utf-8 is new default of ".once", but --bom option is added

Author: stonebig

sqlite_bro/sqlite_bro.py

@@ -738,8 +738,13 @@ def bip(c):
                 try:
                     if shell_list[0] == '.once':
                         shell_list[0] = ' '
-                        encode_in = 'utf-8-sig' if os.name == 'nt' else 'utf-8'
-                        csv_file=shell_list[1]
+                        encode_in = 'utf-8'
+                        if '--bom' in shell_list:  # keep access to the option
+                            encode_in = 'utf-8-sig'
+                        if shell_list[1] =='--bom':
+                            csv_file = shell_list[2]
+                        else:
+                            csv_file = shell_list[1]
                         if (csv_file+"z")[0] == "~":
                             csv_file = os.path.join(self.home , csv_file[1:])
                         self.conn.export_writer(instruction, csv_file,
@@ -1620,10 +1625,10 @@ def _main():
 SELECT ItemNo, Description FROM Item;  -- see all is back to normal
 RELEASE SAVEPOINT remember_Neo; -- free memory
 \n\n-- '.' commands understood:
--- .once FILENAME         Output for the next SQL command only to FILENAME
+-- .once [--bom] FILENAME Output of next SQL command to FILENAME [with utf-8 bom]
 -- .import FILE TABLE     Import data from FILE into TABLE
 -- (create table only if it doesn't exist, keep existing records)
-.once '~this_file_of_result.txt'
+.once --bom '~this_file_of_result.txt'
 select ItemNo, Description from item order by ItemNo desc;
 .import '~this_file_of_result.txt' in_this_table