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Aug 14, 2025
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Add examples/basic/flags/double_dashes_permitted.go #938

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27 changes: 14 additions & 13 deletions examples/basic/flags/README.md
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Expand Up @@ -2,16 +2,17 @@

このディレクトリには以下のサンプルがあります。

| file | example name | note |
| ------------- | ---------------- | ----------------------------------------------------------------- |
| flagset.go | flags_flagset | flag.Flagset のサンプルです |
| var.go | flags_var | flag.Var() のサンプルです |
| var2.go | flags_var2 | flag.Var() のサンプルです。(2) 同じオプションを複数回指定。 |
| int.go | flags_int | flag.Int(), flag.IntVar() のサンプルです |
| bool.go | flags_bool | flag.Bool(), flag.BoolVar() のサンプルです |
| string.go | flags_string | flag.String(), flag.StringVar() のサンプルです |
| duration.go | flags_duration | flag.Duration(), flag.DurationVar() のサンプルです |
| func.go | flags_func | flag.Func() のサンプルです |
| textvar.go | flags_textvar | flag.TextVar() のサンプルです |
| nargs.go | flags_nargs | flag.Arg(), flag.Args(), flag.NArg(), flag.NFlag() のサンプルです |
| subcommand.go | flags_subcommand | flagパッケージを使ってサブコマンドを実現するサンプルです |
| file | example name | note |
| -------------------------- | ------------------- | ------------------------------------------------------------------------------------ |
| flagset.go | flags_flagset | flag.Flagset のサンプルです |
| var.go | flags_var | flag.Var() のサンプルです |
| var2.go | flags_var2 | flag.Var() のサンプルです。(2) 同じオプションを複数回指定。 |
| int.go | flags_int | flag.Int(), flag.IntVar() のサンプルです |
| bool.go | flags_bool | flag.Bool(), flag.BoolVar() のサンプルです |
| string.go | flags_string | flag.String(), flag.StringVar() のサンプルです |
| duration.go | flags_duration | flag.Duration(), flag.DurationVar() のサンプルです |
| func.go | flags_func | flag.Func() のサンプルです |
| textvar.go | flags_textvar | flag.TextVar() のサンプルです |
| nargs.go | flags_nargs | flag.Arg(), flag.Args(), flag.NArg(), flag.NFlag() のサンプルです |
| subcommand.go | flags_subcommand | flagパッケージを使ってサブコマンドを実現するサンプルです |
| double_dashes_permitted.go | flags_double_dashes | flagパッケージにてデフォルトで "--flag" の指定が許容されていることを示すサンプルです |
59 changes: 59 additions & 0 deletions examples/basic/flags/double_dashes_permitted.go
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@@ -0,0 +1,59 @@
package flags

import (
"flag"

"github.com/devlights/gomy/output"
)

// DoubleDashesPermitted は、flagパッケージにてデフォルトで "--flag" の指定が許容されていることを示すサンプルです。
//
// flagパッケージのドキュメントにて以下の形が許容されると記載があります。
//
// -flag
// --flag
// -flag=x
// -flag x
//
// # REFERENCES
// - https://pkg.go.dev/flag@go1.25.0#hdr-Command_line_flag_syntax
func DoubleDashesPermitted() error {
var (
fs = flag.NewFlagSet("double-dashes", flag.ExitOnError)
f1 = fs.Int("flag1", 0, "")
f2 = fs.Int("flag2", 0, "")
f3 = fs.Bool("flag3", false, "")
f4 = fs.Bool("flag4", true, "")

argv = []string{"-flag1", "10", "--flag2=20", "--flag3", "-flag4=false"}

err error
)
if err = fs.Parse(argv); err != nil {
return err
}

output.Stdoutl("[flag1]", *f1)
output.Stdoutl("[flag2]", *f2)
output.Stdoutl("[flag3]", *f3)
output.Stdoutl("[flag4]", *f4)

return nil

/*
$ task

task: [build] go build -o "/workspace/try-golang/try-golang" .
task: [run] ./try-golang -onetime

ENTER EXAMPLE NAME: flags_double_dashes

[Name] "flags_double_dashes"
[flag1] 10
[flag2] 20
[flag3] true
[flag4] false

[Elapsed] 70.25µs
*/
}
1 change: 1 addition & 0 deletions examples/basic/flags/examples.go
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Expand Up @@ -24,4 +24,5 @@ func (r *register) Regist(m mapping.ExampleMapping) {
m["flags_textvar"] = TextVar
m["flags_nargs"] = Nargs
m["flags_subcommand"] = Subcommand
m["flags_double_dashes"] = DoubleDashesPermitted
}
18 changes: 10 additions & 8 deletions go.mod
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@@ -1,18 +1,20 @@
module github.com/devlights/try-golang

go 1.24
go 1.24.0

toolchain go1.24.4

require (
github.com/devlights/gomy v0.6.0
github.com/devlights/gomy v0.7.0
github.com/integrii/flaggy v1.5.2
github.com/pelletier/go-toml/v2 v2.2.4
github.com/shopspring/decimal v1.4.0
golang.org/x/crypto v0.40.0
golang.org/x/exp v0.0.0-20250718183923-645b1fa84792
golang.org/x/crypto v0.41.0
golang.org/x/exp v0.0.0-20250813145105-42675adae3e6
golang.org/x/sync v0.16.0
golang.org/x/sys v0.34.0
golang.org/x/term v0.33.0
golang.org/x/text v0.27.0
golang.org/x/sys v0.35.0
golang.org/x/term v0.34.0
golang.org/x/text v0.28.0
gopkg.in/ini.v1 v1.67.0
gopkg.in/natefinch/lumberjack.v2 v2.2.1
gopkg.in/yaml.v3 v3.0.1
Expand All @@ -23,7 +25,7 @@ require github.com/muesli/cancelreader v0.2.2
require (
github.com/devlights/fdpassing v1.0.1
github.com/prometheus/procfs v0.17.0
github.com/shirou/gopsutil/v4 v4.25.6
github.com/shirou/gopsutil/v4 v4.25.7
)

require (
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28 changes: 14 additions & 14 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -2,8 +2,8 @@ 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/devlights/fdpassing v1.0.1 h1:O9JBm3wpay8NIbjteVV7elZwtqi6ie+X1PbH1WR3y8Y=
github.com/devlights/fdpassing v1.0.1/go.mod h1:eNoNi77gbfz/CsUtmnH3kZ64HVcK3ttFsKYxJopSPZ4=
github.com/devlights/gomy v0.6.0 h1:7BT8bSxr+ZeNkgEYNufuM2rSc6kIoN6g2FSZvrcT9zw=
github.com/devlights/gomy v0.6.0/go.mod h1:d28qyQ+/s7JravMlss2kIFxWxhY2KLlpe7rIBZ5YKeA=
github.com/devlights/gomy v0.7.0 h1:HT1dv5Z176UOg3IpiWfSo16K4NtYIhviV7532maz72o=
github.com/devlights/gomy v0.7.0/go.mod h1:Wxcshi/eMUQPyqiFMWokpqX5ITTieRyd8h3PbBDcJBc=
github.com/ebitengine/purego v0.8.4 h1:CF7LEKg5FFOsASUj0+QwaXf8Ht6TlFxg09+S9wz0omw=
github.com/ebitengine/purego v0.8.4/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
Expand All @@ -28,8 +28,8 @@ github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 h1:o4JXh1EVt
github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
github.com/prometheus/procfs v0.17.0 h1:FuLQ+05u4ZI+SS/w9+BWEM2TXiHKsUQ9TADiRH7DuK0=
github.com/prometheus/procfs v0.17.0/go.mod h1:oPQLaDAMRbA+u8H5Pbfq+dl3VDAvHxMUOVhe0wYB2zw=
github.com/shirou/gopsutil/v4 v4.25.6 h1:kLysI2JsKorfaFPcYmcJqbzROzsBWEOAtw6A7dIfqXs=
github.com/shirou/gopsutil/v4 v4.25.6/go.mod h1:PfybzyydfZcN+JMMjkF6Zb8Mq1A/VcogFFg7hj50W9c=
github.com/shirou/gopsutil/v4 v4.25.7 h1:bNb2JuqKuAu3tRlPv5piSmBZyMfecwQ+t/ILq+1JqVM=
github.com/shirou/gopsutil/v4 v4.25.7/go.mod h1:XV/egmwJtd3ZQjBpJVY5kndsiOO4IRqy9TQnmm6VP7U=
github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=
github.com/shopspring/decimal v1.4.0/go.mod h1:gawqmDU56v4yIKSwfBSFip1HdCCXN8/+DMd9qYNcwME=
github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
Expand All @@ -40,21 +40,21 @@ github.com/tklauser/numcpus v0.10.0 h1:18njr6LDBk1zuna922MgdjQuJFjrdppsZG60sHGfj
github.com/tklauser/numcpus v0.10.0/go.mod h1:BiTKazU708GQTYF4mB+cmlpT2Is1gLk7XVuEeem8LsQ=
github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
golang.org/x/crypto v0.40.0 h1:r4x+VvoG5Fm+eJcxMaY8CQM7Lb0l1lsmjGBQ6s8BfKM=
golang.org/x/crypto v0.40.0/go.mod h1:Qr1vMER5WyS2dfPHAlsOj01wgLbsyWtFn/aY+5+ZdxY=
golang.org/x/exp v0.0.0-20250718183923-645b1fa84792 h1:R9PFI6EUdfVKgwKjZef7QIwGcBKu86OEFpJ9nUEP2l4=
golang.org/x/exp v0.0.0-20250718183923-645b1fa84792/go.mod h1:A+z0yzpGtvnG90cToK5n2tu8UJVP2XUATh+r+sfOOOc=
golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
golang.org/x/crypto v0.41.0/go.mod h1:pO5AFd7FA68rFak7rOAGVuygIISepHftHnr8dr6+sUc=
golang.org/x/exp v0.0.0-20250813145105-42675adae3e6 h1:SbTAbRFnd5kjQXbczszQ0hdk3ctwYf3qBNH9jIsGclE=
golang.org/x/exp v0.0.0-20250813145105-42675adae3e6/go.mod h1:4QTo5u+SEIbbKW1RacMZq1YEfOBqeXa19JeshGi+zc4=
golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201204225414-ed752295db88/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
golang.org/x/term v0.33.0 h1:NuFncQrRcaRvVmgRkvM3j/F00gWIAlcmlB8ACEKmGIg=
golang.org/x/term v0.33.0/go.mod h1:s18+ql9tYWp1IfpV9DmCtQDDSRBUjKaw9M1eAv5UeF0=
golang.org/x/text v0.27.0 h1:4fGWRpyh641NLlecmyl4LOe6yDdfaYNrGb2zdfo4JV4=
golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
golang.org/x/term v0.34.0 h1:O/2T7POpk0ZZ7MAzMeWFSg6S5IpWd/RXDlM9hgM3DR4=
golang.org/x/term v0.34.0/go.mod h1:5jC53AEywhIVebHgPVeg0mj8OD3VO9OzclacVrqpaAw=
golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
Expand Down
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