如何遍历所有ENV变量的打印键和值? [英] How to iterate through all the ENV variables printing key and value?

问题描述

我想遍历 env 打印中的变量:

I'd like to iterate through the variables in env printing:

name: ${name} value: ${value}

由于存在多行值，因此仅不能通过换行符进行拆分和迭代操作

Simply splitting by line break and iterating does not work, because of multi-line values, e.g.

SERVER_TLS_SERVER_CRT=-----BEGIN CERTIFICATE-----
foo
-----END CERTIFICATE-----

用例是要解决 Docker限制，该限制限制了通过传递多行变量--env-file.

The use case is to workaround Docker limitation that restricts passing multi-line variables via --env-file.

推荐答案

这是#bash的解决方案.

Here's the solution from #bash.

unset IFS
args=() i=0
for var in $(compgen -e); do
    printf -v 'args[i++]' -e%s=%s "$var" "${!var}"
done

我最初以为输出是想法，因此printf％q是必需的，但仅构建一个参数数组时并非如此，因此可以简化为:

I initially thought the idea was to output, hence printf %q was necessary, but that's not the case when just building an arguments array, so it can be simplified to this:

unset IFS
args=()
for var in $(compgen -e); do
    args+=( "-e$var=${!var}" )
done

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