Make lz4 module optional
#246
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Signed-off-by: Levko Kravets <levko.ne@gmail.com>
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Signed-off-by: Levko Kravets <levko.ne@gmail.com>
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Fixes #245
lz4module is partially built from C sources during installation. This process requires some build tools available on user's machine. While on Linux machines it's typically available, it may not be true for others. Unfortunately, we cannot replacelz4by other library because it's the only LZ4 implementation for Node that supports LZ4 frame API.Proposed solution is to make
lz4dependency optional. With this change, package manager won't fail iflz4cannot be installed, but we should be ready thatlz4dependency may be missing. When it's not available, we completely disable LZ4 support in the library - don't sentcanDecompressLZ4Resultto Thrift server, and add guards everywherelz4is used.