func (l *Link) ToEnv() []string { env := []string{} alias := strings.Replace(strings.ToUpper(l.Alias()), "-", "_", -1) if p := l.getDefaultPort(); p != nil { env = append(env, fmt.Sprintf("%s_PORT=%s://%s:%s", alias, p.Proto(), l.ChildIP, p.Port())) } //sort the ports so that we can bulk the continuous ports together nat.Sort(l.Ports, func(ip, jp nat.Port) bool { // If the two ports have the same number, tcp takes priority // Sort in desc order return ip.Int() < jp.Int() || (ip.Int() == jp.Int() && strings.ToLower(ip.Proto()) == "tcp") }) for i := 0; i < len(l.Ports); { p := l.Ports[i] j := nextContiguous(l.Ports, p.Int(), i) if j > i+1 { env = append(env, fmt.Sprintf("%s_PORT_%s_%s_START=%s://%s:%s", alias, p.Port(), strings.ToUpper(p.Proto()), p.Proto(), l.ChildIP, p.Port())) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_ADDR=%s", alias, p.Port(), strings.ToUpper(p.Proto()), l.ChildIP)) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_PROTO=%s", alias, p.Port(), strings.ToUpper(p.Proto()), p.Proto())) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_PORT_START=%s", alias, p.Port(), strings.ToUpper(p.Proto()), p.Port())) q := l.Ports[j] env = append(env, fmt.Sprintf("%s_PORT_%s_%s_END=%s://%s:%s", alias, p.Port(), strings.ToUpper(q.Proto()), q.Proto(), l.ChildIP, q.Port())) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_PORT_END=%s", alias, p.Port(), strings.ToUpper(q.Proto()), q.Port())) i = j + 1 continue } else { i++ } } for _, p := range l.Ports { env = append(env, fmt.Sprintf("%s_PORT_%s_%s=%s://%s:%s", alias, p.Port(), strings.ToUpper(p.Proto()), p.Proto(), l.ChildIP, p.Port())) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_ADDR=%s", alias, p.Port(), strings.ToUpper(p.Proto()), l.ChildIP)) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_PORT=%s", alias, p.Port(), strings.ToUpper(p.Proto()), p.Port())) env = append(env, fmt.Sprintf("%s_PORT_%s_%s_PROTO=%s", alias, p.Port(), strings.ToUpper(p.Proto()), p.Proto())) } // Load the linked container's name into the environment env = append(env, fmt.Sprintf("%s_NAME=%s", alias, l.Name)) if l.ChildEnvironment != nil { for _, v := range l.ChildEnvironment { parts := strings.SplitN(v, "=", 2) if len(parts) < 2 { continue } // Ignore a few variables that are added during docker build (and not really relevant to linked containers) if parts[0] == "HOME" || parts[0] == "PATH" { continue } env = append(env, fmt.Sprintf("%s_ENV_%s=%s", alias, parts[0], parts[1])) } } return env }
// Default port rules func (l *Link) getDefaultPort() *nat.Port { var p nat.Port i := len(l.Ports) if i == 0 { return nil } else if i > 1 { nat.Sort(l.Ports, func(ip, jp nat.Port) bool { // If the two ports have the same number, tcp takes priority // Sort in desc order return ip.Int() < jp.Int() || (ip.Int() == jp.Int() && strings.ToLower(ip.Proto()) == "tcp") }) } p = l.Ports[0] return &p }