Add --inverse-regex option to forall subcommand

Make it possible to exclude projects using regex/wildcard.

The syntax is similar to that of the -r option, e.g.:

  repo forall -i ^platform/ ^device/ -c 'echo $REPO_PROJECT'

Change-Id: Id250de5665152228c044c79337d3ac15b5696484

command.py

@@ -193,14 +193,20 @@ class Command(object):
     result.sort(key=_getpath)
     return result
 
-  def FindProjects(self, args):
+  def FindProjects(self, args, inverse=False):
     result = []
     patterns = [re.compile(r'%s' % a, re.IGNORECASE) for a in args]
     for project in self.GetProjects(''):
       for pattern in patterns:
-        if pattern.search(project.name) or pattern.search(project.relpath):
+        match = pattern.search(project.name) or pattern.search(project.relpath)
+        if not inverse and match:
           result.append(project)
           break
+        if inverse and match:
+          break
+      else:
+        if inverse:
+          result.append(project)
     result.sort(key=lambda project: project.relpath)
     return result
 

subcmds/forall.py

@@ -120,6 +120,9 @@ without iterating through the remaining projects.
     p.add_option('-r', '--regex',
                  dest='regex', action='store_true',
                  help="Execute the command only on projects matching regex or wildcard expression")
+    p.add_option('-i', '--inverse-regex',
+                 dest='inverse_regex', action='store_true',
+                 help="Execute the command only on projects not matching regex or wildcard expression")
     p.add_option('-g', '--groups',
                  dest='groups',
                  help="Execute the command only on projects matching the specified groups")
@@ -215,10 +218,12 @@ without iterating through the remaining projects.
     if os.path.isfile(smart_sync_manifest_path):
       self.manifest.Override(smart_sync_manifest_path)
 
-    if not opt.regex:
-      projects = self.GetProjects(args, groups=opt.groups)
-    else:
+    if opt.regex:
       projects = self.FindProjects(args)
+    elif opt.inverse_regex:
+      projects = self.FindProjects(args, inverse=True)
+    else:
+      projects = self.GetProjects(args, groups=opt.groups)
 
     os.environ['REPO_COUNT'] = str(len(projects))