patman: Add a 'test' subcommand

At present we use --test to indicate that tests should be run. It is
better to use a subcommand for list, like binman. Change it and adjust
the existing code to fit under a 'send' subcommand, the default.

Give this subcommand the same default arguments as the others.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/main.py b/tools/patman/main.py
index fee9bc8..77f187e 100755
--- a/tools/patman/main.py
+++ b/tools/patman/main.py
@@ -27,6 +27,16 @@
 from patman import test_util
 from patman import test_checkpatch
 
+def AddCommonArgs(parser):
+    parser.add_argument('-b', '--branch', type=str,
+        help="Branch to process (by default, the current branch)")
+    parser.add_argument('-c', '--count', dest='count', type=int,
+        default=-1, help='Automatically create patches from top n commits')
+    parser.add_argument('-e', '--end', type=int, default=0,
+        help='Commits to skip at end of patch list')
+    parser.add_argument('-s', '--start', dest='start', type=int,
+        default=0, help='Commit to start creating patches from (0 = HEAD)')
+
 epilog = '''Create patches from commits in a branch, check them and email them
 as specified by tags you place in the commits. Use -n to do a dry run first.'''
 
@@ -35,12 +45,6 @@
 send = subparsers.add_parser('send')
 send.add_argument('-H', '--full-help', action='store_true', dest='full_help',
        default=False, help='Display the README file')
-send.add_argument('-b', '--branch', type=str,
-                  help="Branch to process (by default, the current branch)")
-send.add_argument('-c', '--count', dest='count', type=int,
-       default=-1, help='Automatically create patches from top n commits')
-send.add_argument('-e', '--end', type=int, default=0,
-                  help='Commits to skip at end of patch list')
 send.add_argument('-i', '--ignore-errors', action='store_true',
        dest='ignore_errors', default=False,
        help='Send patches email even if patch errors are found')
@@ -56,8 +60,6 @@
                   "aliases [default: %(default)s]")
 send.add_argument('-r', '--in-reply-to', type=str, action='store',
                   help="Message ID that this series is in reply to")
-send.add_argument('-s', '--start', dest='start', type=int,
-       default=0, help='Commit to start creating patches from (0 = HEAD)')
 send.add_argument('-t', '--ignore-bad-tags', action='store_true',
                   default=False, help='Ignore bad tags / aliases')
 send.add_argument('-v', '--verbose', action='store_true', dest='verbose',
@@ -76,11 +78,13 @@
                   default=True, help="Don't process subject tags as aliases")
 send.add_argument('--smtp-server', type=str,
                   help="Specify the SMTP server to 'git send-email'")
-send.add_argument('--test', action='store_true', dest='test',
-                  default=False, help='run tests')
+AddCommonArgs(send)
 
 send.add_argument('patchfiles', nargs='*')
 
+test_parser = subparsers.add_parser('test', help='Run tests')
+AddCommonArgs(test_parser)
+
 # Parse options twice: first to get the project and second to handle
 # defaults properly (which depends on project).
 argv = sys.argv[1:]
@@ -95,7 +99,7 @@
     pass
 
 # Run our meagre tests
-elif args.test:
+if args.cmd == 'test':
     import doctest
     from patman import func_test
 
@@ -111,28 +115,29 @@
 
     sys.exit(test_util.ReportResult('patman', None, result))
 
-# Called from git with a patch filename as argument
-# Printout a list of additional CC recipients for this patch
-elif args.cc_cmd:
-    fd = open(args.cc_cmd, 'r')
-    re_line = re.compile('(\S*) (.*)')
-    for line in fd.readlines():
-        match = re_line.match(line)
-        if match and match.group(1) == args.patchfiles[0]:
-            for cc in match.group(2).split('\0'):
-                cc = cc.strip()
-                if cc:
-                    print(cc)
-    fd.close()
-
-elif args.full_help:
-    pager = os.getenv('PAGER')
-    if not pager:
-        pager = 'more'
-    fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
-                         'README')
-    command.Run(pager, fname)
-
 # Process commits, produce patches files, check them, email them
-else:
-    control.send(args)
+elif args.cmd == 'send':
+    # Called from git with a patch filename as argument
+    # Printout a list of additional CC recipients for this patch
+    if args.cc_cmd:
+        fd = open(args.cc_cmd, 'r')
+        re_line = re.compile('(\S*) (.*)')
+        for line in fd.readlines():
+            match = re_line.match(line)
+            if match and match.group(1) == args.patchfiles[0]:
+                for cc in match.group(2).split('\0'):
+                    cc = cc.strip()
+                    if cc:
+                        print(cc)
+        fd.close()
+
+    elif args.full_help:
+        pager = os.getenv('PAGER')
+        if not pager:
+            pager = 'more'
+        fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
+                             'README')
+        command.Run(pager, fname)
+
+    else:
+        control.send(args)
diff --git a/tools/patman/test_util.py b/tools/patman/test_util.py
index 0827488..a87d3cc 100644
--- a/tools/patman/test_util.py
+++ b/tools/patman/test_util.py
@@ -47,7 +47,7 @@
         glob_list = []
     glob_list += exclude_list
     glob_list += ['*libfdt.py', '*site-packages*', '*dist-packages*']
-    test_cmd = 'test' if 'binman' in prog else '-t'
+    test_cmd = 'test' if 'binman' in prog or 'patman' in prog else '-t'
     prefix = ''
     if build_dir:
         prefix = 'PYTHONPATH=$PYTHONPATH:%s/sandbox_spl/tools ' % build_dir