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#!/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 |