Builds downloaded with grunt-modernizr don't include a version number as this project expects it.

1) It seems this does prevent the module from using the library at all which is frustrating.

Yes, I'd already reached the same conclusion about manually adding the version number for the time being. That seems to do the trick for now while we figure out a better fix.

I'm also attempting to tackle this from the other end:

https://github.com/Modernizr/grunt-modernizr/issues/75

Either way, I still think that the Modernizr module should not fail to load the entire lib just because of a missing version number.

Using r="([\d\.]*)" on my attached custom build seems to get me part of the way there but my RegX & PHP just aren't good enough to give you a patch worth submitting.

Right-O. Will give the patch a whirl and report back...

Oops, didn't mean to delete the patch.

Yes, the reporting error is fixed with the patch in #3 but the library still fails to load if the version number isn't in the comment at the top of the custom build.

The following pattern is probably a little more robust for singling out the version number from the code (assuming that the variable name "r" is consistent):

var r="([\d\.]*)"

In my attached custom build this will return var r="2.7.1" - we'd then just need to create a sub string and strip off the surrounding cruft.

Could we attempt to grab the version number from the commented code first (as the module currently does) but then if it fails, try to get the version number from the JavaScript (along the lines of the RegX I've quoted above)? Then if both attempts fail, print "Version unknown" in the Status report and don't load the library. Thoughts?

Didn't mean to change status. We keep posting at the same time!

I've just chanced upon grunt-text-replace and now have a basic grunt task for getting around this version number business in the short term.

Once you have grunt-text-replace installed, add the following task to your Gruntfile.js (make sure it's run after grunt-modernizr):

replace: {
      modernizr_build_version_no: {
        src: ['../../libraries/modernizr/modernizr.custom.js'],
        overwrite: true, // overwrite matched source files
        replacements: [{
          from: 'Modernizr (Custom Build)',
          to: 'Modernizr 6.6.6 (Custom Build)'
        }]
      }
    }

That does a rather slap dash job of adding in a totally made up version number to the modernizr build created by grunt-modernizr just to keep this module happy in the meantime. Obviously you'll want to tweak the path to your modernizr build to match your setup.

Excellent news - glad I could help :)