Include first 10 errors in exception message

Author: mbg

lib/init-action.js

@@ -457,6 +457,8 @@ test("parseUserConfig - throws a ConfigurationError if validation fails", (t) =>
       ),
     {
       instanceOf: ConfigurationError,
+      message:
+        'The configuration file "test" is invalid: instance.queries is not of a type(s) array.',
     },
   );
 

src/config/db-config.test.ts

@@ -506,7 +506,7 @@ export function parseUserConfig(
       throw new ConfigurationError(
         errorMessages.getInvalidConfigFileMessage(
           pathInput,
-          `There are ${result.errors.length} error(s)`,
+          result.errors.map((e) => e.stack),
         ),
       );
     }

src/config/db-config.ts

@@ -23,9 +23,11 @@ export function getConfigFileParseErrorMessage(
 
 export function getInvalidConfigFileMessage(
   configFile: string,
-  detail: string,
+  messages: string[],
 ): string {
-  return `The configuration file "${configFile}" is invalid: ${detail}`;
+  const andMore =
+    messages.length > 10 ? `, and ${messages.length - 10} more.` : ".";
+  return `The configuration file "${configFile}" is invalid: ${messages.slice(0, 10).join(", ")}${andMore}`;
 }
 
 export function getConfigFileRepoFormatInvalidMessage(