Merge pull request 'add providers interface' (#43) from providers into master

Reviewed-on: #43

.gitea/workflows/dasel.yml

@@ -0,0 +1,38 @@
+name: Go Action 
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - 'provider/dasel/**'
+      - '.gitea/workflows/dasel.yml'
+  pull_request:
+    paths:
+      - 'provider/dasel/**'
+      - '.gitea/workflows/dasel.yml'
+
+jobs:
+  goaction:
+    runs-on: ubuntu-latest # Use a Gitea Actions runner label
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4 # Action to clone the repo
+
+      - name: Set up Go
+        uses: actions/setup-go@v5 # Action to install a specific Go version
+        with:
+          go-version: '1.25.5' # Specify your required Go version
+      
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@v8 # Use the golangci-lint action
+        with:
+          version: v2.7.2 # Specify the linter version
+          # Optional: additional arguments
+          args: --verbose
+          working-directory: ./provider/dasel 
+
+      - name: Run go test
+        run: go test ./...
+        working-directory: ./provider/dasel
+

.gitea/workflows/goaction.yml

@@ -18,6 +18,9 @@ on:
       - '.gitea/workflows/vault.yml'
       - 'provider/yaml/**'
       - '.gitea/workflows/yaml.yml'
+      - 'provider/dasel/**'
+      - '.gitea/workflows/dasel.yml'
+
 
 
 jobs:

client.go

@@ -6,6 +6,8 @@ import (
 	"fmt"
 )
 
+var _ Providers = (*Client)(nil)
+
 func Must(providers ...any) *Client {
 	client, err := New(providers...)
 	if err != nil {
@@ -18,17 +20,28 @@ func Must(providers ...any) *Client {
 func New(providers ...any) (*Client, error) {
 	client := &Client{
 		providers: make([]Provider, len(providers)),
+		name:      make(map[string]int),
+		chain:     make([]Providers, 0, len(providers)),
 	}
 
 	for idx, prov := range providers {
+		var name string
+
 		switch current := prov.(type) {
 		case Provider:
 			client.providers[idx] = current
+			name = current.Name()
 		case Factory:
 			client.providers[idx] = WrapFactory(current, client)
+			name = current.Name()
 		default:
 			return nil, fmt.Errorf("provier[%d]: %w %T", idx, ErrUnknowType, prov)
 		}
+
+		client.name[name] = idx
+		if current, ok := prov.(Providers); ok {
+			client.chain = append(client.chain, current)
+		}
 	}
 
 	return client, nil
@@ -36,6 +49,8 @@ func New(providers ...any) (*Client, error) {
 
 type Client struct {
 	providers []Provider
+	name      map[string]int
+	chain     []Providers
 }
 
 func (c *Client) Name() string {
@@ -97,3 +112,30 @@ func (c *Client) Bind(ctx context.Context, data Variables) error {
 
 	return nil
 }
+
+func (c *Client) Provider(name string) (Provider, error) {
+	if idx, ok := c.name[name]; ok {
+		return c.providers[idx], nil
+	}
+
+	for _, prov := range c.chain {
+		if cprov, err := prov.Provider(name); err == nil {
+			return cprov, nil
+		}
+	}
+
+	return nil, fmt.Errorf("provider[%v]:%w", c.Name(), ErrNotFound)
+}
+
+func (c *Client) Names() []string {
+	names := make([]string, 0, len(c.providers))
+	for name := range c.name {
+		names = append(names, name)
+	}
+
+	for _, prov := range c.chain {
+		names = append(names, prov.Names()...)
+	}
+
+	return names
+}

client_example_test.go

@@ -11,6 +11,7 @@ import (
 	"gitoa.ru/go-4devs/config"
 	"gitoa.ru/go-4devs/config/provider/arg"
 	"gitoa.ru/go-4devs/config/provider/env"
+	"gitoa.ru/go-4devs/config/provider/factory"
 	"gitoa.ru/go-4devs/config/provider/watcher"
 	"gitoa.ru/go-4devs/config/test"
 )
@@ -127,7 +128,7 @@ func ExampleClient_Value_factory() {
 
 	config, err := config.New(
 		arg.New(),
-		config.Factory(func(ctx context.Context, cfg config.Provider) (config.Provider, error) {
+		factory.New("factory:env", func(ctx context.Context, cfg config.Provider) (config.Provider, error) {
 			val, err := cfg.Value(ctx, "env")
 			if err != nil {
 				return nil, fmt.Errorf("failed read config file:%w", err)

cmd/config/main.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"context"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"gitoa.ru/go-4devs/config/definition/generate/command"
+	"gitoa.ru/go-4devs/console"
+)
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	ch := make(chan os.Signal, 1)
+	defer close(ch)
+
+	signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		<-ch
+		cancel()
+	}()
+
+	console.
+		New().
+		Add(
+			command.Command(),
+		).
+		Execute(ctx)
+}

definition/defenition.go

@@ -2,15 +2,21 @@ package definition
 
 import (
 	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/param"
 )
 
+var _ config.Options = (*Definition)(nil)
+
 func New(opts ...config.Option) *Definition {
 	return &Definition{
 		options: opts,
+		Params:  param.New(),
 	}
 }
 
 type Definition struct {
+	param.Params
+
 	options []config.Option
 }
 
@@ -21,3 +27,14 @@ func (d *Definition) Add(opts ...config.Option) {
 func (d *Definition) Options() []config.Option {
 	return d.options
 }
+
+func (d *Definition) With(params param.Params) *Definition {
+	def := &Definition{
+		options: make([]config.Option, len(d.options)),
+		Params:  param.Chain(params, d.Params),
+	}
+
+	copy(def.options, d.options)
+
+	return def
+}

definition/generate/bootstrap/bootstrap.go

@@ -16,14 +16,13 @@ var tpls embed.FS
 
 type Boot struct {
 	Config
+	*pkg.Packages
 
-	imp       *pkg.Imports
 	Configure []string
-	OutName   string
 }
 
-func (b Boot) Imports() []pkg.Import {
-	return b.imp.Imports()
+func (b Boot) Pkg() string {
+	return pkg.Pkg(b.FullPkg())
 }
 
 type Config interface {
@@ -33,13 +32,12 @@ type Config interface {
 	Prefix() string
 	Suffix() string
 	FullPkg() string
-	Pkg() string
 }
 
 func Bootstrap(ctx context.Context, cfg Config) (string, error) {
 	fInfo, err := os.Stat(cfg.File())
 	if err != nil {
-		return "", fmt.Errorf("stat:%w", err)
+		return "", fmt.Errorf("stat[%v]:%w", cfg.File(), err)
 	}
 
 	pkgPath, err := pkg.ByPath(ctx, cfg.File(), fInfo.IsDir())
@@ -61,17 +59,19 @@ func Bootstrap(ctx context.Context, cfg Config) (string, error) {
 		Adds(
 			"context",
 			"gitoa.ru/go-4devs/config/definition",
+			"gitoa.ru/go-4devs/config",
+			"gitoa.ru/go-4devs/config/definition/generate/view",
+			"gitoa.ru/go-4devs/config/param",
 			"gitoa.ru/go-4devs/config/definition/generate",
 			"os",
+			"io",
 			"fmt",
-			"go/format",
 			pkgPath,
 		)
 
 	data := Boot{
-		imp:       imports,
+		Packages:  imports,
 		Configure: cfg.Methods(),
-		OutName:   fInfo.Name()[0:len(fInfo.Name())-3] + "_config.go",
 		Config:    cfg,
 	}
 

definition/generate/bootstrap/bootstrap.go.tpl

@@ -10,50 +10,34 @@ import (
 )
 
 func main() {
-	if err := run(); err != nil {
+	if err := run(os.Stdout); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}
 }
 
-func run() error {
+func run(f io.Writer) error {
 	ctx := context.Background()
 
-	f, err := os.Create("{{.OutName}}")
-	if err != nil {
-		return err
-	}
-
-	defs:=make([]generate.Input,0)
+	defs:=make([]config.Options,0)
 {{ range .Configure }} 
-	def{{.}} := definition.New()
+	params{{.}} := param.New(
+	{{- if $.SkipContext }}view.WithSkipContext,{{ end }}
+	view.WithStructName("{{$.Prefix}}_{{.}}_{{$.Suffix}}"),
+	view.WithStructPrefix("{{$.Prefix}}"),
+  view.WithStructSuffix("{{$.Suffix}}"),
+	)
+
+	def{{.}} := definition.New().With(params{{.}})
 	if err := {{$.Pkg}}.{{.}}(ctx, def{{.}}); err != nil {
 		return err
 	}
-	defs = append(defs,generate.NewInput("{{.}}",def{{.}}))
+	defs = append(defs,def{{.}})
 {{ end }}
 
-	opts := make([]generate.Option,0)
-	{{ if .SkipContext }}opts = append(opts, generate.WithSkipContext){{ end }}
-	opts = append(opts, 
-		generate.WithPrefix("{{.Prefix}}"),
-		generate.WithSuffix("{{.Suffix}}"),
-		generate.WithFullPkg("{{.FullPkg}}"),
-	)
-
-	if gerr := generate.Run(ctx,generate.NewConfig(opts...),f, defs...);gerr != nil {
+	if gerr := generate.Run(ctx,"{{.FullPkg}}",f, defs...);gerr != nil {
 		return gerr
 	}
 
-	in, err := os.ReadFile(f.Name())
-	if err != nil {
-		return err
-	}
-
-	out, err := format.Source(in)
-	if err != nil {
-		return err
-	}
-
-	return os.WriteFile(f.Name(), out, 0644)
+  return nil
 }

definition/generate/command/generate.go

@@ -0,0 +1,68 @@
+package command
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition/generate"
+	"gitoa.ru/go-4devs/config/provider/chain"
+	"gitoa.ru/go-4devs/console"
+	"gitoa.ru/go-4devs/console/output"
+)
+
+const Name = "config:generate"
+
+func Handle(ctx context.Context, in config.Provider, out output.Output, next console.Action) error {
+	var name string
+
+	value, err := in.Value(ctx, generate.OptionFile)
+	if err == nil {
+		name = value.String()
+	}
+
+	if name == "" {
+		name = os.Getenv("GOFILE")
+	}
+
+	parser, err := generate.Parse(ctx, name)
+	if err != nil {
+		return fmt.Errorf("parse:%w", err)
+	}
+
+	mem, merr := generate.NewMemoryProvider(name,
+		generate.WithOutName(parser.OutName()),
+		generate.WithFullPkg(parser.FullPkg()),
+		generate.WithMethods(parser.Methods()...),
+	)
+	if merr != nil {
+		return fmt.Errorf("mem provider:%w", merr)
+	}
+
+	return next(ctx, chain.New(in, mem), out)
+}
+
+func Execute(ctx context.Context, in config.Provider, _ output.Output) error {
+	cfg := generate.NewConfigure(ctx, in)
+
+	if err := generate.Generate(ctx, cfg); err != nil {
+		return fmt.Errorf("%w", err)
+	}
+
+	return nil
+}
+
+func Command() *console.Command {
+	return &console.Command{
+		Description: "",
+		Help:        "",
+		Version:     "v0.0.1",
+		Hidden:      false,
+		Prepare:     nil,
+		Handle:      Handle,
+		Name:        Name,
+		Execute:     Execute,
+		Configure:   generate.Configure,
+	}
+}

definition/generate/configure.go

@@ -0,0 +1,134 @@
+package generate
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition/option"
+	"gitoa.ru/go-4devs/config/provider/memory"
+)
+
+const (
+	OptionFile        = "file"
+	optionPrefix      = "prefix"
+	optionSuffix      = "suffix"
+	optionSkipContext = "skip-context"
+	optionBuildTags   = "build-tags"
+	optionOutName     = "out-name"
+	optionMethod      = "method"
+	optionFullPkg     = "full-pkg"
+)
+
+func WithPrefix(in string) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		err := m.AppendOption(in, optionPrefix)
+		if err != nil {
+			return fmt.Errorf("append %v:%w", optionPrefix, err)
+		}
+
+		return nil
+	}
+}
+
+func WithSuffix(in string) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		err := m.AppendOption(in, optionSuffix)
+		if err != nil {
+			return fmt.Errorf("append %v:%w", optionSuffix, err)
+		}
+
+		return nil
+	}
+}
+
+func WithSkipContext(in bool) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		err := m.AppendOption(strconv.FormatBool(in), optionSkipContext)
+		if err != nil {
+			return fmt.Errorf("append %v:%w", optionSkipContext, err)
+		}
+
+		return nil
+	}
+}
+
+func WithBuildTags(in string) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		err := m.AppendOption(in, optionBuildTags)
+		if err != nil {
+			return fmt.Errorf("append %v:%w", optionBuildTags, err)
+		}
+
+		return nil
+	}
+}
+
+func WithOutName(in string) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		err := m.AppendOption(in, optionOutName)
+		if err != nil {
+			return fmt.Errorf("append %v:%w", optionOutName, err)
+		}
+
+		return nil
+	}
+}
+
+func WithMethods(methods ...string) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		for _, method := range methods {
+			err := m.AppendOption(method, optionMethod)
+			if err != nil {
+				return fmt.Errorf("append %v:%w", optionMethod, err)
+			}
+		}
+
+		return nil
+	}
+}
+
+func WithFullPkg(in string) func(*memory.Map) error {
+	return func(m *memory.Map) error {
+		err := m.AppendOption(in, optionFullPkg)
+		if err != nil {
+			return fmt.Errorf("append %v:%w", optionFullPkg, err)
+		}
+
+		return nil
+	}
+}
+
+func NewMemoryProvider(file string, opts ...func(*memory.Map) error) (*memory.Map, error) {
+	cfg := new(memory.Map)
+
+	err := cfg.AppendOption(file, OptionFile)
+	if err != nil {
+		return nil, fmt.Errorf("append %v:%w", OptionFile, err)
+	}
+
+	for idx, opt := range opts {
+		err = opt(cfg)
+		if err != nil {
+			return nil, fmt.Errorf("opt[%d]:%w", idx, err)
+		}
+	}
+
+	return cfg, nil
+}
+
+func Configure(_ context.Context, def config.Definition) error {
+	def.Add(
+		option.String(OptionFile, "set file", option.Required),
+		option.String(optionPrefix, "struct prefix"),
+		option.String(optionSuffix, "struct suffix", option.Default("Config")),
+		option.Bool(optionSkipContext, "skip contect to method"),
+		option.String(optionBuildTags, "add build tags"),
+		option.String(optionOutName, "set out name"),
+		option.String(optionMethod, "set method", option.Slice),
+		option.String(optionFullPkg, "set full pkg"),
+	)
+
+	return nil
+}

definition/generate/configure_config.go

@@ -0,0 +1,231 @@
+package generate
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+
+	"gitoa.ru/go-4devs/config"
+)
+
+func NewConfigure(ctx context.Context, prov config.Provider) ConfigureConfig {
+	return ConfigureConfig{
+		Provider: prov,
+		ctx:      ctx,
+		handle: func(err error) {
+			if !errors.Is(err, config.ErrNotFound) {
+				log.Print(err)
+			}
+		},
+	}
+}
+
+type ConfigureConfig struct {
+	config.Provider
+
+	ctx    context.Context //nolint:containedctx
+	handle func(err error)
+}
+
+func (i ConfigureConfig) ReadBuildTags() (string, error) {
+	val, verr := i.Value(i.ctx, optionBuildTags)
+	if verr != nil {
+		return "", fmt.Errorf("get %v:%w", optionBuildTags, verr)
+	}
+
+	data, err := val.ParseString()
+	if err != nil {
+		return "", fmt.Errorf("parse %v:%w", optionBuildTags, err)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) BuildTags() string {
+	data, err := i.ReadBuildTags()
+	if err != nil {
+		i.handle(err)
+
+		return ""
+	}
+
+	return data
+}
+
+func (i ConfigureConfig) ReadOutName() (string, error) {
+	val, err := i.Value(i.ctx, optionOutName)
+	if err != nil {
+		return "", fmt.Errorf("get %v:%w", optionOutName, err)
+	}
+
+	data, derr := val.ParseString()
+	if derr != nil {
+		return "", fmt.Errorf("parse %v:%w", optionOutName, derr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) OutName() string {
+	data, err := i.ReadOutName()
+	if err != nil {
+		i.handle(err)
+
+		return ""
+	}
+
+	return data
+}
+
+func (i ConfigureConfig) ReadFile() (string, error) {
+	val, err := i.Value(i.ctx, OptionFile)
+	if err != nil {
+		return "", fmt.Errorf("get %v:%w", OptionFile, err)
+	}
+
+	data, derr := val.ParseString()
+	if derr != nil {
+		return "", fmt.Errorf("parse %v:%w", OptionFile, derr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) File() string {
+	data, err := i.ReadFile()
+	if err != nil {
+		i.handle(err)
+
+		return ""
+	}
+
+	return data
+}
+
+func (i ConfigureConfig) ReadMethods() ([]string, error) {
+	val, err := i.Value(i.ctx, optionMethod)
+	if err != nil {
+		return nil, fmt.Errorf("get %v:%w", optionMethod, err)
+	}
+
+	var data []string
+
+	perr := val.Unmarshal(&data)
+	if perr != nil {
+		return nil, fmt.Errorf("unmarshal %v:%w", optionMethod, perr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) Methods() []string {
+	data, err := i.ReadMethods()
+	if err != nil {
+		i.handle(err)
+
+		return nil
+	}
+
+	return data
+}
+
+func (i ConfigureConfig) ReadSkipContext() (bool, error) {
+	val, err := i.Value(i.ctx, optionSkipContext)
+	if err != nil {
+		return false, fmt.Errorf("get %v:%w", optionSkipContext, err)
+	}
+
+	data, derr := val.ParseBool()
+	if derr != nil {
+		return false, fmt.Errorf("parse %v:%w", optionSkipContext, derr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) SkipContext() bool {
+	data, err := i.ReadSkipContext()
+	if err != nil {
+		i.handle(err)
+
+		return false
+	}
+
+	return data
+}
+
+func (i ConfigureConfig) ReadPrefix() (string, error) {
+	val, err := i.Value(i.ctx, optionPrefix)
+	if err != nil {
+		return "", fmt.Errorf("get %v: %w", optionPrefix, err)
+	}
+
+	data, derr := val.ParseString()
+	if derr != nil {
+		return "", fmt.Errorf("parse %v:%w", optionPrefix, derr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) Prefix() string {
+	val, err := i.ReadPrefix()
+	if err != nil {
+		i.handle(err)
+
+		return ""
+	}
+
+	return val
+}
+
+func (i ConfigureConfig) ReadSuffix() (string, error) {
+	val, err := i.Value(i.ctx, optionSuffix)
+	if err != nil {
+		return "", fmt.Errorf("get %v:%w", optionSuffix, err)
+	}
+
+	data, derr := val.ParseString()
+	if derr != nil {
+		return "", fmt.Errorf("parse %v:%w", optionSuffix, derr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) Suffix() string {
+	data, err := i.ReadSuffix()
+	if err != nil {
+		i.handle(err)
+
+		return ""
+	}
+
+	return data
+}
+
+func (i ConfigureConfig) ReadFullPkg() (string, error) {
+	val, err := i.Value(i.ctx, optionFullPkg)
+	if err != nil {
+		return "", fmt.Errorf("get %v:%w", optionFullPkg, err)
+	}
+
+	data, derr := val.ParseString()
+	if derr != nil {
+		return "", fmt.Errorf("parse %v:%w", optionFullPkg, derr)
+	}
+
+	return data, nil
+}
+
+func (i ConfigureConfig) FullPkg() string {
+	data, err := i.ReadFullPkg()
+	if err != nil {
+		i.handle(err)
+
+		return ""
+	}
+
+	return data
+}

definition/generate/example/config_config.go

@@ -1,206 +0,0 @@
-// Code generated gitoa.ru/go-4devs/config DO NOT EDIT.
-package example
-
-import (
-	context "context"
-	fmt "fmt"
-	config "gitoa.ru/go-4devs/config"
-)
-
-func WithInputConfigLog(log func(context.Context, string, ...any)) func(*InputConfig) {
-	return func(ci *InputConfig) {
-		ci.log = log
-	}
-}
-
-func NewInputConfig(prov config.Provider, opts ...func(*InputConfig)) InputConfig {
-	i := InputConfig{
-		Provider: prov,
-		log: func(_ context.Context, format string, args ...any) {
-			fmt.Printf(format, args...)
-		},
-	}
-
-	for _, opt := range opts {
-		opt(&i)
-	}
-
-	return i
-}
-
-type InputConfig struct {
-	config.Provider
-	log func(context.Context, string, ...any)
-}
-
-// readTest test string.
-func (i InputConfig) readTest(ctx context.Context) (v string, e error) {
-	val, err := i.Value(ctx, "test")
-	if err != nil {
-		return v, fmt.Errorf("read [%v]:%w", []string{"test"}, err)
-
-	}
-
-	return val.ParseString()
-
-}
-
-// ReadTest test string.
-func (i InputConfig) ReadTest() (string, error) {
-	return i.readTest(context.Background())
-}
-
-// Test test string.
-func (i InputConfig) Test() string {
-	val, err := i.readTest(context.Background())
-	if err != nil {
-		i.log(context.Background(), "get [%v]: %v", []string{"test"}, err)
-	}
-
-	return val
-}
-
-type InputConfigUser struct {
-	InputConfig
-}
-
-// User configure user.
-func (i InputConfig) User() InputConfigUser {
-	return InputConfigUser{i}
-}
-
-// readName name.
-func (i InputConfigUser) readName(ctx context.Context) (v string, e error) {
-	val, err := i.Value(ctx, "user", "name")
-	if err != nil {
-		i.log(context.Background(), "read [%v]: %v", []string{"user", "name"}, err)
-
-		return "4devs", nil
-	}
-
-	return val.ParseString()
-
-}
-
-// ReadName name.
-func (i InputConfigUser) ReadName(ctx context.Context) (string, error) {
-	return i.readName(ctx)
-}
-
-// Name name.
-func (i InputConfigUser) Name(ctx context.Context) string {
-	val, err := i.readName(ctx)
-	if err != nil {
-		i.log(ctx, "get [%v]: %v", []string{"user", "name"}, err)
-	}
-
-	return val
-}
-
-// readPass password.
-func (i InputConfigUser) readPass(ctx context.Context) (v string, e error) {
-	val, err := i.Value(ctx, "user", "pass")
-	if err != nil {
-		return v, fmt.Errorf("read [%v]:%w", []string{"user", "pass"}, err)
-
-	}
-
-	return val.ParseString()
-
-}
-
-// ReadPass password.
-func (i InputConfigUser) ReadPass(ctx context.Context) (string, error) {
-	return i.readPass(ctx)
-}
-
-// Pass password.
-func (i InputConfigUser) Pass(ctx context.Context) string {
-	val, err := i.readPass(ctx)
-	if err != nil {
-		i.log(ctx, "get [%v]: %v", []string{"user", "pass"}, err)
-	}
-
-	return val
-}
-
-type InputConfigLog struct {
-	InputConfig
-}
-
-// Log configure logger.
-func (i InputConfig) Log() InputConfigLog {
-	return InputConfigLog{i}
-}
-
-// readLevel log level.
-func (i InputConfigLog) readLevel(ctx context.Context) (v Level, e error) {
-	val, err := i.Value(ctx, "log", "level")
-	if err != nil {
-		return v, fmt.Errorf("read [%v]:%w", []string{"log", "level"}, err)
-
-	}
-
-	pval, perr := val.ParseString()
-	if perr != nil {
-		return v, fmt.Errorf("read [%v]:%w", []string{"log", "level"}, perr)
-	}
-
-	return v, v.UnmarshalText([]byte(pval))
-}
-
-// ReadLevel log level.
-func (i InputConfigLog) ReadLevel(ctx context.Context) (Level, error) {
-	return i.readLevel(ctx)
-}
-
-// Level log level.
-func (i InputConfigLog) Level(ctx context.Context) Level {
-	val, err := i.readLevel(ctx)
-	if err != nil {
-		i.log(ctx, "get [%v]: %v", []string{"log", "level"}, err)
-	}
-
-	return val
-}
-
-type InputConfigLogService struct {
-	InputConfigLog
-	service string
-}
-
-// Service servise logger.
-func (i InputConfigLog) Service(key string) InputConfigLogService {
-	return InputConfigLogService{i, key}
-}
-
-// readLevel log level.
-func (i InputConfigLogService) readLevel(ctx context.Context) (v Level, e error) {
-	val, err := i.Value(ctx, "log", i.service, "level")
-	if err != nil {
-		return v, fmt.Errorf("read [%v]:%w", []string{"log", i.service, "level"}, err)
-
-	}
-
-	pval, perr := val.ParseString()
-	if perr != nil {
-		return v, fmt.Errorf("read [%v]:%w", []string{"log", i.service, "level"}, perr)
-	}
-
-	return v, v.UnmarshalText([]byte(pval))
-}
-
-// ReadLevel log level.
-func (i InputConfigLogService) ReadLevel(ctx context.Context) (Level, error) {
-	return i.readLevel(ctx)
-}
-
-// Level log level.
-func (i InputConfigLogService) Level(ctx context.Context) Level {
-	val, err := i.readLevel(ctx)
-	if err != nil {
-		i.log(ctx, "get [%v]: %v", []string{"log", i.service, "level"}, err)
-	}
-
-	return val
-}

definition/generate/example/example.go

@@ -3,13 +3,15 @@ package example
 import (
 	"context"
 
-	"gitoa.ru/go-4devs/config/definition"
+	configs "gitoa.ru/go-4devs/config"
 	"gitoa.ru/go-4devs/config/definition/generate/view"
 	"gitoa.ru/go-4devs/config/definition/group"
 	"gitoa.ru/go-4devs/config/definition/option"
 	"gitoa.ru/go-4devs/config/definition/proto"
 )
 
+//go:generate go run ../../../cmd/config/main.go config:generate
+
 type Level string
 
 func (l *Level) UnmarshalText(in []byte) error {
@@ -19,13 +21,13 @@ func (l *Level) UnmarshalText(in []byte) error {
 	return nil
 }
 
-func Config(_ context.Context, def *definition.Definition) error {
+func Example(_ context.Context, def configs.Definition) error {
 	def.Add(
 		option.String("test", "test string", view.WithSkipContext),
 		group.New("user", "configure user",
 			option.String("name", "name", option.Default("4devs")),
 			option.String("pass", "password"),
-		),
+		).With(view.WithContext),
 
 		group.New("log", "configure logger",
 			option.New("level", "log level", Level("")),

definition/generate/example/example_config.go

@@ -0,0 +1,153 @@
+// Code generated gitoa.ru/go-4devs/config DO NOT EDIT.
+package example
+
+import (
+	"context"
+	"fmt"
+	"gitoa.ru/go-4devs/config"
+)
+
+func WithExampleConfigHandle(fn func(context.Context, error)) func(*ExampleConfig) {
+	return func(ci *ExampleConfig) {
+		ci.handle = fn
+	}
+}
+
+func NewExampleConfig(ctx context.Context, prov config.Provider, opts ...func(*ExampleConfig)) ExampleConfig {
+	i := ExampleConfig{
+		Provider: prov,
+		handle: func(_ context.Context, err error) {
+			fmt.Printf("ExampleConfig:%v", err)
+		},
+		ctx: ctx,
+	}
+
+	for _, opt := range opts {
+		opt(&i)
+	}
+
+	return i
+}
+
+type ExampleConfig struct {
+	config.Provider
+	handle func(context.Context, error)
+	ctx    context.Context
+}
+
+// readTest test string.
+func (i ExampleConfig) readTest(ctx context.Context) (v string, e error) {
+	val, err := i.Value(ctx, "test")
+	if err != nil {
+		return v, fmt.Errorf("read [%v]:%w", []string{"test"}, err)
+
+	}
+
+	return val.ParseString()
+
+}
+
+// ReadTest test string.
+func (i ExampleConfig) ReadTest() (string, error) {
+	return i.readTest(i.ctx)
+}
+
+// Test test string.
+func (i ExampleConfig) Test() string {
+	val, err := i.readTest(i.ctx)
+	if err != nil {
+		i.handle(i.ctx, err)
+	}
+
+	return val
+}
+
+type UserConfig struct {
+	ExampleConfig
+}
+
+// User configure user.
+func (i ExampleConfig) User() UserConfig {
+	return UserConfig{i}
+}
+
+type LogConfig struct {
+	ExampleConfig
+}
+
+// Log configure logger.
+func (i ExampleConfig) Log() LogConfig {
+	return LogConfig{i}
+}
+
+// readLevel log level.
+func (i LogConfig) readLevel(ctx context.Context) (v Level, e error) {
+	val, err := i.Value(ctx, "log", "level")
+	if err != nil {
+		return v, fmt.Errorf("read [%v]:%w", []string{"log", "level"}, err)
+
+	}
+
+	pval, perr := val.ParseString()
+	if perr != nil {
+		return v, fmt.Errorf("parse [%v]:%w", []string{"log", "level"}, perr)
+	}
+
+	return v, v.UnmarshalText([]byte(pval))
+}
+
+// ReadLevel log level.
+func (i LogConfig) ReadLevel(ctx context.Context) (Level, error) {
+	return i.readLevel(ctx)
+}
+
+// Level log level.
+func (i LogConfig) Level(ctx context.Context) Level {
+	val, err := i.readLevel(ctx)
+	if err != nil {
+		i.handle(ctx, err)
+	}
+
+	return val
+}
+
+type LogServiceConfig struct {
+	LogConfig
+	service string
+}
+
+// Service servise logger.
+func (i LogConfig) Service(key string) LogServiceConfig {
+	return LogServiceConfig{i, key}
+}
+
+// readLevel log level.
+func (i LogServiceConfig) readLevel(ctx context.Context) (v Level, e error) {
+	val, err := i.Value(ctx, "log", i.service, "level")
+	if err != nil {
+		return v, fmt.Errorf("read [%v]:%w", []string{"log", i.service, "level"}, err)
+
+	}
+
+	pval, perr := val.ParseString()
+	if perr != nil {
+		return v, fmt.Errorf("parse [%v]:%w", []string{"log", i.service, "level"}, perr)
+	}
+
+	return v, v.UnmarshalText([]byte(pval))
+}
+
+// ReadLevel log level.
+func (i LogServiceConfig) ReadLevel(ctx context.Context) (Level, error) {
+	return i.readLevel(ctx)
+}
+
+// Level log level.
+func (i LogServiceConfig) Level(ctx context.Context) Level {
+	val, err := i.readLevel(ctx)
+	if err != nil {
+		i.handle(ctx, err)
+	}
+
+	return val
+}

definition/generate/example/generate_test.go

@@ -1,59 +0,0 @@
-package example_test
-
-import (
-	"context"
-	"os"
-	"testing"
-
-	"gitoa.ru/go-4devs/config/definition"
-	"gitoa.ru/go-4devs/config/definition/generate"
-	"gitoa.ru/go-4devs/config/definition/generate/bootstrap"
-	"gitoa.ru/go-4devs/config/definition/generate/example"
-)
-
-func TestGenerate_Bootstrap(t *testing.T) {
-	t.SkipNow()
-	t.Parallel()
-
-	ctx := context.Background()
-	options := definition.New()
-	_ = example.Config(ctx, options)
-
-	cfg, _ := generate.NewGConfig("./config.go",
-		generate.WithMethods("Config"),
-		generate.WithFullPkg("gitoa.ru/go-4devs/config/definition/generate/example"),
-	)
-
-	path, err := bootstrap.Bootstrap(ctx, cfg)
-	if err != nil {
-		t.Error(err)
-		t.FailNow()
-	}
-
-	os.Remove(path)
-
-	t.Log(path)
-	t.FailNow()
-}
-
-func TestGenerate_Genereate(t *testing.T) {
-	t.SkipNow()
-	t.Parallel()
-
-	ctx := context.Background()
-	options := definition.New()
-	_ = example.Config(ctx, options)
-
-	cfg, _ := generate.NewGConfig("./config.go",
-		generate.WithMethods("Config"),
-		generate.WithFullPkg("gitoa.ru/go-4devs/config/definition/generate/example"),
-	)
-
-	err := generate.Generate(ctx, cfg)
-	if err != nil {
-		t.Error(err)
-		t.FailNow()
-	}
-
-	t.FailNow()
-}

definition/generate/exec.go

@@ -11,14 +11,6 @@ import (
 	"gitoa.ru/go-4devs/config/definition/generate/bootstrap"
 )
 
-func NewGConfig(fname string, opts ...Option) (Config, error) {
-	opts = append([]Option{
-		WithFile(fname),
-	}, opts...)
-
-	return NewConfig(opts...), nil
-}
-
 type GConfig interface {
 	BuildTags() string
 	OutName() string

definition/generate/generate.go

@@ -14,137 +14,23 @@ import (
 	"gitoa.ru/go-4devs/config/definition/generate/pkg"
 	"gitoa.ru/go-4devs/config/definition/generate/render"
 	"gitoa.ru/go-4devs/config/definition/generate/view"
-	"gitoa.ru/go-4devs/config/param"
 )
 
-type Option func(*Config)
-
-func WithSkipContext(c *Config) {
-	view.WithSkipContext(c.Params)
-}
-
-func WithPrefix(name string) Option {
-	return func(c *Config) {
-		c.prefix = name
-	}
-}
-
-func WithSuffix(name string) Option {
-	return func(c *Config) {
-		c.suffix = name
-	}
-}
-
-// WithMethods set methosd.
-//
-// generate.WithMethods(runtime.FuncForPC(reflect.ValueOf(configure).Pointer()).Name()).
-func WithMethods(in ...string) Option {
-	return func(c *Config) {
-		c.methods = in
-	}
-}
-
-func WithOutName(in string) Option {
-	return func(c *Config) {
-		c.outName = in
-	}
-}
-
-func WithFile(in string) Option {
-	return func(c *Config) {
-		c.file = in
-	}
-}
-
-func WithFullPkg(in string) Option {
-	return func(c *Config) {
-		c.fullPkg = in
-	}
-}
-
-func NewConfig(opts ...Option) Config {
-	var cfg Config
-
-	cfg.Params = param.New()
-	cfg.prefix = "Input"
-
-	for _, opt := range opts {
-		opt(&cfg)
-	}
-
-	return cfg
-}
-
-type Config struct {
-	param.Params
-
-	methods   []string
-	prefix    string
-	suffix    string
-	fullPkg   string
-	pkg       string
-	file      string
-	buildTags string
-	outName   string
-}
-
-func (c Config) BuildTags() string {
-	return c.buildTags
-}
-
-func (c Config) Pkg() string {
-	if c.pkg == "" {
-		if idx := strings.LastIndex(c.fullPkg, "/"); idx != -1 {
-			c.pkg = c.fullPkg[idx+1:]
-		}
-	}
-
-	return c.pkg
-}
-
-func (c Config) FullPkg() string {
-	return c.fullPkg
-}
-
-func (c Config) SkipContext() bool {
-	return view.IsSkipContext(c.Params)
-}
-
-func (c Config) Methods() []string {
-	return c.methods
-}
-
-func (c Config) Prefix() string {
-	return c.prefix
-}
-
-func (c Config) Suffix() string {
-	return c.suffix
-}
-
-func (c Config) File() string {
-	return c.file
-}
-
-func (c Config) OutName() string {
-	return c.outName
-}
-
 //go:embed tpl/*
 var tpls embed.FS
 
 var initTpl = template.Must(template.New("tpls").ParseFS(tpls, "tpl/*.tpl")).Lookup("init.go.tpl")
 
-func Run(_ context.Context, cfg Config, w io.Writer, inputs ...Input) error {
+func Run(_ context.Context, fullPkg string, w io.Writer, defs ...config.Options) error {
 	data := Data{
-		Config: cfg,
-		imp:    pkg.NewImports(cfg.FullPkg()).Adds("fmt", "context", "gitoa.ru/go-4devs/config"),
+		Packages: pkg.NewImports(fullPkg).
+			Adds("fmt", "context", "gitoa.ru/go-4devs/config"),
 	}
 
 	var buff bytes.Buffer
 
-	for _, in := range inputs {
-		vi := view.NewViews(in.Method(), data.Params, in.Options(), view.WithKeys())
+	for _, in := range defs {
+		vi := view.NewViews(in)
 
 		if err := render.Render(&buff, vi, data); err != nil {
 			return fmt.Errorf("render:%w", err)
@@ -163,32 +49,17 @@ func Run(_ context.Context, cfg Config, w io.Writer, inputs ...Input) error {
 }
 
 type Data struct {
-	Config
-
-	imp *pkg.Imports
-}
-
-func (f Data) Imports() []pkg.Import {
-	return f.imp.Imports()
+	*pkg.Packages
 }
 
 func (f Data) StructName(name string) string {
-	return f.Prefix() + FuncName(name) + f.Suffix()
+	return FuncName(name)
 }
 
 func (f Data) FuncName(in string) string {
 	return FuncName(in)
 }
 
-func (f Data) AddType(pkg string) (string, error) {
-	short, err := f.imp.AddType(pkg)
-	if err != nil {
-		return "", fmt.Errorf("data: %w", err)
-	}
-
-	return short, nil
-}
-
 func FuncName(name string) string {
 	data := strings.Builder{}
 	toUp := true
@@ -211,23 +82,3 @@ func FuncName(name string) string {
 
 	return data.String()
 }
-
-func NewInput(method string, options config.Options) Input {
-	return Input{
-		method:  method,
-		options: options,
-	}
-}
-
-type Input struct {
-	options config.Options
-	method  string
-}
-
-func (i Input) Method() string {
-	return i.method
-}
-
-func (i Input) Options() config.Options {
-	return i.options
-}

definition/generate/generate_test.go

@@ -1,11 +1,18 @@
 package generate_test
 
 import (
+	"context"
+	"os"
+	"testing"
+
 	"gitoa.ru/go-4devs/config/definition"
+	"gitoa.ru/go-4devs/config/definition/generate"
+	"gitoa.ru/go-4devs/config/definition/generate/bootstrap"
 	"gitoa.ru/go-4devs/config/definition/generate/view"
 	"gitoa.ru/go-4devs/config/definition/group"
 	"gitoa.ru/go-4devs/config/definition/option"
 	"gitoa.ru/go-4devs/config/definition/proto"
+	"gitoa.ru/go-4devs/config/test/require"
 )
 
 type LogLevel string
@@ -17,7 +24,7 @@ func (l *LogLevel) UnmarshalText(in []byte) error {
 	return nil
 }
 
-func Configure(def *definition.Definition) {
+func Configure(_ context.Context, def *definition.Definition) error {
 	def.Add(
 		option.String("test", "test string", view.WithSkipContext),
 		group.New("user", "configure user",
@@ -30,4 +37,52 @@ func Configure(def *definition.Definition) {
 			proto.New("service", "servise logger", option.New("level", "log level", LogLevel(""))),
 		),
 	)
+
+	return nil
+}
+
+func TestGenerate_Bootstrap(t *testing.T) {
+	t.SkipNow()
+	t.Parallel()
+
+	ctx := context.Background()
+	options := definition.New()
+	err := Configure(ctx, options)
+	require.NoError(t, err)
+
+	cfg, _ := generate.NewMemoryProvider("generate_test.go",
+		generate.WithMethods("Config"),
+		generate.WithFullPkg("gitoa.ru/go-4devs/config/definition/generate_test"),
+	)
+
+	path, err := bootstrap.Bootstrap(ctx, generate.NewConfigure(ctx, cfg))
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	os.Remove(path)
+
+	t.Log(path)
+	t.FailNow()
+}
+
+func TestGenerate_Genereate(t *testing.T) {
+	t.SkipNow()
+	t.Parallel()
+
+	ctx := context.Background()
+	options := definition.New()
+	err := Configure(ctx, options)
+	require.NoError(t, err)
+
+	cfg, _ := generate.NewMemoryProvider("generate_test.go",
+		generate.WithMethods("Config"),
+		generate.WithFullPkg("gitoa.ru/go-4devs/config/definition/generate_test"),
+	)
+
+	err = generate.Generate(ctx, generate.NewConfigure(ctx, cfg))
+	require.NoError(t, err)
+
+	t.FailNow()
 }

definition/generate/parser.go

@@ -0,0 +1,152 @@
+package generate
+
+import (
+	"context"
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"os"
+	"reflect"
+	"slices"
+	"strings"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition/generate/pkg"
+)
+
+const NameSuffix = "_config.go"
+
+func Parse(ctx context.Context, name string) (Parser, error) {
+	var parse Parser
+
+	parse.file = name
+
+	stats, err := os.Stat(name)
+	if err != nil {
+		return parse, fmt.Errorf("stats:%w", err)
+	}
+
+	parse.fullPkg, err = pkg.ByPath(ctx, name, stats.IsDir())
+	if err != nil {
+		return parse, fmt.Errorf("get pkg:%w", err)
+	}
+
+	parse.methods, err = NewParseMethods(
+		name,
+		[]reflect.Type{
+			reflect.TypeFor[context.Context](),
+			reflect.TypeFor[config.Definition](),
+		},
+		[]reflect.Type{reflect.TypeFor[error]()},
+	)
+	if err != nil {
+		return parse, fmt.Errorf("parse methods:%w", err)
+	}
+
+	return parse, nil
+}
+
+func NewParseMethods(file string, params []reflect.Type, results []reflect.Type) ([]string, error) {
+	pfile, err := parser.ParseFile(token.NewFileSet(), file, nil, parser.ParseComments)
+	if err != nil {
+		return nil, fmt.Errorf("parse:%w", err)
+	}
+
+	resultAlias := importAlias(pfile, results)
+	paramsAlias := importAlias(pfile, params)
+
+	var methods []string
+
+	ast.Inspect(pfile, func(anode ast.Node) bool {
+		if fn, ok := anode.(*ast.FuncDecl); ok &&
+			fn.Recv == nil &&
+			fn.Type != nil &&
+			(fn.Type.Params != nil && len(params) == len(fn.Type.Params.List) || len(params) == 0 && fn.Type.Params == nil) &&
+			(fn.Type.Results != nil && len(results) == len(fn.Type.Results.List) || len(results) == 0 && fn.Type.Results == nil) {
+			if hasFields(fn.Type.Params, params, paramsAlias) && hasFields(fn.Type.Results, results, resultAlias) {
+				methods = append(methods, fn.Name.String())
+			}
+		}
+
+		return true
+	})
+
+	return methods, nil
+}
+
+func importAlias(file *ast.File, params []reflect.Type) map[int][]string {
+	paramsAlias := make(map[int][]string, len(params))
+	for idx := range params {
+		name := params[idx].Name()
+		if pkgPath := params[idx].PkgPath(); pkgPath != "" {
+			name = pkg.Pkg(pkgPath)
+		}
+
+		paramsAlias[idx] = append(paramsAlias[idx], name)
+	}
+
+	ast.Inspect(file, func(anode ast.Node) bool {
+		if exp, ok := anode.(*ast.ImportSpec); ok {
+			pathName := strings.Trim(exp.Path.Value, "\"")
+			pname := pkg.Pkg(pathName)
+
+			if exp.Name != nil {
+				pname = exp.Name.String()
+			}
+
+			for idx, param := range params {
+				if pathName == param.PkgPath() {
+					paramsAlias[idx] = append(paramsAlias[idx], pname)
+				}
+			}
+		}
+
+		return true
+	})
+
+	return paramsAlias
+}
+
+func hasFields(fields *ast.FieldList, params []reflect.Type, alias map[int][]string) bool {
+	for idx, one := range fields.List {
+		iparam := params[idx]
+		if ident, iok := one.Type.(*ast.Ident); iok && iparam.String() == ident.String() {
+			return true
+		}
+
+		selector, sok := one.Type.(*ast.SelectorExpr)
+		if !sok {
+			return false
+		}
+
+		if iparam.Name() != selector.Sel.String() {
+			return false
+		}
+
+		salias, saok := selector.X.(*ast.Ident)
+		if iparam.PkgPath() != "" && saok && !slices.Contains(alias[idx], salias.String()) {
+			return false
+		}
+	}
+
+	return true
+}
+
+type Parser struct {
+	file    string
+	fullPkg string
+	methods []string
+}
+
+func (p Parser) OutName() string {
+	return strings.ReplaceAll(p.file, ".go", NameSuffix)
+}
+
+func (p Parser) FullPkg() string {
+	return p.fullPkg
+}
+
+func (p Parser) Methods() []string {
+	return p.methods
+}

definition/generate/pkg/imports.go

@@ -6,8 +6,8 @@ import (
 	"strings"
 )
 
-func NewImports(pkg string) *Imports {
-	imp := Imports{
+func NewImports(pkg string) *Packages {
+	imp := Packages{
 		data: make(map[string]string),
 		pkg:  pkg,
 	}
@@ -15,12 +15,12 @@ func NewImports(pkg string) *Imports {
 	return &imp
 }
 
-type Imports struct {
+type Packages struct {
 	data map[string]string
 	pkg  string
 }
 
-func (i *Imports) Imports() []Import {
+func (i *Packages) Imports() []Import {
 	imports := make([]Import, 0, len(i.data))
 	for name, alias := range i.data {
 		imports = append(imports, Import{
@@ -32,7 +32,7 @@ func (i *Imports) Imports() []Import {
 	return imports
 }
 
-func (i *Imports) Short(fullType string) (string, error) {
+func (i *Packages) Short(fullType string) (string, error) {
 	idx := strings.LastIndexByte(fullType, '.')
 	if idx == -1 {
 		return "", fmt.Errorf("%w: expect package.Type", ErrWrongFormat)
@@ -45,7 +45,7 @@ func (i *Imports) Short(fullType string) (string, error) {
 	return "", fmt.Errorf("%w alias for pkg %v", ErrNotFound, fullType[:idx])
 }
 
-func (i *Imports) AddType(fullType string) (string, error) {
+func (i *Packages) AddType(fullType string) (string, error) {
 	idx := strings.LastIndexByte(fullType, '.')
 	if idx == -1 {
 		return "", fmt.Errorf("%w: expect pckage.Type got %v", ErrWrongFormat, fullType)
@@ -60,7 +60,7 @@ func (i *Imports) AddType(fullType string) (string, error) {
 	return imp.Alias + fullType[idx:], nil
 }
 
-func (i *Imports) Adds(pkgs ...string) *Imports {
+func (i *Packages) Adds(pkgs ...string) *Packages {
 	for _, pkg := range pkgs {
 		i.Add(pkg)
 	}
@@ -68,7 +68,7 @@ func (i *Imports) Adds(pkgs ...string) *Imports {
 	return i
 }
 
-func (i *Imports) Add(pkg string) Import {
+func (i *Packages) Add(pkg string) Import {
 	if pkg == i.pkg {
 		return Import{
 			Alias:   "",
@@ -100,7 +100,31 @@ func (i *Imports) Add(pkg string) Import {
 	}
 }
 
+func (i *Packages) Pkg() string {
+	return Pkg(i.pkg)
+}
+
 type Import struct {
 	Alias   string
 	Package string
 }
+
+func (i Import) Pkg() string {
+	return Pkg(i.Package)
+}
+
+func (i Import) String() string {
+	if i.Alias == i.Pkg() {
+		return fmt.Sprintf("%q", i.Package)
+	}
+
+	return fmt.Sprintf("%s %q", i.Alias, i.Package)
+}
+
+func Pkg(fullPkg string) string {
+	if idx := strings.LastIndex(fullPkg, "/"); idx != -1 {
+		return fullPkg[idx+1:]
+	}
+
+	return fullPkg
+}

definition/generate/pkg/pkg.go

@@ -117,7 +117,7 @@ func getPkgPathFromGOPATH(fname string, isDir bool) (string, error) {
 		gopath = build.Default.GOPATH
 	}
 
-	for _, p := range strings.Split(gopath, string(filepath.ListSeparator)) {
+	for p := range strings.SplitSeq(gopath, string(filepath.ListSeparator)) {
 		prefix := filepath.Join(p, "src") + string(filepath.Separator)
 
 		rel, err := filepath.Rel(prefix, fname)

definition/generate/render/data.go

@@ -18,15 +18,15 @@ type ViewData struct {
 }
 
 func (d ViewData) StructName() string {
-	return d.Rendering.StructName(d.View.ParentName() + "_" + d.View.Name())
+	return d.Rendering.StructName(d.View.StructName())
 }
 
 func (d ViewData) FuncName() string {
 	return d.Rendering.FuncName(d.View.FuncName())
 }
 
-func (d ViewData) ParentName() string {
-	name := d.View.ParentName()
+func (d ViewData) ParentStruct() string {
+	name := d.View.ParentStruct()
 	if name == "" {
 		name = d.Name()
 	}
@@ -43,7 +43,7 @@ func (d ViewData) Type() string {
 }
 
 func (d ViewData) Keys(parent string) string {
-	return Keys(append(d.View.Keys(), d.Name()), parent)
+	return Keys(d.View.Keys(), parent)
 }
 
 func (d ViewData) Value(name, val string) string {

definition/generate/render/render.go

@@ -16,7 +16,7 @@ type Execute func(w io.Writer, vi view.View, rnd Rendering) error
 
 var randders = map[reflect.Type]Execute{
 	reflect.TypeFor[*definition.Definition](): Template(defTpl),
-	reflect.TypeFor[group.Group]():            Template(groupTpl),
+	reflect.TypeFor[*group.Group]():           Template(groupTpl),
 	reflect.TypeFor[option.Option]():          Template(optTpl),
 	reflect.TypeFor[proto.Proto]():            Template(protoTpl),
 }

definition/generate/render/tpl/data/flag_value.go.tpl

@@ -1,8 +1,8 @@
 {{ block "FlagValue" . -}}
     pval, perr := {{.ValName}}.ParseString()
     if perr != nil {
-        return {{.Value}}, fmt.Errorf("read [%v]:%w",[]string{ {{- .Keys "i" -}} }, perr)
+        return {{.Value}}, fmt.Errorf("parse [%v]:%w",[]string{ {{- .Keys "i" -}} }, perr)
     }
 
     return {{.Value}}, {{.Value}}.Set(pval)
-{{- end }}
+{{- end -}}

definition/generate/render/tpl/data/unmarshal_json.go.tpl

@@ -1,8 +1,8 @@
 {{block "UnmarshalJSON" . -}}
     pval, perr := {{.ValName}}.ParseString()
     if perr != nil {
-	    return {{.Value}}, fmt.Errorf("read [%v]:%w", []string{ {{- .Keys "i" -}} }, perr)
+	    return {{.Value}}, fmt.Errorf("parse [%v]:%w", []string{ {{- .Keys "i" -}} }, perr)
     }
 
     return {{.Value}}, {{.Value}}.UnmarshalJSON([]byte(pval))
-{{- end }}
+{{- end -}}

definition/generate/render/tpl/data/unmarshal_text.go.tpl

@@ -1,8 +1,8 @@
 {{ block "UnmarshalText" . -}}
     pval, perr := {{.ValName}}.ParseString()
     if perr != nil {
-        return {{.Value}}, fmt.Errorf("read [%v]:%w", []string{ {{- .Keys "i" -}} }, perr)
+        return {{.Value}}, fmt.Errorf("parse [%v]:%w", []string{ {{- .Keys "i" -}} }, perr)
     }
 
     return {{.Value}}, {{.Value}}.UnmarshalText([]byte(pval))
-{{- end }}
+{{- end -}}

definition/generate/render/tpl/definition.go.tpl

@@ -1,15 +1,16 @@
-func With{{.StructName}}Log(log func(context.Context, string, ...any)) func(*{{.StructName}}) {
+func With{{.StructName}}Handle(fn func(context.Context, error)) func(*{{.StructName}}) {
 	return func(ci *{{.StructName}}) {
-		ci.log = log
+		ci.handle = fn
 	}
 }
 
-func New{{.StructName}}(prov config.Provider, opts ...func(*{{.StructName}})) {{.StructName}} {
+func New{{.StructName}}({{if or .SkipContext .ClildSkipContext }} ctx context.Context,{{end}}prov config.Provider, opts ...func(*{{.StructName}})) {{.StructName}} {
 	i := {{.StructName}}{
 		Provider: prov,
-		log: func(_ context.Context, format string, args ...any) {
-			fmt.Printf(format, args...)
+		handle: func(_ context.Context, err error) {
+			fmt.Printf("{{.StructName}}:%v",err)
 		},
+		{{if or .SkipContext .ClildSkipContext }} ctx: ctx, {{end}}
 	}
 
 	for _, opt := range opts {
@@ -21,5 +22,6 @@ func New{{.StructName}}(prov config.Provider, opts ...func(*{{.StructName}})) {{
 
 type {{.StructName}} struct {
 	config.Provider
-	log   func(context.Context, string, ...any)
+	handle   func(context.Context, error)
+	{{if or .SkipContext .ClildSkipContext}}ctx context.Context {{end}}
 }

definition/generate/render/tpl/group.go.tpl

@@ -1,8 +1,8 @@
 type {{.StructName}} struct {
-    {{.ParentName}}
+    {{.ParentStruct}}
 }
 
 // {{.FuncName}} {{.Description}}.
-func (i {{.ParentName}}) {{.FuncName}}() {{.StructName}} {
+func (i {{.ParentStruct}}) {{.FuncName}}() {{.StructName}} {
 	return {{.StructName}}{i}
 }

definition/generate/render/tpl/option/option.go.tpl

@@ -1,9 +1,9 @@
 // read{{.FuncName}} {{.Description}}.
-func (i {{.ParentName}}) read{{.FuncName}}(ctx context.Context) (v {{.Type}},e error) {
+func (i {{.ParentStruct}}) read{{.FuncName}}(ctx context.Context) (v {{.Type}},e error) {
 	val, err := i.Value(ctx, {{ .Keys "i" }})
 	if err != nil {
         {{- if .HasDefault }}
-        i.log({{ if not .SkipContext }}context.Background(){{else}}ctx{{ end }}, "read [%v]: %v",[]string{ {{- .Keys "i" -}} }, err)
+        i.handle(ctx, err)
         
         {{ .Default "val" -}}
         {{ else }}
@@ -15,15 +15,15 @@ func (i {{.ParentName}}) read{{.FuncName}}(ctx context.Context) (v {{.Type}},e e
 }
 
 // Read{{.FuncName}} {{.Description}}.
-func (i {{.ParentName}}) Read{{.FuncName}}({{if not .SkipContext}} ctx context.Context {{end}}) ({{.Type}}, error) {
-    return i.read{{.FuncName}}({{if .SkipContext}}context.Background(){{else}}ctx{{end}})
+func (i {{.ParentStruct}}) Read{{.FuncName}}({{if not .SkipContext}} ctx context.Context {{end}}) ({{.Type}}, error) {
+    return i.read{{.FuncName}}({{if .SkipContext}}i.ctx{{else}}ctx{{end}})
 }
 
 // {{.FuncName}} {{.Description}}.
-func (i {{.ParentName}}) {{.FuncName}}({{if not .SkipContext}} ctx context.Context {{end}}) {{.Type}} {
-    val, err := i.read{{.FuncName}}({{ if .SkipContext }}context.Background(){{else}}ctx{{ end }})
+func (i {{.ParentStruct}}) {{.FuncName}}({{if not .SkipContext}} ctx context.Context {{end}}) {{.Type}} {
+    val, err := i.read{{.FuncName}}({{ if .SkipContext }}i.ctx{{else}}ctx{{ end }})
 	if err != nil {
-		i.log({{ if .SkipContext }}context.Background(){{else}}ctx{{ end }}, "get [%v]: %v",[]string{ {{- .Keys "i" -}} }, err)
+		i.handle({{ if .SkipContext }}i.ctx{{else}}ctx{{ end }}, err)
 	}
 
 	return val

definition/generate/render/tpl/proto.go.tpl

@@ -1,9 +1,9 @@
 type {{.StructName}} struct {
-    {{.ParentName}}
+    {{.ParentStruct}}
     {{ .Name }} string
 }
 
 // {{.FuncName}} {{.Description}}.
-func (i {{.ParentName}}) {{.FuncName}}(key string) {{.StructName}} {
+func (i {{.ParentStruct}}) {{.FuncName}}(key string) {{.StructName}} {
 	return {{.StructName}}{i,key}
 }

definition/generate/render/value.go

@@ -111,7 +111,7 @@ func dataRender(view ViewData) DataRender {
 		return h
 	}
 
-	if vtype.Kind() != reflect.Interface && vtype.Kind() != reflect.Ptr {
+	if vtype.Kind() != reflect.Interface && vtype.Kind() != reflect.Pointer {
 		vtype = reflect.PointerTo(vtype)
 	}
 

definition/generate/render/value_test.go

@@ -32,12 +32,12 @@ func TestValue_FlagType(t *testing.T) {
 
 	const ex = `pval, perr := val.ParseString()
     if perr != nil {
-        return v, fmt.Errorf("read [%v]:%w",[]string{"flagValue"}, perr)
+        return v, fmt.Errorf("parse [%v]:%w",[]string{"flag_value"}, perr)
     }
 
     return v, v.Set(pval)`
 
-	viewData := render.NewViewData(nil, view.NewView(option.New("flag_value", "flag desc", flagValue(0)), nil))
+	viewData := render.NewViewData(nil, view.NewView(option.New("flag_value", "flag desc", flagValue(0))))
 	result := render.Value("val", "v", viewData)
 
 	if result != ex {
@@ -50,7 +50,7 @@ func TestData_Flag(t *testing.T) {
 
 	const ex = `return {{.val}}, {{.val}}.Set("42")`
 
-	viewData := render.NewViewData(nil, view.NewView(option.New("flag_value", "flag desc", flagValue(0)), nil))
+	viewData := render.NewViewData(nil, view.NewView(option.New("flag_value", "flag desc", flagValue(0))))
 	result := render.Data(flagValue(42), "val", viewData)
 
 	if result != ex {
@@ -78,7 +78,7 @@ func TestValue_Scan(t *testing.T) {
 
 	const ex = `return v, v.Scan(val.Any())`
 
-	viewData := render.NewViewData(nil, view.NewView(option.New("scan_value", "scan desc", scanValue(42)), nil))
+	viewData := render.NewViewData(nil, view.NewView(option.New("scan_value", "scan desc", scanValue(42))))
 	result := render.Value("val", "v", viewData)
 
 	if result != ex {
@@ -102,7 +102,7 @@ func TestData_UnmarshalText(t *testing.T) {
 	const ex = `return {{.val}}, {{.val}}.UnmarshalText("4devs")`
 
 	data := textData("4devs")
-	viewData := render.NewViewData(nil, view.NewView(option.New("tvalue", "unmarshal text desc", textData("")), nil))
+	viewData := render.NewViewData(nil, view.NewView(option.New("tvalue", "unmarshal text desc", textData(""))))
 	result := render.Data(data, "val", viewData)
 
 	if result != ex {
@@ -115,12 +115,12 @@ func TestValue_UnmarshalText(t *testing.T) {
 
 	const ex = `pval, perr := val.ParseString()
     if perr != nil {
-        return v, fmt.Errorf("read [%v]:%w", []string{"tvalue"}, perr)
+        return v, fmt.Errorf("parse [%v]:%w", []string{"tvalue"}, perr)
     }
 
     return v, v.UnmarshalText([]byte(pval))`
 
-	viewData := render.NewViewData(nil, view.NewView(option.New("tvalue", "unmarshal text desc", textData("")), nil))
+	viewData := render.NewViewData(nil, view.NewView(option.New("tvalue", "unmarshal text desc", textData(""))))
 	result := render.Value("val", "v", viewData)
 
 	if result != ex {

definition/generate/tpl/init.go.tpl

@@ -3,6 +3,6 @@ package {{.Pkg}}
 
 import (
     {{range .Imports}}
-    {{- .Alias }} "{{ .Package }}"
+    {{- . }}
     {{end}}
 )

definition/generate/view/view.go

@@ -3,6 +3,7 @@ package view
 import (
 	"fmt"
 	"reflect"
+	"strings"
 
 	"gitoa.ru/go-4devs/config"
 	"gitoa.ru/go-4devs/config/definition/option"
@@ -14,8 +15,29 @@ type key int
 const (
 	viewParamFunctName key = iota + 1
 	viewParamSkipContext
+	viewParamStructName
+	viewParamStructPrefix
+	viewParamStructSuffix
 )
 
+func WithStructName(name string) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, viewParamStructName, name)
+	}
+}
+
+func WithStructPrefix(prefix string) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, viewParamStructPrefix, prefix)
+	}
+}
+
+func WithStructSuffix(suffix string) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, viewParamStructSuffix, suffix)
+	}
+}
+
 func WithSkipContext(p param.Params) param.Params {
 	return param.With(p, viewParamSkipContext, true)
 }
@@ -38,39 +60,27 @@ func IsSkipContext(p param.Params) bool {
 
 type Option func(*View)
 
-func WithParent(name string) Option {
+func WithParent(in *View) Option {
 	return func(v *View) {
-		v.parent = name
+		v.parent = in
 	}
 }
 
-func WithKeys(keys ...string) Option {
-	return func(v *View) {
-		v.keys = keys
-	}
-}
-
-func NewViews(name string, get param.Params, option config.Options, opts ...Option) View {
-	view := newView(name, get, option, opts...)
+func NewViews(option config.Options, opts ...Option) View {
+	view := newView(option, opts...)
 
 	for _, op := range option.Options() {
-		view.children = append(view.children, NewView(op, get, WithParent(name)))
+		view.children = append(view.children, NewView(op, WithParent(&view)))
 	}
 
 	return view
 }
 
-type IOption any
-
-func newView(name string, get param.Params, in any, opts ...Option) View {
+func newView(params param.Params, opts ...Option) View {
 	vi := View{
-		kind:     reflect.TypeOf(in),
-		name:     name,
-		Params:   get,
-		dtype:    param.Type(get),
+		Params:   params,
+		parent:   nil,
 		children: nil,
-		keys:     nil,
-		parent:   "",
 	}
 
 	for _, opt := range opts {
@@ -80,17 +90,12 @@ func newView(name string, get param.Params, in any, opts ...Option) View {
 	return vi
 }
 
-func NewView(opt config.Option, get param.Params, opts ...Option) View {
-	vi := newView(opt.Name(), param.Chain(get, opt), opt, opts...)
+func NewView(opt config.Option, opts ...Option) View {
+	vi := newView(opt, opts...)
 
 	if data, ok := opt.(config.Group); ok {
 		for _, chi := range data.Options() {
-			vi.children = append(vi.children, NewView(
-				chi,
-				param.Chain(vi.Params, chi),
-				WithParent(vi.ParentName()+"_"+opt.Name()),
-				WithKeys(append(vi.keys, opt.Name())...),
-			))
+			vi.children = append(vi.children, NewView(chi, WithParent(&vi)))
 		}
 	}
 
@@ -101,17 +106,13 @@ type View struct {
 	param.Params
 
 	children []View
-	keys     []string
-	kind     reflect.Type
-	name     string
-	parent   string
-	dtype    any
+	parent   *View
 }
 
 func (v View) Types() []any {
 	types := make([]any, 0)
-	if v.dtype != nil {
-		types = append(types, v.dtype)
+	if v.Type() != "" {
+		types = append(types, v.Type())
 	}
 
 	for _, child := range v.children {
@@ -122,7 +123,7 @@ func (v View) Types() []any {
 }
 
 func (v View) Kind() reflect.Type {
-	return v.kind
+	return reflect.TypeOf(v.Params)
 }
 
 func (v View) Views() []View {
@@ -130,32 +131,63 @@ func (v View) Views() []View {
 }
 
 func (v View) Param(key any) string {
-	data, ok := v.Params.Param(key)
-	if !ok {
-		return ""
+	data, has := v.Params.Param(key)
+	if has {
+		return fmt.Sprintf("%v", data)
 	}
 
-	if res, ok := data.(string); ok {
-		return res
+	if v.parent != nil {
+		return v.parent.Param(key)
 	}
 
-	return fmt.Sprintf("%v", data)
+	return ""
+}
+
+func (v View) ClildSkipContext() bool {
+	for _, child := range v.children {
+		if child.SkipContext() {
+			return true
+		}
+	}
+
+	return false
 }
 
 func (v View) SkipContext() bool {
-	return IsSkipContext(v.Params)
+	if IsSkipContext(v.Params) {
+		return true
+	}
+
+	if v.parent != nil {
+		return v.parent.SkipContext()
+	}
+
+	return false
 }
 
 func (v View) Name() string {
-	return v.name
+	if data, ok := v.Params.(interface{ Name() string }); ok {
+		return data.Name()
+	}
+
+	return ""
 }
 
 func (v View) Keys() []string {
-	return v.keys
+	keys := make([]string, 0, 1)
+	if v.parent != nil {
+		keys = append(keys, v.parent.Keys()...)
+	}
+
+	if name := v.Name(); name != "" {
+		keys = append(keys, name)
+	}
+
+	return keys
 }
 
 func (v View) Type() any {
-	return v.dtype
+	return param.Type(v.Params)
 }
 
 func (v View) FuncName() string {
@@ -163,22 +195,49 @@ func (v View) FuncName() string {
 	name, valid := data.(string)
 
 	if !ok || !valid {
-		return v.name
+		return v.Name()
 	}
 
 	return name
 }
 
-func (v View) ParentName() string {
-	return v.parent
+func (v View) StructName() string {
+	name, ok := param.String(v.Params, viewParamStructName)
+	if ok {
+		return name
+	}
+
+	keys := make([]string, 0, len(v.Keys())+2) //nolint:mnd
+
+	prefix := v.Param(viewParamStructPrefix)
+	if prefix != "" {
+		keys = append(keys, prefix)
+	}
+
+	keys = append(keys, v.Keys()...)
+
+	suffix := v.Param(viewParamStructSuffix)
+	if suffix != "" {
+		keys = append(keys, suffix)
+	}
+
+	return strings.Join(keys, "_")
+}
+
+func (v View) ParentStruct() string {
+	if v.parent == nil {
+		return ""
+	}
+
+	return v.parent.StructName()
 }
 
 func (v View) Description() string {
-	return option.DataDescription(v.Params)
+	return param.Description(v.Params)
 }
 
 func (v View) Default() any {
-	data, ok := option.DataDefaut(v.Params)
+	data, ok := param.Default(v.Params)
 	if !ok {
 		return nil
 	}

definition/group/group.go

@@ -2,20 +2,19 @@ package group
 
 import (
 	"gitoa.ru/go-4devs/config"
-	"gitoa.ru/go-4devs/config/definition/option"
 	"gitoa.ru/go-4devs/config/param"
 )
 
 var _ config.Group = New("", "")
 
-func New(name, desc string, opts ...config.Option) Group {
+func New(name, desc string, opts ...config.Option) *Group {
 	group := Group{
 		name:   name,
 		opts:   opts,
-		Params: param.New(option.Description(desc)),
+		Params: param.New(param.WithDescription(desc)),
 	}
 
-	return group
+	return &group
 }
 
 type Group struct {
@@ -25,10 +24,21 @@ type Group struct {
 	opts []config.Option
 }
 
-func (g Group) Name() string {
+func (g *Group) Name() string {
 	return g.name
 }
 
-func (g Group) Options() []config.Option {
+func (g *Group) Options() []config.Option {
 	return g.opts
 }
+
+func (g *Group) Add(opts ...config.Option) {
+	g.opts = append(g.opts, opts...)
+}
+
+func (g *Group) With(opts ...param.Option) *Group {
+	group := New(g.Name(), "")
+	group.Params = param.Chain(g.Params, param.New(opts...))
+
+	return group
+}

definition/group/group_test.go

@@ -0,0 +1,29 @@
+package group_test
+
+import (
+	"testing"
+
+	"gitoa.ru/go-4devs/config/definition/group"
+	"gitoa.ru/go-4devs/config/param"
+	"gitoa.ru/go-4devs/config/test/require"
+)
+
+func TestGroupAdd(t *testing.T) {
+	t.Parallel()
+
+	var gr group.Group
+
+	gr.Add(group.New("test", "test"))
+	require.Truef(t, len(gr.Options()) == 1, "len(%v) != 1", len(gr.Options()))
+}
+
+func TestGroupWith(t *testing.T) {
+	t.Parallel()
+
+	const descrition = "group description"
+
+	gr := group.New("test", "test desc")
+	gr = gr.With(param.WithDescription(descrition))
+
+	require.Equal(t, descrition, param.Description(gr))
+}

definition/option/option.go

@@ -10,7 +10,7 @@ import (
 var _ config.Option = New("", "", nil)
 
 func New(name, desc string, vtype any, opts ...param.Option) Option {
-	opts = append(opts, Description(desc), WithType(vtype))
+	opts = append(opts, param.WithDescription(desc), WithType(vtype))
 	res := Option{
 		name:   name,
 		Params: param.New(opts...),

definition/option/params.go

@@ -8,12 +8,9 @@ type key int
 
 const (
 	paramHidden key = iota + 1
-	paramDefault
-	paramDesc
 	paramRequired
 	paramSlice
 	paramBool
-	paramPos
 	paramShort
 )
 
@@ -49,9 +46,7 @@ func WithType(in any) param.Option {
 }
 
 func Position(pos uint64) param.Option {
-	return func(p param.Params) param.Params {
-		return param.With(p, paramPos, pos)
-	}
+	return param.WithPostition(pos)
 }
 
 func Hidden(v param.Params) param.Params {
@@ -67,31 +62,30 @@ func Slice(v param.Params) param.Params {
 }
 
 func Default(in any) param.Option {
-	return func(v param.Params) param.Params {
-		return param.With(v, paramDefault, in)
-	}
+	return param.WithDefault(in)
 }
 
+// Deprecated: use param.WithDescription.
 func Description(in string) param.Option {
-	return func(v param.Params) param.Params {
-		return param.With(v, paramDesc, in)
-	}
+	return param.WithDescription(in)
 }
 
 func HasDefaut(fn param.Params) bool {
-	_, ok := fn.Param(paramDefault)
+	_, ok := param.Default(fn)
 
 	return ok
 }
 
+// Deprecated: use param.Position.
 func DataPosition(fn param.Params) (uint64, bool) {
-	return param.Uint64(paramPos, fn)
+	pos := param.Position(fn)
+
+	return pos, pos != 0
 }
 
+// Deprecated: use param.Default.
 func DataDefaut(fn param.Params) (any, bool) {
-	data, ok := fn.Param(paramDefault)
-
-	return data, ok
+	return param.Default(fn)
 }
 
 func IsSlice(fn param.Params) bool {
@@ -118,8 +112,7 @@ func IsRequired(fn param.Params) bool {
 	return ok && data
 }
 
+// Deprecated: use param.Description.
 func DataDescription(fn param.Params) string {
-	data, _ := param.String(fn, paramDesc)
-
-	return data
+	return param.Description(fn)
 }

definition/proto/proto.go

@@ -2,7 +2,6 @@ package proto
 
 import (
 	"gitoa.ru/go-4devs/config"
-	"gitoa.ru/go-4devs/config/definition/option"
 	"gitoa.ru/go-4devs/config/key"
 	"gitoa.ru/go-4devs/config/param"
 )
@@ -13,7 +12,7 @@ func New(name string, desc string, opts ...config.Option) Proto {
 	return Proto{
 		name:   key.Wild(name),
 		opts:   opts,
-		Params: param.New(option.Description(desc)),
+		Params: param.New(param.WithDescription(desc)),
 	}
 }
 

factory.go

@@ -10,11 +10,12 @@ import (
 func WrapFactory(fn Factory, prov Provider) *WrapProvider {
 	return &WrapProvider{
 		factory: func(ctx context.Context) (Provider, error) {
-			return fn(ctx, prov)
+			return fn.Create(ctx, prov)
 		},
 		mu:       sync.Mutex{},
 		done:     0,
 		provider: nil,
+		name:     fn.Name(),
 	}
 }
 
@@ -23,6 +24,7 @@ type WrapProvider struct {
 	done     uint32
 	provider Provider
 	factory  func(ctx context.Context) (Provider, error)
+	name     string
 }
 
 func (p *WrapProvider) Watch(ctx context.Context, callback WatchCallback, path ...string) error {
@@ -56,11 +58,7 @@ func (p *WrapProvider) Value(ctx context.Context, path ...string) (Value, error)
 }
 
 func (p *WrapProvider) Name() string {
-	if err := p.init(context.Background()); err != nil {
-		return fmt.Sprintf("%T", p.provider)
-	}
-
-	return p.provider.Name()
+	return p.name
 }
 
 func (p *WrapProvider) Bind(ctx context.Context, data Variables) error {

go.mod

@@ -1,3 +1,5 @@
 module gitoa.ru/go-4devs/config
 
-go 1.23
+go 1.24.0
+
+require gitoa.ru/go-4devs/console v0.2.0

go.sum

@@ -0,0 +1,2 @@
+gitoa.ru/go-4devs/console v0.2.0 h1:6lsbArs99GA8vGdnwNDThZNKjFNctNtTlSCUjhgwIpU=
+gitoa.ru/go-4devs/console v0.2.0/go.mod h1:xi4Svw7T+lylckAQiJQS/2qwDwF4YbIanlhcbQrBAiI=

key/map.go

@@ -6,11 +6,12 @@ import (
 
 const (
 	prefixByPath = "byPath"
+	wrongIDx     = -1
 )
 
 func newMap() *Map {
 	return &Map{
-		idx:      0,
+		idx:      wrongIDx,
 		wild:     nil,
 		children: nil,
 	}
@@ -69,31 +70,30 @@ func (m *Map) add(path []string) *Map {
 }
 
 func (m *Map) byPath(path, sep string) (*Map, bool) {
+	if len(path) == 0 {
+		return m, m.isValid()
+	}
+
 	for name := range m.children {
 		if after, ok := strings.CutPrefix(path, name); ok {
 			data := m.children[name]
-			if len(after) == 0 {
-				return data, true
+			if len(after) == 0 || len(after) == len(sep) {
+				return data, data.isValid()
 			}
 
-			after, ok = strings.CutPrefix(after, sep)
-			if !ok {
-				return data, false
-			}
-
-			if data.wild == nil {
-				return data.byPath(after, sep)
-			}
-
-			if idx := strings.Index(after, sep); idx != -1 {
-				return data.wild.byPath(after[idx+1:], sep)
-			}
-
-			return data, false
+			return data.byPath(after[len(sep):], sep)
 		}
 	}
 
-	return m, false
+	if m.wild == nil {
+		return m, m.isValid()
+	}
+
+	if idx := strings.Index(path, sep); idx != -1 {
+		return m.wild.byPath(path[idx+1:], sep)
+	}
+
+	return m, m.isValid()
 }
 
 func (m *Map) find(path []string) (*Map, bool) {
@@ -104,18 +104,22 @@ func (m *Map) find(path []string) (*Map, bool) {
 		path = path[1:]
 	}
 
-	if m.wild != nil {
+	data, ok := m.children[name]
+	if !ok && m.wild != nil {
 		return m.wild.find(path)
 	}
 
-	data, ok := m.children[name]
 	if !ok {
 		return data, false
 	}
 
 	if last {
-		return data, data.children == nil
+		return data, data.isValid()
 	}
 
 	return data.find(path)
 }
+
+func (m *Map) isValid() bool {
+	return m.idx != wrongIDx
+}

key/map_test.go

@@ -11,26 +11,33 @@ func TestMap_ByPath(t *testing.T) {
 
 	const (
 		expID int = 1
+		othID int = 0
 		newID int = 42
+		grpID int = 27
 	)
 
 	data := key.Map{}
 	data.Add(expID, []string{"test", "data", "three"})
-	data.Add(expID, []string{"test", "other"})
+	data.Add(othID, []string{"test", "other"})
 	data.Add(newID, []string{"new", "{data}", "test"})
+	data.Add(grpID, []string{"new", "group"})
 
 	idx, ok := data.Index(key.ByPath("test-other", "-"))
 	if !ok {
 		t.Error("key not found")
 	}
 
-	if idx != expID {
-		t.Errorf("idx exp:%v got:%v", expID, idx)
+	if idx != othID {
+		t.Errorf("idx exp:%v got:%v", othID, idx)
 	}
 
 	if nidx, nok := data.Index(key.ByPath("new-service-test", "-")); !nok && nidx != newID {
 		t.Errorf("idx exp:%v got:%v", newID, nidx)
 	}
+
+	if gidx, gok := data.Index(key.ByPath("new-group", "-")); !gok && gidx != grpID {
+		t.Errorf("idx %v exp:%v got:%v", gok, grpID, gidx)
+	}
 }
 
 func TestMap_Add(t *testing.T) {
@@ -65,11 +72,13 @@ func TestMap_Wild(t *testing.T) {
 
 	const (
 		expID int = 1
+		grpID int = 27
 		newID int = 42
 	)
 
 	data := key.Map{}
 	data.Add(expID, []string{"test", "{data}", "id"})
+	data.Add(grpID, []string{"test", "group"})
 	data.Add(newID, []string{"new", "data"})
 
 	idx, ok := data.Index([]string{"test", "data", "id"})
@@ -80,4 +89,13 @@ func TestMap_Wild(t *testing.T) {
 	if idx != expID {
 		t.Errorf("idx exp:%v got:%v", expID, idx)
 	}
+
+	gidx, gok := data.Index([]string{"test", "group"})
+	if !gok {
+		t.Error("key not found")
+	}
+
+	if gidx != grpID {
+		t.Errorf("idx exp:%v got:%v", grpID, idx)
+	}
 }

key/wild.go

@@ -1,15 +1,21 @@
 package key
 
+import "slices"
+
 const minWildCount = 3
 
-func IsWild(name string) bool {
+func IsWild(keys ...string) bool {
+	return slices.ContainsFunc(keys, isWild)
+}
+
+func Wild(name string) string {
+	return "{" + name + "}"
+}
+
+func isWild(name string) bool {
 	if len(name) < minWildCount {
 		return false
 	}
 
 	return name[0] == '{' && name[len(name)-1] == '}'
 }
-
-func Wild(name string) string {
-	return "{" + name + "}"
-}

key/wild_test.go

@@ -0,0 +1,16 @@
+package key_test
+
+import (
+	"testing"
+
+	"gitoa.ru/go-4devs/config/key"
+	"gitoa.ru/go-4devs/config/test/require"
+)
+
+func TestWild(t *testing.T) {
+	t.Parallel()
+
+	require.True(t, key.IsWild(key.Wild("test")))
+	require.True(t, !key.IsWild("test"))
+	require.True(t, key.IsWild("test", key.Wild("test"), "key"))
+}

param/helper.go

@@ -11,6 +11,17 @@ func String(fn Params, key any) (string, bool) {
 	return data, ok
 }
 
+func Rune(fn Params, key any) (rune, bool) {
+	val, ok := fn.Param(key)
+	if !ok {
+		return '0', false
+	}
+
+	data, dok := val.(rune)
+
+	return data, dok
+}
+
 func Bool(key any, fn Params) (bool, bool) {
 	val, ok := fn.Param(key)
 	if !ok {

param/keys.go

@@ -5,6 +5,9 @@ type key int
 const (
 	paramTimeFormat key = iota + 1
 	paramType
+	paramDescription
+	paramDefault
+	paramPosition
 )
 
 func WithTimeFormat(format string) Option {
@@ -28,3 +31,39 @@ func Type(fn Params) any {
 
 	return param
 }
+
+func WithDescription(in string) Option {
+	return func(p Params) Params {
+		return With(p, paramDescription, in)
+	}
+}
+
+func Description(fn Params) string {
+	data, _ := String(fn, paramDescription)
+
+	return data
+}
+
+func WithDefault(in any) Option {
+	return func(p Params) Params {
+		return With(p, paramDefault, in)
+	}
+}
+
+func Default(p Params) (any, bool) {
+	data, ok := p.Param(paramDefault)
+
+	return data, ok
+}
+
+func WithPostition(in uint64) Option {
+	return func(p Params) Params {
+		return With(p, paramPosition, in)
+	}
+}
+
+func Position(in Params) uint64 {
+	pos, _ := Uint64(paramPosition, in)
+
+	return pos
+}

processor/csv/processor.go

@@ -0,0 +1,123 @@
+package csv
+
+import (
+	"bytes"
+	"context"
+	"encoding/csv"
+	"fmt"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/param"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+type pkey int
+
+const (
+	paramDelimiter pkey = iota + 1
+	paramParse
+)
+
+const defaultDelimiter = ','
+
+func WithDelimiter(in rune) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, paramDelimiter, in)
+	}
+}
+
+func WithInt(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.Atoi)
+	})
+}
+
+func WithInt64(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseInt64)
+	})
+}
+
+func WithFloat(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseFloat)
+	})
+}
+
+func WithBool(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseBool)
+	})
+}
+
+func WithUint(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseUint)
+	})
+}
+
+func WithUint64(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseUint64)
+	})
+}
+
+func WithDuration(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseDuration)
+	})
+}
+
+func WithTime(p param.Params) param.Params {
+	return param.With(p, paramParse, func(data []string) (config.Value, error) {
+		return value.ParseSlice(data, value.ParseTime)
+	})
+}
+
+func WithParse(fn func(data []string) config.Value) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, paramParse, fn)
+	}
+}
+
+func Csv(_ context.Context, in config.Value, opts ...param.Option) (config.Value, error) {
+	sval, serr := in.ParseString()
+	if serr != nil {
+		return in, nil //nolint:nilerr
+	}
+
+	params := param.New(opts...)
+
+	reader := csv.NewReader(bytes.NewBufferString(sval))
+	reader.Comma = getDelimiter(params)
+
+	data, rerr := reader.Read()
+	if rerr != nil {
+		return nil, fmt.Errorf("read csv:%w", rerr)
+	}
+
+	return csvValue(params, data)
+}
+
+func csvValue(params param.Params, data []string) (config.Value, error) {
+	fn, ok := params.Param(paramParse)
+	if !ok {
+		return stringsValue(data)
+	}
+
+	parse, _ := fn.(func([]string) (config.Value, error))
+
+	return parse(data)
+}
+
+func stringsValue(data []string) (config.Value, error) {
+	return value.New(data), nil
+}
+
+func getDelimiter(params param.Params) rune {
+	if name, ok := param.Rune(params, paramDelimiter); ok {
+		return name
+	}
+
+	return defaultDelimiter
+}

processor/csv/processor_test.go

@@ -0,0 +1,54 @@
+package csv_test
+
+import (
+	"context"
+	"testing"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/processor/csv"
+	"gitoa.ru/go-4devs/config/test/require"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+func TestCsv(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+
+	val := value.String("test2,test3,other")
+
+	data, derr := csv.Csv(ctx, val)
+	require.NoError(t, derr)
+
+	var resString []string
+
+	require.NoError(t, data.Unmarshal(&resString))
+	require.Equal(t, []string{"test2", "test3", "other"}, resString)
+}
+
+func TestCsv_int(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+
+	val := value.String("42,0,1")
+
+	data, derr := csv.Csv(ctx, val, csv.WithInt)
+	require.NoError(t, derr)
+
+	var resInt []int
+
+	require.NoError(t, data.Unmarshal(&resInt))
+	require.Equal(t, []int{42, 0, 1}, resInt)
+}
+
+func TestCsv_invalidValue(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+	val := value.String("42,0.1,1")
+
+	data, derr := csv.Csv(ctx, val, csv.WithInt)
+	require.ErrorIs(t, derr, config.ErrInvalidValue)
+	require.Equal(t, nil, data)
+}

processor/env/processor.go

@@ -0,0 +1,27 @@
+package env
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/param"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+var _ config.ProcessFunc = Env
+
+func Env(_ context.Context, in config.Value, _ ...param.Option) (config.Value, error) {
+	key, err := in.ParseString()
+	if err != nil {
+		return in, fmt.Errorf("process[env]:%w", err)
+	}
+
+	res, ok := os.LookupEnv(key)
+	if !ok {
+		return nil, fmt.Errorf("%w", config.ErrNotFound)
+	}
+
+	return value.String(res), nil
+}

processor/json/processor.go

@@ -0,0 +1,19 @@
+package json //nolint:revive
+
+import (
+	"context"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/param"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+//nolint:revive
+func Json(_ context.Context, in config.Value, _ ...param.Option) (config.Value, error) {
+	data, err := in.ParseString()
+	if err != nil {
+		return in, nil //nolint:nilerr
+	}
+
+	return value.JString(data), nil
+}

processor/json/processor_test.go

@@ -0,0 +1,48 @@
+package json_test
+
+import (
+	"context"
+	"testing"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/processor/json"
+	"gitoa.ru/go-4devs/config/test/require"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+func TestJson(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+	val, err := json.Json(ctx, value.String("42"))
+	require.NoError(t, err)
+
+	var res int
+	require.NoError(t, val.Unmarshal(&res))
+	require.Equal(t, 42, res)
+
+	sval, serr := json.Json(ctx, value.String("\"test data\""))
+	require.NoError(t, serr)
+
+	var sres string
+	require.NoError(t, sval.Unmarshal(&sres))
+	require.Equal(t, "test data", sres)
+
+	slval, slerr := json.Json(ctx, value.String("[\"test\",\"test2 data\",\"test3\"]"))
+	require.NoError(t, slerr)
+
+	var slres []string
+	require.NoError(t, slval.Unmarshal(&slres))
+	require.Equal(t, []string{"test", "test2 data", "test3"}, slres)
+}
+
+func TestJson_invalidValue(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+	val, err := json.Json(ctx, value.New("42"))
+	require.NoError(t, err)
+
+	var data string
+	require.ErrorIs(t, val.Unmarshal(&data), config.ErrInvalidValue)
+}

processor/key/processor.go

@@ -0,0 +1,49 @@
+package key
+
+import (
+	"context"
+	"fmt"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/param"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+type pkey int
+
+const paramKey pkey = iota
+
+func WithKey(in string) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, paramKey, in)
+	}
+}
+
+func Key(_ context.Context, in config.Value, opts ...param.Option) (config.Value, error) {
+	data := make(map[string]any, 0)
+	if err := in.Unmarshal(&data); err != nil {
+		return nil, fmt.Errorf("unmarshal:%w", err)
+	}
+
+	key, ok := getKey(opts...)
+	if !ok {
+		return nil, fmt.Errorf("key is %w", config.ErrRequired)
+	}
+
+	val, vok := data[key]
+	if !vok {
+		return nil, fmt.Errorf("value by key[%v]: %w", key, config.ErrNotFound)
+	}
+
+	return value.New(val), nil
+}
+
+func getKey(opts ...param.Option) (string, bool) {
+	params := param.New(opts...)
+
+	if name, ok := param.String(params, paramKey); ok {
+		return name, ok
+	}
+
+	return "", false
+}

processor/key/processor_test.go

@@ -0,0 +1,58 @@
+package key_test
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/processor/key"
+	"gitoa.ru/go-4devs/config/test/require"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+func TestKey(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+
+	res, rerr := key.Key(ctx, keyData(t), key.WithKey("key"))
+	require.NoError(t, rerr)
+
+	require.Equal(t, "value", res.String())
+}
+
+func TestKey_required(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+
+	res, rerr := key.Key(ctx, keyData(t))
+	require.ErrorIs(t, rerr, config.ErrRequired)
+
+	require.Equal(t, res, nil)
+}
+
+func TestKey_notFound(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+
+	res, rerr := key.Key(ctx, keyData(t), key.WithKey("wrong"))
+	require.ErrorIs(t, rerr, config.ErrNotFound)
+
+	require.Equal(t, res, nil)
+}
+
+func keyData(t *testing.T) config.Value {
+	t.Helper()
+
+	data := map[string]string{
+		"key": "value",
+	}
+
+	jdata, err := json.Marshal(data)
+	require.NoError(t, err)
+
+	return value.JBytes(jdata)
+}

provider.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"context"
+	"io"
 
 	"gitoa.ru/go-4devs/config/param"
 )
@@ -17,7 +18,10 @@ type WatchProvider interface {
 	Watch(ctx context.Context, callback WatchCallback, path ...string) error
 }
 
-type Factory func(ctx context.Context, cfg Provider) (Provider, error)
+type Factory interface {
+	Name() string
+	Create(ctx context.Context, prov Provider) (Provider, error)
+}
 
 type Option interface {
 	Name() string
@@ -31,6 +35,7 @@ type Group interface {
 
 type Options interface {
 	Options() []Option
+	param.Params
 }
 
 type BindProvider interface {
@@ -39,6 +44,19 @@ type BindProvider interface {
 	Bind(ctx context.Context, data Variables) error
 }
 
+type DunpProvider interface {
+	Provider
+
+	DumpRefernce(ctx context.Context, w io.Writer, opts Options) error
+}
+
+type Providers interface {
+	Provider
+
+	Provider(name string) (Provider, error)
+	Names() []string
+}
+
 type Variables interface {
 	ByName(name ...string) (Variable, error)
 	ByParam(filter param.Has) (Variable, error)
@@ -48,3 +66,13 @@ type Variables interface {
 type Definition interface {
 	Add(opts ...Option)
 }
+
+type ProcessFunc func(ctx context.Context, in Value, opts ...param.Option) (Value, error)
+
+func (o ProcessFunc) Process(ctx context.Context, in Value, opts ...param.Option) (Value, error) {
+	return o(ctx, in, opts...)
+}
+
+type Processor interface {
+	Process(ctx context.Context, in Value, opts ...param.Option) (Value, error)
+}

provider/arg/dump.go

@@ -0,0 +1,419 @@
+package arg
+
+import (
+	"bytes"
+	"encoding"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"sort"
+	"strings"
+	"time"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition/option"
+	"gitoa.ru/go-4devs/config/param"
+)
+
+const (
+	defaultSpace = 2
+)
+
+func ResolveStyle(params param.Params) ViewStyle {
+	var vs ViewStyle
+
+	data, ok := params.Param(paramDumpReferenceView)
+	if ok {
+		vs, _ = data.(ViewStyle)
+	}
+
+	return vs
+}
+
+func WithStyle(comment, info Style) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, paramDumpReferenceView, ViewStyle{
+			Comment: comment,
+			Info:    info,
+			MLen:    0,
+		})
+	}
+}
+
+type ViewStyle struct {
+	Comment Style
+	Info    Style
+	MLen    int
+}
+
+func (v ViewStyle) ILen() int {
+	return v.Info.Len() + v.MLen
+}
+
+type Style struct {
+	Start string
+	End   string
+}
+
+func (s Style) Len() int {
+	return len(s.End) + len(s.Start)
+}
+
+func NewDump() Dump {
+	return Dump{
+		sep:   dash,
+		space: defaultSpace,
+	}
+}
+
+type Dump struct {
+	sep   string
+	space int
+}
+
+func (d Dump) Reference(w io.Writer, opt config.Options) error {
+	views := NewViews(opt, nil)
+	style := ResolveStyle(opt)
+	style.MLen = d.keyMaxLen(views...)
+
+	if args := views.Arguments(); len(args) > 0 {
+		if aerr := d.writeArguments(w, style, args...); aerr != nil {
+			return fmt.Errorf("write arguments:%w", aerr)
+		}
+	}
+
+	if opts := views.Options(); len(opts) > 0 {
+		if oerr := d.writeOptions(w, style, opts...); oerr != nil {
+			return fmt.Errorf("write option:%w", oerr)
+		}
+	}
+
+	return nil
+}
+
+//nolint:mnd
+func (d Dump) keyMaxLen(views ...View) int {
+	var maxLen int
+
+	for _, vi := range views {
+		vlen := len(vi.Name(d.sep)) + d.space
+
+		if !vi.IsArgument() {
+			if !vi.IsBool() {
+				vlen = vlen*2 + 1
+			}
+
+			if def := vi.Default(); def != "" {
+				vlen += d.space
+			}
+
+			vlen += 4 + d.space
+		}
+
+		if vlen > maxLen {
+			maxLen = vlen
+		}
+	}
+
+	return maxLen
+}
+
+func (d Dump) writeArguments(w io.Writer, style ViewStyle, args ...View) error {
+	_, err := fmt.Fprintf(w, "\n%sArguments:%s\n",
+		style.Comment.Start,
+		style.Comment.End,
+	)
+
+	for _, arg := range args {
+		alen, ierr := fmt.Fprintf(w, "%s%s%s%s",
+			strings.Repeat(" ", d.space),
+			style.Info.Start,
+			arg.Name(d.sep),
+			style.Info.End,
+		)
+		if ierr != nil {
+			err = errors.Join(err, ierr)
+		}
+
+		_, ierr = fmt.Fprint(w, strings.Repeat(" ", style.ILen()+d.space-alen))
+		if ierr != nil {
+			err = errors.Join(err, ierr)
+		}
+
+		_, ierr = fmt.Fprint(w, arg.Description())
+		if ierr != nil {
+			err = errors.Join(err, ierr)
+		}
+
+		if def := arg.Default(); def != "" {
+			ierr := d.writeDefault(w, style, def)
+			if ierr != nil {
+				err = errors.Join(err, ierr)
+			}
+		}
+
+		_, ierr = fmt.Fprint(w, "\n")
+		if ierr != nil {
+			err = errors.Join(err, ierr)
+		}
+	}
+
+	if err != nil {
+		return fmt.Errorf("%w", err)
+	}
+
+	return nil
+}
+
+//nolint:gocognit,gocyclo,cyclop
+func (d Dump) writeOptions(w io.Writer, style ViewStyle, opts ...View) error {
+	_, err := fmt.Fprintf(w, "\n%sOptions:%s\n",
+		style.Comment.Start,
+		style.Comment.End,
+	)
+
+	for _, opt := range opts {
+		if opt.IsHidden() {
+			continue
+		}
+
+		var op bytes.Buffer
+
+		_, oerr := fmt.Fprintf(&op, "%s%s", strings.Repeat(" ", d.space), style.Info.Start)
+		if oerr != nil {
+			err = errors.Join(err, oerr)
+		}
+
+		if short := opt.Short(); short != "" {
+			op.WriteString("-")
+			op.WriteString(short)
+			op.WriteString(", ")
+		} else {
+			op.WriteString("    ")
+		}
+
+		op.WriteString("--")
+		op.WriteString(opt.Name(d.sep))
+
+		if !opt.IsBool() {
+			if !opt.IsRequired() {
+				op.WriteString("[")
+			}
+
+			op.WriteString("=")
+			op.WriteString(strings.ToUpper(opt.Name(d.sep)))
+
+			if !opt.IsRequired() {
+				op.WriteString("]")
+			}
+		}
+
+		_, oerr = fmt.Fprintf(&op, "%s", style.Info.End)
+		if oerr != nil {
+			err = errors.Join(err, oerr)
+		}
+
+		olen, oerr := w.Write(op.Bytes())
+		if oerr != nil {
+			err = errors.Join(err, oerr)
+		}
+
+		_, oerr = fmt.Fprintf(w, "%s%s",
+			strings.Repeat(" ", style.ILen()+d.space-olen),
+			opt.Description(),
+		)
+		if oerr != nil {
+			err = errors.Join(err, oerr)
+		}
+
+		if def := opt.Default(); def != "" {
+			oerr = d.writeDefault(w, style, def)
+			if oerr != nil {
+				err = errors.Join(err, oerr)
+			}
+		}
+
+		if opt.IsSlice() {
+			_, oerr = fmt.Fprintf(w, "%s  (multiple values allowed)%s", style.Comment.Start, style.Comment.End)
+			if oerr != nil {
+				err = errors.Join(err, oerr)
+			}
+		}
+
+		_, oerr = fmt.Fprint(w, "\n")
+		if oerr != nil {
+			err = errors.Join(err, oerr)
+		}
+	}
+
+	if err != nil {
+		return fmt.Errorf("write options:%w", err)
+	}
+
+	return nil
+}
+
+func (d Dump) writeDefault(w io.Writer, style ViewStyle, data string) error {
+	_, err := fmt.Fprintf(w, " %s[default:%s]%s",
+		style.Comment.Start,
+		data,
+		style.Comment.End,
+	)
+	if err != nil {
+		return fmt.Errorf("default:%w", err)
+	}
+
+	return nil
+}
+
+func NewViews(opts config.Options, parent *View) Views {
+	views := make(Views, 0, len(opts.Options()))
+	for _, opt := range opts.Options() {
+		views = append(views, newViews(opt, parent)...)
+	}
+
+	return views
+}
+
+func newViews(opt config.Option, parent *View) []View {
+	view := NewView(opt, parent)
+	switch one := opt.(type) {
+	case config.Group:
+		return NewViews(one, &view)
+	default:
+		return []View{view}
+	}
+}
+
+type Views []View
+
+func (v Views) Arguments() []View {
+	args := make([]View, 0, len(v))
+
+	for _, view := range v {
+		if view.IsArgument() {
+			args = append(args, view)
+		}
+	}
+
+	sort.Slice(args, func(i, j int) bool {
+		return args[i].Pos() < args[j].Pos()
+	})
+
+	return args
+}
+
+func (v Views) Options() []View {
+	opts := make([]View, 0, len(v))
+
+	for _, view := range v {
+		if !view.IsArgument() {
+			opts = append(opts, view)
+		}
+	}
+
+	sort.Slice(opts, func(i, j int) bool {
+		return opts[i].Pos() < opts[j].Pos()
+	})
+
+	return opts
+}
+
+func NewView(params config.Option, parent *View) View {
+	pos, ok := ParamArgument(params)
+
+	keys := make([]string, 0)
+	if parent != nil {
+		keys = append(keys, parent.Keys()...)
+	}
+
+	if !ok {
+		pos = param.Position(params)
+	}
+
+	if name := params.Name(); name != "" {
+		keys = append(keys, name)
+	}
+
+	return View{
+		pos:        pos,
+		isArgument: ok,
+		keys:       keys,
+		parent:     parent,
+		Params:     params,
+	}
+}
+
+type View struct {
+	param.Params
+
+	keys       []string
+	pos        uint64
+	isArgument bool
+	parent     *View
+}
+
+func (v View) Name(delimiter string) string {
+	return strings.Join(v.keys, delimiter)
+}
+
+func (v View) IsArgument() bool {
+	return v.isArgument
+}
+
+func (v View) Keys() []string {
+	return v.keys
+}
+
+func (v View) Pos() uint64 {
+	return v.pos
+}
+
+func (v View) Default() string {
+	data, ok := param.Default(v.Params)
+	if !ok {
+		return ""
+	}
+
+	switch dt := data.(type) {
+	case time.Time:
+		return dt.Format(time.RFC3339)
+	case encoding.TextMarshaler:
+		if res, err := dt.MarshalText(); err == nil {
+			return string(res)
+		}
+	case json.Marshaler:
+		if res, err := dt.MarshalJSON(); err == nil {
+			return string(res)
+		}
+	}
+
+	return fmt.Sprintf("%v", data)
+}
+
+func (v View) Description() string {
+	return param.Description(v.Params)
+}
+
+func (v View) IsHidden() bool {
+	return option.IsHidden(v.Params)
+}
+
+func (v View) Short() string {
+	short, _ := option.ParamShort(v.Params)
+
+	return short
+}
+
+func (v View) IsRequired() bool {
+	return option.IsHidden(v.Params)
+}
+
+func (v View) IsBool() bool {
+	return option.IsBool(v.Params)
+}
+
+func (v View) IsSlice() bool {
+	return option.IsSlice(v.Params)
+}

provider/arg/dump_test.go

@@ -0,0 +1,35 @@
+package arg_test
+
+import (
+	"bytes"
+	"testing"
+
+	"gitoa.ru/go-4devs/config/provider/arg"
+	"gitoa.ru/go-4devs/config/test/require"
+)
+
+func TestDumpReference(t *testing.T) {
+	t.Parallel()
+
+	//nolint:dupword
+	const expect = `
+Arguments:
+  config                                           config [default:config.hcl]
+  user-name                                        username
+
+Options:
+  -l, --listen[=LISTEN]                            listen [default:8080]
+  -p, --user-password[=USER-PASSWORD]              user pass
+  -u, --url[=URL]                                  url  (multiple values allowed)
+  -t, --timeout[=TIMEOUT]                          timeout  (multiple values allowed)
+      --start-at[=START-AT]                        start at [default:2010-01-02T15:04:05Z]
+      --end-after[=END-AFTER]                      after  (multiple values allowed)
+      --end-{service}-after[=END-{SERVICE}-AFTER]  after
+`
+
+	dump := arg.NewDump()
+
+	var buff bytes.Buffer
+	require.NoError(t, dump.Reference(&buff, testOptions(t)))
+	require.Equal(t, expect, buff.String())
+}

provider/arg/helper_test.go

@@ -0,0 +1,38 @@
+package arg_test
+
+import (
+	"testing"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition"
+	"gitoa.ru/go-4devs/config/definition/group"
+	"gitoa.ru/go-4devs/config/definition/option"
+	"gitoa.ru/go-4devs/config/definition/proto"
+	"gitoa.ru/go-4devs/config/provider/arg"
+	"gitoa.ru/go-4devs/config/test"
+)
+
+func testOptions(t *testing.T) config.Options {
+	t.Helper()
+
+	def := definition.New()
+	def.Add(
+		option.Int("listen", "listen", option.Short('l'), option.Default(8080)),
+		option.String("config", "config", arg.Argument, option.Default("config.hcl")),
+		group.New("user", "configure user",
+			option.String("name", "username", arg.Argument),
+			option.String("password", "user pass", option.Short('p')),
+		),
+		option.String("url", "url", option.Short('u'), option.Slice),
+		option.Duration("timeout", "timeout", option.Short('t'), option.Slice),
+		option.Time("start-at", "start at", option.Default(test.Time("2010-01-02T15:04:05Z"))),
+		group.New("end", "end at",
+			option.Time("after", "after", option.Slice),
+			proto.New("service", "service after",
+				option.Time("after", "after"),
+			),
+		),
+	)
+
+	return def
+}

provider/arg/param.go

@@ -10,13 +10,14 @@ type keyParam int
 
 const (
 	paramArgument keyParam = iota + 1
+	paramDumpReferenceView
 )
 
 //nolint:gochecknoglobals
 var argNum uint64
 
 func Argument(v param.Params) param.Params {
-	return param.With(v, paramArgument, atomic.AddUint64(&argNum, 1))
+	return param.With(v, paramArgument, atomic.AddUint64(&argNum, 1)-1)
 }
 
 func ParamArgument(fn param.Params) (uint64, bool) {

provider/arg/provider.go

@@ -3,6 +3,7 @@ package arg
 import (
 	"context"
 	"fmt"
+	"io"
 	"os"
 	"strings"
 
@@ -19,6 +20,7 @@ const (
 	dash                 = `-`
 )
 
+// Deprecated: use WithArgs.
 func WithSkip(skip int) func(*Argv) {
 	return func(ar *Argv) {
 		res := 2
@@ -34,24 +36,27 @@ func WithSkip(skip int) func(*Argv) {
 			res = 1
 		}
 
-		ar.skip = res
+		ar.args = os.Args[res:]
+	}
+}
+
+func WithArgs(args []string) func(*Argv) {
+	return func(a *Argv) {
+		a.args = args
 	}
 }
 
 func New(opts ...func(*Argv)) *Argv {
 	arg := &Argv{
-		args: nil,
+		args: os.Args[1:],
 		pos:  0,
 		Map:  memory.Map{},
-		skip: 1,
 	}
 
 	for _, opt := range opts {
 		opt(arg)
 	}
 
-	arg.args = os.Args[arg.skip:]
-
 	return arg
 }
 
@@ -60,7 +65,6 @@ type Argv struct {
 
 	args []string
 	pos  uint64
-	skip int
 }
 
 func (i *Argv) Value(ctx context.Context, key ...string) (config.Value, error) {
@@ -70,7 +74,7 @@ func (i *Argv) Value(ctx context.Context, key ...string) (config.Value, error) {
 
 	data, err := i.Map.Value(ctx, key...)
 	if err != nil {
-		return nil, fmt.Errorf("%w", err)
+		return nil, fmt.Errorf("map: %w", err)
 	}
 
 	return data, nil
@@ -101,17 +105,21 @@ func (i *Argv) Bind(ctx context.Context, def config.Variables) error {
 		}
 
 		if err != nil {
-			return fmt.Errorf("%w", err)
+			return fmt.Errorf("arg bind:%w", err)
 		}
 	}
 
 	if err := i.Map.Bind(ctx, def); err != nil {
-		return fmt.Errorf("%w", err)
+		return fmt.Errorf("arg map:%w", err)
 	}
 
 	return nil
 }
 
+func (i *Argv) DumpRefernce(_ context.Context, w io.Writer, opt config.Options) error {
+	return NewDump().Reference(w, opt)
+}
+
 func (i *Argv) parseLongOption(arg string, def config.Variables) error {
 	var value *string
 
@@ -164,7 +172,7 @@ func (i *Argv) parseShortOption(arg string, def config.Variables) error {
 	var value string
 
 	if len(name) > 1 {
-		name, value = arg[0:1], arg[1:]
+		name, value = arg[0:1], strings.TrimSpace(arg[1:])
 	}
 
 	opt, err := def.ByParam(option.HasShort(name))

provider/arg/provider_test.go

@@ -1,27 +1,22 @@
 package arg_test
 
 import (
+	"context"
 	"fmt"
-	"os"
 	"strings"
 	"testing"
 	"time"
 
+	"gitoa.ru/go-4devs/config"
 	"gitoa.ru/go-4devs/config/provider/arg"
 	"gitoa.ru/go-4devs/config/test"
+	"gitoa.ru/go-4devs/config/test/require"
 )
 
 func TestProvider(t *testing.T) {
 	t.Parallel()
 
-	args := os.Args
-
-	defer func() {
-		os.Args = args
-	}()
-
-	os.Args = []string{
-		"main.go",
+	args := []string{
 		"--listen=8080",
 		"--config=config.hcl",
 		"--url=http://4devs.io",
@@ -44,11 +39,50 @@ func TestProvider(t *testing.T) {
 		}, &[]time.Time{}, "end-after"),
 	}
 
-	prov := arg.New()
+	prov := arg.New(arg.WithArgs(args))
 
 	test.Run(t, prov, read)
 }
 
+func TestProviderBind(t *testing.T) {
+	t.Parallel()
+
+	args := []string{
+		"-l 8080",
+		"--config=config.hcl",
+		"-u http://4devs.io",
+		"--url=https://4devs.io",
+		"-t 1m",
+		"--timeout=1h",
+		"--start-at=2010-01-02T15:04:05Z",
+		"--end-after=2009-01-02T15:04:05Z",
+		"--end-after=2008-01-02T15:04:05+03:00",
+	}
+
+	read := []test.Read{
+		test.NewRead(8080, "listen"),
+		test.NewRead(test.Time("2010-01-02T15:04:05Z"), "start-at"),
+		test.NewReadUnmarshal(&[]string{"http://4devs.io", "https://4devs.io"}, &[]string{}, "url"),
+		test.NewReadUnmarshal(&[]Duration{{time.Minute}, {time.Hour}}, &[]Duration{}, "timeout"),
+		test.NewReadUnmarshal(&[]time.Time{
+			test.Time("2009-01-02T15:04:05Z"),
+			test.Time("2008-01-02T15:04:05+03:00"),
+		}, &[]time.Time{}, "end", "after"),
+	}
+
+	ctx := context.Background()
+	prov := arg.New(arg.WithArgs(args))
+	require.NoError(t, prov.Bind(ctx, testVariables(t)))
+
+	test.Run(t, prov, read)
+}
+
+func testVariables(t *testing.T) config.Variables {
+	t.Helper()
+
+	return config.NewVars(testOptions(t).Options()...)
+}
+
 type Duration struct {
 	time.Duration
 }

provider/chain/chain.go

@@ -9,7 +9,12 @@ import (
 
 const Name = "chain"
 
-func New(c ...config.Provider) config.BindProvider {
+type Providers interface {
+	config.BindProvider
+	config.Providers
+}
+
+func New(c ...config.Provider) Providers {
 	return chain(c)
 }
 
@@ -40,3 +45,39 @@ func (c chain) Bind(ctx context.Context, def config.Variables) error {
 func (c chain) Name() string {
 	return Name
 }
+
+func (c chain) Provider(name string) (config.Provider, error) {
+	if c.Name() == name {
+		return c, nil
+	}
+
+	for _, prov := range c {
+		if prov.Name() == name {
+			return prov, nil
+		}
+
+		cprov, ok := prov.(config.Providers)
+		if !ok {
+			continue
+		}
+
+		if in, err := cprov.Provider(name); err == nil {
+			return in, nil
+		}
+	}
+
+	return nil, fmt.Errorf("prov[%v]:%w", c.Name(), config.ErrNotFound)
+}
+
+func (c chain) Names() []string {
+	names := make([]string, 0, len(c))
+	for _, prov := range c {
+		names = append(names, prov.Name())
+
+		if cprov, ok := prov.(config.Providers); ok {
+			names = append(names, cprov.Names()...)
+		}
+	}
+
+	return names
+}

provider/dasel/go.mod

@@ -0,0 +1,21 @@
+module gitoa.ru/go-4devs/config/provider/dasel
+
+go 1.25.5
+
+require (
+	github.com/tomwright/dasel/v3 v3.2.0
+	gitoa.ru/go-4devs/config v0.0.6
+)
+
+require (
+	github.com/agext/levenshtein v1.2.1 // indirect
+	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
+	github.com/google/go-cmp v0.7.0 // indirect
+	github.com/hashicorp/hcl/v2 v2.24.0 // indirect
+	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
+	github.com/zclconf/go-cty v1.17.0 // indirect
+	golang.org/x/mod v0.26.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
+	golang.org/x/tools v0.35.0 // indirect
+)

provider/dasel/go.sum

@@ -0,0 +1,30 @@
+github.com/agext/levenshtein v1.2.1 h1:QmvMAjj2aEICytGiWzmxoE0x2KZvE0fvmqMOfy2tjT8=
+github.com/agext/levenshtein v1.2.1/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=
+github.com/apparentlymart/go-textseg/v15 v15.0.0 h1:uYvfpb3DyLSCGWnctWKGj857c6ew1u1fNQOlOtuGxQY=
+github.com/apparentlymart/go-textseg/v15 v15.0.0/go.mod h1:K8XmNZdhEBkdlyDdvbmmsvpAG721bKi0joRfFdHIWJ4=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-test/deep v1.0.3 h1:ZrJSEWsXzPOxaZnFteGEfooLba+ju3FYIbOrS+rQd68=
+github.com/go-test/deep v1.0.3/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/hashicorp/hcl/v2 v2.24.0 h1:2QJdZ454DSsYGoaE6QheQZjtKZSUs9Nh2izTWiwQxvE=
+github.com/hashicorp/hcl/v2 v2.24.0/go.mod h1:oGoO1FIQYfn/AgyOhlg9qLC6/nOJPX3qGbkZpYAcqfM=
+github.com/mitchellh/go-wordwrap v1.0.1 h1:TLuKupo69TCn6TQSyGxwI1EblZZEsQ0vMlAFQflz0v0=
+github.com/mitchellh/go-wordwrap v1.0.1/go.mod h1:R62XHJLzvMFRBbcrT7m7WgmE1eOyTSsCt+hzestvNj0=
+github.com/tomwright/dasel/v3 v3.2.0 h1:wyF2A4jVADx10E0kjbzPTiaF26D0OkK2OPuQRPJRDCo=
+github.com/tomwright/dasel/v3 v3.2.0/go.mod h1:XyAl6LidZuWOISIeUmKlCqJDz4IWEDp83epNngZgOQA=
+github.com/zclconf/go-cty v1.17.0 h1:seZvECve6XX4tmnvRzWtJNHdscMtYEx5R7bnnVyd/d0=
+github.com/zclconf/go-cty v1.17.0/go.mod h1:wqFzcImaLTI6A5HfsRwB0nj5n0MRZFwmey8YoFPPs3U=
+github.com/zclconf/go-cty-debug v0.0.0-20240509010212-0d6042c53940 h1:4r45xpDWB6ZMSMNJFMOjqrGHynW3DIBuR2H9j0ug+Mo=
+github.com/zclconf/go-cty-debug v0.0.0-20240509010212-0d6042c53940/go.mod h1:CmBdvvj3nqzfzJ6nTCIwDTPZ56aVGvDrmztiO5g3qrM=
+gitoa.ru/go-4devs/config v0.0.6 h1:BbOH2KHBRMWtSwcFyHKzMXzxYbJpSwZpA8LGnnzBwk8=
+gitoa.ru/go-4devs/config v0.0.6/go.mod h1:UINWnObZA0nLiJro+TtavUBBvN0cSt17aRHOk20pP74=
+golang.org/x/mod v0.26.0 h1:EGMPT//Ezu+ylkCijjPc+f4Aih7sZvaAr+O3EHBxvZg=
+golang.org/x/mod v0.26.0/go.mod h1:/j6NAhSk8iQ723BGAUyoAcn7SlD7s15Dp9Nd/SfeaFQ=
+golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
+golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
+golang.org/x/tools v0.35.0 h1:mBffYraMEf7aa0sB+NuKnuCy8qI/9Bughn8dC2Gu5r0=
+golang.org/x/tools v0.35.0/go.mod h1:NKdj5HkL/73byiZSJjqJgKn3ep7KjFkBOkR/Hps3VPw=

provider/dasel/hcl/fixture/config.hcl

@@ -0,0 +1,18 @@
+app {
+  name {
+    var = [
+      "name"
+    ]
+
+    title = "config title"
+    timeout = "1m"
+    success = true
+  }
+
+}
+
+cfg {
+  duration = 1260000000000
+  enabled = true
+  type = "json"
+}

provider/dasel/hcl/provider.go

@@ -0,0 +1,13 @@
+package hcl
+
+import (
+	"github.com/tomwright/dasel/v3/parsing/hcl"
+	"gitoa.ru/go-4devs/config/provider/dasel"
+)
+
+const Name = "dasel:hcl"
+
+//nolint:wrapcheck
+func New(data []byte) (dasel.Provider, error) {
+	return dasel.New(data, hcl.HCL, dasel.WithName(Name))
+}

provider/dasel/hcl/provider_test.go

@@ -0,0 +1,35 @@
+package hcl_test
+
+import (
+	"embed"
+	"testing"
+	"time"
+
+	dhcl "gitoa.ru/go-4devs/config/provider/dasel/hcl"
+	"gitoa.ru/go-4devs/config/test"
+	"gitoa.ru/go-4devs/config/test/require"
+)
+
+//go:embed fixture/*
+var fixture embed.FS
+
+func TestProvider(t *testing.T) {
+	t.Parallel()
+
+	js, err := fixture.ReadFile("fixture/config.hcl")
+	require.NoError(t, err)
+
+	prov, derr := dhcl.New(js)
+	require.NoError(t, derr)
+
+	sl := []string{}
+	read := []test.Read{
+		test.NewRead("config title", "app", "name", "title"),
+		test.NewRead(time.Minute, "app.name.timeout"),
+		test.NewReadUnmarshal(&[]string{"name"}, &sl, "app.name.var"),
+		test.NewReadConfig("cfg"),
+		test.NewRead(true, "app", "name", "success"),
+	}
+
+	test.Run(t, prov, read)
+}

provider/dasel/json/fixture/config.json

@@ -0,0 +1,17 @@
+{
+    "app": {
+        "name": {
+            "var": [
+                "name"
+            ],
+            "title": "config title",
+            "timeout": "1m",
+            "success": true
+        }
+    },
+    "cfg": {
+        "duration": 1260000000000,
+        "enabled": true,
+        "type":"json"
+    }
+}

provider/dasel/json/provider.go

@@ -0,0 +1,13 @@
+package json //nolint:revive
+
+import (
+	"github.com/tomwright/dasel/v3/parsing/json"
+	"gitoa.ru/go-4devs/config/provider/dasel"
+)
+
+const Name = "dasel:json"
+
+//nolint:wrapcheck
+func New(data []byte) (dasel.Provider, error) {
+	return dasel.New(data, json.JSON, dasel.WithName(Name))
+}

provider/dasel/json/provider_test.go

@@ -0,0 +1,35 @@
+package json_test
+
+import (
+	"embed"
+	"testing"
+	"time"
+
+	djson "gitoa.ru/go-4devs/config/provider/dasel/json"
+	"gitoa.ru/go-4devs/config/test"
+	"gitoa.ru/go-4devs/config/test/require"
+)
+
+//go:embed fixture/*
+var fixture embed.FS
+
+func TestProvider(t *testing.T) {
+	t.Parallel()
+
+	js, err := fixture.ReadFile("fixture/config.json")
+	require.NoError(t, err)
+
+	prov, derr := djson.New(js)
+	require.NoError(t, derr)
+
+	sl := []string{}
+	read := []test.Read{
+		test.NewRead("config title", "app.name.title"),
+		test.NewRead(time.Minute, "app.name.timeout"),
+		test.NewReadUnmarshal(&[]string{"name"}, &sl, "app.name.var"),
+		test.NewReadConfig("cfg"),
+		test.NewRead(true, "app", "name", "success"),
+	}
+
+	test.Run(t, prov, read)
+}

provider/dasel/provider.go

@@ -0,0 +1,91 @@
+package dasel
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	dasel "github.com/tomwright/dasel/v3"
+	"github.com/tomwright/dasel/v3/model"
+	"github.com/tomwright/dasel/v3/parsing"
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+var _ config.Provider = Provider{} //nolint:exhaustruct
+
+const Name = "dasel"
+
+type Option func(*Provider)
+
+func WithName(in string) Option {
+	return func(p *Provider) {
+		p.name = in
+	}
+}
+
+func New(in []byte, format parsing.Format, opts ...Option) (Provider, error) {
+	reader, err := format.NewReader(parsing.DefaultReaderOptions())
+	if err != nil {
+		return Provider{}, fmt.Errorf("%w:%w", config.ErrInitFactory, err)
+	}
+
+	data, verr := reader.Read(in)
+	if verr != nil {
+		return Provider{}, fmt.Errorf("%w:%w", config.ErrInitFactory, verr)
+	}
+
+	prov := Provider{
+		data: data,
+		key: func(path ...string) string {
+			return strings.Join(path, ".")
+		},
+		name: Name,
+	}
+
+	for _, opt := range opts {
+		opt(&prov)
+	}
+
+	return prov, nil
+}
+
+type Provider struct {
+	data *model.Value
+	key  func(path ...string) string
+	name string
+}
+
+func (p Provider) Value(ctx context.Context, path ...string) (config.Value, error) {
+	selector := p.key(path...)
+
+	data, cnt, err := dasel.Query(ctx, p.data, selector)
+	if err != nil {
+		return nil, fmt.Errorf("query: %w:%w", config.ErrInvalidValue, err)
+	}
+
+	if cnt > 1 {
+		return nil, fmt.Errorf("count: %v:%w", cnt, config.ErrToManyArgs)
+	}
+
+	if cnt == 0 {
+		return value.EmptyValue(), nil
+	}
+
+	val, verr := data[0].GoValue()
+	if verr != nil {
+		return nil, fmt.Errorf("go value: %w:%w", config.ErrInvalidValue, verr)
+	}
+
+	res, merr := json.Marshal(val)
+	if merr != nil {
+		return nil, fmt.Errorf("marshal: %w:%w", config.ErrInvalidValue, merr)
+	}
+
+	return value.JBytes(res), nil
+}
+
+func (p Provider) Name() string {
+	return p.name
+}

provider/env/provider.go

@@ -3,10 +3,13 @@ package env
 import (
 	"context"
 	"fmt"
+	"io"
 	"os"
 	"strings"
 
 	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/key"
+	"gitoa.ru/go-4devs/config/param"
 	"gitoa.ru/go-4devs/config/value"
 )
 
@@ -42,15 +45,68 @@ type Provider struct {
 	prefix string
 }
 
+func (p *Provider) Key(path ...string) string {
+	return p.prefix + p.key(path...)
+}
+
 func (p *Provider) Name() string {
 	return p.name
 }
 
 func (p *Provider) Value(_ context.Context, path ...string) (config.Value, error) {
-	name := p.prefix + p.key(path...)
-	if val, ok := os.LookupEnv(name); ok {
+	if val, ok := os.LookupEnv(p.Key(path...)); ok {
 		return value.JString(val), nil
 	}
 
 	return nil, fmt.Errorf("%v:%w", p.Name(), config.ErrNotFound)
 }
+
+func (p *Provider) DumpReference(_ context.Context, w io.Writer, opt config.Options) error {
+	return p.writeOptions(w, opt)
+}
+
+func (p *Provider) writeOptions(w io.Writer, opt config.Options, key ...string) error {
+	for idx, option := range opt.Options() {
+		if err := p.writeOption(w, option, key...); err != nil {
+			return fmt.Errorf("option[%d]:%w", idx, err)
+		}
+	}
+
+	return nil
+}
+
+func (p *Provider) writeOption(w io.Writer, opt config.Option, keys ...string) error {
+	if desc := param.Description(opt); desc != "" {
+		if _, derr := fmt.Fprintf(w, "# %v.\n", desc); derr != nil {
+			return fmt.Errorf("write description:%w", derr)
+		}
+	}
+
+	var err error
+
+	switch one := opt.(type) {
+	case config.Group:
+		err = p.writeOptions(w, one, append(keys, one.Name())...)
+	case config.Options:
+		err = p.writeOptions(w, one, keys...)
+	default:
+		def, dok := param.Default(opt)
+
+		prefix := ""
+		if !dok || key.IsWild(keys...) {
+			prefix = "#"
+		}
+
+		if !dok {
+			def = ""
+		}
+
+		_, err = fmt.Fprintf(w, "%s%s=%v\n", prefix, p.Key(append(keys, one.Name())...), def)
+	}
+
+	if err != nil {
+		return fmt.Errorf("%w", err)
+	}
+
+	return nil
+}

provider/env/provider_test.go

@@ -1,10 +1,17 @@
 package env_test
 
 import (
+	"bytes"
+	"context"
 	"testing"
 
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition/group"
+	"gitoa.ru/go-4devs/config/definition/option"
+	"gitoa.ru/go-4devs/config/definition/proto"
 	"gitoa.ru/go-4devs/config/provider/env"
 	"gitoa.ru/go-4devs/config/test"
+	"gitoa.ru/go-4devs/config/test/require"
 )
 
 func TestProvider(t *testing.T) {
@@ -19,3 +26,35 @@ func TestProvider(t *testing.T) {
 	}
 	test.Run(t, provider, read)
 }
+
+func TestProvider_DumpReference(t *testing.T) {
+	t.Parallel()
+
+	const expect = `# configure log.
+# level.
+FDEVS_CONFIG_LOG_LEVEL=info
+# configure log service.
+# level.
+#FDEVS_CONFIG_LOG_{SERVICE}_LEVEL=
+`
+
+	ctx := context.Background()
+	prov := env.New("fdevs", "config")
+	buf := bytes.NewBuffer(nil)
+
+	require.NoError(t, prov.DumpReference(ctx, buf, testOptions(t)))
+	require.Equal(t, buf.String(), expect)
+}
+
+func testOptions(t *testing.T) config.Options {
+	t.Helper()
+
+	return group.New("test", "test",
+		group.New("log", "configure log",
+			option.String("level", "level", option.Default("info")),
+			proto.New("service", "configure log service",
+				option.String("level", "level"),
+			),
+		),
+	)
+}

provider/factory/provider.go

@@ -0,0 +1,31 @@
+package factory
+
+import (
+	"context"
+
+	"gitoa.ru/go-4devs/config"
+)
+
+var _ config.Factory = New("", nil)
+
+type Create func(ctx context.Context, prov config.Provider) (config.Provider, error)
+
+func New(name string, fn Create) Factory {
+	return Factory{
+		create: fn,
+		name:   name,
+	}
+}
+
+type Factory struct {
+	create Create
+	name   string
+}
+
+func (f Factory) Name() string {
+	return f.name
+}
+
+func (f Factory) Create(ctx context.Context, prov config.Provider) (config.Provider, error) {
+	return f.create(ctx, prov)
+}

provider/handler/env.go

@@ -0,0 +1,74 @@
+package handler
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/processor/env"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+const (
+	envPreffix = "%env("
+	envSuffix  = ")%"
+)
+
+type EnvOption func(*EnvHandler)
+
+func WithEnvName(in string) EnvOption {
+	return func(eh *EnvHandler) {
+		eh.name = in
+	}
+}
+
+func WithEnvProcessor(proc config.Processor) EnvOption {
+	return func(eh *EnvHandler) {
+		eh.Processor = proc
+	}
+}
+
+func Env(parent config.Provider, opts ...EnvOption) EnvHandler {
+	handler := EnvHandler{
+		Provider:  parent,
+		Processor: config.ProcessFunc(env.Env),
+		name:      "env:" + parent.Name(),
+	}
+
+	for _, opt := range opts {
+		opt(&handler)
+	}
+
+	return handler
+}
+
+type EnvHandler struct {
+	config.Provider
+	config.Processor
+
+	name string
+}
+
+func (e EnvHandler) Name() string {
+	return e.name
+}
+
+func (e EnvHandler) Value(ctx context.Context, key ...string) (config.Value, error) {
+	val, err := e.Provider.Value(ctx, key...)
+	if err != nil {
+		return nil, fmt.Errorf("get %v:%w", e.Name(), err)
+	}
+
+	data, serr := val.ParseString()
+	if serr != nil || !strings.HasPrefix(data, envPreffix) || !strings.HasSuffix(data, envSuffix) {
+		return val, nil //nolint:nilerr
+	}
+
+	pval, perr := e.Process(ctx, value.String(data[len(envPreffix):len(data)-len(envSuffix)]))
+	if perr != nil {
+		return nil, fmt.Errorf("process[%v]:%w", e.Name(), perr)
+	}
+
+	return pval, nil
+}

provider/handler/env_test.go

@@ -0,0 +1,34 @@
+package handler_test
+
+import (
+	"context"
+	"testing"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/provider/handler"
+	"gitoa.ru/go-4devs/config/test/require"
+	"gitoa.ru/go-4devs/config/value"
+)
+
+type provider struct {
+	value config.Value
+}
+
+func (p provider) Value(context.Context, ...string) (config.Value, error) {
+	return p.value, nil
+}
+
+func (p provider) Name() string {
+	return "test"
+}
+
+func TestEnvValue(t *testing.T) {
+	const except = "env value"
+	t.Setenv("APP_ENV", except)
+
+	ctx := context.Background()
+	process := handler.Env(provider{value: value.String("%env(APP_ENV)%")})
+	data, err := process.Value(ctx, "any")
+	require.NoError(t, err)
+	require.Equal(t, except, data.String())
+}

provider/handler/processor.go

@@ -0,0 +1,107 @@
+package handler
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/key"
+	"gitoa.ru/go-4devs/config/param"
+)
+
+type pkey uint8
+
+const (
+	processorKey pkey = iota + 1
+)
+
+func FormatFn(fn config.ProcessFunc, opts ...param.Option) param.Option {
+	return Process(config.ProcessFunc(func(ctx context.Context, in config.Value, _ ...param.Option) (config.Value, error) {
+		return fn(ctx, in, opts...)
+	}))
+}
+
+func Process(fn config.Processor) param.Option {
+	return func(p param.Params) param.Params {
+		return param.With(p, processorKey, fn)
+	}
+}
+
+func getProcess(in param.Params) (config.Processor, bool) {
+	p, ok := in.Param(processorKey)
+	if !ok {
+		return nil, false
+	}
+
+	data, tok := p.(config.Processor)
+
+	return data, tok
+}
+
+func Processor(parent config.Provider) *ProcessHandler {
+	handler := &ProcessHandler{
+		Provider: parent,
+		name:     "process:" + parent.Name(),
+		idx:      key.Map{},
+		process:  nil,
+	}
+
+	return handler
+}
+
+type ProcessHandler struct {
+	config.Provider
+
+	idx     key.Map
+	process []config.Processor
+	name    string
+}
+
+func (p *ProcessHandler) Name() string {
+	return p.name
+}
+
+func (p *ProcessHandler) Bind(ctx context.Context, vars config.Variables) error {
+	for _, one := range vars.Variables() {
+		process, ok := getProcess(one)
+		if !ok {
+			continue
+		}
+
+		p.idx.Add(len(p.process), one.Key())
+		p.process = append(p.process, process)
+	}
+
+	log.Print(p.idx.Index([]string{"group", "int"}))
+
+	if bind, bok := p.Provider.(config.BindProvider); bok {
+		berr := bind.Bind(ctx, vars)
+		if berr != nil {
+			return fmt.Errorf("%w", berr)
+		}
+	}
+
+	return nil
+}
+
+func (p *ProcessHandler) Value(ctx context.Context, key ...string) (config.Value, error) {
+	pval, perr := p.Provider.Value(ctx, key...)
+	if perr != nil {
+		return nil, fmt.Errorf("%w", perr)
+	}
+
+	idx, iok := p.idx.Index(key)
+	if !iok {
+		return pval, nil
+	}
+
+	prov := p.process[idx]
+
+	val, err := prov.Process(ctx, pval)
+	if err != nil {
+		return nil, fmt.Errorf("process[%v]:%w", p.Name(), err)
+	}
+
+	return val, nil
+}

provider/handler/processor_test.go

@@ -0,0 +1,111 @@
+package handler_test
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"gitoa.ru/go-4devs/config"
+	"gitoa.ru/go-4devs/config/definition/group"
+	"gitoa.ru/go-4devs/config/definition/option"
+	"gitoa.ru/go-4devs/config/definition/proto"
+	"gitoa.ru/go-4devs/config/processor/csv"
+	"gitoa.ru/go-4devs/config/provider/handler"
+	"gitoa.ru/go-4devs/config/provider/memory"
+	"gitoa.ru/go-4devs/config/test/require"
+)
+
+var (
+	testKey    = []string{"test"}
+	testBool   = []string{"group", "service", "bool"}
+	testInt    = []string{"group", "int"}
+	testTime   = []string{"group", "time"}
+	testUint64 = []string{"uint64"}
+)
+
+func TestProcessor(t *testing.T) {
+	t.Parallel()
+
+	ctx := context.Background()
+
+	prov := handler.Processor(&memory.Default{})
+	require.NoError(t, prov.Bind(ctx, testVariables(t)))
+
+	tval, terr := prov.Value(ctx, testKey...)
+	require.NoError(t, terr)
+
+	var tdata []string
+
+	require.NoError(t, tval.Unmarshal(&tdata))
+	require.Equal(t, []string{"test1", "test2 data", "test3"}, tdata)
+
+	bval, berr := prov.Value(ctx, testBool...)
+	require.NoError(t, berr)
+
+	var bdata []bool
+
+	require.NoError(t, bval.Unmarshal(&bdata))
+	require.Equal(t, []bool{true, false, true}, bdata)
+
+	ival, ierr := prov.Value(ctx, testInt...)
+	require.NoError(t, ierr)
+
+	var idata []int
+
+	require.NoError(t, ival.Unmarshal(&idata))
+	require.Equal(t, []int{-42, 0, 42}, idata)
+
+	tival, tierr := prov.Value(ctx, testTime...)
+	require.NoError(t, tierr)
+
+	var tidata []time.Time
+
+	require.NoError(t, tival.Unmarshal(&tidata))
+	require.Equal(t, []time.Time{time.Date(2006, time.January, 2, 15, 4, 5, 0, time.UTC)}, tidata)
+
+	uval, uerr := prov.Value(ctx, testUint64...)
+	require.NoError(t, uerr)
+
+	var udata []uint64
+
+	require.NoError(t, uval.Unmarshal(&udata))
+	require.Equal(t, []uint64{42}, udata)
+}
+
+func testVariables(t *testing.T) config.Variables {
+	t.Helper()
+
+	vars := config.NewVars(
+		option.String("test", "test",
+			option.Slice,
+			option.Default("test1,\"test2 data\",test3"),
+			handler.Process(config.ProcessFunc(csv.Csv)),
+		),
+		group.New("group", "group",
+			proto.New("proto", "proto",
+				option.Bool("bool", "bool",
+					option.Slice,
+					option.Default("true|false|true"),
+					handler.FormatFn(csv.Csv, csv.WithBool, csv.WithDelimiter('|')),
+				),
+			),
+			option.Int("int", "int",
+				option.Slice,
+				option.Default("-42,0,42"),
+				handler.FormatFn(csv.Csv, csv.WithInt),
+			),
+			option.Time("time", "time",
+				option.Slice,
+				option.Default("2006-01-02T15:04:05Z"),
+				handler.FormatFn(csv.Csv, csv.WithTime),
+			),
+		),
+		option.Uint64("uint64", "uint64",
+			option.Slice,
+			option.Default("42"),
+			handler.FormatFn(csv.Csv, csv.WithUint64),
+		),
+	)
+
+	return vars
+}

provider/memory/def.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 
 	"gitoa.ru/go-4devs/config"
-	"gitoa.ru/go-4devs/config/definition/option"
+	"gitoa.ru/go-4devs/config/param"
 )
 
 const NameDefault = "default"
@@ -27,7 +27,7 @@ func (a *Default) Value(ctx context.Context, key ...string) (config.Value, error
 
 func (a *Default) Bind(_ context.Context, def config.Variables) error {
 	for _, opt := range def.Variables() {
-		if data, ok := option.DataDefaut(opt); ok {
+		if data, ok := param.Default(opt); ok {
 			a.data.SetOption(data, opt.Key()...)
 		}
 	}

test/require/true.go

@@ -12,3 +12,13 @@ func Truef(t *testing.T, value bool, msg string, args ...any) {
 		t.FailNow()
 	}
 }
+
+func True(t *testing.T, value bool, args ...any) {
+	t.Helper()
+
+	if !value {
+		t.Errorf("require:true got:%v", value)
+		t.Error(args...)
+		t.FailNow()
+	}
+}

value/helpers.go

@@ -89,8 +89,22 @@ func JUnmarshal(b []byte, v any) error {
 	return nil
 }
 
-func JParce[T any](b []byte) (T, error) {
+func JParse[T any](b []byte) (T, error) {
 	var data T
 
 	return data, JUnmarshal(b, &data)
 }
+
+func ParseSlice[T any](in []string, fn func(string) (T, error)) (config.Value, error) {
+	out := make([]T, 0, len(in))
+	for idx, one := range in {
+		data, err := fn(one)
+		if err != nil {
+			return nil, fmt.Errorf("parse[%T][%d]:%w", out, idx, err)
+		}
+
+		out = append(out, data)
+	}
+
+	return New(out), nil
+}

value/jbytes.go

@@ -23,31 +23,31 @@ func (s JBytes) ParseString() (string, error) {
 }
 
 func (s JBytes) ParseInt() (int, error) {
-	return JParce[int](s.Bytes())
+	return JParse[int](s.Bytes())
 }
 
 func (s JBytes) ParseInt64() (int64, error) {
-	return JParce[int64](s.Bytes())
+	return JParse[int64](s.Bytes())
 }
 
 func (s JBytes) ParseUint() (uint, error) {
-	return JParce[uint](s.Bytes())
+	return JParse[uint](s.Bytes())
 }
 
 func (s JBytes) ParseUint64() (uint64, error) {
-	return JParce[uint64](s.Bytes())
+	return JParse[uint64](s.Bytes())
 }
 
 func (s JBytes) ParseFloat64() (float64, error) {
-	return JParce[float64](s.Bytes())
+	return JParse[float64](s.Bytes())
 }
 
 func (s JBytes) ParseBool() (bool, error) {
-	return JParce[bool](s.Bytes())
+	return JParse[bool](s.Bytes())
 }
 
 func (s JBytes) ParseDuration() (time.Duration, error) {
-	jdata, jerr := JParce[time.Duration](s.Bytes())
+	jdata, jerr := JParse[time.Duration](s.Bytes())
 	if jerr == nil {
 		return jdata, nil
 	}
@@ -61,7 +61,7 @@ func (s JBytes) ParseDuration() (time.Duration, error) {
 }
 
 func (s JBytes) ParseTime() (time.Time, error) {
-	return JParce[time.Time](s.Bytes())
+	return JParse[time.Time](s.Bytes())
 }
 
 func (s JBytes) Bytes() []byte {

value/string.go

@@ -2,7 +2,6 @@ package value
 
 import (
 	"fmt"
-	"strconv"
 	"time"
 
 	"gitoa.ru/go-4devs/config"
@@ -32,12 +31,7 @@ func (s String) Any() any {
 }
 
 func (s String) ParseInt() (int, error) {
-	v, err := strconv.Atoi(string(s))
-	if err != nil {
-		return 0, fmt.Errorf("string int:%w", err)
-	}
-
-	return v, nil
+	return Atoi(s.String())
 }
 
 func (s String) Int64() int64 {
@@ -47,63 +41,31 @@ func (s String) Int64() int64 {
 }
 
 func (s String) ParseInt64() (int64, error) {
-	v, err := strconv.ParseInt(string(s), 10, 64)
-	if err != nil {
-		return 0, fmt.Errorf("string int64:%w", err)
-	}
-
-	return v, nil
+	return ParseInt64(s.String())
 }
 
 func (s String) ParseUint() (uint, error) {
-	uout, err := s.ParseUint64()
-
-	return uint(uout), err
+	return ParseUint(s.String())
 }
 
 func (s String) ParseUint64() (uint64, error) {
-	uout, err := strconv.ParseUint(string(s), 10, 64)
-	if err != nil {
-		return 0, fmt.Errorf("string uint:%w", err)
-	}
-
-	return uout, nil
+	return ParseUint64(s.String())
 }
 
 func (s String) ParseFloat64() (float64, error) {
-	fout, err := strconv.ParseFloat(string(s), 64)
-	if err != nil {
-		return 0, fmt.Errorf("string float64:%w", err)
-	}
-
-	return fout, nil
+	return ParseFloat(s.String())
 }
 
 func (s String) ParseBool() (bool, error) {
-	v, err := strconv.ParseBool(string(s))
-	if err != nil {
-		return false, fmt.Errorf("string bool:%w", err)
-	}
-
-	return v, nil
+	return ParseBool(s.String())
 }
 
 func (s String) ParseDuration() (time.Duration, error) {
-	v, err := time.ParseDuration(string(s))
-	if err != nil {
-		return 0, fmt.Errorf("string duration:%w", err)
-	}
-
-	return v, nil
+	return ParseDuration(s.String())
 }
 
 func (s String) ParseTime() (time.Time, error) {
-	v, err := time.Parse(time.RFC3339, string(s))
-	if err != nil {
-		return time.Time{}, fmt.Errorf("string time:%w", err)
-	}
-
-	return v, nil
+	return ParseTime(s.String())
 }
 
 func (s String) IsEquals(val config.Value) bool {

value/value.go

@@ -171,7 +171,7 @@ func typeAssert(source, target any) error {
 	}
 
 	valTarget := reflect.ValueOf(target)
-	if !valTarget.IsValid() || valTarget.Kind() != reflect.Ptr {
+	if !valTarget.IsValid() || valTarget.Kind() != reflect.Pointer {
 		return fmt.Errorf("ptr target:%w", config.ErrInvalidValue)
 	}
 
@@ -245,7 +245,7 @@ func directTypeAssert(source, target any) bool {
 }
 
 func deReference(v reflect.Value) reflect.Value {
-	if (v.Kind() == reflect.Ptr || v.Kind() == reflect.Interface) && !v.IsNil() {
+	if (v.Kind() == reflect.Pointer || v.Kind() == reflect.Interface) && !v.IsNil() {
 		return v.Elem()
 	}
 

variable.go

@@ -8,9 +8,14 @@ import (
 )
 
 func NewVar(opt Option) Variable {
+	names := make([]string, 0, 1)
+	if name := opt.Name(); name != "" {
+		names = append(names, name)
+	}
+
 	return Variable{
 		param: opt,
-		names: []string{opt.Name()},
+		names: names,
 	}
 }
 
@@ -58,6 +63,12 @@ func newVars(opts ...Option) []Variable {
 		one := NewVar(opt)
 		switch data := opt.(type) {
 		case Group:
+			if data.Name() == "" {
+				vars = append(vars, newVars(data.Options()...)...)
+
+				continue
+			}
+
 			vars = append(vars, groupVars(one, data.Options()...)...)
 		default:
 			vars = append(vars, one)