Re: [PATCH v2 2/3] push: Add support for pre-push hooks

Add support for a pre-push hook which can be used to determine if the
set of refs to be pushed is suitable for the target repository.  The
hook is run with two arguments specifying the name and location of the
destination repository.

Information about what is to be pushed is provided by sending lines of
the following form to the hook's standard input:

  <local ref> SP <local sha1> SP <remote ref> SP <remote sha1> LF

If the hook exits with a non-zero status, the push will be aborted.

This will allow the script to determine if the push is acceptable based
on the target repository and branch(es), the commits which are to be
pushed, and even the source branches in some cases.

Signed-off-by: Aaron Schrab <redacted>
---
 Documentation/githooks.txt |  29 ++++++++++
 builtin/push.c             |   1 +
 t/t5571-pre-push-hook.sh   | 129 +++++++++++++++++++++++++++++++++++++++++++++
 transport.c                |  60 +++++++++++++++++++++
 transport.h                |   1 +
 5 files changed, 220 insertions(+)
 create mode 100755 t/t5571-pre-push-hook.sh

diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index b9003fe..d839233 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt

@@ -176,6 +176,35 @@ save and restore any form of metadata associated with the working tree
 (eg: permissions/ownership, ACLS, etc).  See contrib/hooks/setgitperms.perl
 for an example of how to do this.
 
+pre-push
+~~~~~~~~
+
+This hook is called by 'git push' and can be used to prevent a push from taking
+place.  The hook is called with two parameters which provide the name and
+location of the destination remote, if a named remote is not being used both
+values will be the same.
+
+Information about what is to be pushed is provided on the hook's standard
+input with lines of the form:
+
+  <local ref> SP <local sha1> SP <remote ref> SP <remote sha1> LF
+
+For instance, if the command +git push origin master:foreign+ were run the

diff --git a/builtin/push.c b/builtin/push.c
index 8491e43..b158028 100644
--- a/builtin/push.c
+++ b/builtin/push.c

@@ -407,6 +407,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 		OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 		OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 			TRANSPORT_PUSH_PRUNE),
+		OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
 		OPT_END()
 	};