/build/cl.py

 1# ***** BEGIN LICENSE BLOCK *****
 2# Version: MPL 1.1/GPL 2.0/LGPL 2.1
 3#
 4# The contents of this file are subject to the Mozilla Public License Version
 5# 1.1 (the "License"); you may not use this file except in compliance with
 6# the License. You may obtain a copy of the License at
 7# http://www.mozilla.org/MPL/
 8#
 9# Software distributed under the License is distributed on an "AS IS" basis,
10# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11# for the specific language governing rights and limitations under the
12# License.
13#
14# The Original Code is cl.py: a python wrapper for cl to automatically generate
15# dependency information.
16#
17# The Initial Developer of the Original Code is
18#   Mozilla Foundation.
19# Portions created by the Initial Developer are Copyright (C) 2010
20# the Initial Developer. All Rights Reserved.
21#
22# Contributor(s):
23#   Kyle Huey <me@kylehuey.com>
24#
25# Alternatively, the contents of this file may be used under the terms of
26# either the GNU General Public License Version 2 or later (the "GPL"), or
27# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28# in which case the provisions of the GPL or the LGPL are applicable instead
29# of those above. If you wish to allow use of your version of this file only
30# under the terms of either the GPL or the LGPL, and not to allow others to
31# use your version of this file under the terms of the MPL, indicate your
32# decision by deleting the provisions above and replace them with the notice
33# and other provisions required by the GPL or the LGPL. If you do not delete
34# the provisions above, a recipient may use your version of this file under
35# the terms of any one of the MPL, the GPL or the LGPL.
36#
37# ***** END LICENSE BLOCK *****
38
39import os, os.path
40import subprocess
41import sys
42
43CL_INCLUDES_PREFIX = os.environ.get("CL_INCLUDES_PREFIX", "Note: including file:")
44
45def InvokeClWithDependencyGeneration(cmdline):
46    target = ""
47    # Figure out what the target is
48    for arg in cmdline:
49        if arg.startswith("-Fo"):
50            target = arg[3:]
51            break
52
53    if target == None:
54        print >>sys.stderr, "No target set" and sys.exit(1)
55
56    # The deps target lives here
57    depstarget = os.path.basename(target) + ".pp"
58
59    cmdline += ['-showIncludes']
60    cl = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
61
62    deps = set()
63    for line in cl.stdout:
64        # cl -showIncludes prefixes every header with "Note: including file:"
65        # and an indentation corresponding to the depth (which we don't need)
66        if line.startswith(CL_INCLUDES_PREFIX):
67            dep = line[len(CL_INCLUDES_PREFIX):].strip()
68            # We can't handle pathes with spaces properly in mddepend.pl, but
69            # we can assume that anything in a path with spaces is a system
70            # header and throw it away.
71            if dep.find(' ') == -1:
72                deps.add(dep)
73        else:
74            sys.stdout.write(line) # Make sure we preserve the relevant output
75                                   # from cl
76
77    ret = cl.wait()
78    if ret != 0 or target == "":
79        sys.exit(ret)
80
81    depsdir = os.path.normpath(os.path.join(os.path.dirname(target), ".deps"))
82    depstarget = os.path.join(depsdir, depstarget)
83    if not os.path.isdir(depsdir):
84        try:
85            os.makedirs(depsdir)
86        except OSError:
87            pass # This suppresses the error we get when the dir exists, at the
88                 # cost of masking failure to create the directory.  We'll just
89                 # die on the next line though, so it's not that much of a loss.
90
91    f = open(depstarget, "w")
92    for dep in sorted(deps):
93        print >>f, "%s: %s" % (target, dep)
94
95if __name__ == "__main__":
96    InvokeClWithDependencyGeneration(sys.argv[1:])