMakeLists.txt README.md MODULE.bazel include/fast_float/float_common.h
          git commit -m "Version $new"
          git tag -a "v$new" -m "version $new"
          git push origin main
          git push origin "v$new"

      - name: Create GitHub release
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          new="${{ steps.version.outputs.new }}"
          gh release create "v$new" \
            --title "Version $new" \
            --generate-notes \
            --notes-start-tag "v${{ steps.version.outputs.current }}" \
            fast_float.h