// 創(chuàng)建子進(jìn)程
const p = Deno.run({
cmd: ["echo", "hello"],
});
// 等待完成
await p.status();
$ deno run --allow-run ./subprocess_simple.ts
hello
window.onload 被賦值為一個(gè)函數(shù),它將會(huì)在主腳本加載后被調(diào)用,和瀏覽器的 onload 一樣,可以用于主入口點(diǎn)。 默認(rèn)情況下,當(dāng)您調(diào)用 Deno.run() 時(shí),子進(jìn)程將繼承父進(jìn)程的標(biāo)準(zhǔn)流。如果您想要和子進(jìn)程通信,可以使用 "piped" 選項(xiàng)。
const fileNames = Deno.args;
const p = Deno.run({
cmd: [
"deno",
"run",
"--allow-read",
"https://deno.land/std/examples/cat.ts",
...fileNames,
],
stdout: "piped",
stderr: "piped",
});
const { code } = await p.status();
if (code === 0) {
const rawOutput = await p.output();
await Deno.stdout.write(rawOutput);
} else {
const rawError = await p.stderrOutput();
const errorString = new TextDecoder().decode(rawError);
console.log(errorString);
}
Deno.exit(code);
$ deno run --allow-run ./subprocess.ts <somefile>
[file content]
$ deno run --allow-run ./subprocess.ts non_existent_file.md
Uncaught NotFound: No such file or directory (os error 2)
at DenoError (deno/js/errors.ts:22:5)
at maybeError (deno/js/errors.ts:41:12)
at handleAsyncMsgFromRust (deno/js/dispatch.ts:27:17)
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