Library to detect in which programming language a code snippet is written

Question

I am looking for a library that can detect in which programming language a code snippet is written. We can make the assumption that the code snippet is written in one language only.

E.g. for natural languages, I use the Python library guess_language:

>>> from guess_language import guess_language
>>> guess_language("Ces eaux regorgent de renégats et de voleurs.")
'fr'
>>> guess_language("Tienes que seguir tu corazón.")
'es'
>>> guess_language("いいえ！忍者がいます")
'ja'
>>> not guess_language("??")
True

If possible, it should return the probabilities of belonging to each programming language (e.g. for one code snippet given as input, the ouput could be 94% MATLAB, 30% Python, 5% Java, etc). Ideally, callable from Python/Java/C++ (descending order of preference), and free.

Answer 1

Here's one github/linguist that used by github, a ruby library.

Answer 2

Here's another one blackducksw/ohcount see the ohcount_detect_language function, its for C, also has Ruby and Python port.

Answer 3

Another library isagalaev/highlight.js for JavaScript, see the highlightAuto function in highlight.js source, it gives 1 or 2 possible answer.