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Diffstat (limited to 'contrib/hooks/multimail/git_multimail.py')
| -rwxr-xr-x | contrib/hooks/multimail/git_multimail.py | 2539 |
1 files changed, 2539 insertions, 0 deletions
diff --git a/contrib/hooks/multimail/git_multimail.py b/contrib/hooks/multimail/git_multimail.py new file mode 100755 index 0000000000..8b58ed6444 --- /dev/null +++ b/contrib/hooks/multimail/git_multimail.py @@ -0,0 +1,2539 @@ +#! /usr/bin/env python2 + +# Copyright (c) 2012-2014 Michael Haggerty and others +# 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 socket +import subprocess +import shlex +import optparse +import smtplib +import time + +try: + from email.utils import make_msgid + from email.utils import getaddresses + from email.utils import formataddr + from email.utils import formatdate + 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.Utils import formatdate + 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 = """\ +Date: %(send_date)s +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-Host: %(fqdn)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 = """\ +Date: %(send_date)s +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-Host: %(fqdn)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 + + +# The "git" program (this could be changed to include a full path): +GIT_EXECUTABLE = 'git' + + +# How "git" should be invoked (including global arguments), as a list +# of words. This variable is usually initialized automatically by +# read_git_output() via choose_git_command(), but if a value is set +# here then it will be used unconditionally. +GIT_CMD = None + + +def choose_git_command(): + """Decide how to invoke git, and record the choice in GIT_CMD.""" + + global GIT_CMD + + if GIT_CMD is None: + try: + # Check to see whether the "-c" option is accepted (it was + # only added in Git 1.7.2). We don't actually use the + # output of "git --version", though if we needed more + # specific version information this would be the place to + # do it. + cmd = [GIT_EXECUTABLE, '-c', 'foo.bar=baz', '--version'] + read_output(cmd) + GIT_CMD = [GIT_EXECUTABLE, '-c', 'i18n.logoutputencoding=%s' % (ENCODING,)] + except CommandError: + GIT_CMD = [GIT_EXECUTABLE] + + +def read_git_output(args, input=None, keepends=False, **kw): + """Read the output of a Git command.""" + + if GIT_CMD is None: + choose_git_command() + + return read_output(GIT_CMD + 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, '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, extra_header_values={}): + """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. + + The extra_header_values field is received as a dict and not as + **kwargs, to allow passing other keyword arguments in the + future (e.g. passing extra values to generate_email_intro()""" + + for line in self.generate_email_header(**extra_header_values): + 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, **extra_values): + for line in self.expand_header_lines( + REVISION_HEADER_TEMPLATE, **extra_values + ): + 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'] + self.environment.commitlogopts + ['-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.commitlogopts = environment.commitlogopts + 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, **extra_values): + if 'subject' not in extra_values: + extra_values['subject'] = self.get_subject() + + for line in self.expand_header_lines( + REFCHANGE_HEADER_TEMPLATE, **extra_values + ): + 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' + else: + action = 'omits' + yield self.expand( + BRIEF_SUMMARY_TEMPLATE, action=action, + rev_short=sha1, text=subject, + ) + yield '\n' + for line in self.expand_lines(REWIND_ONLY_TEMPLATE): + yield line + + elif adds: + (sha1, subject) = self.old.get_summary() + yield self.expand( + BRIEF_SUMMARY_TEMPLATE, action='from', + 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' + + if new_commits: + for line in self.expand_lines(NEW_REVISIONS_TEMPLATE, tot=len(new_commits)): + yield line + for line in self.generate_revision_change_log(new_commits_list): + yield line + else: + for line in self.expand_lines(NO_NEW_REVISIONS_TEMPLATE): + yield line + + # The diffstat is shown from the old revision to the new + # revision. This is to show the truth of what happened in + # this change. There's no point showing the stat from the + # base to the new revision because the base is effectively a + # random revision at this point - the user will be interested + # in what this revision changed - including the undoing of + # previous revisions in the case of non-fast-forward updates. + yield '\n' + yield 'Summary of changes:\n' + for line in read_git_lines( + ['diff-tree'] + + self.diffopts + + ['%s..%s' % (self.old.commit_sha1, self.new.commit_sha1,)], + keepends=True, + ): + yield line + + elif self.old.commit_sha1 and not self.new.commit_sha1: + # A reference was deleted. List the revisions that were + # removed from the repository by this reference change. + + sha1s = list(push.get_discarded_commits(self)) + tot = len(sha1s) + discarded_revisions = [ + Revision(self, GitObject(sha1), num=i+1, tot=tot) + for (i, sha1) in enumerate(sha1s) + ] + + if discarded_revisions: + for line in self.expand_lines(DISCARDED_REVISIONS_TEMPLATE): + yield line + yield '\n' + for r in discarded_revisions: + (sha1, subject) = r.rev.get_summary() + yield r.expand( + BRIEF_SUMMARY_TEMPLATE, action='discards', text=subject, + ) + else: + for line in self.expand_lines(NO_DISCARDED_REVISIONS_TEMPLATE): + yield line + + elif not self.old.commit_sha1 and not self.new.commit_sha1: + for line in self.expand_lines(NON_COMMIT_UPDATE_TEMPLATE): + yield line + + def generate_create_summary(self, push): + """Called for the creation of a reference.""" + + # This is a new reference and so oldrev is not valid + (sha1, subject) = self.new.get_summary() + yield self.expand( + BRIEF_SUMMARY_TEMPLATE, action='at', + rev_short=sha1, text=subject, + ) + yield '\n' + + def generate_update_summary(self, push): + """Called for the change of a pre-existing branch.""" + + return iter([]) + + def generate_delete_summary(self, push): + """Called for the deletion of any type of reference.""" + + (sha1, subject) = self.old.get_summary() + yield self.expand( + BRIEF_SUMMARY_TEMPLATE, action='was', + rev_short=sha1, text=subject, + ) + yield '\n' + + +class BranchChange(ReferenceChange): + refname_type = 'branch' + + def __init__(self, environment, refname, short_refname, old, new, rev): + ReferenceChange.__init__( + self, environment, + refname=refname, short_refname=short_refname, + old=old, new=new, rev=rev, + ) + self.recipients = environment.get_refchange_recipients(self) + + +class AnnotatedTagChange(ReferenceChange): + refname_type = 'annotated tag' + + def __init__(self, environment, refname, short_refname, old, new, rev): + ReferenceChange.__init__( + self, environment, + refname=refname, short_refname=short_refname, + old=old, new=new, rev=rev, + ) + self.recipients = environment.get_announce_recipients(self) + self.show_shortlog = environment.announce_show_shortlog + + ANNOTATED_TAG_FORMAT = ( + '%(*objectname)\n' + '%(*objecttype)\n' + '%(taggername)\n' + '%(taggerdate)' + ) + + def describe_tag(self, push): + """Describe the new value of an annotated tag.""" + + # Use git for-each-ref to pull out the individual fields from + # the tag + [tagobject, tagtype, tagger, tagged] = read_git_lines( + ['for-each-ref', '--format=%s' % (self.ANNOTATED_TAG_FORMAT,), self.refname], + ) + + yield self.expand( + BRIEF_SUMMARY_TEMPLATE, action='tagging', + rev_short=tagobject, text='(%s)' % (tagtype,), + ) + if tagtype == 'commit': + # If the tagged object is a commit, then we assume this is a + # release, and so we calculate which tag this tag is + # replacing + try: + prevtag = read_git_output(['describe', '--abbrev=0', '%s^' % (self.new,)]) + except CommandError: + prevtag = None + if prevtag: + yield ' replaces %s\n' % (prevtag,) + else: + prevtag = None + yield ' length %s bytes\n' % (read_git_output(['cat-file', '-s', tagobject]),) + + yield ' tagged by %s\n' % (tagger,) + yield ' on %s\n' % (tagged,) + yield '\n' + + # Show the content of the tag message; this might contain a + # change log or release notes so is worth displaying. + yield LOGBEGIN + contents = list(read_git_lines(['cat-file', 'tag', self.new.sha1], keepends=True)) + contents = contents[contents.index('\n') + 1:] + if contents and contents[-1][-1:] != '\n': + contents.append('\n') + for line in contents: + yield line + + if self.show_shortlog and tagtype == 'commit': + # Only commit tags make sense to have rev-list operations + # performed on them + yield '\n' + if prevtag: + # Show changes since the previous release + revlist = read_git_output( + ['rev-list', '--pretty=short', '%s..%s' % (prevtag, self.new,)], + keepends=True, + ) + else: + # No previous tag, show all the changes since time + # began + revlist = read_git_output( + ['rev-list', '--pretty=short', '%s' % (self.new,)], + keepends=True, + ) + for line in read_git_lines(['shortlog'], input=revlist, keepends=True): + yield line + + yield LOGEND + yield '\n' + + def generate_create_summary(self, push): + """Called for the creation of an annotated tag.""" + + for line in self.expand_lines(TAG_CREATED_TEMPLATE): + yield line + + for line in self.describe_tag(push): + yield line + + def generate_update_summary(self, push): + """Called for the update of an annotated tag. + + This is probably a rare event and may not even be allowed.""" + + for line in self.expand_lines(TAG_UPDATED_TEMPLATE): + yield line + + for line in self.describe_tag(push): + yield line + + def generate_delete_summary(self, push): + """Called when a non-annotated reference is updated.""" + + for line in self.expand_lines(TAG_DELETED_TEMPLATE): + yield line + + yield self.expand(' tag was %(oldrev_short)s\n') + yield '\n' + + +class NonAnnotatedTagChange(ReferenceChange): + refname_type = 'tag' + + def __init__(self, environment, refname, short_refname, old, new, rev): + ReferenceChange.__init__( + self, environment, + refname=refname, short_refname=short_refname, + old=old, new=new, rev=rev, + ) + self.recipients = environment.get_refchange_recipients(self) + + def generate_create_summary(self, push): + """Called for the creation of an annotated tag.""" + + for line in self.expand_lines(TAG_CREATED_TEMPLATE): + yield line + + def generate_update_summary(self, push): + """Called when a non-annotated reference is updated.""" + + for line in self.expand_lines(TAG_UPDATED_TEMPLATE): + yield line + + def generate_delete_summary(self, push): + """Called when a non-annotated reference is updated.""" + + for line in self.expand_lines(TAG_DELETED_TEMPLATE): + yield line + + for line in ReferenceChange.generate_delete_summary(self, push): + yield line + + +class OtherReferenceChange(ReferenceChange): + refname_type = 'reference' + + def __init__(self, environment, refname, short_refname, old, new, rev): + # We use the full refname as short_refname, because otherwise + # the full name of the reference would not be obvious from the + # text of the email. + ReferenceChange.__init__( + self, environment, + refname=refname, short_refname=refname, + old=old, new=new, rev=rev, + ) + self.recipients = environment.get_refchange_recipients(self) + + +class Mailer(object): + """An object that can send emails.""" + + def send(self, lines, to_addrs): + """Send an email consisting of lines. + + lines must be an iterable over the lines constituting the + header and body of the email. to_addrs is a list of recipient + addresses (can be needed even if lines already contains a + "To:" field). It can be either a string (comma-separated list + of email addresses) or a Python list of individual email + addresses. + + """ + + raise NotImplementedError() + + +class SendMailer(Mailer): + """Send emails using 'sendmail -oi -t'.""" + + SENDMAIL_CANDIDATES = [ + '/usr/sbin/sendmail', + '/usr/lib/sendmail', + ] + + @staticmethod + def find_sendmail(): + for path in SendMailer.SENDMAIL_CANDIDATES: + if os.access(path, os.X_OK): + return path + else: + raise ConfigurationException( + 'No sendmail executable found. ' + 'Try setting multimailhook.sendmailCommand.' + ) + + def __init__(self, command=None, envelopesender=None): + """Construct a SendMailer instance. + + command should be the command and arguments used to invoke + sendmail, as a list of strings. If an envelopesender is + provided, it will also be passed to the command, via '-f + envelopesender'.""" + + if command: + self.command = command[:] + else: + self.command = [self.find_sendmail(), '-oi', '-t'] + + if envelopesender: + self.command.extend(['-f', envelopesender]) + + def send(self, lines, to_addrs): + try: + p = subprocess.Popen(self.command, stdin=subprocess.PIPE) + except OSError, e: + sys.stderr.write( + '*** Cannot execute command: %s\n' % ' '.join(self.command) + + '*** %s\n' % str(e) + + '*** Try setting multimailhook.mailer to "smtp"\n' + '*** to send emails without using the sendmail command.\n' + ) + sys.exit(1) + try: + p.stdin.writelines(lines) + except: + sys.stderr.write( + '*** Error while generating commit email\n' + '*** - mail sending aborted.\n' + ) + p.terminate() + raise + else: + p.stdin.close() + retcode = p.wait() + if retcode: + raise CommandError(self.command, retcode) + + +class SMTPMailer(Mailer): + """Send emails using Python's smtplib.""" + + def __init__(self, envelopesender, smtpserver): + if not envelopesender: + sys.stderr.write( + 'fatal: git_multimail: cannot use SMTPMailer without a sender address.\n' + 'please set either multimailhook.envelopeSender or user.email\n' + ) + sys.exit(1) + self.envelopesender = envelopesender + self.smtpserver = smtpserver + try: + self.smtp = smtplib.SMTP(self.smtpserver) + except Exception, e: + sys.stderr.write('*** Error establishing SMTP connection to %s***\n' % self.smtpserver) + sys.stderr.write('*** %s\n' % str(e)) + sys.exit(1) + + def __del__(self): + self.smtp.quit() + + def send(self, lines, to_addrs): + try: + msg = ''.join(lines) + # turn comma-separated list into Python list if needed. + if isinstance(to_addrs, basestring): + to_addrs = [email for (name, email) in getaddresses([to_addrs])] + self.smtp.sendmail(self.envelopesender, to_addrs, msg) + except Exception, e: + sys.stderr.write('*** Error sending email***\n') + sys.stderr.write('*** %s\n' % str(e)) + self.smtp.quit() + sys.exit(1) + + +class OutputMailer(Mailer): + """Write emails to an output stream, bracketed by lines of '=' characters. + + This is intended for debugging purposes.""" + + SEPARATOR = '=' * 75 + '\n' + + def __init__(self, f): + self.f = f + + def send(self, lines, to_addrs): + self.f.write(self.SEPARATOR) + self.f.writelines(lines) + self.f.write(self.SEPARATOR) + + +def get_git_dir(): + """Determine GIT_DIR. + + Determine GIT_DIR either from the GIT_DIR environment variable or + from the working directory, using Git's usual rules.""" + + try: + return read_git_output(['rev-parse', '--git-dir']) + except CommandError: + sys.stderr.write('fatal: git_multimail: not in a git directory\n') + sys.exit(1) + + +class Environment(object): + """Describes the environment in which the push is occurring. + + An Environment object encapsulates information about the local + environment. For example, it knows how to determine: + + * the name of the repository to which the push occurred + + * what user did the push + + * what users want to be informed about various types of changes. + + An Environment object is expected to have the following methods: + + get_repo_shortname() + + Return a short name for the repository, for display + purposes. + + get_repo_path() + + Return the absolute path to the Git repository. + + get_emailprefix() + + Return a string that will be prefixed to every email's + subject. + + get_pusher() + + Return the username of the person who pushed the changes. + This value is used in the email body to indicate who + pushed the change. + + get_pusher_email() (may return None) + + Return the email address of the person who pushed the + changes. The value should be a single RFC 2822 email + address as a string; e.g., "Joe User <user@example.com>" + if available, otherwise "user@example.com". If set, the + value is used as the Reply-To address for refchange + emails. If it is impossible to determine the pusher's + email, this attribute should be set to None (in which case + no Reply-To header will be output). + + get_sender() + + Return the address to be used as the 'From' email address + in the email envelope. + + get_fromaddr() + + Return the 'From' email address used in the email 'From:' + headers. (May be a full RFC 2822 email address like 'Joe + User <user@example.com>'.) + + get_administrator() + + Return the name and/or email of the repository + administrator. This value is used in the footer as the + person to whom requests to be removed from the + notification list should be sent. Ideally, it should + include a valid email address. + + get_reply_to_refchange() + get_reply_to_commit() + + Return the address to use in the email "Reply-To" header, + as a string. These can be an RFC 2822 email address, or + None to omit the "Reply-To" header. + get_reply_to_refchange() is used for refchange emails; + get_reply_to_commit() is used for individual commit + emails. + + They should also define the following attributes: + + announce_show_shortlog (bool) + + True iff announce emails should include a shortlog. + + refchange_showlog (bool) + + True iff refchanges emails should include a detailed log. + + diffopts (list of strings) + + The options that should be passed to 'git diff' for the + summary email. The value should be a list of strings + representing words to be passed to the command. + + logopts (list of strings) + + Analogous to diffopts, but contains options passed to + 'git log' when generating the detailed log for a set of + commits (see refchange_showlog) + + commitlogopts (list of strings) + + The options that should be passed to 'git log' for each + commit mail. The value should be a list of strings + representing words to be passed to the command. + + """ + + REPO_NAME_RE = re.compile(r'^(?P<name>.+?)(?:\.git)$') + + def __init__(self, osenv=None): + self.osenv = osenv or os.environ + self.announce_show_shortlog = False + self.maxcommitemails = 500 + self.diffopts = ['--stat', '--summary', '--find-copies-harder'] + self.logopts = [] + self.refchange_showlog = False + self.commitlogopts = ['-C', '--stat', '-p', '--cc'] + + self.COMPUTED_KEYS = [ + 'administrator', + 'charset', + 'emailprefix', + 'fromaddr', + 'pusher', + 'pusher_email', + 'repo_path', + 'repo_shortname', + 'sender', + ] + + self._values = None + + def get_repo_shortname(self): + """Use the last part of the repo path, with ".git" stripped off if present.""" + + basename = os.path.basename(os.path.abspath(self.get_repo_path())) + m = self.REPO_NAME_RE.match(basename) + if m: + return m.group('name') + else: + return basename + + def get_pusher(self): + raise NotImplementedError() + + def get_pusher_email(self): + return None + + def get_administrator(self): + return 'the administrator of this repository' + + def get_emailprefix(self): + return '' + + def get_repo_path(self): + if read_git_output(['rev-parse', '--is-bare-repository']) == 'true': + path = get_git_dir() + else: + path = read_git_output(['rev-parse', '--show-toplevel']) + return os.path.abspath(path) + + def get_charset(self): + return CHARSET + + def get_values(self): + """Return a dictionary {keyword : expansion} for this Environment. + + This method is called by Change._compute_values(). The keys + in the returned dictionary are available to be used in any of + the templates. The dictionary is created by calling + self.get_NAME() for each of the attributes named in + COMPUTED_KEYS and recording those that do not return None. + The return value is always a new dictionary.""" + + if self._values is None: + values = {} + + for key in self.COMPUTED_KEYS: + value = getattr(self, 'get_%s' % (key,))() + if value is not None: + values[key] = value + + self._values = values + + return self._values.copy() + + def get_refchange_recipients(self, refchange): + """Return the recipients for notifications about refchange. + + Return the list of email addresses to which notifications + about the specified ReferenceChange should be sent.""" + + raise NotImplementedError() + + def get_announce_recipients(self, annotated_tag_change): + """Return the recipients for notifications about annotated_tag_change. + + Return the list of email addresses to which notifications + about the specified AnnotatedTagChange should be sent.""" + + raise NotImplementedError() + + def get_reply_to_refchange(self, refchange): + return self.get_pusher_email() + + def get_revision_recipients(self, revision): + """Return the recipients for messages about revision. + + Return the list of email addresses to which notifications + about the specified Revision should be sent. This method + could be overridden, for example, to take into account the + contents of the revision when deciding whom to notify about + it. For example, there could be a scheme for users to express + interest in particular files or subdirectories, and only + receive notification emails for revisions that affecting those + files.""" + + raise NotImplementedError() + + def get_reply_to_commit(self, revision): + return revision.author + + def filter_body(self, lines): + """Filter the lines intended for an email body. + + lines is an iterable over the lines that would go into the + email body. Filter it (e.g., limit the number of lines, the + line length, character set, etc.), returning another iterable. + See FilterLinesEnvironmentMixin and MaxlinesEnvironmentMixin + for classes implementing this functionality.""" + + return lines + + +class ConfigEnvironmentMixin(Environment): + """A mixin that sets self.config to its constructor's config argument. + + This class's constructor consumes the "config" argument. + + Mixins that need to inspect the config should inherit from this + class (1) to make sure that "config" is still in the constructor + arguments with its own constructor runs and/or (2) to be sure that + self.config is set after construction.""" + + def __init__(self, config, **kw): + super(ConfigEnvironmentMixin, self).__init__(**kw) + self.config = config + + +class ConfigOptionsEnvironmentMixin(ConfigEnvironmentMixin): + """An Environment that reads most of its information from "git config".""" + + def __init__(self, config, **kw): + super(ConfigOptionsEnvironmentMixin, self).__init__( + config=config, **kw + ) + + self.announce_show_shortlog = config.get_bool( + 'announceshortlog', default=self.announce_show_shortlog + ) + + self.refchange_showlog = config.get_bool( + 'refchangeshowlog', default=self.refchange_showlog + ) + + maxcommitemails = config.get('maxcommitemails') + if maxcommitemails is not None: + try: + self.maxcommitemails = int(maxcommitemails) + except ValueError: + sys.stderr.write( + '*** Malformed value for multimailhook.maxCommitEmails: %s\n' % maxcommitemails + + '*** Expected a number. Ignoring.\n' + ) + + diffopts = config.get('diffopts') + if diffopts is not None: + self.diffopts = shlex.split(diffopts) + + logopts = config.get('logopts') + if logopts is not None: + self.logopts = shlex.split(logopts) + + commitlogopts = config.get('commitlogopts') + if commitlogopts is not None: + self.commitlogopts = shlex.split(commitlogopts) + + reply_to = config.get('replyTo') + self.__reply_to_refchange = config.get('replyToRefchange', default=reply_to) + if ( + self.__reply_to_refchange is not None + and self.__reply_to_refchange.lower() == 'author' + ): + raise ConfigurationException( + '"author" is not an allowed setting for replyToRefchange' + ) + self.__reply_to_commit = config.get('replyToCommit', default=reply_to) + + def get_administrator(self): + return ( + self.config.get('administrator') + or self.get_sender() + or super(ConfigOptionsEnvironmentMixin, self).get_administrator() + ) + + def get_repo_shortname(self): + return ( + self.config.get('reponame') + or super(ConfigOptionsEnvironmentMixin, self).get_repo_shortname() + ) + + def get_emailprefix(self): + emailprefix = self.config.get('emailprefix') + if emailprefix and emailprefix.strip(): + return emailprefix.strip() + ' ' + else: + return '[%s] ' % (self.get_repo_shortname(),) + + def get_sender(self): + return self.config.get('envelopesender') + + def get_fromaddr(self): + fromaddr = self.config.get('from') + if fromaddr: + return fromaddr + else: + config = Config('user') + fromname = config.get('name', default='') + fromemail = config.get('email', default='') + if fromemail: + return formataddr([fromname, fromemail]) + else: + return self.get_sender() + + def get_reply_to_refchange(self, refchange): + if self.__reply_to_refchange is None: + return super(ConfigOptionsEnvironmentMixin, self).get_reply_to_refchange(refchange) + elif self.__reply_to_refchange.lower() == 'pusher': + return self.get_pusher_email() + elif self.__reply_to_refchange.lower() == 'none': + return None + else: + return self.__reply_to_refchange + + def get_reply_to_commit(self, revision): + if self.__reply_to_commit is None: + return super(ConfigOptionsEnvironmentMixin, self).get_reply_to_commit(revision) + elif self.__reply_to_commit.lower() == 'author': + return revision.get_author() + elif self.__reply_to_commit.lower() == 'pusher': + return self.get_pusher_email() + elif self.__reply_to_commit.lower() == 'none': + return None + else: + return self.__reply_to_commit + + +class FilterLinesEnvironmentMixin(Environment): + """Handle encoding and maximum line length of body lines. + + emailmaxlinelength (int or None) + + The maximum length of any single line in the email body. + Longer lines are truncated at that length with ' [...]' + appended. + + strict_utf8 (bool) + + If this field is set to True, then the email body text is + expected to be UTF-8. Any invalid characters are + converted to U+FFFD, the Unicode replacement character + (encoded as UTF-8, of course). + + """ + + def __init__(self, strict_utf8=True, emailmaxlinelength=500, **kw): + super(FilterLinesEnvironmentMixin, self).__init__(**kw) + self.__strict_utf8 = strict_utf8 + self.__emailmaxlinelength = emailmaxlinelength + + def filter_body(self, lines): + lines = super(FilterLinesEnvironmentMixin, self).filter_body(lines) + if self.__strict_utf8: + lines = (line.decode(ENCODING, 'replace') for line in lines) + # Limit the line length in Unicode-space to avoid + # splitting characters: + if self.__emailmaxlinelength: + lines = limit_linelength(lines, self.__emailmaxlinelength) + lines = (line.encode(ENCODING, 'replace') for line in lines) + elif self.__emailmaxlinelength: + lines = limit_linelength(lines, self.__emailmaxlinelength) + + return lines + + +class ConfigFilterLinesEnvironmentMixin( + ConfigEnvironmentMixin, + FilterLinesEnvironmentMixin, + ): + """Handle encoding and maximum line length based on config.""" + + def __init__(self, config, **kw): + strict_utf8 = config.get_bool('emailstrictutf8', default=None) + if strict_utf8 is not None: + kw['strict_utf8'] = strict_utf8 + + emailmaxlinelength = config.get('emailmaxlinelength') + if emailmaxlinelength is not None: + kw['emailmaxlinelength'] = int(emailmaxlinelength) + + super(ConfigFilterLinesEnvironmentMixin, self).__init__( + config=config, **kw + ) + + +class MaxlinesEnvironmentMixin(Environment): + """Limit the email body to a specified number of lines.""" + + def __init__(self, emailmaxlines, **kw): + super(MaxlinesEnvironmentMixin, self).__init__(**kw) + self.__emailmaxlines = emailmaxlines + + def filter_body(self, lines): + lines = super(MaxlinesEnvironmentMixin, self).filter_body(lines) + if self.__emailmaxlines: + lines = limit_lines(lines, self.__emailmaxlines) + return lines + + +class ConfigMaxlinesEnvironmentMixin( + ConfigEnvironmentMixin, + MaxlinesEnvironmentMixin, + ): + """Limit the email body to the number of lines specified in config.""" + + def __init__(self, config, **kw): + emailmaxlines = int(config.get('emailmaxlines', default='0')) + super(ConfigMaxlinesEnvironmentMixin, self).__init__( + config=config, + emailmaxlines=emailmaxlines, + **kw + ) + + +class FQDNEnvironmentMixin(Environment): + """A mixin that sets the host's FQDN to its constructor argument.""" + + def __init__(self, fqdn, **kw): + super(FQDNEnvironmentMixin, self).__init__(**kw) + self.COMPUTED_KEYS += ['fqdn'] + self.__fqdn = fqdn + + def get_fqdn(self): + """Return the fully-qualified domain name for this host. + + Return None if it is unavailable or unwanted.""" + + return self.__fqdn + + +class ConfigFQDNEnvironmentMixin( + ConfigEnvironmentMixin, + FQDNEnvironmentMixin, + ): + """Read the FQDN from the config.""" + + def __init__(self, config, **kw): + fqdn = config.get('fqdn') + super(ConfigFQDNEnvironmentMixin, self).__init__( + config=config, + fqdn=fqdn, + **kw + ) + + +class ComputeFQDNEnvironmentMixin(FQDNEnvironmentMixin): + """Get the FQDN by calling socket.getfqdn().""" + + def __init__(self, **kw): + super(ComputeFQDNEnvironmentMixin, self).__init__( + fqdn=socket.getfqdn(), + **kw + ) + + +class PusherDomainEnvironmentMixin(ConfigEnvironmentMixin): + """Deduce pusher_email from pusher by appending an emaildomain.""" + + def __init__(self, **kw): + super(PusherDomainEnvironmentMixin, self).__init__(**kw) + self.__emaildomain = self.config.get('emaildomain') + + def get_pusher_email(self): + if self.__emaildomain: + # Derive the pusher's full email address in the default way: + return '%s@%s' % (self.get_pusher(), self.__emaildomain) + else: + return super(PusherDomainEnvironmentMixin, self).get_pusher_email() + + +class StaticRecipientsEnvironmentMixin(Environment): + """Set recipients statically based on constructor parameters.""" + + def __init__( + self, + refchange_recipients, announce_recipients, revision_recipients, + **kw + ): + super(StaticRecipientsEnvironmentMixin, self).__init__(**kw) + + # The recipients for various types of notification emails, as + # RFC 2822 email addresses separated by commas (or the empty + # string if no recipients are configured). Although there is + # a mechanism to choose the recipient lists based on on the + # actual *contents* of the change being reported, we only + # choose based on the *type* of the change. Therefore we can + # compute them once and for all: + if not (refchange_recipients + or announce_recipients + or revision_recipients): + raise ConfigurationException('No email recipients configured!') + self.__refchange_recipients = refchange_recipients + self.__announce_recipients = announce_recipients + self.__revision_recipients = revision_recipients + + def get_refchange_recipients(self, refchange): + return self.__refchange_recipients + + def get_announce_recipients(self, annotated_tag_change): + return self.__announce_recipients + + def get_revision_recipients(self, revision): + return self.__revision_recipients + + +class ConfigRecipientsEnvironmentMixin( + ConfigEnvironmentMixin, + StaticRecipientsEnvironmentMixin + ): + """Determine recipients statically based on config.""" + + def __init__(self, config, **kw): + super(ConfigRecipientsEnvironmentMixin, self).__init__( + config=config, + refchange_recipients=self._get_recipients( + config, 'refchangelist', 'mailinglist', + ), + announce_recipients=self._get_recipients( + config, 'announcelist', 'refchangelist', 'mailinglist', + ), + revision_recipients=self._get_recipients( + config, 'commitlist', 'mailinglist', + ), + **kw + ) + + def _get_recipients(self, config, *names): + """Return the recipients for a particular type of message. + + Return the list of email addresses to which a particular type + of notification email should be sent, by looking at the config + value for "multimailhook.$name" for each of names. Use the + value from the first name that is configured. The return + value is a (possibly empty) string containing RFC 2822 email + addresses separated by commas. If no configuration could be + found, raise a ConfigurationException.""" + + for name in names: + retval = config.get_recipients(name) + if retval is not None: + return retval + else: + return '' + + +class ProjectdescEnvironmentMixin(Environment): + """Make a "projectdesc" value available for templates. + + By default, it is set to the first line of $GIT_DIR/description + (if that file is present and appears to be set meaningfully).""" + + def __init__(self, **kw): + super(ProjectdescEnvironmentMixin, self).__init__(**kw) + self.COMPUTED_KEYS += ['projectdesc'] + + def get_projectdesc(self): + """Return a one-line descripition of the project.""" + + git_dir = get_git_dir() + try: + projectdesc = open(os.path.join(git_dir, 'description')).readline().strip() + if projectdesc and not projectdesc.startswith('Unnamed repository'): + return projectdesc + except IOError: + pass + + return 'UNNAMED PROJECT' + + +class GenericEnvironmentMixin(Environment): + def get_pusher(self): + return self.osenv.get('USER', 'unknown user') + + +class GenericEnvironment( + ProjectdescEnvironmentMixin, + ConfigMaxlinesEnvironmentMixin, + ComputeFQDNEnvironmentMixin, + ConfigFilterLinesEnvironmentMixin, + ConfigRecipientsEnvironmentMixin, + PusherDomainEnvironmentMixin, + ConfigOptionsEnvironmentMixin, + GenericEnvironmentMixin, + Environment, + ): + pass + + +class GitoliteEnvironmentMixin(Environment): + def get_repo_shortname(self): + # The gitolite environment variable $GL_REPO is a pretty good + # repo_shortname (though it's probably not as good as a value + # the user might have explicitly put in his config). + return ( + self.osenv.get('GL_REPO', None) + or super(GitoliteEnvironmentMixin, self).get_repo_shortname() + ) + + def get_pusher(self): + return self.osenv.get('GL_USER', 'unknown user') + + +class IncrementalDateTime(object): + """Simple wrapper to give incremental date/times. + + Each call will result in a date/time a second later than the + previous call. This can be used to falsify email headers, to + increase the likelihood that email clients sort the emails + correctly.""" + + def __init__(self): + self.time = time.time() + + def next(self): + formatted = formatdate(self.time, True) + self.time += 1 + return formatted + + +class GitoliteEnvironment( + ProjectdescEnvironmentMixin, + ConfigMaxlinesEnvironmentMixin, + ComputeFQDNEnvironmentMixin, + ConfigFilterLinesEnvironmentMixin, + ConfigRecipientsEnvironmentMixin, + PusherDomainEnvironmentMixin, + ConfigOptionsEnvironmentMixin, + GitoliteEnvironmentMixin, + Environment, + ): + pass + + +class Push(object): + """Represent an entire push (i.e., a group of ReferenceChanges). + + It is easy to figure out what commits were added to a *branch* by + a Reference change: + + git rev-list change.old..change.new + + or removed from a *branch*: + + git rev-list change.new..change.old + + But it is not quite so trivial to determine which entirely new + commits were added to the *repository* by a push and which old + commits were discarded by a push. A big part of the job of this + class is to figure out these things, and to make sure that new + commits are only detailed once even if they were added to multiple + references. + + The first step is to determine the "other" references--those + unaffected by the current push. They are computed by + Push._compute_other_ref_sha1s() by listing all references then + removing any affected by this push. + + The commits contained in the repository before this push were + + git rev-list other1 other2 other3 ... change1.old change2.old ... + + Where "changeN.old" is the old value of one of the references + affected by this push. + + The commits contained in the repository after this push are + + git rev-list other1 other2 other3 ... change1.new change2.new ... + + The commits added by this push are the difference between these + two sets, which can be written + + git rev-list \ + ^other1 ^other2 ... \ + ^change1.old ^change2.old ... \ + change1.new change2.new ... + + The commits removed by this push can be computed by + + git rev-list \ + ^other1 ^other2 ... \ + ^change1.new ^change2.new ... \ + change1.old change2.old ... + + The last point is that it is possible that other pushes are + occurring simultaneously to this one, so reference values can + change at any time. It is impossible to eliminate all race + conditions, but we reduce the window of time during which problems + can occur by translating reference names to SHA1s as soon as + possible and working with SHA1s thereafter (because SHA1s are + immutable).""" + + # A map {(changeclass, changetype) : integer} specifying the order + # that reference changes will be processed if multiple reference + # changes are included in a single push. The order is significant + # mostly because new commit notifications are threaded together + # with the first reference change that includes the commit. The + # following order thus causes commits to be grouped with branch + # changes (as opposed to tag changes) if possible. + SORT_ORDER = dict( + (value, i) for (i, value) in enumerate([ + (BranchChange, 'update'), + (BranchChange, 'create'), + (AnnotatedTagChange, 'update'), + (AnnotatedTagChange, 'create'), + (NonAnnotatedTagChange, 'update'), + (NonAnnotatedTagChange, 'create'), + (BranchChange, 'delete'), + (AnnotatedTagChange, 'delete'), + (NonAnnotatedTagChange, 'delete'), + (OtherReferenceChange, 'update'), + (OtherReferenceChange, 'create'), + (OtherReferenceChange, 'delete'), + ]) + ) + + def __init__(self, changes): + self.changes = sorted(changes, key=self._sort_key) + + # The SHA-1s of commits referred to by references unaffected + # by this push: + other_ref_sha1s = self._compute_other_ref_sha1s() + + self._old_rev_exclusion_spec = self._compute_rev_exclusion_spec( + other_ref_sha1s.union( + change.old.sha1 + for change in self.changes + if change.old.type in ['commit', 'tag'] + ) + ) + self._new_rev_exclusion_spec = self._compute_rev_exclusion_spec( + other_ref_sha1s.union( + change.new.sha1 + for change in self.changes + if change.new.type in ['commit', 'tag'] + ) + ) + + @classmethod + def _sort_key(klass, change): + return (klass.SORT_ORDER[change.__class__, change.change_type], change.refname,) + + def _compute_other_ref_sha1s(self): + """Return the GitObjects referred to by references unaffected by this push.""" + + # The refnames being changed by this push: + updated_refs = set( + change.refname + for change in self.changes + ) + + # The SHA-1s of commits referred to by all references in this + # repository *except* updated_refs: + sha1s = set() + fmt = ( + '%(objectname) %(objecttype) %(refname)\n' + '%(*objectname) %(*objecttype) %(refname)' + ) + for line in read_git_lines(['for-each-ref', '--format=%s' % (fmt,)]): + (sha1, type, name) = line.split(' ', 2) + if sha1 and type == 'commit' and name not in updated_refs: + sha1s.add(sha1) + + return sha1s + + def _compute_rev_exclusion_spec(self, sha1s): + """Return an exclusion specification for 'git rev-list'. + + git_objects is an iterable over GitObject instances. Return a + string that can be passed to the standard input of 'git + rev-list --stdin' to exclude all of the commits referred to by + git_objects.""" + + return ''.join( + ['^%s\n' % (sha1,) for sha1 in sorted(sha1s)] + ) + + def get_new_commits(self, reference_change=None): + """Return a list of commits added by this push. + + Return a list of the object names of commits that were added + by the part of this push represented by reference_change. If + reference_change is None, then return a list of *all* commits + added by this push.""" + + if not reference_change: + new_revs = sorted( + change.new.sha1 + for change in self.changes + if change.new + ) + elif not reference_change.new.commit_sha1: + return [] + else: + new_revs = [reference_change.new.commit_sha1] + + cmd = ['rev-list', '--stdin'] + new_revs + return read_git_lines(cmd, input=self._old_rev_exclusion_spec) + + def get_discarded_commits(self, reference_change): + """Return a list of commits discarded by this push. + + Return a list of the object names of commits that were + entirely discarded from the repository by the part of this + push represented by reference_change.""" + + if not reference_change.old.commit_sha1: + return [] + else: + old_revs = [reference_change.old.commit_sha1] + + cmd = ['rev-list', '--stdin'] + old_revs + return read_git_lines(cmd, input=self._new_rev_exclusion_spec) + + def send_emails(self, mailer, body_filter=None): + """Use send all of the notification emails needed for this push. + + Use send all of the notification emails (including reference + change emails and commit emails) needed for this push. Send + the emails using mailer. If body_filter is not None, then use + it to filter the lines that are intended for the email + body.""" + + # The sha1s of commits that were introduced by this push. + # They will be removed from this set as they are processed, to + # guarantee that one (and only one) email is generated for + # each new commit. + unhandled_sha1s = set(self.get_new_commits()) + send_date = IncrementalDateTime() + for change in self.changes: + # Check if we've got anyone to send to + if not change.recipients: + sys.stderr.write( + '*** no recipients configured so no email will be sent\n' + '*** for %r update %s->%s\n' + % (change.refname, change.old.sha1, change.new.sha1,) + ) + else: + sys.stderr.write('Sending notification emails to: %s\n' % (change.recipients,)) + extra_values = {'send_date' : send_date.next()} + mailer.send( + change.generate_email(self, body_filter, extra_values), + change.recipients, + ) + + sha1s = [] + for sha1 in reversed(list(self.get_new_commits(change))): + if sha1 in unhandled_sha1s: + sha1s.append(sha1) + unhandled_sha1s.remove(sha1) + + max_emails = change.environment.maxcommitemails + if max_emails and len(sha1s) > max_emails: + sys.stderr.write( + '*** Too many new commits (%d), not sending commit emails.\n' % len(sha1s) + + '*** Try setting multimailhook.maxCommitEmails to a greater value\n' + + '*** Currently, multimailhook.maxCommitEmails=%d\n' % max_emails + ) + return + + for (num, sha1) in enumerate(sha1s): + rev = Revision(change, GitObject(sha1), num=num+1, tot=len(sha1s)) + if rev.recipients: + extra_values = {'send_date' : send_date.next()} + mailer.send( + rev.generate_email(self, body_filter, extra_values), + rev.recipients, + ) + + # Consistency check: + if unhandled_sha1s: + sys.stderr.write( + 'ERROR: No emails were sent for the following new commits:\n' + ' %s\n' + % ('\n '.join(sorted(unhandled_sha1s)),) + ) + + +def run_as_post_receive_hook(environment, mailer): + changes = [] + for line in sys.stdin: + (oldrev, newrev, refname) = line.strip().split(' ', 2) + changes.append( + ReferenceChange.create(environment, oldrev, newrev, refname) + ) + push = Push(changes) + push.send_emails(mailer, body_filter=environment.filter_body) + + +def run_as_update_hook(environment, mailer, refname, oldrev, newrev): + changes = [ + ReferenceChange.create( + environment, + read_git_output(['rev-parse', '--verify', oldrev]), + read_git_output(['rev-parse', '--verify', newrev]), + refname, + ), + ] + push = Push(changes) + push.send_emails(mailer, body_filter=environment.filter_body) + + +def choose_mailer(config, environment): + mailer = config.get('mailer', default='sendmail') + + if mailer == 'smtp': + smtpserver = config.get('smtpserver', default='localhost') + mailer = SMTPMailer( + envelopesender=(environment.get_sender() or environment.get_fromaddr()), + smtpserver=smtpserver, + ) + elif mailer == 'sendmail': + command = config.get('sendmailcommand') + if command: + command = shlex.split(command) + mailer = SendMailer(command=command, envelopesender=environment.get_sender()) + else: + sys.stderr.write( + 'fatal: multimailhook.mailer is set to an incorrect value: "%s"\n' % mailer + + 'please use one of "smtp" or "sendmail".\n' + ) + sys.exit(1) + return mailer + + +KNOWN_ENVIRONMENTS = { + 'generic' : GenericEnvironmentMixin, + 'gitolite' : GitoliteEnvironmentMixin, + } + + +def choose_environment(config, osenv=None, env=None, recipients=None): + if not osenv: + osenv = os.environ + + environment_mixins = [ + ProjectdescEnvironmentMixin, + ConfigMaxlinesEnvironmentMixin, + ComputeFQDNEnvironmentMixin, + ConfigFilterLinesEnvironmentMixin, + PusherDomainEnvironmentMixin, + ConfigOptionsEnvironmentMixin, + ] + environment_kw = { + 'osenv' : osenv, + 'config' : config, + } + + if not env: + env = config.get('environment') + + if not env: + if 'GL_USER' in osenv and 'GL_REPO' in osenv: + env = 'gitolite' + else: + env = 'generic' + + environment_mixins.append(KNOWN_ENVIRONMENTS[env]) + + if recipients: + environment_mixins.insert(0, StaticRecipientsEnvironmentMixin) + environment_kw['refchange_recipients'] = recipients + environment_kw['announce_recipients'] = recipients + environment_kw['revision_recipients'] = recipients + else: + environment_mixins.insert(0, ConfigRecipientsEnvironmentMixin) + + environment_klass = type( + 'EffectiveEnvironment', + tuple(environment_mixins) + (Environment,), + {}, + ) + return environment_klass(**environment_kw) + + +def main(args): + parser = optparse.OptionParser( + description=__doc__, + usage='%prog [OPTIONS]\n or: %prog [OPTIONS] REFNAME OLDREV NEWREV', + ) + + parser.add_option( + '--environment', '--env', action='store', type='choice', + choices=['generic', 'gitolite'], default=None, + help=( + 'Choose type of environment is in use. Default is taken from ' + 'multimailhook.environment if set; otherwise "generic".' + ), + ) + parser.add_option( + '--stdout', action='store_true', default=False, + help='Output emails to stdout rather than sending them.', + ) + parser.add_option( + '--recipients', action='store', default=None, + help='Set list of email recipients for all types of emails.', + ) + parser.add_option( + '--show-env', action='store_true', default=False, + help=( + 'Write to stderr the values determined for the environment ' + '(intended for debugging purposes).' + ), + ) + + (options, args) = parser.parse_args(args) + + config = Config('multimailhook') + + try: + environment = choose_environment( + config, osenv=os.environ, + env=options.environment, + recipients=options.recipients, + ) + + if options.show_env: + sys.stderr.write('Environment values:\n') + for (k,v) in sorted(environment.get_values().items()): + sys.stderr.write(' %s : %r\n' % (k,v)) + sys.stderr.write('\n') + + if options.stdout: + mailer = OutputMailer(sys.stdout) + else: + mailer = choose_mailer(config, environment) + + # Dual mode: if arguments were specified on the command line, run + # like an update hook; otherwise, run as a post-receive hook. + if args: + if len(args) != 3: + parser.error('Need zero or three non-option arguments') + (refname, oldrev, newrev) = args + run_as_update_hook(environment, mailer, refname, oldrev, newrev) + else: + run_as_post_receive_hook(environment, mailer) + except ConfigurationException, e: + sys.exit(str(e)) + + +if __name__ == '__main__': + main(sys.argv[1:]) |