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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* 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 "git2.h"
#include "common.h"
#include "pack.h"
#include "pack-objects.h"
#include "remote.h"
#include "vector.h"
#include "push.h"
static int push_spec_rref_cmp(const void *a, const void *b)
{
const push_spec *push_spec_a = a, *push_spec_b = b;
return strcmp(push_spec_a->rref, push_spec_b->rref);
}
static int push_status_ref_cmp(const void *a, const void *b)
{
const push_status *push_status_a = a, *push_status_b = b;
return strcmp(push_status_a->ref, push_status_b->ref);
}
int git_push_new(git_push **out, git_remote *remote)
{
git_push *p;
*out = NULL;
p = git__calloc(1, sizeof(*p));
GITERR_CHECK_ALLOC(p);
p->repo = remote->repo;
p->remote = remote;
p->report_status = 1;
if (git_vector_init(&p->specs, 0, push_spec_rref_cmp) < 0) {
git__free(p);
return -1;
}
if (git_vector_init(&p->status, 0, push_status_ref_cmp) < 0) {
git_vector_free(&p->specs);
git__free(p);
return -1;
}
*out = p;
return 0;
}
static void free_refspec(push_spec *spec)
{
if (spec == NULL)
return;
if (spec->lref)
git__free(spec->lref);
if (spec->rref)
git__free(spec->rref);
git__free(spec);
}
static void free_status(push_status *status)
{
if (status == NULL)
return;
if (status->msg)
git__free(status->msg);
git__free(status->ref);
git__free(status);
}
static int check_rref(char *ref)
{
if (git__prefixcmp(ref, "refs/")) {
giterr_set(GITERR_INVALID, "Not a valid reference '%s'", ref);
return -1;
}
return 0;
}
static int check_lref(git_push *push, char *ref)
{
/* lref must be resolvable to an existing object */
git_object *obj;
int error = git_revparse_single(&obj, push->repo, ref);
if (error) {
if (error == GIT_ENOTFOUND)
giterr_set(GITERR_REFERENCE,
"src refspec '%s' does not match any existing object", ref);
else
giterr_set(GITERR_INVALID, "Not a valid reference '%s'", ref);
return -1;
} else
git_object_free(obj);
return 0;
}
static int parse_refspec(git_push *push, push_spec **spec, const char *str)
{
push_spec *s;
char *delim;
*spec = NULL;
s = git__calloc(1, sizeof(*s));
GITERR_CHECK_ALLOC(s);
if (str[0] == '+') {
s->force = true;
str++;
}
delim = strchr(str, ':');
if (delim == NULL) {
s->lref = git__strdup(str);
if (!s->lref || check_lref(push, s->lref) < 0)
goto on_error;
} else {
if (delim - str) {
s->lref = git__strndup(str, delim - str);
if (!s->lref || check_lref(push, s->lref) < 0)
goto on_error;
}
if (strlen(delim + 1)) {
s->rref = git__strdup(delim + 1);
if (!s->rref || check_rref(s->rref) < 0)
goto on_error;
}
}
if (!s->lref && !s->rref)
goto on_error;
/* If rref is ommitted, use the same ref name as lref */
if (!s->rref) {
s->rref = git__strdup(s->lref);
if (!s->rref || check_rref(s->rref) < 0)
goto on_error;
}
*spec = s;
return 0;
on_error:
free_refspec(s);
return -1;
}
int git_push_add_refspec(git_push *push, const char *refspec)
{
push_spec *spec;
if (parse_refspec(push, &spec, refspec) < 0 ||
git_vector_insert(&push->specs, spec) < 0)
return -1;
return 0;
}
int git_push_update_tips(git_push *push)
{
git_refspec *fetch_spec = &push->remote->fetch;
git_buf remote_ref_name = GIT_BUF_INIT;
size_t i, j;
push_spec *push_spec;
git_reference *remote_ref;
push_status *status;
int error = 0;
git_vector_foreach(&push->status, i, status) {
/* If this ref update was successful (ok, not ng), it will have an empty message */
if (status->msg)
continue;
/* Find the corresponding remote ref */
if (!git_refspec_src_matches(fetch_spec, status->ref))
continue;
if ((error = git_refspec_transform_r(&remote_ref_name, fetch_spec, status->ref)) < 0)
goto on_error;
/* Find matching push ref spec */
git_vector_foreach(&push->specs, j, push_spec) {
if (!strcmp(push_spec->rref, status->ref))
break;
}
/* Could not find the corresponding push ref spec for this push update */
if (j == push->specs.length)
continue;
/* Update the remote ref */
if (git_oid_iszero(&push_spec->loid)) {
error = git_reference_lookup(&remote_ref, push->remote->repo, git_buf_cstr(&remote_ref_name));
if (!error) {
if ((error = git_reference_delete(remote_ref)) < 0)
goto on_error;
} else if (error == GIT_ENOTFOUND)
giterr_clear();
else
goto on_error;
} else if ((error = git_reference_create(NULL, push->remote->repo, git_buf_cstr(&remote_ref_name), &push_spec->loid, 1)) < 0)
goto on_error;
}
error = 0;
on_error:
git_buf_free(&remote_ref_name);
return error;
}
static int revwalk(git_vector *commits, git_push *push)
{
git_remote_head *head;
push_spec *spec;
git_revwalk *rw;
git_oid oid;
unsigned int i;
int error = -1;
if (git_revwalk_new(&rw, push->repo) < 0)
return -1;
git_revwalk_sorting(rw, GIT_SORT_TIME);
git_vector_foreach(&push->specs, i, spec) {
git_otype type;
size_t size;
if (git_oid_iszero(&spec->loid))
/*
* Delete reference on remote side;
* nothing to do here.
*/
continue;
if (git_oid_equal(&spec->loid, &spec->roid))
continue; /* up-to-date */
if (git_odb_read_header(&size, &type, push->repo->_odb, &spec->loid) < 0)
goto on_error;
if (type == GIT_OBJ_TAG) {
git_tag *tag;
git_object *target;
if (git_packbuilder_insert(push->pb, &spec->loid, NULL) < 0)
goto on_error;
if (git_tag_lookup(&tag, push->repo, &spec->loid) < 0)
goto on_error;
if (git_tag_peel(&target, tag) < 0) {
git_tag_free(tag);
goto on_error;
}
git_tag_free(tag);
if (git_object_type(target) == GIT_OBJ_COMMIT) {
if (git_revwalk_push(rw, git_object_id(target)) < 0) {
git_object_free(target);
goto on_error;
}
} else {
if (git_packbuilder_insert(
push->pb, git_object_id(target), NULL) < 0) {
git_object_free(target);
goto on_error;
}
}
git_object_free(target);
} else if (git_revwalk_push(rw, &spec->loid) < 0)
goto on_error;
if (!spec->force) {
git_oid base;
if (git_oid_iszero(&spec->roid))
continue;
if (!git_odb_exists(push->repo->_odb, &spec->roid)) {
giterr_clear();
error = GIT_ENONFASTFORWARD;
goto on_error;
}
error = git_merge_base(&base, push->repo,
&spec->loid, &spec->roid);
if (error == GIT_ENOTFOUND ||
(!error && !git_oid_equal(&base, &spec->roid))) {
giterr_clear();
error = GIT_ENONFASTFORWARD;
goto on_error;
}
if (error < 0)
goto on_error;
}
}
git_vector_foreach(&push->remote->refs, i, head) {
if (git_oid_iszero(&head->oid))
continue;
/* TODO */
git_revwalk_hide(rw, &head->oid);
}
while ((error = git_revwalk_next(&oid, rw)) == 0) {
git_oid *o = git__malloc(GIT_OID_RAWSZ);
GITERR_CHECK_ALLOC(o);
git_oid_cpy(o, &oid);
if (git_vector_insert(commits, o) < 0) {
error = -1;
goto on_error;
}
}
on_error:
git_revwalk_free(rw);
return error == GIT_ITEROVER ? 0 : error;
}
static int queue_objects(git_push *push)
{
git_vector commits;
git_oid *o;
unsigned int i;
int error;
if (git_vector_init(&commits, 0, NULL) < 0)
return -1;
if ((error = revwalk(&commits, push)) < 0)
goto on_error;
if (!commits.length) {
git_vector_free(&commits);
return 0; /* nothing to do */
}
git_vector_foreach(&commits, i, o) {
if ((error = git_packbuilder_insert(push->pb, o, NULL)) < 0)
goto on_error;
}
git_vector_foreach(&commits, i, o) {
git_object *obj;
if ((error = git_object_lookup(&obj, push->repo, o, GIT_OBJ_ANY)) < 0)
goto on_error;
switch (git_object_type(obj)) {
case GIT_OBJ_TAG: /* TODO: expect tags */
case GIT_OBJ_COMMIT:
if ((error = git_packbuilder_insert_tree(push->pb,
git_commit_tree_id((git_commit *)obj))) < 0) {
git_object_free(obj);
goto on_error;
}
break;
case GIT_OBJ_TREE:
case GIT_OBJ_BLOB:
default:
git_object_free(obj);
giterr_set(GITERR_INVALID, "Given object type invalid");
error = -1;
goto on_error;
}
git_object_free(obj);
}
error = 0;
on_error:
git_vector_foreach(&commits, i, o) {
git__free(o);
}
git_vector_free(&commits);
return error;
}
static int calculate_work(git_push *push)
{
git_remote_head *head;
push_spec *spec;
unsigned int i, j;
/* Update local and remote oids*/
git_vector_foreach(&push->specs, i, spec) {
if (spec->lref) {
/* This is a create or update. Local ref must exist. */
if (git_reference_name_to_id(
&spec->loid, push->repo, spec->lref) < 0) {
giterr_set(GIT_ENOTFOUND, "No such reference '%s'", spec->lref);
return -1;
}
}
if (spec->rref) {
/* Remote ref may or may not (e.g. during create) already exist. */
git_vector_foreach(&push->remote->refs, j, head) {
if (!strcmp(spec->rref, head->name)) {
git_oid_cpy(&spec->roid, &head->oid);
break;
}
}
}
}
return 0;
}
static int do_push(git_push *push)
{
int error;
git_transport *transport = push->remote->transport;
if (!transport->push) {
giterr_set(GITERR_NET, "Remote transport doesn't support push");
error = -1;
goto on_error;
}
/*
* A pack-file MUST be sent if either create or update command
* is used, even if the server already has all the necessary
* objects. In this case the client MUST send an empty pack-file.
*/
if ((error = git_packbuilder_new(&push->pb, push->repo)) < 0 ||
(error = calculate_work(push)) < 0 ||
(error = queue_objects(push)) < 0 ||
(error = transport->push(transport, push)) < 0)
goto on_error;
error = 0;
on_error:
git_packbuilder_free(push->pb);
return error;
}
static int cb_filter_refs(git_remote_head *ref, void *data)
{
git_remote *remote = (git_remote *) data;
return git_vector_insert(&remote->refs, ref);
}
static int filter_refs(git_remote *remote)
{
git_vector_clear(&remote->refs);
return git_remote_ls(remote, cb_filter_refs, remote);
}
int git_push_finish(git_push *push)
{
int error;
if (!git_remote_connected(push->remote) &&
(error = git_remote_connect(push->remote, GIT_DIRECTION_PUSH)) < 0)
return error;
if ((error = filter_refs(push->remote)) < 0 ||
(error = do_push(push)) < 0)
return error;
return 0;
}
int git_push_unpack_ok(git_push *push)
{
return push->unpack_ok;
}
int git_push_status_foreach(git_push *push,
int (*cb)(const char *ref, const char *msg, void *data),
void *data)
{
push_status *status;
unsigned int i;
git_vector_foreach(&push->status, i, status) {
if (cb(status->ref, status->msg, data) < 0)
return GIT_EUSER;
}
return 0;
}
void git_push_free(git_push *push)
{
push_spec *spec;
push_status *status;
unsigned int i;
if (push == NULL)
return;
git_vector_foreach(&push->specs, i, spec) {
free_refspec(spec);
}
git_vector_free(&push->specs);
git_vector_foreach(&push->status, i, status) {
free_status(status);
}
git_vector_free(&push->status);
git__free(push);
}
|