set -eu

source=$1

source_revision=$2

revision=$3

layout=$4

if test "$layout" = remote; then

port=$5

git clone --shared --bare "$source" remote

git -C remote symbolic-ref HEAD refs/heads/master

git -C remote update-ref refs/heads/master "$source_revision"

touch remote/git-daemon-export-ok

git -C remote config daemon.receivepack true

git clone --shared --no-checkout remote repo

git -C repo checkout -B master "$revision"

git -C repo remote set-url origin ../remote

git -C repo remote add daemon_origin ../remote

git -C repo fetch daemon_origin

git -C repo remote set-url daemon_origin "git://localhost:$port/remote"

set --

if test "$layout" = bare; then set -- --bare; fi

git clone --shared --no-checkout "$@" "$source" repo

git -C repo symbolic-ref HEAD refs/heads/master

git -C repo update-ref -m 'Create test branch' refs/heads/master "$revision"

if test "$layout" != bare; then git -C repo checkout --force master; fi