# ****************************************************************************** # getpath.py # ****************************************************************************** # This script is designed to be precompiled to bytecode, frozen into the # main binary, and then directly evaluated. It is not an importable module, # and does not import any other modules (besides winreg on Windows). # Rather, the values listed below must be specified in the globals dict # used when evaluating the bytecode. # See _PyConfig_InitPathConfig in Modules/getpath.c for the execution. # ****************************************************************************** # REQUIRED GLOBALS # ****************************************************************************** # ** Helper functions ** # abspath(path) -- make relative paths absolute against CWD # basename(path) -- the filename of path # dirname(path) -- the directory name of path # hassuffix(path, suffix) -- returns True if path has suffix # isabs(path) -- path is absolute or not # isdir(path) -- path exists and is a directory # isfile(path) -- path exists and is a file # isxfile(path) -- path exists and is an executable file # joinpath(*paths) -- combine the paths # readlines(path) -- a list of each line of text in the UTF-8 encoded file # realpath(path) -- resolves symlinks in path # warn(message) -- print a warning (if enabled) # ** Values known at compile time ** # os_name -- [in] one of 'nt', 'posix', 'darwin' # PREFIX -- [in] sysconfig.get_config_var(...) # EXEC_PREFIX -- [in] sysconfig.get_config_var(...) # PYTHONPATH -- [in] sysconfig.get_config_var(...) # WITH_NEXT_FRAMEWORK -- [in] sysconfig.get_config_var(...) # VPATH -- [in] sysconfig.get_config_var(...) # PLATLIBDIR -- [in] sysconfig.get_config_var(...) # PYDEBUGEXT -- [in, opt] '_d' on Windows for debug builds # EXE_SUFFIX -- [in, opt] '.exe' on Windows/Cygwin/similar # VERSION_MAJOR -- [in] sys.version_info.major # VERSION_MINOR -- [in] sys.version_info.minor # PYWINVER -- [in] the Windows platform-specific version (e.g. 3.8-32) # ** Values read from the environment ** # There is no need to check the use_environment flag before reading # these, as the flag will be tested in this script. # Also note that ENV_PYTHONPATH is read from config['pythonpath_env'] # to allow for embedders who choose to specify it via that struct. # ENV_PATH -- [in] getenv(...) # ENV_PYTHONHOME -- [in] getenv(...) # ENV_PYTHONEXECUTABLE -- [in] getenv(...) # ENV___PYVENV_LAUNCHER__ -- [in] getenv(...) # ** Values calculated at runtime ** # config -- [in/out] dict of the PyConfig structure # real_executable -- [in, optional] resolved path to main process # On Windows and macOS, read directly from the running process # Otherwise, leave None and it will be calculated from executable # executable_dir -- [in, optional] real directory containing binary # If None, will be calculated from real_executable or executable # py_setpath -- [in] argument provided to Py_SetPath # If None, 'prefix' and 'exec_prefix' may be updated in config # library -- [in, optional] path of dylib/DLL/so # Only used for locating ._pth files # winreg -- [in, optional] the winreg module (only on Windows) # ****************************************************************************** # HIGH-LEVEL ALGORITHM # ****************************************************************************** # IMPORTANT: The code is the actual specification at time of writing. # This prose description is based on the original comment from the old # getpath.c to help capture the intent, but should not be considered # a specification. # Search in some common locations for the associated Python libraries. # Two directories must be found, the platform independent directory # (prefix), containing the common .py and .pyc files, and the platform # dependent directory (exec_prefix), containing the shared library # modules. Note that prefix and exec_prefix can be the same directory, # but for some installations, they are different. # This script carries out separate searches for prefix and exec_prefix. # Each search tries a number of different locations until a ``landmark'' # file or directory is found. If no prefix or exec_prefix is found, a # warning message is issued and the preprocessor defined PREFIX and # EXEC_PREFIX are used (even though they will not work); python carries on # as best as is possible, but most imports will fail. # Before any searches are done, the location of the executable is # determined. If Py_SetPath() was called, or if we are running on # Windows, the 'real_executable' path is used (if known). Otherwise, # we use the config-specified program name or default to argv[0]. # If this has one or more slashes in it, it is made absolute against # the current working directory. If it only contains a name, it must # have been invoked from the shell's path, so we search $PATH for the # named executable and use that. If the executable was not found on # $PATH (or there was no $PATH environment variable), the original # argv[0] string is used. # At this point, provided Py_SetPath was not used, the # __PYVENV_LAUNCHER__ variable may override the executable (on macOS, # the PYTHON_EXECUTABLE variable may also override). This allows # certain launchers that run Python as a subprocess to properly # specify the executable path. They are not intended for users. # Next, the executable location is examined to see if it is a symbolic # link. If so, the link is realpath-ed and the directory of the link # target is used for the remaining searches. The same steps are # performed for prefix and for exec_prefix, but with different landmarks. # Step 1. Are we running in a virtual environment? Unless 'home' has # been specified another way, check for a pyvenv.cfg and use its 'home' # property to override the executable dir used later for prefix searches. # We do not activate the venv here - that is performed later by site.py. # Step 2. Is there a ._pth file? A ._pth file lives adjacent to the # runtime library (if any) or the actual executable (not the symlink), # and contains precisely the intended contents of sys.path as relative # paths (to its own location). Its presence also enables isolated mode # and suppresses other environment variable usage. Unless already # specified by Py_SetHome(), the directory containing the ._pth file is # set as 'home'. # Step 3. Are we running python out of the build directory? This is # checked by looking for the BUILDDIR_TXT file, which contains the # relative path to the platlib dir. The executable_dir value is # derived from joining the VPATH preprocessor variable to the # directory containing pybuilddir.txt. If it is not found, the # BUILD_LANDMARK file is found, which is part of the source tree. # prefix is then found by searching up for a file that should only # exist in the source tree, and the stdlib dir is set to prefix/Lib. # Step 4. If 'home' is set, either by Py_SetHome(), ENV_PYTHONHOME, # a pyvenv.cfg file, ._pth file, or by detecting a build directory, it # is assumed to point to prefix and exec_prefix. $PYTHONHOME can be a # single directory, which is used for both, or the prefix and exec_prefix # directories separated by DELIM (colon on POSIX; semicolon on Windows). # Step 5. Try to find prefix and exec_prefix relative to executable_dir, # backtracking up the path until it is exhausted. This is the most common # step to succeed. Note that if prefix and exec_prefix are different, # exec_prefix is more likely to be found; however if exec_prefix is a # subdirectory of prefix, both will be found. # Step 6. Search the directories pointed to by the preprocessor variables # PREFIX and EXEC_PREFIX. These are supplied by the Makefile but can be # passed in as options to the configure script. # That's it! # Well, almost. Once we have determined prefix and exec_prefix, the # preprocessor variable PYTHONPATH is used to construct a path. Each # relative path on PYTHONPATH is prefixed with prefix. Then the directory # containing the shared library modules is appended. The environment # variable $PYTHONPATH is inserted in front of it all. On POSIX, if we are # in a build directory, both prefix and exec_prefix are reset to the # corresponding preprocessor variables (so sys.prefix will reflect the # installation location, even though sys.path points into the build # directory). This seems to make more sense given that currently the only # known use of sys.prefix and sys.exec_prefix is for the ILU installation # process to find the installed Python tree. # An embedding application can use Py_SetPath() to override all of # these automatic path computations. # ****************************************************************************** # PLATFORM CONSTANTS # ****************************************************************************** platlibdir = config.get('platlibdir') or PLATLIBDIR if os_name == 'posix' or os_name == 'darwin': BUILDDIR_TXT = 'pybuilddir.txt' BUILD_LANDMARK = 'Modules/Setup.local' DEFAULT_PROGRAM_NAME = f'python{VERSION_MAJOR}' STDLIB_SUBDIR = f'{platlibdir}/python{VERSION_MAJOR}.{VERSION_MINOR}' STDLIB_LANDMARKS = [f'{STDLIB_SUBDIR}/os.py', f'{STDLIB_SUBDIR}/os.pyc'] PLATSTDLIB_LANDMARK = f'{platlibdir}/python{VERSION_MAJOR}.{VERSION_MINOR}/lib-dynload' BUILDSTDLIB_LANDMARKS = ['Lib/os.py'] VENV_LANDMARK = 'pyvenv.cfg' ZIP_LANDMARK = f'{platlibdir}/python{VERSION_MAJOR}{VERSION_MINOR}.zip' DELIM = ':' SEP = '/' elif os_name == 'nt': BUILDDIR_TXT = 'pybuilddir.txt' BUILD_LANDMARK = f'{VPATH}\\Modules\\Setup.local' DEFAULT_PROGRAM_NAME = f'python' STDLIB_SUBDIR = 'Lib' STDLIB_LANDMARKS = [f'{STDLIB_SUBDIR}\\os.py', f'{STDLIB_SUBDIR}\\os.pyc'] PLATSTDLIB_LANDMARK = f'{platlibdir}' BUILDSTDLIB_LANDMARKS = ['Lib\\os.py'] VENV_LANDMARK = 'pyvenv.cfg' ZIP_LANDMARK = f'python{VERSION_MAJOR}{VERSION_MINOR}{PYDEBUGEXT or ""}.zip' WINREG_KEY = f'SOFTWARE\\Python\\PythonCore\\{PYWINVER}\\PythonPath' DELIM = ';' SEP = '\\' # ****************************************************************************** # HELPER FUNCTIONS (note that we prefer C functions for performance) # ****************************************************************************** def search_up(prefix, *landmarks, test=isfile): while prefix: if any(test(joinpath(prefix, f)) for f in landmarks): return prefix prefix = dirname(prefix) # ****************************************************************************** # READ VARIABLES FROM config # ****************************************************************************** program_name = config.get('program_name') home = config.get('home') executable = config.get('executable') base_executable = config.get('base_executable') prefix = config.get('prefix') exec_prefix = config.get('exec_prefix') base_prefix = config.get('base_prefix') base_exec_prefix = config.get('base_exec_prefix') ENV_PYTHONPATH = config['pythonpath_env'] use_environment = config.get('use_environment', 1) pythonpath = config.get('module_search_paths') pythonpath_was_set = config.get('module_search_paths_set') real_executable_dir = None stdlib_dir = None platstdlib_dir = None # ****************************************************************************** # CALCULATE program_name # ****************************************************************************** program_name_was_set = bool(program_name) if not program_name: try: program_name = config.get('orig_argv', [])[0] except IndexError: pass if not program_name: program_name = DEFAULT_PROGRAM_NAME if EXE_SUFFIX and not hassuffix(program_name, EXE_SUFFIX) and isxfile(program_name + EXE_SUFFIX): program_name = program_name + EXE_SUFFIX # ****************************************************************************** # CALCULATE executable # ****************************************************************************** if py_setpath: # When Py_SetPath has been called, executable defaults to # the real executable path. if not executable: executable = real_executable if not executable and SEP in program_name: # Resolve partial path program_name against current directory executable = abspath(program_name) if not executable: # All platforms default to real_executable if known at this # stage. POSIX does not set this value. executable = real_executable elif os_name == 'darwin': # QUIRK: On macOS we may know the real executable path, but # if our caller has lied to us about it (e.g. most of # test_embed), we need to use their path in order to detect # whether we are in a build tree. This is true even if the # executable path was provided in the config. real_executable = executable if not executable and program_name and ENV_PATH: # Resolve names against PATH. # NOTE: The use_environment value is ignored for this lookup. # To properly isolate, launch Python with a full path. for p in ENV_PATH.split(DELIM): p = joinpath(p, program_name) if isxfile(p): executable = p break if not executable: executable = '' # When we cannot calculate the executable, subsequent searches # look in the current working directory. Here, we emulate that # (the former getpath.c would do it apparently by accident). executable_dir = abspath('.') # Also need to set this fallback in case we are running from a # build directory with an invalid argv0 (i.e. test_sys.test_executable) real_executable_dir = executable_dir if ENV_PYTHONEXECUTABLE or ENV___PYVENV_LAUNCHER__: # If set, these variables imply that we should be using them as # sys.executable and when searching for venvs. However, we should # use the argv0 path for prefix calculation if os_name == 'darwin' and WITH_NEXT_FRAMEWORK: # In a framework build the binary in {sys.exec_prefix}/bin is # a stub executable that execs the real interpreter in an # embedded app bundle. That bundle is an implementation detail # and should not affect base_executable. base_executable = f"{dirname(library)}/bin/python{VERSION_MAJOR}.{VERSION_MINOR}" else: base_executable = executable if not real_executable: real_executable = base_executable #real_executable_dir = dirname(real_executable) executable = ENV_PYTHONEXECUTABLE or ENV___PYVENV_LAUNCHER__ executable_dir = dirname(executable) # ****************************************************************************** # CALCULATE (default) home # ****************************************************************************** # Used later to distinguish between Py_SetPythonHome and other # ways that it may have been set home_was_set = False if home: home_was_set = True elif use_environment and ENV_PYTHONHOME and not py_setpath: home = ENV_PYTHONHOME # ****************************************************************************** # READ pyvenv.cfg # ****************************************************************************** venv_prefix = None # Calling Py_SetPythonHome(), Py_SetPath() or # setting $PYTHONHOME will override venv detection. if not home and not py_setpath: try: # prefix2 is just to avoid calculating dirname again later, # as the path in venv_prefix is the more common case. venv_prefix2 = executable_dir or dirname(executable) venv_prefix = dirname(venv_prefix2) try: # Read pyvenv.cfg from one level above executable pyvenvcfg = readlines(joinpath(venv_prefix, VENV_LANDMARK)) except (FileNotFoundError, PermissionError): # Try the same directory as executable pyvenvcfg = readlines(joinpath(venv_prefix2, VENV_LANDMARK)) venv_prefix = venv_prefix2 except (FileNotFoundError, PermissionError): venv_prefix = None pyvenvcfg = [] for line in pyvenvcfg: key, had_equ, value = line.partition('=') if had_equ and key.strip().lower() == 'home': executable_dir = real_executable_dir = value.strip() if not base_executable: # First try to resolve symlinked executables, since that may be # more accurate than assuming the executable in 'home'. try: base_executable = realpath(executable) if base_executable == executable: # No change, so probably not a link. Clear it and fall back base_executable = '' except OSError: pass if not base_executable: base_executable = joinpath(executable_dir, basename(executable)) break else: venv_prefix = None # ****************************************************************************** # CALCULATE base_executable, real_executable AND executable_dir # ****************************************************************************** if not base_executable: base_executable = executable or real_executable or '' if not real_executable: real_executable = base_executable try: real_executable = realpath(real_executable) except OSError as ex: # Only warn if the file actually exists and was unresolvable # Otherwise users who specify a fake executable may get spurious warnings. if isfile(real_executable): warn(f'Failed to find real location of {base_executable}') if not executable_dir and os_name == 'darwin' and library: # QUIRK: macOS checks adjacent to its library early library_dir = dirname(library) if any(isfile(joinpath(library_dir, p)) for p in STDLIB_LANDMARKS): # Exceptions here should abort the whole process (to match # previous behavior) executable_dir = realpath(library_dir) real_executable_dir = executable_dir # If we do not have the executable's directory, we can calculate it. # This is the directory used to find prefix/exec_prefix if necessary. if not executable_dir: executable_dir = real_executable_dir = dirname(real_executable) # If we do not have the real executable's directory, we calculate it. # This is the directory used to detect build layouts. if not real_executable_dir: real_executable_dir = dirname(real_executable) # ****************************************************************************** # DETECT _pth FILE # ****************************************************************************** # The contents of an optional ._pth file are used to totally override # sys.path calculation. Its presence also implies isolated mode and # no-site (unless explicitly requested) pth = None pth_dir = None # Calling Py_SetPythonHome() or Py_SetPath() will override ._pth search, # but environment variables and command-line options cannot. if not py_setpath and not home_was_set: # 1. Check adjacent to the main DLL/dylib/so (if set) # 2. Check adjacent to the original executable # 3. Check adjacent to our actual executable # This may allow a venv to override the base_executable's # ._pth file, but it cannot override the library's one. for p in [library, executable, real_executable]: if p: if os_name == 'nt' and (hassuffix(p, 'exe') or hassuffix(p, 'dll')): p = p.rpartition('.')[0] p += '._pth' try: pth = readlines(p) pth_dir = dirname(p) break except OSError: pass # If we found a ._pth file, disable environment and home # detection now. Later, we will do the rest. if pth_dir: use_environment = 0 home = pth_dir pythonpath = [] # ****************************************************************************** # CHECK FOR BUILD DIRECTORY # ****************************************************************************** build_prefix = None if ((not home_was_set and real_executable_dir and not py_setpath) or config.get('_is_python_build', 0) > 0): # Detect a build marker and use it to infer prefix, exec_prefix, # stdlib_dir and the platstdlib_dir directories. try: platstdlib_dir = joinpath( real_executable_dir, readlines(joinpath(real_executable_dir, BUILDDIR_TXT))[0], ) build_prefix = joinpath(real_executable_dir, VPATH) except IndexError: # File exists but is empty platstdlib_dir = real_executable_dir build_prefix = joinpath(real_executable_dir, VPATH) except (FileNotFoundError, PermissionError): if isfile(joinpath(real_executable_dir, BUILD_LANDMARK)): build_prefix = joinpath(real_executable_dir, VPATH) if os_name == 'nt': # QUIRK: Windows builds need platstdlib_dir to be the executable # dir. Normally the builddir marker handles this, but in this # case we need to correct manually. platstdlib_dir = real_executable_dir if build_prefix: if os_name == 'nt': # QUIRK: No searching for more landmarks on Windows build_stdlib_prefix = build_prefix else: build_stdlib_prefix = search_up(build_prefix, *BUILDSTDLIB_LANDMARKS) # Always use the build prefix for stdlib if build_stdlib_prefix: stdlib_dir = joinpath(build_stdlib_prefix, 'Lib') else: stdlib_dir = joinpath(build_prefix, 'Lib') # Only use the build prefix for prefix if it hasn't already been set if not prefix: prefix = build_stdlib_prefix # Do not warn, because 'prefix' never equals 'build_prefix' on POSIX #elif not venv_prefix and prefix != build_prefix: # warn('Detected development environment but prefix is already set') if not exec_prefix: exec_prefix = build_prefix # Do not warn, because 'exec_prefix' never equals 'build_prefix' on POSIX #elif not venv_prefix and exec_prefix != build_prefix: # warn('Detected development environment but exec_prefix is already set') config['_is_python_build'] = 1 # ****************************************************************************** # CALCULATE prefix AND exec_prefix # ****************************************************************************** if py_setpath: # As documented, calling Py_SetPath will force both prefix # and exec_prefix to the empty string. prefix = exec_prefix = '' else: # Read prefix and exec_prefix from explicitly set home if home: # When multiple paths are listed with ':' or ';' delimiters, # split into prefix:exec_prefix prefix, had_delim, exec_prefix = home.partition(DELIM) if not had_delim: exec_prefix = prefix # Reset the standard library directory if it was already set stdlib_dir = None # First try to detect prefix by looking alongside our runtime library, if known if library and not prefix: library_dir = dirname(library) if ZIP_LANDMARK: if os_name == 'nt': # QUIRK: Windows does not search up for ZIP file if isfile(joinpath(library_dir, ZIP_LANDMARK)): prefix = library_dir else: prefix = search_up(library_dir, ZIP_LANDMARK) if STDLIB_SUBDIR and STDLIB_LANDMARKS and not prefix: if any(isfile(joinpath(library_dir, f)) for f in STDLIB_LANDMARKS): prefix = library_dir stdlib_dir = joinpath(prefix, STDLIB_SUBDIR) # Detect prefix by looking for zip file if ZIP_LANDMARK and executable_dir and not prefix: if os_name == 'nt': # QUIRK: Windows does not search up for ZIP file if isfile(joinpath(executable_dir, ZIP_LANDMARK)): prefix = executable_dir else: prefix = search_up(executable_dir, ZIP_LANDMARK) if prefix: stdlib_dir = joinpath(prefix, STDLIB_SUBDIR) if not isdir(stdlib_dir): stdlib_dir = None # Detect prefix by searching from our executable location for the stdlib_dir if STDLIB_SUBDIR and STDLIB_LANDMARKS and executable_dir and not prefix: prefix = search_up(executable_dir, *STDLIB_LANDMARKS) if prefix: stdlib_dir = joinpath(prefix, STDLIB_SUBDIR) if PREFIX and not prefix: prefix = PREFIX if not any(isfile(joinpath(prefix, f)) for f in STDLIB_LANDMARKS): warn('Could not find platform independent libraries ') if not prefix: prefix = abspath('') warn('Could not find platform independent libraries ') # Detect exec_prefix by searching from executable for the platstdlib_dir if PLATSTDLIB_LANDMARK and not exec_prefix: if executable_dir: if os_name == 'nt': # QUIRK: For compatibility and security, do not search for DLLs # directory. The fallback below will cover it exec_prefix = executable_dir else: exec_prefix = search_up(executable_dir, PLATSTDLIB_LANDMARK, test=isdir) if not exec_prefix and EXEC_PREFIX: exec_prefix = EXEC_PREFIX if not exec_prefix or not isdir(joinpath(exec_prefix, PLATSTDLIB_LANDMARK)): if os_name == 'nt': # QUIRK: If DLLs is missing on Windows, don't warn, just assume # that it's all the same as prefix. # gh-98790: We set platstdlib_dir here to avoid adding "DLLs" into # sys.path when it doesn't exist, which would give site-packages # precedence over executable_dir, which is *probably* where our PYDs # live. Ideally, whoever changes our layout will tell us what the # layout is, but in the past this worked, so it should keep working. platstdlib_dir = exec_prefix = prefix else: warn('Could not find platform dependent libraries ') # Fallback: assume exec_prefix == prefix if not exec_prefix: exec_prefix = prefix if not prefix or not exec_prefix: warn('Consider setting $PYTHONHOME to [:]') # If we haven't set [plat]stdlib_dir already, set them now if not stdlib_dir: if prefix: stdlib_dir = joinpath(prefix, STDLIB_SUBDIR) else: stdlib_dir = '' if not platstdlib_dir: if exec_prefix: platstdlib_dir = joinpath(exec_prefix, PLATSTDLIB_LANDMARK) else: platstdlib_dir = '' # For a venv, update the main prefix/exec_prefix but leave the base ones unchanged # XXX: We currently do not update prefix here, but it happens in site.py #if venv_prefix: # base_prefix = prefix # base_exec_prefix = exec_prefix # prefix = exec_prefix = venv_prefix # ****************************************************************************** # UPDATE pythonpath (sys.path) # ****************************************************************************** if py_setpath: # If Py_SetPath was called then it overrides any existing search path config['module_search_paths'] = py_setpath.split(DELIM) config['module_search_paths_set'] = 1 elif not pythonpath_was_set: # If pythonpath was already explicitly set or calculated, we leave it alone. # This won't matter in normal use, but if an embedded host is trying to # recalculate paths while running then we do not want to change it. pythonpath = [] # First add entries from the process environment if use_environment and ENV_PYTHONPATH: for p in ENV_PYTHONPATH.split(DELIM): pythonpath.append(abspath(p)) # Then add the default zip file if os_name == 'nt': # QUIRK: Windows uses the library directory rather than the prefix if library: library_dir = dirname(library) else: library_dir = executable_dir pythonpath.append(joinpath(library_dir, ZIP_LANDMARK)) elif build_prefix or venv_prefix: # QUIRK: POSIX uses the default prefix when in the build directory # or a venv pythonpath.append(joinpath(PREFIX, ZIP_LANDMARK)) else: pythonpath.append(joinpath(prefix, ZIP_LANDMARK)) if os_name == 'nt' and use_environment and winreg: # QUIRK: Windows also lists paths in the registry. Paths are stored # as the default value of each subkey of # {HKCU,HKLM}\Software\Python\PythonCore\{winver}\PythonPath # where winver is sys.winver (typically '3.x' or '3.x-32') for hk in (winreg.HKEY_CURRENT_USER, winreg.HKEY_LOCAL_MACHINE): try: key = winreg.OpenKeyEx(hk, WINREG_KEY) try: i = 0 while True: try: v = winreg.QueryValue(key, winreg.EnumKey(key, i)) except OSError: break if isinstance(v, str): pythonpath.append(v) i += 1 finally: winreg.CloseKey(key) except OSError: pass # Then add any entries compiled into the PYTHONPATH macro. if PYTHONPATH: for p in PYTHONPATH.split(DELIM): pythonpath.append(joinpath(prefix, p)) # Then add stdlib_dir and platstdlib_dir if os_name == 'nt' and venv_prefix: # QUIRK: Windows generates paths differently in a venv if platstdlib_dir: pythonpath.append(platstdlib_dir) if stdlib_dir: pythonpath.append(stdlib_dir) if executable_dir not in pythonpath: pythonpath.append(executable_dir) else: if stdlib_dir: pythonpath.append(stdlib_dir) if platstdlib_dir: pythonpath.append(platstdlib_dir) config['module_search_paths'] = pythonpath config['module_search_paths_set'] = 1 # ****************************************************************************** # POSIX prefix/exec_prefix QUIRKS # ****************************************************************************** # QUIRK: Non-Windows replaces prefix/exec_prefix with defaults when running # in build directory. This happens after pythonpath calculation. if os_name != 'nt' and build_prefix: prefix = config.get('prefix') or PREFIX exec_prefix = config.get('exec_prefix') or EXEC_PREFIX or prefix # ****************************************************************************** # SET pythonpath FROM _PTH FILE # ****************************************************************************** if pth: config['isolated'] = 1 config['use_environment'] = 0 config['site_import'] = 0 config['safe_path'] = 1 pythonpath = [] for line in pth: line = line.partition('#')[0].strip() if not line: pass elif line == 'import site': config['site_import'] = 1 elif line.startswith('import '): warn("unsupported 'import' line in ._pth file") else: pythonpath.append(joinpath(pth_dir, line)) config['module_search_paths'] = pythonpath config['module_search_paths_set'] = 1 # ****************************************************************************** # UPDATE config FROM CALCULATED VALUES # ****************************************************************************** config['program_name'] = program_name config['home'] = home config['executable'] = executable config['base_executable'] = base_executable config['prefix'] = prefix config['exec_prefix'] = exec_prefix config['base_prefix'] = base_prefix or prefix config['base_exec_prefix'] = base_exec_prefix or exec_prefix config['platlibdir'] = platlibdir config['stdlib_dir'] = stdlib_dir config['platstdlib_dir'] = platstdlib_dir