# GIT-SVN: Corrupted commits when using --preserve-empty-dirs

2 messages from 2012-09-04 to 2012-09-06. Participants: Mark Plomer.
Thread: https://gitlist.dev/t/31426

## Mark Plomer, 2012-09-04 13:11

Subject: GIT-SVN: Corrupted commits when using --preserve-empty-dirs
Message-ID: <2086BD14B0971B4492C5AA17E9604CB02173C9C1@AMSPRD0610MB350.eurprd06.prod.outlook.com>
URL: https://gitlist.dev/e/2086BD14B0971B4492C5AA17E9604CB02173C9C1%40AMSPRD0610MB350.eurprd06.prod.outlook.com

```
Hi,
if I clone a SVN repository with --preserve-empty-dirs it terminates at some point with i.e. following error:
folder/subfolder was not found in commit 2dcb008c220f5f6fe33700c9e7deb0c8fa2b8607 (r4)

I tracked things down to the following problem:
- r1: Create a directory with subdirectory with a file
- r2: Remove the file (so it generates a virtual .gitignore)
- r3: Rename subdirectory
- r4: Add a symlink named like the old subdirectory

-> In GIT the symlink is actually not a symlink but a folder with the ".gitignore" file ... which break things later when changing symlink


# Simple reproduce script:
svnadmin create test-svn-repo
svn co file://`pwd`/test-svn-repo test-svn-wc

mkdir -p test-svn-wc/folder/subfolder
touch test-svn-wc/folder/subfolder/file.txt
svn add test-svn-wc/*
svn ci -m 'Initial commit' test-svn-wc

svn rm test-svn-wc/folder/subfolder/file.txt
svn ci -m 'Removed file.txt' test-svn-wc

svn up test-svn-wc
svn mv test-svn-wc/folder/subfolder test-svn-wc/folder/subfolder2
svn ci -m 'Renamed subfolder' test-svn-wc

svn up test-svn-wc
ln -s subfolder2 test-svn-wc/folder/subfolder
svn add test-svn-wc/folder/subfolder
svn ci -m 'Added subfolder symlink' test-svn-wc

rm -f test-svn-wc/folder/subfolder
ln -s changedlink test-svn-wc/folder/subfolder
svn ci -m 'Changed symlink' test-svn-wc


git svn clone --preserve-empty-dirs file://`pwd`/test-svn-repo test-git
# this throws error: folder/subfolder was not found in commit 2dcb008c220f5f6fe33700c9e7deb0c8fa2b8607 (r4)


Tested with git 1.7.12, svn 1.6.12 (debian)

Greets Mark

```

## Mark Plomer, 2012-09-06 21:02

Subject: Re: GIT-SVN: Corrupted commits when using --preserve-empty-dirs
Message-ID: <50490F50.3020208@boerse-go.de>
URL: https://gitlist.dev/e/50490F50.3020208%40boerse-go.de
In-Reply-To: <2086BD14B0971B4492C5AA17E9604CB02173C9C1@AMSPRD0610MB350.eurprd06.prod.outlook.com>

```
There is a strange workaround for SVN-repos, containing directories that 
were replaced by symlinks in the past, properly cloned into GIT (with 
empty dirs):

You have to import it part-by-part ... i.e. fetch revision 1-3 and then 
fetch 4-5:

git svn clone -r 1:3 --preserve-empty-dirs file://`pwd`/test-svn-repo 
test-git
cd test-git
git svn fetch
# This works fine for the example below

The disadvantage is, that you have to figure out those critical 
revisions manually. Otherwise you may have an inconsistent clone.

Am 04.09.2012 15:11, schrieb Mark Plomer:
> Hi,
> if I clone a SVN repository with --preserve-empty-dirs it terminates at some point with i.e. following error:
> folder/subfolder was not found in commit 2dcb008c220f5f6fe33700c9e7deb0c8fa2b8607 (r4)
>
> I tracked things down to the following problem:
> - r1: Create a directory with subdirectory with a file
> - r2: Remove the file (so it generates a virtual .gitignore)
> - r3: Rename subdirectory
> - r4: Add a symlink named like the old subdirectory
>
> -> In GIT the symlink is actually not a symlink but a folder with the ".gitignore" file ... which break things later when changing symlink
>
>
> # Simple reproduce script:
> svnadmin create test-svn-repo
> svn co file://`pwd`/test-svn-repo test-svn-wc
>
> mkdir -p test-svn-wc/folder/subfolder
> touch test-svn-wc/folder/subfolder/file.txt
> svn add test-svn-wc/*
> svn ci -m 'Initial commit' test-svn-wc
>
> svn rm test-svn-wc/folder/subfolder/file.txt
> svn ci -m 'Removed file.txt' test-svn-wc
>
> svn up test-svn-wc
> svn mv test-svn-wc/folder/subfolder test-svn-wc/folder/subfolder2
> svn ci -m 'Renamed subfolder' test-svn-wc
>
> svn up test-svn-wc
> ln -s subfolder2 test-svn-wc/folder/subfolder
> svn add test-svn-wc/folder/subfolder
> svn ci -m 'Added subfolder symlink' test-svn-wc
>
> rm -f test-svn-wc/folder/subfolder
> ln -s changedlink test-svn-wc/folder/subfolder
> svn ci -m 'Changed symlink' test-svn-wc
>
>
> git svn clone --preserve-empty-dirs file://`pwd`/test-svn-repo test-git
> # this throws error: folder/subfolder was not found in commit 2dcb008c220f5f6fe33700c9e7deb0c8fa2b8607 (r4)
>
>
> Tested with git 1.7.12, svn 1.6.12 (debian)
>
> Greets Mark

```