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main.js
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/*
Main script for building and running the playground.
*/
import fs from "node:fs"
import fsp from "node:fs/promises"
import path from "node:path"
import url from "node:url"
import http from "node:http"
import process from "node:process"
import cp from "node:child_process"
import * as esb from "esbuild"
import {
DIST_DIRNAME, CONFIG_FILENAME, HTTP_PORT, PACKAGE_DIRNAME, PLAYGROUND_DIRNAME,
WASM_PATH, RELOAD_URL, CONFIG_OUT_FILENAME, WASM_FILENAME, PUBLIC_DIRNAME,
} from "./config.js"
const dirname = path.dirname(url.fileURLToPath(import.meta.url))
const playground_path = path.join(dirname, PLAYGROUND_DIRNAME)
const package_path = path.join(dirname, PACKAGE_DIRNAME)
const dist_path = path.join(dirname, DIST_DIRNAME)
const obj_path = path.join(dirname, "obj")
const config_path = path.join(dirname, CONFIG_FILENAME)
const config_path_out = path.join(playground_path, CONFIG_OUT_FILENAME)
const public_path = path.join(playground_path, PUBLIC_DIRNAME)
const shdc_dir_path = path.join(dirname, "shdc")
const shdc_bin_path = path.join(dirname, "shdc.bin")
/** @type {string[]} */
const ODIN_ARGS_VET = [
"-vet-unused",
"-vet-style",
"-vet-semicolon",
"-vet-cast",
"-vet-tabs",
]
/** @type {string[]} */
const ODIN_ARGS_SHARED = [
"odin",
"build",
playground_path,
"-out:"+WASM_PATH,
"-target:js_wasm32",
"-error-pos-style:unix",
]
/** @type {string[]} */
const ODIN_ARGS_DEV = [
"-debug",
"-use-separate-modules",
]
/** @type {string[]} */
const ODIN_ARGS_RELESE = [
...ODIN_ARGS_VET,
"-o:aggressive",
"-disable-assert",
"-no-bounds-check",
"-obfuscate-source-code-locations",
]
const ODIN_ARGS_SHDC = [
"odin",
"build",
shdc_dir_path,
"-out:"+shdc_bin_path,
...ODIN_ARGS_VET,
"-o:aggressive",
"-microarch:native",
"-disable-assert",
"-no-bounds-check",
"-obfuscate-source-code-locations",
"-error-pos-style:unix",
]
/*
Allow passing odin compiler flags to the script.
Example:
node main.js -odin:-debug
npm run dev -- -odin:-debug
*/
for (let i = 2; i < process.argv.length; i++) {
const arg = process.argv[i]
if (arg.startsWith("-odin:")) {
const flag = arg.substring(6)
ODIN_ARGS_SHARED.push(flag)
}
}
/** @enum {(typeof Command)[keyof typeof Command]} */
const Command = /** @type {const} */ ({
Server : "server", // Start a dev server
Preview : "preview", // Start a static server that serves the dist dir
Build : "build", // Build the example page
Build_SHDC: "build-shdc", // Rebuild the SHDC binary
shdc : "shdc", // Generate shader utils
})
/** @type {Record<Command, (args: string[]) => void>} */
const command_handlers = {
[Command.Server]() {
/* Make sure the dist dir exists */
void fs.mkdirSync(dist_path, {recursive: true})
const server = makeHttpServer(requestListener)
/** @type {Set<http.ServerResponse>} */
const reload_clients_set = new Set()
/** @type {Promise<number> | null} */ let build_wasm_promise = null
/** @type {Promise<number> | null} */ let build_shader_utils_promise = null
/** @type {Promise<number> | null} */ let build_shdc_promise = null
function build_shdc_start() {
return build_shdc_promise = (async () => {
let r = await build_shdc()
build_shdc_promise = null
return r
})()
}
function build_shader_utils_start() {
if (build_shader_utils_promise)
return build_shader_utils_promise
info("Building shader utils...")
return build_shader_utils_promise = (async () => {
await build_shdc_promise
let r = await build_shader_utils()
build_shader_utils_promise = null
return r
})()
}
function build_wasm_start() {
if (build_wasm_promise)
return build_wasm_promise
info("Building wasm...")
return build_wasm_promise = (async () => {
await build_shader_utils_promise
let r = await build_wasm(true)
build_wasm_promise = null
return r
})()
}
build_shdc_start()
build_shader_utils_start()
build_wasm_start()
const config_promise = build_config(true)
const watchers = [
fs.watch(playground_path, {recursive: true}),
fs.watch(package_path, {recursive: true}),
fs.watch(obj_path, {recursive: true}),
]
for (let watcher of watchers) {
watcher.on("change", (e, _filename) => {
let filename = String(_filename)
let basename = path.basename(filename)
if (!basename || basename[0] === "." || basename[0] === "_") return
let ext = path.extname(basename)
switch (ext) {
case ".odin":
build_wasm_start()
break
case ".vert":
case ".frag":
build_shader_utils_start()
break
case ".svg":
case ".html":
case ".css":
case ".obj":
case ".gif":
case ".js":
break
default:
return // ignore
}
info(`${filename} ${e}, reloading page...`)
for (const client of reload_clients_set) {
client.write(`data: reload\n\n`)
}
})
}
function exit() {
void server.close()
for (let w of watchers) w.close()
for (let c of reload_clients_set) c.end()
void process.exit(0)
}
void process.on("SIGINT", exit)
void process.on("SIGTERM", exit)
/** @returns {Promise<void>} */
async function requestListener(
/** @type {http.IncomingMessage} */ req,
/** @type {http.ServerResponse} */ res,
) {
const req_time = performance.now()
if (!req.url || req.method !== "GET") return end404(req, res, req_time)
switch (req.url) {
// Handle SSE endpoint
case RELOAD_URL: {
res.writeHead(200, {
"Content-Type": "text/event-stream",
"Cache-Control": "no-cache",
"Connection": "keep-alive",
})
res.write("\n")
reload_clients_set.add(res)
req.on("close", () => reload_clients_set.delete(res))
return
}
case "/" + CONFIG_OUT_FILENAME:
await config_promise
break
case "/" + WASM_FILENAME:
await build_wasm_promise
break
}
/* Static files */
const relative_filepath = toWebFilepath(req.url)
let filepath = path.join(public_path, relative_filepath)
let exists = await fileExists(filepath)
if (!exists) {
filepath = path.join(playground_path, relative_filepath)
exists = await fileExists(filepath)
}
if (!exists) {
filepath = path.join(dirname, relative_filepath)
exists = await fileExists(filepath)
}
if (!exists) return end404(req, res, req_time)
streamStatic(req, res, filepath, req_time)
}
},
[Command.Preview]() {
const server = makeHttpServer(requestListener)
/**
* @param {http.IncomingMessage} req
* @param {http.ServerResponse} res
* @returns {Promise<void>}
*/
async function requestListener(req, res) {
const req_time = performance.now()
// /* Simulate delay */
// await sleep(300)
if (!req.url || req.method !== "GET") return end404(req, res, req_time)
const relative_filepath = toWebFilepath(req.url)
const filepath = path.join(dist_path, relative_filepath)
const exists = await fileExists(filepath)
if (!exists) return end404(req, res, req_time)
streamStatic(req, res, filepath, req_time)
}
void process.on("SIGINT", () => {
void server.close()
void process.exit(0)
})
},
async [Command.Build]() {
const logger = make_logger("BUILD")
/* Clean dist dir */
await ensureEmptyDir(dist_path)
logger_info(logger, "Cleared dist dir")
/*
During build, building shdc, and generating shader utils is skipped
this is because they are comminted to the repo, and are not expected to change
*/
const wasm_promise = build_wasm(false)
await build_config(false)
logger_info(logger, "Built config")
const res = await esb.build({
entryPoints: [path.join(playground_path, "setup.js")],
outfile: path.join(dist_path, "setup.js"),
format: "esm",
bundle: true,
minify: true,
// splitting: true,
treeShaking: true,
})
if (res.errors.length > 0) {
let message = "JS Build failed, errors:"
for (const error of res.errors) {
message += "\n\t" + error.text
}
logger_error(logger, message)
} else {
logger_info(logger, "JS Build complete")
}
const wasm_exit_code = await wasm_promise
if (wasm_exit_code != 0) panic("Failed to build WASM, code: "+wasm_exit_code)
/* Copy public dir */
await copyDirContents(public_path, dist_path)
logger_success(logger, "Build complete")
process.exit(0)
},
[Command.Build_SHDC]() {
fs.rmSync(shdc_bin_path, {force: true})
build_shdc()
},
[Command.shdc]() {
build_shdc()
build_shader_utils()
},
}
/** @type {<O extends Object>(o: O, k: PropertyKey | keyof O) => k is keyof O} */
const hasKey = (o, k) => o.hasOwnProperty(k)
const args = process.argv.slice(2)
const command = args[0]
if (!command) panic("Command not specified")
if (!hasKey(command_handlers, command)) panic("Unknown command: "+command)
const command_handler = command_handlers[command]
command_handler(args.slice(1))
/**
@param {string[]} args
@param {(fs.ObjectEncodingOptions & cp.ExecFileOptions) | undefined | null} options
@returns {cp.ChildProcess} */
function exec(args, options) {
let process = cp.execFile(args[0], args.slice(1), options)
console.log("\x1b[90m"+"$ odin "+args.join(" ")+"\x1b[0m")
process.stderr?.on("data", console.error)
return process
}
/** @returns {Promise<number>} exit code */
async function build_shader_utils() {
const start = performance.now()
const child = exec([shdc_bin_path, ...args], {cwd: dirname})
const code = await childProcessToPromise(child)
if (code === 0) {
info(`Shader utils built in: ${Math.round(performance.now() - start)}ms`)
} else {
error("Shader utils build failed");
}
return code
}
/** @returns {Promise<number>} exit code */
async function build_shdc() {
const start = performance.now()
if (await fileExists(shdc_bin_path)) {
return 0
}
const child = exec(ODIN_ARGS_SHDC, {cwd: dirname})
const code = await childProcessToPromise(child)
if (code === 0) {
info(`SHDC built in: ${Math.round(performance.now() - start)}ms`)
} else {
error("SHDC build failed");
}
return code
}
/**
* @param {boolean} is_dev
* @returns {Promise<number>} exit code
*/
async function build_wasm(is_dev) {
const start = performance.now()
const child = exec(
ODIN_ARGS_SHARED.concat(is_dev ? ODIN_ARGS_DEV : ODIN_ARGS_RELESE),
{cwd: dirname},
)
const code = await childProcessToPromise(child)
if (code === 0) {
info(`WASM built in: ${Math.round(performance.now() - start)}ms`)
} else {
error("WASM build failed");
}
return code
}
/**
* Copy the config file to the playground source dir, with a correct env mode.
*
* @param {boolean} is_dev
* @returns {Promise<void>}
*/
async function build_config(is_dev) {
const content = await fsp.readFile(config_path, "utf8")
const corrected =
"/* THIS FILE IS AUTO GENERATED, DO NOT EDIT */\n" +
"export const IS_DEV = /** @type {boolean} */ (" +
is_dev +
")\n" +
shiftLines(content, 1)
await fsp.writeFile(config_path_out, corrected)
}
/**
* @param {http.RequestListener} requestListener
* @returns {http.Server}
*/
function makeHttpServer(requestListener) {
const server = http.createServer(requestListener).listen(HTTP_PORT)
// "\x1b[90m"+message+"\x1b[0m");
console.log("\x1b[90m"+`//`+"\x1b[0m")
console.log("\x1b[90m"+`//`+"\x1b[0m"+` Server running at http://127.0.0.1:${HTTP_PORT}`)
console.log("\x1b[90m"+`//`+"\x1b[0m")
return server
}
/**
* @param {http.IncomingMessage} req
* @param {http.ServerResponse} res
* @param {number} req_time
* @returns {void}
*/
function end404(req, res, req_time) {
void res.writeHead(404)
void res.end()
log_request(req, res, req_time)
<
1098F
div id="LC471" class="react-file-line html-div" data-testid="code-cell" data-line-number="471" style="position:relative">}
/**
* @param {http.IncomingMessage} req
* @param {http.ServerResponse} res
* @param {string} filepath
* @param {number} req_time
* @returns {void} */
function streamStatic(req, res, filepath, req_time) {
const ext = toExt(filepath)
const mime_type = mimeType(ext)
void res.writeHead(200, {"Content-Type": mime_type})
const stream = fs.createReadStream(filepath)
void stream.pipe(res)
log_request(req, res, req_time)
}
function info (/** @type {string} */ message) {
console.log("\x1b[90m"+message+"\x1b[0m");
}
function success (/** @type {string} */ message) {
console.log("\x1b[32m"+message+"\x1b[0m")
}
function error (/** @type {string} */ message) {
console.error("\x1b[31m"+message+"\x1b[0m")
}
/** @returns {never} */
function panic(/** @type {string} */ message) {
error(message)
process.exit(1)
}
/**
* @typedef {object} Logger
* @property {string} prefix
* @property {number} time
*/
/**
* @param {string} prefix
* @returns {Logger} */
function make_logger(/** @type {string} */ prefix) {
return {
prefix: prefix,
time : performance.now(),
}
}
/**
* @param {Logger} logger
* @param {string} message
* @returns {void} */
function logger_info(logger, message) {
const now = performance.now()
console.log("\x1b[90m"+`${logger.prefix} [${Math.round(now - logger.time)}ms] ${message}`+"\x1b[0m")
logger.time = now
}
/**
* @param {Logger} logger
* @param {string} message
* @returns {void} */
function logger_success(logger, message) {
const now = performance.now()
console.log("\x1b[32m"+`${logger.prefix} [${Math.round(now - logger.time)}ms] ${message}`+"\x1b[0m")
logger.time = now
}
/**
* @param {Logger} logger
* @param {string} message
* @returns {void} */
function logger_error(logger, message) {
const now = performance.now()
console.error("\x1b[31m"+`${logger.prefix} [${Math.round(now - logger.time)}ms] ${message}`+"\x1b[0m")
logger.time = now
}
/**
* @param {http.IncomingMessage} req
* @param {http.ServerResponse} res
* @param {number} req_time
* @returns {void} */
function log_request(req, res, req_time) {
let txt = req.method ?? "NULL"
txt += " "
txt += res.statusCode === 200
? "\x1b[32m" // green
: "\x1b[31m" // red
txt += res.statusCode
txt += "\x1b[0m"
txt += " "
const time = Math.round(performance.now() - req_time)
txt +=
time < 100 ? "\x1b[32m" // green
: time < 500 ? "\x1b[33m" // yellow
: "\x1b[31m" // red
txt += time
txt += "ms"
txt += "\x1b[0m"
txt += " "
txt += req.url ?? "NULL"
console.log(txt)
}
/** @returns {string} */
function mimeType(/** @type {string} */ ext) {
switch (ext) {
case "html": return "text/html; charset=UTF-8"
case "js":
case "mjs": return "application/javascript"
case "json": return "application/json"
case "wasm": return "application/wasm"
case "css": return "text/css"
case "png": return "image/png"
case "jpg": return "image/jpg"
case "gif": return "image/gif"
case "ico": return "image/x-icon"
case "svg": return "image/svg+xml"
default: return "application/octet-stream"
}
}
function trueFn() {
return true
}
function falseFn() {
return false
}
/**
* @template T
* @param {Promise<T>} promise
* @returns {Promise<T | Error>}
*/
function unsafePromiseToError(promise) {
return promise.then(
result => result,
error => error,
)
}
/** @returns {Promise<boolean>} */
function unsafePromiseToBool(/** @type {Promise<any>} */ promise) {
return promise.then(trueFn, falseFn)
}
/** @returns {Promise<number>} Exit code */
function childProcessToPromise(/** @type {cp.ChildProcess} */ child) {
return new Promise(resolve => {
void child.on("close", resolve)
})
}
/**
* @param {number} ms
* @returns {Promise<void>}
*/
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms))
}
/** @returns {string} */
function toWebFilepath(/** @type {string} */ path) {
return path.endsWith("/") ? path + "index.html" : path
}
/** @returns {Promise<boolean>} */
function fileExists(/** @type {string} */ filepath) {
return unsafePromiseToBool(fsp.access(filepath))
}
/**
* @param {fs.PathLike} dirpath
* @returns {Promise<void>}
*/
function ensureEmptyDir(dirpath) {
return fsp.rm(dirpath, {recursive: true, force: true}).then(() => fsp.mkdir(dirpath))
}
/**
* @param {string} src
* @param {string} dest
* @returns {Promise<void>}
*/
async function copyDirContents(src, dest) {
const files = await fsp.readdir(src)
const promises = files.map(async file => {
const srcFile = path.join(src, file)
const destFile = path.join(dest, file)
const stats = await fsp.stat(srcFile)
if (stats.isDirectory()) {
await copyDir(srcFile, destFile)
} else {
await fsp.copyFile(srcFile, destFile)
}
})
await Promise.all(promises)
}
/**
* @param {string} src
* @param {string} dest
* @returns {Promise<void>}
*/
function copyDir(src, dest) {
return fsp.mkdir(dest).then(() => copyDirContents(src, dest))
}
/** @returns {string} */
function toExt(/** @type {string} */ filepath) {
return path.extname(filepath).substring(1).toLowerCase()
}
/** @returns {string} */
function shiftLines(/** @type {string} */ str, /** @type {number} */ lines) {
while (lines > 0) {
str = str.substring(str.indexOf("\n") + 1)
lines--
}
return str
}