dockerfile, output evaluated commands

Question

Is there anyway to have docker create output the evaluated line?

for example

# Dockerfile
COPY ${SRC}/file .

will echo Step 1/1 COPY ${SRC}/file .

I want it to output instead Step 1/1 COPY src/file .

Edit: I'm open to other packers that are somewhat compatible with Docker files, such as buildah bud

rhatdan · Accepted Answer · 2022-04-22 15:50:06Z

1

Open an issue with Buildah, and I think this would be a reasonable change.

answered Apr 22, 2022 at 15:50

rhatdan

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Comments

Krushnal Patel · Accepted Answer · 2022-04-20 13:35:39Z

0

You could try listing the contents of the directory by using ls in the next step.

answered Apr 20, 2022 at 13:35

Krushnal Patel

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that only solves the example. it might be something like RUN java ${JAVA_OPTS} -jar app.jar for example.