script/bisect-test.py

   1 #!/usr/bin/env python
   2 # use git bisect to work out what commit caused a test failure
   3 # Copyright Andrew Tridgell 2010
   4 # released under GNU GPL v3 or later
   5
   6
   7 from subprocess import call, check_call, Popen, PIPE
   8 import os, tempfile, sys
   9 from optparse import OptionParser
  10
  11 parser = OptionParser()
  12 parser.add_option("", "--good", help="known good revision (default HEAD~100)", default='HEAD~100')
  13 parser.add_option("", "--bad", help="known bad revision (default HEAD)", default='HEAD')
  14 parser.add_option("", "--skip-build-errors", help="skip revision where make fails",
  15                   action='store_true', default=False)
  16 parser.add_option("", "--autogen", help="run autogen before each build",action="store_true", default=False)
  17 parser.add_option("", "--autogen-command", help="command to use for autogen (default ./autogen.sh)",
  18                   type='str', default="./autogen.sh")
  19 parser.add_option("", "--configure", help="run configure.developer before each build",
  20     action="store_true", default=False)
  21 parser.add_option("", "--configure-command", help="the command for configure (default ./configure.developer)",
  22                   type='str', default="./configure.developer")
  23 parser.add_option("", "--build-command", help="the command to build the tree (default 'make -j')",
  24                   type='str', default="make -j")
  25 parser.add_option("", "--test-command", help="the command to test the tree (default 'make test')",
  26                   type='str', default="make test")
  27 parser.add_option("", "--clean", help="run make clean before each build",
  28                   action="store_true", default=False)
  29
  30
  31 (opts, args) = parser.parse_args()
  32
  33
  34 def run_cmd(cmd, dir=".", show=True, output=False, checkfail=True):
  35     if show:
  36         print("Running: '%s' in '%s'" % (cmd, dir))
  37     if output:
  38         return Popen([cmd], shell=True, stdout=PIPE, cwd=dir).communicate()[0]
  39     elif checkfail:
  40         return check_call(cmd, shell=True, cwd=dir)
  41     else:
  42         return call(cmd, shell=True, cwd=dir)
  43
  44 def find_git_root():
  45     '''get to the top of the git repo'''
  46     p=os.getcwd()
  47     while p != '/':
  48         if os.path.isdir(os.path.join(p, ".git")):
  49             return p
  50         p = os.path.abspath(os.path.join(p, '..'))
  51     return None
  52
  53 cwd = os.getcwd()
  54 gitroot = find_git_root()
  55
  56 # create a bisect script
  57 f = tempfile.NamedTemporaryFile(delete=False)
  58 f.write("set -x\n")
  59 f.write("cd %s || exit 125\n" % cwd)
  60 if opts.autogen:
  61     f.write("%s || exit 125\n" % opts.autogen_command)
  62 if opts.configure:
  63     f.write("%s || exit 125\n" % opts.configure_command)
  64 if opts.clean:
  65     f.write("make clean || exit 125\n")
  66 if opts.skip_build_errors:
  67     build_err = 125
  68 else:
  69     build_err = 1
  70 f.write("%s || exit %u\n" % (opts.build_command, build_err))
  71 f.write("%s || exit 1\n" % opts.test_command)
  72 f.write("exit 0\n")
  73 f.close()
  74
  75 def cleanup():
  76     run_cmd("git bisect reset", dir=gitroot)
  77     os.unlink(f.name)
  78     sys.exit(-1)
  79
  80 # run bisect
  81 ret = -1
  82 try:
  83     run_cmd("git bisect reset", dir=gitroot, show=False, checkfail=False)
  84     run_cmd("git bisect start %s %s --" % (opts.bad, opts.good), dir=gitroot)
  85     ret = run_cmd("git bisect run bash %s" % f.name, dir=gitroot, show=True, checkfail=False)
  86 except KeyboardInterrupt:
  87     print("Cleaning up")
  88     cleanup()
  89 except Exception, reason:
  90     print("Failed bisect: %s" % reason)
  91     cleanup()
  92
  93 run_cmd("git bisect reset", dir=gitroot)
  94 os.unlink(f.name)
  95 sys.exit(ret)