--- /dev/null
+/*
+ * 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 "push.h"
+
+#include "git2.h"
+
+#include "pack.h"
+#include "pack-objects.h"
+#include "remote.h"
+#include "vector.h"
+#include "tree.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->refspec.dst, push_spec_b->refspec.dst);
+}
+
+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, const git_push_options *opts)
+{
+ git_push *p;
+
+ *out = NULL;
+
+ GIT_ERROR_CHECK_VERSION(opts, GIT_PUSH_OPTIONS_VERSION, "git_push_options");
+
+ p = git__calloc(1, sizeof(*p));
+ GIT_ERROR_CHECK_ALLOC(p);
+
+ p->repo = remote->repo;
+ p->remote = remote;
+ p->report_status = 1;
+ p->pb_parallelism = opts ? opts->pb_parallelism : 1;
+
+ if (opts) {
+ GIT_ERROR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
+ memcpy(&p->callbacks, &opts->callbacks, sizeof(git_remote_callbacks));
+ }
+
+ 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;
+ }
+
+ if (git_vector_init(&p->updates, 0, NULL) < 0) {
+ git_vector_free(&p->status);
+ 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;
+
+ git_refspec__dispose(&spec->refspec);
+ git__free(spec);
+}
+
+static int check_rref(char *ref)
+{
+ if (git__prefixcmp(ref, "refs/")) {
+ git_error_set(GIT_ERROR_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);
+ git_object_free(obj);
+
+ if (!error)
+ return 0;
+
+ if (error == GIT_ENOTFOUND)
+ git_error_set(GIT_ERROR_REFERENCE,
+ "src refspec '%s' does not match any existing object", ref);
+ else
+ git_error_set(GIT_ERROR_INVALID, "not a valid reference '%s'", ref);
+ return -1;
+}
+
+static int parse_refspec(git_push *push, push_spec **spec, const char *str)
+{
+ push_spec *s;
+
+ *spec = NULL;
+
+ s = git__calloc(1, sizeof(*s));
+ GIT_ERROR_CHECK_ALLOC(s);
+
+ if (git_refspec__parse(&s->refspec, str, false) < 0) {
+ git_error_set(GIT_ERROR_INVALID, "invalid refspec %s", str);
+ goto on_error;
+ }
+
+ if (s->refspec.src && s->refspec.src[0] != '\0' &&
+ check_lref(push, s->refspec.src) < 0) {
+ goto on_error;
+ }
+
+ if (check_rref(s->refspec.dst) < 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, const git_remote_callbacks *callbacks)
+{
+ git_str remote_ref_name = GIT_STR_INIT;
+ size_t i, j;
+ git_refspec *fetch_spec;
+ push_spec *push_spec = NULL;
+ git_reference *remote_ref;
+ push_status *status;
+ int error = 0;
+
+ git_vector_foreach(&push->status, i, status) {
+ int fire_callback = 1;
+
+ /* Skip unsuccessful updates which have non-empty messages */
+ if (status->msg)
+ continue;
+
+ /* Find the corresponding remote ref */
+ fetch_spec = git_remote__matching_refspec(push->remote, status->ref);
+ if (!fetch_spec)
+ continue;
+
+ /* Clear the buffer which can be dirty from previous iteration */
+ git_str_clear(&remote_ref_name);
+
+ if ((error = git_refspec__transform(&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->refspec.dst, 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_is_zero(&push_spec->loid)) {
+ error = git_reference_lookup(&remote_ref, push->remote->repo, git_str_cstr(&remote_ref_name));
+
+ if (error >= 0) {
+ error = git_reference_delete(remote_ref);
+ git_reference_free(remote_ref);
+ }
+ } else {
+ error = git_reference_create(NULL, push->remote->repo,
+ git_str_cstr(&remote_ref_name), &push_spec->loid, 1,
+ "update by push");
+ }
+
+ if (error < 0) {
+ if (error != GIT_ENOTFOUND)
+ goto on_error;
+
+ git_error_clear();
+ fire_callback = 0;
+ }
+
+ if (fire_callback && callbacks && callbacks->update_tips) {
+ error = callbacks->update_tips(git_str_cstr(&remote_ref_name),
+ &push_spec->roid, &push_spec->loid, callbacks->payload);
+
+ if (error < 0)
+ goto on_error;
+ }
+ }
+
+ error = 0;
+
+on_error:
+ git_str_dispose(&remote_ref_name);
+ return error;
+}
+
+/**
+ * Insert all tags until we find a non-tag object, which is returned
+ * in `out`.
+ */
+static int enqueue_tag(git_object **out, git_push *push, git_oid *id)
+{
+ git_object *obj = NULL, *target = NULL;
+ int error;
+
+ if ((error = git_object_lookup(&obj, push->repo, id, GIT_OBJECT_TAG)) < 0)
+ return error;
+
+ while (git_object_type(obj) == GIT_OBJECT_TAG) {
+ if ((error = git_packbuilder_insert(push->pb, git_object_id(obj), NULL)) < 0)
+ break;
+
+ if ((error = git_tag_target(&target, (git_tag *) obj)) < 0)
+ break;
+
+ git_object_free(obj);
+ obj = target;
+ }
+
+ if (error < 0)
+ git_object_free(obj);
+ else
+ *out = obj;
+
+ return error;
+}
+
+static int queue_objects(git_push *push)
+{
+ git_remote_head *head;
+ push_spec *spec;
+ git_revwalk *rw;
+ 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_object_t type;
+ size_t size;
+
+ if (git_oid_is_zero(&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 ((error = git_odb_read_header(&size, &type, push->repo->_odb, &spec->loid)) < 0)
+ goto on_error;
+
+ if (type == GIT_OBJECT_TAG) {
+ git_object *target;
+
+ if ((error = enqueue_tag(&target, push, &spec->loid)) < 0)
+ goto on_error;
+
+ if (git_object_type(target) == GIT_OBJECT_COMMIT) {
+ if ((error = git_revwalk_push(rw, git_object_id(target))) < 0) {
+ git_object_free(target);
+ goto on_error;
+ }
+ } else {
+ if ((error = git_packbuilder_insert(
+ push->pb, git_object_id(target), NULL)) < 0) {
+ git_object_free(target);
+ goto on_error;
+ }
+ }
+ git_object_free(target);
+ } else if ((error = git_revwalk_push(rw, &spec->loid)) < 0)
+ goto on_error;
+
+ if (!spec->refspec.force) {
+ git_oid base;
+
+ if (git_oid_is_zero(&spec->roid))
+ continue;
+
+ if (!git_odb_exists(push->repo->_odb, &spec->roid)) {
+ git_error_set(GIT_ERROR_REFERENCE,
+ "cannot push because a reference that you are trying to update on the remote contains commits that are not present locally.");
+ 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))) {
+ git_error_set(GIT_ERROR_REFERENCE,
+ "cannot push non-fastforwardable reference");
+ error = GIT_ENONFASTFORWARD;
+ goto on_error;
+ }
+
+ if (error < 0)
+ goto on_error;
+ }
+ }
+
+ git_vector_foreach(&push->remote->refs, i, head) {
+ if (git_oid_is_zero(&head->oid))
+ continue;
+
+ if ((error = git_revwalk_hide(rw, &head->oid)) < 0 &&
+ error != GIT_ENOTFOUND && error != GIT_EINVALIDSPEC && error != GIT_EPEEL)
+ goto on_error;
+ }
+
+ error = git_packbuilder_insert_walk(push->pb, rw);
+
+on_error:
+ git_revwalk_free(rw);
+ return error;
+}
+
+static int add_update(git_push *push, push_spec *spec)
+{
+ git_push_update *u = git__calloc(1, sizeof(git_push_update));
+ GIT_ERROR_CHECK_ALLOC(u);
+
+ u->src_refname = git__strdup(spec->refspec.src);
+ GIT_ERROR_CHECK_ALLOC(u->src_refname);
+
+ u->dst_refname = git__strdup(spec->refspec.dst);
+ GIT_ERROR_CHECK_ALLOC(u->dst_refname);
+
+ git_oid_cpy(&u->src, &spec->roid);
+ git_oid_cpy(&u->dst, &spec->loid);
+
+ return git_vector_insert(&push->updates, u);
+}
+
+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->refspec.src && spec->refspec.src[0]!= '\0') {
+ /* This is a create or update. Local ref must exist. */
+ if (git_reference_name_to_id(
+ &spec->loid, push->repo, spec->refspec.src) < 0) {
+ git_error_set(GIT_ERROR_REFERENCE, "no such reference '%s'", spec->refspec.src);
+ return -1;
+ }
+ }
+
+ /* Remote ref may or may not (e.g. during create) already exist. */
+ git_vector_foreach(&push->remote->refs, j, head) {
+ if (!strcmp(spec->refspec.dst, head->name)) {
+ git_oid_cpy(&spec->roid, &head->oid);
+ break;
+ }
+ }
+
+ if (add_update(push, spec) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+static int do_push(git_push *push)
+{
+ int error = 0;
+ git_transport *transport = push->remote->transport;
+ git_remote_callbacks *callbacks = &push->callbacks;
+
+ if (!transport->push) {
+ git_error_set(GIT_ERROR_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)
+ goto on_error;
+
+ git_packbuilder_set_threads(push->pb, push->pb_parallelism);
+
+ if (callbacks && callbacks->pack_progress)
+ if ((error = git_packbuilder_set_callbacks(push->pb, callbacks->pack_progress, callbacks->payload)) < 0)
+ goto on_error;
+
+ if ((error = calculate_work(push)) < 0)
+ goto on_error;
+
+ if (callbacks && callbacks->push_negotiation &&
+ (error = callbacks->push_negotiation((const git_push_update **) push->updates.contents,
+ push->updates.length, callbacks->payload)) < 0)
+ goto on_error;
+
+ if ((error = queue_objects(push)) < 0 ||
+ (error = transport->push(transport, push)) < 0)
+ goto on_error;
+
+on_error:
+ git_packbuilder_free(push->pb);
+ return error;
+}
+
+static int filter_refs(git_remote *remote)
+{
+ const git_remote_head **heads;
+ size_t heads_len, i;
+
+ git_vector_clear(&remote->refs);
+
+ if (git_remote_ls(&heads, &heads_len, remote) < 0)
+ return -1;
+
+ for (i = 0; i < heads_len; i++) {
+ if (git_vector_insert(&remote->refs, (void *)heads[i]) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+int git_push_finish(git_push *push)
+{
+ int error;
+
+ if (!git_remote_connected(push->remote)) {
+ git_error_set(GIT_ERROR_NET, "remote is disconnected");
+ return -1;
+ }
+
+ if ((error = filter_refs(push->remote)) < 0 ||
+ (error = do_push(push)) < 0)
+ return error;
+
+ if (!push->unpack_ok) {
+ error = -1;
+ git_error_set(GIT_ERROR_NET, "unpacking the sent packfile failed on the remote");
+ }
+
+ return error;
+}
+
+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) {
+ int error = cb(status->ref, status->msg, data);
+ if (error)
+ return git_error_set_after_callback(error);
+ }
+
+ return 0;
+}
+
+void git_push_status_free(push_status *status)
+{
+ if (status == NULL)
+ return;
+
+ git__free(status->msg);
+ git__free(status->ref);
+ git__free(status);
+}
+
+void git_push_free(git_push *push)
+{
+ push_spec *spec;
+ push_status *status;
+ git_push_update *update;
+ 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) {
+ git_push_status_free(status);
+ }
+ git_vector_free(&push->status);
+
+ git_vector_foreach(&push->updates, i, update) {
+ git__free(update->src_refname);
+ git__free(update->dst_refname);
+ git__free(update);
+ }
+ git_vector_free(&push->updates);
+
+ git__free(push);
+}
+
+int git_push_options_init(git_push_options *opts, unsigned int version)
+{
+ GIT_INIT_STRUCTURE_FROM_TEMPLATE(
+ opts, version, git_push_options, GIT_PUSH_OPTIONS_INIT);
+ return 0;
+}
+
+#ifndef GIT_DEPRECATE_HARD
+int git_push_init_options(git_push_options *opts, unsigned int version)
+{
+ return git_push_options_init(opts, version);
+}
+#endif
projects / libgit2.git / blobdiff