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https://github.com/git/git
synced 2024-10-30 04:01:21 +00:00
ae46d5fb98
"git merge-tree" has learned that the three trees involved in the 3-way merge only need to be trees, not necessarily commits. * js/merge-tree-3-trees: fill_tree_descriptor(): mark error message for translation cache-tree: avoid an unnecessary check Always check `parse_tree*()`'s return value t4301: verify that merge-tree fails on missing blob objects merge-ort: do check `parse_tree()`'s return value merge-tree: fail with a non-zero exit code on missing tree objects merge-tree: accept 3 trees as arguments
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
#include "git-compat-util.h"
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#include "gettext.h"
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#include "hash.h"
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#include "hex.h"
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#include "lockfile.h"
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#include "merge.h"
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#include "commit.h"
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#include "repository.h"
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#include "run-command.h"
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#include "resolve-undo.h"
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#include "tree.h"
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#include "tree-walk.h"
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#include "unpack-trees.h"
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static const char *merge_argument(struct commit *commit)
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{
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return oid_to_hex(commit ? &commit->object.oid : the_hash_algo->empty_tree);
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}
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int try_merge_command(struct repository *r,
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const char *strategy, size_t xopts_nr,
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const char **xopts, struct commit_list *common,
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const char *head_arg, struct commit_list *remotes)
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{
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struct child_process cmd = CHILD_PROCESS_INIT;
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int i, ret;
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struct commit_list *j;
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strvec_pushf(&cmd.args, "merge-%s", strategy);
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for (i = 0; i < xopts_nr; i++)
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strvec_pushf(&cmd.args, "--%s", xopts[i]);
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for (j = common; j; j = j->next)
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strvec_push(&cmd.args, merge_argument(j->item));
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strvec_push(&cmd.args, "--");
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strvec_push(&cmd.args, head_arg);
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for (j = remotes; j; j = j->next)
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strvec_push(&cmd.args, merge_argument(j->item));
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cmd.git_cmd = 1;
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ret = run_command(&cmd);
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discard_index(r->index);
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if (repo_read_index(r) < 0)
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die(_("failed to read the cache"));
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resolve_undo_clear_index(r->index);
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return ret;
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}
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int checkout_fast_forward(struct repository *r,
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const struct object_id *head,
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const struct object_id *remote,
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int overwrite_ignore)
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{
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struct tree *trees[MAX_UNPACK_TREES];
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struct unpack_trees_options opts;
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struct tree_desc t[MAX_UNPACK_TREES];
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int i, nr_trees = 0;
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struct lock_file lock_file = LOCK_INIT;
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refresh_index(r->index, REFRESH_QUIET, NULL, NULL, NULL);
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if (repo_hold_locked_index(r, &lock_file, LOCK_REPORT_ON_ERROR) < 0)
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return -1;
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memset(&trees, 0, sizeof(trees));
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memset(&t, 0, sizeof(t));
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trees[nr_trees] = parse_tree_indirect(head);
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if (!trees[nr_trees++]) {
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rollback_lock_file(&lock_file);
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return -1;
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}
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trees[nr_trees] = parse_tree_indirect(remote);
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if (!trees[nr_trees++]) {
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rollback_lock_file(&lock_file);
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return -1;
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}
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for (i = 0; i < nr_trees; i++) {
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if (parse_tree(trees[i]) < 0) {
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rollback_lock_file(&lock_file);
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return -1;
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}
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init_tree_desc(t+i, trees[i]->buffer, trees[i]->size);
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}
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memset(&opts, 0, sizeof(opts));
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opts.preserve_ignored = !overwrite_ignore;
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opts.head_idx = 1;
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opts.src_index = r->index;
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opts.dst_index = r->index;
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opts.update = 1;
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opts.verbose_update = 1;
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opts.merge = 1;
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opts.fn = twoway_merge;
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init_checkout_metadata(&opts.meta, NULL, remote, NULL);
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setup_unpack_trees_porcelain(&opts, "merge");
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if (unpack_trees(nr_trees, t, &opts)) {
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rollback_lock_file(&lock_file);
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clear_unpack_trees_porcelain(&opts);
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return -1;
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}
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clear_unpack_trees_porcelain(&opts);
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if (write_locked_index(r->index, &lock_file, COMMIT_LOCK))
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return error(_("unable to write new index file"));
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return 0;
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}
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