How to run bash function in Dockerfile
I have a bash function nvm defined in /root/.profile . docker build failed to find that function when I call it in RUN step.
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
Step 5 : RUN nvm install 0.12
---> Running in b639c2bf60c0
/bin/sh: nvm: command not found
I managed to call nvm by wrapping it with bash -ic , which will load /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
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 -ic wrapping? Maybe something like
RUN load_functions &&
nvm install 0.12 &&
nvm alias default 0.12 &&
nvm use 0.12
Docker's RUN doesn'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:
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 :
script.sh
#!/bin/bash
nvm install 0.12 &&
nvm alias default 0.12 &&
nvm use 0.12
and make it executable:
chmod +x script.sh
In Dockerfile put:
RUN /path/to/script.sh