first commit

config.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/BurntSushi/toml"
+)
+
+type Config struct {
+	Listen string `toml:"listen"`
+	Root   string `toml:"root"`
+	Hidden bool   `toml:"hidden"`
+	Footer string `toml:"footer"`
+}
+
+func loadConfig(path string) (*Config, error) {
+	b, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	cfg := &Config{}
+	if err := toml.Unmarshal(b, cfg); err != nil {
+		return nil, fmt.Errorf("%s: %w", path, err)
+	}
+	if cfg.Root == "" {
+		return nil, errors.New(`config: "root" is required`)
+	}
+	root, err := filepath.Abs(cfg.Root)
+	if err != nil {
+		return nil, err
+	}
+	if info, err := os.Stat(root); err != nil || !info.IsDir() {
+		return nil, fmt.Errorf("config: root %q is not a directory", root)
+	}
+	cfg.Root = root
+	if cfg.Listen == "" {
+		cfg.Listen = ":8080"
+	}
+	if cfg.Footer == "" {
+		cfg.Footer = "kaidan 1.0"
+	}
+	return cfg, nil
+}