Support ancient Bash in bin/terraform-* scripts

Author: doshitan

bin/terraform-apply

@@ -44,4 +44,6 @@ if [ -f "${tf_vars_file}" ]; then
   tf_apply_args+=("-var-file=${tf_vars_file}")
 fi
 
-terraform apply "${tf_apply_args[@]}"
+# tf_apply_args oddness to support Bash < v4.4
+# https://stackoverflow.com/a/7577209
+terraform apply ${tf_apply_args[@]+"${tf_apply_args[@]}"}

bin/terraform-init-and-apply

@@ -17,4 +17,6 @@ rest_args=("${@:3}")
 
 ./bin/terraform-init "${module_dir}" "${config_name}"
 
-./bin/terraform-apply "${module_dir}" "${config_name}" "${rest_args[@]}"
+# rest_args oddness to support Bash < v4.4
+# https://stackoverflow.com/a/7577209
+./bin/terraform-apply "${module_dir}" "${config_name}" ${rest_args[@]+"${rest_args[@]}"}