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COPY only if file exist


(Shurikag) #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…


(Ranjandas) #2


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.


(Dylan Smith) #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/