Release new major v5.0.0

[ralphtheninja]

Just making an issue for this for referencing other ongoing work. We will release some rc's first and once we have released v5.0.0 we should feed back into nodejs/node#25060

[ralphtheninja]

@Level/core I just released a premajor for leveldown. You can try it out with npm i leveldown@next.

[rvagg]

I didn't realise we'd been so long since the last release, and wow there are lot of commits.

If anyone else is interested here's the changelog so far (changelog-maker --start-ref=v4.0.1, also props to @ralphtheninja for so much of this work):

• [50a7d6f0c0] - Remove xcacheSize and xmaxOpenFiles from leak tests (Remove xcacheSize and xmaxOpenFiles from leak tests #569) (Lars-Magnus Skog)
• [d73afd860e] - 5.0.0-0 (Lars-Magnus Skog)
• [0c4b9783c8] - Changelog and upgrade guide for v5.0.0-rc1 (Changelog and upgrade guide for v5.0.0-rc1 #548) (Vincent Weevers)
• [0e88cdefcd] - Remove node 6, use prebuildify fork for now, build on node 8 (Remove node 6, use prebuildify fork for now, build on node 8 #562) (Lars-Magnus Skog)
• [15536f9a7c] - Add publish instructions and download-prebuilds npm script (Add publish instructions and download-prebuilds npm script #564) (Vincent Weevers)
• [19118ce241] - mention electron in supported platforms (Mention electron in supported platforms #563) (Vincent Weevers)
• [21080032e7] - Remove 32 bits from appveyor (Remove 32 bits from appveyor #560) (Lars-Magnus Skog)
• [6c316a23d7] - Document new platform support and prebuilt binaries (Document new platform support and prebuilt binaries #558) (Vincent Weevers)
• [1c30125280] - Document batch (array and chained form), sync option and db refs (Document batch (array and chained form), sync option and db refs #556) (Vincent Weevers)
• [eaa2b281e3] - Set NAPI_VERSION to 3 (Set NAPI_VERSION to 3 #559) (Lars-Magnus Skog)
• [d08c48f91c] - Update minimum node version required (Update minimum node version required #552) (Lars-Magnus Skog)
• [45cab1cb07] - Use prebuildify (Use prebuildify #549) (Lars-Magnus Skog)
• [c2fefcf4c0] - Merge pull request Napi rewrite #540 from ralphtheninja/napi (Lars-Magnus Skog)
• [e80be43b9b] - Pass in leveldb::Slice into workers and not napi values (Lars-Magnus Skog)
• [d4dd7f047a] - Tweak back if-statements to be more clear (Lars-Magnus Skog)
• [42da176853] - Remove nan/v8 based glue code (Lars-Magnus Skog)
• [647c3dd77f] - Compress constructor arguments a little bit (Lars-Magnus Skog)
• [4bcffea3c8] - Refactor some of the hideous iterator property code (Lars-Magnus Skog)
• [41c19a24ed] - Refactor calling code into CallFunction() (Lars-Magnus Skog)
• [cb34bf0ccb] - Use new instead of malloc to keep similar memory handling everywhere (Lars-Magnus Skog)
• [6aca8c8ba6] - Only need to set filterPolicy once when Database object is created (Lars-Magnus Skog)
• [885574974b] - Dispose data pointed to by instances of leveldb::Slice (Lars-Magnus Skog)
• [d6001e1e05] - Fix some napi commands + clean up old comments and reduce some if-statements (Lars-Magnus Skog)
• [cb15d6e485] - Clean up debug printf (Lars-Magnus Skog)
• [02ccedab25] - Reset back to normal testing (Lars-Magnus Skog)
• [1dfe434327] - .destroy() now calls back with null (Lars-Magnus Skog)
• [50062ad5fd] - Accidentally disabled all tests but one :) (Lars-Magnus Skog)
• [ce049ddd47] - Implement db_get_property() (Lars-Magnus Skog)
• [a1f94dab84] - Implement repair_db() (Lars-Magnus Skog)
• [ad079a561f] - Implement destroy_db() (Lars-Magnus Skog)
• [0790470692] - Implement db_compact_range() (Lars-Magnus Skog)
• [fc46554f34] - Fix "iterator has ended" error (Lars-Magnus Skog)
• [023deaee10] - Fix ending open iterators while closing database (+ reorder Iterator struct) (Lars-Magnus Skog)
• [8aba0c3eb4] - Implement dc_approximate_size() (Lars-Magnus Skog)
• [60b79828fd] - Implement the rest of iterator_seek() (Lars-Magnus Skog)
• [79966afcca] - Implement chained batch (+ rename some functions) (Lars-Magnus Skog)
• [52ccc82112] - Implement batch_do() for immediate write operation (Lars-Magnus Skog)
• [64ff8f6a7f] - Add TODO for db_close() (when open iterators) (Lars-Magnus Skog)
• [f7c6d93238] - napi/leveldown.cc -> binding.cc (Lars-Magnus Skog)
• [6f09aaf014] - Reorganize, macros at top, helpers etc (Lars-Magnus Skog)
• [8de66184eb] - Implement db_del() (Lars-Magnus Skog)
• [2acd4b6b54] - Implement db_get() (Lars-Magnus Skog)
• [5613fb5bdd] - Fix error messages (needs to be copied) (Lars-Magnus Skog)
• [57b0be4bfc] - Implement db_close() (Lars-Magnus Skog)
• [043508a785] - Implement iterator.next() and iterator.end() (Lars-Magnus Skog)
• [182a58bf72] - Reuse LD_STRING_OR_BUFFER_TO_COPY() macro in ToSlice() function (Lars-Magnus Skog)
• [6889722fb2] - Implement iterator() (Lars-Magnus Skog)
• [20f2aea52d] - Move leveldb specific calls to Database (Lars-Magnus Skog)
• [3ede7b3d1c] - Lets adopt same naming as for nan case, DbContext -> Database (Lars-Magnus Skog)
• [085ef08597] - Stub out iterator methods (Lars-Magnus Skog)
• [e37cda04f0] - Rename binding functions (Lars-Magnus Skog)
• [1fba29c962] - Refactor common logic from OpenWorker and PutWorker into BaseWorker (Lars-Magnus Skog)
• [9f03290229] - Implement put() (not yet handling buffers) (Lars-Magnus Skog)
• [71e782349a] - Implement open() (Lars-Magnus Skog)
• [11797d8d17] - Implement leveldown function (test/leveldown-test.js pass) (Lars-Magnus Skog)
• [0cf69aec5b] - Bench tweaks (Bench tweaks #546) (Lars-Magnus Skog)
• [b49194f482] - Update db-bench (Update db-bench #545) (Vincent Weevers)
• [d7b73d3e79] - Merge pull request Normalize gyp files #539 from Level/normalize-gyp-files (Lars-Magnus Skog)
• [bc48b15e0d] - Normalize gyp files (indentation and use " everywhere) (Lars-Magnus Skog)
• [a941d96f98] - chore(package): update slump to version 3.0.0 (Update slump to the latest version 🚀 #504) (greenkeeper[bot])
• [c604cc443e] - Serialize compact range options (Serialize compact range options #517) (Vincent Weevers)
• [cbb7459553] - Fix snappy path in .npmignore (Fix snappy path in .npmignore #535) (Philippe Schommers)
• [cdf0f1a2e8] - Merge pull request Upgrade snappy to 1.1.7 #522 from filoozom/upgrade-snappy (Lars-Magnus Skog)
• [d41cc22395] - Fix typo (Vincent Weevers)
• [98bf44998c] - Add documentation about git submodules for developers (Philippe Schommers)
• [030825130a] - Fix AppVeyor build (Philippe Schommers)
• [0ab9cf2658] - Remove git submodule update (Philippe Schommers)
• [d8afaa5d10] - Init submodules (Philippe Schommers)
• [baff261bd8] - Move snappy to a git submodule (Philippe Schommers)
• [983ef6c299] - Upgrade snappy to 1.1.7 (Philippe Schommers)
• [d72a533194] - Make callback of makeTest an error-first callback (Make callback of makeTest an error-first callback #518) (Vincent Weevers)
• [a088f94c1e] - remove unused 'key' argument from ChainedBatch#_clear (Remove unused 'key' argument from ChainedBatch#_clear #519) (Vincent Weevers)
• [392394d687] - Add segfault tests (Add segfault tests #514) (Vincent Weevers)
• [d979b30888] - Merge pull request Finalize next #511 from Level/finalize-next (Vincent Weevers)
• [1e1b1de2cb] - readme: value may not be null or undefined (Vincent Weevers)
• [9631b996d9] - target abstract-leveldown@6 (Vincent Weevers)
• [922057ad8d] - Merge pull request Migrate seek tests to abstract-leveldown #508 from Level/next-migrate-seek-tests (Vincent Weevers)
• [1fb0e4f980] - target Level/abstract-leveldown#b610da0 (Vincent Weevers)
• [87e83cc14d] - remove unused iota-array and lexicographic-integer devDependencies (Vincent Weevers)
• [23222b587d] - moved seek tests to abstract-leveldown (Vincent Weevers)
• [1fd0bdb9b4] - Merge pull request Update next to latest abstract-leveldown #506 from Level/next-serialization2 (Vincent Weevers)
• [1e363aab8b] - implement _serializeKey and _serializeValue (Vincent Weevers)
• [82cdd77323] - implement _seek instead of seek (Vincent Weevers)
• [a007051f8a] - target Level/abstract-leveldown#0f42686 (Vincent Weevers)
• [7b0f6d91c1] - Use suite.common() in test/common.js (Lars-Magnus Skog)
• [5745555a6e] - Target abstract-leveldown#51af868 (Lars-Magnus Skog)
• [52b0777e9c] - Abstract tests single function (Abstract tests single function #495) (Lars-Magnus Skog)
• [e1ac18dbbc] - Location was removed from abstract-leveldown (Location was removed from abstract-leveldown #494) (Lars-Magnus Skog)
• [ab7c1a599d] - Create next branch which targets master branch of abstract-leveldown (Lars-Magnus Skog)
• [0ccf1a27d1] - Merge pull request Update standard to the latest version 🚀 #503 from Level/greenkeeper/standard-12.0.0 (Lars-Magnus Skog)
• [7906d16886] - Fix standard (Lars-Magnus Skog)
• [6bffc43ae5] - chore(package): update standard to version 12.0.0 (greenkeeper[bot])
• [55559b4bc9] - fix(package): update prebuild-install to version 5.0.0 (Update prebuild-install to the latest version 🚀 #490) (greenkeeper[bot])
• [7142cebc33] - chore(package): update prebuild to version 8.0.0 (Update prebuild to the latest version 🚀 #502) (greenkeeper[bot])
• [627c7e33ab] - fix(package): update nan to version 2.11.0 (Update nan to the latest version 🚀 #501) (greenkeeper[bot])
• [819946c7ab] - Add nyc and coveralls (Add nyc and coveralls #497) (Lars-Magnus Skog)
• [0f5f554e86] - Remove node 9 (Lars-Magnus Skog)
• [1d122b02b8] - Remove .jshintrc (Lars-Magnus Skog)
• [508027dcae] - Remove copyright headers from code (Lars-Magnus Skog)
• [8a29ecc714] - Remove contributors from package.json (Lars-Magnus Skog)
• [aea8613c6d] - Remove g++-4.8 apt package from Travis (Remove g++-4.8 apt package from Travis #489) (Lars-Magnus Skog)
• [d04f233540] - Remove redundant db.close() from test/approximate-size-test.js (Lars-Magnus Skog)
• [f8077cf07d] - Tweak changelog (Tweak changelog #483) (Lars-Magnus Skog)
• [98cbb4f733] - Tweak copyright years for less maintenance (Lars-Magnus Skog)

[ralphtheninja]

@rvagg Hi! Nice to see you around! 👋

[vweevers]

Also see the changelog and upgrade guide which summarize the above.

[vweevers]

@Level/core I released level v5.0.0-0, containing the leveldown prerelease and level-js for browser support. You can try it out with npm i level@next. Makes it easier to test leveldown too. Happy new year!

[digitalinfinity]

Hi @ralphtheninja - I'm on the n-api working group in Node. Congratulations on this release- very exciting to see an n-api version of leveldown get released- thank you for all your hard work on this!

Is there a roadmap published somewhere that I can look at? I'm curious when 5.0 will become the default version in npm.

[ralphtheninja]

@digitalinfinity No roadmap. We want to sort out cross compiled binaries first and it would be nice to get some testing done in related projects. I'm guessing we will release it soon ;)