Git Submodule Depth-First Stuff

for dir in a b c d; do
    git init $dir
    pushd $dir
        touch test
        echo $dir > bob
        git add -A
        git commit -m "Init"
    popd
done

pushd b;
    git submodule add ../c
    git commit -m "Subbed"
popd

git-sfed () { git submodule foreach "git submodule foreach '$*' && $*"; }

pushd a;
    git submodule add ../b
    git submodule add ../d
    git submodule update --init --recursive
    # Three different methods for iteration
    echo
    git-sfed 'echo $path; git status'
    echo
    git submodule  foreach --recursive | tac | sed 's/Entering//' | xargs -I% bash -c 'cd %; echo %; git status'
    echo
    git submodule foreach --recursive | tac | sed 's/Entering //' | xargs -n 1 bash -c 'cd $1; echo $1; git status' _
    echo
popd

echo > /dev/null <<COMMENT
Entering 'b'
Entering 'c'
c
# Not currently on any branch.
nothing to commit (working directory clean)
b
# On branch master
nothing to commit (working directory clean)
Entering 'd'
d
# On branch master
nothing to commit (working directory clean)

d
# On branch master
nothing to commit (working directory clean)
b/c
# Not currently on any branch.
nothing to commit (working directory clean)
b
# On branch master
nothing to commit (working directory clean)

d
# On branch master
nothing to commit (working directory clean)
b/c
# Not currently on any branch.
nothing to commit (working directory clean)
b
# On branch master
nothing to commit (working directory clean)
COMMENT