How to use basic regular expressions within gulp.src?

Question

I'm trying to select two files with gulp.src: highcharts.js and highcharts.src.js.

Of course I know I could add explicitly these two with an array expression, but for learning purposes I'm trying to write a single expression for them.

I've read that one can use simple regular expression syntax but it's not clear how.

I tried

gulp.src("highcharts(\.src)?\.js")

but it didn't match any files.

Answer 1

Gulp uses glob which doesn't support the regular expressions you're normally used to. It uses special globbing patterns that are optimized to matching files.

Your example could be written as:

gulp.src('highcharts?(.src).js')

Check out the glob primer for more examples of what's possible with glob.