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py3.4 executables_in() performance

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This commit is contained in:
Anthony Scopatz 2016-05-25 11:54:56 -04:00
parent 97f9766e62
commit f1d1bc3e8f
1 changed files with 11 additions and 3 deletions
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14
xonsh/tools.py
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@ -33,7 +33,8 @@ from collections import OrderedDict, Sequence, Set
# adding further imports from xonsh modules is discouraged to avoid cirular
# dependencies
from xonsh.platform import (has_prompt_toolkit, scandir, win_unicode_console,
DEFAULT_ENCODING, ON_LINUX, ON_WINDOWS)
DEFAULT_ENCODING, ON_LINUX, ON_WINDOWS,
PYTHON_VERSION_INFO)
if has_prompt_toolkit():
import prompt_toolkit
else:
@ -287,8 +288,15 @@ class redirect_stderr(_RedirectStream):
def executables_in(path):
"""Returns a generator of files in `path` that the user could execute. """
return (x.name for x in scandir(path)
if x.is_file() and os.access(x.path, os.X_OK))
if PYTHON_VERSION_INFO < (3, 5, 0):
for i in os.listdir(path):
name = os.path.join(path, i)
if (os.path.exists(name) and os.access(name, os.X_OK) and \
(not os.path.isdir(name))):
yield i
else:
return (x.name for x in scandir(path)
if x.is_file() and os.access(x.path, os.X_OK))
def command_not_found(cmd):