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checkout-index: integrate with sparse index

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Add repository settings to allow usage of the sparse index.

When using the `--all` option, sparse directories are ignored by default due
to the `skip-worktree` flag, so there is no need to expand the index. If
`--ignore-skip-worktree-bits` is specified, the index is expanded in order
to check out all files.

When checking out individual files, existing behavior in a full index is to
exit with an error if a directory is specified (as the directory name will
not match an index entry). However, it is possible in a sparse index to
match a directory name to a sparse directory index entry, but checking out
that sparse directory still results in an error on checkout. To reduce some
potential confusion for users, `checkout_file(...)` explicitly exits with an
informative error if provided with a sparse directory name. The test
corresponding to this scenario verifies the error message, which now differs
between sparse index and non-sparse index checkouts.

Signed-off-by: Victoria Dye <vdye@github.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Victoria Dye 2022-01-11 18:05:03 +00:00 committed by Junio C Hamano
parent 88078f543b
commit 35682ada44
2 changed files with 36 additions and 3 deletions
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28
builtin/checkout-index.c
View file

@ -67,6 +67,7 @@ static int checkout_file(const char *name, const char *prefix)
int namelen = strlen(name);
int pos = cache_name_pos(name, namelen);
int has_same_name = 0;
int is_file = 0;
int is_skipped = 1;
int did_checkout = 0;
int errs = 0;
@ -81,6 +82,9 @@ static int checkout_file(const char *name, const char *prefix)
break;
has_same_name = 1;
pos++;
if (S_ISSPARSEDIR(ce->ce_mode))
break;
is_file = 1;
if (!ignore_skip_worktree && ce_skip_worktree(ce))
break;
is_skipped = 0;
@ -112,6 +116,8 @@ static int checkout_file(const char *name, const char *prefix)
fprintf(stderr, "git checkout-index: %s ", name);
if (!has_same_name)
fprintf(stderr, "is not in the cache");
else if (!is_file)
fprintf(stderr, "is a sparse directory");
else if (is_skipped)
fprintf(stderr, "has skip-worktree enabled; "
"use '--ignore-skip-worktree-bits' to checkout");
@ -130,10 +136,25 @@ static int checkout_all(const char *prefix, int prefix_length)
int i, errs = 0;
struct cache_entry *last_ce = NULL;
/* TODO: audit for interaction with sparse-index. */
ensure_full_index(&the_index);
for (i = 0; i < active_nr ; i++) {
struct cache_entry *ce = active_cache[i];
if (S_ISSPARSEDIR(ce->ce_mode)) {
if (!ce_skip_worktree(ce))
BUG("sparse directory '%s' does not have skip-worktree set", ce->name);
/*
* If the current entry is a sparse directory and skip-worktree
* entries are being checked out, expand the index and continue
* the loop on the current index position (now pointing to the
* first entry inside the expanded sparse directory).
*/
if (ignore_skip_worktree) {
ensure_full_index(&the_index);
ce = active_cache[i];
}
}
if (!ignore_skip_worktree && ce_skip_worktree(ce))
continue;
if (ce_stage(ce) != checkout_stage
@ -225,6 +246,9 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
git_config(git_default_config, NULL);
prefix_length = prefix ? strlen(prefix) : 0;
prepare_repo_settings(the_repository);
the_repository->settings.command_requires_full_index = 0;
if (read_cache() < 0) {
die("invalid cache");
}

11
t/t1092-sparse-checkout-compatibility.sh
View file

@ -801,7 +801,14 @@ test_expect_success 'checkout-index with folders' '
test_all_match test_must_fail git checkout-index -f -- deep/ &&
# Outside checkout definition
test_all_match test_must_fail git checkout-index -f -- folder1/
# Note: although all tests fail (as expected), the messaging differs. For
# non-sparse index checkouts, the error is that the "file" does not appear
# in the index; for sparse checkouts, the error is explicitly that the
# entry is a sparse directory.
run_on_all test_must_fail git checkout-index -f -- folder1/ &&
test_cmp full-checkout-err sparse-checkout-err &&
! test_cmp full-checkout-err sparse-index-err &&
grep "is a sparse directory" sparse-index-err
'
test_expect_success 'checkout-index --all' '
@ -972,6 +979,8 @@ test_expect_success 'sparse-index is not expanded' '
echo >>sparse-index/untracked.txt &&
ensure_not_expanded add . &&
ensure_not_expanded checkout-index -f a &&
ensure_not_expanded checkout-index -f --all &&
for ref in update-deep update-folder1 update-folder2 update-deep
do
echo >>sparse-index/README.md &&