feat: support filename and extension vars in summary (#3375)

packages/netlify-cms-core/src/lib/__tests__/formatters.spec.js

@@ -358,6 +358,19 @@ describe('formatters', () => {
 
       expect(summaryFormatter('{{title}}-{{year}}', entry, collection)).toBe('title-2020');
     });
+
+    it('should handle filename and extension variables', () => {
+      const { selectInferedField } = require('../../reducers/collections');
+      selectInferedField.mockReturnValue('date');
+
+      const date = new Date('2020-01-02T13:28:27.679Z');
+      const entry = fromJS({ path: 'post.md', data: { date, title: 'title' } });
+      const collection = fromJS({ fields: [{ name: 'date', widget: 'date' }] });
+
+      expect(
+        summaryFormatter('{{title}}-{{year}}-{{filename}}.{{extension}}', entry, collection),
+      ).toBe('title-2020-post.md');
+    });
   });
 
   describe('folderFormatter', () => {

packages/netlify-cms-core/src/lib/formatters.ts

@@ -200,9 +200,11 @@ export const summaryFormatter = (
   entry: EntryMap,
   collection: Collection,
 ) => {
-  const entryData = entry.get('data');
+  let entryData = entry.get('data');
   const date = parseDateFromEntry(entry, collection) || null;
   const identifier = entryData.getIn(keyToPathArray(selectIdentifier(collection) as string));
+
+  entryData = addFileTemplateFields(entry.get('path'), entryData);
   const summary = compileStringTemplate(summaryTemplate, date, identifier, entryData);
   return summary;
 };

website/content/docs/configuration-options.md

@@ -284,7 +284,7 @@ A string representing the path where content in this collection can be found on
 
 Template tags are the same as those for [slug](#slug), with the following exceptions:
 
-* `{{slug}}` is the entire slug for the current entry (not just the url-safe identifier, as is the   case with [`slug` configuration](#slug)
+* `{{slug}}` is the entire slug for the current entry (not just the url-safe identifier, as is the case with [`slug` configuration](#slug))
 * The date based template tags, such as `{{year}}` and `{{month}}`, are pulled from a date field in your entry, and may require additional configuration - see [`preview_path_date_field`](#preview_path_date_field) for details. If a date template tag is used and no date can be found, `preview_path` will be ignored.
 * `{{filename}}` The file name without the extension part.
 * `{{extension}}` The file extension.
@@ -358,7 +358,14 @@ This setting changes options for the editor view of the collection. It has one o
 
 ### `summary`
 
-This setting allows the customisation of the collection list view. Similar to the `slug` field, a string with templates can be used to include values of different fields, e.g. `{{title}}`. This option over-rides the default of `title` field and `identifier_field`.
+This setting allows the customization of the collection list view. Similar to the `slug` field, a string with templates can be used to include values of different fields, e.g. `{{title}}`. This option over-rides the default of `title` field and `identifier_field`.
+
+**Available template tags:**
+
+Template tags are the same as those for [slug](#slug), with the following additions:
+
+* `{{filename}}` The file name without the extension part.
+* `{{extension}}` The file extension.
 
 **Example**