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"""
The LLVM Compiler Infrastructure
This file is distributed under the University of Illinois Open Source
License. See LICENSE.TXT for details.
Prepares language bindings for LLDB build process. Run with --help
to see a description of the supported command line arguments.
"""
# Python modules:
import os
import platform
import sys
def _find_file_in_paths(paths, exe_basename):
"""Returns the full exe path for the first path match.
@params paths the list of directories to search for the exe_basename
executable
@params exe_basename the name of the file for which to search.
e.g. "swig" or "swig.exe".
@return the full path to the executable if found in one of the
given paths; otherwise, returns None.
"""
for path in paths:
trial_exe_path = os.path.join(path, exe_basename)
if os.path.exists(trial_exe_path):
return os.path.normcase(trial_exe_path)
return None
def find_executable(executable):
"""Finds the specified executable in the PATH or known good locations."""
# Figure out what we're looking for.
if platform.system() == "Windows":
executable = executable + ".exe"
extra_dirs = []
else:
extra_dirs = ["/usr/local/bin"]
# Figure out what paths to check.
path_env = os.environ.get("PATH", None)
if path_env is not None:
paths_to_check = path_env.split(os.path.pathsep)
else:
paths_to_check = []
# Add in the extra dirs
paths_to_check.extend(extra_dirs)
if len(paths_to_check) < 1:
raise os.OSError(
"executable was not specified, PATH has no "
"contents, and there are no extra directories to search")
result = _find_file_in_paths(paths_to_check, executable)
if not result or len(result) < 1:
raise os.OSError(
"failed to find exe='%s' in paths='%s'" %
(executable, paths_to_check))
return result
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