basedir.get_basedir_git() now takes an optional path argument.

This enables us to change the working directory for the git commands
in the function upon request. This change is in preparation of the
completion of #24.

gitinspector/basedir.py

@@ -27,7 +27,13 @@ def get_basedir():
 	else:
 		return os.path.dirname(os.path.realpath(__file__))
 
-def get_basedir_git():
+def get_basedir_git(path=None):
+	previous_directory = None
+
+	if path != None:
+		previous_directory = os.getcwd()
+		os.chdir(path)
+
 	bare_command = subprocess.Popen(["git", "rev-parse", "--is-bare-repository"], bufsize=1,
 	                          stdout=subprocess.PIPE, stderr=open(os.devnull, "w"))
 
@@ -51,4 +57,7 @@ def get_basedir_git():
 	if len(absolute_path) == 0:
 		sys.exit(_("Unable to determine absolute path of git repository."))
 
+	if path != None:
+		os.chdir(previous_directory)
+
 	return absolute_path[0].decode("utf-8", "replace").strip()