Hi All,

I am currently working on a project, call it A, which contains several 
sub-projects B, C, D.  The B, C, D are actually experimental input and outputs 
for simulation runs, which I need to keep track of the daily changes.  Most of 
these calculations are done on workstation, but I do need to occasionally clone 
the repositories to other machines, and then push the updates back.

I version track B, C and D with independent git repositories, and 
organisationally it makes sense for them to be subdirectories of A.  I would 
like to version control the overall project A, with B, C, D as submodules.

This is easily done on the main workstation (I will call it W1), with:

cd A
git init
for ii in B C D ; do
  git submodule ./${ii}/.git
git add .
git commit

Repository A/.git on W1 does not have an origin.  All seems to work fine with 
this step up on W1.

HOWEVER, problem starts to appear when I attempted to clone the overall 
repository A to another workstation W2:

git clone W1:<path to A on W1>/.git  <path to A on W2>
cd <path to A on W2>
git submodule init
git submodule update

git then produces an error indicating that:

W1:<path to A on W1>/.git/B/.git

is not a valid repository (i.e. directory not found)

The extra .git has been inserted in the URL to submodule repository B, C, and D.

This can be solved by changing the .gitmodules file, replacing ./B/.git to 
../B/.git,  and then git submodule sync on W2.

However, this is far from being an optimal solution, because if .gitmodules on 
W1 is updated accordingly, then the submodule repository for B would point to

<path to A on W1>/../B/.git

which will be incorrect.  I could in principle define the URL for the submodule 
repositories as absolute paths, but keeping them relative to A has many 
advantages, such as I will be able to move A around, without effecting the main 
repositories on W1 in anyway, and I can rsync them to another disk for backup 

I would be very grateful if someone can offer me an solution to my problem.

Many thanks in advance!


Lianheng Tong                                    Tel: +44 79 1758 3822  
Room S4.02, Strand Building           Fax: +44 20 7848 2420  
Department of Physics                       lianheng.t...@kcl.ac.uk
Kings College London                                  
Strand, London WC2R 2LS, U.K.                         
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