.gitea/workflows/job_lint.yml

@@ -1,29 +0,0 @@
-name: lint
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable' 
-    - name: setup deps
-      run: go get -v ./...
-    - name: run lint
-      uses: https://github.com/golangci/golangci-lint-action@v6
-      with:
-        version: 'latest'

.gitea/workflows/job_test.yml

@@ -1,34 +0,0 @@
-name: test
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-  push:
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-    - name: setup deps
-      run: go get -v ./...
-    - name: run test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...

.gitea/workflows/job_tests.yml

@@ -1,53 +0,0 @@
-name: test
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-  push:
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: checkout tests
-      uses: actions/checkout@v4
-      with:
-        ref: master
-        filter: 'blob:none'
-        repository: unistack-org/micro-tests
-        path: micro-tests
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-    - name: setup go work
-      env:
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: |
-        go work init
-        go work use .
-        go work use micro-tests        
-    - name: setup deps
-      env:
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: go get -v ./...
-    - name: run tests
-      env:
-        INTEGRATION_TESTS: yes
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: |
-        cd micro-tests
-        go test -mod readonly -v ./... || true        

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# 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/workflows/autoapprove.yml

@@ -0,0 +1,20 @@
+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@v2
+        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -0,0 +1,21 @@
+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

@@ -0,0 +1,47 @@
+name: build
+on:
+ push:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        uses: golangci/golangci-lint-action@v3.1.0
+        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.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,78 @@
+# 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@v2
+      with:
+        go-version: 1.17
+    # Initializes the CodeQL tools for scanning.
+    - name: init
+      uses: github/codeql-action/init@v1
+      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@v1
+
+    # 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@v1

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,27 @@
+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@v1.3.0
+        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

@@ -0,0 +1,47 @@
+name: prbuild
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        uses: golangci/golangci-lint-action@v3.1.0
+        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.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.golangci.yml

@@ -1,5 +0,0 @@
-run:
-  concurrency: 8
-  deadline: 5m
-  issues-exit-code: 1
-  tests: true

flag.go

@@ -1,13 +1,11 @@
-package flag
+package flag // import "go.unistack.org/micro-config-flag/v3"
 
 import (
 	"context"
 	"errors"
 	"flag"
 	"fmt"
-	"os"
 	"reflect"
-	"strings"
 	"time"
 
 	"go.unistack.org/micro/v3/config"
@@ -29,10 +27,7 @@ var (
 */
 
 type flagConfig struct {
-	fset *flag.FlagSet
 	opts config.Options
-	name string
-	env  string
 }
 
 func (c *flagConfig) Options() config.Options {
@@ -44,35 +39,17 @@ func (c *flagConfig) Init(opts ...config.Option) error {
 		o(&c.opts)
 	}
 
-	if err := config.DefaultBeforeInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	c.configure()
-
 	fields, err := rutil.StructFields(c.opts.Struct)
 	if err != nil {
-		if !c.opts.AllowFail {
 		return err
 	}
 
-		if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-			return err
-		}
-
-		return nil
-	}
-
 	for _, sf := range fields {
 		tf, ok := sf.Field.Tag.Lookup(c.opts.StructTag)
 		if !ok {
 			continue
 		}
-
 		fn, fd, fv := getFlagOpts(tf)
-		if tf, ok = sf.Field.Tag.Lookup(c.env); ok {
-			fd += fmt.Sprintf(" (env %s)", tf)
-		}
 
 		rcheck := true
 
@@ -83,9 +60,6 @@ func (c *flagConfig) Init(opts ...config.Option) error {
 		if vi == nil {
 			continue
 		}
-		if f := flag.Lookup(fn); f != nil {
-			return nil
-		}
 
 		switch vi.(type) {
 		case time.Duration:
@@ -97,13 +71,10 @@ func (c *flagConfig) Init(opts ...config.Option) error {
 		}
 
 		if err != nil {
+			c.opts.Logger.Errorf(c.opts.Context, "flag init error: %v", err)
 			if !c.opts.AllowFail {
 				return err
 			}
-			if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-				return err
-			}
-
 			return nil
 		}
 
@@ -136,60 +107,26 @@ func (c *flagConfig) Init(opts ...config.Option) error {
 			err = c.flagMap(sf.Value, fn, fv, fd)
 		}
 		if err != nil {
+			c.opts.Logger.Errorf(c.opts.Context, "flag init error: %v", err)
 			if !c.opts.AllowFail {
 				return err
 			}
-
-			if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-				return err
-			}
-
 			return nil
 		}
 	}
 
-	if err := config.DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
 	return nil
 }
 
 func (c *flagConfig) Load(ctx context.Context, opts ...config.LoadOption) error {
-	if c.opts.SkipLoad != nil && c.opts.SkipLoad(ctx, c) {
-		return nil
-	}
-
 	options := config.NewLoadOptions(opts...)
 	_ = options
-
-	if err := config.DefaultBeforeLoad(ctx, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	if err := config.DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
 	// TODO: allow merge, append and so
 	flag.Parse()
-
 	return nil
 }
 
 func (c *flagConfig) Save(ctx context.Context, opts ...config.SaveOption) error {
-	if c.opts.SkipSave != nil && c.opts.SkipSave(ctx, c) {
-		return nil
-	}
-
-	if err := config.DefaultBeforeSave(ctx, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	if err := config.DefaultAfterSave(ctx, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
 	return nil
 }
 
@@ -205,125 +142,10 @@ func (c *flagConfig) Watch(ctx context.Context, opts ...config.WatchOption) (con
 	return nil, fmt.Errorf("not implemented")
 }
 
-func (c *flagConfig) usage() {
-	mapDelim := DefaultMapDelim
-	sliceDelim := DefaultSliceDelim
-
-	if c.opts.Context != nil {
-		if d, ok := c.opts.Context.Value(mapDelimKey{}).(string); ok {
-			mapDelim = d
-		}
-		if d, ok := c.opts.Context.Value(sliceDelimKey{}).(string); ok {
-			sliceDelim = d
-		}
-	}
-
-	if c.name == "" {
-		fmt.Fprintf(c.fset.Output(), "Usage:\n")
-	} else {
-		fmt.Fprintf(c.fset.Output(), "Usage of %s:\n", c.name)
-	}
-
-	c.fset.VisitAll(func(f *flag.Flag) {
-		var b strings.Builder
-		fmt.Fprintf(&b, "  -%s", f.Name) // Two spaces before -; see next two comments.
-		_, usage := flag.UnquoteUsage(f)
-		name := "value"
-		v := reflect.TypeOf(f.Value).String()
-		b.WriteString(" ")
-		switch v {
-		case "*flag.boolFlag":
-			name = "bool"
-		case "*flag.durationValue":
-			name = "duration"
-		case "*flag.float64Value":
-			name = "float"
-		case "*flag.intValue", "*flag.int64Value":
-			name = "int"
-		case "*flag.stringValue":
-			name = "string"
-		case "*flag.uintValue", "*flag.uint64Value":
-			name = "uint"
-		case "*flag.mapValue":
-			//	nv := f.Value.(*mapValue)
-			name = fmt.Sprintf("string key=val with %q as separator", mapDelim)
-		case "*flag.sliceValue":
-			//	nv := f.Value.(*sliceValue)
-			name = fmt.Sprintf("string with %q as separator", sliceDelim)
-		}
-		b.WriteString(name)
-
-		// Boolean flags of one ASCII letter are so common we
-		// treat them specially, putting their usage on the same line.
-		if b.Len() <= 4 { // space, space, '-', 'x'.
-			b.WriteString("\t")
-		} else {
-			// Four spaces before the tab triggers good alignment
-			// for both 4- and 8-space tab stops.
-			b.WriteString("\n    \t")
-		}
-		b.WriteString(strings.ReplaceAll(usage, "\n", "\n    \t"))
-
-		if f.Value.String() == f.DefValue {
-			fmt.Fprintf(&b, " (default %q)", f.DefValue)
-		} else {
-			fmt.Fprintf(&b, " (default %q current %q)", f.DefValue, f.Value)
-		}
-
-		fmt.Fprint(c.fset.Output(), b.String(), "\n")
-	})
-}
-
-func (c *flagConfig) configure() {
-	flagSet := flag.CommandLine
-	flagSetName := os.Args[0]
-	flagSetErrorHandling := flag.ExitOnError
-	flagEnv := "env"
-	var flagUsage func()
-	var isSet bool
-
-	if c.opts.Context != nil {
-		if v, ok := c.opts.Context.Value(flagSetNameKey{}).(string); ok {
-			isSet = true
-			flagSetName = v
-		}
-		if v, ok := c.opts.Context.Value(flagSetErrorHandlingKey{}).(flag.ErrorHandling); ok {
-			isSet = true
-			flagSetErrorHandling = v
-		}
-		if v, ok := c.opts.Context.Value(flagSetKey{}).(*flag.FlagSet); ok {
-			flagSet = v
-		}
-		if v, ok := c.opts.Context.Value(flagSetUsageKey{}).(func()); ok {
-			flagUsage = v
-		}
-		if v, ok := c.opts.Context.Value(flagEnvKey{}).(string); ok {
-			flagEnv = v
-		}
-	}
-	c.fset = flagSet
-
-	if isSet {
-		c.fset.Init(flagSetName, flagSetErrorHandling)
-	}
-	if flagUsage != nil {
-		c.fset.Usage = flagUsage
-	} else {
-		c.fset.Usage = c.usage
-	}
-	c.env = flagEnv
-
-	c.name = flagSetName
-}
-
 func NewConfig(opts ...config.Option) config.Config {
 	options := config.NewOptions(opts...)
 	if len(options.StructTag) == 0 {
 		options.StructTag = DefaultStructTag
 	}
-
+	return &flagConfig{opts: options}
-	c := &flagConfig{opts: options}
-	c.configure()
-
-	return c
 }

flag_test.go

@@ -2,7 +2,6 @@ package flag
 
 import (
 	"context"
-	"flag"
 	"os"
 	"testing"
 	"time"
@@ -19,34 +18,27 @@ func TestLoad(t *testing.T) {
 	os.Args = append(os.Args, "-time", time.RFC822)
 	os.Args = append(os.Args, "-metadata", "key=20")
 	os.Args = append(os.Args, "-components", "all=info,api=debug")
-	os.Args = append(os.Args, "-addr", "33,44")
-	os.Args = append(os.Args, "-badflag", "test")
 	type NestedConfig struct {
 		Value string `flag:"name=nested_value"`
 	}
 	type Config struct {
-		Time           time.Time         `flag:"name=time,desc='some time',default='02 Jan 06 15:04 MST'"`
-		Components     map[string]string `flag:"name=components,desc='components logging'"`
-		Metadata       map[string]int    `flag:"name=metadata,desc='some meta',default=''"`
-		Nested         *NestedConfig
 		Broker         string            `flag:"name=broker,desc='description with, comma',default='127.0.0.1:9092'"`
-		WithoutDesc    string        `flag:"name=without_desc,default='without_default'"`
+		Verbose        bool              `flag:"name=verbose,desc='verbose output',default='false'"`
-		WithoutAll     string        `flag:"name=without_all"`
-		WithoutDefault string        `flag:"name=without_default,desc='with'"`
 		Addr           []string          `flag:"name=addr,desc='addrs',default='127.0.0.1:9092'"`
 		Wait           time.Duration     `flag:"name=wait,desc='wait time',default='2s'"`
-		Verbose        bool          `flag:"name=verbose,desc='verbose output',default='false'"`
+		Time           time.Time         `flag:"name=time,desc='some time',default='02 Jan 06 15:04 MST'"`
+		Metadata       map[string]int    `flag:"name=metadata,desc='some meta',default=''"`
+		WithoutDefault string            `flag:"name=without_default,desc='with'"`
+		WithoutDesc    string            `flag:"name=without_desc,default='without_default'"`
+		WithoutAll     string            `flag:"name=without_all"`
+		Components     map[string]string `flag:"name=components,desc='components logging'"`
+		Nested         *NestedConfig
 	}
 
 	ctx := context.Background()
 	cfg := &Config{Nested: &NestedConfig{}}
 
-	c := NewConfig(config.Struct(cfg), TimeFormat(time.RFC822), FlagErrorHandling(flag.ContinueOnError))
+	c := NewConfig(config.Struct(cfg), TimeFormat(time.RFC822))
-	if err := c.Init(); err != nil {
-		t.Fatalf("init failed: %v", err)
-	}
-
-	// double init test
 	if err := c.Init(); err != nil {
 		t.Fatalf("init failed: %v", err)
 	}

go.mod

@@ -1,16 +1,5 @@
 module go.unistack.org/micro-config-flag/v3
 
-go 1.22
+go 1.16
 
-toolchain go1.23.1
+require go.unistack.org/micro/v3 v3.9.1
-
-require go.unistack.org/micro/v3 v3.11.14
-
-require (
-	dario.cat/mergo v1.0.1 // indirect
-	github.com/google/go-cmp v0.6.0 // indirect
-	github.com/google/uuid v1.6.0 // indirect
-	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
-	google.golang.org/protobuf v1.35.2 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
-)

go.sum

@@ -1,17 +1,159 @@
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options.go

@@ -1,8 +1,6 @@
 package flag
 
 import (
-	"flag"
-
 	"go.unistack.org/micro/v3/config"
 )
 
@@ -26,39 +24,3 @@ type timeFormatKey struct{}
 func TimeFormat(s string) config.Option {
 	return config.SetOption(timeFormatKey{}, s)
 }
-
-type flagSetKey struct{}
-
-// FlagSet set flag set name
-func FlagSet(f *flag.FlagSet) config.Option {
-	return config.SetOption(flagSetKey{}, f)
-}
-
-type flagSetNameKey struct{}
-
-// FlagSetName set flag set name
-func FlagSetName(n string) config.Option {
-	return config.SetOption(flagSetNameKey{}, n)
-}
-
-type flagSetErrorHandlingKey struct{}
-
-// FlagErrorHandling set flag set error handling
-func FlagErrorHandling(eh flag.ErrorHandling) config.Option {
-	return config.SetOption(flagSetErrorHandlingKey{}, eh)
-}
-
-type flagSetUsageKey struct{}
-
-// FlagUsage set flag set usage func
-func FlagUsage(fn func()) config.Option {
-	return config.SetOption(flagSetUsageKey{}, fn)
-}
-
-
-type flagEnvKey struct{}
-
-// FlagEnv set flag set usage func
-func FlagEnv(n string) config.Option {
-	return config.SetOption(flagEnvKey{}, n)
-}

util.go

@@ -10,12 +10,12 @@ import (
 )
 
 type mapValue struct {
+	v     reflect.Value
 	delim string
 	def   string
-	v     reflect.Value
 }
 
-func (v *mapValue) String() string {
+func (v mapValue) String() string {
 	if v.v.Kind() != reflect.Invalid {
 		var kv []string
 		it := v.v.MapRange()
@@ -29,11 +29,7 @@ func (v *mapValue) String() string {
 	return v.def
 }
 
-func (v *mapValue) Get() interface{} {
+func (v mapValue) Set(s string) error {
-	return v.v.Interface()
-}
-
-func (v *mapValue) Set(s string) error {
 	ps := strings.Split(s, v.delim)
 	if len(ps) == 0 {
 		return nil
@@ -71,12 +67,12 @@ func (v *mapValue) Set(s string) error {
 }
 
 type sliceValue struct {
+	v     reflect.Value
 	delim string
 	def   string
-	v     reflect.Value
 }
 
-func (v *sliceValue) String() string {
+func (v sliceValue) String() string {
 	if v.v.Kind() != reflect.Invalid {
 		var kv []string
 		for idx := 0; idx < v.v.Len(); idx++ {
@@ -87,11 +83,7 @@ func (v *sliceValue) String() string {
 	return v.def
 }
 
-func (v *sliceValue) Get() interface{} {
+func (v sliceValue) Set(s string) error {
-	return v.v.Interface()
-}
-
-func (v *sliceValue) Set(s string) error {
 	p := strings.Split(s, v.delim)
 	v.v.Set(reflect.MakeSlice(v.v.Type(), len(p), len(p)))
 	switch v.v.Type().Elem().Kind() {
@@ -325,7 +317,6 @@ func (c *flagConfig) flagFloat64(v reflect.Value, fn, fv, fd string) error {
 	return nil
 }
 
-/*
 func (c *flagConfig) flagStringSlice(v reflect.Value, fn, fv, fd string) error {
 	nv, ok := v.Addr().Interface().(*string)
 	if !ok {
@@ -334,7 +325,6 @@ func (c *flagConfig) flagStringSlice(v reflect.Value, fn, fv, fd string) error {
 	flag.StringVar(nv, fn, fv, fd)
 	return nil
 }
-*/
 
 func getFlagOpts(tf string) (string, string, string) {
 	var name, desc, def string