Petr Baudis:
On Mon, Mar 22, 2010 at 08:59:40AM +0100, Thomas Koch wrote:
In all three cases you're free to either keep or throw away the old
patchset.
Yes, but to the same degree e.g. with StGIT I'm free to keep the head of
the old patch series. That does not mean the operation *preserves* the
history, only that the history is still around somewhere in the
repository, however it won't be around in other incarnations of the
repository and it will not be connected in any way to the current
version of the patchset.
Yes, if you are lucky you can figure out the name of the previous
version, but it's like starting development of each new kernel version
by a clean import of the sources.
Hi Petr,
let me copy the list of methods from my last mail:
1) checkout new patch branches from the top of the old patch branches and
merge upstream into each of them
2) recreate (like rebase) the full history of the patch branches on top of the
new upstream
3) collapse the branch history and create one commit per patch branch on top
of the new upstream
From these methods, 3) loses all history, 2) loses some history but preserves
the individual history of one patch branch on a new base and 1) preserves all
history. Let me give an example for method 1).
You've got a patchset identified by the prefix debian/. Now you want to
package a new upstream but need to retain the old patchset in case of security
updates in Debian stable. Debian stable has version 0.1, new upstream is 0.2.
So you
- rename the old patchset from debian/ to debian-0.1/
- clone/copy/recreate (pick a name) a new patchset debian/ on top of
upstream/0.2. This is done by merging upstream/0.2 into each debian/* branch.
- Once you don't maintain version 0.1 anymore, you can delete the debian-0.1/*
branches
After these steps, the debian/ branch still contains pointers to all commits
from the debian-0.1/* branches.
It's an additional question, how to deal with commits that are done in
debian-0.1/* after the new upstream merge.
Best regards,
Thomas Koch, http://www.koch.ro
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