toml support

Gopkg.toml

@@ -25,3 +25,7 @@
 [prune]
   go-tests = true
   unused-packages = true
+
+[[constraint]]
+  name = "github.com/BurntSushi/toml"
+  version = "0.3.0"

README.md

@@ -11,6 +11,7 @@ Confita is a library that loads configuration from multiple backends and stores
 - Environment variables
 - JSON files
 - Yaml files
+- Toml files
 - Command line flags
 - [etcd](https://github.com/coreos/etcd)
 - [Consul](https://www.consul.io/)

backend/file/file.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/BurntSushi/toml"
 	"github.com/go-yaml/yaml"
 	"github.com/pkg/errors"
 )
@@ -47,6 +48,8 @@ func (b *Backend) Unmarshal(ctx context.Context, to interface{}) error {
 		fallthrough
 	case ".yaml":
 		err = yaml.NewDecoder(f).Decode(to)
+	case ".toml":
+		_, err = toml.DecodeReader(f, to)
 	default:
 		err = errors.Errorf("unsupported extension \"%s\"", ext)
 	}

backend/file/file_test.go

@@ -72,6 +72,17 @@ func TestFileBackend(t *testing.T) {
 		testLoad(t, path)
 	})
 
+	t.Run("TOML", func(t *testing.T) {
+		path, cleanup := createTempFile(t, "config.toml",
+			`name = "some name"
+age = 10
+timeout = 10
+`)
+		defer cleanup()
+
+		testLoad(t, path)
+	})
+
 	t.Run("Unsupported extension", func(t *testing.T) {
 		path, cleanup := createTempFile(t, "config.xml", `{
 			"name": "some name"