Merge pull request #80 from jessecarbon/master

Add support for loading environment variables from optional file

service_systemd_linux.go

@@ -168,6 +168,7 @@ ExecStart={{.Path|cmdEscape}}{{range .Arguments}} {{.|cmd}}{{end}}
 {{if .PIDFile}}PIDFile={{.PIDFile|cmd}}{{end}}
 Restart=always
 RestartSec=120
+EnvironmentFile=-/etc/sysconfig/{{.Name}}
 
 [Install]
 WantedBy=multi-user.target

service_sysv_linux.go

@@ -176,6 +176,8 @@ pid_file="/var/run/$name.pid"
 stdout_log="/var/log/$name.log"
 stderr_log="/var/log/$name.err"
 
+[ -e /etc/sysconfig/$name ] && . /etc/sysconfig/$name
+
 get_pid() {
     cat "$pid_file"
 }