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I am trying to write a java program that should analyse at runtime Log history information of any <<input>> given Git Repository (grab authors, date, path of files, modifications and actions on these files such as Modify Add Delete etc...). But I'm figuring out one main issue :

1: Is it possible to directly execute git commands from my java code maybe using some libraries that will avoid me first need to Clone the repository and execute a git log...?? (a kind of svnKit library for GIT ? )

Note the main goal at the end of this process is to have these Log history informations in a Xml output file - Any library to achieve this ? - Or i would need to parse and build on my own the xml file..?

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You can use JGit; however, JGit will still need to be told to clone the repository.

If you just want the history of a repository as a single file, there is a standard for this, and it's called the git-fast-import file format. You can produce a git-fast-import file for a git repository using the command git fast-export.

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i'm trying to figure out how to call this git fast-export. should i first have to install JGit ? or i can call it without ? can you please provide me a short example assuming for example that i whant to fetch info from code.google.com/p/gitblit Thanks in advance..
git fast-export is part of the Git suite; it is nothing to do with JGit. So yes, you can call it without it. To do it in Java you can use ProcessBuilder; alternatively, to do it in a bash shell script you can just write git clone repository-url ; cd repository ; git fast-export

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