scripts: make metalk8s archives pillar accessible globally

Also ensure that archive names are not splitted on
space which was not the case.

Refs: #3079

scripts/iso-manager.sh

@@ -21,6 +21,7 @@ _usage() {
 }
 
 ARCHIVES=()
+CONFIGURED_ARCHIVES=()
 
 while (( "$#" )); do
   case "$1" in
@@ -79,6 +80,11 @@ _set_env() {
     fi
 }
 
+get_configured_archives() {
+    salt-call pillar.get metalk8s:archives --out yaml |
+        sed -rn 's/^- (.+)$/\1/p'
+}
+
 _add_archives() {
     # Skip adding archive if None passed
     [ $# -lt 1 ] && return 0
@@ -87,9 +93,7 @@ _add_archives() {
     # local: ["/srv/scality/metalk8s-2.0.0/", "/tmp/metalk8s-2.1.0.iso"]
     # parsed archives:
     # ("/srv/scality/metalk8s-2.0.0/" "/tmp/metalk8s-2.1.0.iso")
-    IFS=" " read -r -a \
-        archives <<< "$(salt-call pillar.get metalk8s:archives \
-        --out txt | cut -d' ' -f2- | tr -d '[],')"
+    local -a archives=("${CONFIGURED_ARCHIVES[@]}")
     for archive in "$@"; do
         if ! contains "$archive" "${archives[@]}"; then
             archives+=("'$archive'")
@@ -146,5 +150,6 @@ _configure_archives() {
 _set_env
 [ -z "$SALTENV" ] && die "saltenv not set"
 
+mapfile -t CONFIGURED_ARCHIVES < <(get_configured_archives)
 run "Add archives" _add_archives ${ARCHIVES[@]+"${ARCHIVES[@]}"}
 run "Configure archives" _configure_archives