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[no-ci] toolshed: modernize conda_create_for_pathfinder_testing scripts#2013

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[no-ci] toolshed: modernize conda_create_for_pathfinder_testing scripts#2013
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rwgk:toolshed_conda_create_for_pathfinder_modernizations

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@rwgk rwgk commented May 4, 2026

Modernizations as used for manually testing changes under PR #1977 (xref issue #1038) with Conda Linux and Windows:

Test results: #1977 (comment)

Separate PR to remove a distraction from the bigger set of changes.

Bring the bash and PowerShell helpers used to spin up CUDA-pathfinder
test environments into line with how cuda_pathfinder/pyproject.toml is
now organized, and harden them so common shell mistakes surface
immediately.

Highlights:

- Add ``set -euo pipefail`` (bash) and ``Set-StrictMode -Version Latest``
  (PowerShell) so unset variables and non-zero exit codes fail loudly.
- Pick the Python version from the CUDA major: ``12.x`` -> 3.12,
  ``13.x`` -> 3.14. Reject other CUDA majors with a clear error
  instead of silently installing 3.13.
- Bash: wrap ``conda activate`` and ``conda install`` in ``set +u`` /
  ``set -u`` because conda's shims dereference unset variables, which
  otherwise abort the script under ``set -u``.
- Realign the conda package lists with the platform-scoped groups in
  ``cuda_pathfinder/pyproject.toml``:
  - Add ``cutlass`` (Linux + Windows) and ``libcusolvermp-dev`` (Linux).
  - Drop ``libnvpl-fft-dev`` from the unconditional Linux list and from
    Windows entirely.
  - On Linux, install ``libnvpl-fft-dev`` only on ``aarch64`` and add
    ``libcudla-dev`` for the ``cu13``/``aarch64`` combination.
  - Drop ``libcublasmp-dev``, ``libcufftmp-dev``, ``libnvshmem3``, and
    ``libnvshmem-dev`` from the Windows list to match what ``pyproject``
    installs there.
- Refresh SPDX copyright to ``2025-2026``.

Co-authored-by: Cursor <cursoragent@cursor.com>
@rwgk rwgk added this to the cuda.pathfinder next milestone May 4, 2026
@rwgk rwgk self-assigned this May 4, 2026
@rwgk rwgk added P1 Medium priority - Should do test Improvements or additions to tests cuda.pathfinder Everything related to the cuda.pathfinder module labels May 4, 2026
@rwgk rwgk requested a review from rparolin May 4, 2026 17:30
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