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reset: make git_reset() cope with an orphaned HEAD

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This commit is contained in:
nulltoken 2012-10-20 12:09:02 +02:00
parent cd1ef82253
commit c436ed26e0
2 changed files with 61 additions and 6 deletions
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46
src/reset.c
View File

@ -19,6 +19,45 @@ static int reset_error_invalid(const char *msg)
return -1;
}
static int update_head(git_repository *repo, git_object *commit)
{
int error;
git_reference *head = NULL, *target = NULL;
error = git_repository_head(&head, repo);
if (error < 0 && error != GIT_EORPHANEDHEAD)
return error;
if (error == GIT_EORPHANEDHEAD) {
giterr_clear();
/*
* TODO: This is a bit weak as this doesn't support chained
* symbolic references. yet.
*/
if ((error = git_reference_lookup(&head, repo, GIT_HEAD_FILE)) < 0)
goto cleanup;
if ((error = git_reference_create_oid(
&target,
repo,
git_reference_target(head),
git_object_id(commit), 0)) < 0)
goto cleanup;
} else {
if ((error = git_reference_set_oid(head, git_object_id(commit))) < 0)
goto cleanup;
}
error = 0;
cleanup:
git_reference_free(head);
git_reference_free(target);
return error;
}
int git_reset(
git_repository *repo,
git_object *target,
@ -29,7 +68,6 @@ int git_reset(
git_tree *tree = NULL;
int error = -1;
git_checkout_opts opts;
git_reference *head = NULL;
assert(repo && target);
assert(reset_type == GIT_RESET_SOFT
@ -52,10 +90,7 @@ int git_reset(
//TODO: Check for unmerged entries
if (git_repository_head(&head, repo) < 0)
goto cleanup;
if (git_reference_set_oid(head, git_object_id(commit)) < 0)
if (update_head(repo, commit) < 0)
goto cleanup;
if (reset_type == GIT_RESET_SOFT) {
@ -102,7 +137,6 @@ int git_reset(
error = 0;
cleanup:
git_reference_free(head);
git_object_free(commit);
git_index_free(index);
git_tree_free(tree);

21
tests-clar/reset/soft.c
View File

@ -1,5 +1,6 @@
#include "clar_libgit2.h"
#include "reset_helpers.h"
#include "repo/repo_helpers.h"
static git_repository *repo;
static git_object *target;
@ -89,3 +90,23 @@ void test_reset_soft__cannot_reset_to_a_tag_not_pointing_at_a_commit(void)
retrieve_target_from_oid(&target, repo, "521d87c1ec3aef9824daf6d96cc0ae3710766d91");
cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT));
}
void test_reset_soft__resetting_against_an_orphaned_head_repo_makes_the_head_no_longer_orphaned(void)
{
git_reference *head;
retrieve_target_from_oid(&target, repo, KNOWN_COMMIT_IN_BARE_REPO);
make_head_orphaned(repo, NON_EXISTING_HEAD);
cl_assert_equal_i(true, git_repository_head_orphan(repo));
cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT));
cl_assert_equal_i(false, git_repository_head_orphan(repo));
cl_git_pass(git_reference_lookup(&head, repo, NON_EXISTING_HEAD));
cl_assert_equal_i(0, git_oid_streq(git_reference_oid(head), KNOWN_COMMIT_IN_BARE_REPO));
git_reference_free(head);
}