package runconfig import ( "strings" log "github.com/Sirupsen/logrus" "github.com/docker/docker/nat" ) func Merge(userConf, imageConf *Config) error { if userConf.User == "" { userConf.User = imageConf.User } if userConf.Memory == 0 { userConf.Memory = imageConf.Memory } if userConf.MemorySwap == 0 { userConf.MemorySwap = imageConf.MemorySwap } if userConf.CpuShares == 0 { userConf.CpuShares = imageConf.CpuShares } if len(userConf.ExposedPorts) == 0 { userConf.ExposedPorts = imageConf.ExposedPorts } else if imageConf.ExposedPorts != nil { if userConf.ExposedPorts == nil { userConf.ExposedPorts = make(nat.PortSet) } for port := range imageConf.ExposedPorts { if _, exists := userConf.ExposedPorts[port]; !exists { userConf.ExposedPorts[port] = struct{}{} } } } if len(userConf.PortSpecs) > 0 { if userConf.ExposedPorts == nil { userConf.ExposedPorts = make(nat.PortSet) } ports, _, err := nat.ParsePortSpecs(userConf.PortSpecs) if err != nil { return err } for port := range ports { if _, exists := userConf.ExposedPorts[port]; !exists { userConf.ExposedPorts[port] = struct{}{} } } userConf.PortSpecs = nil } if len(imageConf.PortSpecs) > 0 { // FIXME: I think we can safely remove this. Leaving it for now for the sake of reverse-compat paranoia. log.Debugf("Migrating image port specs to containter: %s", strings.Join(imageConf.PortSpecs, ", ")) if userConf.ExposedPorts == nil { userConf.ExposedPorts = make(nat.PortSet) } ports, _, err := nat.ParsePortSpecs(imageConf.PortSpecs) if err != nil { return err } for port := range ports { if _, exists := userConf.ExposedPorts[port]; !exists { userConf.ExposedPorts[port] = struct{}{} } } } if len(userConf.Env) == 0 { userConf.Env = imageConf.Env } else { for _, imageEnv := range imageConf.Env { found := false imageEnvKey := strings.Split(imageEnv, "=")[0] for _, userEnv := range userConf.Env { userEnvKey := strings.Split(userEnv, "=")[0] if imageEnvKey == userEnvKey { found = true } } if !found { userConf.Env = append(userConf.Env, imageEnv) } } } if len(userConf.Entrypoint) == 0 { if len(userConf.Cmd) == 0 { userConf.Cmd = imageConf.Cmd } if userConf.Entrypoint == nil { userConf.Entrypoint = imageConf.Entrypoint } } if userConf.WorkingDir == "" { userConf.WorkingDir = imageConf.WorkingDir } if len(userConf.Volumes) == 0 { userConf.Volumes = imageConf.Volumes } else { for k, v := range imageConf.Volumes { userConf.Volumes[k] = v } } return nil }