do
printf "start\ncreate refs/heads/%d PRE\ncommit\n" $i &&
printf "start\nupdate refs/heads/%d POST PRE\ncommit\n" $i &&
- printf "start\ndelete refs/heads/%d POST\ncommit\n" $i
+ printf "start\ndelete refs/heads/%d POST\ncommit\n" $i || return 1
done >instructions
'
do
git update-ref refs/heads/branch PRE &&
git update-ref refs/heads/branch POST PRE &&
- git update-ref -d refs/heads/branch
+ git update-ref -d refs/heads/branch || return 1
done
'