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checkout: use empty baseline when no index file exists by ethomson · Pull Request #3823 · libgit2/libgit2 · GitHub

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7 changes: 6 additions & 1 deletion src/checkout.c
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
Original file line number Diff line number Diff line change
Expand Up @@ -2430,8 +2430,13 @@ static int checkout_data_init(

if (!data->opts.baseline && !data->opts.baseline_index) {
data->opts_free_baseline = true;
error = 0;

error = checkout_lookup_head_tree(&data->opts.baseline, repo);
/* if we don't have an index, this is an initial checkout and
* should be against an empty baseline
*/
if (data->index->on_disk)
error = checkout_lookup_head_tree(&data->opts.baseline, repo);

if (error == GIT_EUNBORNBRANCH) {
error = 0;
Expand Down
63 changes: 63 additions & 0 deletions tests/checkout/tree.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1416,3 +1416,66 @@ void test_checkout_tree__safe_proceeds_if_no_index(void)
git_object_free(obj);
}

static int checkout_conflict_count_cb(
git_checkout_notify_t why,
const char *path,
const git_diff_file *b,
const git_diff_file *t,
const git_diff_file *w,
void *payload)
{
size_t *n = payload;

GIT_UNUSED(why);
GIT_UNUSED(path);
GIT_UNUSED(b);
GIT_UNUSED(t);
GIT_UNUSED(w);

(*n)++;

return 0;
}

/* A repo that has a HEAD (even a properly born HEAD that peels to
* a commit) but no index should be treated as if it's an empty baseline
*/
void test_checkout_tree__baseline_is_empty_when_no_index(void)
{
git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
git_reference *head;
git_object *obj;
git_status_list *status;
size_t conflicts = 0;

assert_on_branch(g_repo, "master");
cl_git_pass(git_repository_head(&head, g_repo));
cl_git_pass(git_reference_peel(&obj, head, GIT_OBJ_COMMIT));

cl_git_pass(git_reset(g_repo, obj, GIT_RESET_HARD, NULL));

cl_must_pass(p_unlink("testrepo/.git/index"));

/* for a safe checkout, we should have checkout conflicts with
* the existing untracked files.
*/
opts.checkout_strategy &= ~GIT_CHECKOUT_FORCE;
opts.notify_flags = GIT_CHECKOUT_NOTIFY_CONFLICT;
opts.notify_cb = checkout_conflict_count_cb;
opts.notify_payload = &conflicts;

cl_git_fail_with(GIT_ECONFLICT, git_checkout_tree(g_repo, obj, &opts));
cl_assert_equal_i(4, conflicts);

/* but force should succeed and update the index */
opts.checkout_strategy |= GIT_CHECKOUT_FORCE;
cl_git_pass(git_checkout_tree(g_repo, obj, &opts));

cl_git_pass(git_status_list_new(&status, g_repo, NULL));
cl_assert_equal_i(0, git_status_list_entrycount(status));
git_status_list_free(status);

git_object_free(obj);
git_reference_free(head);
}


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