Re: [boost] [git] [modular boost] Switchover schedule proposal

Subject: Re: [boost] [git] [modular boost] Switchover schedule proposal
From: Dave Abrahams (dave_at_[hidden])
Date: 2013-10-30 00:19:14

Daniel Pfeifer <daniel_at_[hidden]> writes:

> 2013/10/29 Andrey Semashev <andrey.semashev_at_[hidden]>:
>> On Tue, Oct 29, 2013 at 4:15 PM, Daniel Pfeifer <daniel_at_[hidden]> wrote:
>>> 2013/10/29 Andrey Semashev <andrey.semashev_at_[hidden]>:
>>>> On Tue, Oct 29, 2013 at 2:36 PM, Daniel Pfeifer <daniel_at_[hidden]> wrote:
>>>>>
>>>>> About six years ago, some release tags were renamed from
>>>>> release/Version_X_XX_X to release/Boost_X_XX_X. Renaming in svn is
>>>>> performed by remove and add.
>>>>
>>>> Not quite. The added file/directory also has a property that tells
>>>> where it originated from so that it is possible to track file
>>>> moves/renames.
>>>
>>> Correct, but that does not change the point I am making: We ended up
>>> with two tags, where only one is desired.
>>
>> Doesn't Boost2Git handle moves? I.e. the old-named tags should appear
>> deleted, shouldn't they?
>
> Boost2Git does not delete branches/tags. When you delete a branch in
> svn, it still exists in the history. But when you delete a branch in
> git, it is truly gone. So we decided to keep all deleted branches.
>
> As a post-processing, we delete all merged branches, ie. the result of
> `git branch --merged`. Copied tags do not count as merged branches.

"Move between branches" is a vacuous concept in Git-land.  Therefore, it
makes sense to map both SVN branches into the same Git branch.  Then the
commit that performed the move would be empty in Git, but history would
be preserved.