3b944aac3b
The target to check out does not need to be a branch. The _result_ of the checkout needs to be a branch. Don't confuse the two, and then insult the user. Insulting is ok, but I personally get really pissed off is a tool is both confused and insulting. At least be _correct_ and insulting. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
79 lines
1.7 KiB
Bash
Executable File
79 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
|
|
. git-sh-setup || die "Not a git archive"
|
|
|
|
old=$(git-rev-parse HEAD)
|
|
new=
|
|
force=
|
|
branch=
|
|
newbranch=
|
|
while [ "$#" != "0" ]; do
|
|
arg="$1"
|
|
shift
|
|
case "$arg" in
|
|
"-b")
|
|
newbranch="$1"
|
|
shift
|
|
[ -z "$newbranch" ] &&
|
|
die "git checkout: -b needs a branch name"
|
|
[ -e "$GIT_DIR/refs/heads/$newbranch" ] &&
|
|
die "git checkout: branch $newbranch already exists"
|
|
;;
|
|
"-f")
|
|
force=1
|
|
;;
|
|
*)
|
|
rev=$(git-rev-parse --verify "$arg^0" 2>/dev/null) ||
|
|
die "I don't know any '$arg'."
|
|
if [ -z "$rev" ]; then
|
|
echo "unknown flag $arg"
|
|
exit 1
|
|
fi
|
|
if [ "$new" ]; then
|
|
echo "Multiple revisions?"
|
|
exit 1
|
|
fi
|
|
new="$rev"
|
|
if [ -f "$GIT_DIR/refs/heads/$arg" ]; then
|
|
branch="$arg"
|
|
fi
|
|
;;
|
|
esac
|
|
done
|
|
[ -z "$new" ] && new=$old
|
|
|
|
#
|
|
# 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
|
|
# are switching to, then we'd better just be checking out
|
|
# what we already had
|
|
#
|
|
[ -z "$branch$newbranch" ] &&
|
|
[ "$new" != "$old" ] &&
|
|
die "git checkout: you need to specify a new branch name"
|
|
|
|
if [ "$force" ]
|
|
then
|
|
git-read-tree --reset $new &&
|
|
git-checkout-index -q -f -u -a
|
|
else
|
|
git-update-index --refresh >/dev/null
|
|
git-read-tree -m -u $old $new
|
|
fi
|
|
|
|
#
|
|
# Switch the HEAD pointer to the new branch if it we
|
|
# checked out a branch head, and remove any potential
|
|
# old MERGE_HEAD's (subsequent commits will clearly not
|
|
# be based on them, since we re-set the index)
|
|
#
|
|
if [ "$?" -eq 0 ]; then
|
|
if [ "$newbranch" ]; then
|
|
echo $new > "$GIT_DIR/refs/heads/$newbranch"
|
|
branch="$newbranch"
|
|
fi
|
|
[ "$branch" ] && ln -sf "refs/heads/$branch" "$GIT_DIR/HEAD"
|
|
rm -f "$GIT_DIR/MERGE_HEAD"
|
|
else
|
|
exit 1
|
|
fi
|