Running complex shell script in Dockerfile

Question

I am running windows binaries in a linux container using wine. For convenience, I create runnable shortcuts that invoke wine behind the scenes so my python code invoking these CLI tools works fine in Windows and Linux.

This is how my shortcut generation looks like:

for exe in /opt/tools/bin/*.exe; do
  tool="${exe##*/}"
  tool="${tool%.exe}"
  cat <<EOF > /opt/app/bin/${tool}
#!/bin/bash
wine /opt/tools/bin/${tool}.exe "\${@}"
EOF
  chmod 755 /opt/app/bin/${tool}
done

I tried to run this in a RUN command straight in the Dockerfile but that failed with some cryptic error, so I ended up just storing the script in a file that I copy into the image and then run.

COPY ./docker/shortcut_generator.sh ./
RUN ./shortcut_generator.sh

In a way, I have solved the issue, but I can't help but wonder if someone more knowledgeable on Dockerfile syntax than me could inline that snippet in the Dockerfile.

Does [this](https://stackoverflow.com/questions/33439230/how-to-write-commands-with-multiple-lines-in-dockerfile-while-preserving-the-new) answers your question? — Ivan, Oct 10 '22 at 18:17
Doing it in script is much more readable. Any pariticular reason to inline it ? — Philippe, Oct 10 '22 at 18:52
@Philippe none other than the fact that I don't use this script anywhere else — Fabio Picchi, Oct 11 '22 at 13:11
Thanks for the tip @Ivan! I'll try to adapt it to my use case — Fabio Picchi, Oct 11 '22 at 13:12
Even though you don't use this script anywhere else, it's still a cleaner solution. — Philippe, Oct 11 '22 at 18:56

Running complex shell script in Dockerfile

0 Answers0