sb: Add git clean to the supported git commands.

source-builder/sb/download.py

@@ -515,6 +515,15 @@ def _git_downloader(url, local, config, opts):
             log.notice('git: reset: %s' % (us[0]))
             if _do_download(opts):
                 repo.reset(arg)
+                repo.submodule_foreach(['reset'] + arg)
+        elif _as[0] == 'clean':
+            arg = []
+            if len(_as) > 1:
+                arg = ['--%s' % (_as[1])]
+            log.notice('git: clean: %s' % (us[0]))
+            if _do_download(opts):
+                repo.clean(arg)
+                repo.submodule_foreach(['clean'] + arg)
         elif _as[0] == 'protocol':
             pass
         else:

source-builder/sb/git.py

@@ -105,6 +105,14 @@ class repo:
     def submodule(self, module):
         ec, output = self._run(['submodule', 'update', '--init', module], check = True)
 
+    def submodule_foreach(self, args = []):
+        if type(args) == str:
+            args = [args.split(args)]
+        ec, output = self._run(['submodule',
+                                'foreach',
+                                '--recursive',
+                                self.git] + args, check = True)
+
     def submodules(self):
         smodules = {}
         ec, output = self._run(['submodule'], check = True)