kou commented on code in PR #11666:
URL: https://github.com/apache/arrow/pull/11666#discussion_r855187404
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ci/docker/linux-r.dockerfile:
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@@ -33,6 +33,9 @@ ENV DEVTOOLSET_VERSION=${devtoolset_version}
ARG r_prune_deps=FALSE
ENV R_PRUNE_DEPS=${r_prune_deps}
+ARG r_custom_ccache=false
+ENV R_CUSTOM_CCACHE=${r_custom_ccache}
Review Comment:
It seems that this environment variable isn't used.
Is it a typo of `R_BUILD_CCACHE`?
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