vite.config.mjs

import path from "node:path";

import { svelte } from "@sveltejs/vite-plugin-svelte";
import { defineConfig } from "vite";
import tsconfigPaths from "vite-tsconfig-paths";

const rootDirPath = process.cwd();

const outDirPath = path.resolve(rootDirPath, "out", "build");

/**
 * @returns {import("vitest").UserConfig}
 * @see https://vitejs.dev/config/
 */
export default defineConfig(
  ({ command, mode }) =>
    /** @type {*} */ ({
      define: {
        __ENV__: JSON.stringify(
          command === "build" ? "production" : "development",
        ),
        __USE_LOCAL_API__: JSON.stringify(mode === "mocked"),
        __LOCAL_API_PORT__: JSON.stringify(9009),
      },
      build: {
        outDir: outDirPath,
        assetsDir: "",
        emptyOutDir: true,
        minify: command === "build",
      },
      plugins: [
        svelte({
          configFile: path.resolve(rootDirPath, "svelte.config.mjs"),
          hot: false,
        }),
        tsconfigPaths({ root: rootDirPath }),
      ],
      test: {
        globals: true,
        environment: "jsdom",
        setupFiles: path.resolve(rootDirPath, "vitest.setup.ts"),
        globalSetup: path.resolve(rootDirPath, "vitest.global.mjs"),
        cache: {
          dir: path.resolve(rootDirPath, "node_modules", ".vitest"),
        },
        coverage: {
          provider: "istanbul",
          reporter: ["lcov"],
          reportsDirectory: path.resolve(rootDirPath, "out", "coverage"),
          include: ["src/**"],
          exclude: [
            "**/__fakes__/**",
            "**/__mocks__/**",
            "**/__tests__/**",
            "**/__e2e__/**",
            "**/*.json",
            "**/*.js",
          ],
          // Include _all_ files in coverage, even untested ones:
          all: true,
          // Clean coverage results before running tests:
          clean: true,
        },
      },
    }),
);