[PATCH v2 0/3] check-attr: integrate with sparse-index

change against v1:

* update a new commit message with more details

* update read_attr_from_index function

* add smudge/clean filters in test 'merge with conflict outside cone'

* add the missing perf test

* only verifying behavior in 'sparse-index' in test 'sparse-index is
not expanded: check-attr'

* show that the index is also not expanded files outside of
the sparse-checkout cone

Shuqi Liang (3):
  Enable gitattributes read from sparse directories
  t1092: add tests for `git check-attr`
  check-attr: integrate with sparse-index

 attr.c                                   | 42 +++++++++---------
 builtin/check-attr.c                     |  3 ++
 t/perf/p2000-sparse-operations.sh        |  1 +
 t/t1092-sparse-checkout-compatibility.sh | 55 ++++++++++++++++++++++++
 4 files changed, 80 insertions(+), 21 deletions(-)

Range-diff against v1:
1:  afa27ebe2d < -:  ---------- attr.c: read attributes in a sparse directory
-:  ---------- > 1:  0ff2ab9430 Enable gitattributes read from sparse directories
2:  5bb40b0327 ! 2:  835e1176b0 t1092: add tests for `git check-attr`
    @@ Metadata
      ## Commit message ##
         t1092: add tests for `git check-attr`
     
    +    Add smudge/clean filters in .gitattributes files inside the affected
    +    sparse directories in test 'merge with conflict outside cone', make sure
    +    it behaves as expected when path is outside of sparse-checkout.
    +
         Add tests for `git check-attr`, make sure it behaves as expected when
         path is both inside or outside of sparse-checkout definition.
     
    @@ Commit message
         Signed-off-by: Shuqi Liang <cheskaqiqi@gmail.com>
     
      ## t/t1092-sparse-checkout-compatibility.sh ##
    +@@ t/t1092-sparse-checkout-compatibility.sh: test_expect_success 'merge with conflict outside cone' '
    + 
    + 	test_all_match git checkout -b merge-tip merge-left &&
    + 	test_all_match git status --porcelain=v2 &&
    ++
    ++	echo "a filter=rot13" >>.gitattributes &&
    ++	run_on_sparse mkdir folder1 &&
    ++	run_on_all cp ../.gitattributes ./folder1 &&
    ++	git -C full-checkout add folder1/.gitattributes &&
    ++	run_on_sparse git add --sparse folder1/.gitattributes &&
    ++	run_on_all git commit -m "add .gitattributes" &&
    ++	test_sparse_match git sparse-checkout reapply &&
    ++	git config filter.rot13.clean "tr 'A-Za-z' 'N-ZA-Mn-za-m'" &&
    ++	git config filter.rot13.smudge "tr 'A-Za-z' 'N-ZA-Mn-za-m'" &&
    ++
    + 	test_all_match test_must_fail git merge -m merge merge-right &&
    + 	test_all_match git status --porcelain=v2 &&
    + 
     @@ t/t1092-sparse-checkout-compatibility.sh: test_expect_success 'worktree is not expanded' '
      	ensure_not_expanded worktree remove .worktrees/hotfix
      '
3:  abd14ddda7 < -:  ---------- check-attr: integrate with sparse-index
-:  ---------- > 3:  672d692e51 check-attr: integrate with sparse-index