cdktf: CDKTF init from Template Creates Duplicate/Missing Import Libs

[HackedRico]

Expected Behavior

After running the following CDKTF init command, it should produce a working main.ts file. ../vbox-terraform is an terraform project utilizing the VirtualBox Provider whereas initing from this project should have this provider in main.ts. Furthermore, there is an duplicate TerraformStack lib being imported which causes errors.

cdktf init --template=typescript \
    --from-terraform-project=../vbox-terraform \
    --local
    --providers=local

The result of the above command produces:

import { Construct } from "constructs";
import {
  VariableType,
  TerraformVariable,
  TerraformCount,
  TerraformOutput,
  Fn,
  TerraformStack, // Terraform Stack lib imported here already
} from "cdktf";
/*
 * Provider bindings are generated by running `cdktf get`.
 * See https://cdk.tf/provider-generation for more details.
 */
import { Vm } from "./.gen/providers/virtualbox/vm";
import { App, TerraformStack } from "cdktf"; // BUG: Duplicate Terraform Stack Import

import { VirtualboxProvider } from "./.gen/providers/virtualbox/provider";

class MyStack extends TerraformStack {
  constructor(scope: Construct, id: string) {
    super(scope, id);
    new VirtualboxProvider(this, "virtualbox", {});
    // existing code...
  }
}

Actual Behavior

A working main.ts to run cdktf deploy which does not have duplicate import of TerraformStack lib and has imported VirtualboxProvider lib.

Expected:

import { Construct } from "constructs";
import {
  VariableType,
  TerraformVariable,
  TerraformCount,
  TerraformOutput,
  Fn,
  TerraformStack,
} from "cdktf";
/*
 * Provider bindings are generated by running `cdktf get`.
 * See https://cdk.tf/provider-generation for more details.
 */
import { Vm } from "./.gen/providers/virtualbox/vm";
import { App } from "cdktf"; // Fix: Removed Duplicate TerraformStack Lib

import { VirtualboxProvider } from "./.gen/providers/virtualbox/provider";

class MyStack extends TerraformStack {
  constructor(scope: Construct, id: string) {
    super(scope, id);
    new VirtualboxProvider(this, "virtualbox", {});
    // existing code...
  }
}

Steps to Reproduce

1. Create a directory with a test Terraform Project, a simple test could be:

terraform {
  required_providers {
    virtualbox = {
      source = "terra-farm/virtualbox"
      version = "0.2.2-alpha.1"
    }
  }
}

provider "virtualbox" {}

resource "virtualbox_vm" "single_vm" {
  name      = "simple-vm"
  image     = "https://app.vagrantup.com/ubuntu/boxes/bionic64/versions/20180903.0.0/providers/virtualbox.box"
  cpus      = 2
  memory    = "1024 mib"

  network_adapter {
    type = "bridged"
    host_interface = "en0: Wi-Fi"
    device = "IntelPro1000MTServer"
  }
}

2. Run CDKTF init command on the created Terraform Project Directory

cdktf init --template=typescript \
    --from-terraform-project=<PATH-TO-TF-PROJECT> \
    --local
    --providers=local

3. View generated CDKTF directory's main.ts

Versions

cdktf debug
language: typescript
cdktf-cli: 0.21.0
node: v22.17.1
cdktf: 0.21.0
constructs: 10.4.2
jsii: null
terraform: 1.13.0
arch: x64
os: darwin 24.6.0
providers
terra-farm/virtualbox@0.2.2-alpha.1 (LOCAL)
        terraform provider version: 0.2.2-alpha.1
@cdktf/provider-local (PREBUILT)
        terraform provider version: 2.5.3 
        prebuilt provider version: 11.0.0
        cdktf version: ^0.21.0

Providers

┌───────────────────────┬──────────────────┬─────────┬───────────────┬───────────────────────┬─────────────────┐
│ Provider Name         │ Provider Version │ CDKTF   │ Constraint    │ Package Name          │ Package Version │
├───────────────────────┼──────────────────┼─────────┼───────────────┼───────────────────────┼─────────────────┤
│ terra-farm/virtualbox │ 0.2.2-alpha.1    │         │ 0.2.2-alpha.1 │                       │                 │
├───────────────────────┼──────────────────┼─────────┼───────────────┼───────────────────────┼─────────────────┤
│ local                 │ 2.5.3            │ ^0.21.0 │               │ @cdktf/provider-local │ 11.0.0          │
└───────────────────────┴──────────────────┴─────────┴───────────────┴───────────────────────┴─────────────────┘

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Possible Solutions

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Workarounds

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Anything Else?

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References

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• I'm interested in contributing a fix myself

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