diff options
Diffstat (limited to 'third_party/git/merge-recursive.h')
| -rw-r--r-- | third_party/git/merge-recursive.h | 163 |
1 files changed, 91 insertions, 72 deletions
diff --git a/third_party/git/merge-recursive.h b/third_party/git/merge-recursive.h index c2b7bb65c6..0795a1d3ec 100644 --- a/third_party/git/merge-recursive.h +++ b/third_party/git/merge-recursive.h @@ -1,104 +1,123 @@ #ifndef MERGE_RECURSIVE_H #define MERGE_RECURSIVE_H -#include "string-list.h" -#include "unpack-trees.h" +#include "strbuf.h" struct commit; - +struct commit_list; +struct object_id; struct repository; +struct tree; +struct merge_options_internal; struct merge_options { + struct repository *repo; + + /* ref names used in console messages and conflict markers */ const char *ancestor; const char *branch1; const char *branch2; + + /* rename related options */ + int detect_renames; enum { - MERGE_RECURSIVE_NORMAL = 0, - MERGE_RECURSIVE_OURS, - MERGE_RECURSIVE_THEIRS + MERGE_DIRECTORY_RENAMES_NONE = 0, + MERGE_DIRECTORY_RENAMES_CONFLICT = 1, + MERGE_DIRECTORY_RENAMES_TRUE = 2 + } detect_directory_renames; + int rename_limit; + int rename_score; + int show_rename_progress; + + /* xdiff-related options (patience, ignore whitespace, ours/theirs) */ + long xdl_opts; + enum { + MERGE_VARIANT_NORMAL = 0, + MERGE_VARIANT_OURS, + MERGE_VARIANT_THEIRS } recursive_variant; - const char *subtree_shift; + + /* console output related options */ + int verbosity; unsigned buffer_output; /* 1: output at end, 2: keep buffered */ + struct strbuf obuf; /* output buffer; if buffer_output == 2, caller + * must handle and call strbuf_release */ + + /* miscellaneous control options */ + const char *subtree_shift; unsigned renormalize : 1; - long xdl_opts; - int verbosity; - int detect_directory_renames; - int diff_detect_rename; - int merge_detect_rename; - int diff_rename_limit; - int merge_rename_limit; - int rename_score; - int needed_rename_limit; - int show_rename_progress; - int call_depth; - struct strbuf obuf; - struct hashmap current_file_dir_set; - struct string_list df_conflict_file_set; - struct unpack_trees_options unpack_opts; - struct index_state orig_index; - struct repository *repo; + + /* internal fields used by the implementation */ + struct merge_options_internal *priv; }; +void init_merge_options(struct merge_options *opt, struct repository *repo); + +/* parse the option in s and update the relevant field of opt */ +int parse_merge_opt(struct merge_options *opt, const char *s); + /* - * For dir_rename_entry, directory names are stored as a full path from the - * toplevel of the repository and do not include a trailing '/'. Also: - * - * dir: original name of directory being renamed - * non_unique_new_dir: if true, could not determine new_dir - * new_dir: final name of directory being renamed - * possible_new_dirs: temporary used to help determine new_dir; see comments - * in get_directory_renames() for details + * RETURN VALUES: All the merge_* functions below return a value as follows: + * > 0 Merge was clean + * = 0 Merge had conflicts + * < 0 Merge hit an unexpected and unrecoverable problem (e.g. disk + * full) and aborted merge part-way through. */ -struct dir_rename_entry { - struct hashmap_entry ent; /* must be the first member! */ - char *dir; - unsigned non_unique_new_dir:1; - struct strbuf new_dir; - struct string_list possible_new_dirs; -}; - -struct collision_entry { - struct hashmap_entry ent; /* must be the first member! */ - char *target_file; - struct string_list source_files; - unsigned reported_already:1; -}; -static inline int merge_detect_rename(struct merge_options *o) -{ - return o->merge_detect_rename >= 0 ? o->merge_detect_rename : - o->diff_detect_rename >= 0 ? o->diff_detect_rename : 1; -} +/* + * rename-detecting three-way merge, no recursion. + * + * Outputs: + * - See RETURN VALUES above + * - opt->repo->index has the new index + * - new index NOT written to disk + * - The working tree is updated with results of the merge + */ +int merge_trees(struct merge_options *opt, + struct tree *head, + struct tree *merge, + struct tree *merge_base); -/* merge_trees() but with recursive ancestor consolidation */ -int merge_recursive(struct merge_options *o, +/* + * merge_recursive is like merge_trees() but with recursive ancestor + * consolidation. + * + * NOTE: empirically, about a decade ago it was determined that with more + * than two merge bases, optimal behavior was found when the + * merge_bases were passed in the order of oldest commit to newest + * commit. Also, merge_bases will be consumed (emptied) so make a + * copy if you need it. + * + * Outputs: + * - See RETURN VALUES above + * - *result is treated as scratch space for temporary recursive merges + * - opt->repo->index has the new index + * - new index NOT written to disk + * - The working tree is updated with results of the merge + */ +int merge_recursive(struct merge_options *opt, struct commit *h1, struct commit *h2, - struct commit_list *ancestors, + struct commit_list *merge_bases, struct commit **result); -/* rename-detecting three-way merge, no recursion */ -int merge_trees(struct merge_options *o, - struct tree *head, - struct tree *merge, - struct tree *common, - struct tree **result); - /* - * "git-merge-recursive" can be fed trees; wrap them into - * virtual commits and call merge_recursive() proper. + * merge_recursive_generic can operate on trees instead of commits, by + * wrapping the trees into virtual commits, and calling merge_recursive(). + * It also writes out the in-memory index to disk if the merge is successful. + * + * Outputs: + * - See RETURN VALUES above + * - *result is treated as scratch space for temporary recursive merges + * - opt->repo->index has the new index + * - new index also written to $GIT_INDEX_FILE on disk + * - The working tree is updated with results of the merge */ -int merge_recursive_generic(struct merge_options *o, +int merge_recursive_generic(struct merge_options *opt, const struct object_id *head, const struct object_id *merge, - int num_ca, - const struct object_id **ca, + int num_merge_bases, + const struct object_id **merge_bases, struct commit **result); -void init_merge_options(struct merge_options *o, - struct repository *repo); -struct tree *write_tree_from_memory(struct merge_options *o); - -int parse_merge_opt(struct merge_options *out, const char *s); - #endif |