Add a Makefile for the book builder stuff.

[remoteglot] / remoteglot.pl

diff --git a/remoteglot.pl b/remoteglot.pl
index 61e7237b1d2926b632f141dc50ef481858c41872..6a5778a0b96b3c321d0095b21fa92bd67d018904 100755 (executable)
--- a/remoteglot.pl
+++ b/remoteglot.pl
@@ -35,6 +35,7 @@ my $stop_pgn_fetch = 0;
 my $tb_retry_timer = undef;
 my %tb_cache = ();
 my $tb_lookup_running = 0;
+my $last_written_json = undef;
 
 # TODO: Persist (parts of) this so that we can restart.
 my %clock_target_for_pos = ();
@@ -760,8 +761,10 @@ sub output_json {
        $json->{'refutation_lines'} = \%refutation_lines;
 
        my $encoded = JSON::XS::encode_json($json);
-       unless ($historic_json_only || !defined($remoteglotconf::json_output)) {
+       unless ($historic_json_only || !defined($remoteglotconf::json_output) ||
+               (defined($last_written_json) && $last_written_json eq $encoded)) {
                atomic_set_contents($remoteglotconf::json_output, $encoded);
+               $last_written_json = $encoded;
        }
 
        if (exists($pos_calculating->{'pretty_history'}) &&