cc @doctyper – as the original author, is there any reason why we need to use .spawn()?

Wait, child_process.spawn is not compatible on Windows?

@doctyper yes, it triggers ENOENT error. Some discussion is here.

What about this issue?

According to the docs, child_process.exec does not take an stdio option. The exec call returns a buffer rather than a stream. This means that executing this command via exec will not pipe the output to the current process. You'll only be able to see the stdout output after the command is finished. This would break the feedback flow in tools like grunt-modernizr.

Also, it appears exec has a maximum buffer setting. It may be overridden, but the buffer size in this case varies, so it's probably not the method to use in this case.

Yes, you are right with it. I just thought that one really important thing is a callback calling after child is exit - looks like build variable, that is typed as Stream is not returned to anybody.

Anyway - any ideas how can I run this in Windows env?

Thanks.

Guys? =)

It is still breaks on Windows...

Ping @doctyper

Unfortunately, I don't know the best way to get this working in Windows. I'm not quite sure it's even on the road map.

I can tell you that at some point, we will switch build systems entirely and will move away from Grunt lock-in (see #1184). Once that lands, this issue will no longer exist.

Using Patrick's commit from above (patrickkettner@c99e4c1), I was able to make gulp-modernizr work on Windows.

@doctyper Is it true that «This would break the feedback flow in tools like grunt-modernizr» does not apply to gulp-modernizr or was I just lucky?

"This would break the feedback flow in tools like grunt-modernizr"

@doctyper can correct me if I am wrong, but I took that to mean that it just makes it seem like grunt-modernizr isn't doing anything (since exec only outputs when completed). So on a slower machine, with a larger build, it would seem that it is just hanging for a long time. Therefore, spawn is preffered

big ups to @sindresorhus for pointing out win-spawn