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/* foundry-git-tree.c
*
* Copyright 2025 Christian Hergert <chergert@redhat.com>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "foundry-git-autocleanups.h"
#include "foundry-git-diff-private.h"
#include "foundry-git-error.h"
#include "foundry-git-repository-paths-private.h"
#include "foundry-git-tree-private.h"
struct _FoundryGitTree
{
FoundryVcsTree parent_instance;
GMutex mutex;
git_tree *tree;
git_oid oid;
};
G_DEFINE_FINAL_TYPE (FoundryGitTree, foundry_git_tree, FOUNDRY_TYPE_VCS_TREE)
static char *
foundry_git_tree_dup_id (FoundryVcsTree *tree)
{
char str[GIT_OID_HEXSZ + 1];
git_oid_tostr (str, sizeof str, &FOUNDRY_GIT_TREE (tree)->oid);
return g_strdup (str);
}
static void
foundry_git_tree_finalize (GObject *object)
{
FoundryGitTree *self = (FoundryGitTree *)object;
g_clear_pointer (&self->tree, git_tree_free);
g_mutex_clear (&self->mutex);
G_OBJECT_CLASS (foundry_git_tree_parent_class)->finalize (object);
}
static void
foundry_git_tree_class_init (FoundryGitTreeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
FoundryVcsTreeClass *tree_class = FOUNDRY_VCS_TREE_CLASS (klass);
object_class->finalize = foundry_git_tree_finalize;
tree_class->dup_id = foundry_git_tree_dup_id;
}
static void
foundry_git_tree_init (FoundryGitTree *self)
{
g_mutex_init (&self->mutex);
}
FoundryGitTree *
_foundry_git_tree_new (git_tree *tree)
{
FoundryGitTree *self;
g_return_val_if_fail (tree != NULL, NULL);
self = g_object_new (FOUNDRY_TYPE_GIT_TREE, NULL);
self->oid = *git_tree_id (tree);
self->tree = g_steal_pointer (&tree);
return self;
}
typedef struct _Diff
{
FoundryGitRepositoryPaths *paths;
git_oid tree_a;
git_oid tree_b;
} Diff;
static void
diff_free (Diff *state)
{
g_clear_pointer (&state->paths, foundry_git_repository_paths_unref);
g_free (state);
}
static DexFuture *
foundry_git_tree_diff_thread (gpointer data)
{
Diff *state = data;
g_autoptr(git_repository) repository = NULL;
g_autoptr(git_tree) tree_a = NULL;
g_autoptr(git_tree) tree_b = NULL;
g_autoptr(git_diff) diff = NULL;
g_assert (state != NULL);
g_assert (state->paths != NULL);
if (!foundry_git_repository_paths_open (state->paths, &repository, NULL) ||
git_tree_lookup (&tree_a, repository, &state->tree_a) != 0 ||
git_tree_lookup (&tree_b, repository, &state->tree_b) != 0 ||
git_diff_tree_to_tree (&diff, repository, tree_a, tree_b, NULL) != 0)
return foundry_git_reject_last_error ();
return dex_future_new_take_object (_foundry_git_diff_new_with_paths (g_steal_pointer (&diff), state->paths));
}
DexFuture *
_foundry_git_tree_diff (FoundryGitTree *self,
FoundryGitTree *other,
FoundryGitRepositoryPaths *paths)
{
Diff *state;
dex_return_error_if_fail (FOUNDRY_IS_GIT_TREE (self));
dex_return_error_if_fail (FOUNDRY_IS_GIT_TREE (other));
dex_return_error_if_fail (paths != NULL);
/* TODO: we could trylock both self/other and avoid having to re-open
* the repository to avoid potential deadlocks.
*/
state = g_new0 (Diff, 1);
state->paths = foundry_git_repository_paths_ref (paths);
state->tree_a = self->oid;
state->tree_b = other->oid;
return dex_thread_spawn ("[git-tree-diff]",
foundry_git_tree_diff_thread,
state,
(GDestroyNotify) diff_free);
}
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