如何使用内部 bash shell 为 docker exec 设置当前工作目录？
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How can I set the current working directory for docker exec with an internal bash shell?
提问by Matt
I have a developer docker image based on ubuntu:14.04 that I use to develop apps for Ubuntu 14.04. I start this image when the machine boots with docker start image-name
我有一个基于 ubuntu:14.04 的开发人员 docker 映像，我用它来为 Ubuntu 14.04 开发应用程序。当机器启动时我启动这个图像docker start image-name
My home directory was bind mounted with --volumes when initially created.
我的主目录在最初创建时绑定了 --volumes 。
To enter the image I have an alias defined in .bash_aliases
要输入图像，我定义了一个别名 .bash_aliases
alias d_enter="docker exec -ti ub1404-dev /bin/bash"
So to enter the image I just type d_enter
所以要输入图像，我只需输入 d_enter
But I often forget to run d_enter after entering a long path and would like d_enter to switch to that internal directory automatically.
但是我经常忘记在输入长路径后运行d_enter，并希望d_enter自动切换到该内部目录。
The following doesn't work.
以下不起作用。
docker exec -ti ub1404-dev /bin/bash <(echo ". ~/.bashrc && cd $(pwd)")
Is there another way I could achieve the desired result?
有没有另一种方法可以达到我想要的结果？
For example, if my current working directory is: /home/matt/dev/somepath/blabla
例如，如果我当前的工作目录是： /home/matt/dev/somepath/blabla
And I type d_enter, my current working directory currently becomes: /home/mattwhat I want to do for current directory after exec is be /home/matt/dev/somepath/blabla
然后我输入 d_enter，我当前的工作目录现在变成了：/home/matt我想在 exec 之后对当前目录做的事情是/home/matt/dev/somepath/blabla
采纳答案by Lucas Basquerotto
From API 1.35+ you can use the -w(--workdir) option:
从 API 1.35+ 开始，您可以使用-w( --workdir) 选项：
docker exec -w /my/dir container_name command
回答by Aung Kyaw Nyunt
You can achieve it with:docker exec -it containerName sh -c "cd /var/www && /bin/bash"
您可以通过以下方式实现：docker exec -it containerName sh -c "cd /var/www && /bin/bash"
回答by Peter Lyons
Definitely a hack but you could do something like making d_entera shell function (could stay an alias but this is easier to maintain):
绝对是一个 hack，但你可以做一些像制作d_entershell 函数的事情（可以保持别名，但这样更容易维护）：
d_enter() {
pwd > ~/.docker_initial_pwd
docker exec -ti ub1404-dev /bin/bash
}
And then in the container in your user account's .bashrc, add something like:
然后在您的用户帐户的容器中.bashrc，添加如下内容：
if [[ -f "${HOME}/.docker_initial_pwd ]]; then
cd $(cat "${HOME}/.docker_initial_pwd")
fi
