. git-sh-setup
old=$(git-rev-parse HEAD)
+old_name=HEAD
new=
+new_name=
force=
branch=
newbranch=
+newbranch_log=
merge=
while [ "$#" != "0" ]; do
arg="$1"
[ -e "$GIT_DIR/refs/heads/$newbranch" ] &&
die "git checkout: branch $newbranch already exists"
git-check-ref-format "heads/$newbranch" ||
- die "we do not like '$newbranch' as a branch name."
+ die "git checkout: we do not like '$newbranch' as a branch name."
+ ;;
+ "-l")
+ newbranch_log=1
;;
"-f")
force=1
exit 1
fi
new="$rev"
+ new_name="$arg^0"
if [ -f "$GIT_DIR/refs/heads/$arg" ]; then
branch="$arg"
fi
then
# checking out selected paths from a tree-ish.
new="$rev"
+ new_name="$arg^{tree}"
branch=
else
new=
+ new_name=
branch=
set x "$arg" "$@"
shift
if test "$#" -ge 1
then
+ hint=
+ if test "$#" -eq 1
+ then
+ hint="
+Did you intend to checkout '$@' which can not be resolved as commit?"
+ fi
if test '' != "$newbranch$force$merge"
then
- die "updating paths and switching branches or forcing are incompatible."
+ die "git checkout: updating paths is incompatible with switching branches/forcing$hint"
fi
if test '' != "$new"
then
cd "$cdup"
fi
-[ -z "$new" ] && new=$old
+[ -z "$new" ] && new=$old && new_name="$old_name"
# If we don't have an old branch that we're switching to,
# and we don't have a new branch name for the target we
[ -z "$branch$newbranch" ] &&
[ "$new" != "$old" ] &&
- die "git checkout: you need to specify a new branch name"
+ die "git checkout: to checkout the requested commit you need to specify
+ a name for a new branch which is created and switched to"
if [ "$force" ]
then
work=`git write-tree` &&
git read-tree --reset $new &&
git checkout-index -f -u -q -a &&
- git read-tree -m -u $old $new $work || exit
+ git read-tree -m -u --aggressive $old $new $work || exit
if result=`git write-tree 2>/dev/null`
then
exit 0
)
saved_err=$?
- git diff-files --name-status
+ if test "$saved_err" = 0
+ then
+ test "$new" = "$old" || git diff-index --name-status "$new"
+ fi
(exit $saved_err)
fi
#
if [ "$?" -eq 0 ]; then
if [ "$newbranch" ]; then
- leading=`expr "refs/heads/$newbranch" : '\(.*\)/'` &&
- mkdir -p "$GIT_DIR/$leading" &&
- echo $new >"$GIT_DIR/refs/heads/$newbranch" || exit
+ if [ "$newbranch_log" ]; then
+ mkdir -p $(dirname "$GIT_DIR/logs/refs/heads/$newbranch")
+ touch "$GIT_DIR/logs/refs/heads/$newbranch"
+ fi
+ git-update-ref -m "checkout: Created from $new_name" "refs/heads/$newbranch" $new || exit
branch="$newbranch"
fi
[ "$branch" ] &&