123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150
import { dirname, fromFileUrl, gte, join, toFileUrl, walk } from "./deps.ts";import { error } from "./error.ts";
const MIN_DENO_VERSION = "1.25.0";
export function ensureMinDenoVersion() {  // Check that the minimum supported Deno version is being used.  if (!gte(Deno.version.deno, MIN_DENO_VERSION)) {    let message =      `Deno version ${MIN_DENO_VERSION} or higher is required. Please update Deno.\n\n`;
    if (Deno.execPath().includes("homebrew")) {      message +=        "You seem to have installed Deno via homebrew. To update, run: `brew upgrade deno`\n";    } else {      message += "To update, run: `deno upgrade`\n";    }
    error(message);  }}
async function collectDir(dir: string): Promise<string[]> {  const dirUrl = toFileUrl(dir);  const paths = [];  const routesFolder = walk(dir, {    includeDirs: false,    includeFiles: true,    exts: ["tsx", "jsx", "ts", "js"],  });  for await (const entry of routesFolder) {    const path = toFileUrl(entry.path).href.substring(      dirUrl.href.length,    );    paths.push(path);  }  paths.sort();  return paths;}
interface Manifest {  routes: string[];  islands: string[];}
export async function collect(directory: string): Promise<Manifest> {  const [routes, islands] = await Promise.all([    collectDir(join(directory, "./routes")),    collectDir(join(directory, "./islands")),  ]);
  return { routes, islands };}
export async function generate(directory: string, manifest: Manifest) {  const { routes, islands } = manifest;
  const output = `// DO NOT EDIT. This file is generated by fresh.// This file SHOULD be checked into source version control.// This file is automatically updated during development when running \`dev.ts\`.
${    routes.map((file, i) => `import * as $${i} from "./routes${file}";`).join(      "\n",    )  }${    islands.map((file, i) => `import * as $$${i} from "./islands${file}";`)      .join("\n")  }
const manifest = {  routes: {    ${    routes.map((file, i) => `${JSON.stringify(`./routes${file}`)}: $${i},`)      .join("\n    ")  }  },  islands: {    ${    islands.map((file, i) => `${JSON.stringify(`./islands${file}`)}: $$${i},`)      .join("\n    ")  }  },  baseUrl: import.meta.url,};
export default manifest;`;
  const proc = new Deno.Command(Deno.execPath(), {    args: ["fmt", "-"],    stdin: "piped",    stdout: "piped",    stderr: "null",  }).spawn();
  const raw = new ReadableStream({    start(controller) {      controller.enqueue(new TextEncoder().encode(output));      controller.close();    },  });  await raw.pipeTo(proc.stdin);  const { stdout } = await proc.output();
  const manifestStr = new TextDecoder().decode(stdout);  const manifestPath = join(directory, "./fresh.gen.ts");
  await Deno.writeTextFile(manifestPath, manifestStr);  console.log(    `%cThe manifest has been generated for ${routes.length} routes and ${islands.length} islands.`,    "color: blue; font-weight: bold",  );}
export async function dev(base: string, entrypoint: string) {  ensureMinDenoVersion();
  entrypoint = new URL(entrypoint, base).href;
  const dir = dirname(fromFileUrl(base));
  let currentManifest: Manifest;  const prevManifest = Deno.env.get("FRSH_DEV_PREVIOUS_MANIFEST");  if (prevManifest) {    currentManifest = JSON.parse(prevManifest);  } else {    currentManifest = { islands: [], routes: [] };  }  const newManifest = await collect(dir);  Deno.env.set("FRSH_DEV_PREVIOUS_MANIFEST", JSON.stringify(newManifest));
  const manifestChanged =    !arraysEqual(newManifest.routes, currentManifest.routes) ||    !arraysEqual(newManifest.islands, currentManifest.islands);
  if (manifestChanged) await generate(dir, newManifest);
  await import(entrypoint);}
function arraysEqual<T>(a: T[], b: T[]): boolean {  if (a.length !== b.length) return false;  for (let i = 0; i < a.length; ++i) {    if (a[i] !== b[i]) return false;  }  return true;}