release-prepare.yml

name: Prepare Release

on:
  workflow_dispatch:
    inputs:
      version:
        description: "Version bump: patch, minor, major, or explicit (e.g. 1.2.3)"
        required: true
        type: string

jobs:
  prepare:
    name: Create Release PR
    runs-on: ubuntu-latest
    if: github.repository_owner == 'LeagueToolkit'
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Resolve version
        id: version
        shell: bash
        run: |
          INPUT="${{ inputs.version }}"
          CURRENT=$(node -p "require('./package.json').version")
          IFS='.' read -r MAJ MIN PAT <<< "$CURRENT"

          case "$INPUT" in
            patch) VERSION="$MAJ.$MIN.$((PAT + 1))" ;;
            minor) VERSION="$MAJ.$((MIN + 1)).0" ;;
            major) VERSION="$((MAJ + 1)).0.0" ;;
            *)
              if [[ ! "$INPUT" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?$ ]]; then
                echo "::error::Invalid version: $INPUT (expected patch, minor, major, or semver like 1.2.3)"
                exit 1
              fi
              VERSION="$INPUT"
              ;;
          esac

          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "::notice::Preparing release v$VERSION (current: $CURRENT)"

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

      - name: Bump versions and create PR
        shell: bash
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          BRANCH="release/v$VERSION"

          node -e "
            const fs = require('fs');
            const pkg = JSON.parse(fs.readFileSync('package.json', 'utf8'));
            pkg.version = '$VERSION';
            fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2) + '\n');
          "

          sed -i "0,/^version = \".*\"/s//version = \"$VERSION\"/" src-tauri/Cargo.toml
          cargo generate-lockfile

          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git checkout -b "$BRANCH"
          git add package.json src-tauri/Cargo.toml Cargo.lock
          git commit -m "chore: release v$VERSION"
          git push origin "$BRANCH"

          gh pr create \
            --title "chore: release v$VERSION" \
            --body "Bumps version to **v$VERSION** in \`package.json\` and \`Cargo.toml\`." \
            --base main \
            --head "$BRANCH"