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, 238 insertions, 0 deletions

diff --git a/tools/patman/series.py b/tools/patman/series.py
new file mode 100644
index 0000000000..05d9e73a46
--- /dev/null
+++ b/tools/patman/series.py
@@ -0,0 +1,238 @@
+# 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
+#
+
+import os
+
+import gitutil
+import terminal
+
+# Series-xxx tags that we understand
+valid_series = ['to', 'cc', 'version', 'changes', 'prefix', 'notes'];
+
+class Series(dict):
+    """Holds information about a patch series, including all tags.
+
+    Vars:
+        cc: List of aliases/emails to Cc all patches to
+        commits: List of Commit objects, one for each patch
+        cover: List of lines in the cover letter
+        notes: List of lines in the notes
+        changes: (dict) List of changes for each version, The key is
+            the integer version number
+    """
+    def __init__(self):
+        self.cc = []
+        self.to = []
+        self.commits = []
+        self.cover = None
+        self.notes = []
+        self.changes = {}
+
+    # These make us more like a dictionary
+    def __setattr__(self, name, value):
+        self[name] = value
+
+    def __getattr__(self, name):
+        return self[name]
+
+    def AddTag(self, commit, line, name, value):
+        """Add a new Series-xxx tag along with its value.
+
+        Args:
+            line: Source line containing tag (useful for debug/error messages)
+            name: Tag name (part after 'Series-')
+            value: Tag value (part after 'Series-xxx: ')
+        """
+        # If we already have it, then add to our list
+        if name in self:
+            values = value.split(',')
+            values = [str.strip() for str in values]
+            if type(self[name]) != type([]):
+                raise ValueError("In %s: line '%s': Cannot add another value "
+                        "'%s' to series '%s'" %
+                            (commit.hash, line, values, self[name]))
+            self[name] += values
+
+        # Otherwise just set the value
+        elif name in valid_series:
+            self[name] = value
+        else:
+            raise ValueError("In %s: line '%s': Unknown 'Series-%s': valid "
+                        "options are %s" % (self.commit.hash, line, name,
+                            ', '.join(valid_series)))
+
+    def AddCommit(self, commit):
+        """Add a commit into our list of commits
+
+        We create a list of tags in the commit subject also.
+
+        Args:
+            commit: Commit object to add
+        """
+        commit.CheckTags()
+        self.commits.append(commit)
+
+    def ShowActions(self, args, cmd, process_tags):
+        """Show what actions we will/would perform
+
+        Args:
+            args: List of patch files we created
+            cmd: The git command we would have run
+            process_tags: Process tags as if they were aliases
+        """
+        col = terminal.Color()
+        print 'Dry run, so not doing much. But I would do this:'
+        print
+        print 'Send a total of %d patch%s with %scover letter.' % (
+                len(args), '' if len(args) == 1 else 'es',
+                self.get('cover') and 'a ' or 'no ')
+
+        # TODO: Colour the patches according to whether they passed checks
+        for upto in range(len(args)):
+            commit = self.commits[upto]
+            print col.Color(col.GREEN, '   %s' % args[upto])
+            cc_list = []
+            if process_tags:
+                cc_list += gitutil.BuildEmailList(commit.tags)
+            cc_list += gitutil.BuildEmailList(commit.cc_list)
+
+            for email in cc_list:
+                if email == None:
+                    email = col.Color(col.YELLOW, "<alias '%s' not found>"
+                            % tag)
+                if email:
+                    print '      Cc: ',email
+        print
+        for item in gitutil.BuildEmailList(self.get('to', '<none>')):
+            print 'To:\t ', item
+        for item in gitutil.BuildEmailList(self.cc):
+            print 'Cc:\t ', item
+        print 'Version: ', self.get('version')
+        print 'Prefix:\t ', self.get('prefix')
+        if self.cover:
+            print 'Cover: %d lines' % len(self.cover)
+        if cmd:
+            print 'Git command: %s' % cmd
+
+    def MakeChangeLog(self, commit):
+        """Create a list of changes for each version.
+
+        Return:
+            The change log as a list of strings, one per line
+
+            Changes in v1:
+            - Fix the widget
+            - Jog the dial
+
+            Changes in v2:
+            - Jog the dial back closer to the widget
+
+            etc.
+        """
+        final = []
+        need_blank = False
+        for change in sorted(self.changes):
+            out = []
+            for this_commit, text in self.changes[change]:
+                if commit and this_commit != commit:
+                    continue
+                if text not in out:
+                    out.append(text)
+            if out:
+                out = ['Changes in v%d:' % change] + sorted(out)
+                if need_blank:
+                    out = [''] + out
+                final += out
+                need_blank = True
+        if self.changes:
+            final.append('')
+        return final
+
+    def DoChecks(self):
+        """Check that each version has a change log
+
+        Print an error if something is wrong.
+        """
+        col = terminal.Color()
+        if self.get('version'):
+            changes_copy = dict(self.changes)
+            for version in range(2, int(self.version) + 1):
+                if self.changes.get(version):
+                    del changes_copy[version]
+                else:
+                    str = 'Change log missing for v%d' % version
+                    print col.Color(col.RED, str)
+            for version in changes_copy:
+                str = 'Change log for unknown version v%d' % version
+                print col.Color(col.RED, str)
+        elif self.changes:
+            str = 'Change log exists, but no version is set'
+            print col.Color(col.RED, str)
+
+    def MakeCcFile(self, process_tags):
+        """Make a cc file for us to use for per-commit Cc automation
+
+        Args:
+            process_tags: Process tags as if they were aliases
+        Return:
+            Filename of temp file created
+        """
+        # Look for commit tags (of the form 'xxx:' at the start of the subject)
+        fname = '/tmp/patman.%d' % os.getpid()
+        fd = open(fname, 'w')
+        for commit in self.commits:
+            list = []
+            if process_tags:
+                list += gitutil.BuildEmailList(commit.tags)
+            list += gitutil.BuildEmailList(commit.cc_list)
+            print >>fd, commit.patch, ', '.join(list)
+
+        fd.close()
+        return fname
+
+    def AddChange(self, version, commit, info):
+        """Add a new change line to a version.
+
+        This will later appear in the change log.
+
+        Args:
+            version: version number to add change list to
+            info: change line for this version
+        """
+        if not self.changes.get(version):
+            self.changes[version] = []
+        self.changes[version].append([commit, info])
+
+    def GetPatchPrefix(self):
+        """Get the patch version string
+
+        Return:
+            Patch string, like 'RFC PATCH v5' or just 'PATCH'
+        """
+        version = ''
+        if self.get('version'):
+            version = ' v%s' % self['version']
+
+        # Get patch name prefix
+        prefix = ''
+        if self.get('prefix'):
+            prefix = '%s ' % self['prefix']
+        return '%sPATCH%s' % (prefix, version)