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- #!/usr/bin/env python
- #
- # Copyright 2016 Google Inc.
- #
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
- import collections
- import json
- import os
- import subprocess
- import sys
- # Finds all public sources in include directories then write them to skia.h.
- # Also write skia.h.deps, which Ninja uses to track dependencies. It's the
- # very same mechanism Ninja uses to know which .h files affect which .cpp files.
- gn = sys.argv[1]
- absolute_source = sys.argv[2]
- skia_h = sys.argv[3]
- include_dirs = sys.argv[4:]
- absolute_source = os.path.normpath(absolute_source)
- include_dirs = [os.path.join(os.path.normpath(include_dir), '')
- for include_dir in include_dirs]
- include_dirs.sort(key=len, reverse=True)
- gn_desc_cmd = [gn, 'desc', '.', '--root=%s' % absolute_source, '--format=json',
- '*']
- desc_json_txt = ''
- try:
- desc_json_txt = subprocess.check_output(gn_desc_cmd)
- except subprocess.CalledProcessError as e:
- print (e.output)
- raise
- desc_json = {}
- try:
- desc_json = json.loads(desc_json_txt)
- except ValueError:
- print (desc_json_txt)
- raise
- sources = set()
- for target in desc_json.values():
- # We'll use `public` headers if they're listed, or pull them from `sources`
- # if not. GN sneaks in a default "public": "*" into the JSON if you don't
- # set one explicitly.
- search_list = target.get('public')
- if search_list == '*':
- search_list = target.get('sources', [])
- for name in search_list:
- sources.add(os.path.join(absolute_source, os.path.normpath(name[2:])))
- Header = collections.namedtuple('Header', ['absolute', 'include'])
- headers = {}
- for source in sources:
- source_as_include = [os.path.relpath(source, absolute_source)
- for include_dir in include_dirs
- if source.startswith(include_dir)]
- if not source_as_include:
- continue
- statinfo = os.stat(source)
- key = str(statinfo.st_ino) + ':' + str(statinfo.st_dev)
- # On Windows os.stat st_ino is 0 until 3.3.4 and st_dev is 0 until 3.4.0.
- if key == '0:0':
- key = source
- include_path = source_as_include[0]
- if key not in headers or len(include_path) < len(headers[key].include):
- headers[key] = Header(source, include_path)
- headers = headers.values()
- sorted(headers, key=lambda x: x.include)
- with open(skia_h, 'w') as f:
- f.write('// skia.h generated by GN.\n')
- f.write('#ifndef skia_h_DEFINED\n')
- f.write('#define skia_h_DEFINED\n')
- for header in headers:
- f.write('#include "' + header.include + '"\n')
- f.write('#endif//skia_h_DEFINED\n')
- with open(skia_h + '.deps', 'w') as f:
- f.write(skia_h + ':')
- for header in headers:
- f.write(' ' + header.absolute)
- f.write(' build.ninja.d')
- f.write('\n')
- # Temporary: during development this file wrote skia.h.d, not skia.h.deps,
- # and I think we have some bad versions of those files laying around.
- if os.path.exists(skia_h + '.d'):
- os.remove(skia_h + '.d')
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