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[CI][Github] Install Clang in Windows container #164519

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merged 5 commits into from
Oct 23, 2025
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[CI][Github] Install Clang in Windows container #164519

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8dc19da
[CI][Github] Install Clang in Windows container
cmtice Oct 21, 2025
dfc1898
Address some reviewer comments:
cmtice Oct 23, 2025
7015843
Put cleaning up clang download in same layer as download event.
cmtice Oct 23, 2025
4a58bdd
Add md5 checksum checks on the downloaded files.
cmtice Oct 23, 2025
39db1d2
Use Docker ENV keyword to define LLVM_VERSION.
cmtice Oct 23, 2025
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42 changes: 42 additions & 0 deletions .github/workflows/containers/github-action-ci-windows/Dockerfile
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Expand Up @@ -98,3 +98,45 @@ RUN powershell -Command \
Add-Type -AssemblyName System.IO.Compression.FileSystem ; \
[System.IO.Compression.ZipFile]::ExtractToDirectory('actions-runner-win.zip', $PWD) ;\
rm actions-runner-win.zip

# Set the LLVM_VERSION environment variable
RUN powershell -Command [Environment]::SetEnvironmentVariable('LLVM_VERSION', '21.1.2', 'Machine')

# Download and extract Clang compiler.
# Create directories, download, extract, and clean up all in one layer
RUN powershell -Command \
# --- Setup directories --- \
Write-Host "Creating directories..."; \
New-Item -Path "C:\temp-download" -ItemType "Directory" -Force ; \
New-Item -Path "C:\xz-utils" -ItemType "Directory" -Force ; \
New-Item -Path "C:\clang" -ItemType "Directory" -Force ; \
# --- 1. Download and extract xz --- \
Set-Location C:\temp-download ; \
Invoke-WebRequest -Uri "https://github.com/tukaani-project/xz/releases/download/v5.8.1/xz-5.8.1-windows.zip" -OutFile "xz.zip"; \
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Is it possible to verify a checksum here? Similar to what we do for sccache in the linux container:

llvm-project/.github/workflows/containers/github-action-ci/Dockerfile

Line 77 in 93dd17a

echo $( [ $(arch) = 'x86_64' ] && echo "1fbb35e135660d04a2d5e42b59c7874d39b3deb17de56330b25b713ec59f849b" || echo "d6a1ce4acd02b937cd61bc675a8be029a60f7bc167594c33d75732bbc0a07400") /tmp/sccache.tar.gz | sha256sum -c && \

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Done (I think).

(Get-FileHash -Path "C:\temp-download\xz.zip" -Algorithm MD5).Hash -eq 'c3c69fdce3e825cc0b76123b36b0bcc2' ; \
Add-Type -AssemblyName "System.IO.Compression.FileSystem"; \
[System.IO.Compression.ZipFile]::ExtractToDirectory('C:\temp-download\xz.zip', 'C:\xz-utils'); \
# --- 2. Download and decompress Clang --- \
Invoke-WebRequest -Uri "https://github.com/llvm/llvm-project/releases/download/llvmorg-21.1.2/clang+llvm-21.1.2-x86_64-pc-windows-msvc.tar.xz" -OutFile "clang+llvm-21.1.2-x86_64-pc-windows-msvc.tar.xz" ; \
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Can we pull the version number here into an ENV line?

llvm-project/.github/workflows/containers/github-action-ci/Dockerfile

Line 5 in 93dd17a

ENV LLVM_VERSION=21.1.3

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Done

(Get-FileHash -Path "C:\temp-download\clang+llvm-21.1.2-x86_64-pc-windows-msvc.tar.xz" -Algorithm MD5).Hash -eq '0ae1d3effd9ab9d323f7fa595777f0a2' ; \
C:\xz-utils\bin_x86-64\xz.exe -d -qq clang+llvm-21.1.2-x86_64-pc-windows-msvc.tar.xz ; \
# --- 3. Extract clang --- \
C:\Windows\System32\tar.exe -xf clang+llvm-21.1.2-x86_64-pc-windows-msvc.tar -C C:\clang ; \
# --- 4. Clean up --- \
Set-Location C:\ ; \
Remove-Item C:\temp-download -Recurse -Force; \
Remove-Item C:\xz-utils -Recurse -Force; \
# -- 5. Shorten path to clang files & remove unnecessary files -- \
Set-Location C:\clang ; \
Rename-Item -Path "C:\clang\clang+llvm-21.1.2-x86_64-pc-windows-msvc" -NewName "C:\clang\clang-msvc" ; \
Set-Location C:\clang\clang-msvc ; \
Remove-Item -Path C:\clang\clang-msvc\libexec -Recurse -Force ; \
Remove-Item -Path C:\clang\clang-msvc\share -Recurse -Force ; \
Rename-Item -Path "C:\clang\clang-msvc\bin" -NewName "C:\clang\clang-msvc\bin-full" ; \
New-Item -Path "C:\clang\clang-msvc\bin" -ItemType Directory -Force ; \
Set-Location C:\clang\clang-msvc\bin ; \
Copy-Item -Path C:\clang\clang-msvc\bin-full\*.dll -Destination C:\clang\clang-msvc\bin\. ; \
Copy-Item -Path C:\clang\clang-msvc\bin-full\clang-cl.exe -Destination C:\clang\clang-msvc\bin\. ; \
Copy-Item -Path C:\clang\clang-msvc\bin-full\lld-link.exe -Destination C:\clang\clang-msvc\bin\. ; \
Set-Location C:\clang\clang-msvc ; \
Remove-Item -Path C:\clang\clang-msvc\bin-full -Recurse -Force ;
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