adaszko/complgen: Generate {bash,fish,zsh} completions from a single EBNF-like grammar

• complgen

  5 190 9.4 Rust

  Generate bash/fish/zsh completions from a single declarative grammar familiar from man pages

The advantage complgen has over clap_complete (currently) is that it can generate completions based on an external command output. For example for cargo, you can have this (incomplete yet) grammar that not only completes +toolchains in cargo but also suggest test names in cargo test .

• emuriscv

  2 - -

See here for an example.

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• intellicomp

  1 3 5.6 Rust

  YAML-based specifications for providing cross-shell command completions

Interesting - I started working on something very similar a few months back: https://github.com/dob9601/intellicomp/tree/master

• docopt

  29 7,891 0.0 Python

  This project is no longer maintained. Please see https://github.com/jazzband/docopt-ng

  

As for the implementation differences, complgen uses a trivial DSL that’s everybody is already familiar with more or less because it’s a slightly more rigorous version of what tools usually spit out when you do command --help (projects like docopt even use that for command line arguments parsing). Those happen to be regular languages and therefore can be represented as a Deterministic Finite Automata. complgen compiles the grammars to DFAs, minimizes the DFA and spits out shell-specific shell completions scripts that simply walk the DFA to match and complete the current input.

Suggest a related project