如何在 Dockerfile 中运行 bash 函数
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How to run bash function in Dockerfile
提问by Quanlong
I have a bash function nvmdefined in /root/.profile. docker buildfailed to find that function when I call it in RUNstep.
我在 .bashrc 中nvm定义了一个 bash 函数/root/.profile。docker build当我RUN一步一步调用它时，未能找到该函数。
RUN apt-get install -y curl build-essential libssl-dev && \
curl https://raw.githubusercontent.com/creationix/nvm/v0.16.1/install.sh | sh
RUN nvm install 0.12 && \
nvm alias default 0.12 && \
nvm use 0.12
The error is
错误是
Step 5 : RUN nvm install 0.12
---> Running in b639c2bf60c0
/bin/sh: nvm: command not found
I managed to call nvmby wrapping it with bash -ic, which will load /root/.profile.
我设法nvm通过用 包装它来调用bash -ic，这将加载/root/.profile.
RUN bash -ic "nvm install 0.12" && \
bash -ic "nvm alias default 0.12" && \
bash -ic "nvm use 0.12"
The above method works fine, but it has a warning
上述方法工作正常，但有警告
bash: cannot set terminal process group (1): Inappropriate ioctl for device
bash: no job control in this shell
And I want to know is there a easier and cleaner way to call the bash function directly as it's normal binary without the bash -icwrapping? Maybe something like
我想知道有没有一种更简单、更简洁的方法来直接调用 bash 函数，因为它是没有bash -ic包装的普通二进制文件？也许像
RUN load_functions && \
nvm install 0.12 && \
nvm alias default 0.12 && \
nvm use 0.12
采纳答案by hek2mgl
Docker's RUNdoesn't start the command in a shell. That's why shell functions and shell syntax (like cmd1&& cmd2) cannot being used out of the box. You need to call the shell explicitly:
DockerRUN不在 shell 中启动命令。这就是 shell 函数和 shell 语法（如cmd1&& cmd2）不能开箱即用的原因。您需要显式调用 shell：
RUN bash -c 'nvm install 0.12 && nvm alias default 0.12 && nvm use 0.12'
If you are afraid of that long command line, put those commands into a shell script and call the script with RUN:
如果您害怕那么长的命令行，请将这些命令放入 shell 脚本并使用以下命令调用脚本RUN：
script.sh
脚本文件
#!/bin/bash
nvm install 0.12 && \
nvm alias default 0.12 && \
nvm use 0.12
and make it executable:
并使其可执行：
chmod +x script.sh
In Dockerfile put:
在 Dockerfile 中输入：
RUN /path/to/script.sh
