Add feature for contextKey value for nested context (opensearch-proje…

…ct#126)

Signed-off-by: Andre Kurait <[email protected]>

README.md

@@ -39,6 +39,7 @@ In order to deploy both the stacks the user needs to provide a set of required a
 
 | Name                          | Requirement | Type      | Description |
 |-------------------------------|:------------|:----------|:------------|
+| contextKey                    | Optional    | string    | A top-level key that the rest of the parameters can be nested within for organized configuration. This is used to parse config from a specific key in the `cdk.context.json` or in the `context` block in the `cdk.json` file. |
 | distVersion                   | Required    | string    | The OpenSearch distribution version (released/un-released) the user wants to deploy |
 | securityDisabled              | Required    | boolean   | Enable or disable security plugin |
 | adminPassword                 | Optionally required    | string    | This value is required when security plugin is enabled and the cluster version is greater or equal to `2.12.0`|
@@ -109,6 +110,26 @@ cdk synth "*" --context securityDisabled=false \
 --context distVersion=2.3.0 --context serverAccessType=ipv4 --context restrictServerAccessTo=10.10.10.10/32
 ```
 
+Alternatively, you can use the `contextKey` to provide the configuration.
+
+For example, to synthesize the CloudFormation templates using a context key:
+```sh
+cdk synth "*" --context contextKey=devConfig
+```
+You would include the configuration in your `cdk.json` file like this:
+```js
+// cdk.json
+{
+  "context": {
+    "devConfig": {
+      "securityDisabled": false,
+      // ...
+    }
+  }
+}
+```
+This approach allows you to manage multiple configurations easily by defining different context keys for each environment.
+
 #### Sample command to set up multi-node cluster with security enabled on x64 AL2 machine
 
 Please note that as of now we only support instances backed by Amazon Linux-2 amis.

bin/app.ts

@@ -12,6 +12,17 @@ import { InfraStack } from '../lib/infra/infra-stack';
 import { NetworkStack } from '../lib/networking/vpc-stack';
 
 const app = new App();
+
+const contextKey = app.node.tryGetContext('contextKey');
+if (contextKey) {
+  const nestedContext = app.node.tryGetContext(contextKey);
+  if (nestedContext && typeof nestedContext === 'object') {
+    Object.entries(nestedContext).forEach(([nestedKey, nestedValue]) => {
+      app.node.setContext(nestedKey, nestedValue);
+    });
+  }
+}
+
 const region = app.node.tryGetContext('region') ?? process.env.CDK_DEFAULT_REGION;
 const account = app.node.tryGetContext('account') ?? process.env.CDK_DEFAULT_ACCOUNT;