javascript - Install all JSPM dependencies in gulp task -

i want have 1 command download dependencies project need. should gulp dependencies. have jspm dependencies in fronted , can install them typing jspm install in command line. want automate gulp (it take care other dependencies, too, pip, composer etc).

here have tried:

gulp.task('dependencies', ['deps-composer', 'deps-jspm', 'deps-pip']);  // others  gulp.task('deps-jspm', function (done) {   require('jspm').install().then(done); }); 

however, creates empty jspm_packages directory , not download anything.

i have succeeded following

gulp.task('deps-jspm', function (done) {   require('child_process').execsync('jspm install'); }); 

but looks overkill , requires jspm installed globally.

the directory structure normal, i.e. there package.json, config.js , gulpfile.js in root directory.

jspm.install() expects package name first argument in order install specific package. if want install all packages have pass true (see the docs):

gulp.task('deps-jspm', function (done) {   require('jspm').install(true).then(done); });