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1 #!/usr/bin/env python | |
2 # Copyright 2015 The Chromium Authors. All rights reserved. | |
3 # Use of this source code is governed by a BSD-style license that can be | |
4 # found in the LICENSE file. | |
5 | |
6 """This script drives the execution of the Mojom parser.""" | |
7 | |
8 import os | |
9 import platform | |
10 import subprocess | |
11 import sys | |
12 | |
13 | |
14 # We assume this script is located in the Mojo SDK in | |
15 # tools/bindings/pylib/mojom/parse. | |
16 THIS_DIR = os.path.abspath(os.path.dirname(__file__)) | |
17 SDK_ROOT = os.path.abspath(os.path.join(THIS_DIR, os.pardir, os.pardir, | |
18 os.pardir, os.pardir, os.pardir)) | |
19 PYTHON_SDK_DIR = os.path.abspath(os.path.join(SDK_ROOT, "python")) | |
20 sys.path.insert(0, PYTHON_SDK_DIR) | |
21 # In order to use mojom_files_mojom we need to make sure the dummy mojo_system | |
22 # can be found on the python path. | |
23 sys.path.insert(0, os.path.join(PYTHON_SDK_DIR, "dummy_mojo_system")) | |
24 | |
25 from mojom.generate.generated import mojom_files_mojom | |
26 from mojom.generate.generated import mojom_types_mojom | |
27 from mojo_bindings import serialization | |
28 | |
29 def RunParser(sdk_root, file_names, import_directories=None, | |
30 meta_data_only=False): | |
31 """Runs the mojom parser. Only 64-bit Linux and Mac is supported. | |
32 | |
33 Args: | |
34 sdk_root: {str} Absolute path to the root of the Mojo SDK. The parser | |
35 binary is expected to be found in | |
36 <sdk_root>/tools/bindings/mojom_tool/bin/<platform> | |
37 | |
38 file_names {list of str} Paths to mojom files to be parsed. May be either | |
39 absolute or relative to the current working directory. | |
40 | |
41 import_directories: {list of str} Optional specification of import | |
42 directories where mojom imports should be searched. The elements of the | |
43 list should be absolute paths or paths relative to the current working | |
44 directory. | |
45 | |
46 meta_data_only: {bool} If True then the flag -meta-data-only | |
47 will be passed to the parser. | |
48 | |
49 Returns: | |
50 {str} The serialized mojom_files.MojomFileGraph returned by mojom parser, | |
51 or None if the mojom parser returned a non-zero error code. | |
52 """ | |
53 system_dirs = { | |
54 ("Linux", "64bit"): "linux64", | |
55 ("Darwin", "64bit"): "mac64", | |
56 } | |
57 system = (platform.system(), platform.architecture()[0]) | |
58 if system not in system_dirs: | |
59 raise Exception("The mojom parser only supports Linux or Mac 64 bits.") | |
60 | |
61 mojom_tool = os.path.join(sdk_root, "tools", "bindings", "mojom_tool", | |
62 "bin", system_dirs[system], "mojom") | |
63 | |
64 if not os.path.exists(mojom_tool): | |
65 raise Exception( | |
66 "The mojom parser could not be found at %s. " | |
67 "You may need to run gclient sync." | |
68 % mojom_tool) | |
69 | |
70 cmd = [mojom_tool, "parse"] | |
71 if import_directories: | |
72 cmd.extend(["-I", ",".join(import_directories)]) | |
73 if meta_data_only: | |
74 cmd.extend(["-meta-data-only"]) | |
75 | |
76 cmd.extend(file_names) | |
77 | |
78 try: | |
79 return subprocess.check_output(cmd) | |
80 except subprocess.CalledProcessError: | |
81 return None | |
82 | |
83 | |
84 def DeserializeMojomFileGraph(serialized_bytes): | |
85 """Deserializes a mojom_files.MojomFileGraph. | |
86 | |
87 Args: | |
88 serialized_bytes: {str} The serialized mojom_files.MojomFileGraph returned | |
89 by mojom parser | |
90 Returns: | |
91 {mojom_files.MojomFileGraph} The deserialized MojomFileGraph. | |
92 """ | |
93 data = bytearray(serialized_bytes) | |
94 context = serialization.RootDeserializationContext(data, []) | |
95 return mojom_files_mojom.MojomFileGraph.Deserialize(context) | |
96 | |
97 def ParseToMojomFileGraph(sdk_root, file_names, import_directories=None, | |
98 meta_data_only=False): | |
99 """Runs the mojom parser and deserializes the result. Only 64-bit Linux and | |
100 Mac is supported. | |
101 | |
102 Args: | |
103 sdk_root: {str} Absolute path to the root of the Mojo SDK. The parser | |
104 binary is expected to be found in | |
105 <sdk_root>/tools/bindings/mojom_tool/bin/<platform> | |
106 | |
107 file_names {list of str} Paths to mojom files to be parsed. May be either | |
108 absolute or relative to the current working directory. | |
109 | |
110 import_directories: {list of str} Optional specification of import | |
111 directories where mojom imports should be searched. The elements of the | |
112 list should be absolute paths or paths relative to the current working | |
113 directory. | |
114 | |
115 meta_data_only: {bool} If True then the flag -meta-data-only | |
116 will be passed to the parser. | |
117 | |
118 Returns: | |
119 {mojom_files.MojomFileGraph} The deserialized MojomFileGraph obtained by | |
120 deserializing the bytes returned by mojom parser, or None if the mojom | |
121 parser returned a non-zero error code. | |
122 """ | |
123 serialized_bytes = RunParser(sdk_root, file_names, import_directories, | |
124 meta_data_only) | |
125 if serialized_bytes is None: | |
126 return None | |
127 return DeserializeMojomFileGraph(serialized_bytes) | |
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