Awesome

levigo

levigo is a Go wrapper for LevelDB. This fork provides support for LevelDB 1.4. Use it if needed, but prefer to upgrade your LevelDB version to the one in required by the more recent levigo.

The API has been godoc'ed and is available on the web.

Questions answered at golang-nuts@googlegroups.com.

Building

You'll need the shared library build of LevelDB installed on your machine. The current LevelDB will build it by default.

Now, if you build LevelDB and put the shared library and headers in one of the standard places for your OS, you'll be able to simply run:

go get github.com/jmhodges/levigo

But, suppose you put the shared LevelDB library somewhere weird like /path/to/lib and the headers were installed in /path/to/include. To install levigo remotely, you'll run:

CGO_CFLAGS="-I/path/to/leveldb/include" CGO_LDFLAGS="-L/path/to/leveldb/lib" go get github.com/jmhodges/levigo

and there you go.

In order to build with snappy, you'll have to explicitly add "-lsnappy" to the CGO_LDFLAGS. Supposing that both snappy and leveldb are in weird places, you'll run something like:

CGO_CFLAGS="-I/path/to/leveldb/include -I/path/to/snappy/include"
CGO_LDFLAGS="-L/path/to/leveldb/lib -L/path/to/snappy/lib -lsnappy" go get github.com/jmhodges/levigo

(and make sure the -lsnappy is after the snappy library path!).

Of course, these same rules apply when doing go build, as well.

Caveats

Comparators and WriteBatch iterators must be written in C in your own library. This seems like a pain in the ass, but remember that you'll have the LevelDB C API available to your in your client package when you import levigo.

An example of writing your own Comparator can be found in https://github.com/jmhodges/levigo/blob/master/examples.