action.yml

name: Turborepo Diff Check
description: Run a diff check against a specific package and its dependencies in turborepo
branding:
  icon: git-branch
  color: gray-dark
inputs:
  package:
    required: true
  use-last-tag:
    default: false
outputs:
  changed:
    description: "Says whether the package has changed according to its dependencies"
    value: ${{ steps.changedStep.outputs.changed }}
runs:
  using: composite
  steps:
    - uses: actions/checkout@v3
      with:
        fetch-depth: 0
    - name: Check for changes
      id: changedStep
      shell: bash
      run: |
        set +e

        if [ "${{ inputs.use-last-tag }}" = "false" ]; then
          npx turbo-ignore ${{ inputs.package }}
        else
          LAST_TAG=$(git describe --tags --abbrev=0)
          npx turbo-ignore ${{ inputs.package }} --fallback=tags/$LAST_TAG
        fi
        exit_code=$?

        set -e

        if [ $exit_code -eq "1" ]; then
          echo "changed=true" >> $GITHUB_OUTPUT
        else
          echo "changed=false" >> $GITHUB_OUTPUT
        fi