@rem Project folder r:\testproject, feel free to change the drive letter if necessary
r:
md testproject
cd testproject

@rem initialize repo
cmd /c git init

@rem create dummy file as super project
ECHO This is the super project > main1.txt

cmd /c git add main1.txt
cmd /c git commit -m "Initial commit for the Super Project"

@rem add a second line to main1.txt to verify git diff is working before adding submodule
ECHO add the second line >> main1.txt

cmd /c git status 
cmd /c git diff --cached
cmd /c git diff
cmd /c git diff HEAD

@rem no problem found up to this point.
@rem all three git diff command complete succefully

@rem set submodule, use cakephp as submodule
cmd /c git submodule add git://github.com/cakephp/cakephp.git

@rem git diff --cached still works properly after adding the submodule
cmd /c git diff --cached

@rem the next two lines will crash my command prompt when execute
cmd /c git diff
cmd /c git HEAD