Strip comments and single quotes from dotenv files

strip-env.sh

#!/usr/bin/env bash

# SOME_VALUE='my_value'
# SOME_VALUE=my_value
# SOME_ARRAY='["one", "two", "three"]'
# SOME_ARRAY='["one","two","three"]'
# SOME_ARRAY=["one", "two", "three"]

input="${1}"

# Safeguard from overwriting a source file by making sure filename ends in `.raw`.
if [[ ! "${input}" =~ \.raw$ ]]; then
    >&2 echo "source file does not have a '.raw' extension!" && exit 1
fi

if [[ ! -r "${input}" ]]; then
    >&2 echo "source file does not look to a regular file!" && exit 1
fi

key="(\w+)"
pattern1="([^']+)"

gsed -rn -e "s/^$key=['\"]?$pattern1['\"]?$/\1=\2/p" "${input}"