Karl Dunkle Werner created ARROW-13768:
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Summary: [R] Allow JSON to be an optional component
Key: ARROW-13768
URL: https://issues.apache.org/jira/browse/ARROW-13768
Project: Apache Arrow
Issue Type: Task
Components: R
Affects Versions: 5.0.0
Reporter: Karl Dunkle Werner
JSON support requires RapidJSON, a third-party dependency that might not always
be available. Particularly for offline static builds (ARROW-12981), it would be
nice to allow {{ARROW_JSON=OFF}}.
Here's the [relevant
section|https://github.com/apache/arrow/blob/64bef2ad8d9cd2fea122cfa079f8ca3fea8cdf5d/cpp/cmake_modules/ThirdpartyToolchain.cmake#L290-L292]
of {{ThirdpartyToolchain.cmake}}:
{code:none}
if(ARROW_JSON)
set(ARROW_WITH_RAPIDJSON ON)
endif()
{code}
And the [relevant
section|https://github.com/apache/arrow/blob/64bef2ad8d9cd2fea122cfa079f8ca3fea8cdf5d/r/inst/build_arrow_static.sh#L62]
of the {{build_arrow_static.sh}} script.
As Neal
[mentioned|https://github.com/apache/arrow/pull/11001#discussion_r696723923],
there's more to do than just replacing {{-DARROW_JSON=ON}} with
{{-DARROW_JSON=$\{ARROW_JSON:-ON}}}. "We'll have to conditionally build some of
the bindings like we do with dataset and parquet, and we'll have to
conditionally skip tests."
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