Returns the command line to build |filename|. Asks ninja how it would build the source file. If the specified file is a header, tries to find its companion source file first. Args: v8_root: (String) Path to v8/. filename: (String) Path to source file being edited. Returns: (Li
(v8_root, filename)
| 74 | |
| 75 | |
| 76 | def GetClangCommandFromNinjaForFilename(v8_root, filename): |
| 77 | """Returns the command line to build |filename|. |
| 78 | |
| 79 | Asks ninja how it would build the source file. If the specified file is a |
| 80 | header, tries to find its companion source file first. |
| 81 | |
| 82 | Args: |
| 83 | v8_root: (String) Path to v8/. |
| 84 | filename: (String) Path to source file being edited. |
| 85 | |
| 86 | Returns: |
| 87 | (List of Strings) Command line arguments for clang. |
| 88 | """ |
| 89 | if not v8_root: |
| 90 | return [] |
| 91 | |
| 92 | # Generally, everyone benefits from including V8's root, because all of |
| 93 | # V8's includes are relative to that. |
| 94 | v8_flags = ['-I' + os.path.join(v8_root)] |
| 95 | |
| 96 | # Version of Clang used to compile V8 can be newer then version of |
| 97 | # libclang that YCM uses for completion. So it's possible that YCM's libclang |
| 98 | # doesn't know about some used warning options, which causes compilation |
| 99 | # warnings (and errors, because of '-Werror'); |
| 100 | v8_flags.append('-Wno-unknown-warning-option') |
| 101 | |
| 102 | # Header files can't be built. Instead, try to match a header file to its |
| 103 | # corresponding source file. |
| 104 | if filename.endswith('.h'): |
| 105 | base = filename[:-6] if filename.endswith('-inl.h') else filename[:-2] |
| 106 | for alternate in [base + e for e in ['.cc', '.cpp']]: |
| 107 | if os.path.exists(alternate): |
| 108 | filename = alternate |
| 109 | break |
| 110 | else: |
| 111 | # If this is a standalone .h file with no source, we ask ninja for the |
| 112 | # compile flags of some generic cc file ('src/utils/utils.cc'). This |
| 113 | # should contain most/all of the interesting flags for other targets too. |
| 114 | filename = os.path.join(v8_root, 'src', 'utils', 'utils.cc') |
| 115 | |
| 116 | sys.path.append(os.path.join(v8_root, 'tools', 'vim')) |
| 117 | from ninja_output import GetNinjaOutputDirectory |
| 118 | out_dir = os.path.realpath(GetNinjaOutputDirectory(v8_root)) |
| 119 | |
| 120 | # Ninja needs the path to the source file relative to the output build |
| 121 | # directory. |
| 122 | rel_filename = os.path.relpath(os.path.realpath(filename), out_dir) |
| 123 | |
| 124 | # Ask ninja how it would build our source file. |
| 125 | p = subprocess.Popen(['ninja', '-v', '-C', out_dir, '-t', |
| 126 | 'commands', rel_filename + '^'], |
| 127 | stdout=subprocess.PIPE) |
| 128 | stdout, stderr = p.communicate() |
| 129 | if p.returncode: |
| 130 | return v8_flags |
| 131 | |
| 132 | # Ninja might execute several commands to build something. We want the last |
| 133 | # clang command. |
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