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executable file 106 lines (86 sloc) 2.402 kb
#!/bin/sh
usage () {
echo "usage:" $@
exit 127
}
die () {
echo $@
exit 128
}
failed () {
die "unable to create new workdir '$new_workdir'!"
}
if test $# -lt 2 || test $# -gt 3
then
usage "$0 <repository> <new_workdir> [<branch>]"
fi
orig_git=$1
new_workdir=$2
branch=$3
# want to make sure that what is pointed to has a .git directory ...
git_dir=$(cd "$orig_git" 2>/dev/null &&
git rev-parse --git-dir 2>/dev/null) ||
die "Not a git repository: \"$orig_git\""
case "$git_dir" in
.git)
git_dir="$orig_git/.git"
;;
.)
git_dir=$orig_git
;;
esac
# don't link to a configured bare repository
isbare=$(git --git-dir="$git_dir" config --bool --get core.bare)
if test ztrue = "z$isbare"
then
die "\"$git_dir\" has core.bare set to true," \
" remove from \"$git_dir/config\" to use $0"
fi
# don't link to a workdir
if test -h "$git_dir/config"
then
die "\"$orig_git\" is a working directory only, please specify" \
"a complete repository."
fi
# make sure the links in the workdir have full paths to the original repo
git_dir=$(cd "$git_dir" && pwd) || exit 1
# don't recreate a workdir over an existing directory, unless it's empty
if test -d "$new_workdir"
then
if test $(ls -a1 "$new_workdir/." | wc -l) -ne 2
then
die "destination directory '$new_workdir' is not empty."
fi
cleandir="$new_workdir/.git"
else
cleandir="$new_workdir"
fi
mkdir -p "$new_workdir/.git" || failed
cleandir=$(cd "$cleandir" && pwd) || failed
cleanup () {
rm -rf "$cleandir"
}
siglist="0 1 2 15"
trap cleanup $siglist
# create the links to the original repo. explicitly exclude index, HEAD and
# logs/HEAD from the list since they are purely related to the current working
# directory, and should not be shared.
for x in config refs logs/refs objects info hooks packed-refs remotes rr-cache svn
do
# create a containing directory if needed
case $x in
*/*)
mkdir -p "$new_workdir/.git/${x%/*}"
;;
esac
ln -s "$git_dir/$x" "$new_workdir/.git/$x" || failed
done
# commands below this are run in the context of the new workdir
cd "$new_workdir" || failed
# copy the HEAD from the original repository as a default branch
cp "$git_dir/HEAD" .git/HEAD || failed
# the workdir is set up. if the checkout fails, the user can fix it.
trap - $siglist
# checkout the branch (either the same as HEAD from the original repository,
# or the one that was asked for)
git checkout -f $branch
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