[PATCH v4 0/2] diff-files: integrate with sparse index

Changes since v3:

1.Use 'test_must_be_empty' instead of '! test_file_not_empty'

2.remove useless 'test_file_not_empty sparse-checkout-out' in 'file present on-disk with modifications'

Shuqi Liang (2):
  t1092: add tests for `git diff-files`
  diff-files: integrate with sparse index

 builtin/diff-files.c                     |  4 ++
 t/perf/p2000-sparse-operations.sh        |  2 +
 t/t1092-sparse-checkout-compatibility.sh | 52 ++++++++++++++++++++++++
 3 files changed, 58 insertions(+)

base-commit: a38d39a4c50d1275833aba54c4dbdfce9e2e9ca1