Torch requirement makes installing mmdet impossible ias part of a package #238
Description
Hi all, I've recently installed mmdet in a project I'm working on.
This project needds to be packed up as a package so it can be used in other projects.
The problem is, in order to make it into a package, you have to provide a build script (I am doing mine with Poetry, but this idea would be true regardless of which approach to making a package I might be using). The problem there is that the installation instructions for mmdet require using openmim, but openmim requires torch, which is not available in most default environements from which the package will be installed. This leads to a failure when building the environement with the classic ModuleNotFoundError: No module named 'torch'.
To clarify, torch is a requirement of the package of course, and it will be installed as part of the installation of the package, but it cannot be installed BEFORE the package, since requirements needs to be resolved with other requirements.
Here's the full output:
poetry install
Warning: Found deprecated priority 'secondary' for source 'private' in pyproject.toml. Consider changing the priority to one of the non-deprecated values: 'default', 'primary', 'supplemental', 'explicit'.
Installing dependencies from lock file
No dependencies to install or update
Preparing build environment with build-system requirements poetry-core>=1.0.0, openmim>=0.1.1
Traceback (most recent call last):
File "/local-scratch2/aharell/CFM-Task-Models/src/split_utils/miminstaller.py", line 9, in <module>
install_mmdet()
File "/local-scratch2/aharell/CFM-Task-Models/src/split_utils/miminstaller.py", line 4, in install_mmdet
install('mmengine')
File "/tmp/tmpu0ao7bdo/.venv/lib/python3.9/site-packages/mim/commands/install.py", line 128, in install
install_args += ['-f', get_mmcv_full_find_link(mmcv_base_url)]
File "/tmp/tmpu0ao7bdo/.venv/lib/python3.9/site-packages/mim/commands/install.py", line 165, in get_mmcv_full_find_link
torch_v, cuda_v = get_torch_cuda_version()
File "/tmp/tmpu0ao7bdo/.venv/lib/python3.9/site-packages/mim/utils/utils.py", line 340, in get_torch_cuda_version
raise err
File "/tmp/tmpu0ao7bdo/.venv/lib/python3.9/site-packages/mim/utils/utils.py", line 338, in get_torch_cuda_version
import torch
ModuleNotFoundError: No module named 'torch'
In short, I think that there is an urgent need to either remove torch as a requirement for openmim or to provide instructions on how to install mmdet (and other similar packages like mmseg etc.) without relying on openmim