test sub/dir/tracked = "$(git ls-files)")
'
+test_expect_success '_gently() groks relative GIT_DIR & GIT_WORK_TREE' '
+ cd repo.git/work/sub/dir &&
+ GIT_DIR=../../.. GIT_WORK_TREE=../.. GIT_PAGER= \
+ git diff --exit-code tracked &&
+ echo changed > tracked &&
+ ! GIT_DIR=../../.. GIT_WORK_TREE=../.. GIT_PAGER= \
+ git diff --exit-code tracked
+'
+
test_done