docker COPY with file globbing
For any non-standard build operation, I prefer wrapping the docker build command in a script (named 'build').
Here I would
- create a subfolder
tmp(just beside theDockerfile, in order to keep it in thedocker buildcontext) - make the shell
cpwith globing:cp ./src/**/project.json tmp - call
docker build, with aDockerfileincludingCOPY tmp/ /app/ - deleting
tmp.
That way, I pre-configure what I need from host, before building the image from the host context.
Little late, but with multistage building, you can get this behavior. Here I do it for a large maven build
FROM maven:3.6-slim as stagingWORKDIR /src/COPY . .RUN mkdir /poms/ \ && find ./ -type d -exec mkdir -p '/poms/{}' \; \ && find ./ -name pom.xml -exec cp -r '{}' '/poms/{}' \;FROM maven:3.6-slim as builderWORKDIR /src/COPY --from=staging /poms/* ./RUN mvn dependency:go-offlineA bit of a hack, but given that it's a multistage, the first stage just get's thrown away and the copy is a cheap operation