Bug 937594 - Create a mach clobber command for B2G, r=jgriffin

tools/mach_b2g_bootstrap.py

@@ -53,7 +53,7 @@
 
 # Individual files providing mach commands.
 MACH_MODULES = [
-    'python/mach/mach/commands/commandinfo.py',
+    'tools/mach_commands.py',
 ]
 
 CATEGORIES = {

tools/mach_commands.py

@@ -0,0 +1,35 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import print_function, unicode_literals
+
+import mozfile
+import os
+
+from mach.decorators import (
+    CommandProvider,
+    Command,
+)
+from mozbuild.base import (
+    MachCommandBase,
+    MachCommandConditions as conditions
+)
+
+@CommandProvider
+class Build(MachCommandBase):
+    """Interface for build related commands."""
+
+    def __init__(self, context):
+        MachCommandBase.__init__(self, context)
+        self.b2g_home = context.b2g_home
+
+    @Command('clobber', category='build',
+        conditions=[conditions.is_b2g],
+        description='Clobber the tree (delete the objdir and out directory).')
+    def clobber(self):
+        self.remove_objdir()
+        outdir = os.path.join(self.b2g_home, 'out')
+        if os.path.isdir(outdir):
+            mozfile.rmtree(outdir)
+        return 0