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