script/land.py

   1 #!/usr/bin/env python
   2 # run tests on all Samba subprojects and push to a git tree on success
   3 # Copyright Andrew Tridgell 2010
   4 # Copyright Jelmer Vernooij 2010
   5 # released under GNU GPL v3 or later
   6
   7 from cStringIO import StringIO
   8 import fcntl
   9 from subprocess import call, check_call, Popen, PIPE
  10 import os, tarfile, sys, time
  11 from optparse import OptionParser
  12 import smtplib
  13 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "../selftest"))
  14 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "../lib/testtools"))
  15 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "../lib/subunit/python"))
  16 import subunit
  17 import testtools
  18 import subunithelper
  19 import tempfile
  20 from email.mime.application import MIMEApplication
  21 from email.mime.text import MIMEText
  22 from email.mime.multipart import MIMEMultipart
  23
  24 samba_master = os.getenv('SAMBA_MASTER', 'git://git.samba.org/samba.git')
  25 samba_master_ssh = os.getenv('SAMBA_MASTER_SSH', 'git+ssh://git.samba.org/data/git/samba.git')
  26
  27 cleanup_list = []
  28
  29 os.environ['CC'] = "ccache gcc"
  30
  31 tasks = {
  32     "source3" : [ ("autogen", "./autogen.sh", "text/plain"),
  33                   ("configure", "./configure.developer ${PREFIX}", "text/plain"),
  34                   ("make basics", "make basics", "text/plain"),
  35                   ("make", "make -j 4 everything", "text/plain"), # don't use too many processes
  36                   ("install", "make install", "text/plain"),
  37                   ("test", "TDB_NO_FSYNC=1 make subunit-test", "text/x-subunit") ],
  38
  39     "source4" : [ ("configure", "./configure.developer ${PREFIX}", "text/plain"),
  40                   ("make", "make -j", "text/plain"),
  41                   ("install", "make install", "text/plain"),
  42                   ("test", "TDB_NO_FSYNC=1 make subunit-test", "text/x-subunit") ],
  43
  44     "lib/ldb" : [ ("configure", "./configure --enable-developer -C ${PREFIX}", "text/plain"),
  45                           ("make", "make -j", "text/plain"),
  46                           ("install", "make install", "text/plain"),
  47                           ("test", "make test", "text/plain") ],
  48
  49     "lib/tdb" : [ ("autogen", "./autogen-waf.sh", "text/plain"),
  50                   ("configure", "./configure --enable-developer -C ${PREFIX}", "text/plain"),
  51                   ("make", "make -j", "text/plain"),
  52                   ("install", "make install", "text/plain"),
  53                   ("test", "make test", "text/plain") ],
  54
  55     "lib/talloc" : [ ("autogen", "./autogen-waf.sh", "text/plain"),
  56                      ("configure", "./configure --enable-developer -C ${PREFIX}", "text/plain"),
  57                      ("make", "make -j", "text/plain"),
  58                      ("install", "make install", "text/plain"),
  59                      ("test", "make test", "text/x-subunit"), ],
  60
  61     "lib/replace" : [ ("autogen", "./autogen-waf.sh", "text/plain"),
  62                       ("configure", "./configure --enable-developer -C ${PREFIX}", "text/plain"),
  63                       ("make", "make -j", "text/plain"),
  64                       ("install", "make install", "text/plain"),
  65                       ("test", "make test", "text/plain"), ],
  66
  67     "lib/tevent" : [ ("configure", "./configure --enable-developer -C ${PREFIX}", "text/plain"),
  68                      ("make", "make -j", "text/plain"),
  69                      ("install", "make install", "text/plain"),
  70                      ("test", "make test", "text/plain"), ],
  71 }
  72
  73
  74 def run_cmd(cmd, dir=None, show=None, output=False, checkfail=True, shell=False):
  75     if show is None:
  76         show = options.verbose
  77     if show:
  78         print("Running: '%s' in '%s'" % (cmd, dir))
  79     if output:
  80         return Popen(cmd, stdout=PIPE, cwd=dir, shell=shell).communicate()[0]
  81     elif checkfail:
  82         return check_call(cmd, cwd=dir, shell=shell)
  83     else:
  84         return call(cmd, cwd=dir, shell=shell)
  85
  86
  87 def clone_gitroot(test_master, revision="HEAD"):
  88     run_cmd(["git", "clone", "--shared", gitroot, test_master])
  89     if revision != "HEAD":
  90         run_cmd(["git", "checkout", revision])
  91
  92
  93 class RetryChecker(object):
  94     """Check whether it is necessary to retry."""
  95
  96     def __init__(self, dir):
  97         run_cmd(["git", "remote", "add", "-t", "master", "master", samba_master])
  98         run_cmd(["git", "fetch", "master"])
  99         cmd = '''set -e
 100                 while :; do
 101                   sleep 60
 102                   git describe master/master > old_master.desc
 103                   git fetch master
 104                   git describe master/master > master.desc
 105                   diff old_master.desc master.desc
 106                 done
 107                '''
 108         self.proc = Popen(cmd, shell=True, cwd=self.dir)
 109
 110     def poll(self):
 111         return self.proc.poll()
 112
 113     def kill(self):
 114         self.proc.terminate()
 115         self.proc.wait()
 116         self.retry.proc = None
 117
 118
 119 class TreeStageBuilder(object):
 120     """Handle building of a particular stage for a tree.
 121     """
 122
 123     def __init__(self, tree, name, command, fail_quickly=False):
 124         self.tree = tree
 125         self.name = name
 126         self.command = command
 127         self.fail_quickly = fail_quickly
 128         self.exitcode = None
 129         self.stdin = open(os.devnull, 'r')
 130
 131     def start(self):
 132         raise NotImplementedError(self.start)
 133
 134     def poll(self):
 135         self.exitcode = self.proc.poll()
 136         return self.exitcode
 137
 138     def kill(self):
 139         if self.proc is not None:
 140             try:
 141                 run_cmd(["killbysubdir", self.tree.sdir], checkfail=False)
 142             except OSError:
 143                 # killbysubdir doesn't exist ?
 144                 pass
 145             self.proc.terminate()
 146             self.proc.wait()
 147             self.proc = None
 148
 149     @property
 150     def failure_reason(self):
 151         raise NotImplementedError(self.failure_reason)
 152
 153     @property
 154     def failed(self):
 155         return (self.exitcode != 0)
 156
 157
 158 class PlainTreeStageBuilder(TreeStageBuilder):
 159
 160     def start(self):
 161         print '%s: [%s] Running %s' % (self.name, self.name, self.command)
 162         self.proc = Popen(self.command, shell=True, cwd=self.tree.dir,
 163                           stdout=self.tree.stdout, stderr=self.tree.stderr,
 164                           stdin=self.stdin)
 165
 166     @property
 167     def failure_reason(self):
 168         return "failed '%s' with exit code %d" % (self.command, self.exitcode)
 169
 170
 171 class AbortingTestResult(subunithelper.TestsuiteEnabledTestResult):
 172
 173     def __init__(self, stage):
 174         super(AbortingTestResult, self).__init__()
 175         self.stage = stage
 176
 177     def addError(self, test, details=None):
 178         self.stage.proc.terminate()
 179
 180     def addFailure(self, test, details=None):
 181         self.stage.proc.terminate()
 182
 183
 184 class FailureTrackingTestResult(subunithelper.TestsuiteEnabledTestResult):
 185
 186     def __init__(self, stage):
 187         super(FailureTrackingTestResult, self).__init__()
 188         self.stage = stage
 189
 190     def addError(self, test, details=None):
 191         if self.stage.failed_test is None:
 192             self.stage.failed_test = ("error", test)
 193
 194     def addFailure(self, test, details=None):
 195         if self.stage.failed_test is None:
 196             self.stage.failed_test = ("failure", test)
 197
 198
 199 class SubunitTreeStageBuilder(TreeStageBuilder):
 200
 201     def __init__(self, tree, name, command, fail_quickly=False):
 202         super(SubunitTreeStageBuilder, self).__init__(tree, name, command,
 203                 fail_quickly)
 204         self.failed_test = None
 205         self.subunit_path = os.path.join(gitroot,
 206             "%s.%s.subunit" % (self.tree.tag, self.name))
 207         self.tree.logfiles.append(
 208             (self.subunit_path, os.path.basename(self.subunit_path),
 209              "text/x-subunit"))
 210         self.subunit = open(self.subunit_path, 'w')
 211
 212         formatter = subunithelper.PlainFormatter(False, True, {})
 213         clients = [formatter, subunit.TestProtocolClient(self.subunit),
 214                    FailureTrackingTestResult(self)]
 215         if fail_quickly:
 216             clients.append(AbortingTestResult(self))
 217         self.subunit_server = subunit.TestProtocolServer(
 218             testtools.MultiTestResult(*clients),
 219             self.subunit)
 220         self.buffered = ""
 221
 222     def start(self):
 223         print '%s: [%s] Running' % (self.tree.name, self.name)
 224         self.proc = Popen(self.command, shell=True, cwd=self.tree.dir,
 225             stdout=PIPE, stderr=self.tree.stderr, stdin=self.stdin)
 226         fd = self.proc.stdout.fileno()
 227         fl = fcntl.fcntl(fd, fcntl.F_GETFL)
 228         fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK)
 229
 230     def poll(self):
 231         try:
 232             data = self.proc.stdout.read()
 233         except IOError:
 234             return None
 235         else:
 236             self.buffered += data
 237             buffered = ""
 238             for l in self.buffered.splitlines(True):
 239                 if l[-1] == "\n":
 240                     self.subunit_server.lineReceived(l)
 241                 else:
 242                     buffered += l
 243             self.buffered = buffered
 244             self.exitcode = self.proc.poll()
 245             if self.exitcode is not None:
 246                 self.subunit.close()
 247             return self.exitcode
 248
 249     @property
 250     def failure_reason(self):
 251         if self.failed_test:
 252             return "failed '%s' with %s in test %s" (self.command, self.failed_test[0], self.failed_test[1])
 253         else:
 254             return "failed '%s' with exit code %d in unknown test" % (self.command, self.exitcode)
 255
 256
 257 class TreeBuilder(object):
 258     '''handle build of one directory'''
 259
 260     def __init__(self, name, sequence, fail_quickly=False):
 261         self.name = name
 262         self.fail_quickly = fail_quickly
 263
 264         self.tag = self.name.replace('/', '_')
 265         self.sequence = sequence
 266         self.next = 0
 267         self.stages = []
 268         self.stdout_path = os.path.join(gitroot, "%s.stdout" % (self.tag, ))
 269         self.stderr_path = os.path.join(gitroot, "%s.stderr" % (self.tag, ))
 270         self.logfiles = [
 271             (self.stdout_path, os.path.basename(self.stdout_path), "text/plain"),
 272             (self.stderr_path, os.path.basename(self.stderr_path), "text/plain"),
 273             ]
 274         if options.verbose:
 275             print("stdout for %s in %s" % (self.name, self.stdout_path))
 276             print("stderr for %s in %s" % (self.name, self.stderr_path))
 277         if os.path.exists(self.stdout_path):
 278             os.unlink(self.stdout_path)
 279         if os.path.exists(self.stderr_path):
 280             os.unlink(self.stderr_path)
 281         self.stdout = open(self.stdout_path, 'w')
 282         self.stderr = open(self.stderr_path, 'w')
 283         self.sdir = os.path.join(testbase, self.tag)
 284         if name in ['pass', 'fail', 'retry']:
 285             self.dir = self.sdir
 286         else:
 287             self.dir = os.path.join(self.sdir, self.name)
 288         self.prefix = os.path.join(testbase, "prefix", self.tag)
 289         run_cmd(["rm", "-rf", self.sdir])
 290         cleanup_list.append(self.sdir)
 291         cleanup_list.append(self.prefix)
 292         os.makedirs(self.sdir)
 293         run_cmd(["rm",  "-rf", self.sdir])
 294         clone_gitroot(self.sdir, revision)
 295         self.start_next()
 296         self.exitcode = None
 297
 298     def start_next(self):
 299         if self.next == len(self.sequence):
 300             print '%s: Completed OK' % self.name
 301             self.done = True
 302             self.stdout.close()
 303             self.stderr.close()
 304             return
 305         (stage_name, cmd, output_mime_type) = self.sequence[self.next]
 306         cmd = cmd.replace("${PREFIX}", "--prefix=%s" % self.prefix)
 307         if output_mime_type == "text/plain":
 308             self.current_stage = PlainTreeStageBuilder(self, stage_name, cmd,
 309                 self.fail_quickly)
 310         elif output_mime_type == "text/x-subunit":
 311             self.current_stage = SubunitTreeStageBuilder(self, stage_name, cmd,
 312                 self.fail_quickly)
 313         else:
 314             raise Exception("Unknown output mime type %s" % output_mime_type)
 315         self.stages.append(self.current_stage)
 316         self.current_stage.start()
 317         self.next += 1
 318
 319     def remove_logs(self):
 320         for path, name, mime_type in self.logfiles:
 321             os.unlink(path)
 322
 323     def poll(self):
 324         self.exitcode = self.current_stage.poll()
 325         if self.exitcode is not None:
 326             self.current_stage = None
 327         return self.exitcode
 328
 329     def kill(self):
 330         if self.current_stage is not None:
 331             self.current_stage.kill()
 332             self.current_stage = None
 333
 334     @property
 335     def failed(self):
 336         return any([s.failed for s in self.stages])
 337
 338     @property
 339     def failed_stage(self):
 340         for s in self.stages:
 341             if s.failed:
 342                 return s
 343         return s
 344
 345     @property
 346     def failure_reason(self):
 347         return "%s: [%s] %s" % (self.name, self.failed_stage.name,
 348             self.failed_stage.failure_reason)
 349
 350
 351 class BuildList(object):
 352     '''handle build of multiple directories'''
 353
 354     def __init__(self, tasklist, tasknames):
 355         global tasks
 356         self.tlist = []
 357         self.tail_proc = None
 358         self.retry = None
 359         if tasknames == ['pass']:
 360             tasks = { 'pass' : [ ("pass", '/bin/true', "text/plain") ]}
 361         if tasknames == ['fail']:
 362             tasks = { 'fail' : [ ("fail", '/bin/false', "text/plain") ]}
 363         if tasknames == []:
 364             tasknames = tasklist
 365         for n in tasknames:
 366             b = TreeBuilder(n, tasks[n], not options.fail_slowly)
 367             self.tlist.append(b)
 368         if options.retry:
 369             self.retry = RetryChecker(self.sdir)
 370             self.need_retry = False
 371
 372     def kill_kids(self):
 373         if self.tail_proc is not None:
 374             self.tail_proc.terminate()
 375             self.tail_proc.wait()
 376             self.tail_proc = None
 377         if self.retry is not None:
 378             self.retry.kill()
 379         for b in self.tlist:
 380             b.kill()
 381
 382     def wait_one(self):
 383         while True:
 384             none_running = True
 385             for b in self.tlist:
 386                 if b.current_stage is None:
 387                     continue
 388                 none_running = False
 389                 if b.poll() is None:
 390                     continue
 391                 return b
 392             if options.retry:
 393                 ret = self.retry.poll()
 394                 if ret:
 395                     self.need_retry = True
 396                     self.retry = None
 397                     return None
 398             if none_running:
 399                 return None
 400             time.sleep(0.1)
 401
 402     def run(self):
 403         while True:
 404             b = self.wait_one()
 405             if options.retry and self.need_retry:
 406                 self.kill_kids()
 407                 print("retry needed")
 408                 return (0, None, None, None, "retry")
 409             if b is None:
 410                 break
 411             if b.failed:
 412                 self.kill_kids()
 413                 return (b.exitcode, b.name, b.failed_stage, b.tag, b.failure_reason)
 414             b.start_next()
 415         self.kill_kids()
 416         return (0, None, None, None, "All OK")
 417
 418     def tarlogs(self, name=None, fileobj=None):
 419         tar = tarfile.open(name=name, fileobj=fileobj, mode="w:gz")
 420         for b in self.tlist:
 421             for (path, name, mime_type) in b.logfiles:
 422                 tar.add(path, arcname=name)
 423         if os.path.exists("autobuild.log"):
 424             tar.add("autobuild.log")
 425         tar.close()
 426
 427     def attach_logs(self, outer):
 428         f = StringIO()
 429         self.tarlogs(fileobj=f)
 430         msg = MIMEApplication(f.getvalue(), "x-gzip")
 431         msg.add_header('Content-Disposition', 'attachment',
 432                        filename="logs.tar.gz")
 433         outer.attach(msg)
 434
 435     def remove_logs(self):
 436         for b in self.tlist:
 437             b.remove_logs()
 438
 439     def start_tail(self):
 440         cmd = "tail -f *.stdout *.stderr"
 441         self.tail_proc = Popen(cmd, shell=True, cwd=gitroot)
 442
 443
 444 def cleanup():
 445     if options.nocleanup:
 446         return
 447     print("Cleaning up ....")
 448     for d in cleanup_list:
 449         run_cmd(["rm", "-rf", d])
 450
 451
 452 def find_git_root(p):
 453     '''get to the top of the git repo'''
 454     while p != '/':
 455         if os.path.isdir(os.path.join(p, ".git")):
 456             return p
 457         p = os.path.abspath(os.path.join(p, '..'))
 458     return None
 459
 460
 461 def daemonize(logfile):
 462     pid = os.fork()
 463     if pid == 0: # Parent
 464         os.setsid()
 465         pid = os.fork()
 466         if pid != 0: # Actual daemon
 467             os._exit(0)
 468     else: # Grandparent
 469         os._exit(0)
 470
 471     import resource      # Resource usage information.
 472     maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
 473     if maxfd == resource.RLIM_INFINITY:
 474         maxfd = 1024 # Rough guess at maximum number of open file descriptors.
 475     for fd in range(0, maxfd):
 476         try:
 477             os.close(fd)
 478         except OSError:
 479             pass
 480     os.open(logfile, os.O_RDWR | os.O_CREAT)
 481     os.dup2(0, 1)
 482     os.dup2(0, 2)
 483
 484
 485 def rebase_tree(url):
 486     print("Rebasing on %s" % url)
 487     run_cmd(["git", "remote", "add", "-t", "master", "master", url], show=True,
 488             dir=test_master)
 489     run_cmd(["git", "fetch", "master"], show=True, dir=test_master)
 490     if options.fix_whitespace:
 491         run_cmd(["git", "rebase", "--whitespace=fix", "master/master"],
 492                 show=True, dir=test_master)
 493     else:
 494         run_cmd(["git", "rebase", "master/master"], show=True, dir=test_master)
 495     diff = run_cmd(["git", "--no-pager", "diff", "HEAD", "master/master"],
 496         dir=test_master, output=True)
 497     if diff == '':
 498         print("No differences between HEAD and master/master - exiting")
 499         sys.exit(0)
 500
 501 def push_to(url):
 502     print("Pushing to %s" % url)
 503     if options.mark:
 504         run_cmd("EDITOR=script/commit_mark.sh git commit --amend -c HEAD",
 505             dir=test_master, shell=True)
 506         # the notes method doesn't work yet, as metze hasn't allowed
 507         # refs/notes/* in master
 508         # run_cmd("EDITOR=script/commit_mark.sh git notes edit HEAD",
 509         #     dir=test_master)
 510     run_cmd(["git", "remote", "add", "-t", "master", "pushto", url], show=True,
 511         dir=test_master)
 512     run_cmd(["git", "push", "pushto", "+HEAD:master"], show=True,
 513         dir=test_master)
 514
 515 def_testbase = os.getenv("AUTOBUILD_TESTBASE")
 516 if def_testbase is None:
 517     if os.path.exists("/memdisk"):
 518         def_testbase = "/memdisk/%s" % os.getenv('USER')
 519     else:
 520         def_testbase = os.path.join(tempfile.gettempdir(), "autobuild-%s" % os.getenv("USER"))
 521
 522 parser = OptionParser()
 523 parser.add_option("--repository", help="repository to run tests for", default=None, type=str)
 524 parser.add_option("--revision", help="revision to compile if not HEAD", default=None, type=str)
 525 parser.add_option("--tail", help="show output while running", default=False, action="store_true")
 526 parser.add_option("--keeplogs", help="keep logs", default=False, action="store_true")
 527 parser.add_option("--nocleanup", help="don't remove test tree", default=False, action="store_true")
 528 parser.add_option("--testbase", help="base directory to run tests in (default %s)" % def_testbase,
 529                   default=def_testbase)
 530 parser.add_option("--passcmd", help="command to run on success", default=None)
 531 parser.add_option("--verbose", help="show all commands as they are run",
 532                   default=False, action="store_true")
 533 parser.add_option("--rebase", help="rebase on the given tree before testing",
 534                   default=None, type='str')
 535 parser.add_option("--rebase-master", help="rebase on %s before testing" % samba_master,
 536                   default=False, action='store_true')
 537 parser.add_option("--pushto", help="push to a git url on success",
 538                   default=None, type='str')
 539 parser.add_option("--push-master", help="push to %s on success" % samba_master_ssh,
 540                   default=False, action='store_true')
 541 parser.add_option("--mark", help="add a Tested-By signoff before pushing",
 542                   default=False, action="store_true")
 543 parser.add_option("--fix-whitespace", help="fix whitespace on rebase",
 544                   default=False, action="store_true")
 545 parser.add_option("--retry", help="automatically retry if master changes",
 546                   default=False, action="store_true")
 547 parser.add_option("--email", help="send email to the given address on failure",
 548                   type='str', default=None)
 549 parser.add_option("--always-email", help="always send email, even on success",
 550                   action="store_true")
 551 parser.add_option("--daemon", help="daemonize after initial setup",
 552                   action="store_true")
 553 parser.add_option("--fail-slowly", help="continue running tests even after one has already failed",
 554                   action="store_true")
 555
 556
 557 def email_failure(blist, exitcode, failed_task, failed_stage, failed_tag, errstr):
 558     '''send an email to options.email about the failure'''
 559     user = os.getenv("USER")
 560     text = '''
 561 Dear Developer,
 562
 563 Your autobuild failed when trying to test %s with the following error:
 564    %s
 565
 566 the autobuild has been abandoned. Please fix the error and resubmit.
 567
 568 You can see logs of the failed task here:
 569
 570   http://git.samba.org/%s/samba-autobuild/%s.stdout
 571   http://git.samba.org/%s/samba-autobuild/%s.stderr
 572
 573 A summary of the autobuild process is here:
 574
 575   http://git.samba.org/%s/samba-autobuild/autobuild.log
 576
 577 or you can get full logs of all tasks in this job here:
 578
 579   http://git.samba.org/%s/samba-autobuild/logs.tar.gz
 580
 581 The top commit for the tree that was built was:
 582
 583 %s
 584
 585 ''' % (failed_task, errstr, user, failed_tag, user, failed_tag, user, user,
 586        get_top_commit_msg(test_master))
 587
 588     msg = MIMEMultipart()
 589     msg['Subject'] = 'autobuild failure for task %s during %s' % (
 590         failed_task, failed_stage.name)
 591     msg['From'] = 'autobuild@samba.org'
 592     msg['To'] = options.email
 593
 594     main = MIMEText(text)
 595     msg.attach(main)
 596
 597     blist.attach_logs(msg)
 598
 599     s = smtplib.SMTP()
 600     s.connect()
 601     s.sendmail(msg['From'], [msg['To']], msg.as_string())
 602     s.quit()
 603
 604 def email_success(blist):
 605     '''send an email to options.email about a successful build'''
 606     user = os.getenv("USER")
 607     text = '''
 608 Dear Developer,
 609
 610 Your autobuild has succeeded.
 611
 612 '''
 613
 614     if options.keeplogs:
 615         text += '''
 616
 617 you can get full logs of all tasks in this job here:
 618
 619   http://git.samba.org/%s/samba-autobuild/logs.tar.gz
 620
 621 ''' % user
 622
 623     text += '''
 624 The top commit for the tree that was built was:
 625
 626 %s
 627 ''' % (get_top_commit_msg(test_master),)
 628
 629     msg = MIMEMultipart()
 630     msg['Subject'] = 'autobuild success'
 631     msg['From'] = 'autobuild@samba.org'
 632     msg['To'] = options.email
 633
 634     main = MIMEText(text, 'plain')
 635     msg.attach(main)
 636
 637     blist.attach_logs(msg)
 638
 639     s = smtplib.SMTP()
 640     s.connect()
 641     s.sendmail(msg['From'], [msg['To']], msg.as_string())
 642     s.quit()
 643
 644
 645 (options, args) = parser.parse_args()
 646
 647 if options.retry:
 648     if not options.rebase_master and options.rebase is None:
 649         raise Exception('You can only use --retry if you also rebase')
 650
 651 testbase = os.path.join(options.testbase, "b%u" % (os.getpid(),))
 652 test_master = os.path.join(testbase, "master")
 653
 654 if options.repository is not None:
 655     repository = options.repository
 656 else:
 657     repository = os.getcwd()
 658
 659 gitroot = find_git_root(repository)
 660 if gitroot is None:
 661     raise Exception("Failed to find git root under %s" % repository)
 662
 663 # get the top commit message, for emails
 664 if options.revision is not None:
 665     revision = options.revision
 666 else:
 667     revision = "HEAD"
 668
 669 def get_top_commit_msg(reporoot):
 670     return run_cmd(["git", "log", "-1"], dir=reporoot, output=True)
 671
 672 try:
 673     os.makedirs(testbase)
 674 except Exception, reason:
 675     raise Exception("Unable to create %s : %s" % (testbase, reason))
 676 cleanup_list.append(testbase)
 677
 678 if options.daemon:
 679     logfile = os.path.join(testbase, "log")
 680     print "Forking into the background, writing progress to %s" % logfile
 681     daemonize(logfile)
 682
 683 while True:
 684     try:
 685         run_cmd(["rm", "-rf", test_master])
 686         cleanup_list.append(test_master)
 687         clone_gitroot(test_master, revision)
 688     except:
 689         cleanup()
 690         raise
 691
 692     try:
 693         if options.rebase is not None:
 694             rebase_tree(options.rebase)
 695         elif options.rebase_master:
 696             rebase_tree(samba_master)
 697         blist = BuildList(tasks, args)
 698         if options.tail:
 699             blist.start_tail()
 700         (exitcode, failed_task, failed_stage, failed_tag, errstr) = blist.run()
 701         if exitcode != 0 or errstr != "retry":
 702             break
 703         cleanup()
 704     except:
 705         cleanup()
 706         raise
 707
 708 blist.kill_kids()
 709 if options.tail:
 710     print("waiting for tail to flush")
 711     time.sleep(1)
 712
 713 if exitcode == 0:
 714     print errstr
 715     if options.passcmd is not None:
 716         print("Running passcmd: %s" % options.passcmd)
 717         run_cmd(options.passcmd, dir=test_master, shell=True)
 718     if options.pushto is not None:
 719         push_to(options.pushto)
 720     elif options.push_master:
 721         push_to(samba_master_ssh)
 722     if options.keeplogs:
 723         blist.tarlogs("logs.tar.gz")
 724         print("Logs in logs.tar.gz")
 725     if options.always_email:
 726         email_success(blist)
 727     blist.remove_logs()
 728     cleanup()
 729     print(errstr)
 730 else:
 731     # something failed, gather a tar of the logs
 732     blist.tarlogs("logs.tar.gz")
 733
 734     if options.email is not None:
 735         email_failure(blist, exitcode, failed_task, failed_stage, failed_tag,
 736             errstr)
 737
 738     cleanup()
 739     print(errstr)
 740     print("Logs in logs.tar.gz")
 741 sys.exit(exitcode)