update to support google cloud functions

Author: debanjanbasu

lib/packExternalModules.js

@@ -291,20 +291,23 @@ module.exports = {
         addModulesToPackageJson(prodModules, modulePackage);
         this.serverless.utils.writeFileSync(modulePackageJson, JSON.stringify(modulePackage, null, 2));
 
-        // Copy modules
-        // const startCopy = _.now();
-        // return BbPromise.fromCallback(callback => fse.copy(path.join(compositeModulePath, 'node_modules'), path.join(modulePath, 'node_modules'), callback))
-        // .tap(() => this.options.verbose && this.serverless.cli.log(`Copy modules: ${modulePath} [${_.now() - startCopy} ms]`))
-        // .then(() => {
-        //   // Prune extraneous packages - removes not needed ones
-        //   const startPrune = _.now();
-        //   return BbPromise.fromCallback(callback => {
-        //     childProcess.exec('npm prune', {
-        //       cwd: modulePath
-        //     }, callback);
-        //   })
-        //   .tap(() => this.options.verbose && this.serverless.cli.log(`Prune: ${modulePath} [${_.now() - startPrune} ms]`));
-        // });
+        // Copy modules only if not google-cloud-functions
+        // GCF Auto installs the package json
+        if (_.get(this.serverless, 'service.provider.name') !== 'google') {
+          const startCopy = _.now();
+          return BbPromise.fromCallback(callback => fse.copy(path.join(compositeModulePath, 'node_modules'), path.join(modulePath, 'node_modules'), callback))
+          .tap(() => this.options.verbose && this.serverless.cli.log(`Copy modules: ${modulePath} [${_.now() - startCopy} ms]`))
+          .then(() => {
+            // Prune extraneous packages - removes not needed ones
+            const startPrune = _.now();
+            return BbPromise.fromCallback(callback => {
+              childProcess.exec('npm prune', {
+                cwd: modulePath
+              }, callback);
+            })
+            .tap(() => this.options.verbose && this.serverless.cli.log(`Prune: ${modulePath} [${_.now() - startPrune} ms]`));
+          });
+        }
       })
       .return();
     });