build/cl.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 import os, os.path
   6 import subprocess
   7 import sys
   8
   9 CL_INCLUDES_PREFIX = os.environ.get("CL_INCLUDES_PREFIX", "Note: including file:")
  10
  11 def InvokeClWithDependencyGeneration(cmdline):
  12     target = ""
  13     # Figure out what the target is
  14     for arg in cmdline:
  15         if arg.startswith("-Fo"):
  16             target = arg[3:]
  17             break
  18
  19     if target == None:
  20         print >>sys.stderr, "No target set" and sys.exit(1)
  21
  22     # The deps target lives here
  23     depstarget = os.path.basename(target) + ".pp"
  24
  25     cmdline += ['-showIncludes']
  26     cl = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
  27
  28     deps = set()
  29     for line in cl.stdout:
  30         # cl -showIncludes prefixes every header with "Note: including file:"
  31         # and an indentation corresponding to the depth (which we don't need)
  32         if line.startswith(CL_INCLUDES_PREFIX):
  33             dep = line[len(CL_INCLUDES_PREFIX):].strip()
  34             # We can't handle pathes with spaces properly in mddepend.pl, but
  35             # we can assume that anything in a path with spaces is a system
  36             # header and throw it away.
  37             if dep.find(' ') == -1:
  38                 deps.add(dep)
  39         else:
  40             sys.stdout.write(line) # Make sure we preserve the relevant output
  41                                    # from cl
  42
  43     ret = cl.wait()
  44     if ret != 0 or target == "":
  45         sys.exit(ret)
  46
  47     depsdir = os.path.normpath(os.path.join(os.curdir, ".deps"))
  48     depstarget = os.path.join(depsdir, depstarget)
  49     if not os.path.isdir(depsdir):
  50         try:
  51             os.makedirs(depsdir)
  52         except OSError:
  53             pass # This suppresses the error we get when the dir exists, at the
  54                  # cost of masking failure to create the directory.  We'll just
  55                  # die on the next line though, so it's not that much of a loss.
  56
  57     f = open(depstarget, "w")
  58     for dep in sorted(deps):
  59         print >>f, "%s: %s" % (target, dep)
  60
  61 if __name__ == "__main__":
  62     InvokeClWithDependencyGeneration(sys.argv[1:])