understand categories. fixes #23

resources/extension.vsixmanifest

@@ -5,6 +5,7 @@
     <DisplayName>${ displayName }</DisplayName>
     <Description xml:space="preserve">${ description }</Description>
     <Tags>${ tags }</Tags>
+    <Categories>${ categories }</Categories>
     <GalleryFlags>Public</GalleryFlags>
     <Properties>
       <% if (links.repository) { %>

src/manifest.ts

@@ -25,6 +25,7 @@ export interface Manifest {
 	displayName?: string;
 	description?: string;
 	keywords?: string[];
+	categories?: string[];
 	homepage?: string;
 	bugs?: string | { url?: string; email?: string };
 	license?: string;

src/package.ts

@@ -93,6 +93,7 @@ class MainProcessor extends BaseProcessor {
 			publisher: manifest.publisher,
 			description: manifest.description || '',
 			tags: (manifest.keywords || []).concat('vscode').join(','),
+			categories: (manifest.categories || []).join(','),
 			links: {
 				repository: getUrl(manifest.repository),
 				bugs: getUrl(manifest.bugs),

src/test/package.test.ts

@@ -298,6 +298,24 @@ describe('toVsixManifest', () => {
 				assert.ok(properties.some(p => p.Id === 'Microsoft.VisualStudio.Services.Links.Learn' && p.Value === 'https://github.com/Microsoft/vscode-spell-check'));
 			});
 	});
+	
+	it('should understand categories', () => {
+		const manifest = {
+			name: 'test',
+			publisher: 'mocha',
+			version: '0.0.1',
+			engines: Object.create(null),
+			categories: ['hello', 'world']
+		};
+
+		return toVsixManifest(manifest, [])
+			.then(xml => parseXml(xml))
+			.then(result => {
+				const categories = result.PackageManifest.Metadata[0].Categories[0].split(',');
+				assert.ok(categories.some(c => c === 'hello'));
+				assert.ok(categories.some(c => c === 'world'));
+			});
+	});
 });
 
 describe('toContentTypes', () => {