add theme tag automatically

related to #83

src/package.ts

@@ -124,15 +124,24 @@ export class TagsProcessor extends BaseProcessor {
 		const keywords = this.manifest.keywords || [];
 		const trimmedKeywords = keywords.slice(0, 5);
 
-		let promise = Promise.resolve(null);
+		let promise = Promise.resolve(trimmedKeywords);
 
 		if (keywords.length > 5) {
 			console.warn(`The keyword list is limited to 5 keywords; only the following keywords will be in your extension: [${ trimmedKeywords.join(', ') }].`);
 			promise = util.read('Do you want to continue? [y/N] ')
-				.then(answer => /^y$/i.test(answer) ? Promise.resolve(null) : Promise.reject('Aborted'));
+				.then(answer => /^y$/i.test(answer) ? Promise.resolve(trimmedKeywords) : Promise.reject('Aborted'));
 		}
 
-		return promise.then<any>(() => this.vsix.tags = trimmedKeywords.join(','));
+		return promise.then<any>(keywords => {
+			const contributes = this.manifest.contributes;
+			const themes = contributes && contributes['themes'];
+
+			if (themes && themes.length > 0) {
+				keywords = [...keywords, 'theme'];
+			}
+
+			this.vsix.tags = _.unique(keywords).join(',');
+		});
 	}
 }
 

src/test/package.test.ts

@@ -427,6 +427,52 @@ describe('toVsixManifest', () => {
 				assert.deepEqual(result.PackageManifest.Metadata[0].GalleryFlags, ['Public Preview']);
 			});
 	});
+
+	it('should automatically add theme tag', () => {
+		const manifest = {
+			name: 'test',
+			publisher: 'mocha',
+			version: '0.0.1',
+			engines: Object.create(null),
+			contributes: {
+				themes: [{ label: 'monokai', uiTheme: 'vs', path: 'monokai.tmTheme' }]
+			}
+		};
+
+		return _toVsixManifest(manifest, [])
+			.then(parseXml)
+			.then(result => assert.deepEqual(result.PackageManifest.Metadata[0].Tags, ['theme']));
+	});
+
+	it('should not automatically add theme tag when themes are empty', () => {
+		const manifest = {
+			name: 'test',
+			publisher: 'mocha',
+			version: '0.0.1',
+			engines: Object.create(null),
+			contributes: {
+				themes: []
+			}
+		};
+
+		return _toVsixManifest(manifest, [])
+			.then(parseXml)
+			.then(result => assert.deepEqual(result.PackageManifest.Metadata[0].Tags, ['']));
+	});
+
+	it('should remove duplicate tags', () => {
+		const manifest = {
+			name: 'test',
+			publisher: 'mocha',
+			version: '0.0.1',
+			engines: Object.create(null),
+			keywords: ['theme', 'theme']
+		};
+
+		return _toVsixManifest(manifest, [])
+			.then(parseXml)
+			.then(result => assert.deepEqual(result.PackageManifest.Metadata[0].Tags, ['theme']));
+	});
 });
 
 describe('toContentTypes', () => {