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GHA CI cleanups: Use action for installing rtools, restrict parallelism #3348

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GHA CI cleanups: Use action for installing rtools, restrict parallelism #3348

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Use standard action for rtools, restrict parallelism
andrjohns Jul 19, 2026
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andrjohns Jul 19, 2026
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39 changes: 11 additions & 28 deletions .github/workflows/main.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ jobs:
runs-on: ${{ matrix.os }}
strategy:
fail-fast: false
max-parallel: 5
matrix:
os: [windows-11-arm, windows-latest, ubuntu-24.04-arm]
config: [
Expand All @@ -43,24 +44,14 @@ jobs:

- name: Download and Install Rtools45
if: runner.os == 'Windows'
run: |
$ARCH = if ('${{ matrix.os }}' -eq 'windows-11-arm') { 'aarch64' } else { 'x86_64' }
$RTOOLS = if ('${{ matrix.os }}' -eq 'windows-11-arm') { "rtools45-$ARCH" } else { 'rtools45' }

# Installation will hang if the toolchain is already installed
if (-Not $(Test-Path -Path "C:/$RTOOLS")) {
Invoke-WebRequest `
-Uri https://github.com/r-hub/rtools45/releases/download/latest/$RTOOLS.exe `
-OutFile "$RTOOLS.exe"
Start-Process -FilePath "$RTOOLS.exe" -ArgumentList "/INSTALL /VERYSILENT /SUPPRESSMSGBOXES" -Wait
}

echo "C:/$RTOOLS/usr/bin;C:/$RTOOLS/$ARCH-w64-mingw32.static.posix/bin" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
echo "$(pwd)/lib/tbb" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
uses: r-lib/actions/setup-r@v2
with:
r-version: 'release'

- name: Build Math libs
shell: pwsh
run: |
echo "$(pwd)/lib/tbb" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
Add-Content make\local "CPPFLAGS=-w -Wno-psabi -Wno-misleading-indentation`n"
Add-Content make\local "STAN_THREADS=true`n"
make -f make/standalone math-libs -j2
Expand All @@ -82,6 +73,7 @@ jobs:
runs-on: ${{ matrix.os }}
strategy:
fail-fast: false
max-parallel: 5
matrix:
os: [windows-11-arm, windows-latest, ubuntu-24.04-arm]
group: [1, 2, 3, 4, 5]
Expand All @@ -94,24 +86,15 @@ jobs:

- name: Download and Install Rtools45
if: runner.os == 'Windows'
run: |
$ARCH = if ('${{ matrix.os }}' -eq 'windows-11-arm') { 'aarch64' } else { 'x86_64' }
$RTOOLS = if ('${{ matrix.os }}' -eq 'windows-11-arm') { "rtools45-$ARCH" } else { 'rtools45' }

# Installation will hang if the toolchain is already installed
if (-Not $(Test-Path -Path "C:/$RTOOLS")) {
Invoke-WebRequest `
-Uri https://github.com/r-hub/rtools45/releases/download/latest/$RTOOLS.exe `
-OutFile "$RTOOLS.exe"
Start-Process -FilePath "$RTOOLS.exe" -ArgumentList "/INSTALL /VERYSILENT /SUPPRESSMSGBOXES" -Wait
}

echo "C:/$RTOOLS/usr/bin;C:/$RTOOLS/$ARCH-w64-mingw32.static.posix/bin" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
echo "$(pwd)/lib/tbb" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
uses: r-lib/actions/setup-r@v2
with:
r-version: 'release'


- name: Build Math libs
shell: pwsh
run: |
echo "$(pwd)/lib/tbb" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
Add-Content make\local "CPPFLAGS=-w -Wno-psabi -Wno-misleading-indentation`n"
Add-Content make\local "STAN_THREADS=true`n"
make -f make/standalone math-libs -j2
Expand Down