From 575774bb6b3be2bb3a611a322819a914f06cfcc1 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 7 Aug 2017 15:06:51 +0200
Subject: [PATCH] specify topic on command-line

---
 mqtt-trend.pl | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mqtt-trend.pl b/mqtt-trend.pl
index e256a45..7047672 100755
--- a/mqtt-trend.pl
+++ b/mqtt-trend.pl
@@ -19,12 +19,15 @@ system "i3-msg layout splitv";
 
 my $border = 2;
 
-open(my $in, '-|', 'mosquitto_sub -h rpi2 -t stat/# -t fade/# -v');
+my $topic = 'fade/#';
+$topic = $ARGV[0] if $ARGV[0];
+
+open(my $in, '-|', "mosquitto_sub -h rpi2 -t '$topic' -v");
 while(<$in>) {
 	s/\s+$//sg;
 
 	my ($t,$v) = split(/\s/,$_,2);
-	warn "$t\t$v\n";
+	print STDERR "$t=$v ";
 
 	if ( ! exists $trend->{$t} && $v =~ m/^\d+/ ) {
 		my $hist = $trend->{hist_spec}->{$t} || $trend->{hist_spec}->{__default};
-- 
2.20.1