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dev.ts
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dev.ts
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import { basename, extname, relative, resolve } from "https://deno.land/std@0.136.0/path/mod.ts";
import mitt, { Emitter } from "https://esm.sh/mitt@3.0.0";
import { parseDeps } from "https://deno.land/x/aleph_compiler@0.5.4/mod.ts";
import { findFile, watchFs } from "../lib/fs.ts";
import log, { blue } from "../lib/log.ts";
import util from "../lib/util.ts";
import { serve as httpServe } from "../lib/serve.ts";
import { builtinModuleExts, initModuleLoaders, loadImportMap } from "../server/helpers.ts";
import { serve } from "../server/mod.ts";
import { initRoutes, toRouteRegExp } from "../server/routing.ts";
import { generate } from "../server/generate.ts";
import type { DependencyGraph } from "../server/graph.ts";
import { proxyModules } from "../server/proxy_modules.ts";
import type { AlephConfig } from "../server/types.ts";
type FsEvents = {
[key in "create" | "remove" | "transform" | `modify:${string}` | `hotUpdate:${string}`]: {
specifier: string;
status?: "success" | "failure";
sourceCode?: string;
error?: {
message: string;
location?: [number, number];
};
};
};
const emitters = new Set<Emitter<FsEvents>>();
const createEmitter = () => {
const e = mitt<FsEvents>();
emitters.add(e);
return e;
};
const removeEmitter = (e: Emitter<FsEvents>) => {
e.all.clear();
emitters.delete(e);
};
const handleHMRSocket = (req: Request): Response => {
const { socket, response } = Deno.upgradeWebSocket(req, {});
const emitter = createEmitter();
const send = (message: Record<string, unknown>) => {
try {
socket.send(JSON.stringify(message));
} catch (err) {
log.warn("socket.send:", err.message);
}
};
socket.addEventListener("open", () => {
emitter.on("create", ({ specifier }) => {
const config: AlephConfig | undefined = Reflect.get(globalThis, "__ALEPH_CONFIG");
if (config && config.routes) {
const reg = toRouteRegExp(config.routes);
const routePattern = reg.exec(specifier);
if (routePattern) {
send({ type: "create", specifier, routePattern });
return;
}
}
send({ type: "create", specifier });
});
emitter.on("remove", ({ specifier }) => {
emitter.off(`hotUpdate:${specifier}`);
send({ type: "remove", specifier });
});
emitter.on("transform", ({ specifier, sourceCode, status, error }) => {
send({ type: "transform", specifier, sourceCode, status, error });
});
});
socket.addEventListener("message", (e) => {
if (util.isFilledString(e.data)) {
try {
const { type, specifier } = JSON.parse(e.data);
if (type === "hotAccept" && util.isFilledString(specifier)) {
emitter.on(
`hotUpdate:${specifier}`,
() => send({ type: "modify", specifier }),
);
}
} catch (_e) {
log.error("invlid socket message:", e.data);
}
}
});
socket.addEventListener("close", () => {
removeEmitter(emitter);
});
return response;
};
if (import.meta.main) {
// add envs
Deno.env.set("ALEPH_CLI", "true");
Deno.env.set("ALEPH_ENV", "development");
// set log level to 'debug' when in aleph framework dev mode
if (Deno.env.get("ALEPH_DEV")) {
log.setLevel("debug");
}
// serve app modules
const cwd = Deno.cwd();
const importMap = await loadImportMap();
const moduleLoaders = await initModuleLoaders(importMap);
await proxyModules(6060, { importMap, moduleLoaders });
log.info(`Watching files for changes...`);
watchFs(cwd, async (kind, path) => {
const specifier = "./" + relative(cwd, path);
const clientDependencyGraph: DependencyGraph | undefined = Reflect.get(globalThis, "clientDependencyGraph");
const serverDependencyGraph: DependencyGraph | undefined = Reflect.get(globalThis, "serverDependencyGraph");
if (kind === "remove") {
clientDependencyGraph?.unmark(specifier);
serverDependencyGraph?.unmark(specifier);
} else {
clientDependencyGraph?.update(specifier);
serverDependencyGraph?.update(specifier);
}
if (specifier === "./index.html") {
Reflect.deleteProperty(globalThis, "__ALEPH_INDEX_HTML");
}
if (builtinModuleExts.includes(extname(path).slice(1))) {
const code = await Deno.readTextFile(specifier);
try {
await parseDeps(specifier, code);
emitters.forEach((e) => {
e.emit("transform", {
specifier,
status: "success",
});
});
} catch (error) {
emitters.forEach((e) => {
e.emit("transform", {
specifier,
sourceCode: code,
status: "failure",
error: {
message: error.message,
location: error.message.split(`${specifier}:`)[1]?.split("\n")[0]?.split(":").map((s: string) =>
parseInt(s)
),
},
});
});
}
}
if (kind === "modify") {
emitters.forEach((e) => {
e.emit(`modify:${specifier}`, { specifier });
if (e.all.has(`hotUpdate:${specifier}`)) {
e.emit(`hotUpdate:${specifier}`, { specifier });
} else if (specifier !== "./routes.gen.ts") {
clientDependencyGraph?.lookup(specifier, (specifier) => {
if (e.all.has(`hotUpdate:${specifier}`)) {
e.emit(`hotUpdate:${specifier}`, { specifier });
return false;
}
});
serverDependencyGraph?.lookup(specifier, (specifier) => {
if (e.all.has(`hotUpdate:${specifier}`)) {
e.emit(`hotUpdate:${specifier}`, { specifier });
return false;
}
});
}
});
}
});
const emitter = createEmitter();
const [denoConfigFile, importMapFile, serverEntry, buildScript] = await Promise.all([
findFile(["deno.jsonc", "deno.json", "tsconfig.json"]),
findFile(["import_map", "import-map", "importmap", "importMap"].map((v) => `${v}.json`)),
findFile(builtinModuleExts.map((ext) => `server.${ext}`)),
findFile(builtinModuleExts.map((ext) => `build.${ext}`)),
]);
if (buildScript) {
log.info(`Running ${blue(basename(buildScript))}...`);
const { default: build } = await import(`file://${resolve(buildScript)}`);
await build();
}
let ac: AbortController | null = null;
const bs = async () => {
if (Deno.env.get("PREVENT_SERVER_RESTART") === "true") {
return;
}
if (ac) {
ac.abort();
log.info(`Restart server...`);
}
ac = new AbortController();
await bootstrap(ac.signal, serverEntry);
};
// update routes when fs change
const updateRoutes = async ({ specifier }: { specifier?: string }) => {
const config: AlephConfig | undefined = Reflect.get(globalThis, "__ALEPH_CONFIG");
const rc = config?.routes;
if (rc) {
const reg = toRouteRegExp(rc);
if (!specifier || reg.test(specifier)) {
if (specifier) {
Reflect.deleteProperty(globalThis, "__ALEPH_ROUTES");
}
const { routes } = await initRoutes(reg);
if (reg.generate) {
await generate(routes);
log.debug(`${routes.length} routes generate`);
}
}
}
};
emitter.on("create", updateRoutes);
emitter.on("remove", updateRoutes);
updateRoutes({});
if (serverEntry) {
emitter.on(`hotUpdate:./${basename(serverEntry)}`, bs);
if (denoConfigFile) {
emitter.on(`modify:./${basename(denoConfigFile)}`, bs);
}
if (importMapFile) {
emitter.on(`modify:./${basename(importMapFile)}`, async () => {
// update import maps for `proxyModules`
Object.assign(importMap, await loadImportMap());
bs();
});
}
}
await bs();
}
async function bootstrap(signal: AbortSignal, entry: string | undefined, fixedPort?: number): Promise<void> {
// clean globally cached objects
Reflect.deleteProperty(globalThis, "__ALEPH_SERVER");
Reflect.deleteProperty(globalThis, "__ALEPH_INDEX_HTML");
Reflect.deleteProperty(globalThis, "__UNO_GENERATOR");
if (entry) {
const entryName = basename(entry);
await import(
`http://localhost:${Deno.env.get("ALEPH_MODULES_PROXY_PORT")}/${entryName}?t=${Date.now().toString(16)}`
);
if (Deno.env.get("ALEPH_SERVER_ENTRY") !== entryName) {
Deno.env.set("ALEPH_SERVER_ENTRY", entryName);
log.info(`Bootstrap server from ${blue(entryName)}...`);
}
}
// make the default handler
if (!Reflect.has(globalThis, "__ALEPH_SERVER")) {
console.warn("No server entry found");
serve();
}
const { devServer }: AlephConfig = Reflect.get(globalThis, "__ALEPH_CONFIG") || {};
const { port: userPort, hostname, certFile, keyFile, handler } = Reflect.get(globalThis, "__ALEPH_SERVER") || {};
const port = fixedPort || userPort || 8080;
if (typeof devServer?.watchFS === "function") {
const { watchFS } = devServer;
const e = createEmitter();
signal.addEventListener("abort", () => {
removeEmitter(e);
});
e.on("*", (kind, { specifier }) => {
if (kind.startsWith("modify:")) {
watchFS("modify", specifier);
} else if (kind === "create" || kind === "remove") {
watchFS(kind, specifier);
}
});
}
try {
await httpServe({
port,
hostname,
certFile,
keyFile,
signal,
onListenSuccess: (port) => log.info(`Server ready on http://localhost:${port}`),
handler: (req: Request) => {
const { pathname } = new URL(req.url);
// handle HMR sockets
if (pathname === "/-/hmr") {
return handleHMRSocket(req);
}
return handler?.(req);
},
});
} catch (error) {
if (error instanceof Deno.errors.AddrInUse) {
log.warn(`Port ${port} is in use, try ${port + 1}...`);
await bootstrap(signal, entry, port + 1);
} else {
throw error;
}
}
}