feat: Add SnowDDL to Terraform generator command [v0.3]

[db-tycoon-stephen]

Summary

Adds uv run generate-terraform command that converts SnowDDL YAML configurations into Terraform HCL files with import blocks for seamless migration to Terraform-managed infrastructure.

Closes #24

Features

• Full config coverage: Converts all SnowDDL config types to Terraform resources

  • Warehouses → snowflake_warehouse
  • Users → snowflake_user
  • Tech/Business Roles → snowflake_account_role
  • Grants → snowflake_grant_privileges_to_account_role
  • Network/Auth/Password/Session Policies → respective policy resources
  • Resource Monitors → snowflake_resource_monitor
  • Databases/Schemas → snowflake_database, snowflake_schema

• Import blocks: Generates Terraform 1.5+ import blocks for all existing resources

• Organized output: Creates structured file layout (main.tf, variables.tf, etc.)

• Grant expansion: Expands SnowDDL's compact grant format into individual Terraform resources

Usage

# Preview to stdout
uv run generate-terraform

# Generate to directory
uv run generate-terraform --output terraform/

# Then migrate with:
cd terraform/
terraform init
terraform plan    # Review imports
terraform apply   # Import existing resources

Example Output

SnowDDL input:

MAIN_WAREHOUSE:
  auto_suspend: 60
  size: X-Small
  resource_monitor: DEV_MONITOR

Terraform output:

resource "snowflake_warehouse" "main_warehouse" {
  name             = "MAIN_WAREHOUSE"
  warehouse_size   = "XSMALL"
  auto_suspend     = 60
  auto_resume      = true
  resource_monitor = snowflake_resource_monitor.dev_monitor.name
}

import {
  to = snowflake_warehouse.main_warehouse
  id = "MAIN_WAREHOUSE"
}

Test plan

• All 22 new tests pass
• Existing 333 tests still pass
• Command works from project root
• Output files are valid HCL structure
• Import blocks generated correctly

🤖 Generated with Claude Code