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import { join } from "node:path"
import { existsSync, watch } from "node:fs"
import {
readFileSync,
writeFileSync,
ensureDirSync,
pathExistsSync,
readJSONSync,
} from "fs-extra"
const debounce = require("debounce-promise")
import {
compile,
jacdacDefaultSpecifications,
DevsDiagnostic,
DEVS_BYTECODE_FILE,
formatDiagnostics,
DEVS_DBG_FILE,
prettySize,
DebugInfo,
parseStackFrame,
} from "@devicescript/compiler"
import { BINDIR, CmdOptions, debug, error, log } from "./command"
import { devtools } from "./devtools"
import type { DevsModule } from "@devicescript/vm"
export function readDebugInfo() {
let dbg: DebugInfo
try {
dbg = readJSONSync(join(BINDIR, DEVS_DBG_FILE))
} catch {}
return dbg
}
let devsInst: DevsModule
export function devsFactory() {
// emscripten doesn't like multiple instances
if (devsInst) return Promise.resolve(devsInst)
const d = require("@devicescript/vm")
try {
require("websocket-polyfill")
// @ts-ignore
global.Blob = require("buffer").Blob
} catch {
log("can't load websocket-polyfill")
}
return (d() as Promise<DevsModule>).then(m => {
devsInst = m
const dbg = readDebugInfo()
if (dbg)
m.dmesg = (s: string) => {
console.debug(parseStackFrame(dbg, s).markedLine)
}
m.devsInit()
return m
})
}
export async function getHost(options: BuildOptions & CmdOptions) {
const inst = options.noVerify ? undefined : await devsFactory()
const outdir = options.outDir || BINDIR
ensureDirSync(outdir)
const devsHost = {
write: (fn: string, cont: string) => {
const p = join(outdir, fn)
if (options.verbose) debug(`write ${p}`)
writeFileSync(p, cont)
if (
fn.endsWith(".jasm") &&
typeof cont == "string" &&
cont.indexOf("???oops") >= 0
)
throw new Error("bad disassembly")
},
log: (msg: string) => {
if (options.verbose) log(msg)
},
error: (err: DevsDiagnostic) => {
error(formatDiagnostics([err]))
},
mainFileName: () => options.mainFileName || "main.ts",
getSpecs: () => jacdacDefaultSpecifications,
verifyBytecode: (buf: Uint8Array) => {
if (!inst) return
const res = inst.devsVerify(buf)
if (res != 0) throw new Error("verification error: " + res)
},
}
return devsHost
}
export class CompilationError extends Error {
constructor(message: string) {
super(message)
this.name = "CompilationError"
}
}
export async function compileFile(fn: string, options: BuildOptions = {}) {
if (!pathExistsSync(fn)) throw new Error(`source file ${fn} not found`)
return compileBuf(readFileSync(fn), { ...options, mainFileName: fn })
}
export async function compileBuf(buf: Buffer, options: BuildOptions = {}) {
const host = await getHost(options)
const res = compile(buf.toString("utf8"), {
host,
isLibrary: options.library,
})
return res
}
export interface BuildOptions {
noVerify?: boolean
library?: boolean
outDir?: string
watch?: boolean
stats?: boolean
// internal option
mainFileName?: string
}
export async function build(file: string, options: BuildOptions & CmdOptions) {
file = file || "main.ts"
options = options || {}
options.outDir = options.outDir || BINDIR
options.mainFileName = file
if (!existsSync(file)) {
// otherwise we throw
error(`${file} does not exist`)
return
}
log(`building ${file}`)
ensureDirSync(options.outDir)
await buildOnce(file, options)
if (options.watch) await buildWatch(file, options)
}
async function buildWatch(file: string, options: BuildOptions) {
const bytecodeFile = join(options.outDir, DEVS_BYTECODE_FILE)
const debugFile = join(options.outDir, DEVS_DBG_FILE)
// start watch source file
log(`watching ${file}...`)
const work = debounce(
async () => {
debug(`change detected...`)
await buildOnce(file, options)
},
500,
{ leading: true }
)
watch(file, work)
// start watching bytecode file
await devtools({ ...options, bytecodeFile, debugFile })
}
async function buildOnce(file: string, options: BuildOptions & CmdOptions) {
const { watch, stats } = options
const { success, binary, dbg } = await compileFile(file, options)
if (!success) {
if (watch) return
throw new CompilationError("compilation failed")
}
log(`bytecode: ${prettySize(binary.length)}`)
if (stats) {
const { sizes, functions } = dbg
log(
" " +
Object.keys(sizes)
.map(name => `${name}: ${prettySize(sizes[name])}`)
.join(", ")
)
log(` functions:`)
functions
.sort((l, r) => l.size - r.size)
.forEach(fn => {
log(` ${fn.name} (${prettySize(fn.size)})`)
fn.users.forEach(user =>
debug(` <-- ${user.file}: ${user.line}, ${user.col}`)
)
})
}
}