guardrail
cobra
guardrail | cobra | |
---|---|---|
2 | 129 | |
513 | 35,985 | |
0.6% | - | |
9.3 | 7.8 | |
12 days ago | 8 days ago | |
Scala | Go | |
MIT License | Apache License 2.0 |
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guardrail
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Ask HN: Why is there no specification for Command Line Interfaces?
What's the use case? I was thinking about this exact issue because my product ships several CLI tools, but I wasn't convinced it would be worth the effort.
An OpenAPI specification describes an HTTP interface, and I see it as useful because it makes it easier to write code in language-of-choice to generate HTTP requests (by generating client libraries from the OpenAPI spec).
For a CLI, the interface is the command-line. Usually people type these commands, or they end up in bash scripts, or sometimes they get called from programming language of choice by shelling out to the CLI. So I could see a use case for a CLI spec, which would make it easier to generate client libraries (which would shell out to the CLI)... but it seems a little niche.
Or maybe, as input to a documentation tool (like Swagger docs). I would imagine if you're using a CLI library like Python's Click, most of that data is already there. Click Parameters documentation: https://click.palletsprojects.com/en/8.1.x/parameters/
Or maybe, you could start from the spec and then generate code which enforces it. So any changes pass through the spec, which would make it easy to write code (server and client-side) / documentation / changelogs. Some projects like this: Guardrail (Scala) https://github.com/guardrail-dev/guardrail , and Connexion (Python) https://github.com/spec-first/connexion .
But without this ecosystem of tooling, documenting your CLI in a specification didn't really seem worth the effort. Of course, that's a bootstrapping problem.
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Scala Library To Generate Case Classes for JSON
You may have some luck with Guardrail https://github.com/guardrail-dev/guardrail/
cobra
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The power of the CLI with Golang and Cobra CLI
We can use the flag with --date or -date, Go already does the automatic check. We can make our entire boilerplate with this approach, but let's make it a little easier and use the Cobra CLI package.
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Build your own curl in Golang
In this tutorial, we'll walk through the process of creating a simple command-line tool similar to curl using Go and Cobra, a CLI library for Go.
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Scripts should be written using the project main language
I use https://github.com/spf13/cobra religiously for this kind of thing - it handles all the annoying corner cases of parsing flags, and also has an intuitive notion of subcommands (with basic usage/help text generated) for picking which task you want to run with positional arguments.
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Command Line Interface Guidelines
We recently chose cobra[1] to create a cli application. It comes with so many best practices already packaged like autocompletions, help texts etc. etc.
[1]: https://github.com/spf13/cobra
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What 3rd-party libraries do you use often/all the time?
github.com/spf13/cobra
- O poder do CLI com Golang e Cobra CLI
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How to read Cobra command line flag
I looked at the docs: https://cobra.dev/ ... and there are only examples on how to add new flags.
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Dockerizing Golang CLI Tool - A Step-by-Step Guide
For installing Cobra-CLI you can go to Cobraor run go install github.com/spf13/cobra-cli@latest in the terminal.
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Packaging Go for Arch Linux Tutorial
In my build phase, I compile the source to create a k3sup binary and I also run the binary to generate shell script completions. Give kudos to this functionality which comes from spf13/cobra Go library for CLIs.
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Add License Headers to Your Code Files
NWA is a command-line tool built on cobra. Here's an overview of NWA's commands:
What are some alternatives?
typespec
urfave/cli - A simple, fast, and fun package for building command line apps in Go
natchez-akka-http - A tiny integration library between Natchez and Akka Http
cli - CLI - A package for building command line app with go
scala-jsonschema - Scala JSON Schema
kingpin - CONTRIBUTIONS ONLY: A Go (golang) command line and flag parser
karma-plus-plus - http://karmaplusplus.com
kong - Kong is a command-line parser for Go
rad4s - A set of utilities to speed up rendering, storage, testing, and prototyping, especially for http4s
go-flags - go command line option parser
iron-cats-example - An example project using Iron & Cats
mitchellh/cli - A Go library for implementing command-line interfaces.