[SOLVED] How to iterate through all the ENV variables printing key and value?

Issue

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

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

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-----

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

Solution

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

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

Answered By - geirha