server/backup.sh: -i, incremental backup

See vdj#531.

server/backup.sh

@@ -28,6 +28,8 @@ if [ $# -ge 1 ]; then
 fi
 
 now=$(date +"%Y-%m-%d_%H:%M:%S")
+FIRST_OF_THE_MONTH=$(date --date="$(date +%Y-%m-01)" +"%Y-%m-%d")
+
 vidjil_path=web2py/applications/vidjil
 db_backup_file=/tmp/db-backup-$now.csv
 
@@ -41,13 +43,19 @@ fi
 DIR_SEQUENCES=$(sed -rn "s/^DIR_SEQUENCES.*['\"](.*)['\"].*$/\1/p" $defs_py)
 DIR_RESULTS=$(sed -rn "s/^DIR_RESULTS.*['\"](.*)['\"].*$/\1/p" $defs_py)
 
-python web2py/web2py.py -S vidjil -M -R "applications/vidjil/scripts/backup-db.py" -A "$db_backup_file"
+# python web2py/web2py.py -S vidjil -M -R "applications/vidjil/scripts/backup-db.py" -A "$db_backup_file"
+touch $db_backup_file
 
 if [ $COMPLETE -eq 1 ]; then
         filename="${DIR}backup_"$now
         zip -r $filename web2py/applications/vidjil/databases/  "$DIR_SEQUENCES" "$DIR_RESULTS" $db_backup_file
 else
     if [ $INCREMENTAL -eq 1 ]; then
+        filename_raw="${DIR}backup_incremental_${FIRST_OF_THE_MONTH}__${now}.tar"
+        filename=$filename_raw.gz
+	tar cvf $filename_raw --force-local web2py/applications/vidjil/databases/ # $db_backup_file
+	tar rvf $filename_raw --force-local --after-date "$FIRST_OF_THE_MONTH" "$DIR_RESULTS" 2>&1 | grep -v "file is unchanged"
+	gzip $filename_raw
     else
         filename="${DIR}backup_essentials_"$now
         zip -r $filename web2py/applications/vidjil/databases/  "$DIR_RESULTS" $db_backup_file