Gitex

• Reference implementation in pure Elixir of the Git object model and storage, including optimized pack-refs and pack-objects (the storage is optimal, not this implementation :-) ).
• Protocols over Git codec and backend to customize them and reuse the same versioning logic in a completely different environment and use case: JSON into Riak for instance.

TODO (DO NOT USE IT SERIOUSLY YET):

• test it
• add a cache logic with an ETS LRU cache
• write commit implementation, currently read-only
• add some useful alternative implementations, currently only standard object encoding and storage

Usage

The main API consists in 2 functions:

• Gitex.get allows you to get "something" on git with a high level logic : fuzzy reference and path to select dir or file.
• Gitex.history gives you a lazy stream to go through the commit history graph from a reference by date

repo = Gitex.RefImpl.new
Gitex.get(repo,"master") #get commit
Gitex.get(repo,"myannotatedtag") #get tag object
Gitex.get(repo,"master","/path/to/dir")  #get tree object
Gitex.get(repo,"master","/path/to/file") #get blob

# get all commits from master to 1st January 2015
Gitex.history(repo,"master") |> Enum.take_while(& &1.committer.utc_time > {{2015,1,1},{0,0,0}})

The low level API is a function to get an object from a hash : Gitex.object

Gitex.object("abbabef2512234112311923874")

A nice function Gitex.align_history allows you to lazily add an index number to your history stream in order to construct a pretty visualizer very easily (d3.js for instance)

Gitex.history(repo,:head) |> Gitex.align_history