chore: export values to SSM so those can be referenced from serverless

Author: skunxicat

README.md

@@ -17,21 +17,21 @@ Terraform module that creates a Lambda function with zip packaging, IAM executio
 ### Basic Usage with Template Generation
 
 ```hcl
-module "lambda_function" {
+module "lambda" {
   source = "git::https://github.com/ql4b/terraform-aws-lambda-function.git"
   
-  source_dir       = "./src"
+  source_dir       = "../app/src"
+  template_dir     = "../app/src"
   create_templates = true
-  template_dir     = "./src"
   
-  context = {
-    namespace = "myorg"
-    name      = "myfunction"
-  }
+  context    = module.label.context
+  attributes = ["lambda"]
 }
 ```
 
-This will automatically create `bootstrap`, `handler.sh`, and `Makefile` in your `./src` directory.
+This will automatically create `bootstrap`, `handler.sh`, and `Makefile` in your `../app/src` directory.
+
+**Note:** This module integrates seamlessly with any existing Terraform setup. The example above shows integration with CloudPosse labeling, but you can use it standalone or with any naming convention.
 
 ## Advanced Usage
 
@@ -64,6 +64,24 @@ module "lambda_function" {
 }
 ```
 
+## Integration with Existing Projects
+
+This module is designed to plug into any existing Terraform setup:
+
+```hcl
+# Add to your existing main.tf
+module "my_function" {
+  source = "git::https://github.com/ql4b/terraform-aws-lambda-function.git"
+  
+  source_dir       = "./lambda-src"
+  create_templates = true
+  template_dir     = "./lambda-src"
+  
+  # Use your existing naming/tagging strategy
+  context = var.context  # or however you handle naming
+}
+```
+
 ## Template Generation
 
 Set `create_templates = true` to automatically generate starter files:
@@ -132,16 +150,23 @@ terraform apply
 ### 2. Set Function Name
 
 ```bash
+# If using the module directly
 export FUNCTION_NAME=$(terraform output -raw function_name)
+
+# If using as a nested module (like in cloudless-minimal)
+export FUNCTION_NAME=$(tf output --json lambda | jq -r .function_name)
 ```
 
 ### 3. Use the Generated Makefile
 
 When `create_templates = true`, a `Makefile` is generated with deployment workflows:
 
 ```bash
-# Set function name
-export FUNCTION_NAME=$(terraform output -raw function_name)
+# Set function name (adjust based on your output structure)
+export FUNCTION_NAME=$(tf output --json lambda | jq -r .function_name)
+
+# Navigate to your source directory
+cd app/src
 
 # Deploy function code
 make deploy

main.tf

@@ -98,5 +98,30 @@ resource "aws_lambda_function" "this" {
     aws_cloudwatch_log_group.lambda_logs,
   ]
 
+  tags = module.this.tags
+}
+
+# SSM parameters for Serverless integration
+resource "aws_ssm_parameter" "function_name" {
+  name  = "/${module.this.id}/function_name"
+  type  = "String"
+  value = aws_lambda_function.this.function_name
+  
+  tags = module.this.tags
+}
+
+resource "aws_ssm_parameter" "function_arn" {
+  name  = "/${module.this.id}/function_arn"
+  type  = "String"
+  value = aws_lambda_function.this.arn
+  
+  tags = module.this.tags
+}
+
+resource "aws_ssm_parameter" "invoke_arn" {
+  name  = "/${module.this.id}/invoke_arn"
+  type  = "String"
+  value = aws_lambda_function.this.invoke_arn
+  
   tags = module.this.tags
 }

outputs.tf

@@ -80,4 +80,14 @@ output "template_files" {
     handler   = "${var.template_dir}/handler.sh"
     makefile  = "${var.template_dir}/Makefile"
   } : {}
+}
+
+# SSM parameter outputs
+output "ssm_parameters" {
+  description = "SSM parameter names for Serverless integration"
+  value = {
+    function_name = aws_ssm_parameter.function_name.name
+    function_arn  = aws_ssm_parameter.function_arn.name
+    invoke_arn    = aws_ssm_parameter.invoke_arn.name
+  }
 }