mirror of
https://github.com/git/git
synced 2024-07-17 11:07:55 +00:00
ae2b0f1518
Now all the users of this script detect its exit status and die, complaining that it is outside git repository. So move the code that dies from all callers to git-sh-setup script. Signed-off-by: Junio C Hamano <junkio@cox.net>
139 lines
3.2 KiB
Bash
Executable file
139 lines
3.2 KiB
Bash
Executable file
#!/bin/sh
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. git-sh-setup
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usage () {
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die "usage: git checkout [-f] [-b <new_branch>] [<branch>] [<paths>...]"
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}
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old=$(git-rev-parse HEAD)
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new=
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force=
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branch=
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newbranch=
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while [ "$#" != "0" ]; do
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arg="$1"
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shift
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case "$arg" in
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"-b")
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newbranch="$1"
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shift
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[ -z "$newbranch" ] &&
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die "git checkout: -b needs a branch name"
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[ -e "$GIT_DIR/refs/heads/$newbranch" ] &&
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die "git checkout: branch $newbranch already exists"
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git-check-ref-format "heads/$newbranch" ||
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die "we do not like '$newbranch' as a branch name."
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;;
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"-f")
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force=1
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;;
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--)
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break
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;;
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-*)
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usage
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;;
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*)
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if rev=$(git-rev-parse --verify "$arg^0" 2>/dev/null)
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then
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if [ -z "$rev" ]; then
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echo "unknown flag $arg"
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exit 1
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fi
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new="$rev"
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if [ -f "$GIT_DIR/refs/heads/$arg" ]; then
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branch="$arg"
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fi
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elif rev=$(git-rev-parse --verify "$arg^{tree}" 2>/dev/null)
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then
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# checking out selected paths from a tree-ish.
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new="$rev"
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branch=
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else
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new=
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branch=
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set x "$arg" "$@"
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shift
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fi
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break
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;;
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esac
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done
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# The behaviour of the command with and without explicit path
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# parameters is quite different.
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#
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# Without paths, we are checking out everything in the work tree,
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# possibly switching branches. This is the traditional behaviour.
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#
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# With paths, we are _never_ switching branch, but checking out
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# the named paths from either index (when no rev is given),
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# or the named tree-ish (when rev is given).
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if test "$#" -ge 1
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then
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if test '' != "$newbranch$force"
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then
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die "updating paths and switching branches or forcing are incompatible."
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fi
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if test '' != "$new"
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then
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# from a specific tree-ish; note that this is for
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# rescuing paths and is never meant to remove what
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# is not in the named tree-ish.
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git-ls-tree -r "$new" "$@" |
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git-update-index --index-info || exit $?
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fi
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git-checkout-index -f -u -- "$@"
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exit $?
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else
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# Make sure we did not fall back on $arg^{tree} codepath
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# since we are not checking out from an arbitrary tree-ish,
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# but switching branches.
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if test '' != "$new"
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then
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git-rev-parse --verify "$new^{commit}" >/dev/null 2>&1 ||
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die "Cannot switch branch to a non-commit."
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fi
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fi
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[ -z "$new" ] && new=$old
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# If we don't have an old branch that we're switching to,
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# and we don't have a new branch name for the target we
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# are switching to, then we'd better just be checking out
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# what we already had
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[ -z "$branch$newbranch" ] &&
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[ "$new" != "$old" ] &&
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die "git checkout: you need to specify a new branch name"
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if [ "$force" ]
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then
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git-read-tree --reset $new &&
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git-checkout-index -q -f -u -a
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else
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git-update-index --refresh >/dev/null
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git-read-tree -m -u $old $new
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fi
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#
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# Switch the HEAD pointer to the new branch if it we
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# checked out a branch head, and remove any potential
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# old MERGE_HEAD's (subsequent commits will clearly not
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# be based on them, since we re-set the index)
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#
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if [ "$?" -eq 0 ]; then
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if [ "$newbranch" ]; then
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leading=`expr "refs/heads/$newbranch" : '\(.*\)/'` &&
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mkdir -p "$GIT_DIR/$leading" &&
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echo $new >"$GIT_DIR/refs/heads/$newbranch" || exit
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branch="$newbranch"
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fi
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[ "$branch" ] &&
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GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD "refs/heads/$branch"
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rm -f "$GIT_DIR/MERGE_HEAD"
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else
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exit 1
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fi
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