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package dockercfg
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
)
// UserHomeConfigPath returns the path to the docker config in the current user's home dir.
func UserHomeConfigPath() (string, error) {
home, err := os.UserHomeDir()
if err != nil {
return "", fmt.Errorf("user home dir: %w", err)
}
return filepath.Join(home, ".docker", "config.json"), nil
}
// ConfigPath returns the path to the docker cli config.
//
// It will either use the DOCKER_CONFIG env var if set, or the value from [UserHomeConfigPath]
// DOCKER_CONFIG would be the dir path where `config.json` is stored, this returns the path to config.json.
func ConfigPath() (string, error) {
if p := os.Getenv("DOCKER_CONFIG"); p != "" {
return filepath.Join(p, "config.json"), nil
}
return UserHomeConfigPath()
}
// LoadDefaultConfig loads the docker cli config from the path returned from [ConfigPath].
func LoadDefaultConfig() (Config, error) {
var cfg Config
p, err := ConfigPath()
if err != nil {
return cfg, fmt.Errorf("config path: %w", err)
}
return cfg, FromFile(p, &cfg)
}
// FromFile loads config from the specified path into cfg.
func FromFile(configPath string, cfg *Config) error {
f, err := os.Open(configPath)
if err != nil {
return fmt.Errorf("open config: %w", err)
}
defer f.Close()
if err = json.NewDecoder(f).Decode(&cfg); err != nil {
return fmt.Errorf("decode config: %w", err)
}
return nil
}
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