Monorepo support

Hello,

I appreciate the introduction of hatch and what it offers. But of course we are all looking for a build-tool which can do everything. So I ask, since it is very common with microservice based architectures, is the usage of Monrepos somehow a concern in the design of hatch?

I mean instead of a structure like this:

package
├── module
├── tests
└── pyproject.toml

having something like this:

package_a
├── module
├── tests
└── pyproject.toml
package_b
├── module
├── tests
└── pyproject.toml

with the requirement of

• having also shared project dependecies, i.e. pytest and similar which are shared among all sub projects and are automatically installed in to each projects dev dependencies
• quickly switching projects (i.e. virtual environments)?
• executing tests automatically in each separate virtual environment?

[aka-raccoon]

Hi I was looking for a way how to manage a monorepo with multiple AWS lambdas and how to combine that with Python best practices. My requirements were:

• usage of src/ folder
• only one pyproject for the whole repo
• ability to build lambdas with separated requirements for each

Thanks to great modularity of Hatch I was able to come up with custom builder called hatch-aws. You can use it to build AWS lambdas. I plan to add publish option in future.

Hopes somebody else finds it useful too.

[adriangb]

I also am interested in this. More precisely, I’m looking for something like Cargo workspaces that let me:

1. Have a single top level lockfile.
2. Establish interdependencies between libraries/apps and let me install/build a single app/library (e.g. install a single micro service and all of its dependencies in a container image).
3. Can run tests on all packages (cargo test) or a single package (cargo test -p add_one). This is more of a nice to have since (ideally) you can always pushd add_one; pytest; popd.

I realize this may technically be possible with Hatch (based on https://github.com/pypa/hatch/issues/233#issuecomment-1123820713) but it seems like custom stuff and a good chunk of knowledge is required to make it work. It would be really nice to see a self contained writeup or plugin.