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      1 #!/usr/bin/python
      2 
      3 # Copyright 2011 The Android Open Source Project
      4 #
      5 # Use of this source code is governed by a BSD-style license that can be
      6 # found in the LICENSE file.
      7 
      8 # This script is a wrapper which invokes gyp with the correct --depth argument,
      9 # and supports the automatic regeneration of build files if all.gyp is
     10 # changed (Linux-only).
     11 
     12 import glob
     13 import os
     14 import platform
     15 import shlex
     16 import sys
     17 
     18 script_dir = os.path.dirname(__file__)
     19 
     20 # Directory within which we can find the gyp source.
     21 gyp_source_dir = os.path.join(script_dir, 'third_party', 'externals', 'gyp')
     22 
     23 # Directory within which we can find most of Skia's gyp configuration files.
     24 gyp_config_dir = os.path.join(script_dir, 'gyp')
     25 
     26 # Ensure we import our current gyp source's module, not any version
     27 # pre-installed in your PYTHONPATH.
     28 sys.path.insert(0, os.path.join(gyp_source_dir, 'pylib'))
     29 import gyp
     30 
     31 def additional_include_files(args=[]):
     32   # Determine the include files specified on the command line.
     33   # This doesn't cover all the different option formats you can use,
     34   # but it's mainly intended to avoid duplicating flags on the automatic
     35   # makefile regeneration which only uses this format.
     36   specified_includes = set()
     37   for arg in args:
     38     if arg.startswith('-I') and len(arg) > 2:
     39       specified_includes.add(os.path.realpath(arg[2:]))
     40 
     41   result = []
     42   def AddInclude(path):
     43     if os.path.realpath(path) not in specified_includes:
     44       result.append(path)
     45 
     46   # Always include common.gypi.
     47   # We do this, rather than including common.gypi explicitly in all our gyp
     48   # files, so that gyp files we use but do not maintain (e.g.,
     49   # third_party/externals/libjpeg/libjpeg.gyp) will include common.gypi too.
     50   AddInclude(os.path.join(gyp_config_dir, 'common.gypi'))
     51 
     52   return result
     53 
     54 # Return the directory where all generated files (including Makefiles) are to
     55 # be written.
     56 def get_output_dir():
     57 
     58   # SKIA_OUT can be any directory either as a child of the standard out/
     59   # directory or any given location on the file system (e.g. /tmp/skia)
     60   output_dir = os.getenv('SKIA_OUT')
     61 
     62   if not output_dir:
     63     return os.path.join(os.path.abspath(script_dir), 'out')
     64 
     65   if (sys.platform.startswith('darwin') and 
     66       (not os.getenv('GYP_GENERATORS') or 
     67        'xcode' in os.getenv('GYP_GENERATORS'))):
     68     print 'ERROR: variable SKIA_OUT is not valid on Mac (using xcodebuild)'
     69     sys.exit(-1);
     70 
     71   if os.path.isabs(output_dir):
     72     return output_dir
     73   else:
     74     return os.path.join(os.path.abspath(script_dir), output_dir)
     75 
     76 
     77 if __name__ == '__main__':
     78   args = sys.argv[1:]
     79 
     80   # Set CWD to the directory containing this script.
     81   # This allows us to launch it from other directories, in spite of gyp's
     82   # finickyness about the current working directory.
     83   # See http://b.corp.google.com/issue?id=5019517 ('Linux make build
     84   # (from out dir) no longer runs skia_gyp correctly')
     85   os.chdir(os.path.abspath(script_dir))
     86 
     87   # This could give false positives since it doesn't actually do real option
     88   # parsing.  Oh well.
     89   gyp_file_specified = False
     90   for arg in args:
     91     if arg.endswith('.gyp'):
     92       gyp_file_specified = True
     93       break
     94 
     95   # If we didn't get a file, then fall back to assuming 'skia.gyp' from the
     96   # same directory as the script.
     97   # The gypfile must be passed as a relative path, not an absolute path,
     98   # or else the gyp code doesn't write into the proper output dir.
     99   if not gyp_file_specified:
    100     args.append('skia.gyp')
    101 
    102   args.extend(['-I' + i for i in additional_include_files(args)])
    103   args.extend(['--depth', '.'])
    104 
    105   # Tell gyp to write the Makefiles into output_dir
    106   args.extend(['--generator-output', os.path.abspath(get_output_dir())])
    107 
    108   # Tell make to write its output into the same dir
    109   args.extend(['-Goutput_dir=.'])
    110 
    111   # By default, we build 'most' instead of 'all' or 'everything'. See skia.gyp.
    112   args.extend(['-Gdefault_target=most'])
    113 
    114   print 'Updating projects from gyp files...'
    115   sys.stdout.flush()
    116 
    117   # Off we go...
    118   sys.exit(gyp.main(args))
    119