From 01dcdb6958f188e5aa30f44f06989e4f0cac8e41 Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Thu, 24 Mar 2016 15:16:48 +0200
Subject: [PATCH] Support configuration via the environment

---
 lib/App/Statsbot.pm | 14 ++++++++++++++
 statsbot            | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/lib/App/Statsbot.pm b/lib/App/Statsbot.pm
index 902f9d3..fcc7959 100644
--- a/lib/App/Statsbot.pm
+++ b/lib/App/Statsbot.pm
@@ -31,6 +31,15 @@ our $SSL = '';
 our @CHANNELS;
 our $DB = '/var/lib/statsbot/db';
 
+{
+	my %cfg = (debug => \$DEBUG, tick => \$TICK, nickname => \$NICKNAME, server => \$SERVER, port => \$PORT, ssl => \$SSL, channels => \@CHANNELS, db => \$DB);
+	for my $var (keys %cfg) {
+		my $key = "STATSBOT_\U$var";
+		${$cfg{$var}} = $ENV{$key} if exists $ENV{$key} && ref $cfg{$var} eq 'SCALAR';
+		@{$cfg{$var}} = split ' ', $ENV{$key} if exists $ENV{$key} && ref $cfg{$var} eq 'ARRAY';
+	}
+}
+
 my $dbh;
 my $insert;
 my $update;
@@ -198,6 +207,11 @@ a channel. It is able to answer queries of the form "In the last <time
 interval>, how much time did <nick> spend in this channel?".
 
 It is configured via global variables in the App::Statsbot package.
+These variables are initialized from environment variables with names
+of the form STATSBOT_DEBUG, STATSBOT_TICK, etc. In the case of array
+variables, the environment variable is treated as a space separated
+list. Each configuration variable has a default value used when it is
+not set explicitly or via the environment.
 
 =over
 
diff --git a/statsbot b/statsbot
index 2545fc5..4c06d1a 100755
--- a/statsbot
+++ b/statsbot
@@ -96,6 +96,46 @@ not exist. Defaults to C</var/lib/statsbot/db>.
 
 =back
 
+=head1 ENVIRONMENT
+
+All options can be passed via the environment. If an option is passed both as an environment variable and as an argument, the argument takes priority.
+
+=over
+
+=item B<STATSBOT_DEBUG>=I<1>
+
+Equivalent to B<--debug>.
+
+=item B<STATSBOT_TICK>=I<60>
+
+Equivalent to B<--tick>=I<60>.
+
+=item B<STATSBOT_NICKNAME>=I<"timebot">
+
+Equivalent to B<--nickname>=I<"timebot">.
+
+=item B<STATSBOT_SERVER>=I<"irc.oftc.net">
+
+Equivalent to B<--server>=I<"irc.oftc.net">.
+
+=item B<STATSBOT_PORT>=I<6697>
+
+Equivalent to B<--port>=I<6697>.
+
+=item B<STATSBOT_SSL>=I<1>
+
+Equivalent to B<--ssl>.
+
+=item B<STATSBOT_CHANNELS>=I<"#mychan #otherchan">
+
+Equivalent to B<--channel>=I<#mychan> B<--channel>=I<#otherchan>.
+
+=item B<STATSBOT_DB>=I<"/path/to/some/file.sqlite">
+
+Equivalent to B<--db>=I<"/path/to/some/file.sqlite">.
+
+=back
+
 =head1 SEE ALSO
 
 L<App::Statsbot>
-- 
2.39.2