Move support code into loadUserConfig()

Author: cklin

src/config-utils.ts

@@ -593,12 +593,24 @@ export function amendInputConfigFile(
   }
 }
 
+/**
+ * Load user configuration from a file or return an empty configuration
+ * if no config file is specified.
+ */
 async function loadUserConfig(
-  configFile: string,
+  configFile: string | undefined,
   workspacePath: string,
   apiDetails: api.GitHubApiCombinedDetails,
   tempDir: string,
+  logger: Logger,
 ): Promise<UserConfig> {
+  if (!configFile) {
+    logger.debug("No configuration file was provided");
+    return {};
+  }
+
+  logger.debug(`Using configuration file: ${configFile}`);
+
   if (isLocal(configFile)) {
     if (configFile !== userConfigFromActionPath(tempDir)) {
       // If the config file is not generated by the Action, it should be relative to the workspace.
@@ -863,19 +875,13 @@ export async function initConfig(
 ): Promise<Config> {
   const { logger, tempDir } = inputs;
 
-  let userConfig: UserConfig = {};
-  if (!inputs.configFile) {
-    logger.debug("No configuration file was provided");
-  } else {
-    logger.debug(`Using configuration file: ${inputs.configFile}`);
-    userConfig = await loadUserConfig(
-      inputs.configFile,
-      inputs.workspacePath,
-      inputs.apiDetails,
-      tempDir,
-    );
-  }
-
+  const userConfig = await loadUserConfig(
+    inputs.configFile,
+    inputs.workspacePath,
+    inputs.apiDetails,
+    tempDir,
+    logger,
+  );
   const config = await initActionState(inputs, userConfig, codeql);
 
   // If Code Quality analysis is the only enabled analysis kind, then we will initialise