update regex to support repository shorthand (#561)

Author: abhijit-hota

src/package.ts

@@ -582,15 +582,15 @@ export class MarkdownProcessor extends BaseProcessor {
 			return null;
 		}
 
-		const regex = /github\.com\/([^/]+)\/([^/]+)(\/|$)/;
+		const regex = /github(\.com\/|:)([^/]+)\/([^/]+)(\/|$)/;
 		const match = regex.exec(repository);
 
 		if (!match) {
 			return null;
 		}
 
-		const account = match[1];
-		const repositoryName = match[2].replace(/\.git$/i, '');
+		const account = match[2];
+		const repositoryName = match[3].replace(/\.git$/i, '');
 		const branchName = githubBranch ? githubBranch : 'HEAD';
 
 		return {

src/test/package.test.ts

@@ -1930,6 +1930,33 @@ describe('MarkdownProcessor', () => {
 			});
 	});
 
+	it('should infer baseContentUrl if its a github repo (short format)', () => {
+		const manifest = {
+			name: 'test',
+			publisher: 'mocha',
+			version: '0.0.1',
+			description: 'test extension',
+			engines: Object.create(null),
+			repository: 'github:username/repository',
+		};
+
+		const root = fixture('readme');
+		const processor = new ReadmeProcessor(manifest, {});
+		const readme = {
+			path: 'extension/readme.md',
+			localPath: path.join(root, 'readme.md'),
+		};
+
+		return processor
+			.onFile(readme)
+			.then(file => read(file))
+			.then(actual => {
+				return readFile(path.join(root, 'readme.default.md'), 'utf8').then(expected => {
+					assert.equal(actual, expected);
+				});
+			});
+	});
+
 	it('should replace img urls with baseImagesUrl', () => {
 		const manifest = {
 			name: 'test',