From: Marco Costalba <mcostalba@gmail.com>
Date: Thu, 28 Aug 2008 18:54:44 GMT
Subject: Re: [QGIT RFC] Unit tests for QGit
Message-ID: <e5bfff550808281154h67392297y3a08d4ed8aea408f@mail.gmail.com>
In-Reply-To: <20080828153118.GA13169@diana.vm.bytemark.co.uk>

On Thu, Aug 28, 2008 at 5:31 PM, Karl Hasselström <kha@treskal.com> wrote:
>
> StGit has no per-repo data. It's all per-branch. "stg init" operates
> on the current branch, not the whole repo.
>

Ok. Thanks. In this case the check qgit does is broken, and I think
not only that because I never had this point clear while developing
the interface.

>
> Hmm. For me, "stg branch" succeeds even if "stg init" has not yet been
> run (which is arguably as it should be, since it doesn't require that
> stg init has been run in the current branch). "stg series" or
> something is probably better for this purpose.
>

But if I run 'stg branch' in a git-only repo this gives an error. This
conditions, at least until now, has always been working for me.


> Though if you're concerned about speed (as the comment indicates), you
> should probably do something cheaper than running stg, such as
> checking if .git/patches/<branchname> exists.
>

Actually the actual code chunk is:

        // check for a StGIT stack
         QDir d = gitDir;

         if (d.exists("patches")) { // early skip

                 isStGIT = run("stg branch", &stgCurBranch); // slow command

                 stgCurBranch = stgCurBranch.trimmed();
         } else
                 isStGIT = false;



Indeed I need the Stgit current branch name to filter out the refs
found with a following "git show-ref -d" command:

The code chunk is actually

// run the command and save output in runOutpt
if (!run("git show-ref -d", &runOutput))
       return false;

QStringList refsList = runOutput.split('\n', QString::SkipEmptyParts);

FOREACH_SL (it, refsList) {

      QString revSha = (*it).left(40);
      QString refName = (*it).mid(41);

      // save StGIT patch sha, to be used later
      if (refName.startsWith("refs/patches/" + stgCurBranch + "/")) {

              .... we have found a reference to a StGit patch of
current branch ...
      }

......

}



>> So it's not very clear to me what does it mean "switching from
>> non-stgit branch to a stgit one"
>
> Switching from a branch where "stg init" hasn't been run, to one where
> it has.
>

Thanks again. I don't know why but I was somehow sticked to the idea
that 'stg init' was behaving similar to 'git init', i.e. you need to
run it only once per repo.

Marco