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# This file is part of ranger, the console file manager.
# License: GNU GPL version 3, see the file "AUTHORS" for details.
from __future__ import (absolute_import, division, print_function)
from stat import S_IXOTH, S_IFREG
from os import listdir, environ, stat
import shlex
from ranger.ext.iter_tools import unique
_cached_executables = None # pylint: disable=invalid-name
def get_executables():
"""Return all executable files in $PATH. Cached version."""
global _cached_executables # pylint: disable=global-statement,invalid-name
if _cached_executables is None:
_cached_executables = get_executables_uncached()
return _cached_executables
def get_executables_uncached(*paths):
"""Return all executable files in each of the given directories.
Looks in $PATH by default.
"""
if not paths:
try:
pathstring = environ['PATH']
except KeyError:
return ()
paths = unique(pathstring.split(':'))
executables = set()
for path in paths:
try:
content = listdir(path)
except OSError:
continue
for item in content:
abspath = path + '/' + item
try:
filestat = stat(abspath)
except OSError:
continue
if filestat.st_mode & (S_IXOTH | S_IFREG):
executables.add(item)
return executables
def get_term():
"""Get the user terminal executable name.
Either $TERMCMD, $TERM, "x-terminal-emulator" or "xterm", in this order.
"""
command = environ.get('TERMCMD', environ.get('TERM'))
if shlex.split(command)[0] not in get_executables():
command = 'x-terminal-emulator'
if command not in get_executables():
command = 'xterm'
return command
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