Support installation of plugins packaged as vsix

Summary: This is experimental feature to prove that vsix format can be used to publish plugins. Turns out there are almost no differences of vsix in comparison with npm packages.

Reviewed By: jknoxville

Differential Revision: D19770476

fbshipit-source-id: b3c62e7f2a4e8000113b9f1651e8657eb3e0d6fa

src/utils/pluginManager.tsx

@@ -17,6 +17,7 @@ import NpmApi, {Package} from 'npm-api';
 import semver from 'semver';
 import decompress from 'decompress';
 import decompressTargz from 'decompress-targz';
+import decompressUnzip from 'decompress-unzip';
 import tmp from 'tmp';
 
 const ALGOLIA_APPLICATION_ID = 'OFCNCOG2CU';
@@ -68,27 +69,42 @@ export async function installPluginFromFile(packagePath: string) {
   const tmpDir = tmp.dirSync().name;
   try {
     const files = await decompress(packagePath, tmpDir, {
-      plugins: [decompressTargz()],
+      plugins: [decompressTargz(), decompressUnzip()],
     });
     if (!files.length) {
       throw new Error('The package is not in tar.gz format or is empty');
     }
+
+    // npm packages are tar.gz archives containing folder 'package' inside
     const packageDir = path.join(tmpDir, 'package');
-    if (!(await fs.pathExists(packageDir))) {
+    const isNpmPackage = await fs.pathExists(packageDir);
+
+    // vsix packages are zip archives containing folder 'extension' inside
+    const extensionDir = path.join(tmpDir, 'extension');
+    const isVsix = await fs.pathExists(extensionDir);
+
+    if (!isNpmPackage && !isVsix) {
       throw new Error(
-        'Package format is invalid: directory "package" not found',
+        'Package format is invalid: directory "package" or "extensions" not found in the archive root',
       );
     }
-    const packageJsonPath = path.join(packageDir, 'package.json');
+
+    const packageRoot = isNpmPackage ? packageDir : extensionDir;
+
+    // otherwise both npm and vsix are quite similar, so we can use the same logic for installing them
+    const packageJsonPath = path.join(packageRoot, 'package.json');
     if (!(await fs.pathExists(packageJsonPath))) {
       throw new Error(
-        'Package format is invalid: file "package/package.json" not found',
+        `Package format is invalid: file "${path.relative(
+          tmpDir,
+          packageJsonPath,
+        )}" not found`,
       );
     }
     const packageJson = await fs.readJSON(packageJsonPath);
     const name = packageJson.name as string;
     await installPlugin(name, pluginManager =>
-      pluginManager.installFromPath(packageDir).then(() => {}),
+      pluginManager.installFromPath(packageRoot).then(() => {}),
     );
   } finally {
     if (fs.existsSync(tmpDir)) {