completion-jruby

#! bash
# bash completion for the `jruby` command.
#
# Copyright (c) 2009-2021 Daniel Luz <dev dot gsz at mernen dot com>.
# Distributed under the MIT license.
# https://mernen.com/projects/completion-ruby
#
# To use, source this file on bash:
#   . completion-jruby
#
# This script works best when completion-ruby is also loaded.

__jruby() {
    local cmd=$1
    local cur=$2
    local prev=$3
    COMPREPLY=()

    local options="
        -G -J --jdb --environment --properties --sample --client --server --manager
        --disable --enable
        --headless --bytecode -X-O -X+O -X-C -X+C --fast --dev
        --profile --profile.api --profile.flat --profile.graph --profile.html --profile.json --profile.out --profile.service"

    local i
    local script_given
    local script_in_path
    local switches_accepted=1
    for ((i=1; i < $COMP_CWORD; ++i)); do
        local arg=${COMP_WORDS[$i]}

        case $arg in
        -S)
            script_in_path=1;;
        -S*)
            # Syntax supported by jruby, but not by ruby, oddly
            script_given=1;;
        --)
            # End of switches
            switches_accepted=
            [[ $COMP_CWORD != $((i + 1)) ]] && script_given=1
            break;;
        -*)
            ;;
        *)
            # Non-switch arg, must be the script name
            script_given=1
            switches_accepted=;;
        esac
    done

    if [[ $switches_accepted && $cur = -* ]]; then
        COMPREPLY=($(compgen -W "$options" -- "$cur"))
    elif [[ $script_in_path && ! $script_given ]]; then
        local jruby_dir=$(dirname "$(which "$cmd")" 2>/dev/null)
        if [[ -d $jruby_dir ]]; then
            local jruby_cmds=($(find "$jruby_dir" -maxdepth 1 -type f -perm +111 2>/dev/null))
            jruby_cmds=("${jruby_cmds[@]##*/}")
            COMPREPLY=($(compgen -W "${jruby_cmds[*]}" -- "$cur"))
        fi
    elif [[ $prev = --enable || $prev = --disable ]]; then
        COMPREPLY=($(compgen -W "gems did_you_mean rubyopt frozen-string-literal" -- "$cur"))
    fi

    # Include `ruby` completion results, if available
    if [[ $(type -t __ruby) = function ]]; then
        local cr=("${COMPREPLY[@]}")
        __ruby "$@"
        COMPREPLY+=("${cr[@]}")
    fi
}

complete -F __jruby -o filenames -o bashdefault -o default jruby
# vim: ai ft=sh sw=4 sts=4 et