mirror of
https://github.com/wting/autojump
synced 2024-10-27 20:34:07 +00:00
316 lines
13 KiB
Python
Executable File
316 lines
13 KiB
Python
Executable File
#!/usr/bin/env python
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"""Copyright Joel Schaerer 2008-2010
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This file is part of autojump
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autojump is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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autojump is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with autojump. If not, see <http://www.gnu.org/licenses/>.
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Autojump is a small tool that maintains a database of your most
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used directories, and finds the best match to help you jump to
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frequently used places."""
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from __future__ import division, print_function
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import getopt
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from sys import argv, stderr, version_info, exit, getfilesystemencoding
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from tempfile import NamedTemporaryFile
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from operator import itemgetter
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import os
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import shutil
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AUTOJUMP_VERSION = "release-v19"
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MAX_KEYWEIGHT = 1000
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MAX_STORED_PATHS = 600
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COMPLETION_SEPARATOR = '__'
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if "AUTOJUMP_DATA_DIR" in os.environ:
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CONFIG_DIR = os.environ.get("AUTOJUMP_DATA_DIR")
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else:
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xdg_data_dir = os.environ.get('XDG_DATA_HOME') or os.path.join(os.environ['HOME'], '.local', 'share')
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CONFIG_DIR=os.path.join(xdg_data_dir, 'autojump')
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def uniqadd(collection, key):
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"""Adds a key to a list only if it is not already present"""
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if key not in collection:
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collection.append(key)
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def dicadd(dic, key, increment=1):
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"""Increment a value in a dic, set it to 0
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if is is not already present"""
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dic[key] = dic.get(key, 0.)+increment
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def output(unicode_text,encoding=None):
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"""Wrapper for the print function, using the filesystem encoding by default
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to minimize encoding mismatch problems in directory names"""
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if version_info[0] > 2:
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print(unicode_text)
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else:
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if encoding is None:
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encoding = getfilesystemencoding()
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print(unicode_text.encode(encoding))
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def decode(text,encoding=None,errors="strict"):
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"""Decoding step for python2.x which does not default to unicode"""
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if version_info[0] > 2:
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return text
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else:
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if encoding is None:
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encoding = getfilesystemencoding()
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return text.decode(encoding,errors)
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def unico(text):
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"""if python2, convert to a unicode object"""
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if version_info[0] > 2:
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return text
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else:
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return unicode(text)
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def save(path_dict, dic_file):
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"""Save the database in an atomic way, and preserve
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a backup file."""
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# If the dic_file exists and os supports permissions, check that dic_file belongs to us
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# Otherwise, fail quietly
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if (not os.path.exists(dic_file)) or os.name == 'nt' or os.getuid() == os.stat(dic_file)[4]:
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temp = NamedTemporaryFile(dir=CONFIG_DIR, delete=False)
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for path,weight in sorted(path_dict.items(),key=itemgetter(1),reverse=True):
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# the db is stored in utf-8
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temp.write((unico("%s\t%s\n")%(weight,path)).encode("utf-8"))
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#cf. http://thunk.org/tytso/blog/2009/03/15/dont-fear-the-fsync/
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temp.flush()
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os.fsync(temp)
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temp.close()
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# Use shutil.move instead of os.rename because windows doesn't support
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# using rename to overwrite files
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shutil.move(temp.name, dic_file)
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try: #backup file
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import time
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if (not os.path.exists(dic_file+".bak") or
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time.time()-os.path.getmtime(dic_file+".bak")>86400):
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shutil.copy(dic_file, dic_file+".bak")
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except OSError as ex:
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print("Error while creating backup autojump file. (%s)" %
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ex, file=stderr)
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def open_dic(dic_file, error_recovery=False):
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"""Try hard to open the database file, recovering
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from backup if needed. """
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try:
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path_dict = {}
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with open(dic_file, 'r') as aj_file:
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for l in aj_file.readlines():
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weight,path = l[:-1].split("\t",1)
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# the db is stored in utf-8
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path = decode(path,"utf-8")
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path_dict[path] = float(weight)
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return path_dict
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except (IOError, EOFError):
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if not error_recovery and os.path.exists(dic_file+".bak"):
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print('Problem with autojump database,\
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trying to recover from backup...', file=stderr)
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shutil.copy(dic_file+".bak", dic_file)
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return open_dic(dic_file, True)
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else:
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# Temporary migration code
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old_dic_file = get_dic_file("autojump_py")
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if os.path.exists(old_dic_file):
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try: # fix to get optimised pickle in python < 3
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import cPickle as pickle
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except ImportError:
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import pickle
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try:
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with open(old_dic_file, 'rb') as aj_file:
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if version_info[0] > 2:
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#encoding is only specified for python2.x compatibility
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path_dict = pickle.load(aj_file, encoding="utf-8")
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else:
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path_dict = pickle.load(aj_file)
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unicode_dict = {} #we now use unicode internally
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for k,v in path_dict.items():
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print(k)
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unicode_dict[decode(k,errors="replace")] = v
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return unicode_dict
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except (IOError, EOFError, pickle.UnpicklingError):
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pass
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return {} #if everything fails, return an empty file
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def forget(path_dict, dic_file):
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"""Gradually forget about directories. Only call
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from the actual jump since it can take time"""
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keyweight = sum(path_dict.values())
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if keyweight > MAX_KEYWEIGHT:
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for k in path_dict.keys():
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path_dict[k] *= 0.9 * MAX_KEYWEIGHT / keyweight
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save(path_dict, dic_file)
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def clean_dict(sorted_dirs, path_dict):
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"""Limits the sized of the path_dict to MAX_STORED_PATHS.
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Returns True if keys were deleted"""
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if len(sorted_dirs) > MAX_STORED_PATHS:
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#remove 25 more than needed, to avoid doing it every time
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for path, dummy in sorted_dirs[MAX_STORED_PATHS-25:]:
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del path_dict[path]
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return True
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else: return False
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def match(path, pattern, ignore_case=False, only_end=False):
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"""Check whether a path matches a particular pattern, and return
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the remaning part of the string"""
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if only_end:
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match_string = "/".join(path.split('/')[-1-pattern.count('/'):])
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else:
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match_string = path
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if ignore_case:
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find_idx = match_string.lower().find(pattern.lower())
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else:
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find_idx = match_string.find(pattern)
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does_match = (find_idx != -1)
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# Eat the path to avoid two patterns matching the same part of the string
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if does_match:
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eaten_path = path[find_idx+len(pattern):]
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else:
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eaten_path = path
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return (does_match, eaten_path)
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def find_matches(dirs, patterns, result_list, ignore_case, max_matches, current_dir):
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"""Find max_matches paths that match the pattern,
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and add them to the result_list"""
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for path, count in dirs:
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# Don't jump to where we alread are
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if current_dir == path :
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continue
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does_match, eaten_path = True, path
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for n,p in enumerate(patterns):
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#For the last pattern, only match the end of the pattern
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does_match, eaten_path = match(eaten_path, p, ignore_case, only_end=(n == len(patterns)-1))
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if not does_match: break
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#If a path doesn't exist, don't jump there
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#We still keep it in db in case it's from a removable drive
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if does_match and os.path.exists(path):
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uniqadd(result_list, path)
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if len(result_list) >= max_matches :
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break
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def get_dic_file(filename="autojump.txt"):
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if CONFIG_DIR == os.path.expanduser("~"):
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dic_file = CONFIG_DIR+"/." + filename
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else:
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dic_file = CONFIG_DIR+"/" + filename
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return dic_file
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def shell_utility():
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"""Run this when autojump is called as a shell utility"""
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try:
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optlist, args = getopt.getopt(argv[1:], 'a',
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['stat', 'import', 'completion', 'bash', 'version', 'help'])
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except getopt.GetoptError as ex:
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print("Unknown command line argument: %s" % ex, file=stderr)
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exit(1)
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dic_file = get_dic_file()
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path_dict = open_dic(dic_file)
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if ('-a', '') in optlist:
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# The home dir can be reached quickly by "cd"
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# and may interfere with other directories
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if(args[-1] != os.path.expanduser("~")):
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dicadd(path_dict, decode(args[-1]))
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save(path_dict, dic_file)
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elif ('--stat', '') in optlist:
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paths = list(path_dict.items())
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paths.sort(key=itemgetter(1))
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for path, count in paths[-100:]:
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output(unico("%.1f:\t%s") % (count, path))
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print("Total key weight: %d. Number of stored paths: %d" %
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(sum(path_dict.values()), len(paths)))
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elif ('--version', '') in optlist:
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print("autojump %s" % AUTOJUMP_VERSION)
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elif ('--help', '') in optlist:
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print("usage: j <dirspec>")
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print("where dirspec is a few characters of the directory you want to jump to.")
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else:
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import re
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completion = False
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#userchoice is i if the pattern is __pattern__i, otherwise -1
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userchoice = -1
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results = []
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if ('--completion', '') in optlist:
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completion = True
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else:
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forget(path_dict, dic_file) #gradually forget about old directories
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if not args: patterns = [unico("")]
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else: patterns = [decode(a) for a in args]
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# If the last pattern contains a full path, jump there
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# The regexp is because we need to support stuff like
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# "j wo jo__3__/home/joel/workspace/joel" for zsh
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last_pattern_path = re.sub("(.*)"+COMPLETION_SEPARATOR, "", patterns[-1])
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if (len(last_pattern_path)>0 and
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last_pattern_path[0] == "/" and
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os.path.exists(last_pattern_path)):
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if not completion: output(last_pattern_path)
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else:
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#check for ongoing completion, and act accordingly
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endmatch = re.search(COMPLETION_SEPARATOR+"([0-9]+)", patterns[-1])
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if endmatch: #user has selected a completion
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userchoice = int(endmatch.group(1))
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patterns[-1] = re.sub(COMPLETION_SEPARATOR+"[0-9]+.*",
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"", patterns[-1])
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else: #user hasn't selected a completion, display the same choices again
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endmatch = re.match("(.*)"+COMPLETION_SEPARATOR, patterns[-1])
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if endmatch: patterns[-1] = endmatch.group(1)
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dirs = list(path_dict.items())
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dirs.sort(key=itemgetter(1), reverse=True)
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if completion or userchoice != -1:
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max_matches = 9
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else:
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max_matches = 1
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# Don't jump to the current directory
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try:
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current_dir = decode(os.path.realpath(os.curdir))
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#Sometimes the current path doesn't exist anymore.
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#In that case, jump if possible.
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except OSError:
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current_dir = None
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find_matches(dirs, patterns, results, False, max_matches, current_dir)
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# If not found, try ignoring case.
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# On completion always show all results
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if completion or not results:
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find_matches(dirs, patterns, results,
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ignore_case=True,
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max_matches=max_matches, current_dir=current_dir)
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# Keep the database to a reasonable size
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if not completion and clean_dict(dirs, path_dict):
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save(path_dict, dic_file)
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if completion and ('--bash', '') in optlist: quotes = "'"
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else: quotes = ""
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if userchoice != -1:
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if len(results) > userchoice-1 :
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output(unico("%s%s%s") % (quotes,results[userchoice-1],quotes))
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elif len(results) > 1 and completion:
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output("\n".join(("%s%s%d%s%s" % (patterns[-1],
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COMPLETION_SEPARATOR, n+1, COMPLETION_SEPARATOR, r)
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for n, r in enumerate(results[:8]))))
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elif results: output(unico("%s%s%s")%(quotes,results[0],quotes))
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else:
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return False
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return True
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if __name__ == "__main__":
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success=shell_utility()
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if not success: exit(1)
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