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rm: integrate with sparse-index

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Enable the sparse index within the `git-rm` command.

The `p2000` tests demonstrate a ~92% execution time reduction for
'git rm' using a sparse index.

Test                              HEAD~1            HEAD
--------------------------------------------------------------------------
2000.74: git rm ... (full-v3)     0.41(0.37+0.05)   0.43(0.36+0.07) +4.9%
2000.75: git rm ... (full-v4)     0.38(0.34+0.05)   0.39(0.35+0.05) +2.6%
2000.76: git rm ... (sparse-v3)   0.57(0.56+0.01)   0.05(0.05+0.00) -91.2%
2000.77: git rm ... (sparse-v4)   0.57(0.55+0.02)   0.03(0.03+0.00) -94.7%

----
Also, normalize a behavioral difference of `git-rm` under sparse-index.
See related discussion [1].

`git-rm` a sparse-directory entry within a sparse-index enabled repo
behaves differently from a sparse directory within a sparse-checkout
enabled repo.

For example, in a sparse-index repo, where 'folder1' is a
sparse-directory entry, `git rm -r --sparse folder1` provides this:

        rm 'folder1/'

Whereas in a sparse-checkout repo *without* sparse-index, doing so
provides this:

        rm 'folder1/0/0/0'
        rm 'folder1/0/1'
        rm 'folder1/a'

Because `git rm` a sparse-directory entry does not need to expand the
index, therefore we should accept the current behavior, which is faster
than "expand the sparse-directory entry to match the sparse-checkout
situation".

Modify a previous test so such difference is not considered as an error.

[1] https://github.com/ffyuanda/git/pull/6#discussion_r934861398

Helped-by: Victoria Dye <vdye@github.com>
Helped-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Shaoxuan Yuan <shaoxuan.yuan02@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Shaoxuan Yuan 2022-08-07 12:13:35 +08:00 committed by Junio C Hamano
parent bcf96cfca6
commit ede241c715
3 changed files with 20 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
builtin/rm.c
View file

@ -287,6 +287,8 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
if (!index_only)
setup_work_tree();
prepare_repo_settings(the_repository);
the_repository->settings.command_requires_full_index = 0;
hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
if (read_cache() < 0)

1
t/perf/p2000-sparse-operations.sh
View file

@ -123,5 +123,6 @@ test_perf_on_all git blame $SPARSE_CONE/f3/a
test_perf_on_all git read-tree -mu HEAD
test_perf_on_all git checkout-index -f --all
test_perf_on_all git update-index --add --remove $SPARSE_CONE/a
test_perf_on_all "git rm -f $SPARSE_CONE/a && git checkout HEAD -- $SPARSE_CONE/a"
test_done

20
t/t1092-sparse-checkout-compatibility.sh
View file

@ -937,7 +937,7 @@ test_expect_success 'read-tree --prefix' '
test_all_match git read-tree --prefix=deep/deeper1/deepest -u deepest &&
test_all_match git status --porcelain=v2 &&
test_all_match git rm -rf --sparse folder1/ &&
run_on_all git rm -rf --sparse folder1/ &&
test_all_match git read-tree --prefix=folder1/ -u update-folder1 &&
test_all_match git status --porcelain=v2 &&
@ -1899,7 +1899,7 @@ test_expect_success 'rm pathspec inside sparse definition' '
test_all_match git status --porcelain=v2
'
test_expect_failure 'rm pathspec outside sparse definition' '
test_expect_success 'rm pathspec outside sparse definition' '
init_repos &&
for file in folder1/a folder1/0/1
@ -1939,7 +1939,7 @@ test_expect_failure 'rm pathspec outside sparse definition' '
test_sparse_match git status --porcelain=v2
'
test_expect_failure 'rm pathspec expands index when necessary' '
test_expect_success 'rm pathspec expands index when necessary' '
init_repos &&
# in-cone pathspec (do not expand)
@ -1958,4 +1958,18 @@ test_expect_failure 'rm pathspec expands index when necessary' '
test_must_be_empty sparse-index-err
'
test_expect_success 'sparse index is not expanded: rm' '
init_repos &&
ensure_not_expanded rm deep/a &&
# test in-cone wildcard
git -C sparse-index reset --hard &&
ensure_not_expanded rm deep/* &&
# test recursive rm
git -C sparse-index reset --hard &&
ensure_not_expanded rm -r deep
'
test_done