chore: add change base branch script

scripts/change_base_branch.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+set -e -o pipefail
+
+# Function to display help
+show_help() {
+    echo "Usage: $0 OLD_BASE NEW_BASE"
+    echo ""
+    echo "Change the base branch for all open PRs from OLD_BASE to NEW_BASE."
+    echo ""
+    echo "Arguments:"
+    echo "  OLD_BASE     The current base branch to change from."
+    echo "  NEW_BASE     The new base branch to change to."
+    echo ""
+    echo "Options:"
+    echo "  -h           Display this help message."
+}
+
+# Parse command-line options
+while getopts "h" opt; do
+    case $opt in
+        h) show_help
+           exit 0 ;;
+        \?) echo "Invalid option: -$OPTARG" >&2
+            show_help
+            exit 1 ;;
+    esac
+done
+
+# Shift the parsed options away to handle positional arguments
+shift $((OPTIND -1))
+
+# Check if the correct number of arguments are provided
+if [ "$#" -ne 2 ]; then
+    echo "Error: OLD_BASE and NEW_BASE are required."
+    show_help
+    exit 1
+fi
+
+# Assign positional arguments to variables
+old_base_branch="$1"
+new_base_branch="$2"
+
+# List PRs and change base branch
+prs=$(gh pr list --base "$old_base_branch" --json number --jq '.[].number')
+
+if [ -z "$prs" ]; then
+    echo "No PRs found with base branch '$old_base_branch'."
+    exit 0
+fi
+
+for pr in $prs; do
+    echo "Updating PR #$pr from base '$old_base_branch' to '$new_base_branch'..."
+    gh pr edit "$pr" --base "$new_base_branch"
+done
+
+echo "Base branch update complete."