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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"
#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->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;
p->pb_parallelism = 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;
}
int git_push_set_options(git_push *push, const git_push_options *opts)
{
if (!push || !opts)
return -1;
GITERR_CHECK_VERSION(opts, GIT_PUSH_OPTIONS_VERSION, "git_push_options");
push->pb_parallelism = opts->pb_parallelism;
return 0;
}
int git_push_set_callbacks(
git_push *push,
git_packbuilder_progress pack_progress_cb,
void *pack_progress_cb_payload,
git_push_transfer_progress transfer_progress_cb,
void *transfer_progress_cb_payload)
{
if (!push)
return -1;
push->pack_progress_cb = pack_progress_cb;
push->pack_progress_cb_payload = pack_progress_cb_payload;
push->transfer_progress_cb = transfer_progress_cb;
push->transfer_progress_cb_payload = transfer_progress_cb_payload;
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 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);
git_object_free(obj);
if (!error)
return 0;
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;
}
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,
const git_signature *signature,
const char *reflog_message)
{
git_buf remote_ref_name = GIT_BUF_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) {
/* If this ref update was successful (ok, not ng), it will have an empty message */
if (status->msg)
continue;
/* Find the corresponding remote ref */
fetch_spec = git_remote__matching_refspec(push->remote, status->ref);
if (!fetch_spec)
continue;
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->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) {
git_reference_free(remote_ref);
goto on_error;
}
git_reference_free(remote_ref);
} 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, signature,
reflog_message ? reflog_message : "update by push")) < 0)
goto on_error;
}
error = 0;
on_error:
git_buf_free(&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_OBJ_TAG)) < 0)
return error;
while (git_object_type(obj) == GIT_OBJ_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 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_object *target;
if ((error = enqueue_tag(&target, push, &spec->loid)) < 0)
goto on_error;
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_set(GITERR_REFERENCE, "Cannot push missing reference");
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_set(GITERR_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_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);
if (!o) {
error = -1;
goto on_error;
}
git_oid_cpy(o, &oid);
if ((error = git_vector_insert(commits, o)) < 0)
goto on_error;
}
on_error:
git_revwalk_free(rw);
return error == GIT_ITEROVER ? 0 : error;
}
static int enqueue_object(
const git_tree_entry *entry,
git_packbuilder *pb)
{
switch (git_tree_entry_type(entry)) {
case GIT_OBJ_COMMIT:
return 0;
case GIT_OBJ_TREE:
return git_packbuilder_insert_tree(pb, &entry->oid);
default:
return git_packbuilder_insert(pb, &entry->oid, entry->filename);
}
}
static int queue_differences(
git_tree *base,
git_tree *delta,
git_packbuilder *pb)
{
git_tree *b_child = NULL, *d_child = NULL;
size_t b_length = git_tree_entrycount(base);
size_t d_length = git_tree_entrycount(delta);
size_t i = 0, j = 0;
int error;
while (i < b_length && j < d_length) {
const git_tree_entry *b_entry = git_tree_entry_byindex(base, i);
const git_tree_entry *d_entry = git_tree_entry_byindex(delta, j);
int cmp = 0;
if (!git_oid__cmp(&b_entry->oid, &d_entry->oid))
goto loop;
cmp = strcmp(b_entry->filename, d_entry->filename);
/* If the entries are both trees and they have the same name but are
* different, then we'll recurse after adding the right-hand entry */
if (!cmp &&
git_tree_entry__is_tree(b_entry) &&
git_tree_entry__is_tree(d_entry)) {
/* Add the right-hand entry */
if ((error = git_packbuilder_insert(pb, &d_entry->oid,
d_entry->filename)) < 0)
goto on_error;
/* Acquire the subtrees and recurse */
if ((error = git_tree_lookup(&b_child,
git_tree_owner(base), &b_entry->oid)) < 0 ||
(error = git_tree_lookup(&d_child,
git_tree_owner(delta), &d_entry->oid)) < 0 ||
(error = queue_differences(b_child, d_child, pb)) < 0)
goto on_error;
git_tree_free(b_child); b_child = NULL;
git_tree_free(d_child); d_child = NULL;
}
/* If the object is new or different in the right-hand tree,
* then enumerate it */
else if (cmp >= 0 &&
(error = enqueue_object(d_entry, pb)) < 0)
goto on_error;
loop:
if (cmp <= 0) i++;
if (cmp >= 0) j++;
}
/* Drain the right-hand tree of entries */
for (; j < d_length; j++)
if ((error = enqueue_object(git_tree_entry_byindex(delta, j), pb)) < 0)
goto on_error;
error = 0;
on_error:
if (b_child)
git_tree_free(b_child);
if (d_child)
git_tree_free(d_child);
return error;
}
static int queue_objects(git_push *push)
{
git_vector commits = GIT_VECTOR_INIT;
git_oid *oid;
size_t i;
unsigned j;
int error;
if ((error = revwalk(&commits, push)) < 0)
goto on_error;
git_vector_foreach(&commits, i, oid) {
git_commit *parent = NULL, *commit;
git_tree *tree = NULL, *ptree = NULL;
size_t parentcount;
if ((error = git_commit_lookup(&commit, push->repo, oid)) < 0)
goto on_error;
/* Insert the commit */
if ((error = git_packbuilder_insert(push->pb, oid, NULL)) < 0)
goto loop_error;
parentcount = git_commit_parentcount(commit);
if (!parentcount) {
if ((error = git_packbuilder_insert_tree(push->pb,
git_commit_tree_id(commit))) < 0)
goto loop_error;
} else {
if ((error = git_tree_lookup(&tree, push->repo,
git_commit_tree_id(commit))) < 0 ||
(error = git_packbuilder_insert(push->pb,
git_commit_tree_id(commit), NULL)) < 0)
goto loop_error;
/* For each parent, add the items which are different */
for (j = 0; j < parentcount; j++) {
if ((error = git_commit_parent(&parent, commit, j)) < 0 ||
(error = git_commit_tree(&ptree, parent)) < 0 ||
(error = queue_differences(ptree, tree, push->pb)) < 0)
goto loop_error;
git_tree_free(ptree); ptree = NULL;
git_commit_free(parent); parent = NULL;
}
}
error = 0;
loop_error:
if (tree)
git_tree_free(tree);
if (ptree)
git_tree_free(ptree);
if (parent)
git_commit_free(parent);
git_commit_free(commit);
if (error < 0)
goto on_error;
}
error = 0;
on_error:
git_vector_free_deep(&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(GITERR_REFERENCE, "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 = 0;
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)
goto on_error;
git_packbuilder_set_threads(push->pb, push->pb_parallelism);
if (push->pack_progress_cb)
if ((error = git_packbuilder_set_callbacks(push->pb, push->pack_progress_cb, push->pack_progress_cb_payload)) < 0)
goto on_error;
if ((error = calculate_work(push)) < 0 ||
(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) &&
(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(const 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) {
int error = cb(status->ref, status->msg, data);
if (error)
return giterr_set_after_callback(error);
}
return 0;
}
void git_push_status_free(push_status *status)
{
if (status == NULL)
return;
if (status->msg)
git__free(status->msg);
git__free(status->ref);
git__free(status);
}
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) {
git_push_status_free(status);
}
git_vector_free(&push->status);
git__free(push);
}
int git_push_init_options(git_push_options* opts, int version)
{
if (version != GIT_PUSH_OPTIONS_VERSION) {
giterr_set(GITERR_INVALID, "Invalid version %d for git_push_options", version);
return -1;
} else {
git_push_options o = GIT_PUSH_OPTIONS_INIT;
memcpy(opts, &o, sizeof(o));
return 0;
}
}
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