Add regex support for subcommand forall

Filter the project list based on regex or wildcard matching
of strings, then we can handle subset of all projects.

Change-Id: Ib6c23aec79e7d981f7b6a5eb0ae93c44effec467
Signed-off-by: Zhiguang Li <muzili@gmail.com>

command.py

@@ -186,6 +186,17 @@ class Command(object):
     result.sort(key=_getpath)
     return result
 
+  def FindProjects(self, args):
+    result = []
+    for project in self.GetProjects(''):
+      for arg in args:
+        pattern = re.compile(r'%s' % arg, re.IGNORECASE)
+        if pattern.search(project.name) or pattern.search(project.relpath):
+          result.append(project)
+          break
+    result.sort(key=lambda project: project.relpath)
+    return result
+
 # pylint: disable=W0223
 # Pylint warns that the `InteractiveCommand` and `PagedCommand` classes do not
 # override method `Execute` which is abstract in `Command`.  Since that method

subcmds/forall.py

@@ -42,10 +42,14 @@ class Forall(Command, MirrorSafeCommand):
   helpSummary = "Run a shell command in each project"
   helpUsage = """
 %prog [<project>...] -c <command> [<arg>...]
+%prog -r str1 [str2] ... -c <command> [<arg>...]"
 """
   helpDescription = """
 Executes the same shell command in each project.
 
+The -r option allows running the command only on projects matching
+regex or wildcard expression.
+
 Output Formatting
 -----------------
 
@@ -103,6 +107,9 @@ without iterating through the remaining projects.
       setattr(parser.values, option.dest, list(parser.rargs))
       while parser.rargs:
         del parser.rargs[0]
+    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('-c', '--command',
                  help='Command (and arguments) to execute',
                  dest='command',
@@ -166,7 +173,12 @@ without iterating through the remaining projects.
     rc = 0
     first = True
 
-    for project in self.GetProjects(args):
+    if not opt.regex:
+      projects = self.GetProjects(args)
+    else:
+      projects = self.FindProjects(args)
+
+    for project in projects:
       env = os.environ.copy()
       def setenv(name, val):
         if val is None:

subcmds/list.py

@@ -14,7 +14,6 @@
 # limitations under the License.
 
 from __future__ import print_function
-import re
 import sys
 
 from command import Command, MirrorSafeCommand
@@ -83,14 +82,3 @@ This is similar to running: repo forall -c 'echo "$REPO_PATH : $REPO_PROJECT"'.
 
     lines.sort()
     print('\n'.join(lines))
-
-  def FindProjects(self, args):
-    result = []
-    for project in self.GetProjects(''):
-      for arg in args:
-        pattern = re.compile(r'%s' % arg, re.IGNORECASE)
-        if pattern.search(project.name) or pattern.search(project.relpath):
-          result.append(project)
-          break
-    result.sort(key=lambda project: project.relpath)
-    return result