[gitstatus.py] Use --porcelain to make faster in using python

gitstatus.py

@@ -17,20 +17,25 @@
 
 branch = branch.decode("utf-8").strip()[11:]
 
-res, err = Popen(['git','diff','--name-status'], stdout=PIPE, stderr=PIPE).communicate()
+# Get git status (staged, change, conflicts and untracked)
+res, err = Popen(['git', 'status', '--porcelain'], stdout=PIPE, stderr=PIPE).communicate()
 err_string = err.decode('utf-8')
 if 'fatal' in err_string:
 	sys.exit(0)
-changed_files = [namestat[0] for namestat in res.decode("utf-8").splitlines()]
-staged_files = [namestat[0] for namestat in Popen(['git','diff', '--staged','--name-status'], stdout=PIPE).communicate()[0].splitlines()]
-nb_changed = len(changed_files) - changed_files.count('U')
-nb_U = staged_files.count('U')
-nb_staged = len(staged_files) - nb_U
-staged = str(nb_staged)
-conflicts = str(nb_U)
-changed = str(nb_changed)
-nb_untracked = len([0 for status in Popen(['git','status','--porcelain',],stdout=PIPE).communicate()[0].decode("utf-8").splitlines() if status.startswith('??')])
-untracked = str(nb_untracked)
+status = [(st[0], st[1], st[2:]) for st in res.splitlines()]
+tracked, untracked = [], []
+for st in status:
+    if st[0] == '?' and st[1] == '?':
+        untracked.append(st)
+    else:
+        tracked.append(st)
+staged = filter(lambda x: x[0] != ' ' and x[0] != 'U', tracked)
+changed = filter(lambda x: x[1] == 'M', tracked)
+conflicts = filter(lambda x: x[0] == 'U', tracked)
+n_staged = len(staged)
+n_changed = len(changed)
+n_conflicts = len(conflicts)
+n_untracked = len(untracked)
 
 ahead, behind = 0,0
 
@@ -56,10 +61,10 @@
 	branch,
 	str(ahead),
 	str(behind),
-	staged,
-	conflicts,
-	changed,
-	untracked,
+	str(n_staged),
+	str(n_conflicts),
+	str(n_changed),
+	str(n_untracked),
 	])
 print(out, end='')