import { defineConfig } from 'vite';

// Builds two CSS entries with no plugin in the graph, isolating Vite's own bundled postcss-import,
// whose `skipDuplicates` option is the deduplication StylesheetsBundleTest.php pins:
// resources/css/all.css, and tests/Fixtures/dedup-app.css, an application-shaped entry importing
// per-component stylesheets that share button.css. A stylesheet several files import lands once
// per entry, at its first position.
//
// Not the Workbench's config: this one carries no plugin, which is what isolates Vite's own
// postcss-import above. The Workbench's config carries laravel-vite-plugin, so its build is not
// this dedup test's to run.
//
// DEDUP_OUT_DIR is required: the test builds into a temporary directory and deletes it, and nothing
// should land in the package's own tree, least of all workbench/public/build.
if (!process.env.DEDUP_OUT_DIR) {
    throw new Error('Set DEDUP_OUT_DIR to the directory the dedup fixture should build into.');
}

export default defineConfig({
    publicDir: false,
    build: {
        outDir: process.env.DEDUP_OUT_DIR,
        emptyOutDir: true,
        manifest: true,
        rollupOptions: {
            input: ['resources/css/all.css', 'tests/Fixtures/dedup-app.css'],
        },
    },
    logLevel: 'silent',
});