allow ignoring microseconds in file timestamps

doc/config

@@ -39,6 +39,11 @@ Sections:
   * debug <level>: Integer. Currently defined values:
       * 1: few additional status informations.
       * 3: log SQL queries.
+  * skip-timestamp-microsec <bool>: Ignore microsecond precision in timestamps.
+      Microsec precise timestamps are still stored as-is in the DB, this
+      setting just impacts comparisons when determining if a file has been
+      changed.
+
 
 [source]
   This section defines where are the files you want transcoded.

doc/example.cfg

@@ -34,6 +34,9 @@ database		/home/user/.local/share/AtOM/atom.db
 #    3: log SQL queries to <temporary-directory>/debug.log
 #debug			1
 
+# * skip-timestamp-microsec: Ignore microsecond precision in timestamps.
+skip-timestamp-microsec	0
+
 
 [source]
 # This section defines where are the files you want transcoded.

lib/config/getGeneral

@@ -75,6 +75,9 @@ getConfigGeneral() {
 		'database')
 			database="$value"
 		;;
+		'skip-timestamp-microsec')
+			skip_us_timestamp="$value"
+		;;
 		debug)
 			(( value > debug )) && debug=$value
 		;;

lib/config/write

@@ -33,6 +33,9 @@ database		$database
 # * debug <level>: Integer.
 #debug			1
 
+# * skip-timestamp-microsec: Ignore microsecond precision in timestamps.
+skip-timestamp-microsec	${skip_us_timestamp:-0}
+
 
 [source]
 # This section defines where are the files you want transcoded.

lib/files/getFiles

@@ -10,10 +10,17 @@ getFiles() {
 	echo 'BEGIN TRANSACTION;' >&3
 	while read time size filename
 	do
+		if (( skip_us_timestamp ))
+		then
+			compare_time=${time%.*}.%
+		else
+			compare_time=$time
+		fi
 		if ! Select source_files id >/dev/null <<-EOWhere
 				filename = $filename
 				mime_type > 0
-				last_change = $time
+				last_change LIKE $compare_time
+				size = $size
 			EOWhere
 		then
 			mimetype=$(file -b --mime-type "$sourcepath/$filename")