Changelog frontmatter support

examples/vitepress/apexdocs.config.ts

@@ -30,6 +30,13 @@ export default {
     previousVersionDir: 'previous',
     currentVersionDir: 'force-app',
     scope: ['global', 'public', 'protected', 'private', 'namespaceaccessible'],
+    transformChangeLogPage: () => {
+      return {
+        frontmatter: {
+          title: 'Changelog',
+        },
+      };
+    },
   }),
   markdown: defineMarkdownConfig({
     sourceDir: 'force-app',

examples/vitepress/docs/changelog.md

@@ -1,3 +1,7 @@
+---
+title: Changelog
+---
+
 # Changelog
 
 ## New Classes

src/application/generators/changelog.ts

@@ -1,8 +1,14 @@
 import { pipe } from 'fp-ts/function';
-import { PageData, Skip, UnparsedSourceBundle, UserDefinedChangelogConfig } from '../../core/shared/types';
+import {
+  ChangeLogPageData,
+  PageData,
+  Skip,
+  UnparsedSourceBundle,
+  UserDefinedChangelogConfig,
+} from '../../core/shared/types';
 import * as TE from 'fp-ts/TaskEither';
 import { writeFiles } from '../file-writer';
-import { ChangeLogPageData, generateChangeLog } from '../../core/changelog/generate-change-log';
+import { generateChangeLog } from '../../core/changelog/generate-change-log';
 import { FileWritingError } from '../errors';
 import { isSkip } from '../../core/shared/utils';
 

src/core/changelog/__test__/generating-change-log.spec.ts

@@ -1,5 +1,10 @@
-import { UnparsedApexBundle, UnparsedCustomObjectBundle, UnparsedSourceBundle } from '../../shared/types';
-import { ChangeLogPageData, generateChangeLog } from '../generate-change-log';
+import {
+  ChangeLogPageData,
+  UnparsedApexBundle,
+  UnparsedCustomObjectBundle,
+  UnparsedSourceBundle,
+} from '../../shared/types';
+import { generateChangeLog } from '../generate-change-log';
 import { assertEither } from '../../test-helpers/assert-either';
 import { isSkip } from '../../shared/utils';
 import { unparsedFieldBundleFromRawString } from '../../test-helpers/test-data-builders';
@@ -466,4 +471,16 @@ describe('when generating a changelog', () => {
       assertEither(result, (data) => expect((data as ChangeLogPageData).content).toContain('PhotoUrl__c'));
     });
   });
+
+  describe('and a custom hook is provided to customize the frontmatter', () => {
+    it('includes the custom frontmatter', async () => {
+      const hook = () => ({
+        frontmatter: '---\ntitle: Custom Title\n---',
+      });
+
+      const result = await generateChangeLog([], [], { ...config, transformChangeLogPage: hook })();
+
+      assertEither(result, (data) => expect((data as ChangeLogPageData).frontmatter).toContain('title: Custom Title'));
+    });
+  });
 });

src/core/changelog/generate-change-log.ts

@@ -1,6 +1,8 @@
 import {
+  ChangeLogPageData,
   ParsedFile,
   Skip,
+  TransformChangelogPage,
   UnparsedApexBundle,
   UnparsedSourceBundle,
   UserDefinedChangelogConfig,
@@ -12,26 +14,24 @@ import { Changelog, hasChanges, processChangelog, VersionManifest } from './proc
 import { convertToRenderableChangelog, RenderableChangelog } from './renderable-changelog';
 import { CompilationRequest, Template } from '../template';
 import { changelogTemplate } from './templates/changelog-template';
-import { ReflectionErrors } from '../errors/errors';
+import { HookError, ReflectionErrors } from '../errors/errors';
 import { apply } from '#utils/fp';
 import { filterScope } from '../reflection/apex/filter-scope';
-import { isInSource, skip } from '../shared/utils';
+import { isInSource, isSkip, passThroughHook, skip, toFrontmatterString } from '../shared/utils';
 import { reflectCustomFieldsAndObjects } from '../reflection/sobject/reflectCustomFieldsAndObjects';
 import { CustomObjectMetadata } from '../reflection/sobject/reflect-custom-object-sources';
 import { Type } from '@cparra/apex-reflection';
 import { filterApexSourceFiles, filterCustomObjectsAndFields } from '#utils/source-bundle-utils';
 import { CustomFieldMetadata } from '../reflection/sobject/reflect-custom-field-source';
+import { hookableTemplate } from '../markdown/templates/hookable';
 
-export type ChangeLogPageData = {
-  content: string;
-  outputDocPath: string;
-};
+type Config = Omit<UserDefinedChangelogConfig, 'targetGenerator'>;
 
 export function generateChangeLog(
   oldBundles: UnparsedSourceBundle[],
   newBundles: UnparsedSourceBundle[],
-  config: Omit<UserDefinedChangelogConfig, 'targetGenerator'>,
-): TE.TaskEither<ReflectionErrors, ChangeLogPageData | Skip> {
+  config: Config,
+): TE.TaskEither<ReflectionErrors | HookError, ChangeLogPageData | Skip> {
   const convertToPageData = apply(toPageData, config.fileName);
 
   function handleConversion({ changelog, newManifest }: { changelog: Changelog; newManifest: VersionManifest }) {
@@ -51,6 +51,8 @@ export function generateChangeLog(
       newManifest,
     })),
     TE.map(handleConversion),
+    TE.flatMap(transformChangelogPageHook(config)),
+    TE.map(postHookCompile),
   );
 }
 
@@ -106,7 +108,45 @@ function compile(renderable: RenderableChangelog): string {
 
 function toPageData(fileName: string, content: string): ChangeLogPageData {
   return {
+    frontmatter: null,
     content,
     outputDocPath: `${fileName}.md`,
   };
 }
+
+function transformChangelogPageHook(config: Config) {
+  return (page: ChangeLogPageData | Skip) =>
+    TE.tryCatch(
+      () => transformChangelogPage(page, config.transformChangeLogPage),
+      (error) => new HookError(error),
+    );
+}
+
+async function transformChangelogPage(
+  page: ChangeLogPageData | Skip,
+  hook: TransformChangelogPage = passThroughHook,
+): Promise<ChangeLogPageData | Skip> {
+  if (isSkip(page)) {
+    return page;
+  }
+  return {
+    ...page,
+    ...(await hook(page)),
+  };
+}
+
+function postHookCompile(page: ChangeLogPageData | Skip): ChangeLogPageData | Skip {
+  if (isSkip(page)) {
+    return page;
+  }
+  return {
+    ...page,
+    content: Template.getInstance().compile({
+      source: {
+        frontmatter: toFrontmatterString(page.frontmatter),
+        content: page.content,
+      },
+      template: hookableTemplate,
+    }),
+  };
+}

src/core/markdown/generate-docs.ts

@@ -1,12 +1,10 @@
 import { pipe } from 'fp-ts/function';
 import * as TE from 'fp-ts/TaskEither';
-import yaml from 'js-yaml';
 
 import { apply } from '#utils/fp';
 import {
   DocPageData,
   DocumentationBundle,
-  Frontmatter,
   PostHookDocumentationBundle,
   ReferenceGuidePageData,
   UnparsedApexBundle,
@@ -28,7 +26,7 @@ import { filterScope } from '../reflection/apex/filter-scope';
 import { Template } from '../template';
 import { hookableTemplate } from './templates/hookable';
 import { sortTypesAndMembers } from '../reflection/sort-types-and-members';
-import { isSkip } from '../shared/utils';
+import { isSkip, passThroughHook, toFrontmatterString } from '../shared/utils';
 import { parsedFilesToReferenceGuide } from './adapters/reference-guide';
 import { removeExcludedTags } from '../reflection/apex/remove-excluded-tags';
 import { HookError } from '../errors/errors';
@@ -129,9 +127,6 @@ function transformDocumentationBundleHook(config: MarkdownGeneratorConfig) {
 }
 
 // Configurable hooks
-function passThroughHook<T>(value: T): T {
-  return value;
-}
 
 const execTransformReferenceHook = async (
   references: DocPageReference[],
@@ -219,16 +214,3 @@ function postHookCompile(bundle: PostHookDocumentationBundle) {
     })),
   };
 }
-
-function toFrontmatterString(frontmatter: Frontmatter): string {
-  if (typeof frontmatter === 'string') {
-    return frontmatter;
-  }
-
-  if (!frontmatter) {
-    return '';
-  }
-
-  const yamlString = yaml.dump(frontmatter);
-  return `---\n${yamlString}---\n`;
-}

src/core/shared/types.d.ts

@@ -1,5 +1,4 @@
 import { Type } from '@cparra/apex-reflection';
-import { ChangeLogPageData } from '../changelog/generate-change-log';
 import { CustomObjectMetadata } from '../reflection/sobject/reflect-custom-object-sources';
 import { CustomFieldMetadata } from '../reflection/sobject/reflect-custom-field-source';
 
@@ -34,7 +33,7 @@ export type UserDefinedMarkdownConfig = {
   excludeTags: string[];
   exclude: string[];
 } & CliConfigurableMarkdownConfig &
-  Partial<ConfigurableHooks>;
+  Partial<MarkdownConfigurableHooks>;
 
 export type UserDefinedOpenApiConfig = {
   targetGenerator: 'openapi';
@@ -56,7 +55,7 @@ export type UserDefinedChangelogConfig = {
   scope: string[];
   exclude: string[];
   skipIfNoChanges: boolean;
-};
+} & Partial<ChangelogConfigurableHooks>;
 
 export type UserDefinedConfig = UserDefinedMarkdownConfig | UserDefinedOpenApiConfig | UserDefinedChangelogConfig;
 
@@ -144,6 +143,12 @@ export type DocPageData = {
 
 export type OpenApiPageData = Omit<DocPageData, 'source' | 'type'>;
 
+export type ChangeLogPageData = {
+  frontmatter: Frontmatter;
+  content: string;
+  outputDocPath: string;
+};
+
 export type PageData = DocPageData | OpenApiPageData | ReferenceGuidePageData | ChangeLogPageData;
 
 export type DocumentationBundle = {
@@ -166,9 +171,9 @@ export type PostHookDocumentationBundle = {
 // CONFIGURABLE HOOKS
 
 /**
- * The configurable hooks that can be used to modify the output of the generator.
+ * The configurable hooks that can be used to modify the output of the Markdown generator.
  */
-export type ConfigurableHooks = {
+export type MarkdownConfigurableHooks = {
   transformReferenceGuide: TransformReferenceGuide;
   transformDocs: TransformDocs;
   transformDocPage: TransformDocPage;
@@ -206,3 +211,11 @@ export type TransformDocs = (docs: DocPageData[]) => DocPageData[] | Promise<Doc
 export type TransformDocPage = (
   doc: DocPageData,
 ) => Partial<ConfigurableDocPageData> | Promise<Partial<ConfigurableDocPageData>>;
+
+export type ChangelogConfigurableHooks = {
+  transformChangeLogPage: TransformChangelogPage;
+};
+
+export type TransformChangelogPage = (
+  page: ChangeLogPageData,
+) => Partial<ChangeLogPageData> | Promise<Partial<ChangeLogPageData>>;

src/core/shared/utils.ts

@@ -1,8 +1,9 @@
-import { ExternalMetadata, Skip, SourceFileMetadata } from './types';
+import { ExternalMetadata, Frontmatter, Skip, SourceFileMetadata } from './types';
 import { Type } from '@cparra/apex-reflection';
 import { CustomObjectMetadata } from '../reflection/sobject/reflect-custom-object-sources';
 import { MarkdownGeneratorConfig } from '../markdown/generate-docs';
 import { CustomFieldMetadata } from '../reflection/sobject/reflect-custom-field-source';
+import yaml from 'js-yaml';
 
 /**
  * Represents a file to be skipped.
@@ -44,3 +45,20 @@ export function getTypeGroup(type: Type | CustomObjectMetadata, config: Markdown
       return getGroup(type, config);
   }
 }
+
+export function passThroughHook<T>(value: T): T {
+  return value;
+}
+
+export function toFrontmatterString(frontmatter: Frontmatter): string {
+  if (typeof frontmatter === 'string') {
+    return frontmatter;
+  }
+
+  if (!frontmatter) {
+    return '';
+  }
+
+  const yamlString = yaml.dump(frontmatter);
+  return `---\n${yamlString}---\n`;
+}

src/index.ts

@@ -1,10 +1,11 @@
 import type {
-  ConfigurableHooks,
+  MarkdownConfigurableHooks,
   Skip,
   UserDefinedMarkdownConfig,
   ReferenceGuidePageData,
   DocPageData,
   DocPageReference,
+  ChangeLogPageData,
   ConfigurableDocPageData,
   TransformReferenceGuide,
   TransformDocs,
@@ -13,6 +14,8 @@ import type {
   ConfigurableDocPageReference,
   UserDefinedOpenApiConfig,
   UserDefinedChangelogConfig,
+  ChangelogConfigurableHooks,
+  TransformChangelogPage,
 } from './core/shared/types';
 import { skip } from './core/shared/utils';
 import { changeLogDefaults, markdownDefaults, openApiDefaults } from './defaults';
@@ -72,12 +75,15 @@ export {
   TransformDocs,
   TransformDocPage,
   TransformReference,
-  ConfigurableHooks,
+  MarkdownConfigurableHooks,
   ReferenceGuidePageData,
   DocPageData,
+  ChangeLogPageData,
   DocPageReference,
   Skip,
   ConfigurableDocPageData,
   ConfigurableDocPageReference,
   process,
+  ChangelogConfigurableHooks,
+  TransformChangelogPage,
 };