cli
Simple, intuitive CLI framework for Go pkg.go.dev/go.followtheprocess.codes/cli
go cli
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Version history of option.go

August 2026

renovate[bot]
Lock file maintenance (#222)
committed

June 2026

followtheprocess.codes
Add tangled workflows and update linter config
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April 2026

Tom Fleet
Eliminate a few more allocs (#214)
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followtheprocess.codes
Tidy up a few bits
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Tom Fleet
Allow associating env vars with flags (#200)
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November 2025

followtheprocess.codes
Breaking: Change the way flags are configured to be consistent with Args (#186)
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followtheprocess.codes
Breaking: Change the signature of cmd.Run to pass a context.Context (#185)
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followtheprocess.codes
Breaking: Completely rework how positional arguments are handled (#178)
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followtheprocess.codes
Breaking: Move FlagCount and Flaggable to a public flag package (#177)
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September 2025

followtheprocess.codes
Use hue for colouring and style (#171)
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June 2025

followtheprocess.codes
Migrate this project to the vanity URL (#162)
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February 2025

followtheprocess.codes
Remove the ability to set a custom VersionFunc (#148)
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followtheprocess.codes
Better document flaggable types as well as general usage (#147)
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followtheprocess.codes
Allow `Count` flags to be directly passed an argument e.g. `--verbosity=3` (#146)
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followtheprocess.codes
Add `t.Parallel()` to all tests and subtests (#141)
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followtheprocess.codes
Refactor `internal/flag` for less pointer dereferencing (#139)
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January 2025

followtheprocess.codes
Tidy up some doc comments (#135)
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followtheprocess.codes
A flag with a non-zero default value will now show the default in the help (#133)
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followtheprocess.codes
Update and refresh golangci-lint config (#130)
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followtheprocess.codes
Add a `cli.NoColour` option for disabling all colour/style (#122)
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followtheprocess.codes
Replace `Arg` with `RequiredArg` and `OptionalArg` and update help text (#121)
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followtheprocess.codes
`cli.Short` and `cli.Long` now strip leading and trailing whitespace (#120)
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December 2024

followtheprocess.codes
Fix docs for Arg
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November 2024

followtheprocess.codes
Fix an issue where cli.FlagCount wasn't being parsed correctly (#116)
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October 2024

followtheprocess.codes
No longer error if e.g `cli.Version` is passed an empty string (#111)
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September 2024

followtheprocess.codes
Add the ability to name positional arguments (#100)
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followtheprocess.codes
Change the type aliases for true new types (#99)
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followtheprocess.codes
Rename the `Args` option to `OverrideArgs` (#98)
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followtheprocess.codes
Reduce memory allocation in cli.New (#96)
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August 2024

followtheprocess.codes
Change SubCommands to take a function for easier error handling (#85)
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followtheprocess.codes
Add support for setting build info via ldflags (#83)
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followtheprocess.codes
Handle flag name or shorthand collisions (#78)
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followtheprocess.codes
Implement a count style flag e.g. `-vvv` (#77)
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followtheprocess.codes
Address some simple todos (#73)
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followtheprocess.codes
Calling Execute on a non-root command is now an error (#69)
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followtheprocess.codes
Handle missing subcommand and run function in New (#65)
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followtheprocess.codes
Remove pflag and rely on our own flag set (#61)
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July 2024

followtheprocess.codes
Refactor adding flag to a set (#53)
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followtheprocess.codes
Start parsing our own flags (#50)
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followtheprocess.codes
Add an implementation of flag set into commands (#49)
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followtheprocess.codes
Re-export Flaggable from top level package (#48)
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followtheprocess.codes
Alias flag.NoShortHand to cli.NoShortHand so it's exported (#47)
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followtheprocess.codes
Make flag shorthand a rune so bad values are a compile time error (#46)
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followtheprocess.codes
Add strict validation for flag names and shorthands (#45)
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followtheprocess.codes
Better docs for the subcommand option (#40)
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followtheprocess.codes
Add more validation and spruce up README (#39)
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followtheprocess.codes
Add some more TODOs
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followtheprocess.codes
Add protection against duplicate subcommands and flags (#38)
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followtheprocess.codes
Add option validation now we can handle errors properly (#37)
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followtheprocess.codes
cli.New now returns an error (#35)
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