decline vs zio-cli

decline

A composable command-line parser for Scala. (by bkirwi)

Parsing

Source Code

monovore.com

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zio-cli

Rapidly build powerful command-line applications powered by ZIO (by zio)

Zio CLI Command-line Scala

Source Code

zio.dev

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decline		zio-cli
	Project
2	Mentions	2
633	Stars	126
-	Growth	0.0%
1.9	Activity	7.7
30 days ago	Latest Commit	6 days ago
Scala	Language	Scala
Apache License 2.0	License	Apache License 2.0

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.

decline

Posts with mentions or reviews of decline. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-02-20.

Recommended CLI parsing libraries
5 projects | /r/scala | 20 Feb 2021

That issue is not about sum types, it's about products of subcommand decoders. E.g. you might want to support a syntax like this:
Got A Quick Question Ask Here December 28 2020
1 project | /r/scala | 25 Jan 2021

decline and nothing else comes close. It's great.

zio-cli

Posts with mentions or reviews of zio-cli. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-03-02.

Creating a bash completion script (2018)
6 projects | news.ycombinator.com | 2 Mar 2022

>It would almost be easier to modify the bash source itself to read and use a regular grammar
It's an interesting idea that we're using for zio-cli [1].
[1] https://github.com/zio/zio-cli/pull/119
Recommended CLI parsing libraries
5 projects | /r/scala | 20 Feb 2021

I know this is at very early stage, no docs, not recommended for prod use but you may want to add zio-cli into your watch list.

What are some alternatives?

When comparing decline and zio-cli you can also consider the following projects:

Scopt - command line options parsing for Scala

Scallop - a simple Scala CLI parsing library

picocli - Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.

Scala Parser Combinators - simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module

case-app - Type-level & seamless command-line argument parsing for Scala

Fast Parse - Writing Fast Parsers Fast in Scala

Git - Git Source Code Mirror - This is a publish-only repository but pull requests can be turned into patches to the mailing list via GitGitGadget (https://gitgitgadget.github.io/). Please follow Documentation/SubmittingPatches procedure for any of your improvements.

atto - friendly little parsers

cleo - Cleo allows you to create beautiful and testable command-line interfaces.

Parboiled2 - A macro-based PEG parser generator for Scala 2.10+

autocomplete - IDE-style autocomplete for your existing terminal & shell