Implemented support for remote repositories (Fixes issue 18).

The supported protocols are file://, git://, http://, https:// and ssh://.

Whenever one of the above prefixes are detected in the repository name,
"git clone" is used to clone the repository into a temporary directory.

When "git clone" is called, it's output is redirected to stderr; meaning
that redirection of stdout to a file functions just as before.

If "git clone" fails for some reason, gitinspector will exit; returning
the error code from the "git clone" command.

gitinspector/clone.py

@@ -0,0 +1,49 @@
+# coding: utf-8
+#
+# Copyright © 2014 Ejwa Software. All rights reserved.
+#
+# This file is part of gitinspector.
+#
+# gitinspector is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# gitinspector is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with gitinspector. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import unicode_literals
+
+import shutil
+import subprocess
+import sys
+import tempfile
+
+__cloned_path__ = None
+
+def create(url):
+	if url.startswith("file://") or url.startswith("git://") or url.startswith("http://") or \
+	   url.startswith("https://") or url.startswith("ssh://"):
+		global __cloned_path__
+
+		location = tempfile.mkdtemp(suffix=".gitinspector")
+		git_clone = subprocess.Popen("git clone {0} {1}".format(url, location), shell=True, bufsize=1, stdout=sys.stderr)
+		git_clone.wait()
+
+		if git_clone.returncode != 0:
+			sys.exit(git_clone.returncode)
+
+		__cloned_path__ = location
+		return location
+	return url
+
+def delete():
+	global __cloned_path__
+
+	if __cloned_path__:
+		shutil.rmtree(__cloned_path__, ignore_errors=True)

gitinspector/gitinspector.py

@@ -24,8 +24,10 @@ from __future__ import unicode_literals
 import localization
 localization.init()
 
+import atexit
 import blame
 import changes
+import clone
 import config
 import extensions
 import filtering
@@ -127,6 +129,9 @@ def main():
 		for arg in __args__:
 			__run__.repo = arg
 
+		#Try to clone the repo or return the same directory and bail out.
+		__run__.repo = clone.create(__run__.repo)
+
 		#We need the repo above to be set before we read the git config.
 		config.init(__run__)
 		clear_x_on_next_pass = True
@@ -198,5 +203,9 @@ def main():
 		print(_("Try `{0} --help' for more information.").format(sys.argv[0]), file=sys.stderr)
 		sys.exit(2)
 
+@atexit.register
+def cleanup():
+	clone.delete()
+
 if __name__ == "__main__":
 	main()