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authorJunio C Hamano <gitster@pobox.com>2019-10-15 04:47:59 (GMT)
committerJunio C Hamano <gitster@pobox.com>2019-10-15 04:47:59 (GMT)
commit280bd445515acffb83231dfee79c21719ad3bc7b (patch)
tree170dbd8e836c6111200970d172743a531f5e7387
parent08da6496b61341ec45eac36afcc8f94242763468 (diff)
parentb6570477193b8cf75ce625b8d540e28f71ece3fe (diff)
downloadgit-280bd445515acffb83231dfee79c21719ad3bc7b.zip
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Merge branch 'en/merge-recursive-cleanup'
The merge-recursive machiery is one of the most complex parts of the system that accumulated cruft over time. This large series cleans up the implementation quite a bit. * en/merge-recursive-cleanup: (26 commits) merge-recursive: fix the fix to the diff3 common ancestor label merge-recursive: fix the diff3 common ancestor label for virtual commits merge-recursive: alphabetize include list merge-recursive: add sanity checks for relevant merge_options merge-recursive: rename MERGE_RECURSIVE_* to MERGE_VARIANT_* merge-recursive: split internal fields into a separate struct merge-recursive: avoid losing output and leaking memory holding that output merge-recursive: comment and reorder the merge_options fields merge-recursive: consolidate unnecessary fields in merge_options merge-recursive: move some definitions around to clean up the header merge-recursive: rename merge_options argument to opt in header merge-recursive: rename 'mrtree' to 'result_tree', for clarity merge-recursive: use common name for ancestors/common/base_list merge-recursive: fix some overly long lines cache-tree: share code between functions writing an index as a tree merge-recursive: don't force external callers to do our logging merge-recursive: remove useless parameter in merge_trees() merge-recursive: exit early if index != head Ensure index matches head before invoking merge machinery, round N merge-recursive: remove another implicit dependency on the_repository ...
-rw-r--r--builtin/am.c2
-rw-r--r--builtin/checkout.c14
-rw-r--r--builtin/merge-recursive.c4
-rw-r--r--builtin/stash.c2
-rw-r--r--cache-tree.c85
-rw-r--r--cache-tree.h3
-rw-r--r--merge-recursive.c572
-rw-r--r--merge-recursive.h164
-rw-r--r--sequencer.c5
-rwxr-xr-xt/t3030-merge-recursive.sh9
-rwxr-xr-xt/t6036-recursive-corner-cases.sh8
-rwxr-xr-xt/t6047-diff3-conflict-markers.sh202
12 files changed, 736 insertions, 334 deletions
diff --git a/builtin/am.c b/builtin/am.c
index 761cac3..8181c2a 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1526,7 +1526,7 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
o.branch1 = "HEAD";
their_tree_name = xstrfmt("%.*s", linelen(state->msg), state->msg);
o.branch2 = their_tree_name;
- o.detect_directory_renames = 0;
+ o.detect_directory_renames = MERGE_DIRECTORY_RENAMES_NONE;
if (state->quiet)
o.verbosity = 0;
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 1283727..3634a3d 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -709,11 +709,11 @@ static int merge_working_tree(const struct checkout_opts *opts,
* give up or do a real merge, depending on
* whether the merge flag was used.
*/
- struct tree *result;
struct tree *work;
struct tree *old_tree;
struct merge_options o;
struct strbuf sb = STRBUF_INIT;
+ struct strbuf old_commit_shortname = STRBUF_INIT;
if (!opts->merge)
return 1;
@@ -754,7 +754,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
*/
init_merge_options(&o, the_repository);
o.verbosity = 0;
- work = write_tree_from_memory(&o);
+ work = write_in_core_index_as_tree(the_repository);
ret = reset_tree(new_tree,
opts, 1,
@@ -762,19 +762,25 @@ static int merge_working_tree(const struct checkout_opts *opts,
if (ret)
return ret;
o.ancestor = old_branch_info->name;
+ if (old_branch_info->name == NULL) {
+ strbuf_add_unique_abbrev(&old_commit_shortname,
+ &old_branch_info->commit->object.oid,
+ DEFAULT_ABBREV);
+ o.ancestor = old_commit_shortname.buf;
+ }
o.branch1 = new_branch_info->name;
o.branch2 = "local";
ret = merge_trees(&o,
new_tree,
work,
- old_tree,
- &result);
+ old_tree);
if (ret < 0)
exit(128);
ret = reset_tree(new_tree,
opts, 0,
writeout_error);
strbuf_release(&o.obuf);
+ strbuf_release(&old_commit_shortname);
if (ret)
return ret;
}
diff --git a/builtin/merge-recursive.c b/builtin/merge-recursive.c
index 5b910e3..a4bfd8f 100644
--- a/builtin/merge-recursive.c
+++ b/builtin/merge-recursive.c
@@ -1,3 +1,4 @@
+#include "cache.h"
#include "builtin.h"
#include "commit.h"
#include "tag.h"
@@ -63,6 +64,9 @@ int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
if (argc - i != 3) /* "--" "<head>" "<remote>" */
die(_("not handling anything other than two heads merge."));
+ if (repo_read_index_unmerged(the_repository))
+ die_resolve_conflict("merge");
+
o.branch1 = argv[++i];
o.branch2 = argv[++i];
diff --git a/builtin/stash.c b/builtin/stash.c
index 4fc44b3..bb4f6d8 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -427,6 +427,8 @@ static int do_apply_stash(const char *prefix, struct stash_info *info,
return error(_("could not save index tree"));
reset_head();
+ discard_cache();
+ read_cache();
}
}
diff --git a/cache-tree.c b/cache-tree.c
index 62edee4..1bd1b23 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -609,11 +609,66 @@ static struct cache_tree *cache_tree_find(struct cache_tree *it, const char *pat
return it;
}
+static int write_index_as_tree_internal(struct object_id *oid,
+ struct index_state *index_state,
+ int cache_tree_valid,
+ int flags,
+ const char *prefix)
+{
+ if (flags & WRITE_TREE_IGNORE_CACHE_TREE) {
+ cache_tree_free(&index_state->cache_tree);
+ cache_tree_valid = 0;
+ }
+
+ if (!index_state->cache_tree)
+ index_state->cache_tree = cache_tree();
+
+ if (!cache_tree_valid && cache_tree_update(index_state, flags) < 0)
+ return WRITE_TREE_UNMERGED_INDEX;
+
+ if (prefix) {
+ struct cache_tree *subtree;
+ subtree = cache_tree_find(index_state->cache_tree, prefix);
+ if (!subtree)
+ return WRITE_TREE_PREFIX_ERROR;
+ oidcpy(oid, &subtree->oid);
+ }
+ else
+ oidcpy(oid, &index_state->cache_tree->oid);
+
+ return 0;
+}
+
+struct tree* write_in_core_index_as_tree(struct repository *repo) {
+ struct object_id o;
+ int was_valid, ret;
+
+ struct index_state *index_state = repo->index;
+ was_valid = index_state->cache_tree &&
+ cache_tree_fully_valid(index_state->cache_tree);
+
+ ret = write_index_as_tree_internal(&o, index_state, was_valid, 0, NULL);
+ if (ret == WRITE_TREE_UNMERGED_INDEX) {
+ int i;
+ fprintf(stderr, "BUG: There are unmerged index entries:\n");
+ for (i = 0; i < index_state->cache_nr; i++) {
+ const struct cache_entry *ce = index_state->cache[i];
+ if (ce_stage(ce))
+ fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce),
+ (int)ce_namelen(ce), ce->name);
+ }
+ BUG("unmerged index entries when writing inmemory index");
+ }
+
+ return lookup_tree(repo, &index_state->cache_tree->oid);
+}
+
+
int write_index_as_tree(struct object_id *oid, struct index_state *index_state, const char *index_path, int flags, const char *prefix)
{
int entries, was_valid;
struct lock_file lock_file = LOCK_INIT;
- int ret = 0;
+ int ret;
hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR);
@@ -622,18 +677,14 @@ int write_index_as_tree(struct object_id *oid, struct index_state *index_state,
ret = WRITE_TREE_UNREADABLE_INDEX;
goto out;
}
- if (flags & WRITE_TREE_IGNORE_CACHE_TREE)
- cache_tree_free(&index_state->cache_tree);
- if (!index_state->cache_tree)
- index_state->cache_tree = cache_tree();
+ was_valid = !(flags & WRITE_TREE_IGNORE_CACHE_TREE) &&
+ index_state->cache_tree &&
+ cache_tree_fully_valid(index_state->cache_tree);
- was_valid = cache_tree_fully_valid(index_state->cache_tree);
- if (!was_valid) {
- if (cache_tree_update(index_state, flags) < 0) {
- ret = WRITE_TREE_UNMERGED_INDEX;
- goto out;
- }
+ ret = write_index_as_tree_internal(oid, index_state, was_valid, flags,
+ prefix);
+ if (!ret && !was_valid) {
write_locked_index(index_state, &lock_file, COMMIT_LOCK);
/* Not being able to write is fine -- we are only interested
* in updating the cache-tree part, and if the next caller
@@ -643,18 +694,6 @@ int write_index_as_tree(struct object_id *oid, struct index_state *index_state,
*/
}
- if (prefix) {
- struct cache_tree *subtree;
- subtree = cache_tree_find(index_state->cache_tree, prefix);
- if (!subtree) {
- ret = WRITE_TREE_PREFIX_ERROR;
- goto out;
- }
- oidcpy(oid, &subtree->oid);
- }
- else
- oidcpy(oid, &index_state->cache_tree->oid);
-
out:
rollback_lock_file(&lock_file);
return ret;
diff --git a/cache-tree.h b/cache-tree.h
index 757bbc4..639bfa5 100644
--- a/cache-tree.h
+++ b/cache-tree.h
@@ -34,7 +34,7 @@ int cache_tree_fully_valid(struct cache_tree *);
int cache_tree_update(struct index_state *, int);
void cache_tree_verify(struct repository *, struct index_state *);
-/* bitmasks to write_cache_as_tree flags */
+/* bitmasks to write_index_as_tree flags */
#define WRITE_TREE_MISSING_OK 1
#define WRITE_TREE_IGNORE_CACHE_TREE 2
#define WRITE_TREE_DRY_RUN 4
@@ -46,6 +46,7 @@ void cache_tree_verify(struct repository *, struct index_state *);
#define WRITE_TREE_UNMERGED_INDEX (-2)
#define WRITE_TREE_PREFIX_ERROR (-3)
+struct tree* write_in_core_index_as_tree(struct repository *repo);
int write_index_as_tree(struct object_id *oid, struct index_state *index_state, const char *index_path, int flags, const char *prefix);
void prime_cache_tree(struct repository *, struct index_state *, struct tree *);
diff --git a/merge-recursive.c b/merge-recursive.c
index 22a12cf..e86571c 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -4,30 +4,40 @@
* The thieves were Alex Riesen and Johannes Schindelin, in June/July 2006
*/
#include "cache.h"
-#include "config.h"
+#include "merge-recursive.h"
+
#include "advice.h"
-#include "lockfile.h"
-#include "cache-tree.h"
-#include "object-store.h"
-#include "repository.h"
-#include "commit.h"
+#include "alloc.h"
+#include "attr.h"
#include "blob.h"
#include "builtin.h"
-#include "tree-walk.h"
+#include "cache-tree.h"
+#include "commit.h"
+#include "commit-reach.h"
+#include "config.h"
#include "diff.h"
#include "diffcore.h"
+#include "dir.h"
+#include "ll-merge.h"
+#include "lockfile.h"
+#include "object-store.h"
+#include "repository.h"
+#include "revision.h"
+#include "string-list.h"
+#include "submodule.h"
#include "tag.h"
-#include "alloc.h"
+#include "tree-walk.h"
#include "unpack-trees.h"
-#include "string-list.h"
#include "xdiff-interface.h"
-#include "ll-merge.h"
-#include "attr.h"
-#include "merge-recursive.h"
-#include "dir.h"
-#include "submodule.h"
-#include "revision.h"
-#include "commit-reach.h"
+
+struct merge_options_internal {
+ int call_depth;
+ int needed_rename_limit;
+ 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 path_hashmap_entry {
struct hashmap_entry e;
@@ -54,6 +64,24 @@ static unsigned int path_hash(const char *path)
return ignore_case ? strihash(path) : strhash(path);
}
+/*
+ * 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
+ */
+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;
+};
+
static struct dir_rename_entry *dir_rename_find_entry(struct hashmap *hashmap,
char *dir)
{
@@ -92,6 +120,13 @@ static void dir_rename_entry_init(struct dir_rename_entry *entry,
string_list_init(&entry->possible_new_dirs, 0);
}
+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 struct collision_entry *collision_find_entry(struct hashmap *hashmap,
char *target_file)
{
@@ -284,7 +319,8 @@ static inline void setup_rename_conflict_info(enum rename_type rename_type,
static int show(struct merge_options *opt, int v)
{
- return (!opt->call_depth && opt->verbosity >= v) || opt->verbosity >= 5;
+ return (!opt->priv->call_depth && opt->verbosity >= v) ||
+ opt->verbosity >= 5;
}
__attribute__((format (printf, 3, 4)))
@@ -295,7 +331,7 @@ static void output(struct merge_options *opt, int v, const char *fmt, ...)
if (!show(opt, v))
return;
- strbuf_addchars(&opt->obuf, ' ', opt->call_depth * 2);
+ strbuf_addchars(&opt->obuf, ' ', opt->priv->call_depth * 2);
va_start(ap, fmt);
strbuf_vaddf(&opt->obuf, fmt, ap);
@@ -310,7 +346,7 @@ static void output_commit_title(struct merge_options *opt, struct commit *commit
{
struct merge_remote_desc *desc;
- strbuf_addchars(&opt->obuf, ' ', opt->call_depth * 2);
+ strbuf_addchars(&opt->obuf, ' ', opt->priv->call_depth * 2);
desc = merge_remote_util(commit);
if (desc)
strbuf_addf(&opt->obuf, "virtual %s\n", desc->name);
@@ -358,6 +394,11 @@ static int add_cacheinfo(struct merge_options *opt,
return ret;
}
+static inline int merge_detect_rename(struct merge_options *opt)
+{
+ return (opt->detect_renames >= 0) ? opt->detect_renames : 1;
+}
+
static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
{
parse_tree(tree);
@@ -373,74 +414,43 @@ static int unpack_trees_start(struct merge_options *opt,
struct tree_desc t[3];
struct index_state tmp_index = { NULL };
- memset(&opt->unpack_opts, 0, sizeof(opt->unpack_opts));
- if (opt->call_depth)
- opt->unpack_opts.index_only = 1;
+ memset(&opt->priv->unpack_opts, 0, sizeof(opt->priv->unpack_opts));
+ if (opt->priv->call_depth)
+ opt->priv->unpack_opts.index_only = 1;
else
- opt->unpack_opts.update = 1;
- opt->unpack_opts.merge = 1;
- opt->unpack_opts.head_idx = 2;
- opt->unpack_opts.fn = threeway_merge;
- opt->unpack_opts.src_index = opt->repo->index;
- opt->unpack_opts.dst_index = &tmp_index;
- opt->unpack_opts.aggressive = !merge_detect_rename(opt);
- setup_unpack_trees_porcelain(&opt->unpack_opts, "merge");
+ opt->priv->unpack_opts.update = 1;
+ opt->priv->unpack_opts.merge = 1;
+ opt->priv->unpack_opts.head_idx = 2;
+ opt->priv->unpack_opts.fn = threeway_merge;
+ opt->priv->unpack_opts.src_index = opt->repo->index;
+ opt->priv->unpack_opts.dst_index = &tmp_index;
+ opt->priv->unpack_opts.aggressive = !merge_detect_rename(opt);
+ setup_unpack_trees_porcelain(&opt->priv->unpack_opts, "merge");
init_tree_desc_from_tree(t+0, common);
init_tree_desc_from_tree(t+1, head);
init_tree_desc_from_tree(t+2, merge);
- rc = unpack_trees(3, t, &opt->unpack_opts);
+ rc = unpack_trees(3, t, &opt->priv->unpack_opts);
cache_tree_free(&opt->repo->index->cache_tree);
/*
- * Update opt->repo->index to match the new results, AFTER saving a copy
- * in opt->orig_index. Update src_index to point to the saved copy.
- * (verify_uptodate() checks src_index, and the original index is
- * the one that had the necessary modification timestamps.)
+ * Update opt->repo->index to match the new results, AFTER saving a
+ * copy in opt->priv->orig_index. Update src_index to point to the
+ * saved copy. (verify_uptodate() checks src_index, and the original
+ * index is the one that had the necessary modification timestamps.)
*/
- opt->orig_index = *opt->repo->index;
+ opt->priv->orig_index = *opt->repo->index;
*opt->repo->index = tmp_index;
- opt->unpack_opts.src_index = &opt->orig_index;
+ opt->priv->unpack_opts.src_index = &opt->priv->orig_index;
return rc;
}
static void unpack_trees_finish(struct merge_options *opt)
{
- discard_index(&opt->orig_index);
- clear_unpack_trees_porcelain(&opt->unpack_opts);
-}
-
-struct tree *write_tree_from_memory(struct merge_options *opt)
-{
- struct tree *result = NULL;
- struct index_state *istate = opt->repo->index;
-
- if (unmerged_index(istate)) {
- int i;
- fprintf(stderr, "BUG: There are unmerged index entries:\n");
- for (i = 0; i < istate->cache_nr; i++) {
- const struct cache_entry *ce = istate->cache[i];
- if (ce_stage(ce))
- fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce),
- (int)ce_namelen(ce), ce->name);
- }
- BUG("unmerged index entries in merge-recursive.c");
- }
-
- if (!istate->cache_tree)
- istate->cache_tree = cache_tree();
-
- if (!cache_tree_fully_valid(istate->cache_tree) &&
- cache_tree_update(istate, 0) < 0) {
- err(opt, _("error building trees"));
- return NULL;
- }
-
- result = lookup_tree(opt->repo, &istate->cache_tree->oid);
-
- return result;
+ discard_index(&opt->priv->orig_index);
+ clear_unpack_trees_porcelain(&opt->priv->unpack_opts);
}
static int save_files_dirs(const struct object_id *oid,
@@ -455,7 +465,7 @@ static int save_files_dirs(const struct object_id *oid,
FLEX_ALLOC_MEM(entry, path, base->buf, base->len);
hashmap_entry_init(entry, path_hash(entry->path));
- hashmap_add(&opt->current_file_dir_set, entry);
+ hashmap_add(&opt->priv->current_file_dir_set, entry);
strbuf_setlen(base, baselen);
return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
@@ -586,7 +596,7 @@ static void record_df_conflict_files(struct merge_options *opt,
* If we're merging merge-bases, we don't want to bother with
* any working directory changes.
*/
- if (opt->call_depth)
+ if (opt->priv->call_depth)
return;
/* Ensure D/F conflicts are adjacent in the entries list. */
@@ -598,7 +608,7 @@ static void record_df_conflict_files(struct merge_options *opt,
df_sorted_entries.cmp = string_list_df_name_compare;
string_list_sort(&df_sorted_entries);
- string_list_clear(&opt->df_conflict_file_set, 1);
+ string_list_clear(&opt->priv->df_conflict_file_set, 1);
for (i = 0; i < df_sorted_entries.nr; i++) {
const char *path = df_sorted_entries.items[i].string;
int len = strlen(path);
@@ -614,7 +624,7 @@ static void record_df_conflict_files(struct merge_options *opt,
len > last_len &&
memcmp(path, last_file, last_len) == 0 &&
path[last_len] == '/') {
- string_list_insert(&opt->df_conflict_file_set, last_file);
+ string_list_insert(&opt->priv->df_conflict_file_set, last_file);
}
/*
@@ -681,8 +691,8 @@ static void update_entry(struct stage_data *entry,
static int remove_file(struct merge_options *opt, int clean,
const char *path, int no_wd)
{
- int update_cache = opt->call_depth || clean;
- int update_working_directory = !opt->call_depth && !no_wd;
+ int update_cache = opt->priv->call_depth || clean;
+ int update_working_directory = !opt->priv->call_depth && !no_wd;
if (update_cache) {
if (remove_file_from_index(opt->repo->index, path))
@@ -712,7 +722,9 @@ static void add_flattened_path(struct strbuf *out, const char *s)
out->buf[i] = '_';
}
-static char *unique_path(struct merge_options *opt, const char *path, const char *branch)
+static char *unique_path(struct merge_options *opt,
+ const char *path,
+ const char *branch)
{
struct path_hashmap_entry *entry;
struct strbuf newpath = STRBUF_INIT;
@@ -723,16 +735,16 @@ static char *unique_path(struct merge_options *opt, const char *path, const char
add_flattened_path(&newpath, branch);
base_len = newpath.len;
- while (hashmap_get_from_hash(&opt->current_file_dir_set,
+ while (hashmap_get_from_hash(&opt->priv->current_file_dir_set,
path_hash(newpath.buf), newpath.buf) ||
- (!opt->call_depth && file_exists(newpath.buf))) {
+ (!opt->priv->call_depth && file_exists(newpath.buf))) {
strbuf_setlen(&newpath, base_len);
strbuf_addf(&newpath, "_%d", suffix++);
}
FLEX_ALLOC_MEM(entry, path, newpath.buf, newpath.len);
hashmap_entry_init(entry, path_hash(entry->path));
- hashmap_add(&opt->current_file_dir_set, entry);
+ hashmap_add(&opt->priv->current_file_dir_set, entry);
return strbuf_detach(&newpath, NULL);
}
@@ -775,7 +787,7 @@ static int dir_in_way(struct index_state *istate, const char *path,
static int was_tracked_and_matches(struct merge_options *opt, const char *path,
const struct diff_filespec *blob)
{
- int pos = index_name_pos(&opt->orig_index, path, strlen(path));
+ int pos = index_name_pos(&opt->priv->orig_index, path, strlen(path));
struct cache_entry *ce;
if (0 > pos)
@@ -783,7 +795,7 @@ static int was_tracked_and_matches(struct merge_options *opt, const char *path,
return 0;
/* See if the file we were tracking before matches */
- ce = opt->orig_index.cache[pos];
+ ce = opt->priv->orig_index.cache[pos];
return (oid_eq(&ce->oid, &blob->oid) && ce->ce_mode == blob->mode);
}
@@ -792,7 +804,7 @@ static int was_tracked_and_matches(struct merge_options *opt, const char *path,
*/
static int was_tracked(struct merge_options *opt, const char *path)
{
- int pos = index_name_pos(&opt->orig_index, path, strlen(path));
+ int pos = index_name_pos(&opt->priv->orig_index, path, strlen(path));
if (0 <= pos)
/* we were tracking this path before the merge */
@@ -849,12 +861,12 @@ static int was_dirty(struct merge_options *opt, const char *path)
struct cache_entry *ce;
int dirty = 1;
- if (opt->call_depth || !was_tracked(opt, path))
+ if (opt->priv->call_depth || !was_tracked(opt, path))
return !dirty;
- ce = index_file_exists(opt->unpack_opts.src_index,
+ ce = index_file_exists(opt->priv->unpack_opts.src_index,
path, strlen(path), ignore_case);
- dirty = verify_uptodate(ce, &opt->unpack_opts) != 0;
+ dirty = verify_uptodate(ce, &opt->priv->unpack_opts) != 0;
return dirty;
}
@@ -864,8 +876,8 @@ static int make_room_for_path(struct merge_options *opt, const char *path)
const char *msg = _("failed to create path '%s'%s");
/* Unlink any D/F conflict files that are in the way */
- for (i = 0; i < opt->df_conflict_file_set.nr; i++) {
- const char *df_path = opt->df_conflict_file_set.items[i].string;
+ for (i = 0; i < opt->priv->df_conflict_file_set.nr; i++) {
+ const char *df_path = opt->priv->df_conflict_file_set.items[i].string;
size_t pathlen = strlen(path);
size_t df_pathlen = strlen(df_path);
if (df_pathlen < pathlen &&
@@ -875,7 +887,7 @@ static int make_room_for_path(struct merge_options *opt, const char *path)
_("Removing %s to make room for subdirectory\n"),
df_path);
unlink(df_path);
- unsorted_string_list_delete_item(&opt->df_conflict_file_set,
+ unsorted_string_list_delete_item(&opt->priv->df_conflict_file_set,
i, 0);
break;
}
@@ -916,7 +928,7 @@ static int update_file_flags(struct merge_options *opt,
{
int ret = 0;
- if (opt->call_depth)
+ if (opt->priv->call_depth)
update_wd = 0;
if (update_wd) {
@@ -935,9 +947,11 @@ static int update_file_flags(struct merge_options *opt,
}
buf = read_object_file(&contents->oid, &type, &size);
- if (!buf)
- return err(opt, _("cannot read object %s '%s'"),
- oid_to_hex(&contents->oid), path);
+ if (!buf) {
+ ret = err(opt, _("cannot read object %s '%s'"),
+ oid_to_hex(&contents->oid), path);
+ goto free_buf;
+ }
if (type != OBJ_BLOB) {
ret = err(opt, _("blob expected for %s '%s'"),
oid_to_hex(&contents->oid), path);
@@ -945,7 +959,8 @@ static int update_file_flags(struct merge_options *opt,
}
if (S_ISREG(contents->mode)) {
struct strbuf strbuf = STRBUF_INIT;
- if (convert_to_working_tree(opt->repo->index, path, buf, size, &strbuf)) {
+ if (convert_to_working_tree(opt->repo->index,
+ path, buf, size, &strbuf)) {
free(buf);
size = strbuf.len;
buf = strbuf_detach(&strbuf, NULL);
@@ -998,7 +1013,7 @@ static int update_file(struct merge_options *opt,
const char *path)
{
return update_file_flags(opt, contents, path,
- opt->call_depth || clean, !opt->call_depth);
+ opt->priv->call_depth || clean, !opt->priv->call_depth);
}
/* Low level file merging, update and removal */
@@ -1020,22 +1035,22 @@ static int merge_3way(struct merge_options *opt,
{
mmfile_t orig, src1, src2;
struct ll_merge_options ll_opts = {0};
- char *base_name, *name1, *name2;
+ char *base, *name1, *name2;
int merge_status;
ll_opts.renormalize = opt->renormalize;
ll_opts.extra_marker_size = extra_marker_size;
ll_opts.xdl_opts = opt->xdl_opts;
- if (opt->call_depth) {
+ if (opt->priv->call_depth) {
ll_opts.virtual_ancestor = 1;
ll_opts.variant = 0;
} else {
switch (opt->recursive_variant) {
- case MERGE_RECURSIVE_OURS:
+ case MERGE_VARIANT_OURS:
ll_opts.variant = XDL_MERGE_FAVOR_OURS;
break;
- case MERGE_RECURSIVE_THEIRS:
+ case MERGE_VARIANT_THEIRS:
ll_opts.variant = XDL_MERGE_FAVOR_THEIRS;
break;
default:
@@ -1044,16 +1059,13 @@ static int merge_3way(struct merge_options *opt,
}
}
- assert(a->path && b->path);
- if (strcmp(a->path, b->path) ||
- (opt->ancestor != NULL && strcmp(a->path, o->path) != 0)) {
- base_name = opt->ancestor == NULL ? NULL :
- mkpathdup("%s:%s", opt->ancestor, o->path);
+ assert(a->path && b->path && o->path && opt->ancestor);
+ if (strcmp(a->path, b->path) || strcmp(a->path, o->path) != 0) {
+ base = mkpathdup("%s:%s", opt->ancestor, o->path);
name1 = mkpathdup("%s:%s", branch1, a->path);
name2 = mkpathdup("%s:%s", branch2, b->path);
} else {
- base_name = opt->ancestor == NULL ? NULL :
- mkpathdup("%s", opt->ancestor);
+ base = mkpathdup("%s", opt->ancestor);
name1 = mkpathdup("%s", branch1);
name2 = mkpathdup("%s", branch2);
}
@@ -1062,11 +1074,11 @@ static int merge_3way(struct merge_options *opt,
read_mmblob(&src1, &a->oid);
read_mmblob(&src2, &b->oid);
- merge_status = ll_merge(result_buf, a->path, &orig, base_name,
+ merge_status = ll_merge(result_buf, a->path, &orig, base,
&src1, name1, &src2, name2,
opt->repo->index, &ll_opts);
- free(base_name);
+ free(base);
free(name1);
free(name2);
free(orig.ptr);
@@ -1161,7 +1173,7 @@ static int merge_submodule(struct merge_options *opt,
struct object_array merges;
int i;
- int search = !opt->call_depth;
+ int search = !opt->priv->call_depth;
/* store a in result in case we fail */
oidcpy(result, a);
@@ -1345,15 +1357,15 @@ static int merge_mode_and_contents(struct merge_options *opt,
&b->oid);
} else if (S_ISLNK(a->mode)) {
switch (opt->recursive_variant) {
- case MERGE_RECURSIVE_NORMAL:
+ case MERGE_VARIANT_NORMAL:
oidcpy(&result->blob.oid, &a->oid);
if (!oid_eq(&a->oid, &b->oid))
result->clean = 0;
break;
- case MERGE_RECURSIVE_OURS:
+ case MERGE_VARIANT_OURS:
oidcpy(&result->blob.oid, &a->oid);
break;
- case MERGE_RECURSIVE_THEIRS:
+ case MERGE_VARIANT_THEIRS:
oidcpy(&result->blob.oid, &b->oid);
break;
}
@@ -1379,10 +1391,11 @@ static int handle_rename_via_dir(struct merge_options *opt,
const struct rename *ren = ci->ren1;
const struct diff_filespec *dest = ren->pair->two;
char *file_path = dest->path;
- int mark_conflicted = (opt->detect_directory_renames == 1);
+ int mark_conflicted = (opt->detect_directory_renames ==
+ MERGE_DIRECTORY_RENAMES_CONFLICT);
assert(ren->dir_rename_original_dest);
- if (!opt->call_depth && would_lose_untracked(opt, dest->path)) {
+ if (!opt->priv->call_depth && would_lose_untracked(opt, dest->path)) {
mark_conflicted = 1;
file_path = unique_path(opt, dest->path, ren->branch);
output(opt, 1, _("Error: Refusing to lose untracked file at %s; "
@@ -1425,12 +1438,12 @@ static int handle_change_delete(struct merge_options *opt,
const char *update_path = path;
int ret = 0;
- if (dir_in_way(opt->repo->index, path, !opt->call_depth, 0) ||
- (!opt->call_depth && would_lose_untracked(opt, path))) {
+ if (dir_in_way(opt->repo->index, path, !opt->priv->call_depth, 0) ||
+ (!opt->priv->call_depth && would_lose_untracked(opt, path))) {
update_path = alt_path = unique_path(opt, path, change_branch);
}
- if (opt->call_depth) {
+ if (opt->priv->call_depth) {
/*
* We cannot arbitrarily accept either a_sha or b_sha as
* correct; since there is no true "middle point" between
@@ -1505,14 +1518,14 @@ static int handle_rename_delete(struct merge_options *opt,
opt->branch2 : opt->branch1);
if (handle_change_delete(opt,
- opt->call_depth ? orig->path : dest->path,
- opt->call_depth ? NULL : orig->path,
+ opt->priv->call_depth ? orig->path : dest->path,
+ opt->priv->call_depth ? NULL : orig->path,
orig, dest,
rename_branch, delete_branch,
_("rename"), _("renamed")))
return -1;
- if (opt->call_depth)
+ if (opt->priv->call_depth)
return remove_file_from_index(opt->repo->index, dest->path);
else
return update_stages(opt, dest->path, NULL,
@@ -1549,7 +1562,7 @@ static int handle_file_collision(struct merge_options *opt,
/*
* In the recursive case, we just opt to undo renames
*/
- if (opt->call_depth && (prev_path1 || prev_path2)) {
+ if (opt->priv->call_depth && (prev_path1 || prev_path2)) {
/* Put first file (a->oid, a->mode) in its original spot */
if (prev_path1) {
if (update_file(opt, 1, a, prev_path1))
@@ -1578,10 +1591,10 @@ static int handle_file_collision(struct merge_options *opt,
/* Remove rename sources if rename/add or rename/rename(2to1) */
if (prev_path1)
remove_file(opt, 1, prev_path1,
- opt->call_depth || would_lose_untracked(opt, prev_path1));
+ opt->priv->call_depth || would_lose_untracked(opt, prev_path1));
if (prev_path2)
remove_file(opt, 1, prev_path2,
- opt->call_depth || would_lose_untracked(opt, prev_path2));
+ opt->priv->call_depth || would_lose_untracked(opt, prev_path2));
/*
* Remove the collision path, if it wouldn't cause dirty contents
@@ -1623,12 +1636,12 @@ static int handle_file_collision(struct merge_options *opt,
null.mode = 0;
if (merge_mode_and_contents(opt, &null, a, b, collide_path,
- branch1, branch2, opt->call_depth * 2, &mfi))
+ branch1, branch2, opt->priv->call_depth * 2, &mfi))
return -1;
mfi.clean &= !alt_path;
if (update_file(opt, mfi.clean, &mfi.blob, update_path))
return -1;
- if (!mfi.clean && !opt->call_depth &&
+ if (!mfi.clean && !opt->priv->call_depth &&
update_stages(opt, collide_path, NULL, a, b))
return -1;
free(alt_path);
@@ -1668,7 +1681,7 @@ static int handle_rename_add(struct merge_options *opt,
&ci->ren1->src_entry->stages[other_stage],
prev_path_desc,
opt->branch1, opt->branch2,
- 1 + opt->call_depth * 2, &mfi))
+ 1 + opt->priv->call_depth * 2, &mfi))
return -1;
free(prev_path_desc);
@@ -1686,7 +1699,7 @@ static char *find_path_for_conflict(struct merge_options *opt,
const char *branch2)
{
char *new_path = NULL;
- if (dir_in_way(opt->repo->index, path, !opt->call_depth, 0)) {
+ if (dir_in_way(opt->repo->index, path, !opt->priv->call_depth, 0)) {
new_path = unique_path(opt, path, branch1);
output(opt, 1, _("%s is a directory in %s adding "
"as %s instead"),
@@ -1717,17 +1730,17 @@ static int handle_rename_rename_1to2(struct merge_options *opt,
"rename \"%s\"->\"%s\" in \"%s\"%s"),
o->path, a->path, ci->ren1->branch,
o->path, b->path, ci->ren2->branch,
- opt->call_depth ? _(" (left unresolved)") : "");
+ opt->priv->call_depth ? _(" (left unresolved)") : "");
path_desc = xstrfmt("%s and %s, both renamed from %s",
a->path, b->path, o->path);
if (merge_mode_and_contents(opt, o, a, b, path_desc,
ci->ren1->branch, ci->ren2->branch,
- opt->call_depth * 2, &mfi))
+ opt->priv->call_depth * 2, &mfi))
return -1;
free(path_desc);
- if (opt->call_depth) {
+ if (opt->priv->call_depth) {
/*
* FIXME: For rename/add-source conflicts (if we could detect
* such), this is wrong. We should instead find a unique
@@ -1842,12 +1855,12 @@ static int handle_rename_rename_2to1(struct merge_options *opt,
&ci->ren1->src_entry->stages[ostage1],
path_side_1_desc,
opt->branch1, opt->branch2,
- 1 + opt->call_depth * 2, &mfi_c1) ||
+ 1 + opt->priv->call_depth * 2, &mfi_c1) ||
merge_mode_and_contents(opt, b,
&ci->ren2->src_entry->stages[ostage2],
c2, path_side_2_desc,
opt->branch1, opt->branch2,
- 1 + opt->call_depth * 2, &mfi_c2))
+ 1 + opt->priv->call_depth * 2, &mfi_c2))
return -1;
free(path_side_1_desc);
free(path_side_2_desc);
@@ -1881,17 +1894,15 @@ static struct diff_queue_struct *get_diffpairs(struct merge_options *opt,
*/
if (opts.detect_rename > DIFF_DETECT_RENAME)
opts.detect_rename = DIFF_DETECT_RENAME;
- opts.rename_limit = opt->merge_rename_limit >= 0 ? opt->merge_rename_limit :
- opt->diff_rename_limit >= 0 ? opt->diff_rename_limit :
- 1000;
+ opts.rename_limit = (opt->rename_limit >= 0) ? opt->rename_limit : 1000;
opts.rename_score = opt->rename_score;
opts.show_rename_progress = opt->show_rename_progress;
opts.output_format = DIFF_FORMAT_NO_OUTPUT;
diff_setup_done(&opts);
diff_tree_oid(&o_tree->object.oid, &tree->object.oid, "", &opts);
diffcore_std(&opts);
- if (opts.needed_rename_limit > opt->needed_rename_limit)
- opt->needed_rename_limit = opts.needed_rename_limit;
+ if (opts.needed_rename_limit > opt->priv->needed_rename_limit)
+ opt->priv->needed_rename_limit = opts.needed_rename_limit;
ret = xmalloc(sizeof(*ret));
*ret = diff_queued_diff;
@@ -2864,8 +2875,9 @@ static int detect_and_process_renames(struct merge_options *opt,
head_pairs = get_diffpairs(opt, common, head);
merge_pairs = get_diffpairs(opt, common, merge);
- if ((opt->detect_directory_renames == 2) ||
- (opt->detect_directory_renames == 1 && !opt->call_depth)) {
+ if ((opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_TRUE) ||
+ (opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_CONFLICT &&
+ !opt->priv->call_depth)) {
dir_re_head = get_directory_renames(head_pairs);
dir_re_merge = get_directory_renames(merge_pairs);
@@ -3022,13 +3034,13 @@ static int handle_content_merge(struct merge_file_info *mfi,
reason = _("add/add");
assert(o->path && a->path && b->path);
- if (ci && dir_in_way(opt->repo->index, path, !opt->call_depth,
+ if (ci && dir_in_way(opt->repo->index, path, !opt->priv->call_depth,
S_ISGITLINK(ci->ren1->pair->two->mode)))
df_conflict_remains = 1;
if (merge_mode_and_contents(opt, o, a, b, path,
opt->branch1, opt->branch2,
- opt->call_depth * 2, mfi))
+ opt->priv->call_depth * 2, mfi))
return -1;
/*
@@ -3044,7 +3056,7 @@ static int handle_content_merge(struct merge_file_info *mfi,
output(opt, 3, _("Skipped %s (merged same as existing)"), path);
if (add_cacheinfo(opt, &mfi->blob, path,
- 0, (!opt->call_depth && !is_dirty), 0))
+ 0, (!opt->priv->call_depth && !is_dirty), 0))
return -1;
/*
* However, add_cacheinfo() will delete the old cache entry
@@ -3052,8 +3064,8 @@ static int handle_content_merge(struct merge_file_info *mfi,
* flag to avoid making the file appear as if it were
* deleted by the user.
*/
- pos = index_name_pos(&opt->orig_index, path, strlen(path));
- ce = opt->orig_index.cache[pos];
+ pos = index_name_pos(&opt->priv->orig_index, path, strlen(path));
+ ce = opt->priv->orig_index.cache[pos];
if (ce_skip_worktree(ce)) {
pos = index_name_pos(opt->repo->index, path, strlen(path));
ce = opt->repo->index->cache[pos];
@@ -3074,7 +3086,7 @@ static int handle_content_merge(struct merge_file_info *mfi,
if (df_conflict_remains || is_dirty) {
char *new_path;
- if (opt->call_depth) {
+ if (opt->priv->call_depth) {
remove_file_from_index(opt->repo->index, path);
} else {
if (!mfi->clean) {
@@ -3123,7 +3135,8 @@ static int handle_rename_normal(struct merge_options *opt,
clean = handle_content_merge(&mfi, opt, path, was_dirty(opt, path),
o, a, b, ci);
- if (clean && opt->detect_directory_renames == 1 &&
+ if (clean &&
+ opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_CONFLICT &&
ren->dir_rename_original_dest) {
if (update_stages(opt, path,
NULL,
@@ -3168,12 +3181,12 @@ static int warn_about_dir_renamed_entries(struct merge_options *opt,
return clean;
/* Sanity checks */
- assert(opt->detect_directory_renames > 0);
+ assert(opt->detect_directory_renames > MERGE_DIRECTORY_RENAMES_NONE);
assert(ren->dir_rename_original_type == 'A' ||
ren->dir_rename_original_type == 'R');
/* Check whether to treat directory renames as a conflict */
- clean = (opt->detect_directory_renames == 2);
+ clean = (opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_TRUE);
is_add = (ren->dir_rename_original_type == 'A');
if (ren->dir_rename_original_type == 'A' && clean) {
@@ -3332,7 +3345,7 @@ static int process_entry(struct merge_options *opt,
conf = _("directory/file");
}
if (dir_in_way(opt->repo->index, path,
- !opt->call_depth && !S_ISGITLINK(a->mode),
+ !opt->priv->call_depth && !S_ISGITLINK(a->mode),
0)) {
char *new_path = unique_path(opt, path, add_branch);
clean_merge = 0;
@@ -3341,7 +3354,7 @@ static int process_entry(struct merge_options *opt,
conf, path, other_branch, path, new_path);
if (update_file(opt, 0, contents, new_path))
clean_merge = -1;
- else if (opt->call_depth)
+ else if (opt->priv->call_depth)
remove_file_from_index(opt->repo->index, path);
free(new_path);
} else {
@@ -3381,37 +3394,32 @@ static int process_entry(struct merge_options *opt,
return clean_merge;
}
-int merge_trees(struct merge_options *opt,
- struct tree *head,
- struct tree *merge,
- struct tree *common,
- struct tree **result)
+static int merge_trees_internal(struct merge_options *opt,
+ struct tree *head,
+ struct tree *merge,
+ struct tree *merge_base,
+ struct tree **result)
{
struct index_state *istate = opt->repo->index;
int code, clean;
- struct strbuf sb = STRBUF_INIT;
-
- if (!opt->call_depth && repo_index_has_changes(opt->repo, head, &sb)) {
- err(opt, _("Your local changes to the following files would be overwritten by merge:\n %s"),
- sb.buf);
- return -1;
- }
if (opt->subtree_shift) {
- merge = shift_tree_object(opt->repo, head, merge, opt->subtree_shift);
- common = shift_tree_object(opt->repo, head, common, opt->subtree_shift);
+ merge = shift_tree_object(opt->repo, head, merge,
+ opt->subtree_shift);
+ merge_base = shift_tree_object(opt->repo, head, merge_base,
+ opt->subtree_shift);
}
- if (oid_eq(&common->object.oid, &merge->object.oid)) {
+ if (oid_eq(&merge_base->object.oid, &merge->object.oid)) {
output(opt, 0, _("Already up to date!"));
*result = head;
return 1;
}
- code = unpack_trees_start(opt, common, head, merge);
+ code = unpack_trees_start(opt, merge_base, head, merge);
if (code != 0) {
- if (show(opt, 4) || opt->call_depth)
+ if (show(opt, 4) || opt->priv->call_depth)
err(opt, _("merging of trees %s and %s failed"),
oid_to_hex(&head->object.oid),
oid_to_hex(&merge->object.oid));
@@ -3430,12 +3438,13 @@ int merge_trees(struct merge_options *opt,
* opposed to decaring a local hashmap is for convenience
* so that we don't have to pass it to around.
*/
- hashmap_init(&opt->current_file_dir_set, path_hashmap_cmp, NULL, 512);
+ hashmap_init(&opt->priv->current_file_dir_set, path_hashmap_cmp,
+ NULL, 512);
get_files_dirs(opt, head);
get_files_dirs(opt, merge);
entries = get_unmerged(opt->repo->index);
- clean = detect_and_process_renames(opt, common, head, merge,
+ clean = detect_and_process_renames(opt, merge_base, head, merge,
entries, &re_info);
record_df_conflict_files(opt, entries);
if (clean < 0)
@@ -3466,7 +3475,7 @@ int merge_trees(struct merge_options *opt,
string_list_clear(entries, 1);
free(entries);
- hashmap_free(&opt->current_file_dir_set, 1);
+ hashmap_free(&opt->priv->current_file_dir_set, 1);
if (clean < 0) {
unpack_trees_finish(opt);
@@ -3478,7 +3487,8 @@ int merge_trees(struct merge_options *opt,
unpack_trees_finish(opt);
- if (opt->call_depth && !(*result = write_tree_from_memory(opt)))
+ if (opt->priv->call_depth &&
+ !(*result = write_in_core_index_as_tree(opt->repo)))
return -1;
return clean;
@@ -3499,16 +3509,18 @@ static struct commit_list *reverse_commit_list(struct commit_list *list)
* Merge the commits h1 and h2, return the resulting virtual
* commit object and a flag indicating the cleanness of the merge.
*/
-int merge_recursive(struct merge_options *opt,
- struct commit *h1,
- struct commit *h2,
- struct commit_list *ca,
- struct commit **result)
+static int merge_recursive_internal(struct merge_options *opt,
+ struct commit *h1,
+ struct commit *h2,
+ struct commit_list *merge_bases,
+ struct commit **result)
{
struct commit_list *iter;
- struct commit *merged_common_ancestors;
- struct tree *mrtree;
+ struct commit *merged_merge_bases;
+ struct tree *result_tree;
int clean;
+ const char *ancestor_name;
+ struct strbuf merge_base_abbrev = STRBUF_INIT;
if (show(opt, 4)) {
output(opt, 4, _("Merging:"));
@@ -3516,32 +3528,43 @@ int merge_recursive(struct merge_options *opt,
output_commit_title(opt, h2);
}
- if (!ca) {
- ca = get_merge_bases(h1, h2);
- ca = reverse_commit_list(ca);
+ if (!merge_bases) {
+ merge_bases = get_merge_bases(h1, h2);
+ merge_bases = reverse_commit_list(merge_bases);
}
if (show(opt, 5)) {
- unsigned cnt = commit_list_count(ca);
+ unsigned cnt = commit_list_count(merge_bases);
output(opt, 5, Q_("found %u common ancestor:",
"found %u common ancestors:", cnt), cnt);
- for (iter = ca; iter; iter = iter->next)
+ for (iter = merge_bases; iter; iter = iter->next)
output_commit_title(opt, iter->item);
}
- merged_common_ancestors = pop_commit(&ca);
- if (merged_common_ancestors == NULL) {
+ merged_merge_bases = pop_commit(&merge_bases);
+ if (merged_merge_bases == NULL) {
/* if there is no common ancestor, use an empty tree */
struct tree *tree;
tree = lookup_tree(opt->repo, opt->repo->hash_algo->empty_tree);
- merged_common_ancestors = make_virtual_commit(opt->repo, tree, "ancestor");
+ merged_merge_bases = make_virtual_commit(opt->repo, tree,
+ "ancestor");
+ ancestor_name = "empty tree";
+ } else if (opt->ancestor && !opt->priv->call_depth) {
+ ancestor_name = opt->ancestor;
+ } else if (merge_bases) {
+ ancestor_name = "merged common ancestors";
+ } else {
+ strbuf_add_unique_abbrev(&merge_base_abbrev,
+ &merged_merge_bases->object.oid,
+ DEFAULT_ABBREV);
+ ancestor_name = merge_base_abbrev.buf;
}
- for (iter = ca; iter; iter = iter->next) {
+ for (iter = merge_bases; iter; iter = iter->next) {
const char *saved_b1, *saved_b2;
- opt->call_depth++;
+ opt->priv->call_depth++;
/*
* When the merge fails, the result contains files
* with conflict markers. The cleanness flag is
@@ -3555,45 +3578,134 @@ int merge_recursive(struct merge_options *opt,
saved_b2 = opt->branch2;
opt->branch1 = "Temporary merge branch 1";
opt->branch2 = "Temporary merge branch 2";
- if (merge_recursive(opt, merged_common_ancestors, iter->item,
- NULL, &merged_common_ancestors) < 0)
+ if (merge_recursive_internal(opt, merged_merge_bases, iter->item,
+ NULL, &merged_merge_bases) < 0)
return -1;
opt->branch1 = saved_b1;
opt->branch2 = saved_b2;
- opt->call_depth--;
+ opt->priv->call_depth--;
- if (!merged_common_ancestors)
+ if (!merged_merge_bases)
return err(opt, _("merge returned no commit"));
}
discard_index(opt->repo->index);
- if (!opt->call_depth)
+ if (!opt->priv->call_depth)
repo_read_index(opt->repo);
- opt->ancestor = "merged common ancestors";
- clean = merge_trees(opt, get_commit_tree(h1), get_commit_tree(h2),
- get_commit_tree(merged_common_ancestors),
- &mrtree);
+ opt->ancestor = ancestor_name;
+ clean = merge_trees_internal(opt,
+ repo_get_commit_tree(opt->repo, h1),
+ repo_get_commit_tree(opt->repo, h2),
+ repo_get_commit_tree(opt->repo,
+ merged_merge_bases),
+ &result_tree);
+ strbuf_release(&merge_base_abbrev);
+ opt->ancestor = NULL; /* avoid accidental re-use of opt->ancestor */
if (clean < 0) {
flush_output(opt);
return clean;
}
- if (opt->call_depth) {
- *result = make_virtual_commit(opt->repo, mrtree, "merged tree");
+ if (opt->priv->call_depth) {
+ *result = make_virtual_commit(opt->repo, result_tree,
+ "merged tree");
commit_list_insert(h1, &(*result)->parents);
commit_list_insert(h2, &(*result)->parents->next);
}
+ return clean;
+}
+
+static int merge_start(struct merge_options *opt, struct tree *head)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ /* Sanity checks on opt */
+ assert(opt->repo);
+
+ assert(opt->branch1 && opt->branch2);
+
+ assert(opt->detect_renames >= -1 &&
+ opt->detect_renames <= DIFF_DETECT_COPY);
+ assert(opt->detect_directory_renames >= MERGE_DIRECTORY_RENAMES_NONE &&
+ opt->detect_directory_renames <= MERGE_DIRECTORY_RENAMES_TRUE);
+ assert(opt->rename_limit >= -1);
+ assert(opt->rename_score >= 0 && opt->rename_score <= MAX_SCORE);
+ assert(opt->show_rename_progress >= 0 && opt->show_rename_progress <= 1);
+
+ assert(opt->xdl_opts >= 0);
+ assert(opt->recursive_variant >= MERGE_VARIANT_NORMAL &&
+ opt->recursive_variant <= MERGE_VARIANT_THEIRS);
+
+ assert(opt->verbosity >= 0 && opt->verbosity <= 5);
+ assert(opt->buffer_output <= 2);
+ assert(opt->obuf.len == 0);
+
+ assert(opt->priv == NULL);
+
+ /* Sanity check on repo state; index must match head */
+ if (repo_index_has_changes(opt->repo, head, &sb)) {
+ err(opt, _("Your local changes to the following files would be overwritten by merge:\n %s"),
+ sb.buf);
+ strbuf_release(&sb);
+ return -1;
+ }
+
+ opt->priv = xcalloc(1, sizeof(*opt->priv));
+ string_list_init(&opt->priv->df_conflict_file_set, 1);
+ return 0;
+}
+
+static void merge_finalize(struct merge_options *opt)
+{
flush_output(opt);
- if (!opt->call_depth && opt->buffer_output < 2)
+ if (!opt->priv->call_depth && opt->buffer_output < 2)
strbuf_release(&opt->obuf);
if (show(opt, 2))
diff_warn_rename_limit("merge.renamelimit",
- opt->needed_rename_limit, 0);
+ opt->priv->needed_rename_limit, 0);
+ FREE_AND_NULL(opt->priv);
+}
+
+int merge_trees(struct merge_options *opt,
+ struct tree *head,
+ struct tree *merge,
+ struct tree *merge_base)
+{
+ int clean;
+ struct tree *ignored;
+
+ assert(opt->ancestor != NULL);
+
+ if (merge_start(opt, head))
+ return -1;
+ clean = merge_trees_internal(opt, head, merge, merge_base, &ignored);
+ merge_finalize(opt);
+
+ return clean;
+}
+
+int merge_recursive(struct merge_options *opt,
+ struct commit *h1,
+ struct commit *h2,
+ struct commit_list *merge_bases,
+ struct commit **result)
+{
+ int clean;
+
+ assert(opt->ancestor == NULL ||
+ !strcmp(opt->ancestor, "constructed merge base"));
+
+ if (merge_start(opt, repo_get_commit_tree(opt->repo, h1)))
+ return -1;
+ clean = merge_recursive_internal(opt, h1, h2, merge_bases, result);
+ merge_finalize(opt);
+
return clean;
}
-static struct commit *get_ref(struct repository *repo, const struct object_id *oid,
+static struct commit *get_ref(struct repository *repo,
+ const struct object_id *oid,
const char *name)
{
struct object *object;
@@ -3614,8 +3726,8 @@ static struct commit *get_ref(struct repository *repo, const struct object_id *o
int merge_recursive_generic(struct merge_options *opt,
const struct object_id *head,
const struct object_id *merge,
- int num_base_list,
- const struct object_id **base_list,
+ int num_merge_bases,
+ const struct object_id **merge_bases,
struct commit **result)
{
int clean;
@@ -3624,15 +3736,18 @@ int merge_recursive_generic(struct merge_options *opt,
struct commit *next_commit = get_ref(opt->repo, merge, opt->branch2);
struct commit_list *ca = NULL;
- if (base_list) {
+ if (merge_bases) {
int i;
- for (i = 0; i < num_base_list; ++i) {
+ for (i = 0; i < num_merge_bases; ++i) {
struct commit *base;
- if (!(base = get_ref(opt->repo, base_list[i], oid_to_hex(base_list[i]))))
+ if (!(base = get_ref(opt->repo, merge_bases[i],
+ oid_to_hex(merge_bases[i]))))
return err(opt, _("Could not parse object '%s'"),
- oid_to_hex(base_list[i]));
+ oid_to_hex(merge_bases[i]));
commit_list_insert(base, &ca);
}
+ if (num_merge_bases == 1)
+ opt->ancestor = "constructed merge base";
}
repo_hold_locked_index(opt->repo, &lock, LOCK_DIE_ON_ERROR);
@@ -3654,22 +3769,25 @@ static void merge_recursive_config(struct merge_options *opt)
{
char *value = NULL;
git_config_get_int("merge.verbosity", &opt->verbosity);
- git_config_get_int("diff.renamelimit", &opt->diff_rename_limit);
- git_config_get_int("merge.renamelimit", &opt->merge_rename_limit);
+ git_config_get_int("diff.renamelimit", &opt->rename_limit);
+ git_config_get_int("merge.renamelimit", &opt->rename_limit);
if (!git_config_get_string("diff.renames", &value)) {
- opt->diff_detect_rename = git_config_rename("diff.renames", value);
+ opt->detect_renames = git_config_rename("diff.renames", value);
free(value);
}
if (!git_config_get_string("merge.renames", &value)) {
- opt->merge_detect_rename = git_config_rename("merge.renames", value);
+ opt->detect_renames = git_config_rename("merge.renames", value);
free(value);
}
if (!git_config_get_string("merge.directoryrenames", &value)) {
int boolval = git_parse_maybe_bool(value);
if (0 <= boolval) {
- opt->detect_directory_renames = boolval ? 2 : 0;
+ opt->detect_directory_renames = boolval ?
+ MERGE_DIRECTORY_RENAMES_TRUE :
+ MERGE_DIRECTORY_RENAMES_NONE;
} else if (!strcasecmp(value, "conflict")) {
- opt->detect_directory_renames = 1;
+ opt->detect_directory_renames =
+ MERGE_DIRECTORY_RENAMES_CONFLICT;
} /* avoid erroring on values from future versions of git */
free(value);
}
@@ -3681,23 +3799,25 @@ void init_merge_options(struct merge_options *opt,
{
const char *merge_verbosity;
memset(opt, 0, sizeof(struct merge_options));
+
opt->repo = repo;
+
+ opt->detect_renames = -1;
+ opt->detect_directory_renames = MERGE_DIRECTORY_RENAMES_CONFLICT;
+ opt->rename_limit = -1;
+
opt->verbosity = 2;
opt->buffer_output = 1;
- opt->diff_rename_limit = -1;
- opt->merge_rename_limit = -1;
+ strbuf_init(&opt->obuf, 0);
+
opt->renormalize = 0;
- opt->diff_detect_rename = -1;
- opt->merge_detect_rename = -1;
- opt->detect_directory_renames = 1;
+
merge_recursive_config(opt);
merge_verbosity = getenv("GIT_MERGE_VERBOSITY");
if (merge_verbosity)
opt->verbosity = strtol(merge_verbosity, NULL, 10);
if (opt->verbosity >= 5)
opt->buffer_output = 0;
- strbuf_init(&opt->obuf, 0);
- string_list_init(&opt->df_conflict_file_set, 1);
}
int parse_merge_opt(struct merge_options *opt, const char *s)
@@ -3707,9 +3827,9 @@ int parse_merge_opt(struct merge_options *opt, const char *s)
if (!s || !*s)
return -1;
if (!strcmp(s, "ours"))
- opt->recursive_variant = MERGE_RECURSIVE_OURS;
+ opt->recursive_variant = MERGE_VARIANT_OURS;
else if (!strcmp(s, "theirs"))
- opt->recursive_variant = MERGE_RECURSIVE_THEIRS;
+ opt->recursive_variant = MERGE_VARIANT_THEIRS;
else if (!strcmp(s, "subtree"))
opt->subtree_shift = "";
else if (skip_prefix(s, "subtree=", &arg))
@@ -3740,16 +3860,16 @@ int parse_merge_opt(struct merge_options *opt, const char *s)
else if (!strcmp(s, "no-renormalize"))
opt->renormalize = 0;
else if (!strcmp(s, "no-renames"))
- opt->merge_detect_rename = 0;
+ opt->detect_renames = 0;
else if (!strcmp(s, "find-renames")) {
- opt->merge_detect_rename = 1;
+ opt->detect_renames = 1;
opt->rename_score = 0;
}
else if (skip_prefix(s, "find-renames=", &arg) ||
skip_prefix(s, "rename-threshold=", &arg)) {
if ((opt->rename_score = parse_rename_score(&arg)) == -1 || *arg != 0)
return -1;
- opt->merge_detect_rename = 1;
+ opt->detect_renames = 1;
}
/*
* Please update $__git_merge_strategy_options in
diff --git a/merge-recursive.h b/merge-recursive.h
index c2b7bb6..978847e 100644
--- a/merge-recursive.h
+++ b/merge-recursive.h
@@ -1,104 +1,124 @@
#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
+ * - No commit is created
+ * - opt->repo->index has the new index
+ * - $GIT_INDEX_FILE is not updated
+ * - 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 and, if the commit is clean, creation of a commit.
+ *
+ * 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
+ * - If merge is clean, a commit is created and its address written to *result
+ * - opt->repo->index has the new index
+ * - $GIT_INDEX_FILE is not updated
+ * - 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
+ * - If merge is clean, a commit is created and its address written to *result
+ * - opt->repo->index has the new index
+ * - $GIT_INDEX_FILE is updated
+ * - 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
diff --git a/sequencer.c b/sequencer.c
index 501921e..5670bd7 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -586,7 +586,7 @@ static int do_recursive_merge(struct repository *r,
struct replay_opts *opts)
{
struct merge_options o;
- struct tree *result, *next_tree, *base_tree, *head_tree;
+ struct tree *next_tree, *base_tree, *head_tree;
int clean;
char **xopt;
struct lock_file index_lock = LOCK_INIT;
@@ -613,11 +613,10 @@ static int do_recursive_merge(struct repository *r,
clean = merge_trees(&o,
head_tree,
- next_tree, base_tree, &result);
+ next_tree, base_tree);
if (is_rebase_i(opts) && clean <= 0)
fputs(o.obuf.buf, stdout);
strbuf_release(&o.obuf);
- diff_warn_rename_limit("merge.renamelimit", o.needed_rename_limit, 0);
if (clean < 0) {
rollback_lock_file(&index_lock);
return clean;
diff --git a/t/t3030-merge-recursive.sh b/t/t3030-merge-recursive.sh
index faa8892..2170758 100755
--- a/t/t3030-merge-recursive.sh
+++ b/t/t3030-merge-recursive.sh
@@ -695,15 +695,22 @@ test_expect_success 'merging with triple rename across D/F conflict' '
test_expect_success 'merge-recursive remembers the names of all base trees' '
git reset --hard HEAD &&
+ # make the index match $c1 so that merge-recursive below does not
+ # fail early
+ git diff --binary HEAD $c1 -- | git apply --cached &&
+
# more trees than static slots used by oid_to_hex()
for commit in $c0 $c2 $c4 $c5 $c6 $c7
do
git rev-parse "$commit^{tree}"
done >trees &&
- # ignore the return code -- it only fails because the input is weird
+ # ignore the return code; it only fails because the input is weird...
test_must_fail git -c merge.verbosity=5 merge-recursive $(cat trees) -- $c1 $c3 >out &&
+ # ...but make sure it fails in the expected way
+ test_i18ngrep CONFLICT.*rename/rename out &&
+
# merge-recursive prints in reverse order, but we do not care
sort <trees >expect &&
sed -n "s/^virtual //p" out | sort >actual &&
diff --git a/t/t6036-recursive-corner-cases.sh b/t/t6036-recursive-corner-cases.sh
index d23b948..7fddcc8 100755
--- a/t/t6036-recursive-corner-cases.sh
+++ b/t/t6036-recursive-corner-cases.sh
@@ -1562,6 +1562,7 @@ test_expect_success 'check nested conflicts' '
cd nested_conflicts &&
git clean -f &&
+ MASTER=$(git rev-parse --short master) &&
git checkout L2^0 &&
# Merge must fail; there is a conflict
@@ -1582,7 +1583,7 @@ test_expect_success 'check nested conflicts' '
git cat-file -p R1:a >theirs &&
test_must_fail git merge-file --diff3 \
-L "Temporary merge branch 1" \
- -L "merged common ancestors" \
+ -L "$MASTER" \
-L "Temporary merge branch 2" \
ours \
base \
@@ -1594,7 +1595,7 @@ test_expect_success 'check nested conflicts' '
git cat-file -p R1:b >theirs &&
test_must_fail git merge-file --diff3 \
-L "Temporary merge branch 1" \
- -L "merged common ancestors" \
+ -L "$MASTER" \
-L "Temporary merge branch 2" \
ours \
base \
@@ -1732,6 +1733,7 @@ test_expect_success 'check virtual merge base with nested conflicts' '
(
cd virtual_merge_base_has_nested_conflicts &&
+ MASTER=$(git rev-parse --short master) &&
git checkout L3^0 &&
# Merge must fail; there is a conflict
@@ -1760,7 +1762,7 @@ test_expect_success 'check virtual merge base with nested conflicts' '
cp left merged-once &&
test_must_fail git merge-file --diff3 \
-L "Temporary merge branch 1" \
- -L "merged common ancestors" \
+ -L "$MASTER" \
-L "Temporary merge branch 2" \
merged-once \
base \
diff --git a/t/t6047-diff3-conflict-markers.sh b/t/t6047-diff3-conflict-markers.sh
new file mode 100755
index 0000000..860542a
--- /dev/null
+++ b/t/t6047-diff3-conflict-markers.sh
@@ -0,0 +1,202 @@
+#!/bin/sh
+
+test_description='recursive merge diff3 style conflict markers'
+
+. ./test-lib.sh
+
+# Setup:
+# L1
+# \
+# ?
+# /
+# R1
+#
+# Where:
+# L1 and R1 both have a file named 'content' but have no common history
+#
+
+test_expect_success 'setup no merge base' '
+ test_create_repo no_merge_base &&
+ (
+ cd no_merge_base &&
+
+ git checkout -b L &&
+ test_commit A content A &&
+
+ git checkout --orphan R &&
+ test_commit B content B
+ )
+'
+
+test_expect_success 'check no merge base' '
+ (
+ cd no_merge_base &&
+
+ git checkout L^0 &&
+
+ test_must_fail git -c merge.conflictstyle=diff3 merge --allow-unrelated-histories -s recursive R^0 &&
+
+ grep "|||||| empty tree" content
+ )
+'
+
+# Setup:
+# L1
+# / \
+# master ?
+# \ /
+# R1
+#
+# Where:
+# L1 and R1 have modified the same file ('content') in conflicting ways
+#
+
+test_expect_success 'setup unique merge base' '
+ test_create_repo unique_merge_base &&
+ (
+ cd unique_merge_base &&
+
+ test_commit base content "1
+2
+3
+4
+5
+" &&
+
+ git branch L &&
+ git branch R &&
+
+ git checkout L &&
+ test_commit L content "1
+2
+3
+4
+5
+7" &&
+
+ git checkout R &&
+ git rm content &&
+ test_commit R renamed "1
+2
+3
+4
+5
+six"
+ )
+'
+
+test_expect_success 'check unique merge base' '
+ (
+ cd unique_merge_base &&
+
+ git checkout L^0 &&
+ MASTER=$(git rev-parse --short master) &&
+
+ test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R^0 &&
+
+ grep "|||||| $MASTER:content" renamed
+ )
+'
+
+# Setup:
+# L1---L2--L3
+# / \ / \
+# master X1 ?
+# \ / \ /
+# R1---R2--R3
+#
+# Where:
+# commits L1 and R1 have modified the same file in non-conflicting ways
+# X1 is an auto-generated merge-base used when merging L1 and R1
+# commits L2 and R2 are merges of R1 and L1 into L1 and R1, respectively
+# commits L3 and R3 both modify 'content' in conflicting ways
+#
+
+test_expect_success 'setup multiple merge bases' '
+ test_create_repo multiple_merge_bases &&
+ (
+ cd multiple_merge_bases &&
+
+ test_commit initial content "1
+2
+3
+4
+5" &&
+
+ git branch L &&
+ git branch R &&
+
+ # Create L1
+ git checkout L &&
+ test_commit L1 content "0
+1
+2
+3
+4
+5" &&
+
+ # Create R1
+ git checkout R &&
+ test_commit R1 content "1
+2
+3
+4
+5
+6" &&
+
+ # Create L2
+ git checkout L &&
+ git merge R1 &&
+
+ # Create R2
+ git checkout R &&
+ git merge L1 &&
+
+ # Create L3
+ git checkout L &&
+ test_commit L3 content "0
+1
+2
+3
+4
+5
+A" &&
+
+ # Create R3
+ git checkout R &&
+ git rm content &&
+ test_commit R3 renamed "0
+2
+3
+4
+5
+six"
+ )
+'
+
+test_expect_success 'check multiple merge bases' '
+ (
+ cd multiple_merge_bases &&
+
+ git checkout L^0 &&
+
+ test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R^0 &&
+
+ grep "|||||| merged common ancestors:content" renamed
+ )
+'
+
+test_expect_success 'rebase describes fake ancestor base' '
+ test_create_repo rebase &&
+ (
+ cd rebase &&
+ test_commit base file &&
+ test_commit master file &&
+ git checkout -b side HEAD^ &&
+ test_commit side file &&
+ test_must_fail git -c merge.conflictstyle=diff3 rebase master &&
+ grep "||||||| constructed merge base" file
+ )
+'
+
+test_done