Build wheel in Polylithic project structure - include src folder

[mstumberger]

Problem description

I have a following project structure:

I have source files in src folder, and pyproject.toml of a package I want to build.

root pyproject.toml

### Main SDK: izoelektro-sdk

[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"

[bdist_wheel]
universal = 1

[project]
name = "izoelektro-sdk"
version = "v1.2.4"
description = "Izoelektro SDK for various automation and IoT integrations."
authors = [{ name = "...", email = "...@...i" }]
license = "MIT"
readme = "Readme.md"

[project.optional-dependencies]
ble = [
    "izoelektro-ble-sdk"
]
slack = [
    "izoelektro-slack"
]
ram_center = [
    "izoelektro-ram-center"
]
all = [
    "izoelektro-ram-center", "izoelektro-slack", ...
]

packages/connection_ble includes:

[project]
name = "izoelektro-ble-sdk"
version = "v1.2.4"
description = "RAM Center module for Izoelektro SDK"
authors = [{ name = "...", email = "...@...i" }]
dependencies = [
    "bleak",
    "nest_asyncio",
]

[build-system]
requires = ["setuptools", "wheel"]
build-backend = "setuptools.build_meta"

I specify which packages to include in setup.py file.

from setuptools import setup

setup(
    name="izoelektro-ble-sdk",
    package_dir={"": "../../src"},
    url='https://gitlab.com/SDK',
    packages=[
        'izoelektro',
        'izoelektro.connection',
        'izoelektro.connection.ble',
        'izoelektro.connection.ble.ble_adv_scan',
        'izoelektro.device',
    ],
    description="BLE Izoelektro SDK",
    author="Marko",
)

When I install the package with pip install -e . install passes but when I want to build a wheel from project root with python -m build packages/connection_ble/ I get an error:

...
copying ..\..\src\izoelektro_ble_sdk.egg-info\requires.txt -> izoelektro_ble_sdk-1.2.4\..\..\src\izoelektro_ble_sdk.egg-info
copying ..\..\src\izoelektro_ble_sdk.egg-info\top_level.txt -> izoelektro_ble_sdk-1.2.4\..\..\src\izoelektro_ble_sdk.egg-info
copying ..\..\src\izoelektro_ble_sdk.egg-info\SOURCES.txt -> izoelektro_ble_sdk-1.2.4\..\..\src\izoelektro_ble_sdk.egg-info
Writing izoelektro_ble_sdk-1.2.4\setup.cfg
Creating tar archive
removing 'izoelektro_ble_sdk-1.2.4' (and everything under it)
* Building wheel from sdist
* Creating isolated environment: venv+pip...
* Installing packages in isolated environment:
  - setuptools
* Getting build dependencies for wheel...
running egg_info
error: error in 'egg_base' option: '../../src' does not exist or is not a directory

ERROR Backend subprocess exited when trying to invoke get_requires_for_build_wheel

As far as I figured out files are copied to the temp folder when building wheel and the files don't exist there.

How can I include src folder?

I saw it can be done with poetry with something like this in pyproject.toml:

[tool.poetry]
name = "izoelektro-ble-sdk"
version = "1.2.4"
description = "BLE Izoelektro SDK"
authors = [{ name = "...", email = "...@...i" }]
license = "MIT"
readme = "Readme.md"

packages = [
    { include = "izoelektro", from = "../../src" },
    { include = "izoelektro/connection", from = "../../src" },
    { include = "izoelektro/connection/ble", from = "../../src" },
    { include = "izoelektro/connection/ble/adv_scan", from = "../../src" },
    { include = "izoelektro/device", from = "../../src" }
]

but It's overkill for my use.