如何从 BASH 中的节点脚本访问返回值?

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时间:2020-09-18 15:58:11  来源:igfitidea点击:

How to access a return value from a node script in BASH?

javascriptnode.jsbash

提问by Attilah

Let's say I have a bash script that calls a node script. I've tried to do it like this:

假设我有一个调用节点脚本的 bash 脚本。我试过这样做:

b.sh file:

b.sh 文件:

#!/bin/bash
v=$(node app.js)
echo "$v"

app.js file:

app.js 文件:

#!/usr/bin/env node
function f() {
   return "test";
}
return f();

How do I access the value returned by the node script ("test") from my bash script ?

如何从我的 bash 脚本访问节点脚本(“test”)返回的值?

回答by jm666

@Daniel Lizik gave an good answer (now deleted) for the part: how to output the value, e.g. using his answer:

@Daniel Lizik 给出了一个很好的答案(现已删除):如何输出值,例如使用他的答案:

#!/usr/bin/env node
function f() {
   return "test";
}
console.log(f())

And for the part how to capture the value in bash, do exactly as in your question:

对于如何在 bash 中捕获值的部分,请完全按照您的问题进行操作:

#!/bin/bash
val=$(node app.js)
echo "node returned: $val"

the above prints:

以上打印:

node returned: test