Add logging to INT, TERM, and QUIT handlers

Changes

@@ -3,6 +3,8 @@ Revision history for Perl extension PGXN::Manager
 0.31.2
        - Combined the pgxn_consumer PID number and file location into one
          output.
+       - Configured handlers for INT, TERM, and QUIT signals to log flagging
+         for shutdown in the next loop.
 
 0.31.1   2023-10-07T21:40:53Z
        - Restored the writing of the pgxn_consumer PID file, accidentally

lib/PGXN/Manager/Consumer.pm

@@ -81,10 +81,18 @@ sub go {
     $cfg->{log_fh} = _log_fh delete $cfg->{'log-file'};
     $cfg->{pid_file} = delete $cfg->{'pid-file'} if exists $cfg->{'pid-file'};
     my $cmd = $class->new( $cfg );
-    $SIG{QUIT} = $SIG{INT} = $SIG{TERM} = sub { $cmd->continue(0) };
+    $SIG{$_} = $cmd->_signal_handler($_) for qw(TERM INT QUIT);
     $cmd->run(@ARGV);
 }
 
+sub _signal_handler {
+    my ($self, $sig) = @_;
+    return sub {
+        $self->log("INFO: $sig signal caught; flagging shutdown for next loop");
+        $self->continue(0);
+    };
+}
+
 sub DEMOLISH {
     my $self = shift;
     if (my $path = $self->pid_file) {