Add the script that fills cover information semi-automatically.

utils/cover.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+for directory in songs/*; do
+    images=`ls $directory/*.{jpg,png} 2> /dev/null`
+    val=`echo $images | wc -w`
+    for song in $directory/*.sg; do
+	sg=`basename $song`
+	sed -i '0,/\\gtab/s//\\cover\n\\gtab/' $song
+	if [ $val -gt 1 ] 
+	then
+	    i=1
+	    for image in $images; do
+		img=`basename $image .jpg`
+		img=`echo $img | sed 's/.png$//'`
+		echo "Apply $img to $song ? ($i/$val)"
+		i=$(($i+1))
+		read answer
+		case "$answer" in
+		    "y")
+			sed -i 's/beginsong{\([^}]*\)}\[\([^]]*\)\]/beginsong{\1}[\2,cov='$img']/' $song
+			break;
+			;;
+		    "n")
+			true
+			;;
+		esac
+	    done; 
+	elif [ $val -eq 1 ] 
+	then
+	    img=`basename $images .jpg`
+	    img=`echo $img | sed 's/.png$//'`
+	    echo "Applying $img to $sg"
+	    sed -i 's/beginsong{\([^}]*\)}\[\([^]]*\)\]/beginsong{\1}[\2,cov='$img']/' $song
+	fi;
+    done; 
+done;