Fix unbound variable error in install script

install/_lib.sh

@@ -56,7 +56,6 @@ function ensure_file_from_example {
 # Check the version of $1 is greater than or equal to $2 using sort. Note: versions must be stripped of "v"
 function vergte() {
   printf "%s\n%s" $1 $2 | sort --version-sort --check=quiet --reverse
-  echo $?
 }
 
 SENTRY_CONFIG_PY=sentry/sentry.conf.py

install/check-minimum-requirements.sh

@@ -8,26 +8,26 @@ if [[ -z "$DOCKER_VERSION" ]]; then
   exit 1
 fi
 
-if [[ "$(vergte ${DOCKER_VERSION//v/} $MIN_DOCKER_VERSION)" -eq 1 ]]; then
+if ! vergte ${DOCKER_VERSION//v/} $MIN_DOCKER_VERSION ; then
   echo "FAIL: Expected minimum docker version to be $MIN_DOCKER_VERSION but found $DOCKER_VERSION"
   exit 1
 fi
 echo "Found Docker version $DOCKER_VERSION"
 
-if [[ "$(vergte ${COMPOSE_VERSION//v/} $MIN_COMPOSE_VERSION)" -eq 1 ]]; then
+if ! vergte ${COMPOSE_VERSION//v/} $MIN_COMPOSE_VERSION ; then
   echo "FAIL: Expected minimum $dc_base version to be $MIN_COMPOSE_VERSION but found $COMPOSE_VERSION"
   exit 1
 fi
 echo "Found Docker Compose version $COMPOSE_VERSION"
 
 CPU_AVAILABLE_IN_DOCKER=$(docker run --rm busybox nproc --all)
-if [[ "$CPU_AVAILABLE_IN_DOCKER" -lt "$MIN_CPU_HARD" ]]; then
+if [[ "$CPU_AVAILABLE_IN_DOCKER" -lt "$MIN_CPU_HARD" ]] ; then
   echo "FAIL: Required minimum CPU cores available to Docker is $MIN_CPU_HARD, found $CPU_AVAILABLE_IN_DOCKER"
   exit 1
 fi
 
 RAM_AVAILABLE_IN_DOCKER=$(docker run --rm busybox free -m 2>/dev/null | awk '/Mem/ {print $2}')
-if [[ "$RAM_AVAILABLE_IN_DOCKER" -lt "$MIN_RAM_HARD" ]]; then
+if [[ "$RAM_AVAILABLE_IN_DOCKER" -lt "$MIN_RAM_HARD" ]] ; then
   echo "FAIL: Required minimum RAM available to Docker is $MIN_RAM_HARD MB, found $RAM_AVAILABLE_IN_DOCKER MB"
   exit 1
 fi

install/dc-detect-version.sh

@@ -21,7 +21,7 @@ if [[ -z "$COMPOSE_VERSION" && -z "$STANDALONE_COMPOSE_VERSION" ]]; then
 fi
 
 if [[ ! -z "${STANDALONE_COMPOSE_VERSION}" ]]; then
-  if [[ "$(vergte ${COMPOSE_VERSION//v/} ${STANDALONE_COMPOSE_VERSION//v/})" -eq 1 ]]; then
+  if ! vergte ${COMPOSE_VERSION//v/} ${STANDALONE_COMPOSE_VERSION//v/}; then
     COMPOSE_VERSION="${STANDALONE_COMPOSE_VERSION}"
     dc_base="$dc_base_standalone"
   fi