Re: Migrating to a new repository

----- Original Message ----
From: Ryan Schmidt <subversion-2008b_at_ryandesign.com>
To: Laker Netman <laker_netman_at_yahoo.com>
Cc: users_at_subversion.tigris.org
Sent: Friday, May 30, 2008 9:41:42 PM
Subject: Re: Migrating to a new repository

On May 30, 2008, at 08:49, Laker Netman wrote:

> Ryan Schmidt wrote:
>
>> On May 29, 2008, at 16:26, Laker Netman wrote:
>>
>>> I am preparing to migrate the contents of an existing repo to a
>>> new, empty one. I read the section in the SVN book regarding
>>> filtering repository history (w/svndumpfilter), but I don't think
>>> it does what I need.
>>>
>>> There are a large number of (easily grouped) files, of various
>>> types, that I want *copied to*, but no longer *versioned in*, the
>>> new repository. The svn:ignore property ultimately does what I
>>> want, but how I can go about moving the contents from one repo to
>>> another, making some files non-versioned in the process? Is there a
>>> method to do this to the existing repo somehow prior to moving the
>>> files? If I set the svn:ignore property to the files I no longer
>>> want versioned in the existing repo will they still copy over to
>>> the new repo (unversioned)?
>>>
>>> Ultimately, I want to keep the rev history from the existing repo,
>>> or I'd just export the files and start over.
>>
>> Ignored files are not stored in the repository. Unversioned files
>> aren't either; that's what unversioned means. So if there are files
>> you don't want in the new repository, you'll have to filter them out
>> of the old repository's dumpfile with svndumpfilter before you load
>> it into the new repository.
>
>
> Yes, thank you, I understand all of the terminology. Perhaps I
> wasn't clear enough. How do I move *all* files under version
> control in repo A to repo B where
> some files from repo A should still be version controlled and
> others not? I've been experimenting on a test repo. Once a file is
> under version control and then the ignore property is set on it,
> the property has no effect. The file remains under control of
> Subversion. svndumpfilter, from my understanding of the docs, works
> over "time", not repo structure.

>>>Can you give me an example?

Sure.

>>>As I see it, I imagine you have repo A which contains directories 1,
>>>2, and 3, and you want to migrate everything to repo B except for
>>>directory 2. Then you would svnadmin dump repo A, svndumpfilter it to
>>>exclude 2, and svnadmin load the result into repo B.

Say Repo A currently has Directory 1 which contains .TIF and .JPG files, all of which are under version control. Now I want to move Directory 1 to a new repo called B, and I only want .JPG files version controlled, but I want all of the .TIFs copied from A to B as well. Directory 1 may have subdirectories that the same rule would apply to also. All of the directories need to be moved; some of the files will remain versioned, others won't, but still need to be copied over.

I re-read svnbook Chapter 3's section on "Ignoring Unversioned Items", and I think I might have found a possible solution. Though the documentation presents the following (seemingly) contradictory information (more like a rule and an exception, I guess). Paragraph 5 says: "And it's worth noting again that, unlike the global-ignores option, the patterns found in the svn:ignore property apply only to the directory on which that property is set, and not to any of its subdirectories." Fair enough. However, the final paragraph includes this: "Subversion uses the ignore patterns—both the global and the per-directory lists [svn:ignore?]—to determine which files should not be swept into the version control system as part of a larger recursive addition or import operation." So, I guess SVN does use a the svn:ignore list set on the root of a repository when doing an initial import?

If that's the case, then I should be able to just export Repo A, create an empty Repo B, create an svn:ignore list for the repo root, then do an import? However, does this automatically create the svn:ignore property (populated with the list of items to ignore) on the subdirectories pulled in from the import (paragraph 5 suggestions it wouldn't)? I guess I could roll my own property copying tool with Perl and the "svn" command, but it seems like there should be something easier.

Laker
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Received on 2008-05-31 07:11:30 CEST