feat(tf): overriding backend settings

Author: fiftin

db/Template.go

@@ -76,10 +76,11 @@ type AnsibleTemplateParams struct {
 }
 
 type TerraformTemplateParams struct {
-	AllowDestroy     bool `json:"allow_destroy"`
-	AllowAutoApprove bool `json:"allow_auto_approve"`
-	AutoApprove      bool `json:"auto_approve"`
-	OverrideBackend  bool `json:"override_backend"` // override backend if internal backend is used
+	AllowDestroy     bool   `json:"allow_destroy,omitempty"`
+	AllowAutoApprove bool   `json:"allow_auto_approve,omitempty"`
+	AutoApprove      bool   `json:"auto_approve,omitempty"`
+	OverrideBackend  bool   `json:"override_backend,omitempty"` // override backend if internal backend is used
+	BackendFilename  string `json:"backend_filename,omitempty"`
 }
 
 type SurveyVarEnumValue struct {

db_lib/TerraformApp.go

@@ -199,8 +199,15 @@ func (t *TerraformApp) InstallRequirements(environmentVars []string, tplParams a
 	tpl := tplParams.(*db.TerraformTemplateParams)
 	p := params.(*db.TerraformTaskParams)
 
+	backendFilename := "backend.tf"
+	if tpl.BackendFilename != "" {
+		backendFilename = tpl.BackendFilename
+	}
+
+	backendFile := path.Join(t.GetFullPath(), backendFilename)
+
 	if tpl.OverrideBackend {
-		err = os.WriteFile(path.Join(t.GetFullPath(), "backend.tf"), []byte("terraform { backend \"http\" {} }"), 0644)
+		err = os.WriteFile(backendFile, []byte("terraform { backend \"http\" {} }"), 0644)
 		if err != nil {
 			return
 		}
@@ -211,7 +218,10 @@ func (t *TerraformApp) InstallRequirements(environmentVars []string, tplParams a
 	}
 
 	if tpl.OverrideBackend {
-		err = os.Remove(path.Join(t.GetFullPath(), "backend.tf"))
+		err = os.Remove(backendFile)
+		if os.IsNotExist(err) {
+			err = nil
+		}
 		if err != nil {
 			return
 		}

web/src/components/TemplateForm.vue

@@ -378,6 +378,25 @@
             v-if="needField('auto_approve')"
           />
 
+          <v-checkbox
+            class="mt-0"
+            :label="$t('terraform_override_backend')"
+            v-model="item.task_params.override_backend"
+            :true-value="true"
+            :false-value="false"
+            v-if="needField('override_backend')"
+          />
+
+          <v-text-field
+            v-model="item.task_params.backend_filename"
+            :label="fieldLabel('terraform_backend_filename')"
+            outlined
+            dense
+            :disabled="formSaving || !item.task_params.override_backend"
+            placeholder="backend.tf"
+            :rules="[v => validateBackendFilename(v) || $t('terraform_invalid_backend_filename')]"
+          ></v-text-field>
+
         </div>
 
         <h2 class="mb-4">
@@ -572,7 +591,7 @@ export default {
     },
 
     needAppBlock() {
-      return ['', 'ansible', 'ansible', 'tofu'].includes(this.app);
+      return ['', 'ansible', 'ansible', 'tofu', 'terraform'].includes(this.app);
     },
 
     surveyVars() {
@@ -605,6 +624,18 @@ export default {
   },
 
   methods: {
+    validateBackendFilename(v) {
+      if (!v) {
+        return true;
+      }
+
+      if (!v.endsWith('.tf')) {
+        return 'File must have extension .tf';
+      }
+
+      return /^[a-zA-Z0-9_\-.]+\.tf$/.test(v);
+    },
+
     setSkipTags(tags) {
       this.item.task_params.skip_tags = tags;
     },

web/src/lang/en.js

@@ -323,6 +323,9 @@ export default {
   // Terraform/OpenTofu/Terragrunt
   auto_approve: 'Auto approve',
   auto_destroy: 'Allow destroy',
+  terraform_override_backend: 'Override backend settings',
+  terraform_backend_filename: 'Backend filename (default: backend.tf)',
+  terraform_invalid_backend_filename: 'Invalid backend filename',
 
   // Ansible
   tag: 'Tag',

web/src/lib/constants.js

@@ -225,6 +225,12 @@ export const TERRAFORM_FIELDS = {
   allow_override_inventory: {
     label: 'allowInventoryInTask',
   },
+  override_backend: {
+    label: 'terraform_override_backend',
+  },
+  backend_filename: {
+    label: 'terraform_backend_filename',
+  },
 };
 
 export const UNKNOWN_APP_FIELDS = {