createindex: Top 10 artists

toys/createindex

@@ -619,7 +619,57 @@ do
 done
 unset line genre count rest genres counts maxgenrelen maxcountlen
 
-'
+echo '
+
+Top 10 artists:'
+maxartistlen=6
+maxcountlen=5
+unset counts artists
+echo '
+	SELECT		artist,
+			COUNT(*)
+	FROM		tags
+	WHERE		artist NOT NULL
+	GROUP BY	artist
+	ORDER BY	COUNT(*) DESC
+	LIMIT		10;
+	
+SELECT	"AtOM:NoMoreFiles";' >&3
+
+read -u4 line
+until [[ $line == AtOM:NoMoreFiles ]]
+do
+	artist="${line%%::AtOM:SQL:Sep::*}"
+	rest="${line#*::AtOM:SQL:Sep::}::AtOM:SQL:Sep::"
+	count="${rest%%::AtOM:SQL:Sep::*}"
+	counts+=( "$count" )
+	artists+=( "$artist" )
+	maxcountlen=$(( ${#count} > maxcountlen ? ${#count} : maxcountlen ))
+	maxartistlen=$(( ${#artist} > maxartistlen ? ${#artist} : maxartistlen ))
+	read -u4 line
+done
+head=$(
+	printf "|  # | %'${maxcoutlen}s | %-${maxartistlen}s |"	\
+		Count Artist
+)
+sep=${head//[^|]/-}
+sep=${sep//\|/+}
+echo "$sep"
+echo "$head"
+echo "$sep"
+for id in ${!artists[@]}
+do
+	printf "| %2i | %'${maxcountlen}i | %-${maxartistlen}s |\n"	\
+		$(( id + 1 ))						\
+		"${counts[id]}"						\
+		"${artists[id]}"
+	echo "$sep"
+done
+unset line artist count rest artists counts maxartistlen maxcountlen
+
+echo '
+
+File formats:'
 echo '
 	SELECT		COUNT(*),SUM(size)
 	FROM		source_files