From c5d1c4861022ee6d369c493548ce2325b0c393bd Mon Sep 17 00:00:00 2001
From: Dave McLain <dave.mclain@tabbedout.com>
Date: Thu, 12 May 2016 13:51:22 -0500
Subject: [PATCH] Add support for overriding the icon_url slack parameter

---
 config/notifiers.go   | 2 ++
 notify/impl.go        | 2 ++
 template/default.tmpl | 1 +
 3 files changed, 5 insertions(+)

diff --git a/config/notifiers.go b/config/notifiers.go
index 6ff8b802..c3a3f4ec 100644
--- a/config/notifiers.go
+++ b/config/notifiers.go
@@ -65,6 +65,7 @@ var (
 		Title:     `{{ template "slack.default.title" . }}`,
 		TitleLink: `{{ template "slack.default.titlelink" . }}`,
 		IconEmoji: `{{ template "slack.default.iconemoji" . }}`,
+		IconURL:   `{{ template "slack.default.iconurl" . }}`,
 		Pretext:   `{{ template "slack.default.pretext" . }}`,
 		Text:      `{{ template "slack.default.text" . }}`,
 		Fallback:  `{{ template "slack.default.fallback" . }}`,
@@ -204,6 +205,7 @@ type SlackConfig struct {
 	Text      string `yaml:"text"`
 	Fallback  string `yaml:"fallback"`
 	IconEmoji string `yaml:"icon_emoji"`
+	IconURL   string `yaml:"icon_url"`
 
 	// Catches all undefined fields and must be empty after parsing.
 	XXX map[string]interface{} `yaml:",inline"`
diff --git a/notify/impl.go b/notify/impl.go
index a4eadfe4..ed660e16 100644
--- a/notify/impl.go
+++ b/notify/impl.go
@@ -463,6 +463,7 @@ type slackReq struct {
 	Channel     string            `json:"channel,omitempty"`
 	Username    string            `json:"username,omitempty"`
 	IconEmoji   string            `json:"icon_emoji,omitempty"`
+	IconURL     string            `json:"icon_url,omitempty"`
 	Attachments []slackAttachment `json:"attachments"`
 }
 
@@ -506,6 +507,7 @@ func (n *Slack) Notify(ctx context.Context, as ...*types.Alert) error {
 		Channel:     tmplText(n.conf.Channel),
 		Username:    tmplText(n.conf.Username),
 		IconEmoji:   tmplText(n.conf.IconEmoji),
+		IconURL:     tmplText(n.conf.IconURL),
 		Attachments: []slackAttachment{*attachment},
 	}
 	if err != nil {
diff --git a/template/default.tmpl b/template/default.tmpl
index 6f811054..b6d2246e 100644
--- a/template/default.tmpl
+++ b/template/default.tmpl
@@ -18,6 +18,7 @@
 {{ define "slack.default.pretext" }}{{ end }}
 {{ define "slack.default.titlelink" }}{{ template "__alertmanagerURL" . }}{{ end }}
 {{ define "slack.default.iconemoji" }}{{ end }}
+{{ define "slack.default.iconurl" }}{{ end }}
 {{ define "slack.default.text" }}{{ end }}