Importing Subversion to GIT: problem with subpaths

We currently run a big subversion repository, and I'm trying to move it to GIT. The problem is that it uses trunks and tags below the root directory. For example:

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MyDepartment\MyOS\Project1\trunk\              <-- master branch
MyDepartment\MyOS\Project1\branch\v1           <-- other branch
MyDepartment\MyOS\Project1\tags\v1_20100101    <-- release tag

There are different departments, OS's, and many different projects.

So when I clone the SVN repository using --stdlayout:

git svn clone --stdlayout http://svn-repository/

The clone ends up empty. Without the option, I get a clone, but then branches are treated as directories on the master branch.

1. Is there a way to import this directory structure in one go?
2. If I write a script to import all the Projects separately, is there a way to combine the per-project GIT imports into one big GIT repository?

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If I understande the question correctly, you want:

git svn clone 
    --trunk=MyDepartment\MyOS\Project1\trunk 
    --tags=MyDepartment\MyOS\Project1\tags 
    --branches=MyDepartment\MyOS\Project1\branch 
    http://svn-repository/

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Update: you can include more then one --branches and --tags:

git svn clone 
    --trunk=MyDepartment\MyOS\Project1\trunk 
    --tags=MyDepartment\MyOS\Project1\tags 
    --tags=MyDepartment\MyOS\Project2\tags 
    --tags=OtherDepatment\MyOS\Project1\tags 
    --branches=MyDepartment\MyOS\Project1\branch 
    --branches=MyDepartment\MyOS\Project2\branch 
    --branches=OtherDepartment\MyOS\Project1\branch 
    http://svn-repository/

You cannot have more the one trunk evidently.

Git is really designed to support one project per one repository and not multiple projects in one repo. I suppose you will hit many problems trying to use it like that.

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Look into Git submodules. You'll probably have to import each of your subprojects separately, but the result may mirror your current usage a little better.