On 29.09.2005, at 18:37, Craig S. Cottingham wrote:
On Sep 29, 2005, at 11:05, David Jackman wrote:
I was of the presumption that (at least with CVS) when you do a
tag it tags the version of each file that are present on your
machine, regardless of what the latest version is on the SCM
server. I don't know for sure if the SCM plugin command is doing
it this way (since it is possible to have it tag the latest
version without regard for what's present locally), but I can't
imagine why it wouldn't.
-----Original Message-----
From: Michael Böckling [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 29, 2005 9:46 AM
To: users@maven.apache.org
Subject: SCM Tagging / Releasing
I'd like to know whether tagging with SCM is problematic with
concurrent access. Say, I want to make a release, and while SCM is
running and does its job, some developer commits a patch to the
repository. What happens?
Do I get an inconsistent state, or is that impossible (be it with
CVS or SVN)?
This information is quite important for me, and I thank everyone
in advance who knows something.
With SVN, at least, commits are atomic, so it's not possible [1]
for the repository to end up in an inconsistent state. The worst
that should happen is that the commit fails and you have to try again.
This is one of the reasons I've switched from CVS to SVN.
[1] Never say never. However, if your SVN repository ends up in an
inconsistent state, you have problems bigger than someone else
committing while you're tagging a release.
svn help copy
copy (cp): Duplicate something in working copy or repository,
remembering history.
usage: copy SRC DST
SRC and DST can each be either a working copy (WC) path or URL:
WC -> WC: copy and schedule for addition (with history)
WC -> URL: immediately commit a copy of WC to URL
URL -> WC: check out URL into WC, schedule for addition
URL -> URL: complete server-side copy; used to branch & tag
With SVN, you use copy to tag stuff (just make a copy to the tags
directory). If you chose the WC -> URL variant, you tag the contents
of you working copy, which I assume is what you want. With URL ->
URL, you'd have to make sure noone commits right before you tag,
cause then you'd tag his version.
Inconsistencies should not be possible at all using SVN.
Cheers,
-Ralph.
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