Re: Right way to import a repo

From: Michael J Gruber <git@drmicha.warpmail.net>
Date: Dec 22, 2012, 17:57 UTC
Message-ID: <50D5F494.7060200@drmicha.warpmail.net>
In-Reply-To: <1530104.jO5zzzN8PS@horus>

Florian Lindner venit, vidit, dixit 21.12.2012 17:11:

Show 21 quoted lines

> Hello,
> 
> I have two repositories. tools and flof. I want to merge flof into tools (and 
> flof will be deleted after that) while keeping history intact. Of course I've 
> googled that and found a number of different solution which all seem to be 
> pretty komplex, so I just tried it myself. It seems to work.... are there any 
> problems with my approach?
> 
> ~/software/tools.test (git)-[master] % git remote add fl ~/flof
> 
> ~/software/tools.test (git)-[master] % git fetch fl
> warning: no common commits
> remote: Counting objects: 475, done.
> remote: Compressing objects: 100% (460/460), done.
> remote: Total 475 (delta 251), reused 0 (delta 0)
> Receiving objects: 100% (475/475), 190.40 KiB, done.
> Resolving deltas: 100% (251/251), done.
> From /home/florian/flof
>  * [new branch]      master     -> fl/master
>  * [new branch]      v2-rewrite -> fl/v2-rewrite
>

Two disjoint histories, nothing wrong with that.

Show 5 quoted lines

> /software/tools.test (git)-[master] % git checkout -b import fl/master
> Branch import set up to track remote branch master from fl.
> Switched to a new branch 'import'
> 
> Doing some mkdir und git mv for reorganisation.

Here avoid possible problems from both projects using the same root (in the filesystem/tree sense).

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> ~/software/tools.test/flof (git)-[import] % git commit -m "Reorganize flof."
> [import a00ab54] Reorganize flof.
>  152 files changed, 0 insertions(+), 0 deletions(-)
>  rename {doc => flof/doc}/common.rst (100%)
>  rename {doc => flof/doc}/conf.py (100%)
>  [...]
> 
> ~/software/tools.test/flof (git)-[import] % git checkout master
> Switched to branch 'master'
> 
> ~/software/tools.test (git)-[master] % git merge import
> Auto-merging .gitignore
> CONFLICT (add/add): Merge conflict in .gitignore
> Automatic merge failed; fix conflicts and then commit the result.
> 
> Resolving the conflict.
> 
> ~/software/tools.test (git)-[master|merge] % git add .gitignore
> 
> ~/software/tools.test (git)-[master|merge] % git commit -m "Merged flof."
> [master b8c85be] Merged flof.
> 
> ~/software/tools.test (git)-[master] % git remote rm fl
> 
> Are thery any problems with this procedure? The history seems to intact. I'm 
> quite unsure since still being a git beginner.

It works in the sense that git follows the renames (moves) you had to do prior to the merge.

Other tools like git-subtree do that history implanting in one step, by putting the added project into a subtree (rewriting the history). That way you don't have reorg commits in the history.

Michael