name: Changed files
description: Get all changed files
author: tj-actions
inputs:
  separator:
    description: 'Split character for array output'
    required: true
    default: " "
  files:
    description: 'Check for file changes for all files listed (Defaults to the entire repo)'
    required: false
    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 }}
  all_modified_files:
    description: List of all copied modified and added files
    value: ${{ steps.changed_files.outputs.all_modified_files }}

runs:
  using: 'composite'
  steps:
    - id: changed_files
      run: |
        echo "Getting head sha..."

        if [[ -z $GITHUB_BASE_REF ]]; then
          HEAD_SHA=$(git rev-parse HEAD^1 || true)
        else
          TARGET_BRANCH=${GITHUB_BASE_REF}
          git fetch --depth=1 origin ${TARGET_BRANCH}:${TARGET_BRANCH}
          HEAD_SHA=$(git rev-parse ${TARGET_BRANCH} || true)
        fi

        if [[ -z "${{ inputs.files }}" ]]; then

          echo "Getting diff..."

          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=$(git diff --diff-filter='*ACDMRTUX' --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
          ALL_MODIFIED_FILES=$(git diff --diff-filter='ACM' --name-only "$HEAD_SHA" | tr "\n" "${{ inputs.separator }}" | sed -E 's/(${{ inputs.separator }})$//')
        
          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::$ALL_CHANGED"
          echo "::set-output name=all_modified_files::$ALL_MODIFIED_FILES"

        else
          ADDED_FILES=()
          COPIED_FILES=()
          DELETED_FILES=()
          MODIFIED_FILES=()
          RENAMED_FILES=()
          CHANGED_FILES=()
          UNMERGED_FILES=()
          UNKNOWN_FILES=()
          ALL_CHANGED=()
          ALL_MODIFIED_FILES=()

          for path in ${INPUT_FILES}
          do
            echo "Checking for file changes: \"${path}\"..."

            ADDED_FILES+=$(git diff --diff-filter=A --name-only "$HEAD_SHA" | grep -E "(${path})")
            COPIED_FILES+=$(git diff --diff-filter=C --name-only "$HEAD_SHA" | grep -E "(${path})")
            DELETED_FILES+=$(git diff --diff-filter=D --name-only "$HEAD_SHA" | grep -E "(${path})")
            MODIFIED_FILES+=$(git diff --diff-filter=M --name-only "$HEAD_SHA" | grep -E "(${path})")
            RENAMED_FILES+=$(git diff --diff-filter=R --name-only "$HEAD_SHA" | grep -E "(${path})")
            CHANGED_FILES+=$(git diff --diff-filter=T --name-only "$HEAD_SHA" | grep -E "(${path})")
            UNMERGED_FILES+=$(git diff --diff-filter=U --name-only "$HEAD_SHA" | grep -E "(${path})")
            UNKNOWN_FILES+=$(git diff --diff-filter=X --name-only "$HEAD_SHA" | grep -E "(${path})")
            ALL_CHANGED+=$(git diff --diff-filter='*ACDMRTUX' --name-only "$HEAD_SHA" | grep -E "(${path})")
            ALL_MODIFIED_FILES+=$(git diff --diff-filter='ACM' --name-only "$HEAD_SHA" | grep -E "(${path})")

          done

          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::$ALL_CHANGED"
          echo "::set-output name=all_modified_files::$ALL_MODIFIED_FILES"
        fi
      shell: bash

branding:
  icon: file-text
  color: white