Bash completion for Serverless

serverless

_sls()
{
    local cur prev words cword
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    words="${COMP_WORDS}"

    local COMMANDS=(
        "project"
        "function"
        "endpoint"
        "event"
        "dash"
        "stage"
        "region"
        "resources"
        "plugin"
        "variables"
    )

    local FCOMMANDS=(
        "run"
        "deploy"
        "create"
        "logs"
        "remove"
        "rollback"
        )

    local command
    if [[ ${COMP_CWORD} -gt 1 && ${COMMANDS[@]} =~ ${COMP_WORDS[1]} ]]; then
        command=${COMP_WORDS[1]}
    fi

    # command is function, showing subcommands
    if [[ "$command" = "function" && ${COMP_CWORD} -eq 2 ]]; then
        COMPREPLY=( $( compgen -W '${FCOMMANDS[@]}' ${cur} ) )
        return 0
    fi

    # command is function and has subcommand, showing function names
    if [[ "$command" = "function" && ${COMP_CWORD} -eq 3 ]]; then
        local fnames=`find . -type f -name "s-function.json" |sed "s#\(.*\)/.*#\1#" | rev |cut -d"/" -f1 | rev`
        COMPREPLY=( $( compgen -W '${fnames}' ${cur} ) )
        return 0
    fi

    # no command yet, show what commands we have
    if [ "$command" = "" ]; then
        COMPREPLY=( $( compgen -W '${COMMANDS[@]}' ${cur} ) )
    fi

    return 0
} &&

complete -F _sls serverless
complete -F _sls sls