Enable strict checking of config during CLI.

Signed-off-by: Aramis Sennyey <sennyeya@amazon.com>

packages/cli/cli-report.md

@@ -58,6 +58,7 @@ Options:
   --lax
   --frontend
   --deprecated
+  --strict
   --config <path>
   -h, --help
 ```

packages/cli/src/commands/config/validate.ts

@@ -24,5 +24,6 @@ export default async (opts: OptionValues) => {
     mockEnv: opts.lax,
     fullVisibility: !opts.frontend,
     withDeprecatedKeys: opts.deprecated,
+    strict: opts.strict,
   });
 };

packages/cli/src/commands/index.ts

@@ -345,6 +345,10 @@ export function registerCommands(program: Command) {
     .option('--lax', 'Do not require environment variables to be set')
     .option('--frontend', 'Only validate the frontend configuration')
     .option('--deprecated', 'Output deprecated configuration settings')
+    .option(
+      '--strict',
+      'Enable strict config validation, forbidding errors and unknown errors',
+    )
     .option(...configOption)
     .description(
       'Validate that the given configuration loads and matches schema',

packages/cli/src/lib/config.ts

@@ -32,6 +32,7 @@ type Options = {
   withFilteredKeys?: boolean;
   withDeprecatedKeys?: boolean;
   fullVisibility?: boolean;
+  strict?: boolean;
 };
 
 export async function loadCliConfig(options: Options) {
@@ -70,6 +71,7 @@ export async function loadCliConfig(options: Options) {
     dependencies: localPackageNames,
     // Include the package.json in the project root if it exists
     packagePaths: [paths.resolveTargetRoot('package.json')],
+    noUndeclaredProperties: options.strict,
   });
 
   const { appConfigs } = await loadConfig({
@@ -93,6 +95,7 @@ export async function loadCliConfig(options: Options) {
         : ['frontend'],
       withFilteredKeys: options.withFilteredKeys,
       withDeprecatedKeys: options.withDeprecatedKeys,
+      ignoreSchemaErrors: !options.strict,
     });
     const frontendConfig = ConfigReader.fromConfigs(frontendAppConfigs);