From f20311fa89df2887d49395a8815cd3d6a00ef765 Mon Sep 17 00:00:00 2001
From: nvbn <nvbn.rm@gmail.com>
Date: Thu, 29 Oct 2015 00:13:59 +0800
Subject: [PATCH] #392: Little refactoring

---
 thefuck/rules/cargo_no_command.py  |  2 +-
 thefuck/rules/cd_correction.py     |  2 +-
 thefuck/rules/dirty_untar.py       |  6 +++---
 thefuck/rules/dirty_unzip.py       |  2 +-
 thefuck/rules/dry.py               |  4 ++--
 thefuck/rules/git_branch_list.py   |  4 ++--
 thefuck/rules/git_fix_stash.py     |  8 +++----
 thefuck/rules/has_exists_script.py |  2 +-
 thefuck/rules/ls_lah.py            |  4 ++--
 thefuck/rules/man.py               |  2 +-
 thefuck/rules/mercurial.py         |  2 +-
 thefuck/rules/no_command.py        |  8 +++----
 thefuck/rules/pacman_not_found.py  |  8 +++----
 thefuck/rules/python_command.py    |  2 +-
 thefuck/rules/rm_root.py           |  4 ++--
 thefuck/rules/systemctl.py         |  4 ++--
 thefuck/rules/vagrant_up.py        |  2 +-
 thefuck/rules/whois.py             |  2 +-
 thefuck/types.py                   | 34 ++++++++++++++----------------
 thefuck/utils.py                   |  4 ++--
 20 files changed, 52 insertions(+), 54 deletions(-)

diff --git a/thefuck/rules/cargo_no_command.py b/thefuck/rules/cargo_no_command.py
index f181623..02e2a7f 100644
--- a/thefuck/rules/cargo_no_command.py
+++ b/thefuck/rules/cargo_no_command.py
@@ -9,7 +9,7 @@ def match(command):
 
 
 def get_new_command(command):
-    broken = command.split_script[1]
+    broken = command.script_parts[1]
     fix = re.findall(r'Did you mean `([^`]*)`', command.stderr)[0]
 
     return replace_argument(command.script, broken, fix)
diff --git a/thefuck/rules/cd_correction.py b/thefuck/rules/cd_correction.py
index 4988697..5adab75 100644
--- a/thefuck/rules/cd_correction.py
+++ b/thefuck/rules/cd_correction.py
@@ -33,7 +33,7 @@ def get_new_command(command):
     defaults to the rules of cd_mkdir.
     Change sensitivity by changing MAX_ALLOWED_DIFF. Default value is 0.6
     """
-    dest = command.split_script[1].split(os.sep)
+    dest = command.script_parts[1].split(os.sep)
     if dest[-1] == '':
         dest = dest[:-1]
     cwd = os.getcwd()
diff --git a/thefuck/rules/dirty_untar.py b/thefuck/rules/dirty_untar.py
index 2b5090f..efbf1e3 100644
--- a/thefuck/rules/dirty_untar.py
+++ b/thefuck/rules/dirty_untar.py
@@ -30,17 +30,17 @@ def _tar_file(cmd):
 def match(command):
     return ('-C' not in command.script
             and _is_tar_extract(command.script)
-            and _tar_file(command.split_script) is not None)
+            and _tar_file(command.script_parts) is not None)
 
 
 def get_new_command(command):
-    dir = shells.quote(_tar_file(command.split_script)[1])
+    dir = shells.quote(_tar_file(command.script_parts)[1])
     return shells.and_('mkdir -p {dir}', '{cmd} -C {dir}') \
         .format(dir=dir, cmd=command.script)
 
 
 def side_effect(old_cmd, command):
-    with tarfile.TarFile(_tar_file(old_cmd.split_script)[0]) as archive:
+    with tarfile.TarFile(_tar_file(old_cmd.script_parts)[0]) as archive:
         for file in archive.getnames():
             try:
                 os.remove(file)
diff --git a/thefuck/rules/dirty_unzip.py b/thefuck/rules/dirty_unzip.py
index fced9b3..f15d6e9 100644
--- a/thefuck/rules/dirty_unzip.py
+++ b/thefuck/rules/dirty_unzip.py
@@ -14,7 +14,7 @@ def _zip_file(command):
     # unzip [-flags] file[.zip] [file(s) ...] [-x file(s) ...]
     #                ^          ^ files to unzip from the archive
     #                archive to unzip
-    for c in command.split_script[1:]:
+    for c in command.script_parts[1:]:
         if not c.startswith('-'):
             if c.endswith('.zip'):
                 return c
diff --git a/thefuck/rules/dry.py b/thefuck/rules/dry.py
index d05fdaf..cfc91da 100644
--- a/thefuck/rules/dry.py
+++ b/thefuck/rules/dry.py
@@ -1,5 +1,5 @@
 def match(command):
-    split_command = command.split_script
+    split_command = command.script_parts
 
     return (split_command
             and len(split_command) >= 2
@@ -7,7 +7,7 @@ def match(command):
 
 
 def get_new_command(command):
-    return ' '.join(command.split_script[1:])
+    return ' '.join(command.script_parts[1:])
 
 # it should be rare enough to actually have to type twice the same word, so
 # this rule can have a higher priority to come before things like "cd cd foo"
diff --git a/thefuck/rules/git_branch_list.py b/thefuck/rules/git_branch_list.py
index 5c055d3..4c77b14 100644
--- a/thefuck/rules/git_branch_list.py
+++ b/thefuck/rules/git_branch_list.py
@@ -5,8 +5,8 @@ from thefuck.specific.git import git_support
 @git_support
 def match(command):
     # catches "git branch list" in place of "git branch"
-    return (command.split_script
-            and command.split_script[1:] == 'branch list'.split())
+    return (command.script_parts
+            and command.script_parts[1:] == 'branch list'.split())
 
 
 @git_support
diff --git a/thefuck/rules/git_fix_stash.py b/thefuck/rules/git_fix_stash.py
index 4714f86..19cef4c 100644
--- a/thefuck/rules/git_fix_stash.py
+++ b/thefuck/rules/git_fix_stash.py
@@ -5,8 +5,8 @@ from thefuck.specific.git import git_support
 
 @git_support
 def match(command):
-    if command.split_script and len(command.split_script) > 1:
-        return (command.split_script[1] == 'stash'
+    if command.script_parts and len(command.script_parts) > 1:
+        return (command.script_parts[1] == 'stash'
                 and 'usage:' in command.stderr)
     else:
         return False
@@ -25,12 +25,12 @@ stash_commands = (
 
 @git_support
 def get_new_command(command):
-    stash_cmd = command.split_script[2]
+    stash_cmd = command.script_parts[2]
     fixed = utils.get_closest(stash_cmd, stash_commands, fallback_to_first=False)
 
     if fixed is not None:
         return replace_argument(command.script, stash_cmd, fixed)
     else:
-        cmd = command.split_script[:]
+        cmd = command.script_parts[:]
         cmd.insert(2, 'save')
         return ' '.join(cmd)
diff --git a/thefuck/rules/has_exists_script.py b/thefuck/rules/has_exists_script.py
index c62da9e..e71b3a1 100644
--- a/thefuck/rules/has_exists_script.py
+++ b/thefuck/rules/has_exists_script.py
@@ -4,7 +4,7 @@ from thefuck.specific.sudo import sudo_support
 
 @sudo_support
 def match(command):
-    return command.split_script and os.path.exists(command.split_script[0]) \
+    return command.script_parts and os.path.exists(command.script_parts[0]) \
         and 'command not found' in command.stderr
 
 
diff --git a/thefuck/rules/ls_lah.py b/thefuck/rules/ls_lah.py
index bd1f16b..93c0da5 100644
--- a/thefuck/rules/ls_lah.py
+++ b/thefuck/rules/ls_lah.py
@@ -3,10 +3,10 @@ from thefuck.utils import for_app
 
 @for_app('ls')
 def match(command):
-    return command.split_script and 'ls -' not in command.script
+    return command.script_parts and 'ls -' not in command.script
 
 
 def get_new_command(command):
-    command = command.split_script[:]
+    command = command.script_parts[:]
     command[0] = 'ls -lah'
     return ' '.join(command)
diff --git a/thefuck/rules/man.py b/thefuck/rules/man.py
index 18972be..ead1361 100644
--- a/thefuck/rules/man.py
+++ b/thefuck/rules/man.py
@@ -12,7 +12,7 @@ def get_new_command(command):
     if '2' in command.script:
         return command.script.replace("2", "3")
 
-    split_cmd2 = command.split_script
+    split_cmd2 = command.script_parts
     split_cmd3 = split_cmd2[:]
 
     split_cmd2.insert(1, ' 2 ')
diff --git a/thefuck/rules/mercurial.py b/thefuck/rules/mercurial.py
index b1d93de..f2b6581 100644
--- a/thefuck/rules/mercurial.py
+++ b/thefuck/rules/mercurial.py
@@ -21,7 +21,7 @@ def match(command):
 
 
 def get_new_command(command):
-    script = command.split_script[:]
+    script = command.script_parts[:]
     possibilities = extract_possibilities(command)
     script[1] = get_closest(script[1], possibilities)
     return ' '.join(script)
diff --git a/thefuck/rules/no_command.py b/thefuck/rules/no_command.py
index 2f46bfc..f67cda5 100644
--- a/thefuck/rules/no_command.py
+++ b/thefuck/rules/no_command.py
@@ -5,17 +5,17 @@ from thefuck.specific.sudo import sudo_support
 
 @sudo_support
 def match(command):
-    return (command.split_script
+    return (command.script_parts
             and 'not found' in command.stderr
-            and bool(get_close_matches(command.split_script[0],
+            and bool(get_close_matches(command.script_parts[0],
                                        get_all_executables())))
 
 
 @sudo_support
 def get_new_command(command):
-    old_command = command.split_script[0]
+    old_command = command.script_parts[0]
     new_cmds = get_close_matches(old_command, get_all_executables(), cutoff=0.1)
-    return [' '.join([new_command] + command.split_script[1:])
+    return [' '.join([new_command] + command.script_parts[1:])
             for new_command in new_cmds]
 
 
diff --git a/thefuck/rules/pacman_not_found.py b/thefuck/rules/pacman_not_found.py
index 129f80f..2019a4f 100644
--- a/thefuck/rules/pacman_not_found.py
+++ b/thefuck/rules/pacman_not_found.py
@@ -11,14 +11,14 @@ from thefuck.specific.archlinux import get_pkgfile, archlinux_env
 
 
 def match(command):
-    return (command.split_script
-            and (command.split_script[0] in ('pacman', 'yaourt')
-                 or command.split_script[0:2] == ['sudo', 'pacman'])
+    return (command.script_parts
+            and (command.script_parts[0] in ('pacman', 'yaourt')
+                 or command.script_parts[0:2] == ['sudo', 'pacman'])
             and 'error: target not found:' in command.stderr)
 
 
 def get_new_command(command):
-    pgr = command.split_script[-1]
+    pgr = command.script_parts[-1]
 
     return replace_command(command, pgr, get_pkgfile(pgr))
 
diff --git a/thefuck/rules/python_command.py b/thefuck/rules/python_command.py
index 714d6d3..b4c321b 100644
--- a/thefuck/rules/python_command.py
+++ b/thefuck/rules/python_command.py
@@ -6,7 +6,7 @@ from thefuck.specific.sudo import sudo_support
 
 @sudo_support
 def match(command):
-    toks = command.split_script
+    toks = command.script_parts
     return (toks
             and toks[0].endswith('.py')
             and ('Permission denied' in command.stderr or
diff --git a/thefuck/rules/rm_root.py b/thefuck/rules/rm_root.py
index ad4aa7e..3ac8d4a 100644
--- a/thefuck/rules/rm_root.py
+++ b/thefuck/rules/rm_root.py
@@ -5,8 +5,8 @@ enabled_by_default = False
 
 @sudo_support
 def match(command):
-    return (command.split_script
-            and {'rm', '/'}.issubset(command.split_script)
+    return (command.script_parts
+            and {'rm', '/'}.issubset(command.script_parts)
             and '--no-preserve-root' not in command.script
             and '--no-preserve-root' in command.stderr)
 
diff --git a/thefuck/rules/systemctl.py b/thefuck/rules/systemctl.py
index 2605b62..334c783 100644
--- a/thefuck/rules/systemctl.py
+++ b/thefuck/rules/systemctl.py
@@ -10,13 +10,13 @@ from thefuck.utils import for_app
 def match(command):
     # Catches "Unknown operation 'service'." when executing systemctl with
     # misordered arguments
-    cmd = command.split_script
+    cmd = command.script_parts
     return (cmd and 'Unknown operation \'' in command.stderr and
             len(cmd) - cmd.index('systemctl') == 3)
 
 
 @sudo_support
 def get_new_command(command):
-    cmd = command.split_script
+    cmd = command.script_parts
     cmd[-1], cmd[-2] = cmd[-2], cmd[-1]
     return ' '.join(cmd)
diff --git a/thefuck/rules/vagrant_up.py b/thefuck/rules/vagrant_up.py
index d638527..04610a0 100644
--- a/thefuck/rules/vagrant_up.py
+++ b/thefuck/rules/vagrant_up.py
@@ -8,7 +8,7 @@ def match(command):
 
 
 def get_new_command(command):
-    cmds = command.split_script
+    cmds = command.script_parts
     machine = None
     if len(cmds) >= 3:
         machine = cmds[2]
diff --git a/thefuck/rules/whois.py b/thefuck/rules/whois.py
index 61711de..c16bd70 100644
--- a/thefuck/rules/whois.py
+++ b/thefuck/rules/whois.py
@@ -25,7 +25,7 @@ def match(command):
 
 
 def get_new_command(command):
-    url = command.split_script[1]
+    url = command.script_parts[1]
 
     if '/' in command.script:
         return 'whois ' + urlparse(url).netloc
diff --git a/thefuck/types.py b/thefuck/types.py
index 779829b..442744c 100644
--- a/thefuck/types.py
+++ b/thefuck/types.py
@@ -1,13 +1,13 @@
+from imp import load_source
+from subprocess import Popen, PIPE
+import os
+import sys
+import six
+from psutil import Process, TimeoutExpired
 from . import logs, shells
 from .conf import settings, DEFAULT_PRIORITY, ALL_ENABLED
 from .exceptions import EmptyCommand
 from .utils import compatibility_call
-from imp import load_source
-from psutil import Process, TimeoutExpired
-from subprocess import Popen, PIPE
-import os
-import six
-import sys
 
 
 class Command(object):
@@ -21,22 +21,20 @@ class Command(object):
         :type stderr: basestring
 
         """
-        self._script = script
+        self.script = script
         self.stdout = stdout
         self.stderr = stderr
 
-        try:
-            self._split_script = shells.split_command(script)
-        except:
-            self._split_script = None
-
     @property
-    def script(self):
-        return self._script
-
-    @property
-    def split_script(self):
-        return self._split_script
+    def script_parts(self):
+        if not hasattr(self, '_script_parts'):
+            try:
+                self._script_parts = shells.split_command(self.script)
+            except Exception as e:
+                logs.exception("Can't split command script {}".format(self),
+                               sys.exc_info())
+                self._script_parts = None
+        return self._script_parts
 
     def __eq__(self, other):
         if isinstance(other, Command):
diff --git a/thefuck/utils.py b/thefuck/utils.py
index bdcc25b..2d0266e 100644
--- a/thefuck/utils.py
+++ b/thefuck/utils.py
@@ -145,8 +145,8 @@ def is_app(command, *app_names, **kwargs):
     if kwargs:
         raise TypeError("got an unexpected keyword argument '{}'".format(kwargs.keys()))
 
-    if command.split_script is not None and len(command.split_script) > at_least:
-        return command.split_script[0] in app_names
+    if command.script_parts is not None and len(command.script_parts) > at_least:
+        return command.script_parts[0] in app_names
 
     return False