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ci(windows): clear stale CMake cache to fix VS18 generator mismatch
The restored Windows build cache (C:/t) holds a CMakeCache.txt generated with VS 17 2022; the runner image moved to VS 18 2026, so whisper-rs-sys's CMake build aborts with "generator does not match the generator used previously". Drop CMakeCache.txt/CMakeFiles under C:/t before building in release, nightly and ci workflows. sccache still caches the C++ compiles.
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‎.github/workflows/ci.yml‎

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# an absolute path — use `cache-directories` instead.
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cache-directories: ${{ matrix.platform == 'windows-latest' && 'C:/t' || '' }}
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# A restored Windows build cache (C:/t) may hold a CMakeCache.txt from an
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# older VS generator (e.g. VS 17 2022). When the runner image moves to a
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# newer VS (18 2026), CMake aborts: "generator does not match the generator
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# used previously". Drop the stale CMake config so whisper-rs-sys
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# reconfigures against the current toolchain (sccache still caches the
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# actual compiles, so the rebuild cost is minimal).
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- name: Clear stale CMake cache (Windows)
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if: matrix.platform == 'windows-latest'
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shell: pwsh
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run: |
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if (Test-Path C:/t) {
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Get-ChildItem -Path C:/t -Recurse -Force -ErrorAction SilentlyContinue |
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Where-Object { $_.Name -eq 'CMakeCache.txt' -or $_.Name -eq 'CMakeFiles' } |
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Remove-Item -Recurse -Force -ErrorAction SilentlyContinue
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}
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- name: Create dist stub for include_dir
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shell: bash
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run: mkdir -p dist && echo '<html></html>' > dist/index.html

‎.github/workflows/nightly.yml‎

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workspaces: './src-tauri -> target'
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cache-directories: ${{ matrix.platform == 'windows-latest' && 'C:/t' || '' }}
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# A restored Windows build cache (C:/t) may hold a CMakeCache.txt from an
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# older VS generator (e.g. VS 17 2022). When the runner image moves to a
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# newer VS (18 2026), CMake aborts: "generator does not match the generator
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# used previously". Drop the stale CMake config so whisper-rs-sys
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# reconfigures against the current toolchain (sccache still caches the
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# actual compiles, so the rebuild cost is minimal).
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- name: Clear stale CMake cache (Windows)
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if: matrix.platform == 'windows-latest'
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shell: pwsh
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run: |
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if (Test-Path C:/t) {
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Get-ChildItem -Path C:/t -Recurse -Force -ErrorAction SilentlyContinue |
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Where-Object { $_.Name -eq 'CMakeCache.txt' -or $_.Name -eq 'CMakeFiles' } |
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Remove-Item -Recurse -Force -ErrorAction SilentlyContinue
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}
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- name: Install frontend dependencies
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run: pnpm install --frozen-lockfile
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‎.github/workflows/release.yml‎

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workspaces: './src-tauri -> target'
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cache-directories: ${{ matrix.platform == 'windows-latest' && 'C:/t' || '' }}
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# A restored Windows build cache (C:/t) may hold a CMakeCache.txt from an
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# older VS generator (e.g. VS 17 2022). When the runner image moves to a
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# newer VS (18 2026), CMake aborts: "generator does not match the generator
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# used previously". Drop the stale CMake config so whisper-rs-sys
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# reconfigures against the current toolchain (sccache still caches the
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# actual compiles, so the rebuild cost is minimal).
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- name: Clear stale CMake cache (Windows)
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if: matrix.platform == 'windows-latest'
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shell: pwsh
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run: |
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if (Test-Path C:/t) {
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Get-ChildItem -Path C:/t -Recurse -Force -ErrorAction SilentlyContinue |
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Where-Object { $_.Name -eq 'CMakeCache.txt' -or $_.Name -eq 'CMakeFiles' } |
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Remove-Item -Recurse -Force -ErrorAction SilentlyContinue
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}
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- name: Install frontend dependencies
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run: pnpm install --frozen-lockfile
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