// 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
}
// ToEnv creates a string's slice containing child container informations in
// the form of environment variables which will be later exported on container
// startup.
func (l *Link) ToEnv() []string {
env := []string{}
_, n := path.Split(l.Name)
alias := strings.Replace(strings.ToUpper(n), "-", "_", -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
}