1#!/usr/bin/python
2
3# [PR 11661] Note that we hardwire to /usr/bin/python because we
4# want to the use the system version of Python on Mac OS X.
5# This one has the scripting bridge enabled.
6
7import sys
8if sys.version_info < (2, 7):
9    print "set-xcode-analyzer requires Python 2.7 or later"
10    sys.exit(1)
11
12import os
13import subprocess
14import re
15import tempfile
16import shutil
17import stat
18from AppKit import *
19
20def FindClangSpecs(path):
21  print "(+) Searching for xcspec file in: ", path
22  for root, dirs, files in os.walk(path):
23    for f in files:
24      if f.endswith(".xcspec") and f.startswith("Clang LLVM"):
25        yield os.path.join(root, f)
26
27def ModifySpec(path, isBuiltinAnalyzer, pathToChecker):
28  t = tempfile.NamedTemporaryFile(delete=False)
29  foundAnalyzer = False
30  with open(path) as f:
31    if isBuiltinAnalyzer:
32      # First search for CLANG_ANALYZER_EXEC.  Newer
33      # versions of Xcode set EXEC_PATH to be CLANG_ANALYZER_EXEC.
34      with open(path) as f2:
35        for line in f2:
36          if line.find("CLANG_ANALYZER_EXEC") >= 0:
37            pathToChecker = "$(CLANG_ANALYZER_EXEC)"
38            break
39    # Now create a new file.
40    for line in f:
41      if not foundAnalyzer:
42        if line.find("Static Analyzer") >= 0:
43          foundAnalyzer = True
44      else:
45        m = re.search('^(\s*ExecPath\s*=\s*")', line)
46        if m:
47          line = "".join([m.group(0), pathToChecker, '";\n'])
48          # Do not modify further ExecPath's later in the xcspec.
49          foundAnalyzer = False
50      t.write(line)
51  t.close()
52  print "(+) processing:", path
53  try:
54    shutil.copy(t.name, path)
55    os.chmod(path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
56  except IOError, why:
57    print "    (-) Cannot update file:", why, "\n"
58  except OSError, why:
59    print "    (-) Cannot update file:", why, "\n"
60  os.unlink(t.name)
61
62def main():
63  from optparse import OptionParser
64  parser = OptionParser('usage: %prog [options]')
65  parser.set_description(__doc__)
66  parser.add_option("--use-checker-build", dest="path",
67                    help="Use the Clang located at the provided absolute path, e.g. /Users/foo/checker-1")
68  parser.add_option("--use-xcode-clang", action="store_const",
69                    const="$(CLANG)", dest="default",
70                    help="Use the Clang bundled with Xcode")
71  (options, args) = parser.parse_args()
72  if options.path is None and options.default is None:
73    parser.error("You must specify a version of Clang to use for static analysis.  Specify '-h' for details")
74
75  # determine if Xcode is running
76  for x in NSWorkspace.sharedWorkspace().runningApplications():
77    if x.localizedName().find("Xcode") >= 0:
78      print "(-) You must quit Xcode first before modifying its configuration files."
79      sys.exit(1)
80
81  isBuiltinAnalyzer = False
82  if options.path:
83    # Expand tildes.
84    path = os.path.expanduser(options.path)
85    if not path.endswith("clang"):
86      print "(+) Using Clang bundled with checker build:", path
87      path = os.path.join(path, "bin", "clang");
88    else:
89      print "(+) Using Clang located at:", path
90  else:
91    print "(+) Using the Clang bundled with Xcode"
92    path = options.default
93    isBuiltinAnalyzer = True
94
95  try:
96    xcode_path = subprocess.check_output(["xcode-select", "-print-path"])
97  except AttributeError:
98    # Fall back to the default install location when using Python < 2.7.0
99    xcode_path = "/Developer"
100  if (xcode_path.find(".app/") != -1):
101    # Cut off the 'Developer' dir, as the xcspec lies in another part
102    # of the Xcode.app subtree.
103    xcode_path = xcode_path.rsplit('/Developer', 1)[0]
104
105  foundSpec = False
106  for x in FindClangSpecs(xcode_path):
107    foundSpec = True
108    ModifySpec(x, isBuiltinAnalyzer, path)
109
110  if foundSpec == False:
111      print "(-) No compiler configuration file was found.  Xcode's analyzer has not been updated."
112
113if __name__ == '__main__':
114  main()
115