ci: work around macOS pip restrictions

macOS 15 (Sequoia)'s pip by default refuses to install packages that may
produce conflicts with the system-wide Python environment. Work around
this by over-riding pip's default safety measures.

The sphinx package installed by pip3 does not work for some reason.
Install sphinx support via homebrew instead.

We may one day need to install Python packages needed for our test
harness in a virtual environment and run the test script in the same
virtual environment. For now just fix up macOS and revisit this for
other platforms later.

Signed-off-by: Vincent Fu <[email protected]>

Author: vincentkfu

ci/actions-install.sh

@@ -191,8 +191,8 @@ install_macos() {
     #echo "Updating homebrew..."
     #brew update >/dev/null 2>&1
     echo "Installing packages..."
-    HOMEBREW_NO_AUTO_UPDATE=1 brew install cunit libnfs
-    pip3 install scipy six statsmodels sphinx
+    HOMEBREW_NO_AUTO_UPDATE=1 brew install cunit libnfs sphinx-doc
+    pip3 install scipy six statsmodels --user --break-system-packages
 }
 
 install_windows() {