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-rwxr-xr-xetc/git/pre-push57
1 files changed, 57 insertions, 0 deletions
diff --git a/etc/git/pre-push b/etc/git/pre-push
new file mode 100755
index 0000000000..c894c5a9ec
--- /dev/null
+++ b/etc/git/pre-push
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+# This hook script prevents the user from pushing to Savannah if any of the new
+# commits' OpenPGP signatures cannot be verified.
+
+# 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 sha1> <remote ref> <remote sha1>
+
+z40=0000000000000000000000000000000000000000
+
+# Only use the hook when pushing to Savannah.
+case "$2" in
+*git.sv.gnu.org*)
+ break
+ ;;
+*)
+ exit 0
+ ;;
+esac
+
+while read local_ref local_sha remote_ref remote_sha
+do
+ if [ "$local_sha" = $z40 ]
+ then
+ # Handle delete
+ :
+ else
+ if [ "$remote_sha" = $z40 ]
+ then
+ # New branch, examine all commits
+ range="$local_sha"
+ else
+ # Update to existing branch, examine new commits
+ range="$remote_sha..$local_sha"
+ fi
+
+ # Verify the signatures of all commits being pushed.
+ git verify-commit $(git rev-list $range) >/dev/null 2>&1
+
+ exit $?
+ fi
+done
+
+exit 0