Fixed error messages

runner_scripts/root/cleanup.sh

@@ -25,8 +25,8 @@ function error {
 
 ## User authentication
 
-[ -z "$CUSTOM_ENV_AUTH_USER" ] && error "AUTH_USER CI/CD variable has not been set."
-[ -z "$CUSTOM_ENV_AUTH_KEY" ] && error "AUTH_KEY secret CI/CD variable has not been set."
+[ -z "${CUSTOM_ENV_AUTH_USER:+x}" ] && error "AUTH_USER CI/CD variable has not been set."
+[ -z "${CUSTOM_ENV_AUTH_KEY:+x}" ] && error "AUTH_KEY secret CI/CD variable has not been set."
 
 AUTH_USER=$CUSTOM_ENV_AUTH_USER
 
@@ -50,7 +50,7 @@ exit 1
 
 AUTH_USER_WORK=$(runuser "$AUTH_USER" --login --command "echo \$WORK")
 
-[ -z "$AUTH_USER_WORK" ] && error "Could not determine $AUTH_USER's \$WORK directory."
+[ -z "${AUTH_USER_WORK:+x}" ] && error "Could not determine $AUTH_USER's \$WORK directory."
 
 BASE_DIR=$AUTH_USER_WORK/gitlab-runner/builds/${CUSTOM_ENV_CI_CONCURRENT_PROJECT_ID:?}/${CUSTOM_ENV_CI_PROJECT_NAMESPACE:?}/${CUSTOM_ENV_CI_PROJECT_NAME:?}
 

runner_scripts/root/config.sh

@@ -8,14 +8,14 @@ TXT_GREEN="\e[32m"
 TXT_CLEAR="\e[0m"
 TXT_BOLD="\e[1m"
 
-[ -z "$CUSTOM_ENV_AUTH_USER" ] && error "AUTH_USER CI/CD variable has not been set."
-[ -z "$CUSTOM_ENV_AUTH_KEY" ] && error "AUTH_KEY secret CI/CD variable has not been set."
+[ -z "${CUSTOM_ENV_AUTH_USER:+x}" ] && error "AUTH_USER CI/CD variable has not been set."
+[ -z "${CUSTOM_ENV_AUTH_KEY:+x}" ] && error "AUTH_KEY secret CI/CD variable has not been set."
 
 AUTH_USER=$CUSTOM_ENV_AUTH_USER
 
 AUTH_USER_WORK=$(runuser "$AUTH_USER" --login --command "echo \$WORK")
 
-[ -z "$AUTH_USER_WORK" ] && error "Could not determine $AUTH_USER's \$WORK directory."
+[ -z "${AUTH_USER_WORK:+x}" ] && error "Could not determine $AUTH_USER's \$WORK directory."
 
 cat << EOS
 {

runner_scripts/root/run.sh

@@ -30,8 +30,8 @@ function error {
 
 ## User authentication
 
-[ -z "$CUSTOM_ENV_AUTH_USER" ] && error "AUTH_USER CI/CD variable has not been set."
-[ -z "$CUSTOM_ENV_AUTH_KEY" ] && error "AUTH_KEY secret CI/CD variable has not been set."
+[ -z "${CUSTOM_ENV_AUTH_USER:+x}" ] && error "AUTH_USER CI/CD variable has not been set."
+[ -z "${CUSTOM_ENV_AUTH_KEY:+x}" ] && error "AUTH_KEY secret CI/CD variable has not been set."
 
 AUTH_USER=$CUSTOM_ENV_AUTH_USER
 
@@ -57,7 +57,7 @@ AUTH_USER_HOME=$(getent passwd "$AUTH_USER" | awk -F ":" '{print $6}')
 AUTH_USER_SHELL=$(getent passwd "$AUTH_USER" | awk -F ":" '{print $7}')
 AUTH_USER_WORK=$(runuser "$AUTH_USER" --login --command "echo \$WORK")
 
-[ -z "$AUTH_USER_WORK" ] && error "Could not determine $AUTH_USER's \$WORK directory."
+[ -z "${AUTH_USER_WORK:+x}" ] && error "Could not determine $AUTH_USER's \$WORK directory."
 
 chown -R "$AUTH_USER" "$TMPDIR"