Depth-first cleaning of empty directories/subdirectories

[frickenate]

Is it in any way possible to force a depth-first search? This is especially useful/needed when combined with a filter function.

I have a directory with empty descendents:

build/
    first-empty-dir/
        second-empty-dir/
            third-empty-dir/

and need to delete all empty directories within build/ (not all directories are empty, so I can't just clean the entire build directory).

My best attempt thus far looks like this:

var fs = require('fs');

grunt.config('clean', {
    empty: {
        src: ['build/**/*', 'build/*'],
        filter: function (path) {
            return grunt.file.isDir(path) && fs.readdirSync(path).length === 0;
        }
    }
});

grunt.task.run('clean');

But clearly a breadth-first search is performed which first finds first-empty-directory which is not yet empty. If there isn't a native way with grunt's glob functionality, is there a clean way to define or run a grunt task that executes iteratively until some condition is met (ie: no paths were deleted in the most recent execution)? Otherwise I fear having to write a custom task to perform a depth-first search.

[richardsimko]

+1 on this!

[panther7]

+1 ;-)

[Aelexe]

A bit late to the party, but +1

[HardeepAsrani]

Almost a year later than the last request +1