Warn on npm install if Bower isn't installed.

1 files changed, 23 insertions, 0 deletions

diff --git a/build/bower-install.js b/build/bower-install.js
new file mode 100644
index 000000000..fefcfc065
--- /dev/null
+++ b/build/bower-install.js
@@ -0,0 +1,23 @@
+var installer,
+	which = require( "which" ),
+	spawn = require( "child_process" ).spawn;
+
+try {
+	which.sync( "bower" );
+} catch( error ) {
+	console.error( "Bower must be installed to build jQuery." );
+	console.error( "Please install Bower by running the following command:" );
+	console.error( "npm install -g bower" );
+	process.exit( 1 );
+}
+
+installer = spawn( "bower", [ "install" ] );
+installer.stdout.on( "data", function( data ) {
+	console.log( data );
+});
+installer.stderr.on( "data", function( data ) {
+	console.error( data );
+});
+installer.on( "close", function( code ) {
+	process.exit( code );
+});