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git_multimail.py
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git_multimail.py
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#! /usr/bin/env python2
# Copyright (c) 2012,2013 Michael Haggerty
# Derived from contrib/hooks/post-receive-email, which is
# Copyright (c) 2007 Andy Parkins
# and also includes contributions by other authors.
#
# This file is part of git-multimail.
#
# git-multimail is free software: you can redistribute it and/or
# modify it under the terms of the GNU General Public License version
# 2 as published by the Free Software Foundation.
#
# 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, see
# <http://www.gnu.org/licenses/>.
"""Generate notification emails for pushes to a git repository.
This hook sends emails describing changes introduced by pushes to a
git repository. For each reference that was changed, it emits one
ReferenceChange email summarizing how the reference was changed,
followed by one Revision email for each new commit that was introduced
by the reference change.
Each commit is announced in exactly one Revision email. If the same
commit is merged into another branch in the same or a later push, then
the ReferenceChange email will list the commit's SHA1 and its one-line
summary, but no new Revision email will be generated.
This script is designed to be used as a "post-receive" hook in a git
repository (see githooks(5)). It can also be used as an "update"
script, but this usage is not completely reliable and is deprecated.
To help with debugging, this script accepts a --stdout option, which
causes the emails to be written to standard output rather than sent
using sendmail.
See the accompanying README file for the complete documentation.
"""
import sys
import os
import re
import bisect
import subprocess
import shlex
import optparse
import smtplib
try:
from email.utils import make_msgid
from email.utils import getaddresses
from email.utils import formataddr
from email.header import Header
except ImportError:
# Prior to Python 2.5, the email module used different names:
from email.Utils import make_msgid
from email.Utils import getaddresses
from email.Utils import formataddr
from email.Header import Header
DEBUG = False
ZEROS = '0' * 40
LOGBEGIN = '- Log -----------------------------------------------------------------\n'
LOGEND = '-----------------------------------------------------------------------\n'
ADDR_HEADERS = set(['from', 'to', 'cc', 'bcc', 'reply-to', 'sender'])
# It is assumed in many places that the encoding is uniformly UTF-8,
# so changing these constants is unsupported. But define them here
# anyway, to make it easier to find (at least most of) the places
# where the encoding is important.
(ENCODING, CHARSET) = ('UTF-8', 'utf-8')
REF_CREATED_SUBJECT_TEMPLATE = (
'%(emailprefix)s%(refname_type)s %(short_refname)s created'
' (now %(newrev_short)s)'
)
REF_UPDATED_SUBJECT_TEMPLATE = (
'%(emailprefix)s%(refname_type)s %(short_refname)s updated'
' (%(oldrev_short)s -> %(newrev_short)s)'
)
REF_DELETED_SUBJECT_TEMPLATE = (
'%(emailprefix)s%(refname_type)s %(short_refname)s deleted'
' (was %(oldrev_short)s)'
)
REFCHANGE_HEADER_TEMPLATE = """\
To: %(recipients)s
Subject: %(subject)s
MIME-Version: 1.0
Content-Type: text/plain; charset=%(charset)s
Content-Transfer-Encoding: 8bit
Message-ID: %(msgid)s
From: %(fromaddr)s
Reply-To: %(reply_to)s
X-Git-Repo: %(repo_shortname)s
X-Git-Refname: %(refname)s
X-Git-Reftype: %(refname_type)s
X-Git-Oldrev: %(oldrev)s
X-Git-Newrev: %(newrev)s
Auto-Submitted: auto-generated
"""
REFCHANGE_INTRO_TEMPLATE = """\
This is an automated email from the git hooks/post-receive script.
%(pusher)s pushed a change to %(refname_type)s %(short_refname)s
in repository %(repo_shortname)s.
"""
FOOTER_TEMPLATE = """\
-- \n\
To stop receiving notification emails like this one, please contact
%(administrator)s.
"""
REWIND_ONLY_TEMPLATE = """\
This update removed existing revisions from the reference, leaving the
reference pointing at a previous point in the repository history.
* -- * -- N %(refname)s (%(newrev_short)s)
\\
O -- O -- O (%(oldrev_short)s)
Any revisions marked "omits" are not gone; other references still
refer to them. Any revisions marked "discards" are gone forever.
"""
NON_FF_TEMPLATE = """\
This update added new revisions after undoing existing revisions.
That is to say, some revisions that were in the old version of the
%(refname_type)s are not in the new version. This situation occurs
when a user --force pushes a change and generates a repository
containing something like this:
* -- * -- B -- O -- O -- O (%(oldrev_short)s)
\\
N -- N -- N %(refname)s (%(newrev_short)s)
You should already have received notification emails for all of the O
revisions, and so the following emails describe only the N revisions
from the common base, B.
Any revisions marked "omits" are not gone; other references still
refer to them. Any revisions marked "discards" are gone forever.
"""
NO_NEW_REVISIONS_TEMPLATE = """\
No new revisions were added by this update.
"""
DISCARDED_REVISIONS_TEMPLATE = """\
This change permanently discards the following revisions:
"""
NO_DISCARDED_REVISIONS_TEMPLATE = """\
The revisions that were on this %(refname_type)s are still contained in
other references; therefore, this change does not discard any commits
from the repository.
"""
NEW_REVISIONS_TEMPLATE = """\
The %(tot)s revisions listed above as "new" are entirely new to this
repository and will be described in separate emails. The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.
"""
TAG_CREATED_TEMPLATE = """\
at %(newrev_short)-9s (%(newrev_type)s)
"""
TAG_UPDATED_TEMPLATE = """\
*** WARNING: tag %(short_refname)s was modified! ***
from %(oldrev_short)-9s (%(oldrev_type)s)
to %(newrev_short)-9s (%(newrev_type)s)
"""
TAG_DELETED_TEMPLATE = """\
*** WARNING: tag %(short_refname)s was deleted! ***
"""
# The template used in summary tables. It looks best if this uses the
# same alignment as TAG_CREATED_TEMPLATE and TAG_UPDATED_TEMPLATE.
BRIEF_SUMMARY_TEMPLATE = """\
%(action)10s %(rev_short)-9s %(text)s
"""
NON_COMMIT_UPDATE_TEMPLATE = """\
This is an unusual reference change because the reference did not
refer to a commit either before or after the change. We do not know
how to provide full information about this reference change.
"""
REVISION_HEADER_TEMPLATE = """\
To: %(recipients)s
Subject: %(emailprefix)s%(num)02d/%(tot)02d: %(oneline)s
MIME-Version: 1.0
Content-Type: text/plain; charset=%(charset)s
Content-Transfer-Encoding: 8bit
From: %(fromaddr)s
Reply-To: %(reply_to)s
In-Reply-To: %(reply_to_msgid)s
References: %(reply_to_msgid)s
X-Git-Repo: %(repo_shortname)s
X-Git-Refname: %(refname)s
X-Git-Reftype: %(refname_type)s
X-Git-Rev: %(rev)s
Auto-Submitted: auto-generated
"""
REVISION_INTRO_TEMPLATE = """\
This is an automated email from the git hooks/post-receive script.
%(pusher)s pushed a commit to %(refname_type)s %(short_refname)s
in repository %(repo_shortname)s.
"""
REVISION_FOOTER_TEMPLATE = FOOTER_TEMPLATE
class CommandError(Exception):
def __init__(self, cmd, retcode):
self.cmd = cmd
self.retcode = retcode
Exception.__init__(
self,
'Command "%s" failed with retcode %s' % (' '.join(cmd), retcode,)
)
class ConfigurationException(Exception):
pass
def read_git_output(args, input=None, keepends=False, **kw):
"""Read the output of a Git command."""
return read_output(
['git', '-c', 'i18n.logoutputencoding=%s' % (ENCODING,)] + args,
input=input, keepends=keepends, **kw
)
def read_output(cmd, input=None, keepends=False, **kw):
if input:
stdin = subprocess.PIPE
else:
stdin = None
p = subprocess.Popen(
cmd, stdin=stdin, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kw
)
(out, err) = p.communicate(input)
retcode = p.wait()
if retcode:
raise CommandError(cmd, retcode)
if not keepends:
out = out.rstrip('\n\r')
return out
def read_git_lines(args, keepends=False, **kw):
"""Return the lines output by Git command.
Return as single lines, with newlines stripped off."""
return read_git_output(args, keepends=True, **kw).splitlines(keepends)
def header_encode(text, header_name=None):
"""Encode and line-wrap the value of an email header field."""
try:
if isinstance(text, str):
text = text.decode(ENCODING, errors='replace')
return Header(text, header_name=header_name).encode()
except UnicodeEncodeError:
return Header(text, header_name=header_name, charset=CHARSET,
errors='replace').encode()
def addr_header_encode(text, header_name=None):
"""Encode and line-wrap the value of an email header field containing
email addresses."""
return Header(
', '.join(
formataddr((header_encode(name), emailaddr))
for name, emailaddr in getaddresses([text])
),
header_name=header_name
).encode()
class Config(object):
def __init__(self, section, git_config=None):
"""Represent a section of the git configuration.
If git_config is specified, it is passed to "git config" in
the GIT_CONFIG environment variable, meaning that "git config"
will read the specified path rather than the Git default
config paths."""
self.section = section
if git_config:
self.env = os.environ.copy()
self.env['GIT_CONFIG'] = git_config
else:
self.env = None
@staticmethod
def _split(s):
"""Split NUL-terminated values."""
words = s.split('\0')
assert words[-1] == ''
return words[:-1]
def get(self, name, default=None):
try:
values = self._split(read_git_output(
['config', '--get', '--null', '%s.%s' % (self.section, name)],
env=self.env, keepends=True,
))
assert len(values) == 1
return values[0]
except CommandError:
return default
def get_bool(self, name, default=None):
try:
value = read_git_output(
['config', '--get', '--bool', '%s.%s' % (self.section, name)],
env=self.env,
)
except CommandError:
return default
return value == 'true'
def get_all(self, name, default=None):
"""Read a (possibly multivalued) setting from the configuration.
Return the result as a list of values, or default if the name
is unset."""
try:
return self._split(read_git_output(
['config', '--get-all', '--null', '%s.%s' % (self.section, name)],
env=self.env, keepends=True,
))
except CommandError, e:
if e.retcode == 1:
# "the section or key is invalid"; i.e., there is no
# value for the specified key.
return default
else:
raise
def get_recipients(self, name, default=None):
"""Read a recipients list from the configuration.
Return the result as a comma-separated list of email
addresses, or default if the option is unset. If the setting
has multiple values, concatenate them with comma separators."""
lines = self.get_all(name, default=None)
if lines is None:
return default
return ', '.join(line.strip() for line in lines)
def set(self, name, value):
read_git_output(
['config', '%s.%s' % (self.section, name), value],
env=self.env,
)
def add(self, name, value):
read_git_output(
['config', '--add', '%s.%s' % (self.section, name), value],
env=self.env,
)
def has_key(self, name):
return self.get_all(name, default=None) is not None
def unset_all(self, name):
try:
read_git_output(
['config', '--unset-all', '%s.%s' % (self.section, name)],
env=self.env,
)
except CommandError, e:
if e.retcode == 5:
# The name doesn't exist, which is what we wanted anyway...
pass
else:
raise
def set_recipients(self, name, value):
self.unset_all(name)
for pair in getaddresses([value]):
self.add(name, formataddr(pair))
def generate_summaries(*log_args):
"""Generate a brief summary for each revision requested.
log_args are strings that will be passed directly to "git log" as
revision selectors. Iterate over (sha1_short, subject) for each
commit specified by log_args (subject is the first line of the
commit message as a string without EOLs)."""
cmd = [
'log', '--abbrev', '--format=%h %s',
] + list(log_args) + ['--']
for line in read_git_lines(cmd):
yield tuple(line.split(' ', 1))
def limit_lines(lines, max_lines):
for (index, line) in enumerate(lines):
if index < max_lines:
yield line
if index >= max_lines:
yield '... %d lines suppressed ...\n' % (index + 1 - max_lines,)
def limit_linelength(lines, max_linelength):
for line in lines:
# Don't forget that lines always include a trailing newline.
if len(line) > max_linelength + 1:
line = line[:max_linelength - 7] + ' [...]\n'
yield line
class CommitSet(object):
"""A (constant) set of object names.
The set should be initialized with full SHA1 object names. The
__contains__() method returns True iff its argument is an
abbreviation of any the names in the set."""
def __init__(self, names):
self._names = sorted(names)
def __len__(self):
return len(self._names)
def __contains__(self, sha1_abbrev):
"""Return True iff this set contains sha1_abbrev (which might be abbreviated)."""
i = bisect.bisect_left(self._names, sha1_abbrev)
return i < len(self) and self._names[i].startswith(sha1_abbrev)
class GitObject(object):
def __init__(self, sha1, type=None):
if sha1 == ZEROS:
self.sha1 = self.type = self.commit_sha1 = None
else:
self.sha1 = sha1
self.type = type or read_git_output(['cat-file', '-t', self.sha1])
if self.type == 'commit':
self.commit_sha1 = self.sha1
elif self.type == 'tag':
try:
self.commit_sha1 = read_git_output(
['rev-parse', '--verify', '%s^0' % (self.sha1,)]
)
except CommandError:
# Cannot deref tag to determine commit_sha1
self.commit_sha1 = None
else:
self.commit_sha1 = None
self.short = read_git_output(['rev-parse', '--short', sha1])
def get_summary(self):
"""Return (sha1_short, subject) for this commit."""
if not self.sha1:
raise ValueError('Empty commit has no summary')
return iter(generate_summaries('--no-walk', self.sha1)).next()
def __eq__(self, other):
return isinstance(other, GitObject) and self.sha1 == other.sha1
def __hash__(self):
return hash(self.sha1)
def __nonzero__(self):
return bool(self.sha1)
def __str__(self):
return self.sha1 or ZEROS
class Change(object):
"""A Change that has been made to the Git repository.
Abstract class from which both Revisions and ReferenceChanges are
derived. A Change knows how to generate a notification email
describing itself."""
def __init__(self, environment):
self.environment = environment
self._values = None
def _compute_values(self):
"""Return a dictionary {keyword : expansion} for this Change.
Derived classes overload this method to add more entries to
the return value. This method is used internally by
get_values(). The return value should always be a new
dictionary."""
return self.environment.get_values()
def get_values(self, **extra_values):
"""Return a dictionary {keyword : expansion} for this Change.
Return a dictionary mapping keywords to the values that they
should be expanded to for this Change (used when interpolating
template strings). If any keyword arguments are supplied, add
those to the return value as well. The return value is always
a new dictionary."""
if self._values is None:
self._values = self._compute_values()
values = self._values.copy()
if extra_values:
values.update(extra_values)
return values
def expand(self, template, **extra_values):
"""Expand template.
Expand the template (which should be a string) using string
interpolation of the values for this Change. If any keyword
arguments are provided, also include those in the keywords
available for interpolation."""
return template % self.get_values(**extra_values)
def expand_lines(self, template, **extra_values):
"""Break template into lines and expand each line."""
values = self.get_values(**extra_values)
for line in template.splitlines(True):
yield line % values
def expand_header_lines(self, template, **extra_values):
"""Break template into lines and expand each line as an RFC 2822 header.
Encode values and split up lines that are too long. Silently
skip lines that contain references to unknown variables."""
values = self.get_values(**extra_values)
for line in template.splitlines():
(name, value) = line.split(':', 1)
try:
value = value % values
except KeyError, e:
if DEBUG:
sys.stderr.write(
'Warning: unknown variable %r in the following line; line skipped:\n'
' %s\n'
% (e.args[0], line,)
)
else:
if name.lower() in ADDR_HEADERS:
value = addr_header_encode(value, name)
else:
value = header_encode(value, name)
for splitline in ('%s: %s\n' % (name, value)).splitlines(True):
yield splitline
def generate_email_header(self):
"""Generate the RFC 2822 email headers for this Change, a line at a time.
The output should not include the trailing blank line."""
raise NotImplementedError()
def generate_email_intro(self):
"""Generate the email intro for this Change, a line at a time.
The output will be used as the standard boilerplate at the top
of the email body."""
raise NotImplementedError()
def generate_email_body(self):
"""Generate the main part of the email body, a line at a time.
The text in the body might be truncated after a specified
number of lines (see multimailhook.emailmaxlines)."""
raise NotImplementedError()
def generate_email_footer(self):
"""Generate the footer of the email, a line at a time.
The footer is always included, irrespective of
multimailhook.emailmaxlines."""
raise NotImplementedError()
def generate_email(self, push, body_filter=None):
"""Generate an email describing this change.
Iterate over the lines (including the header lines) of an
email describing this change. If body_filter is not None,
then use it to filter the lines that are intended for the
email body."""
for line in self.generate_email_header():
yield line
yield '\n'
for line in self.generate_email_intro():
yield line
body = self.generate_email_body(push)
if body_filter is not None:
body = body_filter(body)
for line in body:
yield line
for line in self.generate_email_footer():
yield line
class Revision(Change):
"""A Change consisting of a single git commit."""
def __init__(self, reference_change, rev, num, tot):
Change.__init__(self, reference_change.environment)
self.reference_change = reference_change
self.rev = rev
self.change_type = self.reference_change.change_type
self.refname = self.reference_change.refname
self.num = num
self.tot = tot
self.author = read_git_output(['log', '--no-walk', '--format=%aN <%aE>', self.rev.sha1])
self.recipients = self.environment.get_revision_recipients(self)
def _compute_values(self):
values = Change._compute_values(self)
oneline = read_git_output(
['log', '--format=%s', '--no-walk', self.rev.sha1]
)
values['rev'] = self.rev.sha1
values['rev_short'] = self.rev.short
values['change_type'] = self.change_type
values['refname'] = self.refname
values['short_refname'] = self.reference_change.short_refname
values['refname_type'] = self.reference_change.refname_type
values['reply_to_msgid'] = self.reference_change.msgid
values['num'] = self.num
values['tot'] = self.tot
values['recipients'] = self.recipients
values['oneline'] = oneline
values['author'] = self.author
reply_to = self.environment.get_reply_to_commit(self)
if reply_to:
values['reply_to'] = reply_to
return values
def generate_email_header(self):
for line in self.expand_header_lines(REVISION_HEADER_TEMPLATE):
yield line
def generate_email_intro(self):
for line in self.expand_lines(REVISION_INTRO_TEMPLATE):
yield line
def generate_email_body(self, push):
"""Show this revision."""
return read_git_lines(
[
'log', '-C',
'--stat', '-p', '--cc',
'-1', self.rev.sha1,
],
keepends=True,
)
def generate_email_footer(self):
return self.expand_lines(REVISION_FOOTER_TEMPLATE)
class ReferenceChange(Change):
"""A Change to a Git reference.
An abstract class representing a create, update, or delete of a
Git reference. Derived classes handle specific types of reference
(e.g., tags vs. branches). These classes generate the main
reference change email summarizing the reference change and
whether it caused any any commits to be added or removed.
ReferenceChange objects are usually created using the static
create() method, which has the logic to decide which derived class
to instantiate."""
REF_RE = re.compile(r'^refs\/(?P<area>[^\/]+)\/(?P<shortname>.*)$')
@staticmethod
def create(environment, oldrev, newrev, refname):
"""Return a ReferenceChange object representing the change.
Return an object that represents the type of change that is being
made. oldrev and newrev should be SHA1s or ZEROS."""
old = GitObject(oldrev)
new = GitObject(newrev)
rev = new or old
# The revision type tells us what type the commit is, combined with
# the location of the ref we can decide between
# - working branch
# - tracking branch
# - unannotated tag
# - annotated tag
m = ReferenceChange.REF_RE.match(refname)
if m:
area = m.group('area')
short_refname = m.group('shortname')
else:
area = ''
short_refname = refname
if rev.type == 'tag':
# Annotated tag:
klass = AnnotatedTagChange
elif rev.type == 'commit':
if area == 'tags':
# Non-annotated tag:
klass = NonAnnotatedTagChange
elif area == 'heads':
# Branch:
klass = BranchChange
elif area == 'remotes':
# Tracking branch:
sys.stderr.write(
'*** Push-update of tracking branch %r\n'
'*** - incomplete email generated.\n'
% (refname,)
)
klass = OtherReferenceChange
else:
# Some other reference namespace:
sys.stderr.write(
'*** Push-update of strange reference %r\n'
'*** - incomplete email generated.\n'
% (refname,)
)
klass = OtherReferenceChange
else:
# Anything else (is there anything else?)
sys.stderr.write(
'*** Unknown type of update to %r (%s)\n'
'*** - incomplete email generated.\n'
% (refname, rev.type,)
)
klass = OtherReferenceChange
return klass(
environment,
refname=refname, short_refname=short_refname,
old=old, new=new, rev=rev,
)
def __init__(self, environment, refname, short_refname, old, new, rev):
Change.__init__(self, environment)
self.change_type = {
(False, True) : 'create',
(True, True) : 'update',
(True, False) : 'delete',
}[bool(old), bool(new)]
self.refname = refname
self.short_refname = short_refname
self.old = old
self.new = new
self.rev = rev
self.msgid = make_msgid()
self.diffopts = environment.diffopts
self.logopts = environment.logopts
self.showlog = environment.refchange_showlog
def _compute_values(self):
values = Change._compute_values(self)
values['change_type'] = self.change_type
values['refname_type'] = self.refname_type
values['refname'] = self.refname
values['short_refname'] = self.short_refname
values['msgid'] = self.msgid
values['recipients'] = self.recipients
values['oldrev'] = str(self.old)
values['oldrev_short'] = self.old.short
values['newrev'] = str(self.new)
values['newrev_short'] = self.new.short
if self.old:
values['oldrev_type'] = self.old.type
if self.new:
values['newrev_type'] = self.new.type
reply_to = self.environment.get_reply_to_refchange(self)
if reply_to:
values['reply_to'] = reply_to
return values
def get_subject(self):
template = {
'create' : REF_CREATED_SUBJECT_TEMPLATE,
'update' : REF_UPDATED_SUBJECT_TEMPLATE,
'delete' : REF_DELETED_SUBJECT_TEMPLATE,
}[self.change_type]
return self.expand(template)
def generate_email_header(self):
for line in self.expand_header_lines(
REFCHANGE_HEADER_TEMPLATE, subject=self.get_subject(),
):
yield line
def generate_email_intro(self):
for line in self.expand_lines(REFCHANGE_INTRO_TEMPLATE):
yield line
def generate_email_body(self, push):
"""Call the appropriate body-generation routine.
Call one of generate_create_summary() /
generate_update_summary() / generate_delete_summary()."""
change_summary = {
'create' : self.generate_create_summary,
'delete' : self.generate_delete_summary,
'update' : self.generate_update_summary,
}[self.change_type](push)
for line in change_summary:
yield line
for line in self.generate_revision_change_summary(push):
yield line
def generate_email_footer(self):
return self.expand_lines(FOOTER_TEMPLATE)
def generate_revision_change_log(self, new_commits_list):
if self.showlog:
yield '\n'
yield 'Detailed log of new commits:\n\n'
for line in read_git_lines(
['log', '--no-walk']
+ self.logopts
+ new_commits_list
+ ['--'],
keepends=True,
):
yield line
def generate_revision_change_summary(self, push):
"""Generate a summary of the revisions added/removed by this change."""
if self.new.commit_sha1 and not self.old.commit_sha1:
# A new reference was created. List the new revisions
# brought by the new reference (i.e., those revisions that
# were not in the repository before this reference
# change).
sha1s = list(push.get_new_commits(self))
sha1s.reverse()
tot = len(sha1s)
new_revisions = [
Revision(self, GitObject(sha1), num=i+1, tot=tot)
for (i, sha1) in enumerate(sha1s)
]
if new_revisions:
yield self.expand('This %(refname_type)s includes the following new commits:\n')
yield '\n'
for r in new_revisions:
(sha1, subject) = r.rev.get_summary()
yield r.expand(
BRIEF_SUMMARY_TEMPLATE, action='new', text=subject,
)
yield '\n'
for line in self.expand_lines(NEW_REVISIONS_TEMPLATE, tot=tot):
yield line
for line in self.generate_revision_change_log([r.rev.sha1 for r in new_revisions]):
yield line
else:
for line in self.expand_lines(NO_NEW_REVISIONS_TEMPLATE):
yield line
elif self.new.commit_sha1 and self.old.commit_sha1:
# A reference was changed to point at a different commit.
# List the revisions that were removed and/or added *from
# that reference* by this reference change, along with a
# diff between the trees for its old and new values.
# List of the revisions that were added to the branch by
# this update. Note this list can include revisions that
# have already had notification emails; we want such
# revisions in the summary even though we will not send
# new notification emails for them.
adds = list(generate_summaries(
'--topo-order', '--reverse', '%s..%s'
% (self.old.commit_sha1, self.new.commit_sha1,)
))
# List of the revisions that were removed from the branch
# by this update. This will be empty except for
# non-fast-forward updates.
discards = list(generate_summaries(
'%s..%s' % (self.new.commit_sha1, self.old.commit_sha1,)
))
if adds:
new_commits_list = push.get_new_commits(self)
else:
new_commits_list = []
new_commits = CommitSet(new_commits_list)
if discards:
discarded_commits = CommitSet(push.get_discarded_commits(self))
else:
discarded_commits = CommitSet([])
if discards and adds:
for (sha1, subject) in discards:
if sha1 in discarded_commits:
action = 'discards'
else:
action = 'omits'
yield self.expand(
BRIEF_SUMMARY_TEMPLATE, action=action,
rev_short=sha1, text=subject,
)
for (sha1, subject) in adds:
if sha1 in new_commits:
action = 'new'
else:
action = 'adds'
yield self.expand(
BRIEF_SUMMARY_TEMPLATE, action=action,
rev_short=sha1, text=subject,
)
yield '\n'
for line in self.expand_lines(NON_FF_TEMPLATE):
yield line
elif discards:
for (sha1, subject) in discards:
if sha1 in discarded_commits:
action = 'discards'