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Add GitHub Actions workflow for archive determinism testing
Builds and archives a test fixture on both Windows and Linux runners, verifying same-platform determinism and comparing cross-platform output. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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‎.gitattributes‎

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###############################################################################
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* text=auto
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# Test fixtures must be byte-identical across platforms
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test-fixture/** -text
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###############################################################################
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# Set default behavior for command prompt diff.
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#

‎.github/workflows/determinism.yml‎

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name: Archive Determinism Check
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on:
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push:
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branches: [master]
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pull_request:
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branches: [master]
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workflow_dispatch:
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jobs:
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build-archive:
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strategy:
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matrix:
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os: [ubuntu-latest, windows-latest]
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runs-on: ${{ matrix.os }}
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steps:
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- uses: actions/checkout@v4
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with:
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submodules: recursive
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- uses: actions/setup-dotnet@v4
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with:
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dotnet-version: '8.0.x'
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- name: Print .NET info
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run: dotnet --info
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- name: Build
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run: dotnet build MS2Tools.sln -c Release
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- name: Run tests
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run: dotnet test MS2Lib/MS2Lib.Tests/MS2Lib.Tests.csproj -c Release --no-build
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- name: Create archive (run 1)
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run: dotnet run --project MS2Create -c Release --no-build -- ./test-fixture ./out1 Test MS2F
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- name: Create archive (run 2)
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run: dotnet run --project MS2Create -c Release --no-build -- ./test-fixture ./out2 Test MS2F
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- name: Hash outputs
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shell: bash
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run: |
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sha256sum out1/Test.m2d out1/Test.m2h > hashes-run1.txt
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sha256sum out2/Test.m2d out2/Test.m2h > hashes-run2.txt
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echo "=== Run 1 ==="
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cat hashes-run1.txt
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echo "=== Run 2 ==="
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cat hashes-run2.txt
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- name: Verify same-platform determinism
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shell: bash
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run: |
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if diff hashes-run1.txt hashes-run2.txt; then
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echo "PASS: Same-platform runs are identical"
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else
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echo "FAIL: Same-platform runs differ!"
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exit 1
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fi
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- name: Upload hashes
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uses: actions/upload-artifact@v4
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with:
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name: hashes-${{ matrix.os }}
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path: hashes-run1.txt
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- name: Upload archive
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uses: actions/upload-artifact@v4
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with:
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name: archive-${{ matrix.os }}
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path: out1/
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compare-platforms:
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needs: build-archive
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runs-on: ubuntu-latest
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steps:
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- name: Download Windows hashes
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uses: actions/download-artifact@v4
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with:
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name: hashes-windows-latest
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path: win
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- name: Download Linux hashes
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uses: actions/download-artifact@v4
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with:
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name: hashes-ubuntu-latest
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path: linux
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- name: Compare cross-platform hashes
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run: |
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echo "=== Windows ==="
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cat win/hashes-run1.txt
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echo "=== Linux ==="
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cat linux/hashes-run1.txt
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echo "=== Diff ==="
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if diff win/hashes-run1.txt linux/hashes-run1.txt; then
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echo "PASS: Cross-platform archives are identical"
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else
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echo "INFO: Cross-platform archives differ (expected due to native zlib differences)"
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echo "This is not a failure — see workflow summary for details."
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fi

‎test-fixture/a.xml‎

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<ms2>
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<environment>
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<property name="test" value="determinism check" />
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<property name="id" value="1001" />
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<property name="description" value="This is a test fixture for verifying cross-platform archive determinism." />
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</environment>
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</ms2>

‎test-fixture/b.xml‎

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<ms2>
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<npc id="2001" name="TestNPC">
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<stats hp="1000" mp="500" level="10" />
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<dialogue>
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<line id="1">Hello adventurer!</line>
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<line id="2">Welcome to MapleStory 2.</line>
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</dialogue>
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</npc>
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</ms2>

‎test-fixture/subdir/c.xml‎

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<ms2>
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<item id="30000001" name="Sword of Testing">
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<stats attack="100" defense="0" speed="5" />
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<requirements level="1" job="knight" />
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<description>A trusty sword used for testing archive determinism.</description>
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</item>
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</ms2>

‎test-fixture/subdir/d.zlib‎

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Binary test content for zlib compression type detection.
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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

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