Added destination directory

multiple files wildcard need an destination directory given as 3rd argument.

srcset.sh

@@ -1,31 +1,46 @@
 #!/bin/sh
 if [[ $# -eq 0 ]] ; then
-    echo 'Filename needed'
+    echo 'File needed'
     exit 1
 fi
 
-filename="$1"
-basename=${filename%.*}
-type="${filename##*.}"
+input="$1"
+pathfile=${input%.*}
+type="${input##*.}"
 
 quality=80
 if ! [[ -z "$2" ]] ; then
   quality=$2
 fi
+
+final="$pathfile"
+if ! [[ -z "$3" ]] ; then
+  # filename with no path
+  filename="${input##*/}"  
+  final="$3/${filename%.*}"
+fi
+
 # change convert options as needed
 options="-strip -interlace Plane -quality $quality"
 
-echo "Resizing $filename to 320,480,640,768,960,1024,1280,1440 sizes using $quality quality"
+echo "Resizing $input to 320,480,640,768,960,1024,1280,1440 sizes using $quality quality"
 
 # Various resizes
-convert $options -adaptive-resize 320 "$filename" "$basename-320w.$type"
-convert $options -adaptive-resize 480 "$filename" "$basename-480w.$type"
-convert $options -adaptive-resize 640 "$filename" "$basename-640w.$type"
-convert $options -adaptive-resize 768 "$filename" "$basename-768w.$type"
-convert $options -adaptive-resize 960 "$filename" "$basename-960w.$type"
-convert $options -adaptive-resize 1024 "$filename" "$basename-1024w.$type"
-convert $options -adaptive-resize 1280 "$filename" "$basename-1280w.$type"
-convert $options -adaptive-resize 1440 "$filename" "$basename-1440w.$type"
-echo ""
-
-echo '<img src="'$basename-768w.$type'" srcset="'$basename-320w.$type' 320w, '$basename-480w.$type' 480w, '$basename-640w.$type' 640w, '$basename-768w.$type' 768w, '$basename-960w.$type' 960w, '$basename-1024w.$type' 1024w, '$basename-1440w.$type' 1440w", sizes="(min-width: 768px) 50vw, 100vw" alt="An image named '$filename'"/>'
+convert $options -adaptive-resize 320 "$input" "$final-320w.$type"
+
+convert $options -adaptive-resize 480 "$input" "$final-480w.$type"
+convert $options -adaptive-resize 640 "$input" "$final-640w.$type"
+convert $options -adaptive-resize 768 "$input" "$final-768w.$type"
+convert $options -adaptive-resize 960 "$input" "$final-960w.$type"
+convert $options -adaptive-resize 1024 "$input" "$final-1024w.$type"
+convert $options -adaptive-resize 1280 "$input" "$final-1280w.$type"
+convert $options -adaptive-resize 1440 "$input" "$final-1440w.$type"
+
+str='<img src="'$final-480w.$type'" srcset="'$final-320w.$type' 320w, '$final-480w.$type' 480w, '$final-640w.$type' 640w, '$final-768w.$type' 768w, '$final-960w.$type' 960w, '$final-1024w.$type' 1024w, '$final-1440w.$type' 1440w", sizes="(min-width: 768px) 50vw, 100vw" alt="An image named '$input'"/>'
+
+if ! [[ -z "$3" ]] ; then
+  echo "$str" > "$final-srcset.html"
+  echo "more $final-srcset.html"	
+else
+  echo "$str"
+fi