174 lines
4.1 KiB
Go
174 lines
4.1 KiB
Go
package docker
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import (
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"fmt"
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"strings"
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)
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// Compare two Config struct. Do not compare the "Image" nor "Hostname" fields
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// If OpenStdin is set, then it differs
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func CompareConfig(a, b *Config) bool {
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if a == nil || b == nil ||
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a.OpenStdin || b.OpenStdin {
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return false
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}
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if a.AttachStdout != b.AttachStdout ||
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a.AttachStderr != b.AttachStderr ||
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a.User != b.User ||
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a.Memory != b.Memory ||
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a.MemorySwap != b.MemorySwap ||
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a.CpuShares != b.CpuShares ||
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a.OpenStdin != b.OpenStdin ||
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a.Tty != b.Tty ||
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a.VolumesFrom != b.VolumesFrom {
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return false
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}
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if len(a.Cmd) != len(b.Cmd) ||
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len(a.Dns) != len(b.Dns) ||
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len(a.Env) != len(b.Env) ||
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len(a.PortSpecs) != len(b.PortSpecs) ||
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len(a.Entrypoint) != len(b.Entrypoint) ||
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len(a.Volumes) != len(b.Volumes) {
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return false
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}
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for i := 0; i < len(a.Cmd); i++ {
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if a.Cmd[i] != b.Cmd[i] {
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return false
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}
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}
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for i := 0; i < len(a.Dns); i++ {
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if a.Dns[i] != b.Dns[i] {
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return false
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}
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}
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for i := 0; i < len(a.Env); i++ {
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if a.Env[i] != b.Env[i] {
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return false
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}
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}
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for i := 0; i < len(a.PortSpecs); i++ {
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if a.PortSpecs[i] != b.PortSpecs[i] {
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return false
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}
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}
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for i := 0; i < len(a.Entrypoint); i++ {
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if a.Entrypoint[i] != b.Entrypoint[i] {
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return false
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}
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}
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for key := range a.Volumes {
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if _, exists := b.Volumes[key]; !exists {
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return false
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}
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}
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return true
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}
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func MergeConfig(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.PortSpecs == nil || len(userConf.PortSpecs) == 0 {
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userConf.PortSpecs = imageConf.PortSpecs
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} else {
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for _, imagePortSpec := range imageConf.PortSpecs {
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found := false
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imageNat, _ := parseNat(imagePortSpec)
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for _, userPortSpec := range userConf.PortSpecs {
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userNat, err := parseNat(userPortSpec)
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if err != nil {
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return err
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}
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if imageNat.Proto == userNat.Proto && imageNat.Backend == userNat.Backend {
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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.PortSpecs = append(userConf.PortSpecs, imagePortSpec)
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}
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}
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}
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if !userConf.Tty {
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userConf.Tty = imageConf.Tty
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}
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if !userConf.OpenStdin {
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userConf.OpenStdin = imageConf.OpenStdin
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}
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if !userConf.StdinOnce {
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userConf.StdinOnce = imageConf.StdinOnce
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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.Dns == nil || len(userConf.Dns) == 0 {
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userConf.Dns = imageConf.Dns
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} else {
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//duplicates aren't an issue here
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userConf.Dns = append(userConf.Dns, imageConf.Dns...)
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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.VolumesFrom == "" {
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userConf.VolumesFrom = imageConf.VolumesFrom
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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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func parseLxcConfOpts(opts ListOpts) ([]KeyValuePair, error) {
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out := make([]KeyValuePair, len(opts))
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for i, o := range opts {
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k, v, err := parseLxcOpt(o)
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if err != nil {
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return nil, err
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}
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out[i] = KeyValuePair{Key: k, Value: v}
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}
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return out, nil
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}
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func parseLxcOpt(opt string) (string, string, error) {
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parts := strings.SplitN(opt, "=", 2)
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if len(parts) != 2 {
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return "", "", fmt.Errorf("Unable to parse lxc conf option: %s", opt)
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}
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return strings.TrimSpace(parts[0]), strings.TrimSpace(parts[1]), nil
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}
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