# Cuts a BCQuality content release on demand (roughly monthly), NOT on every
# commit. Run this workflow manually once the `main` content is ready, and choose
# whether to bump the minor (usual periodic content update) or the major
# (breaking change).
#
# The version is a `major.minor` value derived from existing git tags — there is
# no VERSION file. The minor is a monotonic counter: it only ever increments and
# never resets, even across a major bump, so it uniquely identifies a release.
# This workflow computes the next version and tags the current commit as
# `v{major}.{minor}`.

name: Release version

on:
  workflow_dispatch:
    inputs:
      bump:
        description: Which part to bump
        type: choice
        options:
          - minor
          - major
        default: minor

# Only tag creation needs write.
permissions:
  contents: write

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

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Compute and tag release
        shell: bash
        run: |
          git fetch --tags --force --quiet
          tags="$(git tag -l | grep -E '^v[0-9]+\.[0-9]+$' || true)"

          if [[ -z "$tags" ]]; then
            # First release.
            major=1
            minor=0
          else
            latest_major="$(printf '%s\n' "$tags" | sed -E 's/^v([0-9]+)\..*/\1/' | sort -n | tail -1)"
            latest_minor="$(printf '%s\n' "$tags" | sed -E 's/^v[0-9]+\.([0-9]+)$/\1/' | sort -n | tail -1)"
            minor=$(( latest_minor + 1 ))   # monotonic, never resets
            if [[ "${{ inputs.bump }}" == "major" ]]; then
              major=$(( latest_major + 1 ))
            else
              major="$latest_major"
            fi
          fi

          tag="v${major}.${minor}"
          if git rev-parse -q --verify "refs/tags/${tag}" >/dev/null; then
            echo "::error::Tag ${tag} already exists"
            exit 1
          fi
          git tag "$tag" "${{ github.sha }}"
          git push origin "$tag"
          echo "Released BCQuality ${tag} at ${{ github.sha }}"