threads / discuss / 11774

lost history with directory move?

Subject: lost history with directory move?

## tl;dr

2 messages between Jan 29, 2008 and Jan 29, 2008.

replies: 1people: 2as markdown or json

Perrin Meyer· Jan 29, 2008, 01:22 UTC · lore
I'm confused about history and directory renaming. Where did my history go? 
I have a git repo with a doc/ directory, which I renamed to Documentation/ 

$ mv doc/ Documentation/ $ git commit -a where I see a lot of deletes $ git push

$ git add Documentation/ $ git commit -a and I see that a all my doc files added, as expected. $ git push

But when I got to look at the history of the Documentation/ directory
$ git log Documentation/
I only see one commit message 
even if I do a 
$ git log --follow Documentation/
I don't see my history.
Even if I try a single file
$ git log --follow README
I only see the single rename commit, not any history. 
What did I do wrong?  
I'm guessing, in hindsight, that I probably should have done

$ mv doc/ Documentation/ $ git add Documentation/ $ git commit -a

but is there anyway to get my history back given what I have done? 
Thanks for the help.  I'm using git version 1.5.3.8 
Perrin Meyer 
Shawn O. Pearce· Jan 29, 2008, 02:21 UTC · re: Perrin Meyer · lore

Re: lost history with directory move?

Perrin Meyer <perrinmeyer@yahoo.com> wrote:
Show 15 quoted lines
> $ mv doc/ Documentation/
> $ git commit -a 
> where I see a lot of deletes
> 
> $ git add Documentation/
> $ git commit -a
> and I see that a all my doc files added, as expected. 
> 
> But when I got to look at the history of the Documentation/ directory
> 
> $ git log Documentation/
> 
> I only see one commit message 
> 
> $ git log --follow Documentation/
--follow only works on a single file.  So you cannot use
it for an entire directory.
 
> $ git log --follow README
> 
> I only see the single rename commit, not any history. 
Right, because the file came into existance in that commit and we
cannot find any deleted path in that same commit that is "highly
similar" to the file now called Documentation/README.  So we don't
call it a rename.
 
Show 5 quoted lines
> I'm guessing, in hindsight, that I probably should have done
> 
> $ mv doc/ Documentation/
> $ git add Documentation/
> $ git commit -a 
Correct.  Rename detection works by looking for an add/delete pair
_in the same commit_ that have file content that is higly similar
between the two paths.  You broke that by doing the two changes in
two different commits.
 
> but is there anyway to get my history back given what I have done? 

I can't think of one other than to squash the two commits together with a tool like `git rebase -i` and then force push it back to your upstream repository. Note that doing this would change the commit SHA-1 names so anyone who has built on top of these changes would also need to rebase their changes.

-- 
Shawn.

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