#!/bin/sh

# Move a branch to a commit, whether or not it is checked out
#
# Usage: git point-branch-at [<branch>] <commit>

set -eu


case $# in
    1) _branch=$(git rev-parse --abbrev-ref HEAD); _commit=$1 ;;
    2) _branch=$1; _commit=$2 ;;
    *) echo "Usage: git point-branch-at [<branch>] <commit>" >&2; exit 2 ;;
esac


if [ "$_branch" = "$(git rev-parse --abbrev-ref HEAD)" ]; then
    exec git reset --keep "$_commit"
else
    exec git branch --force "$_branch" "$_commit"
fi