[PATCH] git-p4: do not pass '-r 0' to p4 commands

[Igor Kushnir <igorkuo@gmail.com>]

git-p4 crashes when used with a very old p4 client version
that does not support the '-r <number>' option in its commands.

Allow making git-p4 work with old p4 clients by setting git-p4.retries to 0.

Alternatively git-p4.retries could be made opt-in.
But since only very old, barely maintained p4 versions don't support
the '-r' option, the setting-retries-to-0 workaround would do.

The "-r retries" option is present in Perforce 2012.2 Command Reference,
but absent from Perforce 2012.1 Command Reference.

Signed-off-by: Igor Kushnir <igorkuo@gmail.com>
---
 Documentation/git-p4.txt | 1 +
 git-p4.py                | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/git-p4.txt b/Documentation/git-p4.txt
index bae862ddc..f4f1be5be 100644
--- a/Documentation/git-p4.txt
+++ b/Documentation/git-p4.txt
@@ -479,6 +479,7 @@ git-p4.client::
 git-p4.retries::
 	Specifies the number of times to retry a p4 command (notably,
 	'p4 sync') if the network times out. The default value is 3.
+	'-r 0' is not passed to p4 commands if this option is set to 0.
 
 Clone and sync variables
 ~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/git-p4.py b/git-p4.py
index 22e3f57e7..e5a9e1cce 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -83,7 +83,9 @@ def p4_build_cmd(cmd):
     if retries is None:
         # Perform 3 retries by default
         retries = 3
-    real_cmd += ["-r", str(retries)]
+    if retries != 0:
+        # Provide a way to not pass this option by setting git-p4.retries to 0
+        real_cmd += ["-r", str(retries)]
 
     if isinstance(cmd,basestring):
         real_cmd = ' '.join(real_cmd) + ' ' + cmd
-- 
2.11.0