[PATCH] public-inbox-init: fix multi-address setup

[Eric Wong <e@80x24.org>]

We must support multi-address mailing lists, so we do not
clobber existing addresses.  However, we need to ensure
idempotency and ensure existing addresses are not reset.

Furthermore, we were not parsing the existing config correctly
due to a leaking $/.
---
 public-inbox-init | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/public-inbox-init b/public-inbox-init
index 5fc9d3e..2d24402 100644
--- a/public-inbox-init
+++ b/public-inbox-init
@@ -18,6 +18,7 @@ my $git_dir = shift @ARGV or usage();
 my $http_url = shift @ARGV or usage();
 my (@address) = @ARGV;
 @address or usage();
+my %seen;
 
 my $pi_config = PublicInbox::Config->default_file;
 my $dir = dirname($pi_config);
@@ -25,8 +26,11 @@ mkpath($dir); # will croak on fatal errors
 my ($fh, $filename) = tempfile('pi-init-XXXXXXXX', DIR => $dir);
 if (-e $pi_config) {
 	open(my $oh, '<', $pi_config) or die "unable to read $pi_config: $!\n";
-	local $/;
-	my $old = <$oh>;
+	my $old;
+	{
+		local $/;
+		$old = <$oh>;
+	}
 	print $fh $old or die "failed to write: $!\n";
 	close $oh or die "failed to close $pi_config: $!\n";
 
@@ -36,12 +40,16 @@ if (-e $pi_config) {
 	my $conflict;
 	foreach my $addr (@address) {
 		my $found = $cfg->lookup($addr);
-		if ($found && ($found->{listname} ne $name)) {
-			print STDERR
-				"`$addr' already defined for ",
-				"`$found->{listname}',\n",
-				"does not match intend `$name'\n";
-			$conflict = 1;
+		if ($found) {
+			if ($found->{listname} ne $name) {
+				print STDERR
+					"`$addr' already defined for ",
+					"`$found->{listname}',\n",
+					"does not match intend `$name'\n";
+				$conflict = 1;
+			} else {
+				$seen{lc($addr)} = 1;
+			}
 		}
 	}
 
@@ -54,7 +62,8 @@ my @x = (qw/git config/, "--file=$filename");
 $git_dir = expand_filename($git_dir);
 x(qw(git init -q --bare), $git_dir);
 foreach my $addr (@address) {
-	x(@x, "$pfx.address", $addr);
+	next if $seen{lc($addr)};
+	x(@x, "--add", "$pfx.address", $addr);
 }
 x(@x, "$pfx.url", $http_url);
 x(@x, "$pfx.mainrepo", $git_dir);
-- 
EW