process-utils

import r from "process-utils"

async function main(){
    const { code, stdout, stderr } = await r("echo hi")
    if (code === 0) console.log(stdout)

    r$("echo hi")
    r$.ctx.code = 0
    console.log(ctx.pid, ctx.status)
    
    const p = await ra("echo hi")
    r("echo hi")

    await npm.install.save_dev("fs-extra", "numpy")
    
    npm.install.save_dev$("fs-extra", "numpy")

    r$("apt install ")

    r$("apt install vim emacs -y")
    r$("brew install markdown")
    r$("yum install vim -y")

    const { error, pid, status, code, signal } = await npm.install.save("fs-extra")
    const { error, pid. status, code, signal } = npm.install.save$("fs-extra")
    const npm_res = await npm.install("fs-extra")

    npm.install.save$("fs-extra").pipe( awk.check$("") )

    const p1 = await npm.install.save$("fs-extra").throwError()
    npm.install.save("fs-extra")

    console.log(npm_res.pid, npm_res.status)

    apt.install.yes$("vim")
    console.log(ctx.pid, ctx.status)

    await apt.install("vim")
    console.log("visualized")

    apt.install_("vim")
    apt.install("vim").toString_() // promise design

    apt.install("vim") // promise design

}

关于result的设计，我们默认需要用户写防御式代码

const result = processinstance.get()
"code" in result && console.log(result.code)
if ("code" in result) {
    console.log(result.code, result.signal)
}

另外一种写法是，用户很确定这里不会有问题，否则程序会以ERROR方式中断

const result = processinstance.getOrThrow() // no Error
console.log(result.code, result.signal)