ssm script with fzf

ssm_fzf.sh

#!/bin/bash
set -e

usage() {
    echo "USAGE: `basename $0` [Options]"
    echo "  ssm target selection using fzf"
    echo ""
    echo "Optinal Arguments:"
    echo "  All arguments excluded options pass to initial queries of fzf"
    echo ""
    echo "Options:"
    echo "  -h, --help          show this help."
    echo "  -p, --profile       select aws profile.(default: 'default')"
    echo "  -v, --verbose       show detail commands."
    echo "  --dry               dry run mode."
    echo ""
    echo "Dependent packages:"
    echo "  aws-cli, ssm-plugin, fzf"
    exit 1;
}

main() {
    declare -a argv=()
    while (( $# > 0 )); do
        case $1 in
            -h|--help) usage ;;
            -p|--profile) readonly profile=$2; shift ;;
            -v|--verbose) readonly is_verbose=1 ;;
            --dry) readonly is_dry=1 ;;
            -*) fatal "Unkown option: $1"; usage ;;
            *) argv=("${argv[@]}" "$1") ;;
        esac
        shift
    done
    set -- "${argv[@]}"

    local query="$*"

    local params=""
    if [ "$profile" != "" ];then
        params="$params --profile $profile"
    fi

    local instance=$(aws ec2 describe-instances --query 'sort_by(Reservations[].Instances[].{Id:InstanceId,Name:Tags[?Key==`Name`].Value|[0]},&Name)' --output text $params | fzf --prompt="ssm profile:${profile:-default}>" --query="$query")

    if [ "$instance" == "" ]; then
        echo "Instance is not choosed."
        exit 1
    fi

    local instance_id=$(echo "$instance" | cut -f 1)

    run aws ssm "$params" start-session --target "$instance_id"
}

run() {
    if [ $is_dry ]; then
        echo "[dry run] $@"
    else
        if [ $is_verbose ];then
            echo "[run] $@"
        fi
        eval "$@"
    fi
}

# call main.
main "$@"