When a project is specified only via pyproject.toml
(i.e. no setup.{py,cfg}
files), how can it be installed in editable mode via pip
(i.e. python -m pip install -e .
)?
I tried both setuptools
and poetry
for the build system, but neither worked:
[build-system]
requires = ["setuptools", "wheel"]
build-backend = "setuptools.build_meta"
[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"
I get the same error for both build systems:
ERROR: Project file:///tmp/demo has a 'pyproject.toml' and its build backend is missing the 'build_editable' hook. Since it does not have a 'setup.py' nor a 'setup.cfg', it cannot be installed in editable mode. Consider using a build backend that supports PEP 660.
I'm using this inside a conda
environment, the following is my version of setuptools
and pip
:
$ conda list | grep setuptools
setuptools 58.3.0 pypi_0 pypi
$ python -m pip --version
pip 21.3.1
PEP 660 – Editable installs for pyproject.toml based builds defines how to build projects that only use pyproject.toml
. Build tools must implement PEP 660 for editable installs to work. You need a front-end (such as pip ≥ 21.3) and a backend. The statuses of some popular backends are:
Note: To be able to do an editable installation to your user site (pip install -e --user
), you need a system installed setuptools
v62.0.0 or newer.