backport: scripts/feeds: add a new command that allows generating a new feeds.conf

This can be used inside build setups for easy feeds.conf generation.

Signed-off-by: John Crispin <john@phrozen.org>
(cherry picked from commit f039f68dcbf26b424028f39f9dd80cd4c89ea9be)

scripts/feeds

@@ -880,6 +880,47 @@ sub update {
 	return $failed;
 }
 
+sub setup {
+	my %opts;
+
+	getopts('bh', \%opts);
+
+	if ($opts{h}) {
+		usage();
+		return 0;
+	}
+
+	if (-e "feeds.conf") {
+		warn "The file feeds.conf already exists.\n";
+		return 1;
+	}
+
+	open(my $fd, ">>feeds.conf");
+
+	if ($opts{b}) {
+		printf $fd "src-include defaults feeds.conf.default\n";
+	}
+
+	while (my $entry = shift @ARGV) {
+		my ($type, $name, $src) = split /,/, $entry;
+
+		$update_method{$type} or do {
+			warn "Unknown type '$type' in parameter $entry\n";
+			unlink "feeds.conf";
+			return 1;
+		};
+
+		if ($name =~ /[\s-]/) {
+			warn "Feed names or sources may not contain whitespace or - characters in parameter $entry\n";
+			unlink "feeds.conf";
+			return 1;
+		}
+		printf $fd "%s %s %s\n", $type, $name, $src;
+	}
+
+	return 0;
+}
+
 sub feed_config() {
 	foreach my $feed (@feeds) {
 		my $installed = (-f "feeds/$feed->[1].index");
@@ -933,6 +974,10 @@ Commands:
 	    -i :           Recreate the index only. No feed update from repository is performed.
 	    -f :           Force updating feeds even if there are changed, uncommitted files.
 
+	setup [options] <type,name,link> <type,name,link> ...: generate feeds.conf
+	Options:
+	    -b :           Use feeds.conf.default as base for new feeds.conf.
+
 	clean:             Remove downloaded/generated files.
 
 EOF
@@ -946,6 +991,7 @@ my %commands = (
 	'search' => \&search,
 	'uninstall' => \&uninstall,
 	'feed_config' => \&feed_config,
+	'setup' => \&setup,
 	'clean' => sub {
 		system("rm -rf ./feeds ./package/feeds ./target/linux/feeds");
 	}