I have a python package that I want to install inside a docker file. pyproject.toml looks like: [build-system] requires = ["setuptools>=61.0"] build-backend = "setuptools.build_meta" [project] name = "bar" dependencies = [ "pandas", ] [project.optional-dependencies] foo = [ "matplotlib", ] ... and Dockerfile: # ... WORKDIR /app COPY . /app RUN pip install /app This installs the dependencies (in this example, pandas) on every build, which I want to avoid to save developer time, since pyproject.toml is rarely touched. How can I install only pandas (the dependencies listed pyproject.toml) without having to COPY . and installing bar. I want to avoid: adopt other tools like poetry create a requirements.txt and use dynamic keyword in pyproject.toml, because I have optional-dependencies and I want to keep the list of dependencies as close together (i.e. same file) as possible. Something like: # ... WORKDIR /app COPY ./pyproject.toml /app/ RUN pip install --requirements-from /app/pyproject.toml # <-- HERE COPY . /app RUN pip install /app # <-- Installs `bar` only. All dependencies already installed. Continue reading...
