DateKeys-App/vite.config.ts

// Vite configuration of the SvelteKit site. The library tests run with
// vitest.config.ts, which vitest prefers when both files exist.
import { sveltekit } from '@sveltejs/kit/vite';
import { mkdirSync, writeFileSync } from 'node:fs';
import { join } from 'node:path';
import { defineConfig, type Plugin } from 'vite';

// Records what the client bundle is made of, for scripts/check-build.mjs:
// each chunk with the chunks it imports and the modules it contains, with
// their rendered sizes. The record goes to .svelte-kit/output, outside the
// site.
function clientModules(): Plugin {
  let root = process.cwd();
  return {
    name: 'datekeys:client-modules',
    apply: 'build',
    configResolved(config) {
      root = config.root;
    },
    generateBundle(_, bundle) {
      if (this.environment.name !== 'client') return;
      const chunks: Record<string, { imports: string[]; dynamicImports: string[]; modules: Record<string, number> }> = {};
      for (const out of Object.values(bundle)) {
        if (out.type !== 'chunk') continue;
        chunks[out.fileName] = {
          imports: out.imports,
          dynamicImports: out.dynamicImports,
          modules: Object.fromEntries(Object.entries(out.modules).map(([id, m]) => [id.replace(/\\/g, '/'), m.renderedLength])),
        };
      }
      const dir = join(root, '.svelte-kit', 'output');
      mkdirSync(dir, { recursive: true });
      writeFileSync(join(dir, 'client-modules.json'), JSON.stringify({ chunks }, null, 1));
    },
  };
}

export default defineConfig({
  plugins: [sveltekit(), clientModules()],
  build: {
    // Never inline an asset as a data: URL. The CSP allows only the page's
    // own origin, so the official fixtures (src/lib/inspector/fixtures.ts)
    // must be separate same-origin files, whatever their size.
    assetsInlineLimit: 0,
  },
  server: {
    fs: {
      // The dev server serves the official fixtures straight from testdata/,
      // the single source of truth; the build copies them as hashed assets.
      allow: ['testdata/fixtures'],
    },
  },
});