shift_tree_by(&one->object.oid, &two->object.oid, &shifted,
subtree_shift);
}
- if (!oidcmp(&two->object.oid, &shifted))
+ if (oideq(&two->object.oid, &shifted))
return two;
return lookup_tree(the_repository, &shifted);
}
{
if (!a && !b)
return 2;
- return a && b && oidcmp(a, b) == 0;
+ return a && b && oideq(a, b);
}
enum rename_type {
RENAME_NORMAL = 0,
RENAME_VIA_DIR,
+ RENAME_ADD,
RENAME_DELETE,
RENAME_ONE_FILE_TO_ONE,
RENAME_ONE_FILE_TO_TWO,
struct stage_data *src_entry1,
struct stage_data *src_entry2)
{
- struct rename_conflict_info *ci = xcalloc(1, sizeof(struct rename_conflict_info));
+ int ostage1 = 0, ostage2;
+ struct rename_conflict_info *ci;
+
+ /*
+ * When we have two renames involved, it's easiest to get the
+ * correct things into stage 2 and 3, and to make sure that the
+ * content merge puts HEAD before the other branch if we just
+ * ensure that branch1 == o->branch1. So, simply flip arguments
+ * around if we don't have that.
+ */
+ if (dst_entry2 && branch1 != o->branch1) {
+ setup_rename_conflict_info(rename_type,
+ pair2, pair1,
+ branch2, branch1,
+ dst_entry2, dst_entry1,
+ o,
+ src_entry2, src_entry1);
+ return;
+ }
+
+ ci = xcalloc(1, sizeof(struct rename_conflict_info));
ci->rename_type = rename_type;
ci->pair1 = pair1;
ci->branch1 = branch1;
dst_entry2->rename_conflict_info = ci;
}
- if (rename_type == RENAME_TWO_FILES_TO_ONE) {
- /*
- * For each rename, there could have been
- * modifications on the side of history where that
- * file was not renamed.
- */
- int ostage1 = o->branch1 == branch1 ? 3 : 2;
- int ostage2 = ostage1 ^ 1;
+ /*
+ * For each rename, there could have been
+ * modifications on the side of history where that
+ * file was not renamed.
+ */
+ if (rename_type == RENAME_ADD ||
+ rename_type == RENAME_TWO_FILES_TO_ONE) {
+ ostage1 = o->branch1 == branch1 ? 3 : 2;
ci->ren1_other.path = pair1->one->path;
oidcpy(&ci->ren1_other.oid, &src_entry1->stages[ostage1].oid);
ci->ren1_other.mode = src_entry1->stages[ostage1].mode;
+ }
+
+ if (rename_type == RENAME_TWO_FILES_TO_ONE) {
+ ostage2 = ostage1 ^ 1;
ci->ren2_other.path = pair2->one->path;
oidcpy(&ci->ren2_other.oid, &src_entry2->stages[ostage2].oid);
return 0;
}
-static int update_stages_for_stage_data(struct merge_options *opt,
- const char *path,
- const struct stage_data *stage_data)
-{
- struct diff_filespec o, a, b;
-
- o.mode = stage_data->stages[1].mode;
- oidcpy(&o.oid, &stage_data->stages[1].oid);
-
- a.mode = stage_data->stages[2].mode;
- oidcpy(&a.oid, &stage_data->stages[2].oid);
-
- b.mode = stage_data->stages[3].mode;
- oidcpy(&b.oid, &stage_data->stages[3].oid);
-
- return update_stages(opt, path,
- is_null_oid(&o.oid) ? NULL : &o,
- is_null_oid(&a.oid) ? NULL : &a,
- is_null_oid(&b.oid) ? NULL : &b);
-}
-
static void update_entry(struct stage_data *entry,
struct diff_filespec *o,
struct diff_filespec *a,
const struct diff_filespec *a,
const struct diff_filespec *b,
const char *branch1,
- const char *branch2)
+ const char *branch2,
+ const int extra_marker_size)
{
mmfile_t orig, src1, src2;
struct ll_merge_options ll_opts = {0};
int merge_status;
ll_opts.renormalize = o->renormalize;
+ ll_opts.extra_marker_size = extra_marker_size;
ll_opts.xdl_opts = o->xdl_opts;
if (o->call_depth) {
return 0;
}
-static int merge_file_1(struct merge_options *o,
- const struct diff_filespec *one,
- const struct diff_filespec *a,
- const struct diff_filespec *b,
- const char *filename,
- const char *branch1,
- const char *branch2,
- struct merge_file_info *result)
+static int merge_mode_and_contents(struct merge_options *o,
+ const struct diff_filespec *one,
+ const struct diff_filespec *a,
+ const struct diff_filespec *b,
+ const char *filename,
+ const char *branch1,
+ const char *branch2,
+ const int extra_marker_size,
+ struct merge_file_info *result)
{
+ if (o->branch1 != branch1) {
+ /*
+ * It's weird getting a reverse merge with HEAD on the bottom
+ * side of the conflict markers and the other branch on the
+ * top. Fix that.
+ */
+ return merge_mode_and_contents(o, one, b, a,
+ filename,
+ branch2, branch1,
+ extra_marker_size, result);
+ }
+
result->merge = 0;
result->clean = 1;
int ret = 0, merge_status;
merge_status = merge_3way(o, &result_buf, one, a, b,
- branch1, branch2);
+ branch1, branch2,
+ extra_marker_size);
if ((merge_status < 0) || !result_buf.ptr)
ret = err(o, _("Failed to execute internal merge"));
return 0;
}
-static int merge_file_special_markers(struct merge_options *o,
- const struct diff_filespec *one,
- const struct diff_filespec *a,
- const struct diff_filespec *b,
- const char *target_filename,
- const char *branch1,
- const char *filename1,
- const char *branch2,
- const char *filename2,
- struct merge_file_info *mfi)
-{
- char *side1 = NULL;
- char *side2 = NULL;
- int ret;
-
- if (filename1)
- side1 = xstrfmt("%s:%s", branch1, filename1);
- if (filename2)
- side2 = xstrfmt("%s:%s", branch2, filename2);
-
- ret = merge_file_1(o, one, a, b, target_filename,
- side1 ? side1 : branch1,
- side2 ? side2 : branch2, mfi);
-
- free(side1);
- free(side2);
- return ret;
-}
-
-static int merge_file_one(struct merge_options *o,
- const char *path,
- const struct object_id *o_oid, int o_mode,
- const struct object_id *a_oid, int a_mode,
- const struct object_id *b_oid, int b_mode,
- const char *branch1,
- const char *branch2,
- struct merge_file_info *mfi)
-{
- struct diff_filespec one, a, b;
-
- one.path = a.path = b.path = (char *)path;
- oidcpy(&one.oid, o_oid);
- one.mode = o_mode;
- oidcpy(&a.oid, a_oid);
- a.mode = a_mode;
- oidcpy(&b.oid, b_oid);
- b.mode = b_mode;
- return merge_file_1(o, &one, &a, &b, path, branch1, branch2, mfi);
-}
-
static int handle_rename_via_dir(struct merge_options *o,
struct diff_filepair *pair,
const char *rename_branch,
return target;
}
+static int handle_file_collision(struct merge_options *o,
+ const char *collide_path,
+ const char *prev_path1,
+ const char *prev_path2,
+ const char *branch1, const char *branch2,
+ const struct object_id *a_oid,
+ unsigned int a_mode,
+ const struct object_id *b_oid,
+ unsigned int b_mode)
+{
+ struct merge_file_info mfi;
+ struct diff_filespec null, a, b;
+ char *alt_path = NULL;
+ const char *update_path = collide_path;
+
+ /*
+ * It's easiest to get the correct things into stage 2 and 3, and
+ * to make sure that the content merge puts HEAD before the other
+ * branch if we just ensure that branch1 == o->branch1. So, simply
+ * flip arguments around if we don't have that.
+ */
+ if (branch1 != o->branch1) {
+ return handle_file_collision(o, collide_path,
+ prev_path2, prev_path1,
+ branch2, branch1,
+ b_oid, b_mode,
+ a_oid, a_mode);
+ }
+
+ /*
+ * In the recursive case, we just opt to undo renames
+ */
+ if (o->call_depth && (prev_path1 || prev_path2)) {
+ /* Put first file (a_oid, a_mode) in its original spot */
+ if (prev_path1) {
+ if (update_file(o, 1, a_oid, a_mode, prev_path1))
+ return -1;
+ } else {
+ if (update_file(o, 1, a_oid, a_mode, collide_path))
+ return -1;
+ }
+
+ /* Put second file (b_oid, b_mode) in its original spot */
+ if (prev_path2) {
+ if (update_file(o, 1, b_oid, b_mode, prev_path2))
+ return -1;
+ } else {
+ if (update_file(o, 1, b_oid, b_mode, collide_path))
+ return -1;
+ }
+
+ /* Don't leave something at collision path if unrenaming both */
+ if (prev_path1 && prev_path2)
+ remove_file(o, 1, collide_path, 0);
+
+ return 0;
+ }
+
+ /* Remove rename sources if rename/add or rename/rename(2to1) */
+ if (prev_path1)
+ remove_file(o, 1, prev_path1,
+ o->call_depth || would_lose_untracked(prev_path1));
+ if (prev_path2)
+ remove_file(o, 1, prev_path2,
+ o->call_depth || would_lose_untracked(prev_path2));
+
+ /*
+ * Remove the collision path, if it wouldn't cause dirty contents
+ * or an untracked file to get lost. We'll either overwrite with
+ * merged contents, or just write out to differently named files.
+ */
+ if (was_dirty(o, collide_path)) {
+ output(o, 1, _("Refusing to lose dirty file at %s"),
+ collide_path);
+ update_path = alt_path = unique_path(o, collide_path, "merged");
+ } else if (would_lose_untracked(collide_path)) {
+ /*
+ * Only way we get here is if both renames were from
+ * a directory rename AND user had an untracked file
+ * at the location where both files end up after the
+ * two directory renames. See testcase 10d of t6043.
+ */
+ output(o, 1, _("Refusing to lose untracked file at "
+ "%s, even though it's in the way."),
+ collide_path);
+ update_path = alt_path = unique_path(o, collide_path, "merged");
+ } else {
+ /*
+ * FIXME: It's possible that the two files are identical
+ * and that the current working copy happens to match, in
+ * which case we are unnecessarily touching the working
+ * tree file. It's not a likely enough scenario that I
+ * want to code up the checks for it and a better fix is
+ * available if we restructure how unpack_trees() and
+ * merge-recursive interoperate anyway, so punting for
+ * now...
+ */
+ remove_file(o, 0, collide_path, 0);
+ }
+
+ /* Store things in diff_filespecs for functions that need it */
+ memset(&a, 0, sizeof(struct diff_filespec));
+ memset(&b, 0, sizeof(struct diff_filespec));
+ null.path = a.path = b.path = (char *)collide_path;
+ oidcpy(&null.oid, &null_oid);
+ null.mode = 0;
+ oidcpy(&a.oid, a_oid);
+ a.mode = a_mode;
+ a.oid_valid = 1;
+ oidcpy(&b.oid, b_oid);
+ b.mode = b_mode;
+ b.oid_valid = 1;
+
+ if (merge_mode_and_contents(o, &null, &a, &b, collide_path,
+ branch1, branch2, o->call_depth * 2, &mfi))
+ return -1;
+ mfi.clean &= !alt_path;
+ if (update_file(o, mfi.clean, &mfi.oid, mfi.mode, update_path))
+ return -1;
+ if (!mfi.clean && !o->call_depth &&
+ update_stages(o, collide_path, NULL, &a, &b))
+ return -1;
+ free(alt_path);
+ /*
+ * FIXME: If both a & b both started with conflicts (only possible
+ * if they came from a rename/rename(2to1)), but had IDENTICAL
+ * contents including those conflicts, then in the next line we claim
+ * it was clean. If someone cares about this case, we should have the
+ * caller notify us if we started with conflicts.
+ */
+ return mfi.clean;
+}
+
+static int handle_rename_add(struct merge_options *o,
+ struct rename_conflict_info *ci)
+{
+ /* a was renamed to c, and a separate c was added. */
+ struct diff_filespec *a = ci->pair1->one;
+ struct diff_filespec *c = ci->pair1->two;
+ char *path = c->path;
+ char *prev_path_desc;
+ struct merge_file_info mfi;
+
+ int other_stage = (ci->branch1 == o->branch1 ? 3 : 2);
+
+ output(o, 1, _("CONFLICT (rename/add): "
+ "Rename %s->%s in %s. Added %s in %s"),
+ a->path, c->path, ci->branch1,
+ c->path, ci->branch2);
+
+ prev_path_desc = xstrfmt("version of %s from %s", path, a->path);
+ if (merge_mode_and_contents(o, a, c, &ci->ren1_other, prev_path_desc,
+ o->branch1, o->branch2,
+ 1 + o->call_depth * 2, &mfi))
+ return -1;
+ free(prev_path_desc);
+
+ return handle_file_collision(o,
+ c->path, a->path, NULL,
+ ci->branch1, ci->branch2,
+ &mfi.oid, mfi.mode,
+ &ci->dst_entry1->stages[other_stage].oid,
+ ci->dst_entry1->stages[other_stage].mode);
+}
+
static int handle_file(struct merge_options *o,
struct diff_filespec *rename,
int stage,
struct merge_file_info mfi;
struct diff_filespec other;
struct diff_filespec *add;
- if (merge_file_one(o, one->path,
- &one->oid, one->mode,
- &a->oid, a->mode,
- &b->oid, b->mode,
- ci->branch1, ci->branch2, &mfi))
+ if (merge_mode_and_contents(o, one, a, b, one->path,
+ ci->branch1, ci->branch2,
+ o->call_depth * 2, &mfi))
return -1;
/*
char *path_side_2_desc;
struct merge_file_info mfi_c1;
struct merge_file_info mfi_c2;
- int ret;
output(o, 1, _("CONFLICT (rename/rename): "
"Rename %s->%s in %s. "
a->path, c1->path, ci->branch1,
b->path, c2->path, ci->branch2);
- remove_file(o, 1, a->path, o->call_depth || would_lose_untracked(a->path));
- remove_file(o, 1, b->path, o->call_depth || would_lose_untracked(b->path));
-
- path_side_1_desc = xstrfmt("%s (was %s)", path, a->path);
- path_side_2_desc = xstrfmt("%s (was %s)", path, b->path);
- if (merge_file_special_markers(o, a, c1, &ci->ren1_other,
- path_side_1_desc,
- o->branch1, c1->path,
- o->branch2, ci->ren1_other.path, &mfi_c1) ||
- merge_file_special_markers(o, b, &ci->ren2_other, c2,
- path_side_2_desc,
- o->branch1, ci->ren2_other.path,
- o->branch2, c2->path, &mfi_c2))
+ path_side_1_desc = xstrfmt("version of %s from %s", path, a->path);
+ path_side_2_desc = xstrfmt("version of %s from %s", path, b->path);
+ if (merge_mode_and_contents(o, a, c1, &ci->ren1_other, path_side_1_desc,
+ o->branch1, o->branch2,
+ 1 + o->call_depth * 2, &mfi_c1) ||
+ merge_mode_and_contents(o, b, &ci->ren2_other, c2, path_side_2_desc,
+ o->branch1, o->branch2,
+ 1 + o->call_depth * 2, &mfi_c2))
return -1;
free(path_side_1_desc);
free(path_side_2_desc);
- if (o->call_depth) {
- /*
- * If mfi_c1.clean && mfi_c2.clean, then it might make
- * sense to do a two-way merge of those results. But, I
- * think in all cases, it makes sense to have the virtual
- * merge base just undo the renames; they can be detected
- * again later for the non-recursive merge.
- */
- remove_file(o, 0, path, 0);
- ret = update_file(o, 0, &mfi_c1.oid, mfi_c1.mode, a->path);
- if (!ret)
- ret = update_file(o, 0, &mfi_c2.oid, mfi_c2.mode,
- b->path);
- } else {
- char *new_path1 = unique_path(o, path, ci->branch1);
- char *new_path2 = unique_path(o, path, ci->branch2);
- output(o, 1, _("Renaming %s to %s and %s to %s instead"),
- a->path, new_path1, b->path, new_path2);
- if (was_dirty(o, path))
- output(o, 1, _("Refusing to lose dirty file at %s"),
- path);
- else if (would_lose_untracked(path))
- /*
- * Only way we get here is if both renames were from
- * a directory rename AND user had an untracked file
- * at the location where both files end up after the
- * two directory renames. See testcase 10d of t6043.
- */
- output(o, 1, _("Refusing to lose untracked file at "
- "%s, even though it's in the way."),
- path);
- else
- remove_file(o, 0, path, 0);
- ret = update_file(o, 0, &mfi_c1.oid, mfi_c1.mode, new_path1);
- if (!ret)
- ret = update_file(o, 0, &mfi_c2.oid, mfi_c2.mode,
- new_path2);
- /*
- * unpack_trees() actually populates the index for us for
- * "normal" rename/rename(2to1) situtations so that the
- * correct entries are at the higher stages, which would
- * make the call below to update_stages_for_stage_data
- * unnecessary. However, if either of the renames came
- * from a directory rename, then unpack_trees() will not
- * have gotten the right data loaded into the index, so we
- * need to do so now. (While it'd be tempting to move this
- * call to update_stages_for_stage_data() to
- * apply_directory_rename_modifications(), that would break
- * our intermediate calls to would_lose_untracked() since
- * those rely on the current in-memory index. See also the
- * big "NOTE" in update_stages()).
- */
- if (update_stages_for_stage_data(o, path, ci->dst_entry1))
- ret = -1;
-
- free(new_path2);
- free(new_path1);
- }
-
- return ret;
+ return handle_file_collision(o, path, a->path, b->path,
+ ci->branch1, ci->branch2,
+ &mfi_c1.oid, mfi_c1.mode,
+ &mfi_c2.oid, mfi_c2.mode);
}
/*
0 /* update_wd */))
clean_merge = -1;
} else if (!oid_eq(&dst_other.oid, &null_oid)) {
- clean_merge = 0;
- try_merge = 1;
- output(o, 1, _("CONFLICT (rename/add): Rename %s->%s in %s. "
- "%s added in %s"),
- ren1_src, ren1_dst, branch1,
- ren1_dst, branch2);
- if (o->call_depth) {
- struct merge_file_info mfi;
- if (merge_file_one(o, ren1_dst, &null_oid, 0,
- &ren1->pair->two->oid,
- ren1->pair->two->mode,
- &dst_other.oid,
- dst_other.mode,
- branch1, branch2, &mfi)) {
- clean_merge = -1;
- goto cleanup_and_return;
- }
- output(o, 1, _("Adding merged %s"), ren1_dst);
- if (update_file(o, 0, &mfi.oid,
- mfi.mode, ren1_dst))
- clean_merge = -1;
- try_merge = 0;
- } else {
- char *new_path = unique_path(o, ren1_dst, branch2);
- output(o, 1, _("Adding as %s instead"), new_path);
- if (update_file(o, 0, &dst_other.oid,
- dst_other.mode, new_path))
- clean_merge = -1;
- free(new_path);
- }
+ /*
+ * Probably not a clean merge, but it's
+ * premature to set clean_merge to 0 here,
+ * because if the rename merges cleanly and
+ * the merge exactly matches the newly added
+ * file, then the merge will be clean.
+ */
+ setup_rename_conflict_info(RENAME_ADD,
+ ren1->pair,
+ NULL,
+ branch1,
+ branch2,
+ ren1->dst_entry,
+ NULL,
+ o,
+ ren1->src_entry,
+ NULL);
} else
try_merge = 1;
_("modify"), _("modified"));
}
-static int merge_content(struct merge_options *o,
- const char *path,
- int is_dirty,
- struct object_id *o_oid, int o_mode,
- struct object_id *a_oid, int a_mode,
- struct object_id *b_oid, int b_mode,
- struct rename_conflict_info *rename_conflict_info)
+static int handle_content_merge(struct merge_options *o,
+ const char *path,
+ int is_dirty,
+ struct object_id *o_oid, int o_mode,
+ struct object_id *a_oid, int a_mode,
+ struct object_id *b_oid, int b_mode,
+ struct rename_conflict_info *rename_conflict_info)
{
const char *reason = _("content");
const char *path1 = NULL, *path2 = NULL;
path2 = (rename_conflict_info->pair2 ||
o->branch2 == rename_conflict_info->branch1) ?
pair1->two->path : pair1->one->path;
+ one.path = pair1->one->path;
+ a.path = (char *)path1;
+ b.path = (char *)path2;
if (dir_in_way(path, !o->call_depth,
S_ISGITLINK(pair1->two->mode)))
df_conflict_remains = 1;
}
- if (merge_file_special_markers(o, &one, &a, &b, path,
- o->branch1, path1,
- o->branch2, path2, &mfi))
+ if (merge_mode_and_contents(o, &one, &a, &b, path,
+ o->branch1, o->branch2,
+ o->call_depth * 2, &mfi))
return -1;
/*
struct rename_conflict_info *ci)
{
/* Merge the content and write it out */
- return merge_content(o, path, was_dirty(o, path),
- o_oid, o_mode, a_oid, a_mode, b_oid, b_mode,
- ci);
+ return handle_content_merge(o, path, was_dirty(o, path),
+ o_oid, o_mode, a_oid, a_mode, b_oid, b_mode,
+ ci);
}
/* Per entry merge function */
conflict_info->branch2))
clean_merge = -1;
break;
+ case RENAME_ADD:
+ /*
+ * Probably unclean merge, but if the renamed file
+ * merges cleanly and the result can then be
+ * two-way merged cleanly with the added file, I
+ * guess it's a clean merge?
+ */
+ clean_merge = handle_rename_add(o, conflict_info);
+ break;
case RENAME_DELETE:
clean_merge = 0;
if (handle_rename_delete(o,
clean_merge = -1;
break;
case RENAME_TWO_FILES_TO_ONE:
- clean_merge = 0;
- if (handle_rename_rename_2to1(o, conflict_info))
- clean_merge = -1;
+ /*
+ * Probably unclean merge, but if the two renamed
+ * files merge cleanly and the two resulting files
+ * can then be two-way merged cleanly, I guess it's
+ * a clean merge?
+ */
+ clean_merge = handle_rename_rename_2to1(o,
+ conflict_info);
break;
default:
entry->processed = 0;
/* Case C: Added in both (check for same permissions) and */
/* case D: Modified in both, but differently. */
int is_dirty = 0; /* unpack_trees would have bailed if dirty */
- clean_merge = merge_content(o, path, is_dirty,
- o_oid, o_mode, a_oid, a_mode, b_oid, b_mode,
- NULL);
+ clean_merge = handle_content_merge(o, path, is_dirty,
+ o_oid, o_mode,
+ a_oid, a_mode,
+ b_oid, b_mode,
+ NULL);
} else if (!o_oid && !a_oid && !b_oid) {
/*
* this entry was deleted altogether. a_mode == 0 means