Change a "cd xyz && work && cd .." pattern introduced in
9c4d6c0297 (cache-tree: Write updated cache-tree after commit,
2014-07-13) to use a sub-shell instead with less indirection.

We did actually recover correctly if we failed in this function since
we were wrapped in a subshell one function call up. Let's just use the
sub-shell at the point where we want to change the directory
instead. This also allows us to get rid of the wrapper function.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 t/t0090-cache-tree.sh | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/t/t0090-cache-tree.sh b/t/t0090-cache-tree.sh
index 354b7f15f7..2e3efeb80e 100755
--- a/t/t0090-cache-tree.sh
+++ b/t/t0090-cache-tree.sh

@@ -27,20 +27,15 @@ generate_expected_cache_tree_rec () {
 	printf "SHA $dir (%d entries, %d subtrees)\n" "$entries" "$subtree_count" &&
 	for subtree in $subtrees
 	do
-		cd "$subtree"
-		generate_expected_cache_tree_rec "$dir$subtree" || return 1
-		cd ..
+		(
+			cd "$subtree"
+			generate_expected_cache_tree_rec "$dir$subtree" || return 1
+		)
 	done
 }
 
-generate_expected_cache_tree () {
-	(
-		generate_expected_cache_tree_rec
-	)
-}
-
 test_cache_tree () {
-	generate_expected_cache_tree >expect &&
+	generate_expected_cache_tree_rec >expect &&
 	cmp_cache_tree expect
 }
 

-- 
2.29.2.222.g5d2a92d10f8