feat: add support for writing outputs to files (#890)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

action.yml

@@ -88,6 +88,14 @@ inputs:
     description: "Use the last commit on the remote branch as the `base_sha`. Defaults to the last non merge commit on the target branch for pull request events and the previous remote commit of the current branch for push events."
     required: true
     default: "false"
+  write_output_files:
+    description: "Write outputs to files in the `.github/outputs` folder by default."
+    required: false
+    default: "false"
+  output_dir:
+    description: "Directory to store output files."
+    required: false
+    default: ".github/outputs"
 
 outputs:
   added_files:
@@ -230,6 +238,36 @@ runs:
         INPUT_DIR_NAMES_MAX_DEPTH: ${{ inputs.dir_names_max_depth }}
         INPUT_JSON: ${{ inputs.json }}
         INPUT_HAS_CUSTOM_PATTERNS: ${{ steps.glob.outputs.has-custom-patterns }}
+    - name: Generate output files
+      uses: tj-actions/json2file@v1
+      if: inputs.write_output_files == 'true'
+      with:
+        outputs: ${{ toJSON(steps.changed-files.outputs) }}
+        directory: ${{ inputs.output_dir }}
+        skip_missing_keys: true
+        keys: |
+          added_files
+          copied_files
+          deleted_files
+          modified_files
+          renamed_files
+          all_old_new_renamed_files
+          type_changed_files
+          unmerged_files
+          unknown_files
+          all_changed_and_modified_files
+          all_changed_files
+          any_changed
+          only_changed
+          other_changed_files
+          all_modified_files
+          any_modified
+          only_modified
+          other_modified_files
+          any_deleted
+          only_deleted
+          other_deleted_files
+        extension: ${{ steps.changed-files.outputs.outputs_extension }}
 
 branding:
   icon: file-text