Merge pull request #21 from unistack-org/master

merge master

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: For reporting bugs in go-micro
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+1. What are you trying to do?
+2. What did you expect to happen?
+3. What happens instead?
+
+**How to reproduce the bug:**
+
+If possible, please include a minimal code snippet here.
+
+**Environment:**
+Go Version: please paste `go version` output here
+```
+please paste `go env` output here
+```

.github/ISSUE_TEMPLATE/feature-request---enhancement.md

@@ -0,0 +1,17 @@
+---
+name: Feature request / Enhancement
+about: If you have a need not served by go-micro
+title: "[FEATURE]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,14 @@
+---
+name: Question
+about: Ask a question about go-micro
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Before asking, please check if your question has already been answered: 
+
+1. Check the documentation - https://micro.mu/docs/
+2. Check the examples and plugins - https://github.com/micro/examples & https://github.com/micro/go-plugins
+3. Search existing issues

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+## Pull Request template
+Please, go through these steps before clicking submit on this PR.
+
+1. Give a descriptive title to your PR.
+2. Provide a description of your changes.
+3. Make sure you have some relevant tests.
+4. Put `closes #XXXX` in your comment to auto-close the issue that your PR fixes (if applicable).
+
+**PLEASE REMOVE THIS TEMPLATE BEFORE SUBMITTING**

.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/build.yml

@@ -0,0 +1,46 @@
+name: build
+on:
+ push:
+    branches:
+    - master
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: cache
+      uses: actions/cache@v2
+      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@v2
+      - name: lint
+        uses: golangci/golangci-lint-action@v2
+        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@v2
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+    # 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 +1,31 @@
+name: "prautomerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    steps:
+      - name: metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.1.1
+        with:
+          github-token: "${{ secrets.TOKEN }}"
+      - name: approve
+        run: gh pr review --approve "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}
+      - name: 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 +1,46 @@
+name: prbuild
+on:
+  pull_request:
+    branches:
+    - master
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: cache
+      uses: actions/cache@v2
+      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@v2
+      - name: lint
+        uses: golangci/golangci-lint-action@v2
+        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

flag.go

@@ -1,21 +1,31 @@
-package flag
+package flag // import "go.unistack.org/micro-config-flag/v3"
 
 import (
 	"context"
 	"errors"
 	"flag"
+	"fmt"
 	"reflect"
-	"strconv"
+	"time"
 
-	"github.com/unistack-org/micro/v3/config"
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
+	"go.unistack.org/micro/v3/config"
+	rutil "go.unistack.org/micro/v3/util/reflect"
 )
 
 var (
-	DefaultStructTag = "flag"
-	ErrInvalidStruct = errors.New("invalid struct specified")
+	DefaultStructTag  = "flag"
+	ErrInvalidValue   = errors.New("invalid value specified")
+	DefaultSliceDelim = ","
+	DefaultMapDelim   = ","
 )
 
+/*
+var (
+	timeTimeKind     = reflect.TypeOf(time.Time{}).Kind()
+	timeDurationKind = reflect.TypeOf(time.Duration(0)).Kind()
+)
+*/
+
 type flagConfig struct {
 	opts config.Options
 }
@@ -41,26 +51,74 @@ func (c *flagConfig) Init(opts ...config.Option) error {
 		}
 		fn, fv, fd := getFlagOpts(tf)
 
+		rcheck := true
+
+		switch sf.Value.Interface().(type) {
+		case time.Duration:
+			err = c.flagDuration(sf.Value, fn, fv, fd)
+			rcheck = false
+		case time.Time:
+			err = c.flagTime(sf.Value, fn, fv, fd)
+			rcheck = false
+		}
+
+		if err != nil {
+			c.opts.Logger.Errorf(c.opts.Context, "flag init error: %v", err)
+			if !c.opts.AllowFail {
+				return err
+			}
+			return nil
+		}
+
+		if !rcheck {
+			continue
+		}
+
+		if sf.Value.Kind() == reflect.Ptr {
+			sf.Value = sf.Value.Elem()
+		}
+
 		switch sf.Value.Kind() {
 		case reflect.String:
-			v := sf.Value.Addr().Interface().(*string)
-			flag.StringVar(v, fn, fv, fd)
+			err = c.flagString(sf.Value, fn, fv, fd)
 		case reflect.Bool:
-			v := sf.Value.Addr().Interface().(*bool)
-			i, _ := strconv.ParseBool(fv)
-			flag.BoolVar(v, fn, i, fd)
+			err = c.flagBool(sf.Value, fn, fv, fd)
+		case reflect.Int:
+			err = c.flagInt(sf.Value, fn, fv, fd)
+		case reflect.Int64:
+			err = c.flagInt64(sf.Value, fn, fv, fd)
+		case reflect.Float64:
+			err = c.flagFloat64(sf.Value, fn, fv, fd)
+		case reflect.Uint:
+			err = c.flagUint(sf.Value, fn, fv, fd)
+		case reflect.Uint64:
+			err = c.flagUint64(sf.Value, fn, fv, fd)
+		case reflect.Slice:
+			err = c.flagSlice(sf.Value, fn, fv, fd)
+		case reflect.Map:
+			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
+			}
+			return nil
 		}
 	}
 
 	return nil
 }
 
-func (c *flagConfig) Load(ctx context.Context) error {
+func (c *flagConfig) Load(ctx context.Context, opts ...config.LoadOption) error {
+	options := config.NewLoadOptions(opts...)
+	_ = options
+	// TODO: allow merge, append and so
 	flag.Parse()
 	return nil
 }
 
-func (c *flagConfig) Save(ctx context.Context) error {
+func (c *flagConfig) Save(ctx context.Context, opts ...config.SaveOption) error {
 	return nil
 }
 
@@ -72,6 +130,10 @@ func (c *flagConfig) Name() string {
 	return c.opts.Name
 }
 
+func (c *flagConfig) Watch(ctx context.Context, opts ...config.WatchOption) (config.Watcher, error) {
+	return nil, fmt.Errorf("not implemented")
+}
+
 func NewConfig(opts ...config.Option) config.Config {
 	options := config.NewOptions(opts...)
 	if len(options.StructTag) == 0 {

flag_test.go

@@ -1,49 +1,47 @@
 package flag
 
 import (
-	"flag"
+	"context"
 	"os"
-	"reflect"
-	"strconv"
 	"testing"
+	"time"
 
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
+	"go.unistack.org/micro/v3/config"
 )
 
 func TestLoad(t *testing.T) {
+	time.Local = time.UTC
 	os.Args = append(os.Args, "-broker", "5566:33")
-	type config struct {
-		Broker  string `flag:"name=broker,desc='description with, comma',default='127.0.0.1:9092'"`
-		Verbose bool   `flag:"name=verbose,desc='verbose output',default='false value'"`
+	os.Args = append(os.Args, "-verbose")
+	os.Args = append(os.Args, "-wait", "5s")
+	os.Args = append(os.Args, "-addr", "33,44")
+	os.Args = append(os.Args, "-time", time.RFC822)
+	os.Args = append(os.Args, "-metadata", "key=20")
+	type Config struct {
+		Broker   string         `flag:"name=broker,desc='description with, comma',default='127.0.0.1:9092'"`
+		Verbose  bool           `flag:"name=verbose,desc='verbose output',default='false'"`
+		Addr     []string       `flag:"name=addr,desc='addrs',default='127.0.0.1:9092'"`
+		Wait     time.Duration  `flag:"name=wait,desc='wait time',default='2s'"`
+		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=''"`
 	}
 
-	cfg := &config{}
+	ctx := context.Background()
+	cfg := &Config{}
 
-	fields, err := rutil.StructFields(cfg)
-	if err != nil {
-		t.Fatal(err)
+	c := NewConfig(config.Struct(cfg), TimeFormat(time.RFC822))
+	if err := c.Init(); err != nil {
+		t.Fatalf("init failed: %v", err)
 	}
 
-	for _, sf := range fields {
-		tf, ok := sf.Field.Tag.Lookup("flag")
-		if !ok {
-			continue
-		}
-		fn, fv, fd := getFlagOpts(tf)
-
-		switch sf.Value.Kind() {
-		case reflect.String:
-			v := sf.Value.Addr().Interface().(*string)
-			flag.StringVar(v, fn, fv, fd)
-		case reflect.Bool:
-			v := sf.Value.Addr().Interface().(*bool)
-			i, _ := strconv.ParseBool(fv)
-			flag.BoolVar(v, fn, i, fd)
-		}
+	if err := c.Load(ctx); err != nil {
+		t.Fatalf("load failed: %v", err)
 	}
 
-	flag.Parse()
 	if cfg.Broker != "5566:33" {
 		t.Fatalf("failed to parse flags broker value invalid: %#+v", cfg)
 	}
+	if tf := cfg.Time.Format(time.RFC822); tf != "02 Jan 06 15:04 MST" {
+		t.Fatalf("parse time error: %s != %s", tf, "02 Jan 06 15:04 MST")
+	}
 }

go.mod

@@ -1,5 +1,5 @@
-module github.com/unistack-org/micro-config-flag/v3
+module go.unistack.org/micro-config-flag/v3
 
 go 1.16
 
-require github.com/unistack-org/micro/v3 v3.3.22
+require go.unistack.org/micro/v3 v3.8.15

go.sum

@@ -1,18 +1,28 @@
-github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/ef-ds/deque v1.0.4/go.mod h1:gXDnTC3yqvBcHbq2lcExjtAcVrOnJCbMcZXmuj8Z4tg=
-github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/golang-jwt/jwt/v4 v4.2.0/go.mod h1:/xlHOz8bRuivTWchD4jCa+NbatV+wEUSzwAxVc6locg=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/imdario/mergo v0.3.12 h1:b6R2BslTbIEToALKP7LxUvijTsNI9TAe80pLWN2g/HU=
 github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
-github.com/silas/dag v0.0.0-20210121180416-41cf55125c34/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
-github.com/unistack-org/micro/v3 v3.3.22 h1:4mY+lhqW6N/3A0LSfAnGHE65TakGOrbU144/FQEjZIs=
-github.com/unistack-org/micro/v3 v3.3.22/go.mod h1:LXmPfbJnJNvL0kQs8HfnkV3Wya2Wb+C7keVq++RCZnk=
-golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
+go.unistack.org/micro-proto/v3 v3.1.1 h1:78qRmltwGek5kSQ9tNmDZ9TCRvZM7YDIOgzriKvabjA=
+go.unistack.org/micro-proto/v3 v3.1.1/go.mod h1:DpRhYCBXlmSJ/AAXTmntvlh7kQkYU6eFvlmYAx4BQS8=
+go.unistack.org/micro/v3 v3.8.15 h1:9KzaPmWW4CpThOT8tiq8XEG3YLmVV8hztqnzPBmJudQ=
+go.unistack.org/micro/v3 v3.8.15/go.mod h1:zEbgew93bFhU+gANJubbbnPP1LtDTQRbM/17QXTbTrY=
+golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

options.go

@@ -0,0 +1,26 @@
+package flag
+
+import (
+	"go.unistack.org/micro/v3/config"
+)
+
+type sliceDelimKey struct{}
+
+// SliceDelim set the slice delimeter
+func SliceDelim(s string) config.Option {
+	return config.SetOption(sliceDelimKey{}, s)
+}
+
+type mapDelimKey struct{}
+
+// MapDelim set the map delimeter
+func MapDelim(s string) config.Option {
+	return config.SetOption(mapDelimKey{}, s)
+}
+
+type timeFormatKey struct{}
+
+// TimeFormat set the time format
+func TimeFormat(s string) config.Option {
+	return config.SetOption(timeFormatKey{}, s)
+}

util.go

@@ -1,9 +1,281 @@
 package flag
 
 import (
+	"flag"
+	"reflect"
+	"strconv"
 	"strings"
+	"time"
 )
 
+func convertType(v reflect.Value, t reflect.Kind) (reflect.Value, error) {
+	switch v.Kind() {
+	case reflect.String:
+		switch t {
+		case reflect.String:
+			return v, nil
+		case reflect.Int, reflect.Int64:
+			i, err := strconv.ParseInt(v.String(), 10, 64)
+			if err != nil {
+				return v, err
+			}
+			return reflect.ValueOf(i), nil
+		case reflect.Uint, reflect.Uint64:
+			i, err := strconv.ParseUint(v.String(), 10, 64)
+			if err != nil {
+				return v, err
+			}
+			return reflect.ValueOf(i), nil
+		case reflect.Float64:
+			i, err := strconv.ParseFloat(v.String(), 64)
+			if err != nil {
+				return v, err
+			}
+			return reflect.ValueOf(i), nil
+		case reflect.Bool:
+			i, err := strconv.ParseBool(v.String())
+			if err != nil {
+				return v, err
+			}
+			return reflect.ValueOf(i), nil
+		}
+	}
+	return v, ErrInvalidValue
+}
+
+func (c *flagConfig) flagSlice(v reflect.Value, fn, fv, fd string) error {
+	delim := DefaultSliceDelim
+	if c.opts.Context != nil {
+		if d, ok := c.opts.Context.Value(sliceDelimKey{}).(string); ok {
+			delim = d
+		}
+	}
+
+	flag.Func(fn, fd, func(s string) error {
+		p := strings.Split(s, delim)
+		v.Set(reflect.MakeSlice(v.Type(), len(p), len(p)))
+		switch v.Type().Elem().Kind() {
+		case reflect.Int, reflect.Int64:
+			for idx := range p {
+				i, err := strconv.ParseInt(p[idx], 10, 64)
+				if err != nil {
+					return err
+				}
+				v.Index(idx).SetInt(i)
+			}
+		case reflect.Uint, reflect.Uint64:
+			for idx := range p {
+				i, err := strconv.ParseUint(p[idx], 10, 64)
+				if err != nil {
+					return err
+				}
+				v.Index(idx).SetUint(i)
+			}
+		case reflect.Float64:
+			for idx := range p {
+				i, err := strconv.ParseFloat(p[idx], 64)
+				if err != nil {
+					return err
+				}
+				v.Index(idx).SetFloat(i)
+			}
+		case reflect.Bool:
+			for idx := range p {
+				i, err := strconv.ParseBool(p[idx])
+				if err != nil {
+					return err
+				}
+				v.Index(idx).SetBool(i)
+			}
+		case reflect.String:
+			for idx := range p {
+				v.Index(idx).SetString(p[idx])
+			}
+		}
+		return nil
+	})
+
+	return nil
+}
+
+func (c *flagConfig) flagMap(v reflect.Value, fn, fv, fd string) error {
+	delim := DefaultMapDelim
+	if c.opts.Context != nil {
+		if d, ok := c.opts.Context.Value(mapDelimKey{}).(string); ok {
+			delim = d
+		}
+	}
+	flag.Func(fn, fd, func(s string) error {
+		ps := strings.Split(s, delim)
+		if len(ps) == 0 {
+			return nil
+		}
+		v.Set(reflect.MakeMapWithSize(v.Type(), len(ps)))
+		kt := v.Type().Key().Kind()
+		vt := v.Type().Elem().Kind()
+
+		for i := 0; i < len(ps); i++ {
+			fs := strings.Split(ps[i], "=")
+			switch len(fs) {
+			case 0:
+				return nil
+			case 1:
+				if len(fs[0]) == 0 {
+					return nil
+				}
+				return ErrInvalidValue
+			case 2:
+				break
+			default:
+				return ErrInvalidValue
+			}
+			key, err := convertType(reflect.ValueOf(fs[0]), kt)
+			if err != nil {
+				return err
+			}
+			val, err := convertType(reflect.ValueOf(fs[1]), vt)
+			if err != nil {
+				return err
+			}
+			v.SetMapIndex(key.Convert(v.Type().Key()), val.Convert(v.Type().Elem()))
+		}
+		return nil
+	})
+
+	return nil
+}
+
+func (c *flagConfig) flagTime(v reflect.Value, fn, fv, fd string) error {
+	var format string
+	if c.opts.Context != nil {
+		if tf, ok := c.opts.Context.Value(timeFormatKey{}).(string); ok {
+			format = tf
+		}
+	}
+	if format == "" {
+		return ErrInvalidValue
+	}
+	flag.Func(fn, fd, func(s string) error {
+		t, err := time.Parse(s, format)
+		if err != nil {
+			return err
+		}
+		v.Set(reflect.ValueOf(t))
+		return nil
+	})
+
+	return nil
+}
+
+func (c *flagConfig) flagDuration(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*time.Duration)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := time.ParseDuration(fd)
+	if err != nil {
+		return err
+	}
+	flag.DurationVar(nv, fn, i, fd)
+	return nil
+}
+
+func (c *flagConfig) flagBool(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*bool)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := strconv.ParseBool(fd)
+	if err != nil {
+		return err
+	}
+	flag.BoolVar(nv, fn, i, fd)
+	return nil
+}
+
+func (c *flagConfig) flagString(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*string)
+	if !ok {
+		return ErrInvalidValue
+	}
+	flag.StringVar(nv, fn, fv, fd)
+	return nil
+}
+
+func (c *flagConfig) flagInt(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*int)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := strconv.ParseInt(fd, 10, 64)
+	if err != nil {
+		return err
+	}
+	flag.IntVar(nv, fn, int(i), fd)
+	return nil
+}
+
+func (c *flagConfig) flagInt64(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*int64)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := strconv.ParseInt(fd, 10, 64)
+	if err != nil {
+		return err
+	}
+	flag.Int64Var(nv, fn, int64(i), fd)
+	return nil
+}
+
+func (c *flagConfig) flagUint(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*uint)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := strconv.ParseUint(fd, 10, 64)
+	if err != nil {
+		return err
+	}
+	flag.UintVar(nv, fn, uint(i), fd)
+	return nil
+}
+
+func (c *flagConfig) flagUint64(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*uint64)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := strconv.ParseUint(fd, 10, 64)
+	if err != nil {
+		return err
+	}
+	flag.Uint64Var(nv, fn, uint64(i), fd)
+	return nil
+}
+
+func (c *flagConfig) flagFloat64(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*float64)
+	if !ok {
+		return ErrInvalidValue
+	}
+	i, err := strconv.ParseFloat(fd, 64)
+	if err != nil {
+		return err
+	}
+	flag.Float64Var(nv, fn, float64(i), fd)
+	return nil
+}
+
+func (c *flagConfig) flagStringSlice(v reflect.Value, fn, fv, fd string) error {
+	nv, ok := v.Addr().Interface().(*string)
+	if !ok {
+		return ErrInvalidValue
+	}
+	flag.StringVar(nv, fn, fv, fd)
+	return nil
+}
+
 func getFlagOpts(tf string) (string, string, string) {
 	ret := make([]string, 3)
 	vals := strings.Split(tf, ",")