Automate latest stable BBRv3 builds without debug packages

scripts/apply-bbrv3-port.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
+repo_root=$(cd -- "$script_dir/.." && pwd)
+
+kernel_version=$(awk '
+  /^VERSION[[:space:]]*=/ { version = $3 }
+  /^PATCHLEVEL[[:space:]]*=/ { patchlevel = $3 }
+  END {
+    if (version == "" || patchlevel == "") {
+      exit 1
+    }
+    print version "." patchlevel
+  }
+' Makefile)
+
+patch_file="${BBRV3_PATCH:-$repo_root/patches/bbrv3-linux-$kernel_version.patch}"
+
+if [[ ! -f "$patch_file" ]]; then
+  echo "BBRv3 patch not found for linux-$kernel_version.y: $patch_file" >&2
+  echo "Add a matching patches/bbrv3-linux-$kernel_version.patch before building this kernel series." >&2
+  exit 1
+fi
+
+git apply --check "$patch_file"
+git apply "$patch_file"
+
+if ! grep -q '^#define BBR_VERSION[[:space:]]*3' net/ipv4/tcp_bbr.c; then
+  echo "BBRv3 patch applied, but BBR_VERSION=3 was not found." >&2
+  exit 1
+fi
+
+echo "Applied BBRv3 port: $patch_file"