Add 'patman' patch generation, checking and submission script

What is this?

=============

This tool is a Python script which:
- Creates patch directly from your branch
- Cleans them up by removing unwanted tags
- Inserts a cover letter with change lists
- Runs the patches through checkpatch.pl and its own checks
- Optionally emails them out to selected people

It is intended to automate patch creation and make it a less
error-prone process. It is useful for U-Boot and Linux work so far,
since it uses the checkpatch.pl script.

It is configured almost entirely by tags it finds in your commits.
This means that you can work on a number of different branches at
once, and keep the settings with each branch rather than having to
git format-patch, git send-email, etc. with the correct parameters
each time. So for example if you put:

in one of your commits, the series will be sent there.

See the README file for full details.
END

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 153 insertions, 0 deletions

diff --git a/tools/patman/patman.py b/tools/patman/patman.py
new file mode 100755
index 0000000000..cfe06d0823
--- /dev/null
+++ b/tools/patman/patman.py
@@ -0,0 +1,153 @@
+#!/usr/bin/python
+#
+# Copyright (c) 2011 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+"""See README for more information"""
+
+from optparse import OptionParser
+import os
+import re
+import sys
+import unittest
+
+# Our modules
+import checkpatch
+import command
+import gitutil
+import patchstream
+import terminal
+import test
+
+
+parser = OptionParser()
+parser.add_option('-H', '--full-help', action='store_true', dest='full_help',
+       default=False, help='Display the README file')
+parser.add_option('-c', '--count', dest='count', type='int',
+       default=-1, help='Automatically create patches from top n commits')
+parser.add_option('-i', '--ignore-errors', action='store_true',
+       dest='ignore_errors', default=False,
+       help='Send patches email even if patch errors are found')
+parser.add_option('-n', '--dry-run', action='store_true', dest='dry_run',
+       default=False, help="Do a try run (create but don't email patches)")
+parser.add_option('-s', '--start', dest='start', type='int',
+       default=0, help='Commit to start creating patches from (0 = HEAD)')
+parser.add_option('-t', '--test', action='store_true', dest='test',
+                  default=False, help='run tests')
+parser.add_option('-v', '--verbose', action='store_true', dest='verbose',
+       default=False, help='Verbose output of errors and warnings')
+parser.add_option('--cc-cmd', dest='cc_cmd', type='string', action='store',
+       default=None, help='Output cc list for patch file (used by git)')
+parser.add_option('--no-tags', action='store_false', dest='process_tags',
+                  default=True, help="Don't process subject tags as aliaes")
+
+parser.usage = """patman [options]
+
+Create patches from commits in a branch, check them and email them as
+specified by tags you place in the commits. Use -n to """
+
+(options, args) = parser.parse_args()
+
+# Run our meagre tests
+if options.test:
+    import doctest
+
+    sys.argv = [sys.argv[0]]
+    suite = unittest.TestLoader().loadTestsFromTestCase(test.TestPatch)
+    result = unittest.TestResult()
+    suite.run(result)
+
+    suite = doctest.DocTestSuite('gitutil')
+    suite.run(result)
+
+    # TODO: Surely we can just 'print' result?
+    print result
+    for test, err in result.errors:
+        print err
+    for test, err in result.failures:
+        print err
+
+# Called from git with a patch filename as argument
+# Printout a list of additional CC recipients for this patch
+elif options.cc_cmd:
+    fd = open(options.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[0]:
+            for cc in match.group(2).split(', '):
+                cc = cc.strip()
+                if cc:
+                    print cc
+    fd.close()
+
+elif options.full_help:
+    pager = os.getenv('PAGER')
+    if not pager:
+        pager = 'more'
+    fname = os.path.join(os.path.dirname(sys.argv[0]), 'README')
+    command.Run(pager, fname)
+
+# Process commits, produce patches files, check them, email them
+else:
+    gitutil.Setup()
+
+    if options.count == -1:
+        # Work out how many patches to send if we can
+        options.count = gitutil.CountCommitsToBranch() - options.start
+
+    col = terminal.Color()
+    if not options.count:
+        str = 'No commits found to process - please use -c flag'
+        print col.Color(col.RED, str)
+        sys.exit(1)
+
+    # Read the metadata from the commits
+    if options.count:
+        series = patchstream.GetMetaData(options.start, options.count)
+        cover_fname, args = gitutil.CreatePatches(options.start, options.count,
+                series)
+
+    # Fix up the patch files to our liking, and insert the cover letter
+    series = patchstream.FixPatches(series, args)
+    if series and cover_fname and series.get('cover'):
+        patchstream.InsertCoverLetter(cover_fname, series, options.count)
+
+    # Do a few checks on the series
+    series.DoChecks()
+
+    # Check the patches, and run them through 'git am' just to be sure
+    ok = checkpatch.CheckPatches(options.verbose, args)
+    if not gitutil.ApplyPatches(options.verbose, args,
+            options.count + options.start):
+        ok = False
+
+    # Email the patches out (giving the user time to check / cancel)
+    cmd = ''
+    if ok or options.ignore_errors:
+        cc_file = series.MakeCcFile(options.process_tags)
+        cmd = gitutil.EmailPatches(series, cover_fname, args,
+                options.dry_run, cc_file)
+        os.remove(cc_file)
+
+    # For a dry run, just show our actions as a sanity check
+    if options.dry_run:
+        series.ShowActions(args, cmd, options.process_tags)