added install_tgswitch.sh

install/install_tgswitch.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+#  vim:ts=4:sts=4:sw=4:et
+#
+#  Author: Hari Sekhon
+#  Date: 2025-01-08 12:54:27 +0700 (Wed, 08 Jan 2025)
+#
+#  https///github.com/HariSekhon/DevOps-Bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+#
+#  https://www.linkedin.com/in/HariSekhon
+#
+
+set -euo pipefail
+[ -n "${DEBUG:-}" ] && set -x
+srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck disable=SC1090,SC1091
+. "$srcdir/lib/utils.sh"
+
+# shellcheck disable=SC2034,SC2154
+usage_description="
+Installs tgswitch for managing Terragrunt versions
+"
+
+# used by usage() in lib/utils.sh
+# shellcheck disable=SC2034
+usage_args=""
+
+help_usage "$@"
+
+num_args 1 "$@"
+
+if is_mac; then
+    brew install warrensbox/tap/tgswitch
+else
+    curl -L https://raw.githubusercontent.com/warrensbox/tgswitch/release/install.sh | bash
+fi
+
+echo
+echo -n "Terragrunt "
+tgswitch --version