On Wed, May 18, 2011 at 3:22 PM, Eric Firing <efir...@hawaii.edu> wrote:
> On 05/18/2011 08:47 AM, Benjamin Root wrote:
>>
>>
>> On Tue, May 17, 2011 at 9:07 PM, Gerald Storer <g...@mrxtech.com.au
>> <mailto:g...@mrxtech.com.au>> wrote:
>>
>>     On 18/05/2011 5:14 AM, Eric Firing wrote:
>>      > 3) We don't have to always push sets of changes from an original pull
>>      > request to upstream; they can be consolidated using any of a
>>     variety of
>>      > methods to form a new local feature branch with the same net
>>     effect but
>>      > fewer commits (maybe only one), and then that can be merged (which
>>      > should be fast-forward, no merge commit) and pushed to upstream.
>>       This
>>      > takes a little more work than simply accepting (merging) a pull
>>     request
>>      > as-is, but in many cases it may be worth it because it can yield a
>>      > cleaner history.  Similarly, if someone is developing a feature
>>     branch
>>      > on github, and the net effect is correct but the branch has
>>     intermediate
>>      > commits that distract from the net result, then a good practice
>>     would be
>>      > for that person to consolidate the changes into a new feature branch
>>      > with a cleaner history, close the pull request on the old one and
>>     open a
>>      > new request for the polished branch.
>>      >
>>     I believe this script more or less automates the process:
>>     https://github.com/jeresig/pulley
>>
>>     Gerald.
>>
>>
>> Don't know if this was a mistake or not, but I see that commit e7f1e83
>> (the one to fix a clipping issue when a patch's line width is 1 but
>> there is no color) seems to have been merged back into itself...
>> somehow... in commit 0c886b8.  I have seen things like this before, and
>> I never quite understood how they happen.  Plus, do we want to get that
>> patch merged down to master?
>
> Yes, it needs to get merged to master; but no, I don't think anything
> was "merged back into itself"; instead, it is just a case where a
> fast-forward with no merge commit would have left a simpler history--one
> commit instead of two.
>
> Merging from v1.0.x to master doesn't have to be done after every change
> to v1.0.x, but it shouldn't be left undone for very long.  A few days
> ago I wasted a chunk of time thrashing around on master because of a bug
> that had been fixed on 1.0.x but was not yet merged into master--and I
> had not thought to check their relative states.  The bug had actually
> been introduced to master via a recent change merged from 1.0.x.
>
> We are experiencing some bumps on the git/github learning curve, but not
> nearly enough to make me pine for svn.
>
>>
>> I think we definitely need to see what sort of controls we can put in
>> place to prevent mix-ups in the future.  One thing I did like about SVN
>> was that it was next to impossible to change the history.  Meanwhile,
>> with git, it becomes possible.  Is there some way we can disallow forced
>> pushes, maybe?  Just a thought...
>>
>
> I suspect the anomalies have not resulted from forced pushes, but from
> local pulls and merges followed by innocuous pushes.  So the key is
> understanding how to ensure one's local branches have the desired
> history before pushing to github.  (And making sure one is pushing from
> the correct source to the correct destination.  Trying first with
> --dry-run can help.)

Before pushing, I also recommend inspecting the history graph, either
with "gitk --all" or "git log --oneline --graph --all". I try to
remember to make sure the history graph looks the way I expect it
should before I push anywhere.

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