#! /bin/sh
# The script cannot be run with `git submodule foreach --recursive`
# because the command runs recursively from top to bottom
# while the command is required to be run from bottom to top
# because it doesn't fix childrens' gitlinks.
# So the script runs recursion itself;
# it can be run with `git submodule foreach` without `--recursive`.
set -e

START_DIR="`pwd`"
cd "`dirname \"$0\"`"
PROG_DIR="`pwd`"
cd "$START_DIR"

# To the top-level directory of the current submodule or the superproject
cd "`git rev-parse --show-toplevel`"

unset GIT_DIR

# If .git/ subdirectory is already here
[ -d .git ] && exit 0

if ! [ -f .git ]; then
    echo "Error: Cannot find gitlink, aborting" >&2
    exit 1
fi

if [ -f .gitmodules ]; then
    git submodule foreach "$PROG_DIR"/"`basename \"$0\"`"
fi

# Fix core.worktree now
git config --unset core.worktree

read _gitdir gitpath < .git
if [ "$_gitdir" != gitdir: ]; then
    echo "Error: Bad gitlink, aborting" >&2
    exit 1
fi
unset _gitdir
rm .git
exec mv "$gitpath" .git