zsh函数在OSX上设置docker环境

Question

我试图在zsh中创建一个函数以在只有一台机器在运行的情况下为当前机器运行命令docker-machine env <machine> 。 我试图让它运行以下eval命令：

eval "$(docker-machine env default)"

要设置docker环境变量，运行docker-machine env default将输出以下内容：

export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.100:2376"
export DOCKER_CERT_PATH="/Users/chris/.docker/machine/machines/default"
export DOCKER_MACHINE_NAME="default"
# Run this command to configure your shell:
# eval "$(docker-machine env default)"

因此，要正确设置环境，您需要输入eval "$(docker-machine env default)"

我有以下功能

dmset() {
    COUNT=`docker-machine ls | grep "Running" | wc -l`
    if [[ "${COUNT// /}" == "1" ]]
    then
        RUNNING_MACHINE=`docker-machine ls | grep "Running" | awk '{print $1;}'`
        COMMAND="\"\$(docker-machine env $RUNNING_MACHINE)\""
        eval $COMMAND
        echo Setting docker environment for $RUNNING_MACHINE
    else
        echo "Unable to set Docker environment"
    fi
}

但这不起作用。 我收到以下错误消息：

(eval):1: no such file or directory: export DOCKER_TLS_VERIFY="1"\nexport DOCKER_HOST="tcp://192.168.99.100:2376"\nexport DOCKER_CERT_PATH="/Users/chris/.docker/machine/machines/default"\nexport DOCKER_MACHINE_NAME="default"\n# Run this command to configure your shell: \n# eval "$(docker-machine env default)"

如何通过单个脚本运行eval命令设置环境？

Answer 1

按照@Etan Reisner的评论，我将其更改为：

dmset() {
    COUNT=`docker-machine ls | grep "Running" | wc -l`
    if [[ "${COUNT// /}" == "1" ]]
    then
        RUNNING_MACHINE=`docker-machine ls | grep "Running" | awk '{print $1;}'`
        while IFS= read -r line
        do
            if [[ $line == 'export'* ]]
            then
                eval $line
            fi
        done < <(docker-machine env $RUNNING_MACHINE)
        echo "Docker environment set for $RUNNING_MACHINE"
    else
        echo "Unable to set Docker environment"
    fi
}