Add CircleCI plugin.

src/lib/Hydra/Plugin/CircleCINotification.pm

@@ -0,0 +1,44 @@
+package Hydra::Plugin::CircleCINotification;
+
+use strict;
+use parent 'Hydra::Plugin';
+use HTTP::Request;
+use LWP::UserAgent;
+use Hydra::Helper::CatalystUtils;
+use JSON;
+
+sub buildFinished {
+    my ($self, $build, $dependents) = @_;
+    my $cfg = $self->{config}->{circleci};
+    my @config = defined $cfg ? ref $cfg eq "ARRAY" ? @$cfg : ($cfg) : ();
+
+    # Figure out to which branches to send notification.
+    my %branches;
+    foreach my $b ($build, @{$dependents}) {
+        my $prevBuild = getPreviousBuild($b);
+        my $jobName = showJobName $b;
+
+        foreach my $branch (@config) {
+            my $force = $branch->{force};
+            next unless $jobName =~ /^$branch->{jobs}$/;
+
+            # If build is failed, don't trigger circleci
+            next if ! $force && $b->buildstatus != 0;
+
+            my $fullUrl = "https://circleci.com/api/v1.1/project/" . $branch->{vcstype} . "/" . $branch->{username} . "/" . $branch->{project} . "/tree/" . $branch->{branch} . "?circle-token=" . $branch->{token};
+            $branches{$fullUrl} = 1;
+        }
+    }
+
+    return if scalar keys %branches == 0;
+
+    # Trigger earch branch
+    my $ua = LWP::UserAgent->new();
+    foreach my $url (keys %branches) {
+        my $req = HTTP::Request->new('POST', $url);
+        $req->header('Content-Type' => 'application/json');
+        $ua->request($req);
+    }
+}
+
+1;