COPY only if file exist

General Discussions
1

Hi All,

Is there a way to execute COPY only if the file exists on the host?
Maybe there is a way to do that check from a shell script that is executed in Dockerfile…

Thanks,
Alex.

1 Like
2

Hi,

COPY instruction in Dockerfile expects a file to exist in the source location mentioned. If the source file is not there the build will fail. Dockerfie doesn’t have the feature to conditionally execute instructions.

Regards

3

You can use wildcards to optionally copy. For example, to COPY a yarn.lock file that may or may not exist, do:

COPY package.json yarn.* /opt/app/
7 Likes
4

This one from @dylansmith really worked!

Thanks!