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| 1 #!/usr/bin/env python | |
| 2 # Copyright (c) 2012 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 """A helper script for setting up forwarding headers.""" | |
| 7 | |
| 8 import errno | |
| 9 import os | |
| 10 import sys | |
| 11 | |
| 12 | |
| 13 def GetHeaderFilesInDir(dir_path): | |
| 14 """Return a list of all header files under dir_path | |
| 15 (as absolute native paths).""" | |
| 16 all_files = [] | |
| 17 for root, dirs, files in os.walk(dir_path): | |
| 18 all_files.extend([os.path.join(root, f) for f in files if f.endswith('.h')]) | |
| 19 return all_files | |
| 20 | |
| 21 | |
| 22 def PathForInclude(path): | |
| 23 # We should always use unix-style forward slashes in #includes. | |
| 24 return path.replace(os.sep, '/') | |
| 25 | |
| 26 | |
| 27 def NativePath(path): | |
| 28 return path.replace('/', os.sep) | |
| 29 | |
| 30 | |
| 31 def PathForGyp(path): | |
| 32 # GYP will try to shell-escape backslashes, so we should always | |
| 33 # return unix-style paths with forward slashes as the directory separators. | |
| 34 return path.replace(os.sep, '/') | |
| 35 | |
| 36 | |
| 37 def Inputs(args): | |
| 38 """List the files in the provided input dir. | |
| 39 | |
| 40 args: A list with 1 value, the input dir. | |
| 41 Returns: 0 on success, other value on error.""" | |
| 42 if len(args) != 1: | |
| 43 print "'inputs' expects only one input directory." | |
| 44 return -1 | |
| 45 | |
| 46 for filename in GetHeaderFilesInDir(args[0]): | |
| 47 print PathForGyp(filename) | |
| 48 return 0 | |
| 49 | |
| 50 | |
| 51 def Outputs(args): | |
| 52 """Takes an input dir and an output dir and figures out new output files | |
| 53 based on copying from the input dir to the output dir. | |
| 54 | |
| 55 args: A list with 2 values, the input dir and the output dir. | |
| 56 Returns: 0 on success, other value on error.""" | |
| 57 if len(args) != 2: | |
| 58 print "'outputs' expects an input directory and an output directory." | |
| 59 return -1 | |
| 60 | |
| 61 base_input_dir = NativePath(args[0]) | |
| 62 output_dir = NativePath(args[1]) | |
| 63 input_files = GetHeaderFilesInDir(base_input_dir) | |
| 64 for filename in input_files: | |
| 65 rel_path = os.path.relpath(filename, base_input_dir) | |
| 66 print PathForGyp(os.path.join(output_dir, rel_path)) | |
| 67 | |
| 68 | |
| 69 def SetupHeaders(args): | |
| 70 """Takes an input dir and an output dir and sets up forwarding headers | |
| 71 from output dir to files in input dir. | |
| 72 args: A list with 3 values, the input dir, the output dir, and the dir | |
| 73 that #include paths will be relative to.. | |
| 74 Returns: 0 on success, other value on error.""" | |
| 75 if len(args) != 3: | |
| 76 print ("'setup_headers' expects an input directory, an output directory, ." | |
| 77 "and a directory to make includes relative to.") | |
| 78 return -1 | |
| 79 | |
| 80 base_input_dir = NativePath(args[0]) | |
| 81 output_dir = NativePath(args[1]) | |
| 82 relative_to_dir = NativePath(args[2]) | |
| 83 input_files = GetHeaderFilesInDir(base_input_dir) | |
| 84 for input_filename in input_files: | |
| 85 rel_path = os.path.relpath(input_filename, base_input_dir) | |
| 86 out_filename = os.path.join(output_dir, rel_path) | |
| 87 TryToMakeDir(os.path.split(out_filename)[0]) | |
| 88 WriteForwardingHeader(input_filename, out_filename, relative_to_dir) | |
| 89 | |
| 90 | |
| 91 def TryToMakeDir(dir_name): | |
| 92 """Create the directory dir_name if it doesn't exist.""" | |
| 93 try: | |
| 94 os.makedirs(dir_name) | |
| 95 except OSError, e: | |
| 96 if e.errno != errno.EEXIST: | |
| 97 raise e | |
| 98 | |
| 99 | |
| 100 def WriteForwardingHeader(input_filename, out_filename, relative_to_dir): | |
| 101 """Create a forwarding header from out_filename to input_filename.""" | |
| 102 # Windows has a file path limit of 260 characters, which can be hit when | |
| 103 # generating these forwarding headers. Instead of using an include | |
| 104 # that specifies the path relative to out_filename's dir, we compute a path | |
| 105 # relative to relative_to_dir, which must be included in gyp's include_dirs | |
| 106 # settings for this to work. Even those this is really only needed on | |
| 107 # Windows, we do this on all platforms to be consistent. | |
| 108 rel_path = os.path.relpath(input_filename, relative_to_dir) | |
| 109 out_file = open(out_filename, 'w') | |
| 110 out_file.write("""// This file is generated. Do not edit. | |
| 111 // The include is relative to "%s". | |
| 112 #include "%s" | |
| 113 """ % (os.path.abspath(relative_to_dir), PathForInclude(rel_path))) | |
| 114 out_file.close() | |
| 115 | |
| 116 | |
| 117 def Main(argv): | |
| 118 commands = { | |
| 119 'inputs': Inputs, | |
| 120 'outputs': Outputs, | |
| 121 'setup_headers': SetupHeaders, | |
| 122 } | |
| 123 command = argv[1] | |
| 124 args = argv[2:] | |
| 125 return commands[command](args) | |
| 126 | |
| 127 | |
| 128 if __name__ == '__main__': | |
| 129 sys.exit(Main(sys.argv)) | |
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