move configuration handling code to the config package.

appcontext/appcontext.go

@@ -6,7 +6,6 @@ import (
 	"github.com/PlakarKorp/pkg"
 	"github.com/PlakarKorp/plakar/config"
 	"github.com/PlakarKorp/plakar/cookies"
-	"github.com/PlakarKorp/plakar/utils"
 )
 
 type AppContext struct {
@@ -97,7 +96,7 @@ func (c *AppContext) GetPkgManager() *pkg.Manager {
 }
 
 func (c *AppContext) ReloadConfig() error {
-	cfg, err := utils.LoadConfig(c.ConfigDir)
+	cfg, err := config.Load(c.ConfigDir)
 	if err != nil {
 		return err
 	}

config/load.go

@@ -0,0 +1,208 @@
+package config
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"go.yaml.in/yaml/v3"
+)
+
+const CONFIG_VERSION = "v1.0.0"
+
+type (
+	storesConfig struct {
+		Version string                       `yaml:"version"`
+		Default string                       `yaml:"default,omitempty"`
+		Stores  map[string]map[string]string `yaml:"stores"`
+	}
+
+	sourcesConfig struct {
+		Version string                       `yaml:"version"`
+		Sources map[string]map[string]string `yaml:"sources"`
+	}
+
+	destinationsConfig struct {
+		Version      string                       `yaml:"version"`
+		Destinations map[string]map[string]string `yaml:"destinations"`
+	}
+)
+
+func load(file string, dst any) error {
+	f, err := os.Open(file)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return err
+		}
+		return fmt.Errorf("failed to open file %s: %w", file, err)
+	}
+	defer f.Close()
+
+	info, err := f.Stat()
+	if err != nil {
+		return fmt.Errorf("failed to stat file %s: %w", file, err)
+	}
+	if info.Size() == 0 {
+		return nil
+	}
+
+	// try to load the new format
+	err = yaml.NewDecoder(f).Decode(dst)
+	var version string
+	switch t := dst.(type) {
+	case *storesConfig:
+		version = t.Version
+	case *destinationsConfig:
+		version = t.Version
+	case *sourcesConfig:
+		version = t.Version
+	default:
+		return fmt.Errorf("invalid configuration type %v", t)
+	}
+	if err == nil && version == CONFIG_VERSION {
+		return nil
+	}
+
+	// fallback to the previous format
+	_, err = f.Seek(0, io.SeekStart)
+	if err != nil {
+		return fmt.Errorf("failed to rewind config file: %w", err)
+	}
+
+	switch t := dst.(type) {
+	case *storesConfig:
+		err = yaml.NewDecoder(f).Decode(&t.Stores)
+		if err == nil {
+			for k, v := range t.Stores {
+				if _, ok := v[".isDefault"]; ok {
+					if t.Default != "" {
+						return fmt.Errorf("multiple default store")
+					}
+					t.Default = k
+					delete(v, ".isDefault")
+				}
+			}
+		}
+	case *destinationsConfig:
+		err = yaml.NewDecoder(f).Decode(&t.Destinations)
+	case *sourcesConfig:
+		err = yaml.NewDecoder(f).Decode(&t.Sources)
+	}
+	if err != nil {
+		return fmt.Errorf("failed to parse config file: %w", err)
+	}
+
+	return nil
+}
+
+func loadFallback(dir string) (*Config, error) {
+	// Load old config if found
+	oldpath := filepath.Join(dir, "plakar.yml")
+	cfg, err := LoadOldConfigIfExists(oldpath)
+	if err != nil {
+		return nil, fmt.Errorf("error reading file %s: %w", oldpath, err)
+	}
+
+	// Save the config in the new format right now
+	if err := Save(dir, cfg); err != nil {
+		return nil, fmt.Errorf("failed to update config file: %w", err)
+	}
+	// Do we want to remove the old file?
+	return cfg, nil
+}
+
+func Load(dir string) (*Config, error) {
+	sources := sourcesConfig{}
+	destinations := destinationsConfig{}
+	stores := storesConfig{}
+
+	err := load(filepath.Join(dir, "sources.yml"), &sources)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return loadFallback(dir)
+		}
+		return nil, err
+	}
+
+	err = load(filepath.Join(dir, "destinations.yml"), &destinations)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return loadFallback(dir)
+		}
+		return nil, err
+	}
+
+	err = load(filepath.Join(dir, "stores.yml"), &stores)
+	if err != nil && os.IsNotExist(err) {
+		// try to load former file
+		err = load(filepath.Join(dir, "klosets.yml"), &stores)
+	}
+	if err != nil {
+		if os.IsNotExist(err) {
+			return loadFallback(dir)
+		}
+		return nil, err
+	}
+
+	cfg := NewConfig()
+	cfg.Sources = sources.Sources
+	cfg.Destinations = destinations.Destinations
+	cfg.Repositories = stores.Stores
+	cfg.DefaultRepository = stores.Default
+
+	return cfg, nil
+}
+
+func save(file string, src any) error {
+	tmpFile, err := os.CreateTemp(filepath.Dir(file), "config.*.yml")
+	if err != nil {
+		return err
+	}
+
+	err = yaml.NewEncoder(tmpFile).Encode(src)
+	tmpFile.Close()
+
+	if err == nil {
+		err = os.Rename(tmpFile.Name(), file)
+	}
+
+	if err != nil {
+		os.Remove(tmpFile.Name())
+		return err
+	}
+
+	return nil
+}
+
+func Save(dir string, cfg *Config) error {
+	// Create the config directory if it doesn't exist
+	err := os.MkdirAll(dir, 0700)
+	if err != nil {
+		return err
+	}
+
+	err = save(filepath.Join(dir, "sources.yml"), sourcesConfig{
+		Version: CONFIG_VERSION,
+		Sources: cfg.Sources,
+	})
+	if err != nil {
+		return err
+	}
+	err = save(filepath.Join(dir, "destinations.yml"), destinationsConfig{
+		Version:      CONFIG_VERSION,
+		Destinations: cfg.Destinations,
+	})
+	if err != nil {
+		return err
+	}
+	err = save(filepath.Join(dir, "stores.yml"), storesConfig{
+		Version: CONFIG_VERSION,
+		Default: cfg.DefaultRepository,
+		Stores:  cfg.Repositories,
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}