Hash :
fe9a0e09
Author :
Date :
2011-11-29T11:02:42
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/*
* Copyright (C) 2009-2011 the libgit2 contributors
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "git2/types.h"
#include "git2/net.h"
#include "git2/repository.h"
#include "git2/object.h"
#include "git2/tag.h"
#include "refs.h"
#include "transport.h"
#include "posix.h"
typedef struct {
git_transport parent;
git_repository *repo;
git_vector refs;
} transport_local;
static int add_ref(transport_local *t, const char *name)
{
const char peeled[] = "^{}";
git_remote_head *head;
git_reference *ref, *resolved_ref;
git_object *obj = NULL;
int error = GIT_SUCCESS, peel_len, ret;
head = git__malloc(sizeof(git_remote_head));
if (head == NULL)
return GIT_ENOMEM;
head->name = git__strdup(name);
if (head->name == NULL) {
error = GIT_ENOMEM;
goto out;
}
error = git_reference_lookup(&ref, t->repo, name);
if (error < GIT_SUCCESS)
goto out;
error = git_reference_resolve(&resolved_ref, ref);
if (error < GIT_SUCCESS)
goto out;
git_oid_cpy(&head->oid, git_reference_oid(ref));
error = git_vector_insert(&t->refs, head);
if (error < GIT_SUCCESS)
goto out;
head = NULL;
/* If it's not a tag, we don't need to try to peel it */
if (git__prefixcmp(name, GIT_REFS_TAGS_DIR))
goto out;
error = git_object_lookup(&obj, t->repo, &head->oid, GIT_OBJ_ANY);
if (error < GIT_SUCCESS) {
git__rethrow(error, "Failed to lookup object");
}
/* If it's not an annotated tag, just get out */
if (git_object_type(obj) != GIT_OBJ_TAG)
goto out;
/* And if it's a tag, peel it, and add it to the list */
head = git__malloc(sizeof(git_remote_head));
peel_len = strlen(name) + strlen(peeled);
head->name = git__malloc(peel_len + 1);
ret = p_snprintf(head->name, peel_len + 1, "%s%s", name, peeled);
assert(ret < peel_len + 1);
(void)ret;
git_oid_cpy(&head->oid, git_tag_target_oid((git_tag *) obj));
error = git_vector_insert(&t->refs, head);
if (error < GIT_SUCCESS)
goto out;
out:
git_reference_free(ref);
git_reference_free(resolved_ref);
git_object_free(obj);
if (head && error < GIT_SUCCESS) {
git__free(head->name);
git__free(head);
}
return error;
}
static int store_refs(transport_local *t)
{
int error;
unsigned int i;
git_strarray ref_names = {0};
assert(t);
error = git_vector_init(&t->refs, ref_names.count, NULL);
if (error < GIT_SUCCESS)
return error;
error = git_reference_listall(&ref_names, t->repo, GIT_REF_LISTALL);
if (error < GIT_SUCCESS)
return git__rethrow(error, "Failed to list remote heads");
/* Sort the references first */
git__tsort((void **)ref_names.strings, ref_names.count, &git__strcmp_cb);
/* Add HEAD */
error = add_ref(t, GIT_HEAD_FILE);
if (error < GIT_SUCCESS)
goto cleanup;
for (i = 0; i < ref_names.count; ++i) {
error = add_ref(t, ref_names.strings[i]);
if (error < GIT_SUCCESS)
goto cleanup;
}
cleanup:
git_strarray_free(&ref_names);
return error;
}
static int local_ls(git_transport *transport, git_headlist_cb list_cb, void *payload)
{
transport_local *t = (transport_local *) transport;
git_vector *refs = &t->refs;
unsigned int i;
git_remote_head *h;
assert(transport && transport->connected);
git_vector_foreach(refs, i, h) {
if (list_cb(h, payload) < 0)
return git__throw(GIT_ERROR,
"The user callback returned an error code");
}
return GIT_SUCCESS;
}
/*
* Try to open the url as a git directory. The direction doesn't
* matter in this case because we're calulating the heads ourselves.
*/
static int local_connect(git_transport *transport, int GIT_UNUSED(direction))
{
git_repository *repo;
int error;
transport_local *t = (transport_local *) transport;
const char *path;
const char file_prefix[] = "file://";
GIT_UNUSED_ARG(direction);
/* The repo layer doesn't want the prefix */
if (!git__prefixcmp(transport->url, file_prefix))
path = transport->url + strlen(file_prefix);
else
path = transport->url;
error = git_repository_open(&repo, path);
if (error < GIT_SUCCESS)
return git__rethrow(error, "Failed to open remote");
error = store_refs(t);
if (error < GIT_SUCCESS)
return git__rethrow(error, "Failed to retrieve references");
t->repo = repo;
t->parent.connected = 1;
return GIT_SUCCESS;
}
static int local_close(git_transport *GIT_UNUSED(transport))
{
transport_local *t = (transport_local *)transport;
git_repository_free(t->repo);
t->repo = NULL;
return GIT_SUCCESS;
}
static void local_free(git_transport *transport)
{
unsigned int i;
transport_local *t = (transport_local *) transport;
git_vector *vec = &t->refs;
git_remote_head *h;
assert(transport);
git_vector_foreach (vec, i, h) {
git__free(h->name);
git__free(h);
}
git_vector_free(vec);
git__free(t->parent.url);
git__free(t);
}
/**************
* Public API *
**************/
int git_transport_local(git_transport **out)
{
transport_local *t;
t = git__malloc(sizeof(transport_local));
if (t == NULL)
return GIT_ENOMEM;
memset(t, 0x0, sizeof(transport_local));
t->parent.connect = local_connect;
t->parent.ls = local_ls;
t->parent.close = local_close;
t->parent.free = local_free;
*out = (git_transport *) t;
return GIT_SUCCESS;
}