chore: Improved code structure (moved hooks into a separate dir) (#316)

hooks/terragrunt_validate.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+# shellcheck disable=SC2155 # No way to assign to readonly variable in separate lines
+readonly SCRIPT_DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
+# shellcheck source=_common.sh
+. "$SCRIPT_DIR/_common.sh"
+
+function main {
+  common::initialize "$SCRIPT_DIR"
+  common::parse_cmdline "$@"
+  # shellcheck disable=SC2153 # False positive
+  common::per_dir_hook "${ARGS[*]}" "${FILES[@]}"
+}
+
+function per_dir_hook_unique_part {
+  # common logic located in common::per_dir_hook
+  local -r args="$1"
+  # shellcheck disable=SC2034 # Unused var.
+  local -r dir_path="$2"
+
+  # pass the arguments to hook
+  # shellcheck disable=SC2068 # hook fails when quoting is used ("$arg[@]")
+  terragrunt validate ${args[@]}
+
+  # return exit code to common::per_dir_hook
+  local exit_code=$?
+  return $exit_code
+}
+
+[ "${BASH_SOURCE[0]}" != "$0" ] || main "$@"