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#!/usr/bin/env python
"""Copyright Joel Schaerer 2008-2010
This file is part of autojump
autojump 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 of the License, or
(at your option) any later version.
autojump 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 autojump. If not, see <http://www.gnu.org/licenses/>.
Autojump is a small tool that maintains a database of your most
used directories, and finds the best match to help you jump to
frequently used places."""
from __future__ import division, print_function
import getopt
from sys import argv, stderr, version_info, exit, getfilesystemencoding
from tempfile import NamedTemporaryFile
from operator import itemgetter
import os
import shutil
AUTOJUMP_VERSION = "release-v19"
MAX_KEYWEIGHT = 1000
MAX_STORED_PATHS = 600
COMPLETION_SEPARATOR = '__'
if "AUTOJUMP_DATA_DIR" in os.environ:
CONFIG_DIR = os.environ.get("AUTOJUMP_DATA_DIR")
else:
xdg_data_dir = os.environ.get('XDG_DATA_HOME') or os.path.join(os.environ['HOME'], '.local', 'share')
CONFIG_DIR=os.path.join(xdg_data_dir, 'autojump')
def uniqadd(collection, key):
"""Adds a key to a list only if it is not already present"""
if key not in collection:
collection.append(key)
def dicadd(dic, key, increment=1):
"""Increment a value in a dic, set it to 0
if is is not already present"""
dic[key] = dic.get(key, 0.)+increment
def output(unicode_text,encoding=None):
"""Wrapper for the print function, using the filesystem encoding by default
to minimize encoding mismatch problems in directory names"""
if version_info[0] > 2:
print(unicode_text)
else:
if encoding is None:
encoding = getfilesystemencoding()
print(unicode_text.encode(encoding))
def decode(text,encoding=None,errors="strict"):
"""Decoding step for python2.x which does not default to unicode"""
if version_info[0] > 2:
return text
else:
if encoding is None:
encoding = getfilesystemencoding()
return text.decode(encoding,errors)
def unico(text):
"""if python2, convert to a unicode object"""
if version_info[0] > 2:
return text
else:
return unicode(text)
def save(path_dict, dic_file):
"""Save the database in an atomic way, and preserve
a backup file."""
# If the dic_file exists and os supports permissions, check that dic_file belongs to us
# Otherwise, fail quietly
if (not os.path.exists(dic_file)) or os.name == 'nt' or os.getuid() == os.stat(dic_file)[4]:
temp = NamedTemporaryFile(dir=CONFIG_DIR, delete=False)
for path,weight in sorted(path_dict.items(),key=itemgetter(1),reverse=True):
# the db is stored in utf-8
temp.write((unico("%s\t%s\n")%(weight,path)).encode("utf-8"))
# Catching disk errors and skipping save since file handle can't be closed.
try:
#cf. http://thunk.org/tytso/blog/2009/03/15/dont-fear-the-fsync/
temp.flush()
os.fsync(temp)
temp.close()
except IOError as ex:
print("Error while saving autojump database (disk full?)" %
ex, file=stderr)
return
# Use shutil.move instead of os.rename because windows doesn't support
# using rename to overwrite files
shutil.move(temp.name, dic_file)
try: #backup file
import time
if (not os.path.exists(dic_file+".bak") or
time.time()-os.path.getmtime(dic_file+".bak")>86400):
shutil.copy(dic_file, dic_file+".bak")
except OSError as ex:
print("Error while creating backup autojump file. (%s)" %
ex, file=stderr)
def open_dic(dic_file, error_recovery=False):
"""Try hard to open the database file, recovering
from backup if needed. """
try:
path_dict = {}
with open(dic_file, 'r') as aj_file:
for l in aj_file.readlines():
weight,path = l[:-1].split("\t",1)
# the db is stored in utf-8
path = decode(path,"utf-8")
path_dict[path] = float(weight)
return path_dict
except (IOError, EOFError):
if not error_recovery and os.path.exists(dic_file+".bak"):
print('Problem with autojump database,\
trying to recover from backup...', file=stderr)
shutil.copy(dic_file+".bak", dic_file)
return open_dic(dic_file, True)
else:
# Temporary migration code
old_dic_file = get_dic_file("autojump_py")
if os.path.exists(old_dic_file):
try: # fix to get optimised pickle in python < 3
import cPickle as pickle
except ImportError:
import pickle
try:
with open(old_dic_file, 'rb') as aj_file:
if version_info[0] > 2:
#encoding is only specified for python2.x compatibility
path_dict = pickle.load(aj_file, encoding="utf-8")
else:
path_dict = pickle.load(aj_file)
unicode_dict = {} #we now use unicode internally
for k,v in path_dict.items():
print(k)
unicode_dict[decode(k,errors="replace")] = v
return unicode_dict
except (IOError, EOFError, pickle.UnpicklingError):
pass
return {} #if everything fails, return an empty file
def forget(path_dict, dic_file):
"""Gradually forget about directories. Only call
from the actual jump since it can take time"""
keyweight = sum(path_dict.values())
if keyweight > MAX_KEYWEIGHT:
for k in path_dict.keys():
path_dict[k] *= 0.9 * MAX_KEYWEIGHT / keyweight
save(path_dict, dic_file)
def clean_dict(sorted_dirs, path_dict):
"""Limits the sized of the path_dict to MAX_STORED_PATHS.
Returns True if keys were deleted"""
if len(sorted_dirs) > MAX_STORED_PATHS:
#remove 25 more than needed, to avoid doing it every time
for path, dummy in sorted_dirs[MAX_STORED_PATHS-25:]:
del path_dict[path]
return True
else: return False
def match(path, pattern, ignore_case=False, only_end=False):
"""Check whether a path matches a particular pattern, and return
the remaning part of the string"""
if only_end:
match_string = "/".join(path.split('/')[-1-pattern.count('/'):])
else:
match_string = path
if ignore_case:
find_idx = match_string.lower().find(pattern.lower())
else:
find_idx = match_string.find(pattern)
does_match = (find_idx != -1)
# Eat the path to avoid two patterns matching the same part of the string
if does_match:
eaten_path = path[find_idx+len(pattern):]
else:
eaten_path = path
return (does_match, eaten_path)
def find_matches(dirs, patterns, result_list, ignore_case, max_matches, current_dir):
"""Find max_matches paths that match the pattern,
and add them to the result_list"""
for path, count in dirs:
# Don't jump to where we alread are
if current_dir == path :
continue
does_match, eaten_path = True, path
for n,p in enumerate(patterns):
#For the last pattern, only match the end of the pattern
does_match, eaten_path = match(eaten_path, p, ignore_case, only_end=(n == len(patterns)-1))
if not does_match: break
#If a path doesn't exist, don't jump there
#We still keep it in db in case it's from a removable drive
if does_match and os.path.exists(path):
uniqadd(result_list, path)
if len(result_list) >= max_matches :
break
def get_dic_file(filename="autojump.txt"):
if CONFIG_DIR == os.path.expanduser("~"):
dic_file = CONFIG_DIR+"/." + filename
else:
dic_file = CONFIG_DIR+"/" + filename
return dic_file
def shell_utility():
"""Run this when autojump is called as a shell utility"""
try:
optlist, args = getopt.getopt(argv[1:], 'a',
['stat', 'import', 'completion', 'bash', 'version', 'help'])
except getopt.GetoptError as ex:
print("Unknown command line argument: %s" % ex, file=stderr)
exit(1)
dic_file = get_dic_file()
path_dict = open_dic(dic_file)
if ('-a', '') in optlist:
# The home dir can be reached quickly by "cd"
# and may interfere with other directories
if(args[-1] != os.path.expanduser("~")):
dicadd(path_dict, decode(args[-1]))
save(path_dict, dic_file)
elif ('--stat', '') in optlist:
paths = list(path_dict.items())
paths.sort(key=itemgetter(1))
for path, count in paths[-100:]:
output(unico("%.1f:\t%s") % (count, path))
print("Total key weight: %d. Number of stored paths: %d" %
(sum(path_dict.values()), len(paths)))
elif ('--version', '') in optlist:
print("autojump %s" % AUTOJUMP_VERSION)
elif ('--help', '') in optlist:
print("usage: j <dirspec>")
print("where dirspec is a few characters of the directory you want to jump to.")
else:
import re
completion = False
#userchoice is i if the pattern is __pattern__i, otherwise -1
userchoice = -1
results = []
if ('--completion', '') in optlist:
completion = True
else:
forget(path_dict, dic_file) #gradually forget about old directories
if not args: patterns = [unico("")]
else: patterns = [decode(a) for a in args]
# If the last pattern contains a full path, jump there
# The regexp is because we need to support stuff like
# "j wo jo__3__/home/joel/workspace/joel" for zsh
last_pattern_path = re.sub("(.*)"+COMPLETION_SEPARATOR, "", patterns[-1])
if (len(last_pattern_path)>0 and
last_pattern_path[0] == "/" and
os.path.exists(last_pattern_path)):
if not completion: output(last_pattern_path)
else:
#check for ongoing completion, and act accordingly
endmatch = re.search(COMPLETION_SEPARATOR+"([0-9]+)", patterns[-1])
if endmatch: #user has selected a completion
userchoice = int(endmatch.group(1))
patterns[-1] = re.sub(COMPLETION_SEPARATOR+"[0-9]+.*",
"", patterns[-1])
else: #user hasn't selected a completion, display the same choices again
endmatch = re.match("(.*)"+COMPLETION_SEPARATOR, patterns[-1])
if endmatch: patterns[-1] = endmatch.group(1)
dirs = list(path_dict.items())
dirs.sort(key=itemgetter(1), reverse=True)
if completion or userchoice != -1:
max_matches = 9
else:
max_matches = 1
# Don't jump to the current directory
try:
current_dir = decode(os.path.realpath(os.curdir))
#Sometimes the current path doesn't exist anymore.
#In that case, jump if possible.
except OSError:
current_dir = None
find_matches(dirs, patterns, results, False, max_matches, current_dir)
# If not found, try ignoring case.
# On completion always show all results
if completion or not results:
find_matches(dirs, patterns, results,
ignore_case=True,
max_matches=max_matches, current_dir=current_dir)
# Keep the database to a reasonable size
if not completion and clean_dict(dirs, path_dict):
save(path_dict, dic_file)
if completion and ('--bash', '') in optlist: quotes = "'"
else: quotes = ""
if userchoice != -1:
if len(results) > userchoice-1 :
output(unico("%s%s%s") % (quotes,results[userchoice-1],quotes))
elif len(results) > 1 and completion:
output("\n".join(("%s%s%d%s%s" % (patterns[-1],
COMPLETION_SEPARATOR, n+1, COMPLETION_SEPARATOR, r)
for n, r in enumerate(results[:8]))))
elif results: output(unico("%s%s%s")%(quotes,results[0],quotes))
else:
return False
return True
if __name__ == "__main__":
success=shell_utility()
if not success: exit(1)
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