| package runconfig |
| |
| import ( |
| "strings" |
| |
| "github.com/docker/docker/pkg/nat" |
| ) |
| |
| // Merge merges two Config, the image container configuration (defaults values), |
| // and the user container configuration, either passed by the API or generated |
| // by the cli. |
| // It will mutate the specified user configuration (userConf) with the image |
| // configuration where the user configuration is incomplete. |
| func Merge(userConf, imageConf *Config) error { |
| if userConf.User == "" { |
| userConf.User = imageConf.User |
| } |
| 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.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 |
| break |
| } |
| } |
| if !found { |
| userConf.Env = append(userConf.Env, imageEnv) |
| } |
| } |
| } |
| |
| if userConf.Labels == nil { |
| userConf.Labels = map[string]string{} |
| } |
| if imageConf.Labels != nil { |
| for l := range userConf.Labels { |
| imageConf.Labels[l] = userConf.Labels[l] |
| } |
| userConf.Labels = imageConf.Labels |
| } |
| |
| if userConf.Entrypoint.Len() == 0 { |
| if userConf.Cmd.Len() == 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 |
| } |