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      1 #!/usr/bin/env python
      2 
      3 # Copyright 2015 Google Inc.
      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 will update Skia's dependencies as necessary and run
      9 # gyp if needed.
     10 
     11 # Depends on: Python, Git, and depot_tools.
     12 #
     13 # Example usage:
     14 #
     15 #   git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
     16 #   export PATH="${PWD}/depot_tools:${PATH}"
     17 #   git clone https://skia.googlesource.com/skia
     18 #   cd skia
     19 #   python bin/sync-and-gyp
     20 #   ninja -C out/Debug && out/Debug/dm
     21 #
     22 # Once changes are made to DEPS or gyp/ or the source, call:
     23 #
     24 #   python bin/sync-and-gyp
     25 
     26 # To retreive and use all optional deps:
     27 #
     28 #   python bin/sync-and-gyp --deps=all
     29 #   ninja -C out/Debug && out/Debug/dm
     30 
     31 import fnmatch
     32 import hashlib
     33 import os
     34 import subprocess
     35 import sys
     36 
     37 skia_dir = os.path.join(os.path.dirname(__file__), os.pardir)
     38 
     39 skia_opt_deps = [arg for arg in sys.argv[1:] if arg.startswith('--deps=')]
     40 
     41 skia_out = os.environ.get("SKIA_OUT")
     42 if skia_out:
     43   skia_out = os.path.abspath(skia_out)
     44   hash_path = os.path.join(skia_out, 'gyp_hash')
     45 else:
     46   hash_path = os.path.join('out', 'gyp_hash')
     47 
     48 os.chdir(skia_dir)
     49 
     50 if not os.path.isfile('DEPS'):
     51   sys.stderr.write('DEPS file missing')
     52   exit(1)
     53 
     54 deps_hasher = hashlib.sha1()
     55 with open('DEPS', 'r') as f:
     56   deps_hasher.update(f.read())
     57 deps_hasher.update(repr(skia_opt_deps))
     58 deps_hash = deps_hasher.hexdigest()
     59 current_deps_hash = None
     60 if os.path.isfile('.deps_sha1'):
     61   with open('.deps_sha1', 'r') as f:
     62     current_deps_hash = f.read().strip()
     63 
     64 default_gclient_config = '''
     65 solutions = [
     66   { "name"        : ".",
     67     "url"         : "https://skia.googlesource.com/skia.git",
     68     "deps_file"   : "DEPS",
     69     "managed"     : False,
     70     "custom_deps" : {
     71     },
     72     "safesync_url": "",
     73   },
     74 ]
     75 cache_dir = None
     76 '''
     77 
     78 # Must use gclient.bat rather than gclient on windows (at least on mingw)
     79 gclient = 'gclient'
     80 if sys.platform == 'win32' or sys.platform == 'cygwin':
     81   gclient = 'gclient.bat'
     82 
     83 if current_deps_hash != deps_hash:
     84   # `gclient sync` is very slow, so skip whenever we can.
     85   try:
     86     subprocess.call([gclient, '--version'])
     87   except:
     88     sys.stdout.write('gclient missing from $PATH, please install ' +
     89                      'depot_tools\n    https://skia.org/user/quick/desktop\n')
     90     exit(1)
     91   if not os.path.isfile('.gclient'):
     92     with open('.gclient', 'w') as o:
     93       o.write(default_gclient_config)
     94   gclient_sync_command = [gclient, 'sync'] + skia_opt_deps
     95   try:
     96     sys.stdout.write('%r\n' % gclient_sync_command)
     97     subprocess.check_call(gclient_sync_command)
     98   except:
     99     sys.stderr.write('\n`gclient sync` failed.\n')
    100     try:
    101       os.remove('.deps_sha1')  # Unknown state.
    102     except:
    103       pass
    104     exit(1)
    105   # Only write hash after a successful sync.
    106   with open('.deps_sha1', 'w') as o:
    107     o.write(deps_hash)
    108 
    109 hasher = hashlib.sha1()
    110 
    111 for var in ['AR', 'AR_host', 'AR_target',
    112             'CC', 'CC_host', 'CC_target',
    113             'CFLAGS', 'CFLAGS_host',
    114             'CPPFLAGS', 'CPPFLAGS_host',
    115             'CXX', 'CXX_host', 'CXX_target',
    116             'GYP_DEFINES', 'GYP_GENERATORS',
    117             'NM', 'NM_host', 'NM_target',
    118             'READELF', 'READELF_host', 'READELF_target']:
    119   hasher.update(os.environ.get(var, '') + '\n')
    120 
    121 def listfiles(folder, matchfilter):
    122   for root, folders, files in os.walk(folder):
    123     for filename in files:
    124       if fnmatch.fnmatch(filename, matchfilter):
    125         yield os.path.join(root, filename)
    126 
    127 for filename in sorted(listfiles('gyp', '*')):
    128   with open(filename, 'r') as f:
    129     hasher.update(f.read())
    130 
    131 for dir in ['bench', 'gm', 'tests']:
    132   for filename in sorted(listfiles(dir, '*.c*')):
    133     hasher.update(filename + '\n')
    134 
    135 gyp_hash = hasher.hexdigest()
    136 
    137 def cat_if_exists(path):
    138   if os.path.exists(path):
    139     with open(path, 'r') as f:
    140       return f.read()
    141   return ''
    142 
    143 if cat_if_exists(hash_path).strip() != gyp_hash:
    144   env = os.environ.copy()
    145   if skia_out:
    146     env['SKIA_OUT'] = skia_out
    147   subprocess.call(['python', './gyp_skia'], env=env)
    148   with open(hash_path, 'w') as o:
    149     o.write(gyp_hash)
    150