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config.go
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/
config.go
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package dockerclient
import (
"encoding/json"
"strings"
)
// Entrypoint encapsulates the container entrypoint.
// It might be represented as a string or an array of strings.
// We need to override the json decoder to accept both options.
// The JSON decoder will fail if the api sends an string and
// we try to decode it into an array of string.
type Entrypoint struct {
parts []string
}
func (e *Entrypoint) MarshalJSON() ([]byte, error) {
if e == nil {
return []byte{}, nil
}
return json.Marshal(e.Slice())
}
// UnmarshalJSON decoded the entrypoint whether it's a string or an array of strings.
func (e *Entrypoint) UnmarshalJSON(b []byte) error {
if len(b) == 0 {
return nil
}
p := make([]string, 0, 1)
if err := json.Unmarshal(b, &p); err != nil {
var s string
if err := json.Unmarshal(b, &s); err != nil {
return err
}
p = append(p, s)
}
e.parts = p
return nil
}
func (e *Entrypoint) Len() int {
if e == nil {
return 0
}
return len(e.parts)
}
func (e *Entrypoint) Slice() []string {
if e == nil {
return nil
}
return e.parts
}
func NewEntrypoint(parts ...string) *Entrypoint {
return &Entrypoint{parts}
}
type Command struct {
parts []string
}
func (e *Command) ToString() string {
return strings.Join(e.parts, " ")
}
func (e *Command) MarshalJSON() ([]byte, error) {
if e == nil {
return []byte{}, nil
}
return json.Marshal(e.Slice())
}
// UnmarshalJSON decoded the entrypoint whether it's a string or an array of strings.
func (e *Command) UnmarshalJSON(b []byte) error {
if len(b) == 0 {
return nil
}
p := make([]string, 0, 1)
if err := json.Unmarshal(b, &p); err != nil {
var s string
if err := json.Unmarshal(b, &s); err != nil {
return err
}
p = append(p, s)
}
e.parts = p
return nil
}
func (e *Command) Len() int {
if e == nil {
return 0
}
return len(e.parts)
}
func (e *Command) Slice() []string {
if e == nil {
return nil
}
return e.parts
}
func NewCommand(parts ...string) *Command {
return &Command{parts}
}