2020-02-14 22:00:14 +01:00
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# Maintaining zlib
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2020-01-06 01:49:55 +01:00
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2020-02-14 22:00:14 +01:00
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This copy of zlib comes from the Chromium team's zlib fork which incorporated
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performance improvements not currently available in standard zlib.
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2020-01-06 01:49:55 +01:00
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2020-02-14 22:00:14 +01:00
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## Updating zlib
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Update zlib:
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```shell
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git clone https://chromium.googlesource.com/chromium/src/third_party/zlib
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cp deps/zlib/zlib.gyp deps/zlib/win32/zlib.def deps
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rm -rf deps/zlib zlib/.git
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mv zlib deps/
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mv deps/zlib.gyp deps/zlib/
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mkdir deps/zlib/win32
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mv deps/zlib.def deps/zlib/win32
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sed -i -- 's_^#include "chromeconf.h"_//#include "chromeconf.h"_' deps/zlib/zconf.h
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```
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Check that Node.js still builds and tests.
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It may be necessary to update deps/zlib/zlib.gyp if any significant changes have
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occurred upstream.
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## Commiting zlib
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Add zlib: `git add --all deps/zlib`
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Commit the changes with a message like
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```text
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deps: update zlib to upstream d7f3ca9
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Updated as described in doc/guides/maintaining-zlib.md.
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```
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