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import sys, os, time
from cPickle import dump
from zope.interface import implements
from twisted.python import log
from twisted.internet import defer
from twisted.application import service
from twisted.web import html
from buildbot import interfaces, util
html_tmpl = """
<p>Changed by: <b>%(who)s</b><br />
Changed at: <b>%(at)s</b><br />
%(branch)s
%(revision)s
<br />
Changed files:
%(files)s
Comments:
%(comments)s
</p>
"""
class Change:
"""I represent a single change to the source tree. This may involve
several files, but they are all changed by the same person, and there is
a change comment for the group as a whole.
If the version control system supports sequential repository- (or
branch-) wide change numbers (like SVN, P4, and Arch), then revision=
should be set to that number. The highest such number will be used at
checkout time to get the correct set of files.
If it does not (like CVS), when= should be set to the timestamp (seconds
since epoch, as returned by time.time()) when the change was made. when=
will be filled in for you (to the current time) if you omit it, which is
suitable for ChangeSources which have no way of getting more accurate
timestamps.
Changes should be submitted to ChangeMaster.addChange() in
chronologically increasing order. Out-of-order changes will probably
cause the html.Waterfall display to be corrupted."""
implements(interfaces.IStatusEvent)
number = None
links = []
branch = None
revision = None # used to create a source-stamp
def __init__(self, who, files, comments, isdir=0, links=[],
revision=None, when=None, branch=None, category=None):
self.who = who
self.comments = comments
self.isdir = isdir
self.links = links
self.revision = revision
if when is None:
when = util.now()
self.when = when
self.branch = branch
self.category = category
# keep a sorted list of the files, for easier display
self.files = files[:]
self.files.sort()
def asText(self):
data = ""
data += self.getFileContents()
data += "At: %s\n" % self.getTime()
data += "Changed By: %s\n" % self.who
data += "Comments: %s\n\n" % self.comments
return data
def asHTML(self):
links = []
for file in self.files:
link = filter(lambda s: s.find(file) != -1, self.links)
if len(link) == 1:
# could get confused
links.append('<a href="%s"><b>%s</b></a>' % (link[0], file))
else:
links.append('<b>%s</b>' % file)
revision = ""
if self.revision:
revision = "Revision: <b>%s</b><br />\n" % self.revision
branch = ""
if self.branch:
branch = "Branch: <b>%s</b><br />\n" % self.branch
kwargs = { 'who' : html.escape(self.who),
'at' : self.getTime(),
'files' : html.UL(links) + '\n',
'revision': revision,
'branch' : branch,
'comments': html.PRE(self.comments) }
return html_tmpl % kwargs
def get_HTML_box(self, url):
"""Return the contents of a TD cell for the waterfall display.
@param url: the URL that points to an HTML page that will render
using our asHTML method. The Change is free to use this or ignore it
as it pleases.
@return: the HTML that will be put inside the table cell. Typically
this is just a single href named after the author of the change and
pointing at the passed-in 'url'.
"""
who = self.getShortAuthor()
if self.comments is None:
title = ""
else:
title = html.escape(self.comments)
return '<a href="%s" title="%s">%s</a>' % (url,
title,
html.escape(who))
def getShortAuthor(self):
return self.who
def getTime(self):
if not self.when:
return "?"
return time.strftime("%a %d %b %Y %H:%M:%S",
time.localtime(self.when))
def getTimes(self):
return (self.when, None)
def getText(self):
return [html.escape(self.who)]
def getLogs(self):
return {}
def getFileContents(self):
data = ""
if len(self.files) == 1:
if self.isdir:
data += "Directory: %s\n" % self.files[0]
else:
data += "File: %s\n" % self.files[0]
else:
data += "Files:\n"
for f in self.files:
data += " %s\n" % f
return data
class ChangeMaster(service.MultiService):
"""This is the master-side service which receives file change
notifications from CVS. It keeps a log of these changes, enough to
provide for the HTML waterfall display, and to tell
temporarily-disconnected bots what they missed while they were
offline.
Change notifications come from two different kinds of sources. The first
is a PB service (servicename='changemaster', perspectivename='change'),
which provides a remote method called 'addChange', which should be
called with a dict that has keys 'filename' and 'comments'.
The second is a list of objects derived from the ChangeSource class.
These are added with .addSource(), which also sets the .changemaster
attribute in the source to point at the ChangeMaster. When the
application begins, these will be started with .start() . At shutdown
time, they will be terminated with .stop() . They must be persistable.
They are expected to call self.changemaster.addChange() with Change
objects.
There are several different variants of the second type of source:
- L{buildbot.changes.mail.MaildirSource} watches a maildir for CVS
commit mail. It uses DNotify if available, or polls every 10
seconds if not. It parses incoming mail to determine what files
were changed.
- L{buildbot.changes.freshcvs.FreshCVSSource} makes a PB
connection to the CVSToys 'freshcvs' daemon and relays any
changes it announces.
"""
implements(interfaces.IEventSource)
debug = False
# todo: use Maildir class to watch for changes arriving by mail
def __init__(self):
service.MultiService.__init__(self)
self.changes = []
# self.basedir must be filled in by the parent
self.nextNumber = 1
def addSource(self, source):
assert interfaces.IChangeSource.providedBy(source)
assert service.IService.providedBy(source)
if self.debug:
print "ChangeMaster.addSource", source
source.setServiceParent(self)
def removeSource(self, source):
assert source in self
if self.debug:
print "ChangeMaster.removeSource", source, source.parent
d = defer.maybeDeferred(source.disownServiceParent)
return d
def addChange(self, change):
"""Deliver a file change event. The event should be a Change object.
This method will timestamp the object as it is received."""
log.msg("adding change, who %s, %d files, rev=%s, branch=%s, "
"comments %s, category %s" % (change.who, len(change.files),
change.revision, change.branch,
change.comments, change.category))
change.number = self.nextNumber
self.nextNumber += 1
self.changes.append(change)
self.parent.addChange(change)
# TODO: call pruneChanges after a while
def pruneChanges(self):
self.changes = self.changes[-100:] # or something
def eventGenerator(self, branches=[]):
for i in range(len(self.changes)-1, -1, -1):
c = self.changes[i]
if not branches or c.branch in branches:
yield c
def getChangeNumbered(self, num):
if not self.changes:
return None
first = self.changes[0].number
if first + len(self.changes)-1 != self.changes[-1].number:
log.msg(self,
"lost a change somewhere: [0] is %d, [%d] is %d" % \
(self.changes[0].number,
len(self.changes) - 1,
self.changes[-1].number))
for c in self.changes:
log.msg("c[%d]: " % c.number, c)
return None
offset = num - first
log.msg(self, "offset", offset)
return self.changes[offset]
def __getstate__(self):
d = service.MultiService.__getstate__(self)
del d['parent']
del d['services'] # lose all children
del d['namedServices']
return d
def __setstate__(self, d):
self.__dict__ = d
# self.basedir must be set by the parent
self.services = [] # they'll be repopulated by readConfig
self.namedServices = {}
def saveYourself(self):
filename = os.path.join(self.basedir, "changes.pck")
tmpfilename = filename + ".tmp"
try:
dump(self, open(tmpfilename, "wb"))
if sys.platform == 'win32':
# windows cannot rename a file on top of an existing one
if os.path.exists(filename):
os.unlink(filename)
os.rename(tmpfilename, filename)
except Exception, e:
log.msg("unable to save changes")
log.err()
def stopService(self):
self.saveYourself()
return service.MultiService.stopService(self)
class TestChangeMaster(ChangeMaster):
"""A ChangeMaster for use in tests that does not save itself"""
def stopService(self):
return service.MultiService.stopService(self)
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