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219 lines
8.2 KiB
219 lines
8.2 KiB
#!/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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#
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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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#
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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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from __future__ import division, print_function
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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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import getopt
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from sys import argv, stderr, version_info
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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 signal
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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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CONFIG_DIR = os.environ.get("AUTOJUMP_DATA_DIR", os.path.expanduser("~"))
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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 save(path_dict, dic_file):
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f = NamedTemporaryFile(dir=CONFIG_DIR, delete=False)
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pickle.dump(path_dict, f, -1)
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f.flush()
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os.fsync(f)
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f.close()
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#cf. http://thunk.org/tytso/blog/2009/03/15/dont-fear-the-fsync/
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os.rename(f.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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import shutil
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shutil.copy(dic_file, dic_file+".bak")
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except OSError as e:
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print("Error while creating backup autojump file. (%s)" % e,
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file=stderr)
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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 dir, dummy in sorted_dirs[MAX_STORED_PATHS-25:]:
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del path_dict[dir]
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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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try:
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if os.path.realpath(os.curdir) == path : return False
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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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pass
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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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match=(match_string.lower().find(pattern.lower()) != -1)
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else:
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match = (match_string.find(pattern) != -1)
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#return True if there is a match and the path exists
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#(useful in the case of external drives, for example)
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return match and os.path.exists(path)
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def find_matches(dirs, patterns, result_list, ignore_case, max_matches):
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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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if len(result_list) >= max_matches : break
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#For the last pattern, only match the end of the pattern
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if all(match(path, p, ignore_case,
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only_end=(n == len(patterns)-1)) for n, p in enumerate(patterns)):
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uniqadd(result_list, path)
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def open_dic(dic_file, error_recovery=False):
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try:
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aj_file = open(dic_file, 'rb')
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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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aj_file.close()
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return path_dict
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except (IOError, EOFError, pickle.UnpicklingError):
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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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import shutil
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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: return {} #if everything fails, return an empty file
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#Main code
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try:
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optlist, args = getopt.getopt(argv[1:], 'a',
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['stat', 'import', 'completion', 'bash'])
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except getopt.GetoptError as e:
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print("Unknown command line argument: %s" % e)
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exit(1)
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if CONFIG_DIR == os.path.expanduser("~"):
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dic_file = CONFIG_DIR+"/.autojump_py"
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else:
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dic_file = CONFIG_DIR+"/autojump_py"
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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, args[-1])
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save(path_dict, dic_file)
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elif ('--stat', '') in optlist:
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a = list(path_dict.items())
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a.sort(key=itemgetter(1))
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for path, count in a[-100:]:
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print("%.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(a)))
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elif ('--import', '') in optlist:
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for i in open(args[-1]).readlines():
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dicadd(path_dict, i[:-1])
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pickle.dump(path_dict, open(dic_file, 'w'), -1)
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else:
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import re
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completion = False
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userchoice = -1 #i if the pattern is of the form __pattern__i, otherwise -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 = [""]
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else: patterns = 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: print(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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find_matches(dirs, patterns, results, False, max_matches)
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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, max_matches=max_matches)
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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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print(quotes+results[userchoice-1]+quotes)
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elif len(results) > 1 and completion:
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print("\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: print(quotes+results[0]+quotes)
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