Auto completion for working with Vapor, includes custom commands for generator

vapor-autocompletion.bash

# Vapor Autocomplete
_vapor_completion() {
    COMPREPLY=()

    local cur="${COMP_WORDS[COMP_CWORD]}"
    local prev="${COMP_WORDS[COMP_CWORD-1]}"

    local vaporCommands=$(vapor --help | grep 'Usage:' | sed -E 's/^[^<]*<([^>]*)>/\1/' | tr '|' '\n' 2>/dev/null)
    local genCommands="generate migration controller model resource"
    
    case "${prev}" in
        run)
            local runCommands=$(vapor run some-command-that-does-not-exist | grep 'Usage:' | sed -E 's/^[^<]*<([^>]*)>/\1/' | tr '|' '\n' 2>/dev/null)
            COMPREPLY=( $(compgen -W "${runCommands}" -- ${cur}) )
            return 0
        ;;
        *)
        ;;
    esac
    
    COMPREPLY=( $(compgen -W "${vaporCommands}" -- ${cur}) )
    COMPREPLY=( $(compgen -W "${genCommands}" -- ${cur}) )
    return 0
}
complete -F _vapor_completion vt