I want to read from .tfvars which is variables_file_2 and export each variable (key) and value of it as environmental variable in bash so I can access it in my script

grep "^[^#]" "${variables_file_2}" > manifest.tfvars

while read line;
do
    export "$(echo "${line}" | tr -d "\"")"
done < manifest.tfvars

Currently getting

export: `{={': not a valid identifier

as error.

sample of .tfvars is

region = "us-east-2"

CodePudding user response：

You might want to use something more robust:

LANG=C awk -v OFS='=' '
    $1 ~ /^[[:alpha:]_][[:alnum:]_]*$/ && $2 == "=" && match($0,/".*"/) {
        print $1, substr($0,RSTART 1,RLENGTH-2)
    }
' "${variables_file_2}" > manifest.tfvars

while IFS='=' read -r var value
do
    export "$var"="$value"
done < manifest.tfvars

^{note: the awk assumes that the = are always surrounded by at least a space character}

CodePudding user response：

The code

grep "^[^#]" "${variables_file_2}" > manifest.tfvars

Looks like you're trying to remove/delete lines starting with a #

and the tr seems like trying to delete the quotes around the assignment after the = sign.

Something like this might do it.

#!/usr/bin/env bash

while IFS= read -r line; do
  echo export -- "$line"
done < <(sed '/^#/d;s/ = /=/;s/"//g' "${variables_file_2}")

With the assumption that the input from "${variables_file_2}" is something like.

#
region = "us-east-2"
#

With

sed '/^#/d;s/ = /=/;s/"//g' "${variables_file_2}"

Or even like

sed '/^#/d;s/^\([^ ]*\) = "\([^"].*\)"/\1=\2/' "${variables_file_2}"

The output should be.

region=us-east-2

• Remove the echo if you're ok with the output.