Change so that parameter-overrides is allow to use native yaml for github actions

Author: egut

README.md

@@ -24,12 +24,22 @@ A few inputs are highlighted below. See [action.yml](action.yml) for the full do
 
 #### parameter-overrides (OPTIONAL)
 
-To override parameter values in the template you can provide a string or a file that is either local or an URL.
+To override parameter values in the template you can provide a string, a file that is either local or an URL, or a native YAML object.
 
 Override multiple parameters separated by commas: `"MyParam1=myValue1,MyParam2=myValue2"`
 
 Override a comma delimited list: `"MyParam1=myValue1,MyParam1=myValue2"` or `MyParam1="myValue1,myValue2"`
 
+Override parameters using a native YAML object:
+```yaml
+parameter-overrides:
+  MyParam1: myValue1
+  MyParam2: myValue2
+  MyListParam:
+    - item1
+    - item2
+```
+
 Override parameters using a local JSON file: `"file:///${{ github.workspace }}/parameters.json"` with a file named `parameters.json` at the root of the repository:
 ```json
 [

action.yml

@@ -15,7 +15,7 @@ inputs:
     required: false
     default: "CAPABILITY_IAM"
   parameter-overrides:
-    description: 'The parameters to override in the stack inputs. You can pass a comma-delimited list or a file URL. Comma-delimited list has each entry formatted as <ParameterName>=<ParameterValue> or <ParameterName>="<ParameterValue>,<ParameterValue>". A JSON file can be a local file with a "file://" prefix or remote URL. The file should look like: [ { "ParameterKey": "KeyPairName", "ParameterValue": "MyKey" }]'
+    description: 'The parameters to override in the stack inputs. You can pass a comma-delimited list, a file URL, or a native YAML object. Comma-delimited list has each entry formatted as <ParameterName>=<ParameterValue> or <ParameterName>="<ParameterValue>,<ParameterValue>". A JSON file can be a local file with a "file://" prefix or remote URL. The file should look like: [ { "ParameterKey": "KeyPairName", "ParameterValue": "MyKey" }]. For YAML objects, provide parameter keys and values directly in the YAML structure.'
     required: false
   no-execute-changeset:
     description: "Indicates whether to execute to the change set or have it reviewed. Default to '0' (will execute the change set)"

src/main.ts

@@ -54,9 +54,23 @@ export async function run(): Promise<void> {
       .split(',')
       .map(capability => capability.trim()) as Capability[]
 
-    const parameterOverrides = core.getInput('parameter-overrides', {
+    // Get parameter overrides - could be a string or a parsed YAML object
+    const rawParameterOverrides = core.getInput('parameter-overrides', {
       required: false
     })
+    // Try to parse as JSON in case it's a YAML object that was auto-converted to JSON
+    let parameterOverrides: string | Record<string, any> = rawParameterOverrides
+    try {
+      if (rawParameterOverrides) {
+        const possibleObject = JSON.parse(rawParameterOverrides)
+        if (possibleObject && typeof possibleObject === 'object') {
+          parameterOverrides = possibleObject
+        }
+      }
+    } catch (e) {
+      // If parsing fails, use the raw string value
+      core.debug('Parameter overrides is not a JSON object, using as string')
+    }
     const noEmptyChangeSet = !!+core.getInput('no-fail-on-empty-changeset', {
       required: false
     })

src/utils.ts

@@ -37,7 +37,24 @@ export function parseNumber(s: string): number | undefined {
   return parseInt(s) || undefined
 }
 
-export function parseParameters(parameterOverrides: string): Parameter[] {
+export function parseParameters(parameterOverrides: string | Record<string, any>): Parameter[] {
+  // Case 1: Handle native YAML objects
+  if (parameterOverrides && typeof parameterOverrides !== 'string') {
+    return Object.keys(parameterOverrides).map(key => {
+      const value = parameterOverrides[key]
+      return {
+        ParameterKey: key,
+        ParameterValue: typeof value === 'string' ? value : JSON.stringify(value)
+      }
+    })
+  }
+  
+  // Case 2: Empty string
+  if (!parameterOverrides) {
+    return []
+  }
+
+  // Case 3: URL to JSON file
   try {
     const path = new URL(parameterOverrides)
     const rawParameters = fs.readFileSync(path, 'utf-8')
@@ -50,6 +67,7 @@ export function parseParameters(parameterOverrides: string): Parameter[] {
     }
   }
 
+  // Case 4: String format "key=value,key2=value2"
   const parameters = new Map<string, string>()
   parameterOverrides
     .split(/,(?=(?:(?:[^"']*["|']){2})*[^"']*$)/g)