fix: handle multiple export modules in readme updater

Author: achingbrain

src/docs/readme-updater-plugin.js

@@ -22,11 +22,6 @@ export function load (app) {
   // pages of the current module or monorepo packages
   app.renderer.on(td.RendererEvent.END, (/** @type {td.RendererEvent} */ evt) => {
     const urlMappings = evt.urls?.filter(urlMapping => {
-      // skip anything without a model-level comment
-      if (urlMapping.model?.comment == null) {
-        return false
-      }
-
       // single-module repo, single export
       if (urlMapping.url === 'modules.html') {
         return true
@@ -44,10 +39,6 @@ export function load (app) {
 
       return false
     }).map(urlMapping => {
-      if (urlMapping.model?.comment == null) {
-        throw new Error('Model comment was null')
-      }
-
       if (isMonorepoParent) {
         let project = urlMapping.model.name
 
@@ -59,21 +50,48 @@ export function load (app) {
           throw new Error(`Could not derive project name from url mapping model "${urlMapping.model.name}" with parent "${urlMapping.model.parent?.name}"`)
         }
 
+        let comment = urlMapping.model?.comment
+
+        if (comment == null && urlMapping.model instanceof td.DeclarationReflection && urlMapping.model.children != null && urlMapping.model.children.length > 0) {
+          // multi-export modules have a different structure
+          comment = urlMapping.model.children
+            .find(child => child.name === 'index')
+            ?.comment
+        }
+
+        if (comment == null) {
+          return null
+        }
+
         return {
-          comment: urlMapping.model.comment,
+          comment,
           manifestPath: path.join(projects[project].dir, 'package.json'),
           readmePath: path.join(projects[project].dir, 'README.md')
         }
       }
 
+      if (urlMapping.model?.comment == null) {
+        return null
+      }
+
       return {
         comment: urlMapping.model.comment,
         manifestPath: path.join(process.cwd(), 'package.json'),
         readmePath: path.join(process.cwd(), 'README.md')
       }
     })
 
-    urlMappings?.forEach(urlMapping => updateModule(urlMapping.comment, urlMapping.manifestPath, urlMapping.readmePath, app))
+    if (urlMappings == null) {
+      return
+    }
+
+    for (const urlMapping of urlMappings) {
+      if (urlMapping == null) {
+        continue
+      }
+
+      updateModule(urlMapping.comment, urlMapping.manifestPath, urlMapping.readmePath, app)
+    }
   })
 }