configuration/local/bin/subgit-fetch

#!/bin/sh

task="$1"
repo="$2"

set -e

if [ ! -d "$repo" ]; then
	mkdir -p "$repo"
	cd "$repo"
	git init
else
	cd "$repo"
fi

if [ ! -z "$(git status --porcelain)" ]; then
	echo "Requires a clean working tree" >&2
	exit 1
fi

# update existing submodules
git submodule foreach git fetch origin
git submodule foreach git reset --hard origin/master > /dev/null 2>&1

for remote in $(ssh git@subgit.ugent.be task students -l "$task" | cut -f4); do
	if [ -d "$(basename "$remote")" ]; then
		true # exists
	elif [ -z "$(git ls-remote "$remote")" ]; then
		echo "No branches at $remote"
	else
		echo "adding $remote"
		git submodule --quiet add --force "$remote" || true
	fi
done

git add .
git commit -v