105 lines
3.6 KiB
Python
105 lines
3.6 KiB
Python
|
|
"""allow bash-completion for argparse with argcomplete if installed
|
|
needs argcomplete>=0.5.6 for python 3.2/3.3 (older versions fail
|
|
to find the magic string, so _ARGCOMPLETE env. var is never set, and
|
|
this does not need special code.
|
|
|
|
argcomplete does not support python 2.5 (although the changes for that
|
|
are minor).
|
|
|
|
Function try_argcomplete(parser) should be called directly before
|
|
the call to ArgumentParser.parse_args().
|
|
|
|
The filescompleter is what you normally would use on the positional
|
|
arguments specification, in order to get "dirname/" after "dirn<TAB>"
|
|
instead of the default "dirname ":
|
|
|
|
optparser.add_argument(Config._file_or_dir, nargs='*'
|
|
).completer=filescompleter
|
|
|
|
Other, application specific, completers should go in the file
|
|
doing the add_argument calls as they need to be specified as .completer
|
|
attributes as well. (If argcomplete is not installed, the function the
|
|
attribute points to will not be used).
|
|
|
|
SPEEDUP
|
|
=======
|
|
The generic argcomplete script for bash-completion
|
|
(/etc/bash_completion.d/python-argcomplete.sh )
|
|
uses a python program to determine startup script generated by pip.
|
|
You can speed up completion somewhat by changing this script to include
|
|
# PYTHON_ARGCOMPLETE_OK
|
|
so the the python-argcomplete-check-easy-install-script does not
|
|
need to be called to find the entry point of the code and see if that is
|
|
marked with PYTHON_ARGCOMPLETE_OK
|
|
|
|
INSTALL/DEBUGGING
|
|
=================
|
|
To include this support in another application that has setup.py generated
|
|
scripts:
|
|
- add the line:
|
|
# PYTHON_ARGCOMPLETE_OK
|
|
near the top of the main python entry point
|
|
- include in the file calling parse_args():
|
|
from _argcomplete import try_argcomplete, filescompleter
|
|
, call try_argcomplete just before parse_args(), and optionally add
|
|
filescompleter to the positional arguments' add_argument()
|
|
If things do not work right away:
|
|
- switch on argcomplete debugging with (also helpful when doing custom
|
|
completers):
|
|
export _ARC_DEBUG=1
|
|
- run:
|
|
python-argcomplete-check-easy-install-script $(which appname)
|
|
echo $?
|
|
will echo 0 if the magic line has been found, 1 if not
|
|
- sometimes it helps to find early on errors using:
|
|
_ARGCOMPLETE=1 _ARC_DEBUG=1 appname
|
|
which should throw a KeyError: 'COMPLINE' (which is properly set by the
|
|
global argcomplete script).
|
|
"""
|
|
from __future__ import absolute_import, division, print_function
|
|
import sys
|
|
import os
|
|
from glob import glob
|
|
|
|
|
|
class FastFilesCompleter:
|
|
'Fast file completer class'
|
|
|
|
def __init__(self, directories=True):
|
|
self.directories = directories
|
|
|
|
def __call__(self, prefix, **kwargs):
|
|
"""only called on non option completions"""
|
|
if os.path.sep in prefix[1:]:
|
|
prefix_dir = len(os.path.dirname(prefix) + os.path.sep)
|
|
else:
|
|
prefix_dir = 0
|
|
completion = []
|
|
globbed = []
|
|
if '*' not in prefix and '?' not in prefix:
|
|
if prefix[-1] == os.path.sep: # we are on unix, otherwise no bash
|
|
globbed.extend(glob(prefix + '.*'))
|
|
prefix += '*'
|
|
globbed.extend(glob(prefix))
|
|
for x in sorted(globbed):
|
|
if os.path.isdir(x):
|
|
x += '/'
|
|
# append stripping the prefix (like bash, not like compgen)
|
|
completion.append(x[prefix_dir:])
|
|
return completion
|
|
|
|
|
|
if os.environ.get('_ARGCOMPLETE'):
|
|
try:
|
|
import argcomplete.completers
|
|
except ImportError:
|
|
sys.exit(-1)
|
|
filescompleter = FastFilesCompleter()
|
|
|
|
def try_argcomplete(parser):
|
|
argcomplete.autocomplete(parser)
|
|
else:
|
|
def try_argcomplete(parser): pass
|
|
filescompleter = None
|