# cdk-solution-helper

A lightweight helper function that cleans-up synthesized templates from the AWS Cloud Development Kit (CDK) and prepares
them for use with the AWS Solutions publishing pipeline. This function performs the following tasks:

#### Nested stack template URL preparation

Replaces the `TemplateURL` generated by the AWS CDK with the location used by the AWS Solution.
The bucket name and key prefix are retrieved from the `SourceCode` mapping.

Before:

```
  "MediaInsightsDataplaneApiStack": {
    "Type": "AWS::CloudFormation::Stack",
    "Properties": {
      "TemplateURL": {
        "Fn::Join": [
         "",
         [
           "https://s3.",
           { "Ref": "AWS::Region" },
           ".",
           { "Ref": "AWS::URLSuffix" },
           "/",
           { "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}" },
           "/d20c2ae16e769c1e8fdb1465457252122f86dd10620491ded41616e7c9f9c0bf.json"
        ]
      ]
    },
```

After helper function run:

```
  "MediaInsightsDataplaneApiStack": {
    "Type": "AWS::CloudFormation::Stack",
    "Properties": {
      "TemplateURL": {
        "Fn::Join": [
          "",
          [
            "https://",
            { "Fn::FindInMap": [ "SourceCode", "General", "GlobalS3Bucket" ] },
            ".s3.",
            { "Ref": "AWS::URLSuffix" },
            "/",
            { "Fn::FindInMap": [ "SourceCode", "General", "TemplateKeyPrefix" ] },
            "/media-insights-dataplane-api-stack.template"
          ]
        ]
      },
```


#### Template cleanup

Cleans out parameters and metadata created by AWS CDK that help with `cdk deploy`, but aren't used in the
published CloudFormation templates. Also removes some "default policies" that get generated by AWS CDK but
are not actually referenced in the template.

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