feat: allow custom fields inside git commit message

packages/core/src/backend.ts

@@ -1118,6 +1118,7 @@ export class Backend<EF extends BaseField = UnknownField, BC extends BackendClas
         path,
         authorLogin: user.login,
         authorName: user.name,
+        data: entryDraft.entry.data,
       },
       user.useOpenAuthoring,
     );

packages/core/src/lib/formatters.ts

@@ -9,6 +9,7 @@ import { isEmpty } from './util/string.util';
 import {
   addFileTemplateFields,
   compileStringTemplate,
+  getExplicitFieldReplacement,
   keyToPathArray,
   parseDateFromEntry,
 } from './widgets/stringTemplate';
@@ -41,16 +42,17 @@ type Options<EF extends BaseField> = {
   collection?: CollectionWithDefaults<EF>;
   authorLogin?: string;
   authorName?: string;
+  data?: EntryData;
 };
 
 export function commitMessageFormatter<EF extends BaseField>(
   type: keyof typeof commitMessageTemplates,
   config: ConfigWithDefaults<EF>,
-  { slug, path, collection, authorLogin, authorName }: Options<EF>,
+  { slug, path, collection, authorLogin, authorName, data }: Options<EF>,
   isOpenAuthoring?: boolean,
 ) {
   const templates = { ...commitMessageTemplates, ...(config.backend.commit_messages || {}) };
-
+  let explicitReplacement;
   const commitMessage = templates[type].replace(variableRegex, (_, variable) => {
     switch (variable) {
       case 'slug':
@@ -64,6 +66,10 @@ export function commitMessageFormatter<EF extends BaseField>(
       case 'author-name':
         return authorName || '';
       default:
+        explicitReplacement = getExplicitFieldReplacement(variable, data);
+        if (explicitReplacement) {
+          return explicitReplacement;
+        }
         console.warn(
           `[StaticCMS] Ignoring unknown variable “${variable}” in commit message template.`,
         );

packages/core/src/lib/widgets/stringTemplate.ts

@@ -187,7 +187,7 @@ export function expandPath({
 
 // Allow `fields.` prefix in placeholder to override built in replacements
 // like "slug" and "year" with values from fields of the same name.
-function getExplicitFieldReplacement(key: string, data: ObjectValue | undefined | null) {
+export function getExplicitFieldReplacement(key: string, data: ObjectValue | undefined | null) {
   if (!key.startsWith(FIELD_PREFIX)) {
     return;
   }

packages/docs/content/docs/configuration-options.mdx

@@ -68,8 +68,8 @@ Static CMS generates the following commit types:
 
 | Commit type   | When is it triggered?        | Available template tags                                     |
 | ------------- | ---------------------------- | ----------------------------------------------------------- |
-| `create`      | A new entry is created       | `slug`, `path`, `collection`, `author-login`, `author-name` |
-| `update`      | An existing entry is changed | `slug`, `path`, `collection`, `author-login`, `author-name` |
+| `create`      | A new entry is created       | `slug`, `path`, `collection`, `author-login`, `author-name`, `fields` |
+| `update`      | An existing entry is changed | `slug`, `path`, `collection`, `author-login`, `author-name`, `fields` |
 | `delete`      | An existing entry is deleted | `slug`, `path`, `collection`, `author-login`, `author-name` |
 | `uploadMedia` | A media file is uploaded     | `path`, `author-login`, `author-name`                       |
 | `deleteMedia` | A media file is deleted      | `path`, `author-login`, `author-name`                       |
@@ -83,6 +83,7 @@ Template tags produce the following output:
 - `{{path}}`: full path to the changed file
 - `{{author-login}}`: login/username of the author
 - `{{author-name}}`: full name of the author (might be empty based on the user's profile)
+- `{{fields.[FIELD_NAME]}}`: A custom fields value
 
 ## Publish Mode