From 173058afdf9592a3df17d9b5066840fd96b36e4d Mon Sep 17 00:00:00 2001
From: Daniel Fuentes <daniel.richard.fuentes@gmail.com>
Date: Sat, 9 May 2015 17:37:59 -0700
Subject: [PATCH] Adds a .Env function on syslog messages:

- This allows you to use docker container environment variables in the
  templates for things like SYSLOG_TAG
---
 adapters/syslog/syslog.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/adapters/syslog/syslog.go b/adapters/syslog/syslog.go
index 95e03d1d..ce7ec7dd 100644
--- a/adapters/syslog/syslog.go
+++ b/adapters/syslog/syslog.go
@@ -8,6 +8,7 @@ import (
 	"log/syslog"
 	"net"
 	"os"
+	"strings"
 	"text/template"
 	"time"
 
@@ -216,3 +217,13 @@ func (m *SyslogMessage) Timestamp() string {
 func (m *SyslogMessage) ContainerName() string {
 	return m.Message.Container.Name[1:]
 }
+
+func (m *SyslogMessage) Env(key string) string {
+	envValues := m.Message.Container.Config.Env
+	for _, env := range envValues {
+		if strings.HasPrefix(env, key+"=") {
+			return env[len(key)+1:]
+		}
+	}
+	return ""
+}