| #!/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) |
| |
| # If skia ever uses 'public' that will need to be considered as well or instead. |
| gn_sources_cmd = [gn, 'desc', '.', '--format=json', '*', 'sources'] |
| sources_json = json.loads(subprocess.check_output(gn_sources_cmd)) |
| sources = {os.path.join(absolute_source, os.path.normpath(source[2:])) |
| for target in sources_json.itervalues() |
| for source in target.get('sources', [])} |
| |
| Header = collections.namedtuple('Header', ['absolute', 'include']) |
| headers = {} |
| for source in sources: |
| source_as_include = [source[len(include_dir):] |
| 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() |
| headers.sort(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') |