action.yml

name: 'Patch Go'
description: 'Patch Go!'
inputs:
  patch-repo:
    description: 'Repository containing the patched Go source (e.g., username/go)'
    default: 'DefinedNet/go'
  patch-ref:
    description: 'Branch, tag, or commit SHA of the patched version'
    required: true
  cache-key-suffix:
    description: 'Optional suffix for cache key'
    required: false
    default: ''

runs:
  using: "composite"
  steps:
    - name: Set up cache key
      id: cache-key
      shell: bash
      run: |
        CACHE_KEY="patched-go-${{ inputs.patch-ref }}-${{ runner.os }}-${{ runner.arch }}"
        if [ -n "${{ inputs.cache-key-suffix }}" ]; then
          CACHE_KEY="${CACHE_KEY}-${{ inputs.cache-key-suffix }}"
        fi
        echo "key=${CACHE_KEY}" >> $GITHUB_OUTPUT

    - name: Cache patched Go installation
      id: cache-go
      uses: actions/cache@v4
      with:
        path: ~/patched-go
        key: ${{ steps.cache-key.outputs.key }}

    - name: Verify build tools
      if: steps.cache-go.outputs.cache-hit != 'true'
      shell: bash
      run: |
        if ! command -v clang &> /dev/null; then
          echo "Error: clang not found. Xcode Command Line Tools may not be installed."
          exit 1
        fi
        echo "Build tools verified"

    - name: Install bootstrap Go compiler
      if: steps.cache-go.outputs.cache-hit != 'true'
      uses: actions/setup-go@v5
      with:
        go-version: '1.25'

    - name: Clone patched Go source
      if: steps.cache-go.outputs.cache-hit != 'true'
      shell: bash
      run: |
        git clone https://github.com/${{ inputs.patch-repo }}.git ~/go-source
        cd ~/go-source
        git checkout ${{ inputs.patch-ref }}

    - name: Build patched Go
      if: steps.cache-go.outputs.cache-hit != 'true'
      shell: bash
      run: |
        cd ~/go-source/src
        ./make.bash
        mkdir -p ~/patched-go
        cp -r ~/go-source/* ~/patched-go/

    - name: Add patched Go to PATH
      shell: bash
      run: |
        echo "$HOME/patched-go/bin" >> $GITHUB_PATH
        echo "GOROOT=$HOME/patched-go" >> $GITHUB_ENV
        # Add GOPATH/bin to PATH (where go install puts binaries)
        echo "$HOME/go/bin" >> $GITHUB_PATH
        echo "GOPATH=$HOME/go" >> $GITHUB_ENV

    - name: Verify installation
      shell: bash
      run: |
        go version
        go env GOROOT
        go env GOARCH
        go env GOOS

    - name: Clean up
      shell: bash
      if: steps.cache-go.outputs.cache-hit != 'true'
      run: |
        rm -rf ~/go-source