kou commented on code in PR #46501:
URL: https://github.com/apache/arrow/pull/46501#discussion_r2110355841
##########
ci/scripts/cpp_build.sh:
##########
@@ -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:
Yes. If we don't have this, `cpp/subprojects/` has unreadable files. It
causes an actions/cache error.
(I think that Meson should not change the source directory.)
##########
ci/scripts/cpp_test.sh:
##########
@@ -92,7 +92,9 @@ fi
if [ "${ARROW_USE_MESON:-OFF}" = "ON" ]; then
ARROW_BUILD_EXAMPLES=OFF # TODO: Remove this
meson test \
+ --no-rebuild \
Review Comment:
Yes. If we don't have this, `meson test` re-downloads `cpp/subprojects/`. It
produces unreadable files under source directory. It causes an `actions/cache`
error.
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