fix: ``xargs`` would complain about ``LINE_MAX`` for some reason on some hosts.

Dockerfile

@@ -13,7 +13,7 @@ ENV KAL_SHLIB_ARRAY_VERSION="0.2.0" \
     KAL_SHLIB_CACHE_VERSION="0.0.1" \
     KAL_SHLIB_CHARM_VERSION="0.4.1" \
     KAL_SHLIB_CMDLINE_VERSION="0.0.5" \
-    KAL_SHLIB_COMMON_VERSION="0.4.13" \
+    KAL_SHLIB_COMMON_VERSION="0.4.14" \
     KAL_SHLIB_CONFIG_VERSION="0.0.2" \
     KAL_SHLIB_CORE_VERSION="0.7.0" \
     KAL_SHLIB_FIREWALL_VERSION="0.2.0" \

bin/compose-core

@@ -3058,7 +3058,7 @@ export -f get_volumes_for_container
 is_volume_used() {
     local volume="$1" container_id src dst
 
-    while read container_id; do
+    while read -r container_id; do
         while read-0 src dst; do
             [[ "$src" == "$volume"/* ]] && return 0
         done < <(get_volumes_for_container "$container_id")
@@ -3315,7 +3315,7 @@ get_master_services() {
         fi
         echo "$master_service"
         loaded["$master_service"]=1
-    done | xargs printf "%s "
+    done | nspc
     return "${PIPESTATUS[0]}"
 }
 export -f get_master_services
@@ -3392,7 +3392,7 @@ get_docker_compose_usage() {
     echo "$docker_compose_help_msg" |
         grep -m 1 "^Usage:" -A 10000 |
         egrep -m 1 "^\$"    -B 10000 |
-        xargs printf "%s " |
+        nspc |
         sed -r 's/^Usage: //g' |
         tee "$cache_file" || return 1
 }
@@ -3486,13 +3486,13 @@ _MULTIOPTION_REGEX_LINE_FILTER=$_MULTIOPTION_REGEX'(\s|=)'
 multi_opts_filter() {
      egrep "$_MULTIOPTION_REGEX_LINE_FILTER" |
         sed -r "s/^($_MULTIOPTION_REGEX)(\s|=).*$/\1/g" |
-        tr ',' "\n" | xargs printf "%s "
+        tr ',' "\n" | nspc
 }
 
 
 single_opts_filter() {
     egrep -v "$_MULTIOPTION_REGEX_LINE_FILTER" |
-        tr ',' "\n" | xargs printf "%s "
+        tr ',' "\n" | nspc
 }