bun-version-check.yml

name: bun-version-check
on:
  schedule:
    - cron: "0 6 * * *" # Daily at 06:00 UTC
  workflow_dispatch:
    inputs:
      version:
        description: "Bun version to build (e.g., 1.3.13). Leave empty to auto-detect latest."
        required: false
        type: string

jobs:
  check-version:
    name: Check for new Bun release
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      new_version: ${{ steps.resolve.outputs.new_version }}
      should_build: ${{ steps.resolve.outputs.should_build }}
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Resolve version
        id: resolve
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ] && [ -n "${{ inputs.version }}" ]; then
            VERSION="${{ inputs.version }}"
            echo "Manual dispatch with version: $VERSION"

            # Validate semver format: positive_integer.non_negative_integer.non_negative_integer
            if ! echo "$VERSION" | grep -qE '^[1-9][0-9]*\.[0-9]+\.[0-9]+$'; then
              echo "::error::Invalid version format: $VERSION. Expected semver (e.g., 1.3.13). First segment must be a positive integer."
              exit 1
            fi

            echo "new_version=$VERSION" >> "$GITHUB_OUTPUT"
            echo "should_build=true" >> "$GITHUB_OUTPUT"
          else
            echo "Scheduled run: fetching latest stable Bun release..."

            # Fetch latest stable release (non-prerelease, non-draft) from oven-sh/bun
            LATEST_RELEASE=$(gh api repos/oven-sh/bun/releases \
              --jq '[.[] | select(.prerelease == false and .draft == false and (.tag_name | test("canary") | not))][0].tag_name')

            if [ -z "$LATEST_RELEASE" ]; then
              echo "::error::Failed to fetch latest Bun release from GitHub API"
              exit 1
            fi

            # Strip "bun-v" prefix to get version number
            LATEST_VERSION="${LATEST_RELEASE#bun-v}"
            echo "Latest stable Bun release: $LATEST_VERSION"

            # Read current version from .bun-version file (if it exists)
            CURRENT_VERSION=""
            if [ -f .bun-version ]; then
              CURRENT_VERSION=$(cat .bun-version)
              echo "Current version in repo: $CURRENT_VERSION"
            else
              echo "No .bun-version file found, treating as new"
            fi

            if [ "$LATEST_VERSION" = "$CURRENT_VERSION" ]; then
              echo "Already up to date (v$CURRENT_VERSION). No build needed."
              echo "should_build=false" >> "$GITHUB_OUTPUT"
            else
              echo "New version detected: $LATEST_VERSION (current: ${CURRENT_VERSION:-none})"
              echo "new_version=$LATEST_VERSION" >> "$GITHUB_OUTPUT"
              echo "should_build=true" >> "$GITHUB_OUTPUT"
            fi
          fi

  trigger-build:
    name: Trigger build-layer workflow
    needs: check-version
    if: needs.check-version.outputs.should_build == 'true'
    runs-on: ubuntu-latest
    permissions:
      actions: write
      contents: read
    steps:
      - name: Trigger build-layer workflow
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          VERSION="${{ needs.check-version.outputs.new_version }}"
          echo "Triggering build-layer workflow with version: $VERSION"
          gh workflow run build-layer.yml \
            --repo "${{ github.repository }}" \
            -f version="$VERSION"