hooks: Add function to check if a hook exists

diff --git a/contrib/p4import/git-p4import.py b/contrib/p4import/git-p4import.py
index 0f3d97b67eef3108728265e26f5d79c4526d11ac..593d6a0682ba49e31e40e1b4e5c3e0af82fd9cda 100644 (file)
--- a/contrib/p4import/git-p4import.py
+++ b/contrib/p4import/git-p4import.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 #
 # This tool is copyright (c) 2006, Sean Estabrooks.
 # It is released under the Gnu Public License, version 2.
@@ -14,6 +14,11 @@
 import time
 import getopt
 
+if sys.hexversion < 0x02020000:
+   # The behavior of the marshal module changed significantly in 2.2
+   sys.stderr.write("git-p4import.py: requires Python 2.2 or later.\n")
+   sys.exit(1)
+
 from signal import signal, \
    SIGPIPE, SIGINT, SIG_DFL, \
    default_int_handler