.github/dependabot.yml

@@ -1,19 +0,0 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
-version: 2
-updates:
-
-  # Maintain dependencies for GitHub Actions
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "daily"
-
-  # Maintain dependencies for Golang
-  - package-ecosystem: "gomod"
-    directory: "/"
-    schedule:
-      interval: "daily"

.github/stale.sh

@@ -0,0 +1,13 @@
+#!/bin/bash -ex
+
+export PATH=$PATH:$(pwd)/bin
+export GO111MODULE=on
+export GOBIN=$(pwd)/bin
+
+#go get github.com/rvflash/goup@v0.4.1
+
+#goup -v ./...
+#go get github.com/psampaz/go-mod-outdated@v0.6.0
+go list -u -m -mod=mod -json all | go-mod-outdated -update -direct -ci || true
+
+#go list -u -m -json all | go-mod-outdated -update

.github/workflows/autoapprove.yml

@@ -1,20 +0,0 @@
-name: "autoapprove"
-
-on:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  autoapprove:
-    runs-on: ubuntu-latest
-    steps:
-      - name: approve
-        uses: hmarr/auto-approve-action@v3
-        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
-        id: approve
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -1,21 +0,0 @@
-name: "automerge"
-
-on:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  automerge:
-    runs-on: ubuntu-latest
-    if: github.actor == 'vtolstov'
-    steps:
-      - name: merge
-        id: merge
-        run: gh pr merge --auto --merge "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/build.yml

@@ -3,20 +3,19 @@ on:
  push:
     branches:
     - master
-    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v1
       with:
-        go-version: 1.17
+        go-version: 1.15
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v2
     - name: cache
-      uses: actions/cache@v3
+      uses: actions/cache@v2
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -32,9 +31,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2
       - name: lint
-        uses: golangci/golangci-lint-action@v3.4.0
+        uses: golangci/golangci-lint-action@v1
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github/workflows/codeql-analysis.yml

@@ -1,78 +0,0 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "codeql"
-
-on:
-  workflow_run:
-    workflows: ["prbuild"]
-    types:
-      - completed
-  push:
-    branches: [ master, v3 ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ master, v3 ]
-  schedule:
-    - cron: '34 1 * * 0'
-
-jobs:
-  analyze:
-    name: analyze
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'go' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
-        # Learn more:
-        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
-
-    steps:
-    - name: checkout
-      uses: actions/checkout@v3
-    - name: setup
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.17
-    # Initializes the CodeQL tools for scanning.
-    - name: init
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: autobuild
-      uses: github/codeql-action/autobuild@v2
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
-
-    - name: analyze
-      uses: github/codeql-action/analyze@v2

.github/workflows/dependabot-automerge.yml

@@ -1,27 +0,0 @@
-name: "dependabot-automerge"
-
-on:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
-
-permissions:
-  pull-requests: write
-  contents: write
-
-jobs:
-  automerge:
-    runs-on: ubuntu-latest
-    if: github.actor == 'dependabot[bot]'
-    steps:
-      - name: metadata
-        id: metadata
-        uses: dependabot/fetch-metadata@v1.3.6
-        with:
-          github-token: "${{ secrets.TOKEN }}"
-      - name: merge
-        id: merge
-        if: ${{contains(steps.metadata.outputs.dependency-names, 'go.unistack.org')}}
-        run: gh pr merge --auto --merge "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/pr.yml

@@ -3,20 +3,19 @@ on:
   pull_request:
     branches:
     - master
-    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v1
       with:
-        go-version: 1.17
+        go-version: 1.15
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v2
     - name: cache
-      uses: actions/cache@v3
+      uses: actions/cache@v2
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -32,9 +31,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2
       - name: lint
-        uses: golangci/golangci-lint-action@v3.4.0
+        uses: golangci/golangci-lint-action@v1
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

file.go

@@ -2,239 +2,102 @@ package file
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
-	"regexp"
 
-	"dario.cat/mergo"
+	"github.com/imdario/mergo"
-	"go.unistack.org/micro/v4/codec"
+	"github.com/unistack-org/micro/v3/codec"
-	"go.unistack.org/micro/v4/config"
+	"github.com/unistack-org/micro/v3/config"
-	"go.unistack.org/micro/v4/options"
+	rutil "github.com/unistack-org/micro/v3/util/reflect"
-	rutil "go.unistack.org/micro/v4/util/reflect"
-	"golang.org/x/text/transform"
 )
 
-var DefaultStructTag = "file"
+var (
+	DefaultStructTag = "file"
+	ErrPathNotExist  = errors.New("path is not exist")
+)
 
 type fileConfig struct {
 	opts config.Options
 	path string
-	reader      io.Reader
-	transformer transform.Transformer
 }
 
 func (c *fileConfig) Options() config.Options {
 	return c.opts
 }
 
-func (c *fileConfig) Init(opts ...options.Option) error {
+func (c *fileConfig) Init(opts ...config.Option) error {
-	var err error
-
-	if err = config.DefaultBeforeInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
 	for _, o := range opts {
-		if err = o(&c.opts); err != nil {
+		o(&c.opts)
-			return err
-		}
 	}
 
+	path := ""
+
 	if c.opts.Context != nil {
 		if v, ok := c.opts.Context.Value(pathKey{}).(string); ok {
-			c.path = v
-		}
-		if v, ok := c.opts.Context.Value(transformerKey{}).(transform.Transformer); ok {
-			c.transformer = v
-		}
-		if v, ok := c.opts.Context.Value(readerKey{}).(io.Reader); ok {
-			c.reader = v
-		}
-	}
-
-	if c.opts.Codec == nil {
-		return fmt.Errorf("Codec must be specified")
-	}
-
-	if c.path == "" && c.reader == nil {
-		err := fmt.Errorf("Path or Reader must be specified")
-		if !c.opts.AllowFail {
-			return err
-		}
-	}
-
-	if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	return nil
-}
-
-func (c *fileConfig) Load(ctx context.Context, opts ...options.Option) error {
-	if c.opts.SkipLoad != nil && c.opts.SkipLoad(ctx, c) {
-		return nil
-	}
-
-	if err := config.DefaultBeforeLoad(ctx, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	path := c.path
-	transformer := c.transformer
-	reader := c.reader
-
-	options := config.NewLoadOptions(opts...)
-	if options.Context != nil {
-		if v, ok := options.Context.Value(pathKey{}).(string); ok && v != "" {
 			path = v
 		}
-		if v, ok := c.opts.Context.Value(transformerKey{}).(transform.Transformer); ok {
-			transformer = v
-		}
-		if v, ok := c.opts.Context.Value(readerKey{}).(io.Reader); ok {
-			reader = v
-		}
 	}
 
-	var fp io.Reader
+	if path == "" {
-	var err error
+		return ErrPathNotExist
-
-	if c.path != "" {
-		fp, err = os.OpenFile(path, os.O_RDONLY, os.FileMode(0o400))
-	} else if c.reader != nil {
-		fp = reader
-	} else {
-		err = fmt.Errorf("Path or Reader must be specified")
 	}
 
-	if err != nil {
+	c.path = path
-		if !c.opts.AllowFail {
-			if c.path != "" {
-				return fmt.Errorf("file load path %s error: %w", path, err)
-			} else {
-				return fmt.Errorf("file load error: %w", err)
-			}
-		}
-		if err = config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
-			return err
-		}
 
 	return nil
 }
 
-	if fpc, ok := fp.(io.Closer); ok {
+func (c *fileConfig) Load(ctx context.Context) error {
-		defer fpc.Close()
+	for _, fn := range c.opts.BeforeLoad {
-	}
+		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
-
-	var r io.Reader
-	if transformer != nil {
-		r = transform.NewReader(fp, c.transformer)
-	} else {
-		r = fp
-	}
-
-	buf, err := io.ReadAll(io.LimitReader(r, int64(codec.DefaultMaxMsgSize)))
-	if err != nil {
-		if !c.opts.AllowFail {
 			return err
 		}
-		if err = config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
-			return err
 	}
 
-		return nil
+	fp, err := os.OpenFile(c.path, os.O_RDONLY, os.FileMode(0400))
-	}
+	if err != nil && !c.opts.AllowFail {
-
+		return fmt.Errorf("failed to open: %s, error: %w", c.path, ErrPathNotExist)
-	dst := c.opts.Struct
+	} else if err == nil {
-	if options.Struct != nil {
+		defer fp.Close()
-		dst = options.Struct
+		var buf []byte
-	}
+		buf, err = ioutil.ReadAll(io.LimitReader(fp, int64(codec.DefaultMaxMsgSize)))
-
+		if err == nil {
-	src, err := rutil.Zero(dst)
+			src, err := rutil.Zero(c.opts.Struct)
 			if err == nil {
 				err = c.opts.Codec.Unmarshal(buf, src)
 				if err == nil {
-			options := config.NewLoadOptions(opts...)
+					err = mergo.Merge(c.opts.Struct, src, mergo.WithOverride, mergo.WithTypeCheck, mergo.WithAppendSlice)
-			mopts := []func(*mergo.Config){mergo.WithTypeCheck}
+				}
-			if options.Override {
-				mopts = append(mopts, mergo.WithOverride)
-			}
-			if options.Append {
-				mopts = append(mopts, mergo.WithAppendSlice)
-			}
-			err = mergo.Merge(dst, src, mopts...)
 			}
 		}
-
 		if err != nil && !c.opts.AllowFail {
 			return err
 		}
+	}
 
-	if err := config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
+	for _, fn := range c.opts.AfterLoad {
+		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
 			return err
 		}
+	}
 
 	return nil
 }
 
-func (c *fileConfig) Save(ctx context.Context, opts ...options.Option) error {
+func (c *fileConfig) Save(ctx context.Context) error {
-	if c.opts.SkipSave != nil && c.opts.SkipSave(ctx, c) {
+	for _, fn := range c.opts.BeforeSave {
-		return nil
+		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
-	}
-
-	if err := config.DefaultBeforeSave(ctx, c); err != nil && !c.opts.AllowFail {
 			return err
 		}
-
-	path := c.path
-	options := config.NewSaveOptions(opts...)
-	if options.Context != nil {
-		if v, ok := options.Context.Value(pathKey{}).(string); ok && v != "" {
-			path = v
-		}
 	}
 
-	dst := c.opts.Struct
+	for _, fn := range c.opts.AfterSave {
-	if options.Struct != nil {
+		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
-		dst = options.Struct
-	}
-
-	buf, err := c.opts.Codec.Marshal(dst)
-	if err != nil {
-		if !c.opts.AllowFail {
 			return err
 		}
-		if err = config.DefaultAfterSave(ctx, c); err != nil && !c.opts.AllowFail {
-			return err
-		}
-
-		return nil
-	}
-
-	fp, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, os.FileMode(0o600))
-	if err != nil {
-		if !c.opts.AllowFail {
-			return err
-		}
-		if err = config.DefaultAfterSave(ctx, c); err != nil && !c.opts.AllowFail {
-			return err
-		}
-
-		return nil
-	}
-	defer fp.Close()
-
-	if _, err = fp.Write(buf); err == nil {
-		err = fp.Close()
-	}
-
-	if err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	if err := config.DefaultAfterSave(ctx, c); err != nil && !c.opts.AllowFail {
-		return err
 	}
 
 	return nil
@@ -248,112 +111,10 @@ func (c *fileConfig) Name() string {
 	return c.opts.Name
 }
 
-func (c *fileConfig) Watch(ctx context.Context, opts ...options.Option) (config.Watcher, error) {
+func NewConfig(opts ...config.Option) config.Config {
-	path := c.path
-	options := config.NewWatchOptions(opts...)
-	if options.Context != nil {
-		if v, ok := options.Context.Value(pathKey{}).(string); ok && v != "" {
-			path = v
-		}
-	}
-
-	w := &fileWatcher{
-		path:  path,
-		opts:  c.opts,
-		wopts: config.NewWatchOptions(opts...),
-		done:  make(chan struct{}),
-		vchan: make(chan map[string]interface{}),
-		echan: make(chan error),
-	}
-
-	go w.run()
-
-	return w, nil
-}
-
-func NewConfig(opts ...options.Option) config.Config {
 	options := config.NewOptions(opts...)
 	if len(options.StructTag) == 0 {
 		options.StructTag = DefaultStructTag
 	}
 	return &fileConfig{opts: options}
 }
-
-type EnvTransformer struct {
-	maxMatchSize    int
-	Regexp          *regexp.Regexp
-	TransformerFunc TransformerFunc
-	overflow        []byte
-}
-
-var _ transform.Transformer = (*EnvTransformer)(nil)
-
-// Transform implements golang.org/x/text/transform#Transformer
-func (t *EnvTransformer) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
-	t.maxMatchSize = 1024
-	var n int
-	// copy any overflow from the last call
-	if len(t.overflow) > 0 {
-		n, err = fullcopy(dst, t.overflow)
-		nDst += n
-		if err != nil {
-			t.overflow = t.overflow[n:]
-			return
-		}
-		t.overflow = nil
-	}
-	for _, index := range t.Regexp.FindAllSubmatchIndex(src, -1) {
-		// copy everything up to the match
-		n, err = fullcopy(dst[nDst:], src[nSrc:index[0]])
-		nSrc += n
-		nDst += n
-		if err != nil {
-			return
-		}
-		// skip the match if it ends at the end the src buffer.
-		// it could potentially match more
-		if index[1] == len(src) && !atEOF {
-			break
-		}
-		// copy the replacement
-		rep := t.TransformerFunc(src, index)
-		n, err = fullcopy(dst[nDst:], rep)
-		nDst += n
-		nSrc = index[1]
-		if err != nil {
-			t.overflow = rep[n:]
-			return
-		}
-	}
-	// if we're at the end, tack on any remaining bytes
-	if atEOF {
-		n, err = fullcopy(dst[nDst:], src[nSrc:])
-		nDst += n
-		nSrc += n
-		return
-	}
-	// skip any bytes which exceede the max match size
-	if skip := len(src[nSrc:]) - t.maxMatchSize; skip > 0 {
-		n, err = fullcopy(dst[nDst:], src[nSrc:nSrc+skip])
-		nSrc += n
-		nDst += n
-		if err != nil {
-			return
-		}
-	}
-	err = transform.ErrShortSrc
-	return
-}
-
-// Reset resets the state and allows a Transformer to be reused.
-func (t *EnvTransformer) Reset() {
-	t.overflow = nil
-}
-
-func fullcopy(dst, src []byte) (n int, err error) {
-	n = copy(dst, src)
-	if n < len(src) {
-		err = transform.ErrShortDst
-	}
-	return
-}

file_test.go

@@ -1,73 +0,0 @@
-package file
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"io"
-	"os"
-	"testing"
-
-	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/config"
-	"go.unistack.org/micro/v4/options"
-)
-
-type jsoncodec struct{}
-
-func (*jsoncodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
-	return json.Marshal(v)
-}
-
-func (*jsoncodec) Unmarshal(buf []byte, v interface{}, opts ...codec.Option) error {
-	return json.Unmarshal(buf, v)
-}
-
-func (*jsoncodec) ReadBody(r io.Reader, v interface{}) error {
-	return nil
-}
-
-func (*jsoncodec) ReadHeader(r io.Reader, m *codec.Message, t codec.MessageType) error {
-	return nil
-}
-
-func (*jsoncodec) String() string {
-	return "json"
-}
-
-func (*jsoncodec) Write(w io.Writer, m *codec.Message, v interface{}) error {
-	return nil
-}
-
-func TestLoadReplace(t *testing.T) {
-	type Config struct {
-		Key  string
-		Pass string
-	}
-	os.Setenv("PLACEHOLDER", "test")
-	cfg := &Config{}
-	ctx := context.TODO()
-	buf := bytes.NewReader([]byte(`{"key":"val","pass":"${PLACEHOLDER}"}`))
-	tr, err := NewEnvTransformer(`(?s)\$\{.*?\}`, 2, 1)
-	if err != nil {
-		t.Fatal(err)
-	}
-	c := NewConfig(options.Codec(
-		&jsoncodec{}),
-		config.Struct(cfg),
-		Reader(buf),
-		Transformer(tr),
-	)
-
-	if err := c.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := c.Load(ctx); err != nil {
-		t.Fatal(err)
-	}
-
-	if cfg.Pass != "test" {
-		t.Fatalf("not works %#+v\n", cfg)
-	}
-}

go.mod

@@ -1,10 +1,8 @@
-module go.unistack.org/micro-config-file/v4
+module github.com/unistack-org/micro-config-file/v3
 
-go 1.20
+go 1.15
 
 require (
-	dario.cat/mergo v1.0.0
+	github.com/imdario/mergo v0.3.11
-	go.unistack.org/micro/v4 v4.0.17
+	github.com/unistack-org/micro/v3 v3.2.4
 )
-
-require github.com/google/uuid v1.6.0 // indirect

go.sum

@@ -1,9 +1,122 @@
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+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

options.go

@@ -1,52 +1,11 @@
 package file
 
 import (
-	"io"
+	"github.com/unistack-org/micro/v3/config"
-	"os"
-	"regexp"
-
-	"go.unistack.org/micro/v4/options"
-	"golang.org/x/text/transform"
 )
 
 type pathKey struct{}
 
-func Path(path string) options.Option {
+func Path(path string) config.Option {
-	return options.ContextOption(pathKey{}, path)
+	return config.SetOption(pathKey{}, path)
-}
-
-type readerKey struct{}
-
-func Reader(r io.Reader) options.Option {
-	return options.ContextOption(readerKey{}, r)
-}
-
-type transformerKey struct{}
-
-type TransformerFunc func(src []byte, index []int) []byte
-
-func Transformer(t transform.Transformer) options.Option {
-	return options.ContextOption(transformerKey{}, t)
-}
-
-func NewEnvTransformer(rs string, trimLeft, trimRight int) (*EnvTransformer, error) {
-	re, err := regexp.Compile(rs)
-	if err != nil {
-		return nil, err
-	}
-	return &EnvTransformer{
-		Regexp: re,
-		TransformerFunc: func(src []byte, index []int) []byte {
-			var envKey string
-			if len(src) > index[1]-trimRight {
-				envKey = string(src[index[0]+trimLeft : index[1]-trimRight])
-			}
-
-			if envVal, ok := os.LookupEnv(envKey); ok {
-				return []byte(envVal)
-			}
-
-			return src[index[0]:index[1]]
-		},
-	}, nil
 }

watcher.go

@@ -1,103 +0,0 @@
-package file
-
-import (
-	"fmt"
-	"io"
-	"io/ioutil"
-	"os"
-	"reflect"
-
-	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/config"
-	"go.unistack.org/micro/v4/util/jitter"
-	rutil "go.unistack.org/micro/v4/util/reflect"
-)
-
-type fileWatcher struct {
-	path  string
-	opts  config.Options
-	wopts config.WatchOptions
-	done  chan struct{}
-	vchan chan map[string]interface{}
-	echan chan error
-}
-
-func (w *fileWatcher) run() {
-	ticker := jitter.NewTicker(w.wopts.MinInterval, w.wopts.MaxInterval)
-	defer ticker.Stop()
-
-	src := w.opts.Struct
-	if w.wopts.Struct != nil {
-		src = w.wopts.Struct
-	}
-
-	for {
-		select {
-		case <-w.done:
-			return
-		case <-ticker.C:
-			dst, err := rutil.Zero(src)
-			if err == nil {
-				var fp *os.File
-				if fp, err = os.OpenFile(w.path, os.O_RDONLY, os.FileMode(0400)); err != nil {
-					w.echan <- fmt.Errorf("failed to open: %s, error: %w", w.path, err)
-					return
-				}
-				var buf []byte
-				buf, err = ioutil.ReadAll(io.LimitReader(fp, int64(codec.DefaultMaxMsgSize)))
-				if err == nil {
-					err = w.opts.Codec.Unmarshal(buf, dst)
-				}
-				if err != nil {
-					_ = fp.Close()
-					w.echan <- err
-					return
-				}
-				err = fp.Close()
-			}
-			if err != nil {
-				w.echan <- err
-				return
-			}
-			srcmp, err := rutil.StructFieldsMap(src)
-			if err != nil {
-				w.echan <- err
-				return
-			}
-			dstmp, err := rutil.StructFieldsMap(dst)
-			if err != nil {
-				w.echan <- err
-				return
-			}
-			for sk, sv := range srcmp {
-				if reflect.DeepEqual(dstmp[sk], sv) {
-					delete(dstmp, sk)
-				}
-			}
-			if len(dstmp) > 0 {
-				w.vchan <- dstmp
-				src = dst
-			}
-		}
-	}
-}
-
-func (w *fileWatcher) Next() (map[string]interface{}, error) {
-	select {
-	case <-w.done:
-		break
-	case err := <-w.echan:
-		return nil, err
-	case v, ok := <-w.vchan:
-		if !ok {
-			break
-		}
-		return v, nil
-	}
-	return nil, config.ErrWatcherStopped
-}
-
-func (w *fileWatcher) Stop() error {
-	close(w.done)
-	return nil
-}