feat: adds includeNoEnvironment option for app-config validate

Author: joelgallant

app-config-cli/src/index.ts

@@ -469,13 +469,18 @@ export const cli = yargs
             description: 'Validates only using one environment',
             group: OptionGroups.Options,
           },
+          includeNoEnvironment: {
+            type: 'boolean',
+            description: 'Validates config with no environment selected',
+            group: OptionGroups.Options,
+          },
         },
       },
-      async ({ environment }) => {
+      async ({ environment, includeNoEnvironment }) => {
         if (environment) {
           await loadValidatedConfig({ environmentOverride: environment });
         } else {
-          await validateAllConfigVariants();
+          await validateAllConfigVariants({ includeNoEnvironment });
         }
       },
     ),

app-config-cli/src/validation.ts

@@ -6,11 +6,13 @@ import { loadValidatedConfig } from '@app-config/config';
 export interface Options {
   directory?: string;
   environmentAliases?: EnvironmentAliases;
+  includeNoEnvironment?: boolean;
 }
 
 export async function validateAllConfigVariants({
   directory = '.',
   environmentAliases = defaultAliases,
+  includeNoEnvironment = false,
 }: Options = {}) {
   // first, we have to find any applicable app-config files
   // this is less trivial than config loading, because we can't "assume" the current environment (it could be anything)
@@ -68,4 +70,13 @@ export async function validateAllConfigVariants({
       environmentVariableName: '', // do not load APP_CONFIG
     });
   }
+
+  if (includeNoEnvironment || appConfigEnvironments.size === 0) {
+    logger.info(`Validating configuration for no environment`);
+
+    await loadValidatedConfig({
+      directory,
+      environmentVariableName: '', // do not load APP_CONFIG
+    });
+  }
 }