flaggy
Idiomatic Go input parsing with subcommands, positional values, and flags at any position. No required project or package layout and no external dependencies. (by integrii)
pflag
Drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags. (by spf13)
Our great sponsors
| flaggy | pflag | |
|---|---|---|
| 1 | 13 | |
| 846 | 2,298 | |
| - | - | |
| 0.0 | 0.0 | |
| about 1 year ago | about 1 month ago | |
| Go | Go | |
| The Unlicense | BSD 3-clause "New" or "Revised" License |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
flaggy
Posts with mentions or reviews of flaggy.
We have used some of these posts to build our list of alternatives
and similar projects.
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Return error if an command line argument does not exist in the program
Maybe the flaggy package can do this easily, but if there is a way with the standard flag package it would be best.
pflag
Posts with mentions or reviews of pflag.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-05-07.
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issue with pflag flagset
My understanding is that you can use pflag as a drop in replacement of the standard lib's flag (import flag "github.com/spf13/pflag"). So it can be used as a standalone lib I suppose.
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Which packages do you recommend for building cli tools?
I realy enjoyed the patched version from spf13 with "--" support https://github.com/spf13/pflag
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Define custom command-line flag types in Go 1.19
Nice, but Cobra (with pflag underneath) is so, so better.
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-h --help -help help --? -? ????
Not by default on stdlib. There are libraries available though - https://github.com/spf13/pflag
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Coral, a friendly Cobra fork with nearly all its features, but only 4 dependencies
Flag functionality is provided by the pflag library, a fork of the flag standard library which maintains the same interface while adding POSIX compliance.
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xflags: An approach to command line flags with support for subcommands, positional args, environment variables, etc.
How does it compare to https://github.com/spf13/pflag ?
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The flag package: strange but good?
spf13 has a drop in pflag that does the - short and -- long flags.
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What are your favorite packages to use?
oklog/ulid to generate IDs. coreos/go-oidc for validating JWTs I get from auth. google/go-cmp for comparing structs in tests (unless the project is already using Testify). spf13/pflag because life's too short for Go's flag handling. getkin/kin-openapi for validating reqests/responses against my OpenAPI spec (in tests).
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akamensky/argparse: Argparse for Golang. Just because "flag" sucks!
What are the benefits of this package over the widely used spf13/pflag?
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Go’s highly modular nature makes it particularly good for situations where requirements are changing or evolving.
3
What are some alternatives?
When comparing flaggy and pflag you can also consider the following projects:
cobra - A Commander for modern Go CLI interactions
flag - Flag is a simple but powerful command line option parsing library for Go support infinite level subcommand
urfave/cli - A simple, fast, and fun package for building command line apps in Go
go-flags - go command line option parser
kingpin - CONTRIBUTIONS ONLY: A Go (golang) command line and flag parser
Dnote - A simple command line notebook for programmers
cmdr - POSIX-compliant command-line UI (CLI) parser and Hierarchical-configuration operations
complete - bash completion written in go + bash completion for go command
acmd - Simple, useful and opinionated CLI package in Go.
argparse - Argparse for golang. Just because `flag` sucks