# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved.

# Runs tests/python/test_cross_platform_parity.py on Windows and macOS.
#
# Why: that test is the guard that install.sh and install.ps1 stay in
# sync, but today it only runs on ubuntu-latest (auto-discovered by
# studio-backend-ci.yml's "Repo tests (CPU)" job). The test reads both
# installer scripts, and on Windows Path.read_text() defaults to the
# cp1252 locale encoding, so a non-cp1252 byte in install.sh (it already
# contains a U+274C) raises UnicodeDecodeError there even though Linux and
# macOS default to UTF-8. The reads were pinned to encoding="utf-8" in
# #6166; this job keeps that from silently regressing by exercising the
# test on the platforms it claims parity for. Pure pytest, no GPU,
# sub-second, so the matrix is cheap.

name: Cross-platform parity

on:
  pull_request:
    paths:
      - 'install.sh'
      - 'install.ps1'
      - 'tests/python/test_cross_platform_parity.py'
      - '.github/workflows/cross-platform-parity-ci.yml'
  push:
    branches: [main]
    paths:
      - 'install.sh'
      - 'install.ps1'
      - 'tests/python/test_cross_platform_parity.py'
      - '.github/workflows/cross-platform-parity-ci.yml'
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  parity:
    name: parity (${{ matrix.os }})
    strategy:
      fail-fast: false
      matrix:
        os: [windows-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
        with:
          persist-credentials: false
      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
        with:
          python-version: '3.12'
          cache: 'pip'
      - run: python -m pip install -U pip pytest
      - name: Cross-platform parity test
        run: python -m pytest tests/python/test_cross_platform_parity.py -q