Merge files only if they go deeper than two levels - gulp

Question

I have this file structure:
Root
Folder1
Subfolder1.1
Subfolder1.1.1
file_1.1.1.1.js
file_1.1.1.2.js
file_1.1.1.js
file_1.1.2.js
Subfolder1.2
Folder2
Folder3
I'm trying to accomplish the following gulp task that will take the root directory, in this case, the Root folder, and generate the following structure:
Root
Folder1
Subfolder1.1
Subfolder1.1.1.min.js
file_1.1.1.min.js
file_1.1.2.min.js
Subfolder1.2
Folder2
Folder3
As you can see, the files that are directly in the second level, e.g. Subfolder1.1, are just minified. All the files that go deeper than two levels will be concatenated and named after the second level folder containing them.
Is this possible to accomplish in gulp, and if it is, can anybody give me a clue on how to do it?

Answer 1

Maybe this can help you to run some tasks by folder.
Or maybe you can find some help on building such a thing yourself by iterating over directories.

Answer 2

Okay, I was able to do it, here is the code:
gulp.task('task',
function() {
// The input root dir
var root = 'root_in';
// The output root dir
var rootOut = 'root_out'
// first get all the folders in the in the root directory
var folders = fs.readdirSync(root)
.filter(function(file) {
return fs.statSync(path.join(root, file)).isDirectory();
});
return folders.map(function(folder) {
// get the files inside each folder
var files = fs.readdirSync(path.join(root, folder));
files.map(function(file) {
// in case it is a directory, concat all the files
if (fs.statSync(path.join(root, folder, file)).isDirectory()) {
return gulp.src(path.join(root, folder, file, '/**/*.js'))
.pipe(uglify())
.pipe(gulp_concat(file + '.js'))
.pipe(gulp.dest(path.join(root, folder)))
}
// if it is a regular file, just uglify it and output
else {
return gulp.src(path.join(root, folder, file))
.pipe(uglify())
.pipe(gulp.dest(path.join(rootOut, folder)));
}
});
});
});