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Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
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Василий Толстов 2021-06-18 16:46:56 +03:00
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# Develop tools
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# Binaries for programs and plugins
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# Folders
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# Architecture specific extensions/prefixes
*.[568vq]
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flag.go Normal file
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package flag
import (
"context"
"errors"
"flag"
"reflect"
"strconv"
"github.com/unistack-org/micro/v3/config"
rutil "github.com/unistack-org/micro/v3/util/reflect"
)
var (
DefaultStructTag = "flag"
ErrInvalidStruct = errors.New("invalid struct specified")
)
type flagConfig struct {
opts config.Options
}
func (c *flagConfig) Options() config.Options {
return c.opts
}
func (c *flagConfig) Init(opts ...config.Option) error {
for _, o := range opts {
o(&c.opts)
}
fields, err := rutil.StructFields(c.opts.Struct)
if err != nil {
return err
}
for _, sf := range fields {
tf, ok := sf.Field.Tag.Lookup(c.opts.StructTag)
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)
}
}
return nil
}
func (c *flagConfig) Load(ctx context.Context) error {
flag.Parse()
return nil
}
func (c *flagConfig) Save(ctx context.Context) error {
return nil
}
func (c *flagConfig) String() string {
return "flag"
}
func (c *flagConfig) Name() string {
return c.opts.Name
}
func NewConfig(opts ...config.Option) config.Config {
options := config.NewOptions(opts...)
if len(options.StructTag) == 0 {
options.StructTag = DefaultStructTag
}
return &flagConfig{opts: options}
}

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flag_test.go Normal file
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package flag
import (
"flag"
"os"
"reflect"
"strconv"
"testing"
rutil "github.com/unistack-org/micro/v3/util/reflect"
)
func TestLoad(t *testing.T) {
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'"`
}
cfg := &config{}
fields, err := rutil.StructFields(cfg)
if err != nil {
t.Fatal(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)
}
}
flag.Parse()
if cfg.Broker != "5566:33" {
t.Fatalf("failed to parse flags broker value invalid: %#+v", cfg)
}
}

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module github.com/unistack-org/micro-config-flag/v3
go 1.16
require github.com/unistack-org/micro/v3 v3.3.22

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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/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=
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=
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=

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util.go Normal file
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package flag
import (
"strings"
)
func getFlagOpts(tf string) (string, string, string) {
ret := make([]string, 3)
vals := strings.Split(tf, ",")
f := 0
for _, val := range vals {
p := strings.Split(val, "=")
switch p[0] {
case "name":
f = 0
case "desc":
f = 1
case "default":
f = 2
default:
ret[f] += "," + val
continue
}
ret[f] = p[1]
}
for idx := range ret {
if ret[idx][0] == '\'' {
ret[idx] = ret[idx][1:]
}
if ret[idx][len(ret[idx])-1] == '\'' {
ret[idx] = ret[idx][:len(ret[idx])-1]
}
}
return ret[0], ret[1], ret[2]
}