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| 1 #!/usr/bin/python2.4 | |
| 2 # Copyright 2008, Google Inc. | |
| 3 # All rights reserved. | |
| 4 # | |
| 5 # Redistribution and use in source and binary forms, with or without | |
| 6 # modification, are permitted provided that the following conditions are | |
| 7 # met: | |
| 8 # | |
| 9 # * Redistributions of source code must retain the above copyright | |
| 10 # notice, this list of conditions and the following disclaimer. | |
| 11 # * Redistributions in binary form must reproduce the above | |
| 12 # copyright notice, this list of conditions and the following disclaimer | |
| 13 # in the documentation and/or other materials provided with the | |
| 14 # distribution. | |
| 15 # * Neither the name of Google Inc. nor the names of its | |
| 16 # contributors may be used to endorse or promote products derived from | |
| 17 # this software without specific prior written permission. | |
| 18 # | |
| 19 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 20 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 21 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 22 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 23 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 24 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 25 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 26 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 27 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 28 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 29 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 30 | |
| 31 """Source concatenation builder for SCons.""" | |
| 32 | |
| 33 | |
| 34 import SCons.Script | |
| 35 | |
| 36 | |
| 37 def ConcatSourceBuilder(target, source, env): | |
| 38 """ConcatSource builder. | |
| 39 | |
| 40 Args: | |
| 41 target: List of target nodes | |
| 42 source: List of source nodes | |
| 43 env: Environment in which to build | |
| 44 | |
| 45 Returns: | |
| 46 None if successful; 1 if error. | |
| 47 """ | |
| 48 if len(target) != 1: | |
| 49 print 'ERROR: multiple ConcatSource targets when 1 expected' | |
| 50 return 1 | |
| 51 | |
| 52 output_lines = [ | |
| 53 '// This file is auto-generated by the ConcatSource builder.'] | |
| 54 | |
| 55 for source_path in map(str, source): | |
| 56 if env.get('CC') == 'cl': | |
| 57 # Add message pragma for nicer progress indication when building with | |
| 58 # MSVC. | |
| 59 output_lines.append('#pragma message("--%s")' % ( | |
| 60 source_path.replace("\\", "/"))) | |
| 61 | |
| 62 output_lines.append('#include "%s"' % source_path) | |
| 63 | |
| 64 output_file = open(str(target[0]), 'w') | |
| 65 # Need an EOL at the end of the file for more finicky build tools | |
| 66 output_file.write('\n'.join(output_lines) + '\n') | |
| 67 output_file.close() | |
| 68 | |
| 69 | |
| 70 def ConcatSourcePseudoBuilder(self, target, source): | |
| 71 """ConcatSource pseudo-builder; calls builder or passes through source nodes. | |
| 72 | |
| 73 Args: | |
| 74 self: Environment in which to build | |
| 75 target: List of target nodes | |
| 76 source: List of source nodes | |
| 77 | |
| 78 Returns: | |
| 79 If self['CONCAT_SOURCE_ENABLE'], calls self.ConcatSource and returns | |
| 80 the list of target nodes. Otherwise, returns the list of source nodes. | |
| 81 Source nodes which are not CPP files are passed through unchanged to the | |
| 82 list of output nodes. | |
| 83 """ | |
| 84 if self.get('CONCAT_SOURCE_ENABLE', True): | |
| 85 # Scan down source list and separate CPP sources (which we concatenate) | |
| 86 # from other files (which we pass through). | |
| 87 cppsource = [] | |
| 88 outputs = [] | |
| 89 suffixes = self.Flatten(self.subst_list('$CONCAT_SOURCE_SUFFIXES')) | |
| 90 for source_file in self.arg2nodes(source): | |
| 91 if source_file.suffix in suffixes: | |
| 92 cppsource.append(source_file) | |
| 93 else: | |
| 94 outputs.append(source_file) | |
| 95 | |
| 96 if len(cppsource) > 1: | |
| 97 # More than one file, so concatenate them together | |
| 98 outputs += self.ConcatSourceBuilder(target, cppsource) | |
| 99 else: | |
| 100 # <2 files, so pass them through; no need for a ConcatSource target | |
| 101 outputs += cppsource | |
| 102 return outputs | |
| 103 else: | |
| 104 # ConcatSource is disabled, so pass through the list of source nodes. | |
| 105 return source | |
| 106 | |
| 107 | |
| 108 def generate(env): | |
| 109 # NOTE: SCons requires the use of this name, which fails gpylint. | |
| 110 """SCons entry point for this tool.""" | |
| 111 | |
| 112 # Add the builder | |
| 113 action = SCons.Script.Action(ConcatSourceBuilder, '$CONCAT_SOURCE_COMSTR', | |
| 114 varlist = ['CONCAT_SOURCE_SUFFIXES']) | |
| 115 builder = SCons.Script.Builder(action = action, suffix = '$CXXFILESUFFIX') | |
| 116 env.Append(BUILDERS={'ConcatSourceBuilder': builder}) | |
| 117 | |
| 118 env.SetDefault( | |
| 119 CONCAT_SOURCE_COMSTR = 'Creating ConcatSource $TARGET from $SOURCES', | |
| 120 # Suffixes of sources we can concatenate. Files not in this list will be | |
| 121 # passed through untouched. (Note that on Mac, Objective C/C++ files | |
| 122 # cannot be concatenated with regular C/C++ files.) | |
| 123 # TODO(rspangler): Probably shouldn't mix C, C++ either... | |
| 124 CONCAT_SOURCE_SUFFIXES = ['.c', '.C', '.cxx', '.cpp', '.c++', '.cc', | |
| 125 '.h', '.H', '.hxx', '.hpp', '.hh'], | |
| 126 ) | |
| 127 | |
| 128 # Add a psuedo-builder method which can look at the environment to determine | |
| 129 # whether to call the ConcatSource builder or not | |
| 130 env.AddMethod(ConcatSourcePseudoBuilder, 'ConcatSource') | |
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