chg: [0km] make ``vps-stats`` action a little more friendlier in case of missing data

bin/0km

@@ -1283,6 +1283,7 @@ cmdline.spec::cmd:vps-stats:run() {
                             return 1
                         }
                         while true; do
+                            if ssh:run "root@$vps" -- "[ -d '/var/lib/vps/rrd' ]"; then
                                 echo "${WHITE}Collecting stats${NORMAL}..."
                                 {
                                     {
@@ -1291,6 +1292,9 @@ cmdline.spec::cmd:vps-stats:run() {
                                     set_errlvl "${PIPESTATUS[0]}"
                                 } 3>&1 1>&2 2>&3 | prefix " ${GRAY}|${NORMAL} "
                                 echo " ${GRAY}..${NORMAL} ${DARKGREEN}done${NORMAL} collecting stats"
+                            else
+                                warn "No stats found. Did you run 'myc-update' on the vps ?."
+                            fi
                             [ -z "$opt_follow" ] && break
                             echo "${WHITE}Sleeping ${DARKYELLOW}${opt_interval:-60}${NORMAL}s..."
                             sleep "${opt_interval:-60}"
@@ -1343,15 +1347,18 @@ cmdline.spec::cmd:vps-stats:run() {
             data_stop_ts=
             for resource in "${resources[@]}"; do
                 for vps in "${VPS[@]}"; do
-                    rrd_vps_path="$VAR_DIR/rrd/$vps"
-                    [ -d "$rrd_vps_path" ] || {
-                        warn "No data yet for vps '$vps'... Ignoring"
-                        continue
-                    }
                     ((i++))
-                    out=$(graph:def:"${resource}" "$vps" "$i" "${opts_rrdfetch[@]}")
-                    printf "%s\n" "$out" >/tmp/toto.gnuplot
-                    printf "%s\n" "$out"
+                    {
+                        {
+                            rrd_vps_path="$VAR_DIR/rrd/$vps"
+                            if [ -d "$rrd_vps_path" ]; then
+                                graph:def:"${resource}" "$vps" "$i" "${opts_rrdfetch[@]}"
+                            else
+                                warn "No data yet, ignoring..."
+                            fi
+                        } 3>&1 1>&2 2>&3 | prefix " ${DARKRED}\!${GRAY} graph(${DARKCYAN}$vps${GRAY}:${WHITE}$resource${NORMAL})${NORMAL} "
+                        set_errlvl "${PIPESTATUS[0]}"
+                    } 3>&1 1>&2 2>&3 || continue 1
                 done
             done
         } >&$PFD