diff --git a/terraform_validate.sh b/terraform_validate.sh
index 3b44ed77f..8c307301a 100755
--- a/terraform_validate.sh
+++ b/terraform_validate.sh
@@ -1,50 +1,115 @@
 #!/usr/bin/env bash
 set -e
 
-declare -a paths
-index=0
-error=0
+main() {
+  initialize_
+  parse_cmdline_ "$@"
+  terraform_validate_
+}
 
-for file_with_path in "$@"; do
-  file_with_path="${file_with_path// /__REPLACED__SPACE__}"
+initialize_() {
+  # get directory containing this script
+  local dir
+  local source
+  source="${BASH_SOURCE[0]}"
+  while [[ -h $source ]]; do # resolve $source until the file is no longer a symlink
+    dir="$( cd -P "$( dirname "$source" )" >/dev/null && pwd )"
+    source="$(readlink "$source")"
+     # if $source was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+    [[ $source != /* ]] && source="$dir/$source"
+  done
+  _SCRIPT_DIR="$(dirname "$source")"
 
-  paths[index]=$(dirname "$file_with_path")
-  (("index+=1"))
-done
+  # source getopt function
+  # shellcheck source=lib_getopt
+  . "$_SCRIPT_DIR/lib_getopt"
+}
 
-for path_uniq in $(echo "${paths[*]}" | tr ' ' '\n' | sort -u); do
-  path_uniq="${path_uniq//__REPLACED__SPACE__/ }"
+parse_cmdline_() {
+  declare argv
+  argv=$(getopt -o e:a: --long envs:args: -- "$@") || return
+  eval "set -- $argv"
 
-  if [[ -n "$(find $path_uniq -maxdepth 1 -name '*.tf' -print -quit)" ]]; then
+  for argv; do
+    case $argv in
+      -a | --args)
+        shift
+        ARGS+=("$1")
+        shift
+        ;;
+      -e | --envs)
+        shift
+        ENVS+=("$1")
+        shift
+        ;;
+      --)
+        shift
+        FILES=("$@")
+        break
+        ;;
+    esac
+  done
+}
 
-    starting_path=$(realpath "$path_uniq")
-    terraform_path="$path_uniq"
+terraform_validate_() {
 
-    # Find the relevant .terraform directory (indicating a 'terraform init'),
-    # but fall through to the current directory.
-    while [[ "$terraform_path" != "." ]]; do
-      if [[ -d "$terraform_path/.terraform" ]]; then
-        break
-      else
-        terraform_path=$(dirname "$terraform_path")
+  # Setup environment variables
+  for var in "${ENVS[@]}"; do
+    export "${!var}"
+  done
+
+  declare -a paths
+  index=0
+  error=0
+
+  for file_with_path in "${FILES[@]}"; do
+    file_with_path="${file_with_path// /__REPLACED__SPACE__}"
+
+    paths[index]=$(dirname "$file_with_path")
+    ((index+=1))
+  done
+
+  for path_uniq in $(echo "${paths[*]}" | tr ' ' '\n' | sort -u); do
+    path_uniq="${path_uniq//__REPLACED__SPACE__/ }"
+
+    if [[ -n "$(find "$path_uniq" -maxdepth 1 -name '*.tf' -print -quit)" ]]; then
+
+      starting_path=$(realpath "$path_uniq")
+      terraform_path="$path_uniq"
+
+      # Find the relevant .terraform directory (indicating a 'terraform init'),
+      # but fall through to the current directory.
+      while [[ $terraform_path != "." ]]; do
+        if [[ -d $terraform_path/.terraform ]]; then
+          break
+        else
+          terraform_path=$(dirname "$terraform_path")
+        fi
+      done
+
+      validate_path="${path_uniq#"$terraform_path"}"
+
+      # Change to the directory that has been initialized, run validation, then
+      # change back to the starting directory.
+      cd "$(realpath "$terraform_path")"
+      if ! terraform validate "${ARGS[@]}" "$validate_path"; then
+        error=1
+        echo
+        echo "Failed path: $path_uniq"
+        echo "================================"
       fi
-    done
-
-    validate_path="${path_uniq#"$terraform_path"}"
-
-    # Change to the directory that has been initialized, run validation, then
-    # change back to the starting directory.
-    cd "$(realpath "$terraform_path")"
-    if ! terraform validate $validate_path; then
-      error=1
-      echo
-      echo "Failed path: $path_uniq"
-      echo "================================"
+      cd "$starting_path"
     fi
-    cd "$starting_path"
+  done
+
+  if [[ $error -ne 0 ]]; then
+    exit 1
   fi
-done
+}
+
+# global arrays
+declare -a ARGS
+declare -a ENVS
+declare -a FILES
 
-if [[ "${error}" -ne 0 ]]; then
-  exit 1
-fi
+[[ ${BASH_SOURCE[0]} != "$0" ]] || main "$@"