Do not leave cache mess

dotfiles/i3/bin/cstatus

@@ -33,7 +33,9 @@ mktext() {
     local value
     local key
     local color_attr
-    qdbus org.mpris.clementine /Player org.freedesktop.MediaPlayer.GetMetadata >"$CACHE"
+    local cache
+    cache=$(mktemp -t cstatus.GetMetadata.XXXXXXXX)
+    qdbus org.mpris.clementine /Player org.freedesktop.MediaPlayer.GetMetadata >"$cache"
     case $(qdbus org.mpris.clementine /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.PlaybackStatus) in
         Stopped)    sigil=""; sigilcolor= ;;
         Playing)    sigil=""; sigilcolor=green ;;
@@ -51,15 +53,14 @@ mktext() {
             tracknumber)  tracknumber=$value ;;
             title)        title=$value ;;
         esac
-    done <"$CACHE"
+    done <"$cache"
     printf "%s [%d %s]: %02d %s (%s) <span%s>%s</span>" \
         "$artist" "$year" "$album" "$tracknumber" "$title" \
         "$(getpos)" \
         "$color_attr" "$sigil"
+    rm "$cache"
 }
 
-CACHE=$(mktemp -t cstatus.GetMetadata.XXXXXXXX)
-
 main() {
     local head=true
     echo '{"version":1}'