From 9cbc7e18982ec75af0672f99c7450b925ecb5261 Mon Sep 17 00:00:00 2001
From: Mirotin Artem <ai.mirotin@gmail.com>
Date: Sat, 8 Aug 2026 01:27:34 +0300
Subject: [PATCH] fix(hooks): skip the pre-push suite on delete-only pushes
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Deleting a remote branch is a push, and the hook ran the full ~3-minute
gate for every deletion — cleaning 21 stale remote branches after the
P-series triggered it per branch until the batch timed out. A deletion
moves no code: git hands the hook local_ref="(delete)" with an all-zero
local sha, so treat those lines like the tag-only case and short-circuit.

Mixed pushes (a real ref + deletions) still run the suite, and an empty
stdin (dry-run) still falls through, as before. Verified by feeding the
hook synthetic stdin for all three scenarios.
---
 .githooks/pre-push | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/.githooks/pre-push b/.githooks/pre-push
index 9440c04e..f97db62d 100755
--- a/.githooks/pre-push
+++ b/.githooks/pre-push
@@ -13,13 +13,23 @@
 #   3. `git push --no-verify` — git's built-in escape hatch.
 set -e
 
-# ── Tag-only push short-circuit ──────────────────────────────────────────────
+# ── Tag-only / delete-only push short-circuit ────────────────────────────────
 # git passes one line per ref on stdin:
 #   <local-ref> <local-sha> <remote-ref> <remote-sha>
+# A branch DELETION arrives as local_ref="(delete)" with an all-zero
+# local_sha — no code moves, so it must not trigger the suite (observed
+# 2026-08-08: cleaning 21 stale remote branches ran the full gate per
+# deletion, ~3 min each).
 any_ref=0
 any_non_tag=0
-while read -r local_ref _local_sha _remote_ref _remote_sha; do
+any_delete=0
+while read -r local_ref local_sha _remote_ref _remote_sha; do
     [ -z "$local_ref" ] && continue
+    case "$local_ref,$local_sha" in
+        "(delete)",*|*,0000000000000000000000000000000000000000)
+            any_delete=1
+            continue ;;
+    esac
     any_ref=1
     case "$local_ref" in
         refs/tags/*) ;;
@@ -27,6 +37,13 @@ while read -r local_ref _local_sha _remote_ref _remote_sha; do
     esac
 done
 
+# Delete-only push: refs were listed but every one is a deletion.
+# Empty stdin (dry-run) still falls through to the suite, as before.
+if [ "$any_ref" = 0 ] && [ "$any_delete" = 1 ]; then
+    echo "=== Pre-push: delete-only push — skipping CI mirror checks ==="
+    exit 0
+fi
+
 if [ "$any_ref" = 1 ] && [ "$any_non_tag" = 0 ]; then
     echo "=== Pre-push: tag-only push — skipping CI mirror checks ==="
     exit 0