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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/transport.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;
git_headarray wants_list;
} transport_local;
/*
* 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");
t->repo = repo;
t->parent.connected = 1;
return GIT_SUCCESS;
}
static int add_ref(const char *name, git_repository *repo, git_vector *vec)
{
const char peeled[] = "^{}";
git_remote_head *head;
git_reference *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, repo, name);
if (error < GIT_SUCCESS)
goto out;
error = git_reference_resolve(&ref, ref);
if (error < GIT_SUCCESS)
goto out;
git_oid_cpy(&head->oid, git_reference_oid(ref));
error = git_vector_insert(vec, head);
if (error < GIT_SUCCESS)
goto out;
/* 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, 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);
if (ret >= peel_len + 1) {
error = git__throw(GIT_ERROR, "The string is magically to long");
}
git_oid_cpy(&head->oid, git_tag_target_oid((git_tag *) obj));
error = git_vector_insert(vec, head);
if (error < GIT_SUCCESS)
goto out;
out:
git_object_close(obj);
if (error < GIT_SUCCESS) {
free(head->name);
free(head);
}
return error;
}
static int local_ls(git_transport *transport, git_headarray *array)
{
int error;
unsigned int i;
git_repository *repo;
git_vector *vec;
git_strarray refs;
transport_local *t = (transport_local *) transport;
assert(transport && transport->connected);
repo = t->repo;
error = git_reference_listall(&refs, repo, GIT_REF_LISTALL);
if (error < GIT_SUCCESS)
return git__rethrow(error, "Failed to list remote heads");
vec = git__malloc(sizeof(git_vector));
if (vec == NULL) {
error = GIT_ENOMEM;
goto out;
}
error = git_vector_init(vec, refs.count, NULL);
if (error < GIT_SUCCESS)
return error;
/* Sort the references first */
git__tsort((void **)refs.strings, refs.count, &git__strcmp_cb);
/* Add HEAD */
error = add_ref(GIT_HEAD_FILE, repo, vec);
if (error < GIT_SUCCESS)
goto out;
for (i = 0; i < refs.count; ++i) {
error = add_ref(refs.strings[i], repo, vec);
if (error < GIT_SUCCESS)
goto out;
}
array->len = vec->length;
array->heads = (git_remote_head **)vec->contents;
t->refs = vec;
out:
git_strarray_free(&refs);
return error;
}
static int local_send_wants(git_transport *transport, git_headarray *array)
{
transport_local *t = (transport_local *) transport;
git_headarray *wants = &t->wants_list;
/*
* We need to store the list of wanted references so we can figure
* out what to transmit later.
*/
wants->len = array->len;
wants->heads = array->heads;
/* We're local anyway, so we don't need this */
return GIT_SUCCESS;
}
static int local_close(git_transport *GIT_UNUSED(transport))
{
/* Nothing to do */
GIT_UNUSED_ARG(transport);
return GIT_SUCCESS;
}
static void local_free(git_transport *transport)
{
unsigned int i;
transport_local *t = (transport_local *) transport;
git_vector *vec = t->refs;
assert(transport);
for (i = 0; i < vec->length; ++i) {
git_remote_head *h = git_vector_get(vec, i);
free(h->name);
free(h);
}
git_vector_free(vec);
free(vec);
git_repository_free(t->repo);
free(t->parent.url);
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;
t->parent.connect = local_connect;
t->parent.ls = local_ls;
t->parent.send_wants = local_send_wants;
t->parent.close = local_close;
t->parent.free = local_free;
*out = (git_transport *) t;
return GIT_SUCCESS;
}
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