action.yml

name: 'go-apidiff'
description: 'Test API compatibility of changes in your Go library'
branding:
  icon: 'code'  
  color: 'blue'
inputs:
  base-ref:
    description: 'Base reference for API compatibility comparison (default: base branch)'
    required: false
    default: "${{ github.event.pull_request.base.sha || github.event.merge_group.base_sha }}"
  version:
    description: 'Version of go-apidiff to use'
    required: false
    default: "latest"
  compare-imports:
    description: 'Compare exported API differences in the imports of the repo.'
    required: false
    default: 'false'
  print-compatible:
    description: 'Print compatible API changes'
    required: false
    default: 'true'
  repo-path:
    description: 'Path to root of git repository to compare'
    required: false
    default: '.'
outputs:
  semver-type:
    description: "Returns the type (patch, minor, major) of the sementic version that would be required if producing a release."
    value: ${{ steps.go-apidiff.outputs.semver-type }}
  output:
    description: "Contains diff output information"
    value: ${{ steps.go-apidiff.outputs.output }}
runs:
  using: 'composite'
  steps:
    - shell: bash
      id: go-apidiff
      run: |
        if [[ "${{ github.repository }}" == "joelanford/go-apidiff" && "${{ inputs.version }}" == "latest" ]]; then
          echo "*** Installing go-apidiff from source ***"
          go install .
        else
          INSTALL_CMD="go install"
          if [[ "$(go version | cut -d' ' -f3 | cut -d'.' -f2 | grep -o -E '[0-9]+' | head -1)" -lt "16" ]]; then
            INSTALL_CMD="go get"
          fi
          DIR=$(mktemp -d)
          (cd ${DIR} && GO111MODULE=on ${INSTALL_CMD} github.com/joelanford/go-apidiff@${{ inputs.version }}) && rmdir ${DIR}
        fi
        set -x
        GOPATH=$(go env GOPATH)
        set +e
        OUTPUT=$($GOPATH/bin/go-apidiff ${{ inputs.base-ref }} --compare-imports=${{ inputs.compare-imports }} --print-compatible=${{ inputs.print-compatible }} --repo-path=${{ inputs.repo-path }})
        GOAPIDIFF_RC=$?
        set -e
        EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
        {
          echo "output<<$EOF"
          echo "$OUTPUT"
          echo "$EOF"
        } >> $GITHUB_OUTPUT
        
        if [ $GOAPIDIFF_RC -eq 0 ]; then
          if [ -z "$OUTPUT" ]; then
            echo "semver-type=patch" >> $GITHUB_OUTPUT
            exit 0
          fi
          echo "semver-type=minor" >> $GITHUB_OUTPUT
          exit 0
        fi
        echo "semver-type=major" >> $GITHUB_OUTPUT
        exit $GOAPIDIFF_RC