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hack/lib/util.sh: fix empty array expansion with bash 3.

pull/564/head
Ismo Puustinen 2019-03-05 18:34:10 +02:00
parent 257205d656
commit ecb6d13253
1 changed files with 3 additions and 1 deletions
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4
hack/lib/util.sh
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@ -649,7 +649,9 @@ EOF
# Determines if docker can be run, failures may simply require that the user be added to the docker group. # Determines if docker can be run, failures may simply require that the user be added to the docker group.
function kube::util::ensure_docker_daemon_connectivity { function kube::util::ensure_docker_daemon_connectivity {
IFS=" " read -ra DOCKER <<< "${DOCKER_OPTS}" IFS=" " read -ra DOCKER <<< "${DOCKER_OPTS}"
DOCKER=(docker "${DOCKER[@]}") # Expand ${DOCKER[@]} only if it's not unset. This is to work around
# Bash 3 issue with unbound variable.
DOCKER=(docker ${DOCKER[@]:+"${DOCKER[@]}"})
if ! "${DOCKER[@]}" info > /dev/null 2>&1 ; then if ! "${DOCKER[@]}" info > /dev/null 2>&1 ; then
cat <<'EOF' >&2 cat <<'EOF' >&2
Can't connect to 'docker' daemon. please fix and retry. Can't connect to 'docker' daemon. please fix and retry.