Add a TOML configuration file

internal/config/config.go

@@ -0,0 +1,32 @@
+package config
+
+import (
+	"path/filepath"
+
+	"github.com/BurntSushi/toml"
+)
+
+type WH40K struct {
+	DataDir     string   `toml:"data_dir"`
+	VideoPlayer []string `toml:"video_player"`
+}
+
+type Config struct {
+	WH40K `toml:"wh40k"`
+}
+
+func Load(filename string) (*Config, error) {
+	var out Config
+
+	_, err := toml.DecodeFile(filename, &out)
+	if err != nil {
+		return nil, err
+	}
+
+	return &out, err
+}
+
+// TODO: case-insensitive lookup
+func (c *Config) DataFile(path string) string {
+	return filepath.Join(c.DataDir, path)
+}