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Re: Extract of irc log 'the rsync issue'

From: <kfogel_at_collab.net>
Date: 2001-10-12 19:32:41 CEST

Great suggestion, Branko! This is going to easier than I claimed,
then, and Greg Hudson will be able to use Subversion for real work.

Volunteers? :)

-k

Branko =?ISO-8859-2?Q?=C8ibej?= <brane@xbc.nu> writes:
> Greg Hudson wrote:
>
> >We've also had bad experiences with developers keeping working
> >directories on local disk. One co-worker lost three months of effort
> >when his workstation's hard disk crashed. His project was never
> >completed.
> >
>
> I have no sympathy at all. He should have a) committed daily, and b) had
> his machine backed up.
>
>
>
> Back to the topic: There is a way to empty ./svn/text-base *and* not
> have too much extra network traffic.
>
> 1) Write-protect (unmodified) WC files on checkout/update.
> Yes, this isn't 100% safe; but a determined (l)user can go and delete
> the files in the text base today.
>
> 2) At checkout time, write an MD5 and SHA1 hash of the pristine file
> into ./svn/entries, along with the timestamp.
> These hashes would be used instead of the pristine copy to determine if
> the file has changed locally. Two different hashes, to make it less
> probable that changes go undetected.
>
> 3) Provide a new command, "svn modify":
>
> 1. If the WC file hasn't changed since the last update, copy it to
> text-base . After that, commits and local mods will work as usual.
> 2. If the WC file *has* changed, and the pristine copy isn't
> available,, fetch the pristine text from the server.
> 3. Make the WC file writable
>
>
> 4) "svn up" should do the check under 2. above. Same for diff, etc.
>
> 5) "svn ci" should write-protect the file, update the hashes and clean
> out text-base.
>
> 6) "svn revert" should undo "svn modify"
>
>
> Yes, it's not trivial, but it's straight-forward. The nice thing is
> that, in most cases and with well-behaved users, "svn mod" will be a
> local operation (unlike "cvs edit").
>
> Another nice point is that we could actually recover from the case where
> the pristine copy is deleted by mistake. Today, that would totally hose
> the WC.
>
> (And my pet project: we could hook reserved checkouts on "svn mod".)
>
>
> --
> Brane �ibej <brane_at_xbc.nu> http://www.xbc.nu/brane/
>
>
>
>
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Received on Sat Oct 21 14:36:44 2006

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