Add checks to Python scripts for version dependencies.

Signed-off-by: Eric S. Raymond <esr@thyrsus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

5 files changed, 27 insertions, 2 deletions

diff --git a/contrib/ciabot/ciabot.py b/contrib/ciabot/ciabot.py
index bd24395..36b5665 100755
--- a/contrib/ciabot/ciabot.py
+++ b/contrib/ciabot/ciabot.py
@@ -47,7 +47,13 @@
 # we default to that.
 #
 
-import os, sys, commands, socket, urllib
+import sys
+if sys.hexversion < 0x02000000:
+        # The limiter is the xml.sax module
+        sys.stderr.write("ciabot.py: requires Python 2.0.0 or later.\n")
+        sys.exit(1)
+
+import os, commands, socket, urllib
 from xml.sax.saxutils import escape
 
 # Changeset URL prefix for your repo: when the commit ID is appended
diff --git a/contrib/fast-import/import-zips.py b/contrib/fast-import/import-zips.py
index 82f5ed3..5cec9b0 100755
--- a/contrib/fast-import/import-zips.py
+++ b/contrib/fast-import/import-zips.py
@@ -9,10 +9,15 @@
 ##  git log --stat import-zips
 
 from os import popen, path
-from sys import argv, exit
+from sys import argv, exit, hexversion, stderr
 from time import mktime
 from zipfile import ZipFile
 
+if hexversion < 0x01060000:
+        # The limiter is the zipfile module
+        sys.stderr.write("import-zips.py: requires Python 1.6.0 or later.\n")
+        sys.exit(1)
+
 if len(argv) < 2:
 	print 'Usage:', argv[0], '<zipfile>...'
 	exit(1)
diff --git a/contrib/hg-to-git/hg-to-git.py b/contrib/hg-to-git/hg-to-git.py
index 046cb2b..232625a 100755
--- a/contrib/hg-to-git/hg-to-git.py
+++ b/contrib/hg-to-git/hg-to-git.py
@@ -23,6 +23,11 @@ import os, os.path, sys
 import tempfile, pickle, getopt
 import re
 
+if sys.hexversion < 0x02030000:
+   # The behavior of the pickle module changed significantly in 2.3
+   sys.stderr.write("hg-to-git.py: requires Python 2.3 or later.\n")
+   sys.exit(1)
+
 # Maps hg version -> git version
 hgvers = {}
 # List of children for each hg revision
diff --git a/contrib/p4import/git-p4import.py b/contrib/p4import/git-p4import.py
index b6e534b..593d6a0 100644
--- a/contrib/p4import/git-p4import.py
+++ b/contrib/p4import/git-p4import.py
@@ -14,6 +14,11 @@ import sys
 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
diff --git a/contrib/svn-fe/svnrdump_sim.py b/contrib/svn-fe/svnrdump_sim.py
index 1cfac4a..17cf6f9 100755
--- a/contrib/svn-fe/svnrdump_sim.py
+++ b/contrib/svn-fe/svnrdump_sim.py
@@ -7,6 +7,10 @@ to the highest revision that should be available.
 """
 import sys, os
 
+if sys.hexversion < 0x02040000:
+        # The limiter is the ValueError() calls. This may be too conservative
+        sys.stderr.write("svnrdump-sim.py: requires Python 2.4 or later.\n")
+        sys.exit(1)
 
 def getrevlimit():
         var = 'SVNRMAX'