apt-why: Print error message if the package does not exist

1 files changed, 5 insertions, 0 deletions

diff --git a/bin/apt-why b/bin/apt-why
index 171bba0..e6c5de6 100755
--- a/bin/apt-why
+++ b/bin/apt-why
@@ -50,6 +50,11 @@ sub recurse {
 	recurse($_, $depth) foreach revdeps($name);
 }
 
+unless ($cache->{$packagename}) {
+	print STDERR "No such package: $packagename\n";
+	exit(1);
+}
+
 if ($cache->{$packagename}->{Flags} =~ /Essential/) {
 	print "Essential: Yes\n";
 }