Perhaps having a file named something like:

.git_foreign_scm_empty_dir  or some shorter name.

With the contents of the fast importer empty directory info put in there; If 
any book keeping is needed.

It also looks like you strip out meta-data.
perhaps a file like:

.git_foreign_scm_metadata

We could use the .git/config file format for storing the bookkeeping data.

Steve

On Jul 14, 2012, at 3:46 PM, David Aguilar wrote:

> On Sat, Jul 14, 2012 at 7:41 AM, Felix Natter <fnat...@gmx.net> wrote:
>> hello,
>> 
>> when converting a repo from bzr to git:
>> 
>> mkdir freeplane-git1
>> cd freeplane-git1
>> git init .
>> bzr fast-export --plain --export-marks=../marks.bzr ../trunk/ | git 
>> fast-import --export-marks=../marks.git
>> git checkout
>> 
>> Empty directories are not contained in the git working index. This is
>> because of the --plain option, which "Excludes metadata to maximise
>> interoperability" and thus does not support empty directories
>> (http://doc.bazaar.canonical.com/plugins/en/fastimport-plugin.html).
>> 
>> However, when I use "--no-plain" (which according to above documentation
>> exports empty directories), git cannot handle it:
>> 
>> $ ./freeplane2git.sh
>> Initialized empty Git repository in /home/felix/git/freeplane-git1/.git/
>> 15:56:09 Calculating the revisions to include ...
>> 15:56:09 Starting export of 4290 revisions ...
>> fatal: This version of fast-import does not support feature 
>> commit-properties.
>> fast-import: dumping crash report to .git/fast_import_crash_3915
>> bzr: broken pipe
>> 
>> I already tried to hack bzr-fastimport's exporter.py so that it does not
>> emit commit properties but emits empty directories but i was not
>> successful.
>> 
>> So is there another way to preserve empty directories or shall I report
>> a bug on bzr fast-export?
>> 
>> Many thanks in advance!
> 
> I would suggest hacking it to optionally not emit commit properties as step 
> one.
> 
> A later enhancement would be to optionally create directories with
> empty .gitignore files, or something similar. git really doesn't care
> about empty directories.
> -- 
> David
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