feat: use Vite 6 for old Vitest (#389)

Author: sapphi-red

tests/waku.ts

@@ -9,5 +9,13 @@ export async function test(options: RunOptions) {
 		build: 'compile',
 		beforeTest: 'pnpm playwright install chromium',
 		test: 'test-vite-ecosystem-ci',
+		overrides: {
+			// It uses Vitest 3.2+ so we don't need to inject the overrides.
+			// If we inject overrides, the following error happens due to how waku sets overrides for the test.
+			//
+			// npm error code EINVALIDTAGNAME
+			// npm error Invalid tag name "<3.2.0>vite" of package "vitest@<3.2.0>vite": Tags may not have any characters that encodeURIComponent encodes.
+			vitest: false,
+		},
 	})
 }

utils.ts

@@ -286,7 +286,11 @@ export async function runInRepo(options: RunOptions & RepoOptions) {
 			overrides.vite = options.release
 		}
 
-		if (overrides.rollup !== false || overrides.esbuild === true) {
+		if (
+			overrides.rollup !== false ||
+			overrides.esbuild === true ||
+			overrides.vitest !== false
+		) {
 			const viteManifest = await pacote.manifest(`vite@${options.release}`, {
 				retry: {
 					// enable retry with same options with pnpm (https://pnpm.io/settings#fetchretries)
@@ -306,6 +310,11 @@ export async function runInRepo(options: RunOptions & RepoOptions) {
 			if (overrides.esbuild === true) {
 				overrides.esbuild = viteManifest.dependencies!.esbuild
 			}
+
+			// skip if `overrides.vitest` is `false`
+			if (overrides.vitest !== false && agent === 'pnpm') {
+				overrides['vitest@<3.2.0>vite'] = '^6.3.5'
+			}
 		}
 	} else {
 		overrides.vite ||= `${options.vitePath}/packages/vite`
@@ -330,6 +339,11 @@ export async function runInRepo(options: RunOptions & RepoOptions) {
 			overrides.esbuild = vitePackageInfo.dependencies.esbuild.version
 		}
 
+		// skip if `overrides.vitest` is `false`
+		if (overrides.vitest !== false && agent === 'pnpm') {
+			overrides['vitest@<3.2.0>vite'] = '^6.3.5'
+		}
+
 		// build and apply local overrides
 		const localOverrides = await buildOverrides(pkg, options, overrides)
 		cd(dir) // buildOverrides changed dir, change it back