Separated function get_format from clone

qq2clone

@@ -1531,7 +1531,7 @@ local name uuid
 
 local storage="${OPT[STORAGE]}"
 declare -a f_arr
-local img new_img j=-1 type level
+local img new_img j=-1 type
 
 local disks
 disks="$(sqlite3 "select disks from TEMPLATES where\
@@ -1541,15 +1541,7 @@ trap 'rm -f "${storage}/${name}.${uuid:?}.*"' INT
 while read -r img; do
   ((j++))
   new_img="${storage}/${name}.${uuid}.${j}.qcow2"
-  level=0
-  while read -r line; do
-    [[ "$line" =~ \{[[:space:]]*$ ]] && { ((level++)); continue; }
-    [[ "$line" =~ \},?[[:space:]]*$ ]] && { ((level--)); continue; }
-    if ((level == 1)); then
-      [[ "$line" =~ \"format\":[[:space:]]*\"(.*)\" ]] &&
-        type="${BASH_REMATCH[1]}"
-    fi
-  done < <(qemu-img info --output=json "$img")
+  type="$(get_format "$img")"
   qemu-img create -f qcow2 -F "$type" -b "$img" "$new_img"\
     &>/dev/null ||
       { rm -f "${storage}/${name}.${uuid:?}.*";
@@ -1558,7 +1550,6 @@ while read -r img; do
   f_arr[${#f_arr[@]}]="$new_img"
 done < <(echo "$disks")
 
-
 virt-clone --original-xml "$txml" --name "$name" --uuid "$uuid"\
     --preserve-data "${f_arr[@]}" &>/dev/null ||
       { rm -f "${storage}/${name}.${uuid:?}.*";
@@ -1776,6 +1767,26 @@ trap 'exit' INT
 return 0
 }
 #=========================================================================#
+get_format ()
+# DESCRIPTION: Find format of given virtual machine image file
+# INPUT: Absolute filepath to a virtual machine image file
+# OUTPUT: Echoes the name of the format
+# PARAMETERS: $1: Filepath
+#=========================================================================#
+{
+local line level=0
+while read -r line; do
+    [[ "$line" =~ \{[[:space:]]*$ ]] && { ((level++)); continue; }
+    [[ "$line" =~ \},?[[:space:]]*$ ]] && { ((level--)); continue; }
+    if ((level == 1)); then
+      [[ "$line" =~ \"format\":[[:space:]]*\"(.*)\" ]] &&
+        { echo "${BASH_REMATCH[1]}";
+          return 0; }
+    fi
+done < <(qemu-img info --output=json "$1")
+return 1
+}
+#=========================================================================#
 get_template_list ()
 # DESCRIPTION: List existing templates, alphabetically ordered, one per 
 #  line