don't leave files with tags.last_change=0.0

add a `tagreader` column to reexamine files later, if the parser has been changed
CAST last_change to TEXT before attempting comparison: FLOATs suck

atom

@@ -704,7 +704,10 @@ gettag() {
 	| sed -n "/^${1}=/I{s/^${1}=//I;p}"
 }
 
+getInfosMP3_version='ID3-0.1'
+tagreaders+=( "$getInfosMP3_version" )
 getInfos::MP3() {
+	tagreader="$getInfosMP3_version"
 	infos=$(
 		soxi -a "$sourcepath/$filename" 2>/dev/null
 	)
@@ -715,16 +718,12 @@ getInfos::MP3() {
 	tracknum=$(gettag tracknumber)
 	year=$(gettag year)
 	getRateChannelSoxi
-	[ -n "$album" 		\
-	-o -n "$artist"		\
-	-o -n "$genre"		\
-	-o -n "$title"		\
-	-o -n "$tracknum"	\
-	-o -n "$year" ]		\
-	|| return 1
 }
 
+getInfosOgg_version='Ogg-O.1'
+tagreaders+=( "$getInfosOgg_version" )
 getInfos::Ogg() {
+	tagreader="$getInfosOgg_version"
 	infos=$(
 		ogginfo "$sourcepath/$filename"	\
 		| sed 's/\t//'
@@ -747,20 +746,12 @@ getInfos::Ogg() {
 	infos="${infos//: /=}"
 	rate=$(gettag rate)
 	channels=$(gettag channels)
-	[ -n "$album" 		\
-	-o -n "$albumartist"	\
-	-o -n "$artist"		\
-	-o -n "$composer"	\
-	-o -n "$disc"		\
-	-o -n "$genre"		\
-	-o -n "$performer"	\
-	-o -n "$title"		\
-	-o -n "$tracknum"	\
-	-o -n "$year" ]		\
-	|| return 1
 }
 
+getInfosFLAC_version='FLAC-0.1'
+tagreaders+=( "$getInfosFLAC_version" )
 getInfos::FLAC() {
+	tagreader="$getInfosFLAC_version"
 	infos=$(
 		metaflac			\
 			--show-tag=ALBUM	\
@@ -800,24 +791,16 @@ getInfos::FLAC() {
 			--show-channels		\
 			"$sourcepath/$filename"
 	)
-	[ -n "$album" 		\
-	-o -n "$albumartist"	\
-	-o -n "$artist"		\
-	-o -n "$composer"	\
-	-o -n "$disc"		\
-	-o -n "$genre"		\
-	-o -n "$performer"	\
-	-o -n "$title"		\
-	-o -n "$tracknum"	\
-	-o -n "$year" ]		\
-	|| return 1
 }
 
+getInfosAPE_version='APE-0.1'
+tagreaders+=( "$getInfosAPE_version" )
 getInfos::APE() {
 	# I was not able to find a decent cli tool to read APE tags.
 	# This is raw but works for the very few MusePack files I got.
 	#
 	# Please tell me if you know of any good tool.
+	tagreader="$getInfosAPE_version"
 	IFS='='
 	while read tag value
 	do
@@ -863,17 +846,6 @@ getInfos::APE() {
 		'^(Album Artist|Artist|Year|Album|Title|Track|Genre|Composer|Performer)='
 	)
 	IFS="$oldIFS"
-	[ -n "$album" 		\
-	-o -n "$albumartist"	\
-	-o -n "$artist"		\
-	-o -n "$composer"	\
-	-o -n "$disc"		\
-	-o -n "$genre"		\
-	-o -n "$performer"	\
-	-o -n "$title"		\
-	-o -n "$tracknum"	\
-	-o -n "$year" ]		\
-	|| return 1
 }
 
 tryAPE() {
@@ -882,6 +854,8 @@ tryAPE() {
 	&& type=APE
 }
 
+getTags_version='unknown-0.1'
+tagreaders+=( "$getTags_version" )
 getTags() {
 	unset type
 	case "$mimetype" in
@@ -913,9 +887,9 @@ getTags() {
 	esac
 	if [ -n "$type" ]
 	then
-		getInfos::$type || return 1
+		getInfos::$type
 	else
-		return 1
+		tagreader=$getTags_version
 	fi
 }
 
@@ -1037,6 +1011,10 @@ updateMimes
 removeObsoleteFiles
 
 # get files
+for reader in "${tagreaders[@]}"
+do
+	tagreaderclause+="${tagreaderclause:+ AND }NOT tags.tagreader = \"$reader\""
+done
 echo '
 	SELECT	COUNT(DISTINCT source_files.filename)
 	FROM			source_files
@@ -1049,8 +1027,12 @@ echo '
 		INNER JOIN	tags
 			ON	source_files.id=tags.source_file
 	WHERE	mime_type_actions.id = source_files.mime_type
-	AND NOT	destination_files.last_change = source_files.last_change
-	AND NOT	tags.last_change = source_files.last_change
+	AND	(
+				CAST(tags.last_change AS TEXT)
+				<>
+				CAST(source_files.last_change AS TEXT)
+			OR	('"$tagreaderclause"')
+		)
 	AND	mime_type_actions.action = 1;' >&3
 read -u4 filecount
 echo '
@@ -1069,8 +1051,12 @@ echo '
 		INNER JOIN	tags
 			ON	source_files.id=tags.source_file
 	WHERE	mime_type_actions.id = source_files.mime_type
-	AND NOT	destination_files.last_change = source_files.last_change
-	AND NOT	tags.last_change = source_files.last_change
+	AND	(
+				CAST(tags.last_change AS TEXT)
+				<>
+				CAST(source_files.last_change AS TEXT)
+			OR	('"$tagreaderclause"')
+		)
 	AND	mime_type_actions.action = 1;
 
 	SELECT "AtOM:NoMoreFiles";' >&3
@@ -1112,6 +1098,7 @@ do
 		last_change	"$lastchange"	\
 		rate		"$rate"		\
 		channels	"$channels"	\
+		tagreader	"$tagreader"	\
 	>/dev/null <<<"source_file = $sourcefileid"
 	unset	genre		\
 		albumartist	\

share/schema.sql

@@ -53,6 +53,7 @@ CREATE TABLE tags (
 	rate		INTEGER,
 	channels	INTEGER,
 	last_change	FLOAT,
+	tagreader	TEXT,
 	FOREIGN KEY (source_file)	REFERENCES source_files(id)
 		ON DELETE CASCADE
 );