Fix fake-bare worktree checkout

We have to jump through hoops to check out fake-bare repositories since
the target directory probably already exists. Thus, we cheat by telling
git-clone *not* to checkout and then read-tree and checkout-index
ourselves. We also convert the non-bare repository to a fake bare one by
moving stuff around.

Probably a bit hackish but this is the best I can do for now.

diff --git a/mr b/mr
index f5c37af2b332488aeac1e3c874ee43edc75fd89f..1b73639bd43686bf6cc707cc51df3b51967ee562 100755 (executable)
--- a/mr
+++ b/mr
@@ -1104,22 +1104,31 @@ register =
                if [ -z "$url" ]; then
                        error "cannot determine git url"
                fi
+               set -x
+               local clone_opts add_cmd work_tree suffix
                case "$repo_type" in
-                       bare|fake-bare)
-                               # this seems like a bare repo as it has no
-                               # worktree.
-                               local work_tree
+                       fake-bare)
+                               # this seems like a fake bare repo and needs a worktree
                                work_tree="$(git-config --get core.worktree)" || :
+                               work_tree="${work_tree%%/}/"
                                if [ ! -d "$work_tree" ]; then
-                                       error "git worktree $work_tree does not exist"
+                                       error "git worktree '$work_tree' does not exist"
                                fi
+                               clone_opts=" --no-checkout"
+                               add_cmd="$add_cmd && cd $basedir"
+                               add_cmd="$add_cmd && git read-tree HEAD"
+                               add_cmd="$add_cmd && git checkout-index -a --prefix='$work_tree' || :"
+                               add_cmd="$add_cmd; git config core.worktree '$work_tree'"
+                               add_cmd="$add_cmd && mv .git/* . && rmdir .git"
                                suffix=" (with worktree $work_tree)"
-                               mr -c "$MR_CONFIG" config "$PWD" \
-                                       lib="GIT_WORK_TREE=$work_tree; export GIT_WORK_TREE"
+                               ;;
+                       bare)
+                               clone_opts=" --bare"
+                               suffix=" (bare repository)"
                                ;;
                esac
                echo "Registering git url: $url in $MR_CONFIG${suffix:-}"
-               mr -c "$MR_CONFIG" config "$PWD" checkout="git clone $url $basedir"
+               mr -c "$MR_CONFIG" config "$PWD" checkout="git clone${clone_opts:-} $url $basedir${add_cmd:-}"
                ;;
        bzr)
                url=$(cat .bzr/branch/parent)