action.yml

name: 'get_git_diff_files'
description: 'Get names of files that are different between git branches'

inputs:

  result_env_var:
    description: 'Environment Variable name for result'
    required: true

  head_ref:
    description: 'Reference to Git Head to compare with'
    required: true

  base_ref:
    description: 'Reference to Git current'
    required: true

  grep_args:
    description: 'Arguments to filter the result'
    required: false
    default: ''

  workspace:
    description: 'Workspace where the git project is'
    required: false
    default: '/.'

  add_deleted:
    description: 'Wether to add in list result those files that have been removed'
    required: false
    default: false

runs:
  using: composite
  steps:

    - name: get_git_diff_files
      run: |

        echo "::group::Get git modified files in ${{ inputs.workspace }}"

        if [ "${{ inputs.add_deleted }}" == "true" ]; then
          export GIT_FLAGS_=""
        else
          export GIT_FLAGS_="--diff-filter=d"
        fi

        cd ${{ inputs.workspace }}
        echo "${{ inputs.result_env_var }}=$(git diff --name-only ${{ inputs.base_ref }} ${{ inputs.head_ref }} ${GIT_FLAGS_} | grep ${{ inputs.grep_args }} | tr '\n' ' ')" >> $GITHUB_ENV

        echo "::endgroup::"

      shell: bash