Move all app/os specific utils to specific package

thefuck/specific/git.py

@@ -0,0 +1,37 @@
+from functools import wraps
+import re
+from shlex import split
+from ..types import Command
+from ..utils import quote
+
+
+def git_support(fn):
+    """Resolves git aliases and supports testing for both git and hub."""
+    @wraps(fn)
+    def wrapper(command, settings):
+        # supports GitHub's `hub` command
+        # which is recommended to be used with `alias git=hub`
+        # but at this point, shell aliases have already been resolved
+        is_git_cmd = command.script.startswith(('git', 'hub'))
+
+        if not is_git_cmd:
+            return False
+
+        # perform git aliases expansion
+        if 'trace: alias expansion:' in command.stderr:
+            search = re.search("trace: alias expansion: ([^ ]*) => ([^\n]*)",
+                               command.stderr)
+            alias = search.group(1)
+
+            # by default git quotes everything, for example:
+            #     'commit' '--amend'
+            # which is surprising and does not allow to easily test for
+            # eg. 'git commit'
+            expansion = ' '.join(map(quote, split(search.group(2))))
+            new_script = command.script.replace(alias, expansion)
+
+            command = Command._replace(command, script=new_script)
+
+        return fn(command, settings)
+
+    return wrapper