How to share the dependency layer between version updates

[Nugine]

The dependency layer will be invalidated when pyproject.toml changes. But the dependencies usually remain unchanged when a project bumps version. How to share the dependency layer between version updates?

https://docs.docker.com/build/cache/invalidation/#general-rules

uv-docker-example/Dockerfile

Lines 13 to 17 in 6473a50

	# Install the project's dependencies using the lockfile and settings
	RUN --mount=type=cache,target=/root/.cache/uv \
	--mount=type=bind,source=uv.lock,target=uv.lock \
	--mount=type=bind,source=pyproject.toml,target=pyproject.toml \
	uv sync --locked --no-install-project --no-dev

[foarsitter]

Hatch can do this for you.

[project]
name = "project"
dynamic = [ "version" ]

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

[tool.hatch.version]
path = "src/project/_version.py"