No pre-compiled wheels for Windows

Currently https://pypi.org/project/cutadapt/#files has Linux wheels for Python 3.6, 3.7, 3.8, 3.9 and 3.10 - plus a .tar.gz archive of the source code. This means pip install cutadapt on Windows attempts to compile things:

$ pip install cutadapt
Collecting cutadapt
  Using cached cutadapt-3.5.tar.gz (303 kB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'done'
Collecting dnaio~=0.5
  Using cached dnaio-0.6.0.tar.gz (131 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Collecting xopen~=1.1
  Using cached xopen-1.2.1-py3-none-any.whl (12 kB)
Collecting isal>=0.9.0
  Using cached isal-0.11.1-cp310-cp310-win_amd64.whl (274 kB)
Using legacy 'setup.py install' for dnaio, since package 'wheel' is not installed.
Building wheels for collected packages: cutadapt
  Building wheel for cutadapt (pyproject.toml): started
  Building wheel for cutadapt (pyproject.toml): finished with status 'error'
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\xxx\AppData\Local\Microsoft\WindowsApps\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\python.exe' 'C:\Users\xxx\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pip\_vendor\pep517\in_process\_in_process.py' build_wheel 'C:\Users\xxx\AppData\Local\Temp\tmp0a8lowdp'
       cwd: C:\Users\xxx\AppData\Local\Temp\pip-install-n29oeudt\cutadapt_10e512be8b9643199f3079ff9d38e975
  Complete output (24 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-3.10
  creating build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\adapters.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\align.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\filters.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\json.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\log.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\modifiers.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\parser.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\pipeline.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\report.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\statistics.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\steps.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\tokenizer.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\utils.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\_version.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\__init__.py -> build\lib.win-amd64-3.10\cutadapt
  copying src\cutadapt\__main__.py -> build\lib.win-amd64-3.10\cutadapt
  running build_ext
  error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
  ----------------------------------------
  ERROR: Failed building wheel for cutadapt
Failed to build cutadapt
ERROR: Could not build wheels for cutadapt, which is required to install pyproject.toml-based projects

https://cutadapt.readthedocs.io/en/stable/installation.html#installation-on-windows highlights that the GitHub releases page often has a .exe file for Windows. Would it be easy for you to make a Windows wheel as well / instead of the EXE?

[marcelm]

Sadly I’m not able to install MSVC on the machine in question

Thanks. I’ll need to make Windows wheels for dnaio as well.

That can give an error due to the xopen, dnaio and python-isal dependencies

Good point, I forgot (and just copied what TestPyPI writes on top of the page.)

[marcelm]

Oh great, thanks for testing it! Some of the changes benefitted all platforms, so it was good to do this even for users not on Windows.