1#!/usr/bin/env python 2# 3# Copyright 2016 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 8from __future__ import print_function 9 10import collections 11import json 12import os 13import subprocess 14import sys 15 16# Finds all public sources in include directories then write them to skia.h. 17 18# Also write skia.h.deps, which Ninja uses to track dependencies. It's the 19# very same mechanism Ninja uses to know which .h files affect which .cpp files. 20 21gn = sys.argv[1] 22absolute_source = sys.argv[2] 23skia_h = sys.argv[3] 24include_dirs = sys.argv[4:] 25 26absolute_source = os.path.normpath(absolute_source) 27 28include_dirs = [os.path.join(os.path.normpath(include_dir), '') 29 for include_dir in include_dirs] 30include_dirs.sort(key=len, reverse=True) 31 32gn_desc_cmd = [gn, 'desc', '.', '--root=%s' % absolute_source, '--format=json', 33 '*'] 34 35desc_json_txt = '' 36try: 37 desc_json_txt = subprocess.check_output(gn_desc_cmd) 38except subprocess.CalledProcessError as e: 39 print(e.output) 40 raise 41 42desc_json = {} 43try: 44 desc_json = json.loads(desc_json_txt) 45except ValueError: 46 print(desc_json_txt) 47 raise 48 49sources = set() 50 51for target in desc_json.values(): 52 # We'll use `public` headers if they're listed, or pull them from `sources` 53 # if not. GN sneaks in a default "public": "*" into the JSON if you don't 54 # set one explicitly. 55 search_list = target.get('public') 56 if search_list == '*': 57 search_list = target.get('sources', []) 58 59 for name in search_list: 60 sources.add(os.path.join(absolute_source, os.path.normpath(name[2:]))) 61 62Header = collections.namedtuple('Header', ['absolute', 'include']) 63headers = {} 64for source in sources: 65 source_as_include = [os.path.relpath(source, absolute_source) 66 for include_dir in include_dirs 67 if source.startswith(include_dir)] 68 if not source_as_include: 69 continue 70 statinfo = os.stat(source) 71 key = str(statinfo.st_ino) + ':' + str(statinfo.st_dev) 72 # On Windows os.stat st_ino is 0 until 3.3.4 and st_dev is 0 until 3.4.0. 73 if key == '0:0': 74 key = source 75 include_path = source_as_include[0] 76 if key not in headers or len(include_path) < len(headers[key].include): 77 headers[key] = Header(source, include_path) 78 79headers = sorted(headers.values(), key=lambda x: x.include) 80 81with open(skia_h, 'w') as f: 82 f.write('// skia.h generated by GN.\n') 83 f.write('#ifndef skia_h_DEFINED\n') 84 f.write('#define skia_h_DEFINED\n') 85 for header in headers: 86 f.write('#include "' + header.include + '"\n') 87 f.write('#endif//skia_h_DEFINED\n') 88 89with open(skia_h + '.deps', 'w') as f: 90 f.write(skia_h + ':') 91 for header in headers: 92 f.write(' ' + header.absolute) 93 f.write(' build.ninja.d') 94 f.write('\n') 95 96# Temporary: during development this file wrote skia.h.d, not skia.h.deps, 97# and I think we have some bad versions of those files laying around. 98if os.path.exists(skia_h + '.d'): 99 os.remove(skia_h + '.d') 100