DockerCLI/opts/config.go

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package opts
import (
"encoding/csv"
"fmt"
"os"
"strconv"
"strings"
swarmtypes "github.com/docker/docker/api/types/swarm"
)
// ConfigOpt is a Value type for parsing configs
type ConfigOpt struct {
values []*swarmtypes.ConfigReference
}
// Set a new config value
func (o *ConfigOpt) Set(value string) error {
csvReader := csv.NewReader(strings.NewReader(value))
fields, err := csvReader.Read()
if err != nil {
return err
}
options := &swarmtypes.ConfigReference{
File: &swarmtypes.ConfigReferenceFileTarget{
UID: "0",
GID: "0",
Mode: 0o444,
},
}
// support a simple syntax of --config foo
if len(fields) == 1 && !strings.Contains(fields[0], "=") {
options.File.Name = fields[0]
options.ConfigName = fields[0]
o.values = append(o.values, options)
return nil
}
for _, field := range fields {
key, val, ok := strings.Cut(field, "=")
if !ok || key == "" {
return fmt.Errorf("invalid field '%s' must be a key=value pair", field)
}
// TODO(thaJeztah): these options should not be case-insensitive.
switch strings.ToLower(key) {
case "source", "src":
options.ConfigName = val
case "target":
options.File.Name = val
case "uid":
options.File.UID = val
case "gid":
options.File.GID = val
case "mode":
m, err := strconv.ParseUint(val, 0, 32)
if err != nil {
return fmt.Errorf("invalid mode specified: %v", err)
}
options.File.Mode = os.FileMode(m)
default:
return fmt.Errorf("invalid field in config request: %s", key)
}
}
if options.ConfigName == "" {
return fmt.Errorf("source is required")
}
if options.File.Name == "" {
options.File.Name = options.ConfigName
}
o.values = append(o.values, options)
return nil
}
// Type returns the type of this option
func (o *ConfigOpt) Type() string {
return "config"
}
// String returns a string repr of this option
func (o *ConfigOpt) String() string {
configs := []string{}
for _, config := range o.values {
repr := fmt.Sprintf("%s -> %s", config.ConfigName, config.File.Name)
configs = append(configs, repr)
}
return strings.Join(configs, ", ")
}
// Value returns the config requests
func (o *ConfigOpt) Value() []*swarmtypes.ConfigReference {
return o.values
}