name: Diff changed files
description: Diff changed files
author: tj-actions
inputs:
  separator:
    description: 'Split character for array output'
    required: true
    default: " "

outputs:
  added_files:
    description: List of added files.
    value: ${{ steps.changed-files.outputs.added_files }}
  copied_files:
    description: List of copied files.
    value: ${{ steps.changed-files.outputs.copied_files }}
  deleted_files:
    description: List of deleted files.
    value: ${{ steps.changed-files.outputs.deleted_files }}
  modified_files:
    description: List of modified files.
    value: ${{ steps.changed-files.outputs.modified_files }}
  renamed_files:
    description: List of renamed files.
    value: ${{ steps.changed-files.outputs.renamed_files }}
  changed_files:
    description: List of changed files.
    value: ${{ steps.changed-files.outputs.changed_files }}
  unmerged_files:
    description: List of unmerged files.
    value: ${{ steps.changed-files.outputs.unmerged_files }}
  unknown_files:
    description: List of unknown files.
    value: ${{ steps.changed-files.outputs.unknown_files }}
  all_changed_files:
    description: List of all changed files.
    value: ${{ steps.changed-files.outputs.all_changed_files }}

runs:
  using: 'composite'
  steps:
    - id: changed-files
      run: |
        if [[ -z $GITHUB_BASE_REF ]]; then
          echo "Skipping: This should only run on pull_request.";
          exit 0;
        fi

        TARGET_BRANCH=${GITHUB_BASE_REF}
        CURRENT_BRANCH=${GITHUB_HEAD_REF}

        git fetch --depth=1 origin ${TARGET_BRANCH}:${TARGET_BRANCH}

        echo "Getting head sha..."
        
        HEAD_SHA=$(git rev-parse ${TARGET_BRANCH} || true)
        
        ADDED=$(git diff --diff-filter=A --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        COPIED=$(git diff --diff-filter=C --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        DELETED=$(git diff --diff-filter=D --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        MODIFIED=$(git diff --diff-filter=M --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        RENAMED=$(git diff --diff-filter=R --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        CHANGED=$(git diff --diff-filter=T --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        UNMERGED=$(git diff --diff-filter=U --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        UNKNOWN=$(git diff --diff-filter=X --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        ALL_CHANGED=$(git diff --diff-filter='*' --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')

        echo "Getting diff..."
        echo "::set-output name=added_files::$ADDED"
        echo "::set-output name=copied_files::$COPIED"
        echo "::set-output name=deleted_files::$DELETED"
        echo "::set-output name=modified_files::$MODIFIED"
        echo "::set-output name=renamed_files::$RENAMED"
        echo "::set-output name=changed_files::$CHANGED"
        echo "::set-output name=unmerged_files::$UNMERGED"
        echo "::set-output name=unknown_files::$UNKNOWN"
        echo "::set-output name=all_changed_files::$ALL_CHANGED"
      shell: bash

branding:
  icon: git-pull-request
  color: white