snapshot of https://github.com/ory/kratos.git (master, 2026-09-15; blobs > 131072B omitted)

oryx/configx/koanf_file.go

@@ -0,0 +1,90 @@
+// Copyright © 2023 Ory Corp
+// SPDX-License-Identifier: Apache-2.0
+
+package configx
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/knadh/koanf/parsers/json"
+	"github.com/knadh/koanf/parsers/toml"
+	"github.com/knadh/koanf/parsers/yaml"
+	"github.com/knadh/koanf/v2"
+
+	"github.com/pkg/errors"
+
+	"github.com/ory/x/watcherx"
+)
+
+// KoanfFile implements a KoanfFile provider.
+type KoanfFile struct {
+	subKey string
+	path   string
+	parser koanf.Parser
+}
+
+// NewKoanfFile returns a file provider.
+func NewKoanfFile(path string) (*KoanfFile, error) {
+	return NewKoanfFileSubKey(path, "")
+}
+
+func NewKoanfFileSubKey(path, subKey string) (*KoanfFile, error) {
+	kf := &KoanfFile{
+		path:   filepath.Clean(path),
+		subKey: subKey,
+	}
+
+	switch e := filepath.Ext(path); e {
+	case ".toml":
+		kf.parser = toml.Parser()
+	case ".json":
+		kf.parser = json.Parser()
+	case ".yaml", ".yml":
+		kf.parser = yaml.Parser()
+	default:
+		return nil, errors.Errorf("unknown config file extension: %s", e)
+	}
+
+	return kf, nil
+}
+
+// ReadBytes is not supported by KoanfFile.
+func (f *KoanfFile) ReadBytes() ([]byte, error) {
+	return nil, errors.New("file provider does not support this method")
+}
+
+// Read reads the file and returns the parsed configuration.
+func (f *KoanfFile) Read() (map[string]interface{}, error) {
+	//#nosec G304 -- false positive
+	fc, err := os.ReadFile(f.path)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	v, err := f.parser.Unmarshal(fc)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	if f.subKey == "" {
+		return v, nil
+	}
+
+	path := strings.Split(f.subKey, Delimiter)
+	for i := range path {
+		v = map[string]interface{}{
+			path[len(path)-1-i]: v,
+		}
+	}
+
+	return v, nil
+}
+
+// WatchChannel watches the file and triggers a callback when it changes. It is a
+// blocking function that internally spawns a goroutine to watch for changes.
+func (f *KoanfFile) WatchChannel(ctx context.Context, c watcherx.EventChannel) (watcherx.Watcher, error) {
+	return watcherx.WatchFile(ctx, f.path, c)
+}