1 files changed, 58 insertions, 0 deletions
diff --git a/scripts/hooks/pre-push.fixup-warn.sh b/scripts/hooks/pre-push.fixup-warn.sh
new file mode 100644
index 00000000..3ad7233e
--- /dev/null
+++ b/scripts/hooks/pre-push.fixup-warn.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+
+#
+# The following snippet can be used to WARN about "!fixup" / "WIP" / "TMP"
+# commits when pushing
+#
+# Aborting the push is possible
+#
+
+remote="$1"
+url="$2"
+
+z40=0000000000000000000000000000000000000000
+
+while read local_ref local_sha remote_ref remote_sha
+do
+    if [ "$local_sha" = $z40 ]
+    then
+        # Branch is deleted, nothing to check here, move along.
+    else
+        if [ "$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
+
+        # Check for WIP commit
+        commit=$(git rev-list -n 1 --grep '^WIP|^TMP|!fixup' "$range")
+        if [ -n "$commit" ]
+        then
+            echo >&2 "Found WIP commit in $local_ref, not pushing"
+
+            # TO NOT ONLY WARN BUT ABORT UNCOMMENT THE NEXT LINE
+            # exit 1
+        fi
+
+        # Check for commits without sign-off
+        if [ "$remote_sha" = $z40 ]; then
+            # New branch is pushed, we only want to check commits that are not
+            # on master.
+            range="$(git merge-base master "$local_sha")..$local_sha"
+        fi
+        while read ref; do
+            msg=$(git log -n 1 --format=%B "$ref")
+            if ! grep -q '^Signed-off-by: ' <<<"$msg"; then
+                echo >&2 "Unsigned commit $ref"
+                exit 1
+            fi
+        done < <(git rev-list "$range")
+        # The process substitution above is a hack to make sure loop runs in
+        # the same shell and can actually exit the whole script.
+    fi
+done
+
+exit 0