fix: add xx: entries to all additives

scripts/snippets/add_xx_entry_to_additives.pl

@@ -0,0 +1,44 @@
+#!/usr/bin/perl -w
+
+# This file is part of Product Opener.
+#
+# Product Opener
+# Copyright (C) 2011-2023 Association Open Food Facts
+# Contact: [email protected]
+# Address: 21 rue des Iles, 94100 Saint-Maur des Fossés, France
+#
+# Product Opener is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# This scripts adds a xx: entry to additives in the additives taxonomy
+# with the e-number of the additive
+
+# Usage: ./add_xx_entry_to_additives.pl < additives.txt > additives.xx.txt
+
+use ProductOpener::PerlStandards;
+
+my $e_number;
+
+while (my $line = <STDIN>) {
+
+	if ($line =~ /^\w\w:(E(?:[^,]+))/) {
+		$e_number = $1;
+		chomp($e_number);
+	}
+	if ((defined $e_number) and (($line =~ /^\s*$/) or ($line =~ /^(#|e_number:|wikidata|efsa)/))) {
+		print "xx:$e_number\n";
+		$e_number = undef;
+	}
+
+	print $line;
+}