80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
package runconfig
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import (
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"strings"
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"github.com/docker/go-connections/nat"
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)
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// Merge merges two Config, the image container configuration (defaults values),
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// and the user container configuration, either passed by the API or generated
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// by the cli.
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// It will mutate the specified user configuration (userConf) with the image
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// configuration where the user configuration is incomplete.
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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 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 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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break
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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.Labels == nil {
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userConf.Labels = map[string]string{}
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}
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if imageConf.Labels != nil {
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for l := range userConf.Labels {
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imageConf.Labels[l] = userConf.Labels[l]
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}
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userConf.Labels = imageConf.Labels
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}
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if userConf.Entrypoint.Len() == 0 {
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if userConf.Cmd.Len() == 0 {
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userConf.Cmd = imageConf.Cmd
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}
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if userConf.Entrypoint == nil {
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userConf.Entrypoint = imageConf.Entrypoint
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}
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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 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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