Test local changes to the terraform-provider-ko against a real registry.

Prerequisites

The test uses ttl.sh, a free ephemeral container registry that requires no authentication. Images pushed there expire automatically.

Steps

•

Build the provider and install to local mirror:

bash

go build -o ~/.terraform.d/plugins/registry.terraform.io/ko-build/ko/0.0.100/darwin_arm64/terraform-provider-ko .

•

Create a temporary test directory with a minimal Terraform config:

bash

TEST_DIR=$(mktemp -d)
cat > "$TEST_DIR/main.tf" << 'EOF'
terraform {
  required_providers {
    ko = {
      source  = "ko-build/ko"
      version = "0.0.100"
    }
  }
}

provider "ko" {
  repo = "ttl.sh/terraform-provider-ko-test"
}

resource "ko_build" "test" {
  importpath = "github.com/google/ko"
}

output "image_ref" {
  value = ko_build.test.image_ref
}
EOF
echo "Test directory: $TEST_DIR"

•

Initialise Terraform:

bash

cd "$TEST_DIR" && rm -f .terraform.lock.hcl && terraform init

•

Run terraform plan:

bash

cd "$TEST_DIR" && terraform plan -out tf.out

•

If the plan looks good, apply it:

bash

cd "$TEST_DIR" && terraform apply tf.out

•
Verify the image was pushed by checking the output shows a valid image reference.

•

Clean up (removes test directory and provider from local mirror):

bash

rm -rf "$TEST_DIR"
rm -f ~/.terraform.d/plugins/registry.terraform.io/ko-build/ko/0.0.100/darwin_arm64/terraform-provider-ko

Debugging

To see detailed provider logs, set TF_LOG=TRACE:

bash

cd "$TEST_DIR" && TF_LOG=TRACE terraform apply -auto-approve 2>&1 | tee /tmp/ko-provider-test.log

Then examine the logs:

bash

less /tmp/ko-provider-test.log