FastText Golang Wrapper

Overview

Here's my attempt at wrapping FastText C++ library with Golang CGO.

Requirements

git
make
And other requirements for the FastText library.

Compiling

Clone the FastText git repository & compile it.

$ wget https://github.com/facebookresearch/fastText/archive/v0.9.2.zip
$ unzip v0.9.2.zip
$ cd fastText-0.9.2
$ make

Clone this repository & copy all the .o from fastText-0.9.2 into directory inside fasttext-go-wrapper/fastText/obj.

$ git clone https://github.com/fkurushin/fasttext-go-wrapper
$ mkdir fasttext-go-wrapper/fastText/obj
$ cp fastText-0.9.2/*.o fasttext-go-wrapper/fastText/obj
$ cp fastText-0.9.2/src/*.h fasttext-go-wrapper/fastText/include/fastText

Compile the C project

$ cd fasttext-go-wrapper/fastText && make

Build the Go package normally (in the fasttext-go-wrapper/ dir)
```
$ go build
```

If error with linker occures in MacOS

$ sudo cp fasttext-go-wrapper/fastText/lib/libfasttext-wrapper.a /usr/local/lib/

Basic usage

Initialization

model, err = fasttext.New(modelName)
if err != nil {
    panic(err)
}

Predict vector

vec, err := model.GetSentenceVector(sentence)
if err != nil {
    panic(err)
}

be aware that this method returns a non-normalized vector

Get model dimension

d, err := model.GetDimension()
if err != nil {
	panic(err)
}

Example of Dockerfile

WORKDIR /src
RUN wget https://github.com/facebookresearch/fastText/archive/v0.9.2.zip && \
    unzip v0.9.2.zip

WORKDIR /src/fastText-0.9.2
RUN make

WORKDIR /src
RUN git clone https://github.com/fkurushin/fasttext-go-wrapper && \
    rm v0.9.2.zip

WORKDIR /src/fasttext-go-wrapper/fastText/obj
RUN cp ../../../fastText-0.9.2/*.o .

WORKDIR /src/fasttext-go-wrapper/fastText
RUN make