From: J. Longman <longman@xiplink.com>
Date: Wed, 29 Oct 2008 23:49:47 GMT
Subject: Re: jgit as a jira plugin
Message-ID: <D7D18CE8-BDBD-430A-BCB6-D1BEFD21C949@xiplink.com>
In-Reply-To: <20081029230816.GA31926@spearce.org>


On 29-Oct-08, at 7:08 PM, Shawn O. Pearce wrote:
> "J. Longman" <longman@xiplink.com> wrote:
>> 2) I'd like to find out the jgit way to achieve the equivalent of  
>> 'svn
>> update'.  I understand that fetch can do this but being new to git, I
>> don't really understand quite what I need yet.  The goal is to have  
>> git
>> the latest commits from the origin before indexing.
> Use a Transport instance to execute a default fetch (no args) on say
> the "remote" origin.  That will download the objects to the local
> database, but it won't update a working directory.  But I'm not sure
> you would care about the working directory in the backend of Jira.

Basically I stole the pgm.Fetch code:

Transport tn = Transport.open(repository, "origin");
final FetchResult r;
List<RefSpec> toget = new ArrayList<RefSpec>();
try {
	r = tn.fetch(new TextProgressMonitor(), toget);
} finally {
	tn.close();
}

Can I assume that this enough to update the database?  If so I think  
I'm doing what you're suggesting.  After this (and not shown) is some  
logging code taken from Fetch, which results in the following:

 From /Users/longman/workspace2/work/../masterRepo/
     131dcf5..078d43f  master     -> origin/master

but there doesn't appear to be any specific mention of the incoming  
changes.

>> Thanks for jgit - it took me a day or two to wrap my head around  
>> getting
>> the list of files changed in a commit but otherwise its great to have
>> something that can be integrated into jira.
> Yea, about that, we wanted to write more tutorials on the API...  ;-)


Well, the egit does provide some examples, just there's another API  
involved which can be confusing.  The code in the jira git plugin the  
key classes are GitManagerImpl and RevisionIndexer, but the  
RevisionIndexer has some Lucene (text search engine) API mixed-in.  
Plus I'm still even learning about git much less the jgit api so I  
can't vouch for quality or correctness ;-).  I could snip some code  
out and send it to you off-list for inclusion in the wiki maybe.

later, j

--
J. Longman
longman@xiplink.com

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