Newbie questions regarding jgit

>
> Hi all,
>
> I am git newbie and looking to use jgit in a servlet endpoint.
>
> Where can I find a public maven repo for gjit? It seems there is one 
> somewhere because of the following file in src tree:
>
> jgit-maven/jgit/pom.xml
>
> For now I have built the jar using /make_jgit.sh and installed the pom 
> manually using m
>
> mvn install:install-file -DpomFile=jgit-maven/jgit/pom.xml 
> -Dfile=jgit.jar
>
> I have added the following dependency to my maven project's pom.xml:
>
>   <dependency>
>     <groupId>org.spearce</groupId>
>     <artifactId>jgit</artifactId>
>     <version>0.4-SNAPSHOT</version>
>   </dependency>
>
> 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
>
>
> 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.
>

> 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

> 
> I would also like to have a public available maven repository for
> JGit. If Shawn or Robin acks, I can look into hosting one in the SVN
> area of the Google Code project page. Given the lack of a real release
> cycle it probably only makes sense to have a snapshot repository.

> Jonas Fonseca <jonas.fonseca@gmail.com> wrote:
>> I would also like to have a public available maven repository for
>> JGit. If Shawn or Robin acks, I can look into hosting one in the SVN
>> area of the Google Code project page. Given the lack of a real release
>> cycle it probably only makes sense to have a snapshot repository.
>
> I have an account on kernel.org and was planning on hosting snapshots
> there, but I haven't had time to think about setting up a jgit area
> and pushing something into it.  ;-)

> 
> I don't think admin rights are necessary as long as I have
> "commit"/webdav access. And no svn or git-svn interaction should be
> needed to upload to the maven repository.
> 
> Take a look at the distributionManagement section of the
> google-maven-repository:
> 
>  - http://google-maven-repository.googlecode.com/svn/repository/com/google/google/1/google-1.pom
> 
> Looks pretty easy to set up. About maintaining it, I don't mind doing
> "mvn deploy" once in a while, but some kind of update policy should
> probably be worked out in any case.

>  Shawn O. Pearce <spearce@spearce.org> wrote Tue, Nov 11, 2008:
>  > Jonas Fonseca <jonas.fonseca@gmail.com> wrote:
>  > > I don't think admin rights are necessary as long as I have
>  > > "commit"/webdav access. And no svn or git-svn interaction should be
>  > > needed to upload to the maven repository.
>  > 
>  > Then have at it.  It sounds like it would be worthwhile setting up.
> 
>  Instructions at http://code.google.com/p/egit/wiki/ConfiguringMaven
> 
> diff --git a/jgit-maven/jgit/pom.xml b/jgit-maven/jgit/pom.xml
> index a123470..c370783 100644
> --- a/jgit-maven/jgit/pom.xml
> +++ b/jgit-maven/jgit/pom.xml
> @@ -185,4 +185,12 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>              <scope>compile</scope>
>          </dependency>
>      </dependencies>
> +    <distributionManagement>
> +        <snapshotRepository>
> +            <id>jgit-maven-snapshot-repository</id>
> +            <name>JGit Maven Snapshot Repository</name>
> +            <url>dav:https://egit.googlecode.com/svn/maven/snapshot-repository/</url>

> Jonas Fonseca <fonseca@diku.dk> wrote:
> > +    <distributionManagement>
> > +        <snapshotRepository>
> > +            <id>jgit-maven-snapshot-repository</id>
> > +            <name>JGit Maven Snapshot Repository</name>
> > +            <url>dav:https://egit.googlecode.com/svn/maven/snapshot-repository/</url>
> 
> Shouldn't that be http:// and not https:// ?

> Jonas Fonseca <jonas.fonseca@gmail.com> wrote:
>>
>> I don't think admin rights are necessary as long as I have
>> "commit"/webdav access. And no svn or git-svn interaction should be
>> needed to upload to the maven repository.
>>
>> Take a look at the distributionManagement section of the
>> google-maven-repository:
>>
>>  - http://google-maven-repository.googlecode.com/svn/repository/com/google/google/1/google-1.pom
>>
>> Looks pretty easy to set up. About maintaining it, I don't mind doing
>> "mvn deploy" once in a while, but some kind of update policy should
>> probably be worked out in any case.
>
> Then have at it.  It sounds like it would be worthwhile setting up.
>

> --
> Shawn.
> --
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>

> On Tue, Nov 11, 2008 at 22:44, Shawn O. Pearce <spearce@spearce.org> wrote:
>   
>> Jonas Fonseca <jonas.fonseca@gmail.com> wrote:
>>     
>>> I would also like to have a public available maven repository for
>>> JGit. If Shawn or Robin acks, I can look into hosting one in the SVN
>>> area of the Google Code project page. Given the lack of a real release
>>> cycle it probably only makes sense to have a snapshot repository.
>>>       

>   
>> 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 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.
>   

> 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.
>

> 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.
>>
>
>

>
> 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