dgit: Use distro-info-data to resolve unknown suites to distros

Closes: #931212
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 17 insertions, 0 deletions

diff --git a/dgit b/dgit
index fde8d61..962bca1 100755
--- a/dgit
+++ b/dgit
@@ -46,6 +46,7 @@ use Digest::SHA;
 use Digest::MD5;
 use List::MoreUtils qw(pairwise);
 use Text::Glob qw(match_glob);
+use Text::CSV;
 use Fcntl qw(:DEFAULT :flock);
 use Carp;
 
@@ -867,6 +868,22 @@ sub access_basedistro__noalias () {
 		return $kl->{$k};
 	    }
 	}
+	foreach my $csvf (</usr/share/distro-info/*.csv>) {
+	    my $csv_distro =
+		$csvf =~ m{/(\w+)\.csv$} ? $1 : do {
+		    printdebug "skipping $csvf\n";
+		    next;
+		};
+	    my $csv = Text::CSV->new({ binary => 1, auto_diag => 2 }) or die;
+	    my $fh = new IO::File $csvf, "<:encoding(utf8)"
+		or die "open $csvf: $!";
+	    while (my $cols = $csv->getline($fh)) {
+		next unless $cols->[2] eq $isuite;
+		return $csv_distro;
+	    }
+	    die "$csvf $!" if $fh->error;
+	    close $fh;
+	}
 	return cfg("dgit.default.distro");
     }
 }