feat: normalize tsconfigPath in environment configuration (#5263)

Author: chenjiahan

packages/core/src/createContext.ts

@@ -98,10 +98,7 @@ export async function updateEnvironmentContext(
   context.environments ||= {};
 
   for (const [index, [name, config]] of Object.entries(configs).entries()) {
-    const tsconfigPath = config.source.tsconfigPath
-      ? getAbsolutePath(context.rootPath, config.source.tsconfigPath)
-      : undefined;
-
+    const { tsconfigPath } = config.source;
     const browserslist = await getBrowserslistByEnvironment(
       context.rootPath,
       config,

packages/core/src/provider/initConfigs.ts

@@ -4,7 +4,7 @@ import {
   updateContextByNormalizedConfig,
   updateEnvironmentContext,
 } from '../createContext';
-import { camelCase, color, pick } from '../helpers';
+import { camelCase, color, getAbsolutePath, pick } from '../helpers';
 import { isDebug, logger } from '../logger';
 import { mergeRsbuildConfig } from '../mergeConfig';
 import { initPlugins } from '../pluginManager';
@@ -160,6 +160,15 @@ const validateRsbuildConfig = (config: NormalizedConfig) => {
   }
 };
 
+/**
+ * Initialize the Rsbuild config
+ * 1. Initialize the Rsbuild plugins
+ * 2. Run all the `modifyRsbuildConfig` hooks
+ * 3. Normalize the Rsbuild config, merge with the default config
+ * 4. Initialize the configs for each environment
+ * 5. Run all the `modifyEnvironmentConfig` hooks
+ * 6. Validate the final Rsbuild config
+ */
 export async function initRsbuildConfig({
   context,
   pluginManager,
@@ -207,14 +216,26 @@ export async function initRsbuildConfig({
       name,
     );
 
-    environments[name] = {
+    const normalizedEnvironmentConfig = {
       ...environmentConfig,
       dev: {
         ...environmentConfig.dev,
         ...rsbuildSharedDev,
       },
       server,
     };
+
+    const { tsconfigPath } = normalizedEnvironmentConfig.source;
+
+    // Ensure the `tsconfigPath` is an absolute path
+    if (tsconfigPath) {
+      normalizedEnvironmentConfig.source.tsconfigPath = getAbsolutePath(
+        context.rootPath,
+        tsconfigPath,
+      );
+    }
+
+    environments[name] = normalizedEnvironmentConfig;
   }
 
   context.normalizedConfig = {