feat: add a rebase helper script

scripts/sync-benchmark-bases.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+#
+# This script automates the process of updating benchmark branches against a
+# new base (usually 'main'). It iterates through a predefined list of
+# "old" benchmark branches and performs a git rebase for each.
+#
+# By default, the script runs in DRY_RUN mode. Use -f or --force to
+# execute the actual git commands.
+
+set -euo pipefail
+
+readonly OLD_BASES=(
+	# Normal branches (No Regression)
+	"bench-startup-normal"
+	"bench-scrollforyou-normal"
+	"bench-scrollforyou-mem-normal"
+
+	# Regression branches
+	"bench-startup-reg"
+	"bench-scrollforyou-reg"
+	"bench-scrollforyou-mem-reg"
+)
+
+NEW_BASE="main"
+
+DRY_RUN=true
+
+print_usage() {
+	cat <<EOF
+Usage: $(basename "$0") [OPTIONS]
+
+Automates rebasing benchmark branches onto a new base branch.
+
+Options:
+  -h, --help           Show this help message and exit
+  -f, --force          Disable dry-run mode and execute git commands
+  --new-base <base>    Specify the base branch to rebase onto (default: $NEW_BASE)
+EOF
+}
+
+while [[ $# -gt 0 ]]; do
+	case "$1" in
+	-h | --help)
+		print_usage
+		exit 0
+		;;
+	-f | --force)
+		DRY_RUN=false
+		shift
+		;;
+	--new-base)
+		NEW_BASE="$2"
+		shift 2
+		;;
+	*)
+		echo "$(basename "$0"): invalid option -- '$1'"
+		echo "Try '$(basename "$0") --help' for more information"
+		exit 1
+		;;
+	esac
+done
+
+if "${DRY_RUN}"; then
+	echo "info: running in dry run mode, the following commands will not be executed"
+	echo "info: use -f or --force to execute the actual git commands"
+fi
+
+for BASE in "${OLD_BASES[@]}"; do
+	if ${DRY_RUN}; then
+		echo "dry: git checkout ${BASE}"
+		echo "dry: git merge ${NEW_BASE}"
+	else
+		echo "git checkout ${BASE}"
+		git checkout "${BASE}"
+
+		echo "git merge ${NEW_BASE}"
+		git merge "${NEW_BASE}"
+	fi
+done