[SOLVED] Reading command line flags from file

Issue

I am writing a script that allows users to provide additional docker build args using a config file.

BUILD_ARGS=
source ./userconfig.sh
docker build $BUILD_ARGS ...

In userconfig.sh,

USERID=$(id -u)
BUILD_ARGS="--build-arg=\"USERID=$USERID\" --build-arg\"SECONDARG=somethingelse\""

I see that the args are being single quoted when executed

docker build '--build-arg="USERID=1000"' '--build-arg="SECONDARG=somethingelse"' ...

I have tried using arrays instead of string.

BUILD_ARGS=()
BUILD_ARGS=( --build-arg=\"USERID=$USERID\" --build-arg\"SECONDARG=somethingelse\" )
docker build "${BUILD_ARGS[@]}" ...

I get the same error.

How can i fix this?

Solution

Use an array. Do not escape specially in an array, use it normally like you would on command line.

BUILD_ARGS=( --build-arg="USERID=$USERID" --build-arg"SECONDARG=somethingelse" )
docker build "${BUILD_ARGS[@]}" ...

Answered By - KamilCuk

Answer Checked By - Candace Johnson (WPSolving Volunteer)