find a workaround if stow not installed, TBD

[renaud]

I got this error when installing

uv run install.py
Using CPython 3.12.9 interpreter at: /Users/ren/miniconda3/bin/python3
Creating virtual environment at: .venv
Installed 21 packages in 69ms
Setting up config...
  Created config directory: /Users/ren/.config/opencode
  No existing config found, starting fresh
  Saved config to: /Users/ren/.config/opencode/opencode.json

Installing files...
Traceback (most recent call last):
  File "/Users/ren/switchdrive/backup/dev/_HEVS/opengrader/install.py", line 106, in <module>
    main()
  File "/Users/ren/switchdrive/backup/dev/_HEVS/opengrader/install.py", line 102, in main
    install_stow()
  File "/Users/ren/switchdrive/backup/dev/_HEVS/opengrader/install.py", line 66, in install_stow
    subprocess.run(
  File "/Users/ren/miniconda3/lib/python3.12/subprocess.py", line 550, in run
    with Popen(*popenargs, **kwargs) as process:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ren/miniconda3/lib/python3.12/subprocess.py", line 1028, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/Users/ren/miniconda3/lib/python3.12/subprocess.py", line 1963, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'stow'

one workaround is to not use stow, but pure python.

alternatively, we could copy the skills instead of symlink...

[renaud]

If i install stow (brew install stow), install fails with

opengrader ֎ uv run install.py
Setting up config...
  Created config directory: /Users/ren/.config/opencode
  Loaded existing config: /Users/ren/.config/opencode/opencode.json
  Saved config to: /Users/ren/.config/opencode/opencode.json

Installing files...
WARNING! stowing skills would cause conflicts:
  * existing target is not owned by stow: .DS_Store
  * existing target is not owned by stow: exam-markdown-to-yaml/SKILL.md
  * existing target is not owned by stow: export-exam-to-pdf/SKILL.md
  * existing target is not owned by stow: export-exam-to-pdf/scripts/generate_pdfs.py
  * existing target is not owned by stow: import-student-answers/SKILL.md
  * existing target is not owned by stow: import-student-answers/scripts/import_students_response.py
  * existing target is not owned by stow: import-unit-tests/SKILL.md
  * existing target is not owned by stow: moodle-to-yaml/SKILL.md
  * existing target is not owned by stow: pregrade/SKILL.md
  * existing target is not owned by stow: skill-creator/LICENSE.txt
  * existing target is not owned by stow: skill-creator/SKILL.md
  * existing target is not owned by stow: skill-creator/agents/analyzer.md
  * existing target is not owned by stow: skill-creator/agents/comparator.md
  * existing target is not owned by stow: skill-creator/agents/grader.md
  * existing target is not owned by stow: skill-creator/assets/eval_review.html
  * existing target is not owned by stow: skill-creator/eval-viewer/generate_review.py
  * existing target is not owned by stow: skill-creator/eval-viewer/viewer.html
  * existing target is not owned by stow: skill-creator/references/schemas.md
  * existing target is not owned by stow: skill-creator/scripts/__init__.py
  * existing target is not owned by stow: skill-creator/scripts/aggregate_benchmark.py
  * existing target is not owned by stow: skill-creator/scripts/generate_report.py
  * existing target is not owned by stow: skill-creator/scripts/improve_description.py
  * existing target is not owned by stow: skill-creator/scripts/package_skill.py
  * existing target is not owned by stow: skill-creator/scripts/quick_validate.py
  * existing target is not owned by stow: skill-creator/scripts/run_eval.py
  * existing target is not owned by stow: skill-creator/scripts/run_loop.py
  * existing target is not owned by stow: skill-creator/scripts/utils.py
All operations aborted.
Traceback (most recent call last):
  File "/Users/ren/switchdrive/backup/dev/_HEVS/opengrader/install.py", line 106, in <module>
    main()
  File "/Users/ren/switchdrive/backup/dev/_HEVS/opengrader/install.py", line 102, in main
    install_stow()
  File "/Users/ren/switchdrive/backup/dev/_HEVS/opengrader/install.py", line 66, in install_stow
    subprocess.run(
  File "/Users/ren/miniconda3/lib/python3.12/subprocess.py", line 573, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['stow', '-t', '/Users/ren/.config/opencode/skills', '-d', '/Users/ren/switchdrive/backup/dev/_HEVS/opengrader', 'skills']' returned non-zero exit status 1.