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+#!/bin/sh
+
+# An example hook script to verify what is about to be pushed. Called by "git
+# push" after it has checked the remote status, but before anything has been
+# pushed. If this script exits with a non-zero status nothing will be pushed.
+#
+# This hook is called with the following parameters:
+#
+# $1 -- Name of the remote to which the push is being done
+# $2 -- URL to which the push is being done
+#
+# If pushing without using a named remote those arguments will be equal.
+#
+# Information about the commits which are being pushed is supplied as lines to
+# the standard input in the form:
+#
+# <local ref> <local oid> <remote ref> <remote oid>
+#
+# This sample shows how to prevent push of commits where the log message starts
+# with "WIP" (work in progress).
+
+remote="$1"
+url="$2"
+
+zero=$(git hash-object --stdin </dev/null | tr '[0-9a-f]' '0')
+
+while read local_ref local_oid remote_ref remote_oid
+do
+ if test "$local_oid" = "$zero"
+ then
+ # Handle delete
+ :
+ else
+ if test "$remote_oid" = "$zero"
+ then
+ # New branch, examine all commits
+ range="$local_oid"
+ else
+ # Update to existing branch, examine new commits
+ range="$remote_oid..$local_oid"
+ fi
+
+ # Check for WIP commit
+ commit=$(git rev-list -n 1 --grep '^WIP' "$range")
+ if test -n "$commit"
+ then
+ echo >&2 "Found WIP commit in $local_ref, not pushing"
+ exit 1
+ fi
+ fi
+done
+
+exit 0