Readme draft

README.md

@@ -1 +1,65 @@
 # Confection
+
+Confection is a configuration manager plugin for Go projects.
+
+## Configuration
+
+First you need to add tags to fields of the config struct.
+
+* `json` — required for proper serialization
+* `title` — human readable field name (optional)
+* `attrs` — field attributes: `required`, `readonly`, `ignored`; separated by comma
+* `options` — list of supported values, separated by comma
+
+Required attributes will block `manager.RequireConfig()` call until field gets a value
+
+Ignored attributes are not displayed.
+
+Readonly attributes are displayed but disabled.
+
+You also need to pass an unmarshalling function as shown below.
+
+```go
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+
+	"github.com/localhots/confection"
+)
+
+type (
+	Config struct {
+		AppName     string `json:"app_name" attrs:"required" title:"Application Name"`
+		BuildNumber int    `json:"build_number" attrs:"readonly" title:"Build Number"`
+	}
+)
+
+func init() {
+	confection.SetupFlags()
+	flag.Parse()
+}
+
+func main() {
+	conf := Config{}
+	manager := confection.New(conf, func(b []byte) interface{} {
+		var newConf Config
+		if err := json.Unmarshal(b, &newConf); err != nil {
+			panic(err)
+		}
+		return newConf
+	})
+	manager.StartServer()
+	manager.RequireConfig()
+
+	fmt.Println("Ready to work!")
+}
+```
+
+[Full example](https://github.com/localhots/confection/blob/master/demo/demo.go)
+
+## Demo Screenshot
+
+<img src="https://raw.githubusercontent.com/localhots/confection/master/demo/demo.png" width="590">

manager.go

@@ -52,6 +52,9 @@ func (m *Manager) StartServer() {
 	srv.start()
 }
 
+func (m *Manager) RequireConfig() {
+}
+
 func (m *Manager) bootstrap() {
 	if m.file.isExist() {
 		b, err := m.file.read()