fix xcode project

scripts/pre-build.py

@@ -6,7 +6,7 @@ import re, subprocess, sys
 
 branch = check_output(["git", "rev-parse", "--abbrev-ref", "HEAD"]).rstrip().decode("utf-8")
 shorthash = check_output(["git", "log", "--pretty=format:%h", "-n 1"]).rstrip().decode("utf-8")
-revcount = len(check_output(["git", "log", "--oneline"]).split(b'\n')) - 1
+revcount = int(check_output(["git", "rev-list", "--count", "HEAD"]))
 tag = check_output(["git", "describe", "--tags", "--abbrev=0"]).rstrip().decode("utf-8")
 config = sys.argv[1]