uv sync --no-self

[hynek]

Since Docker is what it is and given how well caching in it works, I like to install my applications in two steps.

First, the dependencies:

COPY pyproject.toml /_lock
COPY pdm.lock /_lock

RUN --mount=type=cache,target=/root/.cache \
    set -ex \
    && cd /_lock \
    && pdm use -i /app/bin/python \
    && pdm sync --no-self --prod

Note, that the source is not copied; as long as the lock file doesn't change, this layer is cached and this is the layer that takes the longest to build.

And then the app:

COPY . /src
RUN --mount=type=cache,target=/root/.cache \
    set -ex \
    && uv pip install --python /app/bin/$PY --no-deps /src

Which is Blazing Fast™ already.

It would be great if something like this were possible with uv sync.

[mkniewallner]

I think that's the same request as #4028?

[hynek]

Aw yeah sorry, looks like I searched for the wrong terms and they know. :| Looks like it depends from what side one comes and I don't know Poetry's flags. ;)