dockerdockerfile

Docker command/option to display or list the build context

Is there a command/option to display or list the context which is sent to the Docker daemon for building an image?

$ docker build -t "image-name"
Sending build context to Docker daemon 8.499 MB
...

Files and directories can be excluded from the build context by specifying patterns in a .dockerignore file. I guess what I'm looking for amounts to testing the .dockerignore in addition to any other niche rules Docker uses when determined the context.

Solution

  • The only way would be to add the current directory to an specific directory and list it.

    Try building with this Dockerfile:

    FROM busybox

RUN mkdir /tmp/build/
# Add context to /tmp/build/
COPY . /tmp/build/

    Build it with:

    docker build -t test .

    List all the files and directories in /tmp/build:

    docker run --rm -it test find /tmp/build