def filename_args(args, on_error=_default_on_error):
"""
Return list of filenames given command-line arguments.
@rtype:
C{list} of L{Filename}
"""
if args:
return expand_py_files_from_args(args, on_error)
elif not os.isatty(0):
return [Filename.STDIN]
else:
syntax()
def _get_python_path(env_var_name, default_path, target_dirname):
'''
Expand an environment variable specifying pyflyby input config files.
- Default to C{default_path} if the environment variable is undefined.
- Process colon delimiters.
- Replace "-" with C{default_path}.
- Expand triple dots.
- Recursively traverse directories.
@rtype:
C{tuple} of C{Filename}s
'''
pathnames = _get_env_var(env_var_name, default_path)
if pathnames == ["EMPTY"]:
# The special code PYFLYBY_PATH=EMPTY means we intentionally want to
# use an empty PYFLYBY_PATH (and don't fall back to the default path,
# nor warn about an empty path).
return ()
for p in pathnames:
if re.match("/|[.]/|[.][.][.]/|~/", p):
continue
raise ValueError(
"{env_var_name} components should start with / or ./ or ~/ or .../. "
"Use {env_var_name}=./{p} instead of {env_var_name}={p} if you really "
"want to use the current directory.".format(
env_var_name=env_var_name, p=p))
pathnames = [os.path.expanduser(p) for p in pathnames]
pathnames = _expand_tripledots(pathnames, target_dirname)
pathnames = [Filename(fn) for fn in pathnames]
pathnames = stable_unique(pathnames)
pathnames = expand_py_files_from_args(pathnames)
if not pathnames:
logger.warning(
"No import libraries found (%s=%r, default=%r)" %
(env_var_name, os.environ.get(env_var_name), default_path))
return tuple(pathnames)
