Example of synth output from `cdk synth` when writing CDK in Ruby

1-aws-cdk.diff

diff --git a/packages/aws-cdk-lib/package.json b/packages/aws-cdk-lib/package.json
index 8420c94bc5..bdd75dd017 100644
--- a/packages/aws-cdk-lib/package.json
+++ b/packages/aws-cdk-lib/package.json
@@ -66,6 +66,10 @@
     "tsconfig": "tsconfig.json",
     "outdir": "dist",
     "targets": {
+      "ruby": {
+        "gem": "aws-cdk-lib",
+        "module": "AWSCDK"
+      },
       "dotnet": {
         "namespace": "Amazon.CDK",
         "packageId": "Amazon.CDK.Lib",

2-constructs.diff

diff --git a/package.json b/package.json
index 456844a..788dd98 100644
--- a/package.json
+++ b/package.json
@@ -143,6 +143,10 @@
       },
       "go": {
         "moduleName": "github.com/aws/constructs-go"
+      },
+      "ruby": {
+        "gem": "constructs",
+        "module": "Constructs"
       }
     },
     "tsc": {

3-Gemfile

source 'https://rubygems.org'

gem 'constructs', path: '../constructs/dist/ruby'
gem 'aws-cdk-lib', path: '../aws-cdk/packages/aws-cdk-lib/dist/ruby'
gem 'aws-cdk-asset-awscli-v1', path: '../aws-cdk/node_modules/@aws-cdk/asset-awscli-v1/dist/ruby'
gem 'aws-cdk-asset-node-proxy-agent-v6', path: '../aws-cdk/node_modules/@aws-cdk/asset-node-proxy-agent-v6/dist/ruby'
gem 'aws-cdk-cloud-assembly-schema', path: '../aws-cdk/node_modules/@aws-cdk/cloud-assembly-schema/dist/ruby'

4-main.rb

require 'aws-cdk-lib'

class MyCustomStack < AWSCDK::Stack
  def initialize(scope, id, props = nil)
    super(scope, id, props)
    AWSCDK::AWSS3::Bucket.new(self, 'MyBucket', {
      versioned: true
    })
  end
end

app = AWSCDK::App.new
MyCustomStack.new(app, 'MyStack')

app.synth

5-cdk-synth.out

Resources:
  MyBucketF68F3FF0:
    Type: AWS::S3::Bucket
    Properties:
      VersioningConfiguration:
        Status: Enabled
    UpdateReplacePolicy: Retain
    DeletionPolicy: Retain
    Metadata:
      aws:cdk:path: MyStack/MyBucket/Resource
  CDKMetadata:
    Type: AWS::CDK::Metadata
    Properties:
      Analytics: v2:deflate64:H4sIAAAAAAAA/zPQM9AzUEwsL9ZNTsnWzclM0qsOLklMztZJLC+OLzbWq3YqTc5OLdFxTsuDsGprdfLyU1L1sor1y4xM9AxN9QwUs4ozM3WLSvNKMnNT9YIgNAAy+cp+WQAAAA==
    Metadata:
      aws:cdk:path: MyStack/CDKMetadata/Default
    Condition: CDKMetadataAvailable
Conditions:
  CDKMetadataAvailable:
    Fn::Or:
      - Fn::Or:
          - Fn::Equals:
              - Ref: AWS::Region
              - af-south-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-east-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-northeast-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-northeast-2
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-northeast-3
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-south-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-south-2
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-southeast-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-southeast-2
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-southeast-3
      - Fn::Or:
          - Fn::Equals:
              - Ref: AWS::Region
              - ap-southeast-4
          - Fn::Equals:
              - Ref: AWS::Region
              - ca-central-1
          - Fn::Equals:
              - Ref: AWS::Region
              - ca-west-1
          - Fn::Equals:
              - Ref: AWS::Region
              - cn-north-1
          - Fn::Equals:
              - Ref: AWS::Region
              - cn-northwest-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-central-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-central-2
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-north-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-south-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-south-2
      - Fn::Or:
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-west-1
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-west-2
          - Fn::Equals:
              - Ref: AWS::Region
              - eu-west-3
          - Fn::Equals:
              - Ref: AWS::Region
              - il-central-1
          - Fn::Equals:
              - Ref: AWS::Region
              - me-central-1
          - Fn::Equals:
              - Ref: AWS::Region
              - me-south-1
          - Fn::Equals:
              - Ref: AWS::Region
              - sa-east-1
          - Fn::Equals:
              - Ref: AWS::Region
              - us-east-1
          - Fn::Equals:
              - Ref: AWS::Region
              - us-east-2
          - Fn::Equals:
              - Ref: AWS::Region
              - us-west-1
      - Fn::Equals:
          - Ref: AWS::Region
          - us-west-2
Parameters:
  BootstrapVersion:
    Type: AWS::SSM::Parameter::Value<String>
    Default: /cdk-bootstrap/hnb659fds/version
    Description: Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]