simplify unicode encode/decoding

bin/data.py

@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 from __future__ import print_function
 
+from codecs import open
 from itertools import imap
 from operator import itemgetter
 import os
@@ -10,11 +11,8 @@ import sys
 from time import time
 
 from utils import create_dir
-from utils import decode
 from utils import is_osx
-from utils import is_python3
 from utils import move_file
-from utils import unico as unicode
 
 
 BACKUP_THRESHOLD = 24 * 60 * 60
@@ -32,28 +30,24 @@ def load(config):
 
     if os.path.exists(config['data_path']):
         try:
-            if is_python3():
-                with open(data_path, 'r', encoding='utf-8') as f:
-                    lines = f.readlines()
-            else:
-                with open(data_path, 'r') as f:
+            with open(config['data_path'], 'r', encoding='utf-8', errors='replace') as f:
                 lines = f.readlines()
         except (IOError, EOFError):
             return load_backup(config)
 
-        # example: '10.0\t/home/user\n' -> ['10.0', '/home/user']
+        # example: u'10.0\t/home/user\n' -> ['10.0', u'/home/user']
         parse = lambda x: x.strip().split('\t')
 
-        # example: ['10.0', '/home/user'] -> (u'/home/user', 10.0)
-        convert = lambda x: (decode(x[1], 'utf-8'), float(x[0]))
+        # example: ['10.0', u'/home/user'] -> (u'/home/user', 10.0)
+        convert = lambda x: (x[1], float(x[0])
 
         return dict(imap(convert, imap(parse, lines)))
     return {}
 
 
 def load_backup(config):
-    if os.path.exists(config['data_backup_path']):
-        move_file(config['data_backup_path'], config['data_path'])
+    if os.path.exists(config['backup_path']):
+        move_file(config['backup_path'], config['data_path'])
         return load(config)
     return {}
 
@@ -68,12 +62,12 @@ def migrate_osx_xdg_data(config):
     xdg_data_home = os.path.join(os.path.expanduser('~'), '.local', 'share')
     xdg_aj_home = os.path.join(xdg_data_home, 'autojump')
     data_path = os.path.join(xdg_aj_home, 'autojump.txt'),
-    data_backup_path = os.path.join(xdg_aj_home, 'autojump.txt.bak'),
+    backup_path = os.path.join(xdg_aj_home, 'autojump.txt.bak'),
 
     if os.path.exists(data_path):
         move_file(data_path, config['data_path'])
-    if os.path.exists(data_backup_path):
-        move_file(data_backup_path, config['data_backup_path'])
+    if os.path.exists(backup_path):
+        move_file(backup_path, config['backup_path'])
 
     # cleanup
     shutil.rmtree(xdg_aj_home)
@@ -86,29 +80,25 @@ def save(config, data):
     create_dir(os.path.dirname(config['data_path']))
 
     # atomically save by writing to temporary file and moving to destination
-    temp_file = tempfile.NamedTemporaryFile(
-            dir=os.path.dirname(config['data_path']),
-            delete=False)
-
     try:
+        # write to temp file
+        with open(config['tmp_path'], 'w', encoding='utf-8', errors='replace') as f:
             for path, weight in sorted(
                     data.iteritems(),
                     key=itemgetter(1),
                     reverse=True):
-            temp_file.write((unicode("%s\t%s\n" % (weight, path)).encode("utf-8")))
+                f.write((unicode("%s\t%s\n" % (weight, path)).encode('utf-8')))
 
-        temp_file.flush()
-        os.fsync(temp_file)
-        temp_file.close()
+            f.flush()
+            os.fsync(f)
     except IOError as ex:
         print("Error saving autojump data (disk full?)" % ex, file=sys.stderr)
         sys.exit(1)
 
-    # if no backup file or backup file is older than 24 hours,
-    # move autojump.txt -> autojump.txt.bak
-    if not os.path.exists(config['data_backup_path']) or \
-            (time() - os.path.getmtime(config['data_backup_path']) > BACKUP_THRESHOLD):
-        move_file(config['data_path'], config['data_backup_path'])
+    # create backup file if it doesn't exist or is older than BACKUP_THRESHOLD
+    if not os.path.exists(config['backup_path']) or \
+            (time() - os.path.getmtime(config['backup_path']) > BACKUP_THRESHOLD):
+        move_file(config['data_path'], config['backup_path'])
 
     # move temp_file -> autojump.txt
     move_file(temp_file.name, config['data_path'])

bin/utils.py

@@ -17,14 +17,6 @@ def create_dir(path):
             raise
 
 
-def is_python2():
-    return sys.version_info[0] > 2
-
-
-def is_python3():
-    return sys.version_info[0] > 3
-
-
 def is_linux():
     return platform.system() == 'Linux'
 
@@ -37,29 +29,6 @@ def is_windows():
     return platform.system() == 'Windows'
 
 
-def decode(string, encoding=None, errors="strict"):
-    """
-    Decoding step for Python 2 which does not default to unicode.
-    """
-    if is_python2():
-        return string
-    else:
-        if encoding is None:
-            encoding = sys.getfilesystemencoding()
-        return string.decode(encoding, errors)
-
-
-def unico(string):
-    """
-    If Python 2, convert to a unicode object.
-    """
-    print("custom unicode")
-    if sys.version_info[0] > 2:
-        return string
-    else:
-        return unicode(string)
-
-
 def move_file(src, dst):
     """
     Atomically move file.