运行子进程
示例:
// 创建子进程
const p = Deno.run({
cmd: ["echo", "hello"],
});
// 等待完成
await p.status();
运行
$ deno run --allow-run ./subprocess_simple.ts
hello
window.onload
被赋值为一个函数,它将会在主脚本加载后被调用,和浏览器的 onload 一样,可以用于主入口点。
默认情况下,当您调用 Deno.run()
时,子进程将继承父进程的标准流。如果您想要和子进程通信,可以使用 "piped"
选项。
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);
运行
$ 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)