From: Farrukh Najmi <farrukh@wellfleetsoftware.com>
Date: Wed, 12 Nov 2008 17:56:20 GMT
Subject: Re: Newbie questions regarding jgit
Message-ID: <491B18C4.2070000@wellfleetsoftware.com>
In-Reply-To: <491AE91C.4020402@wellfleetsoftware.com>


So far I have figured out how to get the treeWalk for the path filter as 
shown below.
Now I am lost as to how to get the blob associated with the treeWalk. 
TIA for your help.

   /**
    * Gets the content of specified file in git Repo.
    *
    * @parameter relativePath the relative path in jitRepo for  desired 
file to get
    * @parameter versionName the versionName for the desired file. It 
will be unmarshalled from String to ObjectId.
    * @return the content of the desired file version packaged as a 
DataHandler.
    */
   public DataHandler get(String relativePath, String versionName) 
throws RepositoryException {
            ObjectId retrieveStart = repository.resolve(versionName);
            RevWalk revWalk = new RevWalk(repository);
            RevCommit entry = revWalk.parseCommit(retrieveStart);
            RevTree revTree = entry.getTree();

            TreeWalk treeWalk = TreeWalk.forPath(repository, 
relativePath, revTree);

            //Not sure how to get the blob next
   }

Farrukh Najmi wrote:
....
> For my immediate needs, I need to implement a GitRepository class with 
> two methods using gjit as shown below. I would appreciate any guidance 
> and pseudo-code examples on how to implement these methods. Please 
> keep in mind that I am just getting to know git itself and gjit was 
> key to my considering git over Mercurial and other distributed VCSs.
>
> public class GitRepositoryManager {
>
>    Repository gitRepo;
>
>    ...
>
>    /**
>     * Gets the content of specified file in git Repo.
>     *
>     * @parameter relativePath the relative path in jitRepo for  
> desired file to get
>     * @parameter versionName the versionName for the desired file. It 
> will be unmarshalled from String to ObjectId.
>     * @return the content of the desired file version packaged as a 
> DataHandler.
>     */
>    public DataHandler get(String relativePath, String versionName) 
> throws RepositoryException {
>        DataHandler dh = null;
>
>        ...
>              return dh;
>    }
>
>    /**
>     * Creates a new version of specified version of file in git Repo.
>     *
>     * @parameter relativePath the relative path in jitRepo for  
> desired file to get
>     * @parameter versionName the versionName for the desired file. It 
> will be unmarshalled from String to ObjectId.
>     * @parameter content the content of the new version for specified 
> file packaged as a DataHandler.
>     */
>    public void update(String relativePath, String versionName, 
> DataHandler content) throws RepositoryException {
>        ...
>    }
>
> }
>
> Farrukh Najmi wrote:
>> Jonas Fonseca wrote:
>> ...
>>>  
>>>> Now I am wondering where to begin to learn how to do the equivalent 
>>>> of the
>>>> following commands via the gjit Java API:
>>>>
>>>>   * git add /file/
>>>>   * git rm /file/
>>>>   * git mv /file
>>>>   * Whatever is the git way to get a specific version of a file
>>>>     
>>>
>>> JGit currently has two APIs for working with the index, which will
>>> allow you to add, remove and move data around in the tree. In nbgit I
>>> ended up using GitIndex, which I found easier to figure out. As I
>>> understand it, in the long run you want to use the DirCache API, but
>>> it is still a work in progress.
>>>   
>>
>> I am happy to use GitIndex now and switch to DirCache API later when 
>> it is ready.
>> Can I please get some pseudo-code fragments on how to do the use 
>> cases I identified above?
>> The javadoc is still not obvious to me.
>>>  
>>>> I am hoping that there aremore docs, samples, tutorials etc. 
>>>> somewhere that
>>>> I am missing. Thanks for any help you can provide. Some pointers or 
>>>> code
>>>> fragments would be terrific.
>>>>     
>>>
>>> I started working on a tutorial for JGit, but didn't get very far so
>>> it mostly consists of stub pages.
>>>
>>>  - http://code.google.com/docreader/#p=egit&s=egit&t=JGitTutorial
>>>
>>> I have been working on moving the tutorial to maven project before
>>> starting to write the more code heavy topics. This would make it
>>> possible to include code snippets in the tutorial, while also allowing
>>> to compile and test the examples.
>>>   
>>
>> The wiki is an awesome resource even in its current state. Thank you.
>> I would be glad to help contribute improvements to wiki if you give me
>> write privilege. What I could do is take the help I get from the list 
>> and
>> then update wiki carefully as appropriate if you want me to help.
>>
>> Thanks again to all of you for helping get me bootstrapped with gjit 
>> and git.
>>
>
>


-- 
Regards,
Farrukh Najmi

Web: http://www.wellfleetsoftware.com