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[CI] Use the latest Python available on Windows #71995

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May 8, 2020
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[CI] Use the latest Python available on Windows #71995

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12 changes: 10 additions & 2 deletions src/ci/scripts/install-msys2-packages.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -9,11 +9,19 @@ if isWindows; then
pacman -S --noconfirm --needed base-devel ca-certificates make diffutils tar \
binutils

# Detect the native Python version installed on the agent. On GitHub
# Actions, the C:\hostedtoolcache\windows\Python directory contains a
# subdirectory for each installed Python version.
#
# The -V flag of the sort command sorts the input by version number.
native_python_version="$(ls /c/hostedtoolcache/windows/Python | sort -Vr | head -n 1)"

# Make sure we use the native python interpreter instead of some msys equivalent
# one way or another. The msys interpreters seem to have weird path conversions
# baked in which break LLVM's build system one way or another, so let's use the
# native version which keeps everything as native as possible.
python_home="C:/hostedtoolcache/windows/Python/3.7.6/x64"
python_home="/c/hostedtoolcache/windows/Python/${native_python_version}/x64"
cp "${python_home}/python.exe" "${python_home}/python3.exe"
ciCommandAddPath "C:\\hostedtoolcache\\windows\\Python\\3.7.6\\x64"
ciCommandAddPath "C:\\hostedtoolcache\\windows\\Python\\${native_python_version}\\x64"
ciCommandAddPath "C:\\hostedtoolcache\\windows\\Python\\${native_python_version}\\x64\\Scripts"
fi