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transport_local.c

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#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;

}