feat!: add snapdiff, custom dist path

.gitignore

@@ -3,3 +3,5 @@ sources.txt
 
 .DS_Store
 *.log
+.tmp
+.vscode

metube

@@ -6,15 +6,35 @@ main() {
 
 download() {
 	local src_file="$1"
+	local dist="$2"
+	[ -z "$dist" ] && dist="dist"
 	cat $src_file | while read src
 	do
 		local playlist=`echo $src | awk -F , '{print $1}'`
 		local link=`echo $src | awk -F , '{print $2}'`
 		echo \> playlist $playlist - link $link
-		mkdir -p "./dist" "./dist/$playlist"
-		youtube-dl -cix --add-metadata --download-archive "./dist/$playlist/.archive" --audio-format mp3 -o "./dist/$playlist/%(title)s.%(ext)s" "$link"
-		eyed3 -A "$playlist" -G "$playlist" "./dist/$playlist"
+		mkdir -p "$dist" "$dist/$playlist"
+		youtube-dl -cix --add-metadata --download-archive "$dist/$playlist/.archive" --audio-format mp3 -o "$dist/$playlist/%(title)s.%(ext)s" "$link"
+		eyed3 -A "$playlist" -G "$playlist" "$dist/$playlist"
 	done
+	snapdiff $dist
+}
+
+snapdiff() {
+	local dist="$1"
+	local ts=`date '+%F %H:%M:%S'`
+	local snapshot="$dist/snapshot"
+	local snapshot_old="$dist/snapshot_old"
+	echo > $snapshot_old
+	[ -f "$snapshot" ] && mv -f "$snapshot" "$snapshot_old"
+	printf "$ts\n---\n" > "$snapshot"
+	snap "$dist" >> "$snapshot"
+	git diff --no-index "$snapshot_old" "$snapshot" > "$dist/update"
+}
+
+snap() {
+	local dist="$1"
+	find $dist -type f -name '*.mp3' | sed "s|^$dist/||"
 }
 
 install() {