feat: Pass custom arguments to terraform init in terraform_validate…

… hook (antonbabenko#293)

README.md

@@ -526,7 +526,15 @@ Example:
         - --envs=AWS_SECRET_ACCESS_KEY="asecretkey"
     ```
 
-3. It may happen that Terraform working directory (`.terraform`) already exists but not in the best condition (eg, not initialized modules, wrong version of Terraform, etc.). To solve this problem, you can find and delete all `.terraform` directories in your repository:
+3. `terraform_validate` also supports passing custom arguments to its `terraform init`:
+
+    ```yaml
+    - id: terraform_validate
+      args:
+        - --init-args=-lockfile=readonly
+    ```
+
+4. It may happen that Terraform working directory (`.terraform`) already exists but not in the best condition (eg, not initialized modules, wrong version of Terraform, etc.). To solve this problem, you can find and delete all `.terraform` directories in your repository:
 
     ```bash
     echo "

terraform_validate.sh

@@ -30,7 +30,7 @@ initialize_() {
 
 parse_cmdline_() {
   declare argv
-  argv=$(getopt -o e:a: --long envs:,args: -- "$@") || return
+  argv=$(getopt -o e:i:a: --long envs:,init-args:,args: -- "$@") || return
   eval "set -- $argv"
 
   for argv; do
@@ -40,6 +40,11 @@ parse_cmdline_() {
         ARGS+=("$1")
         shift
         ;;
+      -i | --init-args)
+        shift
+        INIT_ARGS+=("$1")
+        shift
+        ;;
       -e | --envs)
         shift
         ENVS+=("$1")
@@ -87,7 +92,7 @@ terraform_validate_() {
 
       if [[ ! -d .terraform ]]; then
         set +e
-        init_output=$(terraform init -backend=false 2>&1)
+        init_output=$(terraform init -backend=false "${INIT_ARGS[@]}" 2>&1)
         init_code=$?
         set -e
 
@@ -123,6 +128,7 @@ terraform_validate_() {
 
 # global arrays
 declare -a ARGS
+declare -a INIT_ARGS
 declare -a ENVS
 declare -a FILES