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3f460fb3e9
wting_autojump/bin/autojump
William Ting 3f460fb3e9 Add Python 2.6 support back. 
Closes #242.
2014-01-07 09:56:30 -06:00

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Copyright © 2008-2012 Joel Schaerer
Copyright © 2012-2014 William Ting
* This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
* This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""
from __future__ import print_function
from difflib import SequenceMatcher
from itertools import chain
from math import sqrt
from operator import attrgetter
from operator import itemgetter
import os
import re
import sys
if sys.version_info[0] == 3:
ifilter = filter
imap = map
os.getcwdu = os.getcwd
else:
from itertools import ifilter
from itertools import imap
from autojump_argparse import ArgumentParser
from autojump_data import dictify
from autojump_data import entriefy
from autojump_data import Entry
from autojump_data import load
from autojump_data import save
from autojump_utils import decode
from autojump_utils import encode_local
from autojump_utils import first
from autojump_utils import get_tab_entry_info
from autojump_utils import get_pwd
from autojump_utils import has_uppercase
from autojump_utils import is_osx
from autojump_utils import last
from autojump_utils import print_entry
from autojump_utils import print_tab_menu
from autojump_utils import sanitize
from autojump_utils import take
VERSION = '22.0.0-alpha'
FUZZY_MATCH_THRESHOLD = 0.6
TAB_ENTRIES_COUNT = 9
TAB_SEPARATOR = '__'
def set_defaults():
config = {}
if is_osx():
data_home = os.path.join(
os.path.expanduser('~'),
'Library',
'autojump')
else:
data_home = os.getenv(
'XDG_DATA_HOME',
os.path.join(
os.path.expanduser('~'),
'.local',
'share',
'autojump'))
config['data_path'] = os.path.join(data_home, 'autojump.txt')
config['backup_path'] = os.path.join(data_home, 'autojump.txt.bak')
config['tmp_path'] = os.path.join(data_home, 'data.tmp')
return config
def parse_arguments():
parser = ArgumentParser(
description='Automatically jump to directory passed as an \
argument.',
epilog="Please see autojump(1) man pages for full documentation.")
parser.add_argument(
'directory', metavar='DIRECTORY', nargs='*', default='',
help='directory to jump to')
parser.add_argument(
'-a', '--add', metavar='DIRECTORY',
help='add path')
parser.add_argument(
'-i', '--increase', metavar='WEIGHT', nargs='?', type=int,
const=10, default=False,
help='increase current directory weight')
parser.add_argument(
'-d', '--decrease', metavar='WEIGHT', nargs='?', type=int,
const=15, default=False,
help='decrease current directory weight')
parser.add_argument(
'--complete', action="store_true", default=False,
help='used for tab completion')
parser.add_argument(
'--purge', action="store_true", default=False,
help='remove non-existent paths from database')
parser.add_argument(
'-s', '--stat', action="store_true", default=False,
help='show database entries and their key weights')
parser.add_argument(
'-v', '--version', action="version", version="%(prog)s v" +
VERSION, help='show version information')
return parser.parse_args()
def add_path(data, path, weight=10):
"""
Add a new path or increment an existing one.
os.path.realpath() is not used because it's preferable to use symlinks
with resulting duplicate entries in the database than a single canonical
path.
"""
path = decode(path).rstrip(os.sep)
if path == os.path.expanduser('~'):
return data, Entry(path, 0)
data[path] = sqrt((data.get(path, 0) ** 2) + (weight ** 2))
return data, Entry(path, data[path])
def decrease_path(data, path, weight=15):
"""Decrease or zero out a path."""
path = decode(path).rstrip(os.sep)
data[path] = max(0, data.get(path, 0) - weight)
return data, Entry(path, data[path])
def detect_smartcase(needles):
"""
If any needles contain an uppercase letter then use case sensitive
searching. Otherwise use case insensitive searching.
"""
return not any(imap(has_uppercase, needles))
def find_matches(entries, needles):
"""Return an iterator to matching entries."""
try:
not_cwd = lambda entry: entry.path != os.getcwdu()
except OSError:
# tautology if current working directory no longer exists
not_cwd = lambda x: True
data = sorted(
ifilter(not_cwd, entries),
key=attrgetter('weight'),
reverse=True)
ignore_case = detect_smartcase(needles)
exists = lambda entry: os.path.exists(entry.path)
return ifilter(
exists,
chain(
match_consecutive(needles, data, ignore_case),
match_fuzzy(needles, data, ignore_case),
match_anywhere(needles, data, ignore_case),
# default return value so calling shell functions have an
# argument to `cd` to
[Entry('.', 0)]))
def handle_tab_completion(needle, entries):
if not needle:
sys.exit(0)
tab_needle, tab_index, tab_path = get_tab_entry_info(needle, TAB_SEPARATOR)
if tab_path:
print(encode_local(tab_path))
elif tab_index:
get_ith_path = lambda i, iterable: last(take(i, iterable)).path
print(encode_local(
get_ith_path(tab_index, find_matches(entries, tab_needle))))
elif tab_needle:
# found partial tab completion entry
print_tab_menu(
tab_needle,
take(TAB_ENTRIES_COUNT, find_matches(entries, tab_needle)),
TAB_SEPARATOR)
else:
print_tab_menu(
needle,
take(TAB_ENTRIES_COUNT, find_matches(entries, needle)),
TAB_SEPARATOR)
def match_anywhere(needles, haystack, ignore_case=False):
"""
Matches needles anywhere in the path as long as they're in the same (but
not necessary consecutive) order.
For example:
needles = ['foo', 'baz']
regex needle = r'.*foo.*baz.*'
haystack = [
(path="/foo/bar/baz", weight=10),
(path="/baz/foo/bar", weight=10),
(path="/foo/baz", weight=10)]
result = [
(path="/moo/foo/baz", weight=10),
(path="/foo/baz", weight=10)]
"""
regex_needle = '.*' + '.*'.join(needles) + '.*'
regex_flags = re.IGNORECASE | re.UNICODE if ignore_case else re.UNICODE
found = lambda haystack: re.search(
regex_needle,
haystack.path,
flags=regex_flags)
return ifilter(found, haystack)
def match_consecutive(needles, haystack, ignore_case=False):
"""
Matches consecutive needles at the end of a path.
For example:
needles = ['foo', 'baz']
haystack = [
(path="/foo/bar/baz", weight=10),
(path="/foo/baz/moo", weight=10),
(path="/moo/foo/baz", weight=10),
(path="/foo/baz", weight=10)]
regex_needle = re.compile(r'''
foo # needle #1
[^/]* # all characters except os.sep zero or more times
/ # os.sep
[^/]* # all characters except os.sep zero or more times
baz # needle #2
[^/]* # all characters except os.sep zero or more times
$ # end of string
''')
result = [
(path="/moo/foo/baz", weight=10),
(path="/foo/baz", weight=10)]
"""
regex_no_sep = '[^' + os.sep + ']*'
regex_one_sep = regex_no_sep + os.sep + regex_no_sep
regex_no_sep_end = regex_no_sep + '$'
# can't use compiled regex because of flags
regex_needle = regex_one_sep.join(needles) + regex_no_sep_end
regex_flags = re.IGNORECASE | re.UNICODE if ignore_case else re.UNICODE
found = lambda entry: re.search(
regex_needle,
entry.path,
flags=regex_flags)
return ifilter(found, haystack)
def match_fuzzy(needles, haystack, ignore_case=False):
"""
Performs an approximate match with the last needle against the end of
every path past an acceptable threshold (FUZZY_MATCH_THRESHOLD).
For example:
needles = ['foo', 'bar']
haystack = [
(path="/foo/bar/baz", weight=11),
(path="/foo/baz/moo", weight=10),
(path="/moo/foo/baz", weight=10),
(path="/foo/baz", weight=10),
(path="/foo/bar", weight=10)]
result = [
(path="/foo/bar/baz", weight=11),
(path="/moo/foo/baz", weight=10),
(path="/foo/baz", weight=10),
(path="/foo/bar", weight=10)]
This is a weak heuristic and used as a last resort to find matches.
"""
end_dir = lambda path: last(os.path.split(path))
if ignore_case:
needle = last(needles).lower()
match_percent = lambda entry: SequenceMatcher(
a=needle,
b=end_dir(entry.path.lower())).ratio()
else:
needle = last(needles)
match_percent = lambda entry: SequenceMatcher(
a=needle,
b=end_dir(entry.path)).ratio()
meets_threshold = lambda entry: match_percent(entry) >= \
FUZZY_MATCH_THRESHOLD
return ifilter(meets_threshold, haystack)
def purge_missing_paths(entries):
"""Remove non-existent paths from a list of entries."""
exists = lambda entry: os.path.exists(entry.path)
return ifilter(exists, entries)
def print_stats(data, data_path):
for path, weight in sorted(data.items(), key=itemgetter(1)):
print_entry(Entry(path, weight))
print("________________________________________\n")
print("%d:\t total weight" % sum(data.values()))
print("%d:\t number of entries" % len(data))
try:
print("%.2f:\t current directory weight" % data.get(os.getcwdu(), 0))
except OSError:
# current directory no longer exists
pass
print("\ndata:\t %s" % data_path)
def main(args): # noqa
config = set_defaults()
# all arguments are mutually exclusive
if args.add:
save(config, first(add_path(load(config), args.add)))
elif args.complete:
handle_tab_completion(
needle=first(sanitize(args.directory)),
entries=entriefy(load(config)))
elif args.decrease:
data, entry = decrease_path(load(config), get_pwd(), args.decrease)
save(config, data)
print_entry(entry)
elif args.increase:
data, entry = add_path(load(config), get_pwd(), args.increase)
save(config, data)
print_entry(entry)
elif args.purge:
old_data = load(config)
new_data = dictify(purge_missing_paths(entriefy(old_data)))
save(config, new_data)
print("Purged %d entries." % (len(old_data) - len(new_data)))
elif args.stat:
print_stats(load(config), config['data_path'])
elif not args.directory:
# default return value so calling shell functions have an argument
# to `cd` to
print(encode_local('.'))
else:
entries = entriefy(load(config))
needles = sanitize(args.directory)
tab_needle, tab_index, tab_path = \
get_tab_entry_info(first(needles), TAB_SEPARATOR)
if tab_path:
print(encode_local(tab_path))
elif tab_index:
get_ith_path = lambda i, iterable: last(take(i, iterable)).path
print(encode_local(
get_ith_path(tab_index, find_matches(entries, tab_needle))))
else:
print(encode_local(first(find_matches(entries, needles)).path))
return 0
if __name__ == "__main__":
sys.exit(main(parse_arguments()))
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