WillAyd commented on code in PR #46501:
URL: https://github.com/apache/arrow/pull/46501#discussion_r2110593186
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ci/scripts/cpp_build.sh:
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@@ -287,6 +287,11 @@ fi
if [ "${ARROW_USE_MESON:-OFF}" = "ON" ]; then
time meson compile -j ${ARROW_BUILD_PARALLEL}
meson install
+ # Remove all added files in cpp/subprojects/ because they may have
+ # unreadable permissions on Docker host.
+ pushd "${source_dir}"
+ meson subprojects purge --confirm --include-cache
+ popd
Review Comment:
Ah OK - I was excluding subprojects from my consideration of the source
directory, as Meson does unpack third party dependencies to that directory
during the configure stage (i.e. before the build directory even exists)
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