hit: Git operations

[ bsd3, development, library ] [ Propose Tags ]

Provides low level git operations

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Versions 0.1.0, 0.2.0, 0.2.1, 0.2.2, 0.3.0, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.5.0, 0.5.1, 0.5.2, 0.5.3, 0.5.4, 0.5.5, 0.6.0, 0.6.1, 0.6.2, 0.6.3
Dependencies attoparsec, base (==4.*), bytedump, bytestring, containers, cryptohash, directory, filepath, hashable, hashtables, HUnit, mtl, parsec (>=3), patience, QuickCheck (>=2), random, test-framework (>=0.3), test-framework-quickcheck2 (>=0.2), unix, vector, zlib, zlib-bindings (>=0.0.1) [details]
License BSD-3-Clause
Copyright Vincent Hanquez <vincent@snarc.org>
Author Vincent Hanquez <vincent@snarc.org>
Maintainer Vincent Hanquez <vincent@snarc.org>
Category Development
Home page http://github.com/vincenthz/hit
Source repo head: git clone git://github.com/vincenthz/hit
Uploaded by VincentHanquez at Thu Sep 22 21:36:54 UTC 2011
Distributions Debian:0.6.3, LTSHaskell:0.6.3, NixOS:0.6.3, openSUSE:0.6.3
Executables Tests, Hit
Downloads 7976 total (65 in the last 30 days)
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Status Docs uploaded by user
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Readme for hit-0.1.0

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Hit is a reimplementation of some git operations in pure haskell.

what it does do:

  • read loose objects, and packed objects.
  • write new loose objects
  • git like operations available: commit, cat-file, verify-pack, rev-list, ls-tree.

what is doesn't do:

  • reimplement the whole of git.
  • checkout's index reading/writing, fetching, merging, diffing.

The main functions for users are available from the Data.Git.Repository module.

The essential functions are:

  • withRepo: create a new git context and execute a function with the context. functional equivalent of withFile but for git repository.
  • resolveRevision: turns a git revision (e.g. HEAD, 0a24^^^~3) into a SHA1 reference.
  • resolvePath: from a commit ref and a path, it will gives the tree or blob reference of the object at the specific path (see example).
  • findObject: from a SHA1 reference, gives a high level object (Commit, Blob, Tree, Tag, Delta) from the git repository. if called with resolveDelta set, it will resolves deltas to be simple objects with the deltas applied.
  • findObjectRaw: similar to findObject but gives a raw representation (lazy bytestring) of the object.

API Example

resolving path of the README file and returning the reference to the blob :

{-# LANGUAGE OverloadedStrings #-}
import Data.Git.Repository

showPathRef commitRef = withRepo ".git" $ \git -> do
ref <- maybe (error "inexistent object at this path") id `fmap` resolvePath git commitRef ["README"]
    putStrLn ("README has the reference: " ++ show ref)

catting an object from a ref:

import Data.Git.Repository

catFile ref = withRepo ".git" $ \git -> do
obj <- maybe (error "not a valid object") id `fmap` findObjectRaw git ref True
    L.putStrLn (oiData obj)

more examples on how to use api can be found in Hit.hs.