+ url="$1"
+
+ if [ -e $NOGIT_DIR ]; then
+ echo "Error: .nogit already exists. Cowardly refusing to re-clone."
+ return 1
+ fi
+
+ # Clone the repository into a temporary directory
+ mkdir $NOGIT_DIR-tmp
+ cd $NOGIT_DIR-tmp
+ git clone "$url" tmp >/dev/null 2>&1
+
+ # Sanity check that we won't be overwriting any files
+ EXISTING=()
+ cd tmp
+ for file in $(find . -mindepth 1 -a -path ./.git -prune -o -print); do
+ if [ -e "../../$file" ]; then
+ EXISTING+=($(echo "$file" | sed -s 's,^\./,,'))
+ fi
+ done
+ cd ..
+
+ if [ ${#EXISTING[@]} -gt 0 ]; then
+ echo "Error: The following existing files would be overwritten:" >&2
+ echo "" >&2
+ for file in ${EXISTING[@]}; do
+ echo " $file" >&2
+ done
+ echo "" >&2
+ echo "Cowardly refusing to clone" >&2
+ cd ..
+ rm -rf $NOGIT_DIR-tmp
+ false
+ fi
+
+ # Now that we've passed the sanity check, install the cloned .git
+ # object store into $NOGIT_DIR, cleanup our temporary files, and
+ # checkout the (known to not be conflicting) files.
+ mv tmp/.git ../$NOGIT_DIR
+ cd ..
+ rm -rf $NOGIT_DIR-tmp
+ GIT_DIR=$NOGIT_DIR git reset --hard >/dev/null 2>&1
+
+ echo "Completed nogit clone of $url"