Hello - I am interested in dynamically creating docker tags. I can generate them using git commands .. something like

"$(git log -1 --date=unix --format=%cd)-$(git rev-parse --short HEAD)"

. I see there is a note about this requiring custom plugin implementation (https://www.pantsbuild.org/docs/tagging-docker-images#tagging-images). Is there any existing examples or other places I should look before attempting to implement something? Thanks!

@curved-television-6568 you're the expert here... 🙂

Sorry should have done a better search before asking 🙂 I will catch up on this thread too. https://pantsbuild.slack.com/archives/C046T6T9U/p1637936640282100

Great. Should lift the gist of that thread to the docs before it is lost in space :)

I've been doing this by adding the following to my `pants.toml`:

[docker]
build_args = [
    # To set when packaging:
    #   COMMIT_SHA="$(git rev-parse --short HEAD)"
    #   export PANTS_DOCKER_BUILD_ARGS="['COMMIT_SHA=$COMMIT_SHA']"
    "COMMIT_SHA=SETME"
]

macros.py

(or individually for each

docker_image

target):

def tagged_docker_image(**kwargs):
   ...
   kwargs["image_tags"] = [
        # Pant"s doesn't expose the commit sha and we need to set PANTS_DOCKER_BUILD_ARGS="['COMMIT_SHA=$(git rev-parse --short HEAD)']" when this is packaged.
        # <https://github.com/pantsbuild/pants/issues/13724>
        "{build_args.COMMIT_SHA}",
    ]
    docker_image(**kwargs)

And then in when packaging (in a GHA for us):

COMMIT_SHA="$(git rev-parse --short HEAD)"
export PANTS_DOCKER_BUILD_ARGS="['COMMIT_SHA=$COMMIT_SHA']"

...
./pants package $target

Cool, similarly I am using

DOCKER_TAG=$(./build-support/docker-tag.sh) ./pants publish docker/geminus-ui