[SOLVED] bash fails in providing environment variables from file to Qt sdktool

bash fails in providing environment variables from file to Qt sdktool

Qt provides sdktool for creating kits. I'm using it to automaticaly setup kit for cross-compilation.
Normally I should call source environment_file_from_sdk and then start Qt Creator in the same terminal.
I've adapted configure-qtcreator.sh for my needs. However at last step (addKit) I would like to provide all exports from environment_file_from_sdk as --env var.
So

ENV_VALUES=$(grep "export " $SDK_PATH/../environment-setup-cortexa53-crypto-veld-linux | tr -d '"' | sed -e 's/export //;s/^\(.*\)/--env "\1"/')

When I print this variable through echo - it look ok. Set of --env "<var>=<long_or_multiple_values>".
When I add it to sdktool addKit command

sdktool addKit
....
--cmake-config QT_QMAKE_EXECUTABLE:FILEPATH=$SDK_PATH/x86_64-pokysdk-linux/usr/bin/qmake \
$ENV_VALUES

It fails due to Argument parsing failed. Bash set -x command print shows that plenty of --env <var>=<value> has been surrounded by single quotation marks and look like --env '"ARCH=arm64"' --env '"CROSS_COMPILE=aarch64-veld-linux-"' --env '"OECORE_TUNE_CCARGS=-mcpu=cortex-a53' -march=armv8-a+crc+crypto '-mbranch-protection=standard"'.
How to solve it?

Solution

You have variables where the value contains spaces, so you have to do this a different way (see https://mywiki.wooledge.org/BashFAQ/050) -- you need to use an array:

# initialize an empty array
env_vars=()

# read the sed output
while IFS= read -r env_var; do
    # add this variable as an env option
    env_vars+=( --env "$env_var" )
done < <(
    sed 's/^export //p' "$env_file"
) 

sdktool addKit ... "${env_vars[@]}"

All the quotes are absolutely required. The < <(...) part is not a typo -- that is redirecting the process substitution into the while-read loop.

sed is not really required: bash can do it

env_vars=()

while IFS= read -r line; do
    if [[ "$line" =~ "export "(.*) ]]; then
        env_vars+=( --env "${BASH_REMATCH[1]//\"/}" )
    fi
done < "$env_file"