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git-new-workdir: don't fail if the target directory is empty

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Allow new workdirs to be created in an empty directory (similar to "git
clone").  Provide more error checking and clean up on failure.

Signed-off-by: Paul Smith <paul@mad-scientist.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Paul Smith 2014-11-26 15:38:28 -05:00 committed by Junio C Hamano
parent e69b1ce000
commit e32afab7b0
1 changed files with 38 additions and 15 deletions
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53
contrib/workdir/git-new-workdir
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@ -10,6 +10,10 @@ die () {
exit 128
}
failed () {
die "unable to create new workdir '$new_workdir'!"
}
if test $# -lt 2 || test $# -gt 3
then
usage "$0 <repository> <new_workdir> [<branch>]"
@ -35,7 +39,7 @@ esac
# don't link to a configured bare repository
isbare=$(git --git-dir="$git_dir" config --bool --get core.bare)
if test ztrue = z$isbare
if test ztrue = "z$isbare"
then
die "\"$git_dir\" has core.bare set to true," \
" remove from \"$git_dir/config\" to use $0"
@ -48,35 +52,54 @@ then
"a complete repository."
fi
# don't recreate a workdir over an existing repository
if test -e "$new_workdir"
# 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 "$new_workdir"
then
die "destination directory '$new_workdir' already exists."
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="$new_workdir"
fi
# make sure the links use full paths
git_dir=$(cd "$git_dir"; pwd)
mkdir -p "$new_workdir/.git" || failed
cleandir=$(cd "$cleandir" && pwd) || failed
# create the workdir
mkdir -p "$new_workdir/.git" || die "unable to create \"$new_workdir\"!"
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 $x in
*/*)
mkdir -p "$(dirname "$new_workdir/.git/$x")"
mkdir -p "$new_workdir/.git/${x%/*}"
;;
esac
ln -s "$git_dir/$x" "$new_workdir/.git/$x"
ln -s "$git_dir/$x" "$new_workdir/.git/$x" || failed
done
# now setup the workdir
cd "$new_workdir"
# commands below this are run in the context of the new workdir
cd "$new_workdir" || failed
# copy the HEAD from the original repository as a default branch
cp "$git_dir/HEAD" .git/HEAD
# checkout the branch (either the same as HEAD from the original repository, or
# the one that was asked for)
cp "$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