chore: added possibility to use prefixed envs as parameter overrides

Author: radekl

action.yml

@@ -17,6 +17,9 @@ inputs:
   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" }]'
     required: false
+  envs-prefix-for-parameter-overrides:
+    description: 'Set environment variable key prefix to filter out and use as parameters to override. The prefix will be stripped.'
+    default: ""
   no-execute-changeset:
     description: "Indicates whether to execute to the change set or have it reviewed. Default to '0' (will execute the change set)"
     required: false

src/main.ts

@@ -43,6 +43,9 @@ export async function run(): Promise<void> {
     const parameterOverrides = core.getInput('parameter-overrides', {
       required: false
     })
+    const envsPrefixForparameterOverrides = core.getInput('envs-prefix-for-parameter-overrides', {
+      required: false
+    })
     const noEmptyChangeSet = !!+core.getInput('no-fail-on-empty-changeset', {
       required: false
     })
@@ -125,6 +128,16 @@ export async function run(): Promise<void> {
       params.Parameters = parseParameters(parameterOverrides.trim())
     }
 
+    if (envsPrefixForparameterOverrides.length > 0) {
+      params.Parameters?.concat(
+        Object.keys(process.env)
+          .filter(key => key.startsWith(envsPrefixForparameterOverrides))
+          .map(key => ({
+            ParameterKey: key,
+            ParameterValue: process.env[key]
+          })))
+    }
+
     const stackId = await deployStack(
       cfn,
       params,