function setup() {
	var build = null,
		errors = '',
		rootdir = path.resolve( __dirname, '..', '..' );

	function spawnMake() {
		debug( 'spawning %o', 'npm run build-css' );
		build = spawn( 'npm', [ 'run', 'build-css' ], {
			shell: true,
			cwd: rootdir,
			stdio: [ 'ignore', 'pipe', 'pipe' ],
		} );
		errors = '';
		build.once( 'exit', onexit );
		build.stdout.setEncoding( 'utf8' );
		build.stdout.on( 'data', onstdout );
		build.stderr.on( 'data', onstderr );
	}

	function onstdout( d ) {
		debug( 'stdout %o', d.trim() );
	}

	function onexit() {
		build.stderr.removeListener( 'data', onstderr );
		build.stdout.removeListener( 'data', onstdout );
		build = null;
	}

	function onstderr( stderr ) {
		process.stderr.write( stderr.toString( 'utf8' ) );
		errors += stderr.toString( 'utf8' );
	}

	return function( req, res, next ) {
		if ( ! build ) {
			spawnMake();
		}

		build.once( 'exit', function( code ) {
			if ( 0 === code ) {
				// `make` success
				next();
			} else {
				// `make` failed
				res.send( '<pre>`npm run build-css` failed \n\n' + errors + '</pre>' );
			}
		} );
	};
}
function setup() {
	var build = null,
		errors = '',
		rootdir = path.resolve( __dirname, '..', '..' );

	function spawnMake() {
		debug( 'spawning %o', 'npm run build-css' );
		build = spawn( 'npm', [ 'run', 'build-css' ], {
			shell: true,
			cwd: rootdir,
			stdio: [ 'ignore', 'pipe', 'pipe' ],
		} );
		errors = '';
		build.once( 'exit', onexit );
		build.stdout.setEncoding( 'utf8' );
		build.stdout.on( 'data', onstdout );
		build.stderr.on( 'data', onstderr );
	}

	function onstdout( d ) {
		debug( 'stdout %o', d.trim() );
	}

	function onexit() {
		build.stderr.removeListener( 'data', onstderr );
		build.stdout.removeListener( 'data', onstdout );
		build = null;
	}

	function onstderr( stderr ) {
		process.stderr.write( stderr.toString( 'utf8' ) );
		errors += stderr.toString( 'utf8' );
	}

	return function( req, res, next ) {
		if ( ! build ) {
			spawnMake();
		}

		build.once( 'exit', function( code ) {
			if ( 0 === code ) {
				
				next();
			} else {
				
				res.send( '<pre>`npm run build-css` failed \n\n' + errors + '</pre>' );
			}
		} );
	};
}
function setup ( ) { var build = null , errors = '' , rootdir = path . resolve ( __dirname , '..' , '..' ) ; function spawnMake ( ) { debug ( 'spawning %o' , 'npm run build-css' ) ; build = spawn ( 'npm' , [ 'run' , 'build-css' ] , { shell : true , cwd : rootdir , stdio : [ 'ignore' , 'pipe' , 'pipe' ] , } ) ; errors = '' ; build . once ( 'exit' , onexit ) ; build . stdout . setEncoding ( 'utf8' ) ; build . stdout . on ( 'data' , onstdout ) ; build . stderr . on ( 'data' , onstderr ) ; } function onstdout ( d ) { debug ( 'stdout %o' , d . trim ( ) ) ; } function onexit ( ) { build . stderr . removeListener ( 'data' , onstderr ) ; build . stdout . removeListener ( 'data' , onstdout ) ; build = null ; } function onstderr ( stderr ) { process . stderr . write ( stderr . toString ( 'utf8' ) ) ; errors += stderr . toString ( 'utf8' ) ; } return function ( req , res , next ) { if ( ! build ) { spawnMake ( ) ; } build . once ( 'exit' , function ( code ) { if ( 0 === code ) { // `make` success next ( ) ; } else { // `make` failed res . send ( '<pre>`npm run build-css` failed \n\n' + errors + '</pre>' ) ; } } ) ; } ; }
Returns a "build middleware", which runs `npm run build-css` upon each HTTP
request. Meant for use in "development" env.

@return {Function} build middleware function
@public
Returns a build middleware which runs npm run build - css upon each HTTP request . Meant for use in development env .