mamba-ssm的安装报错解决

在配置SCSegamba的环境时出现报错，很多用了mamba的模型如果也报了错，应该都可以用这个方法来解决。

conda create -n SCSegamba python=3.10 -y
conda activate SCSegamba
pip install torch==1.13.1+cu116 torchvision==0.14.1+cu116 -f https://download.pytorch.org/whl/torch_stable.html
pip install -U openmim
mim install mmcv-full
pip install mamba-ssm==1.2.0
pip install timm lmdb mmengine numpy

执行到安装mamba-ssm时，首先报了下面这种错，报错上说No module named 'torch'，可是我之前明明已经装好了torch。

Looking in indexes: https://mirrors.aliyun.com/pypi/simple
Collecting mamba-ssm==1.2.0
  Downloading https://mirrors.aliyun.com/pypi/packages/b5/65/f648f2ac2e783858810f802856037e9600425673a48326273c68631b9b4c/mamba_ssm-1.2.0.tar.gz (34 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [19 lines of output]
      /tmp/pip-build-env-d0i5jc3p/overlay/lib/python3.10/site-packages/setuptools/_vendor/wheel/bdist_wheel.py:4: FutureWarning: The 'wheel' package is no longer the canonical location of the 'bdist_wheel' command, and will be removed in a future release. Please update to setuptools v70.1 or later which contains an integrated version of this command.
        warn(
      Traceback (most recent call last):
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-d0i5jc3p/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 333, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
        File "/tmp/pip-build-env-d0i5jc3p/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-d0i5jc3p/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 520, in run_setup
          super().run_setup(setup_script=setup_script)
        File "/tmp/pip-build-env-d0i5jc3p/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
        File "<string>", line 19, in <module>
      ModuleNotFoundError: No module named 'torch'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'mamba-ssm' when getting requirements to build wheel

经过调查发现，其实这里有一个很奇怪的机制，pip 构建 mamba-ssm 时会临时起一个 /tmp/pip-build-env-... 的干净环境去跑 setup.py/pyproject，那个临时环境里没有 torch，所以炸了。
目前还不明白是哪里导致发生这么奇怪的机制的。
在安装时关闭 build isolation，执行下面的命令，就可以正常安装了。

pip install mamba-ssm==1.2.0 --no-build-isolation

另外安装mamba-ssm时有可能还会报下面这样的奇怪的错，这个错又说No module named 'pkg_resources'，更新了setuptools后重新安装也不起作用，最后发现是需要重新安装指定setuptools的版本后，才能解决报错，很怪。。。。
我指定的版本是setuptools==79.0.1

Looking in indexes: https://mirrors.aliyun.com/pypi/simple
Collecting mamba-ssm==1.2.0
  Using cached https://mirrors.aliyun.com/pypi/packages/b5/65/f648f2ac2e783858810f802856037e9600425673a48326273c68631b9b4c/mamba_ssm-1.2.0.tar.gz (34 kB)
  Preparing metadata (pyproject.toml) ... error
  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [19 lines of output]
      /hy-tmp/SCSegamba/lib/python3.10/site-packages/wheel/bdist_wheel.py:4: FutureWarning: The 'wheel' package is no longer the canonical location of the 'bdist_wheel' command, and will be removed in a future release. Please update to setuptools v70.1 or later which contains an integrated version of this command.
        warn(
      Traceback (most recent call last):
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 175, in prepare_metadata_for_build_wheel
          return hook(metadata_directory, config_settings)
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/setuptools/build_meta.py", line 380, in prepare_metadata_for_build_wheel
          self.run_setup()
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/setuptools/build_meta.py", line 520, in run_setup
          super().run_setup(setup_script=setup_script)
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
        File "<string>", line 20, in <module>
        File "/hy-tmp/SCSegamba/lib/python3.10/site-packages/torch/utils/cpp_extension.py", line 25, in <module>
          from pkg_resources import packaging  # type: ignore[attr-defined]
      ModuleNotFoundError: No module named 'pkg_resources'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> mamba-ssm

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.