mirror of
https://github.com/wting/autojump
synced 2024-10-27 20:34:07 +00:00
148 lines
4.2 KiB
Python
148 lines
4.2 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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from __future__ import print_function
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import os
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import shutil
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import sys
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from codecs import open
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from collections import namedtuple
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from tempfile import NamedTemporaryFile
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from time import time
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from autojump_utils import create_dir
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from autojump_utils import is_osx
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from autojump_utils import is_python3
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from autojump_utils import move_file
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from autojump_utils import unico
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if sys.version_info[0] == 3:
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ifilter = filter
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imap = map
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else:
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from itertools import ifilter # noqa
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from itertools import imap # noqa
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BACKUP_THRESHOLD = 24 * 60 * 60
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Entry = namedtuple('Entry', ['path', 'weight'])
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def dictify(entries):
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"""
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Converts a list of entries into a dictionary where
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key = path
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value = weight
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"""
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result = {}
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for entry in entries:
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result[entry.path] = entry.weight
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return result
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def entriefy(data):
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"""Converts a dictionary into an iterator of entries."""
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convert = lambda tup: Entry(*tup)
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if is_python3():
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return map(convert, data.items())
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return imap(convert, data.iteritems())
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def load(config):
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"""Returns a dictonary (key=path, value=weight) loaded from data file."""
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xdg_aj_home = os.path.join(
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os.path.expanduser('~'),
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'.local',
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'share',
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'autojump',
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)
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if is_osx() and os.path.exists(xdg_aj_home):
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migrate_osx_xdg_data(config)
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if not os.path.exists(config['data_path']):
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return {}
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# example: u'10.0\t/home/user\n' -> ['10.0', u'/home/user']
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parse = lambda line: line.strip().split('\t')
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correct_length = lambda x: len(x) == 2
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# example: ['10.0', u'/home/user'] -> (u'/home/user', 10.0)
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tupleize = lambda x: (x[1], float(x[0]))
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try:
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with open(
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config['data_path'],
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'r', encoding='utf-8',
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errors='replace',
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) as f:
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return dict(
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imap(
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tupleize,
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ifilter(correct_length, imap(parse, f)),
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),
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)
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except (IOError, EOFError):
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return load_backup(config)
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def load_backup(config):
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if os.path.exists(config['backup_path']):
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move_file(config['backup_path'], config['data_path'])
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return load(config)
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return {}
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def migrate_osx_xdg_data(config):
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"""
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Older versions incorrectly used Linux XDG_DATA_HOME paths on OS X. This
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migrates autojump files from ~/.local/share/autojump to ~/Library/autojump
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"""
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assert is_osx(), 'This function should only be run on OS X.'
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xdg_data_home = os.path.join(os.path.expanduser('~'), '.local', 'share')
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xdg_aj_home = os.path.join(xdg_data_home, 'autojump')
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data_path = os.path.join(xdg_aj_home, 'autojump.txt')
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backup_path = os.path.join(xdg_aj_home, 'autojump.txt.bak')
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if os.path.exists(data_path):
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move_file(data_path, config['data_path'])
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if os.path.exists(backup_path):
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move_file(backup_path, config['backup_path'])
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# cleanup
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shutil.rmtree(xdg_aj_home)
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if len(os.listdir(xdg_data_home)) == 0:
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shutil.rmtree(xdg_data_home)
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def save(config, data):
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"""Save data and create backup, creating a new data file if necessary."""
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create_dir(os.path.dirname(config['data_path']))
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# atomically save by writing to temporary file and moving to destination
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try:
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temp = NamedTemporaryFile(delete=False)
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# Windows cannot reuse the same open file name
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temp.close()
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with open(temp.name, 'w', encoding='utf-8', errors='replace') as f:
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for path, weight in data.items():
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f.write(unico('%s\t%s\n' % (weight, path)))
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f.flush()
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os.fsync(f)
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except IOError as ex:
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print('Error saving autojump data (disk full?)' % ex, file=sys.stderr)
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sys.exit(1)
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# move temp_file -> autojump.txt
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move_file(temp.name, config['data_path'])
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# create backup file if it doesn't exist or is older than BACKUP_THRESHOLD
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if not os.path.exists(config['backup_path']) or \
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(time() - os.path.getmtime(config['backup_path']) > BACKUP_THRESHOLD): # noqa
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shutil.copy(config['data_path'], config['backup_path'])
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