Add projects

backend/internal/config/plugin_path.go

@@ -0,0 +1,46 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const defaultPluginsDir = "plugins"
+
+// ResolvePluginsDir normalizes the plugin directory for consistent use throughout the app.
+// It expands a leading tilde (~) to the user's home directory and defaults empty values to plugins.
+func ResolvePluginsDir(pluginsDir string) (string, error) {
+	pluginsDir = strings.TrimSpace(pluginsDir)
+	if pluginsDir == "" {
+		pluginsDir = defaultPluginsDir
+	}
+	if strings.HasPrefix(pluginsDir, "~") {
+		homeDir, errUserHomeDir := os.UserHomeDir()
+		if errUserHomeDir != nil {
+			return "", fmt.Errorf("resolve plugins directory: %w", errUserHomeDir)
+		}
+		remainder := strings.TrimPrefix(pluginsDir, "~")
+		remainder = strings.TrimLeft(remainder, "/\\")
+		if remainder == "" {
+			return filepath.Clean(homeDir), nil
+		}
+		normalized := strings.ReplaceAll(remainder, "\\", "/")
+		return filepath.Clean(filepath.Join(homeDir, filepath.FromSlash(normalized))), nil
+	}
+	return filepath.Clean(pluginsDir), nil
+}
+
+// ResolvePluginsDir resolves and stores the effective plugin directory.
+func (cfg *Config) ResolvePluginsDir() error {
+	if cfg == nil {
+		return nil
+	}
+	pluginsDir, errResolvePluginsDir := ResolvePluginsDir(cfg.Plugins.Dir)
+	if errResolvePluginsDir != nil {
+		return errResolvePluginsDir
+	}
+	cfg.Plugins.Dir = pluginsDir
+	return nil
+}