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.

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.

• javascript
• regex
• gulp
• glob

• 2 Try gulp.src("highcharts.{src.js,js}") – Wiktor Stribiżew Commented Mar 30, 2016 at 9:52
• 1 @WiktorStribiżew thank you that actually works, even the simplified (but uglier) gulp.src("highcharts{.src,}.js") but I still wonder then how we can use actual regular expression syntax. Or maybe we can't, and I misunderstood something? – Zoltán Tamási Commented Mar 30, 2016 at 10:00
• 1 gulp.src only support glob, or write custom function with glob + regex and pass list of files to gulp.src – YOU Commented Mar 30, 2016 at 10:13

1 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.