shell completion

[Freed-Wu]

Describe the solution you'd like

A shell completion for common shells (bash, zsh, ...)

Like this:

#compdef cling

local options=(
  --errorout"[Do not recover from input errors]"
  -help"[Print this help text]"
  -L"[Add directory to library search path]:directory:_dirs"
  -l"[Load a library before prompt]:library:_files"
  --metastr"[Set the meta command tag, default '.']:value"
  --nologo"[Do not show startup-banner]"
  -noruntime"[Disable runtime support (no null checking, no value printing)]"
  -version"[Print the compiler version]"
  -v"[Enable verbose output]"
)
_arguments -s $options '*::{service=clang _gcc}'

Describe alternatives you've considered

Like https://github.com/TeX-Live/texdoc/blob/master/script/texdoclib-const.tlu#L53-L75, provide a template, then generate this file from a data struct https://github.com/TeX-Live/texdoc/blob/master/script/texdoclib-const.tlu#L77-L260.