Bug with git-submodule and IFS

Hi there,

I ran into an interesting bug with git submodules today.  It appears that if your IFS is not set to what git-submodule expects it to be (i.e. the standard IFS), it will break in a fun way.

Example:

$ git init
Initialized empty Git repository in /home/adranse/test/.git/
$ git submodule add github:/repos/perf
Cloning into 'perf'...
remote: Counting objects: 5744, done.
remote: Compressing objects: 100% (4627/4627), done.
remote: Total 5744 (delta 2400), reused 1579 (delta 343)
Receiving objects: 100% (5744/5744), 28.78 MiB | 4.56 MiB/s, done.
Resolving deltas: 100% (2400/2400), done.
$ export IFS="

"

$ git submodule update --init --recursive
No submodule mapping found in .gitmodules for path ''
$ unset IFS
$ git submodule update --init --recursive
Submodule 'perf' () registered for path 'perf'

As a solution, I would suggest setting IFS to the expected value before calling the git-submodule shell script.

Thanks,

Andrew Dranse
OANDA Corporation
adranse@oanda.com