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author | Victoria Dye <vdye@github.com> | 2022-03-01 20:24:31 (GMT) |
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committer | Junio C Hamano <gitster@pobox.com> | 2022-03-01 20:36:01 (GMT) |
commit | f27c170f645e6b8ed642c49c503964893ee26a4f (patch) | |
tree | c0d312c61552349d77fba491c80761fa324a5b69 | |
parent | ab81047a6c5c4f98640f8a2f56e138367cfdada9 (diff) | |
download | git-f27c170f645e6b8ed642c49c503964893ee26a4f.zip git-f27c170f645e6b8ed642c49c503964893ee26a4f.tar.gz git-f27c170f645e6b8ed642c49c503964893ee26a4f.tar.bz2 |
read-tree: make three-way merge sparse-aware
Enable use of 'merged_sparse_dir' in 'threeway_merge'. As with two-way
merge, the contents of each conflicted sparse directory are merged without
referencing the index, avoiding sparse index expansion.
As with two-way merge, the 't/t1092-sparse-checkout-compatibility.sh' test
'read-tree --merge with edit/edit conflicts in sparse directories' confirms
that three-way merges with edit/edit changes (both with and without
conflicts) inside a sparse directory result in the correct index state or
error message. To ensure the index is not unnecessarily expanded, add
three-way merge cases to 'sparse index is not expanded: read-tree'.
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r-- | builtin/read-tree.c | 5 | ||||
-rwxr-xr-x | t/t1092-sparse-checkout-compatibility.sh | 4 | ||||
-rw-r--r-- | unpack-trees.c | 34 |
3 files changed, 29 insertions, 14 deletions
diff --git a/builtin/read-tree.c b/builtin/read-tree.c index 9227f07..9f1f33e 100644 --- a/builtin/read-tree.c +++ b/builtin/read-tree.c @@ -234,11 +234,6 @@ int cmd_read_tree(int argc, const char **argv, const char *cmd_prefix) break; case 3: default: - /* - * TODO: update threeway_merge to handle edit/edit conflicts in - * sparse directories. - */ - ensure_full_index(&the_index); opts.fn = threeway_merge; break; } diff --git a/t/t1092-sparse-checkout-compatibility.sh b/t/t1092-sparse-checkout-compatibility.sh index 61dc2ea..8be8e3c 100755 --- a/t/t1092-sparse-checkout-compatibility.sh +++ b/t/t1092-sparse-checkout-compatibility.sh @@ -1413,7 +1413,9 @@ test_expect_success 'sparse index is not expanded: read-tree' ' init_repos && ensure_not_expanded checkout -b test-branch update-folder1 && - for MERGE_TREES in "base update-folder2" \ + for MERGE_TREES in "base HEAD update-folder2" \ + "base HEAD rename-base" \ + "base update-folder2" \ "base rename-base" \ "update-folder2" do diff --git a/unpack-trees.c b/unpack-trees.c index 0c2a678..b876cac 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -2643,16 +2643,24 @@ int threeway_merge(const struct cache_entry * const *stages, */ /* #14, #14ALT, #2ALT */ if (remote && !df_conflict_head && head_match && !remote_match) { - if (index && !same(index, remote) && !same(index, head)) - return reject_merge(index, o); + if (index && !same(index, remote) && !same(index, head)) { + if (S_ISSPARSEDIR(index->ce_mode)) + return merged_sparse_dir(stages, 4, o); + else + return reject_merge(index, o); + } return merged_entry(remote, index, o); } /* * If we have an entry in the index cache, then we want to * make sure that it matches head. */ - if (index && !same(index, head)) - return reject_merge(index, o); + if (index && !same(index, head)) { + if (S_ISSPARSEDIR(index->ce_mode)) + return merged_sparse_dir(stages, 4, o); + else + return reject_merge(index, o); + } if (head) { /* #5ALT, #15 */ @@ -2714,11 +2722,21 @@ int threeway_merge(const struct cache_entry * const *stages, } - /* Below are "no merge" cases, which require that the index be - * up-to-date to avoid the files getting overwritten with - * conflict resolution files. - */ + /* Handle "no merge" cases (see t/t1000-read-tree-m-3way.sh) */ if (index) { + /* + * If we've reached the "no merge" cases and we're merging + * a sparse directory, we may have an "edit/edit" conflict that + * can be resolved by individually merging directory contents. + */ + if (S_ISSPARSEDIR(index->ce_mode)) + return merged_sparse_dir(stages, 4, o); + + /* + * If we're not merging a sparse directory, ensure the index is + * up-to-date to avoid files getting overwritten with conflict + * resolution files + */ if (verify_uptodate(index, o)) return -1; } |