| #!/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. |
| |
| from __future__ import print_function |
| |
| 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).decode('utf-8') |
| except subprocess.CalledProcessError as e: |
| print(e.output.decode('utf-8')) |
| raise |
| |
| if desc_json_txt.startswith('WARNING'): |
| print('\ngn generated a warning when we asked for JSON output.', |
| 'To see the warning, run this command from the out_dir:', |
| '(you may need to quote the * argument)\n', |
| ' '.join(gn_desc_cmd), |
| '\n', sep='\n') |
| sys.exit(-1) |
| |
| 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 = sorted(headers.values(), 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') |