optparse-applicative

Tech stack & purpose

optparse-applicative is a Haskell library for parsing command-line options and arguments. It provides an applicative interface for composing option parsers, handling argument validation, generating usage documentation and help screens, and enabling bash, zsh, and fish shell completions. The library is built around a `Parser` type that implements `Functor`, `Applicative`, and `Alternative` instances, allowing developers to construct complex command-line interfaces by combining simpler parsers using standard functional programming patterns.

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Contributors (top 30 of 63)

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  Paolo Capriotti412 commits · 179 followers
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  Huw Campbell352 commits · 123 followers
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  Tommy Bidne10 commits · 7 followers
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  Oleg Grenrus8 commits · 602 followers
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  thielema6 commits · 7 followers
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  Simon Jakobi5 commits · 117 followers
• Ben Gamari4 commits
• Lennart Augustsson4 commits
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  Herbert Valerio Riedel3 commits · 287 followers
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  Bryan O'Sullivan2 commits · 1,855 followers
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  Dag2 commits · 114 followers
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  Tim McGilchrist2 commits · 232 followers
• flip1112 commits
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  George Wilson2 commits · 179 followers
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  ˌbodʲɪˈɡrʲim2 commits · 227 followers
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  Andreas Abel2 commits · 303 followers
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  Sibi Prabakaran1 commits · 227 followers
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  Josef Svenningsson1 commits · 67 followers
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  Kevin Quick1 commits · 60 followers
• Tom Ellis1 commits
• Adam Sapek1 commits
• Lyndon Maydwell1 commits
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  Niklas Hambüchen1 commits · 453 followers
• Michael Schneider1 commits
• Fujimura Daisuke1 commits
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  Chris Martin1 commits · 282 followers
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  Adam Bergmark1 commits · 151 followers