From: "Elijah Newren via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Jonathan Nieder" <jrnieder@gmail.com>,
"Derrick Stolee" <dstolee@microsoft.com>,
"Junio C Hamano" <gitster@pobox.com>,
"Elijah Newren" <newren@gmail.com>,
"Elijah Newren" <newren@gmail.com>,
"Elijah Newren" <newren@gmail.com>
Subject: [PATCH v2 04/10] merge-ort: let renormalization change modify/delete into clean delete
Date: Tue, 09 Mar 2021 06:24:39 +0000 [thread overview]
Message-ID: <7fcabded50166523588177216ab6b8e8973d1905.1615271086.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.973.v2.git.git.1615271086.gitgitgadget@gmail.com>
From: Elijah Newren <newren@gmail.com>
When we have a modify/delete conflict, but the only change to the
modification is e.g. change of line endings, then if renormalization is
requested then we should be able to recognize such a case as a
not-modified/delete and resolve the conflict automatically.
This fixes t6418.10 under GIT_TEST_MERGE_ALGORITHM=ort.
Signed-off-by: Elijah Newren <newren@gmail.com>
---
merge-ort.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 62 insertions(+), 2 deletions(-)
diff --git a/merge-ort.c b/merge-ort.c
index ea720eb51971..db46f496cb82 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -2414,6 +2414,61 @@ static int string_list_df_name_compare(const char *one, const char *two)
return onelen - twolen;
}
+static int read_oid_strbuf(struct merge_options *opt,
+ const struct object_id *oid,
+ struct strbuf *dst)
+{
+ void *buf;
+ enum object_type type;
+ unsigned long size;
+ buf = read_object_file(oid, &type, &size);
+ if (!buf)
+ return err(opt, _("cannot read object %s"), oid_to_hex(oid));
+ if (type != OBJ_BLOB) {
+ free(buf);
+ return err(opt, _("object %s is not a blob"), oid_to_hex(oid));
+ }
+ strbuf_attach(dst, buf, size, size + 1);
+ return 0;
+}
+
+static int blob_unchanged(struct merge_options *opt,
+ const struct version_info *base,
+ const struct version_info *side,
+ const char *path)
+{
+ struct strbuf basebuf = STRBUF_INIT;
+ struct strbuf sidebuf = STRBUF_INIT;
+ int ret = 0; /* assume changed for safety */
+ const struct index_state *idx = &opt->priv->attr_index;
+
+ if (!idx->initialized)
+ initialize_attr_index(opt);
+
+ if (base->mode != side->mode)
+ return 0;
+ if (oideq(&base->oid, &side->oid))
+ return 1;
+
+ if (read_oid_strbuf(opt, &base->oid, &basebuf) ||
+ read_oid_strbuf(opt, &side->oid, &sidebuf))
+ goto error_return;
+ /*
+ * Note: binary | is used so that both renormalizations are
+ * performed. Comparison can be skipped if both files are
+ * unchanged since their sha1s have already been compared.
+ */
+ if (renormalize_buffer(idx, path, basebuf.buf, basebuf.len, &basebuf) |
+ renormalize_buffer(idx, path, sidebuf.buf, sidebuf.len, &sidebuf))
+ ret = (basebuf.len == sidebuf.len &&
+ !memcmp(basebuf.buf, sidebuf.buf, basebuf.len));
+
+error_return:
+ strbuf_release(&basebuf);
+ strbuf_release(&sidebuf);
+ return ret;
+}
+
struct directory_versions {
/*
* versions: list of (basename -> version_info)
@@ -3001,8 +3056,13 @@ static void process_entry(struct merge_options *opt,
modify_branch = (side == 1) ? opt->branch1 : opt->branch2;
delete_branch = (side == 1) ? opt->branch2 : opt->branch1;
- if (ci->path_conflict &&
- oideq(&ci->stages[0].oid, &ci->stages[side].oid)) {
+ if (opt->renormalize &&
+ blob_unchanged(opt, &ci->stages[0], &ci->stages[side],
+ path)) {
+ ci->merged.is_null = 1;
+ ci->merged.clean = 1;
+ } else if (ci->path_conflict &&
+ oideq(&ci->stages[0].oid, &ci->stages[side].oid)) {
/*
* This came from a rename/delete; no action to take,
* but avoid printing "modify/delete" conflict notice
--
gitgitgadget
next prev parent reply other threads:[~2021-03-09 6:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 0:55 [PATCH 00/11] Complete merge-ort implementation...almost Elijah Newren via GitGitGadget
2021-03-05 0:55 ` [PATCH 01/11] merge-ort: use STABLE_QSORT instead of QSORT where required Elijah Newren via GitGitGadget
2021-03-05 0:55 ` [PATCH 02/11] merge-ort: add a special minimal index just for renormalization Elijah Newren via GitGitGadget
2021-03-05 0:55 ` [PATCH 03/11] merge-ort: add a function for initializing our special attr_index Elijah Newren via GitGitGadget
2021-03-08 12:46 ` Ævar Arnfjörð Bjarmason
2021-03-05 0:55 ` [PATCH 04/11] merge-ort: have ll_merge() calls use the attr_index for renormalization Elijah Newren via GitGitGadget
2021-03-08 12:49 ` Ævar Arnfjörð Bjarmason
2021-03-09 4:27 ` Elijah Newren
2021-03-05 0:55 ` [PATCH 05/11] merge-ort: let renormalization change modify/delete into clean delete Elijah Newren via GitGitGadget
2021-03-08 12:55 ` Ævar Arnfjörð Bjarmason
2021-03-05 0:55 ` [PATCH 06/11] merge-ort: support subtree shifting Elijah Newren via GitGitGadget
2021-03-05 0:55 ` [PATCH 07/11] t6428: new test for SKIP_WORKTREE handling and conflicts Elijah Newren via GitGitGadget
2021-03-08 13:03 ` Ævar Arnfjörð Bjarmason
2021-03-08 20:52 ` Elijah Newren
2021-03-05 0:55 ` [PATCH 08/11] merge-ort: implement CE_SKIP_WORKTREE handling with conflicted entries Elijah Newren via GitGitGadget
2021-03-08 13:06 ` Ævar Arnfjörð Bjarmason
2021-03-08 20:54 ` Elijah Newren
2021-03-05 0:55 ` [PATCH 09/11] t: mark several submodule merging tests as fixed under merge-ort Elijah Newren via GitGitGadget
2021-03-08 13:07 ` Ævar Arnfjörð Bjarmason
2021-03-05 0:55 ` [PATCH 10/11] merge-ort: write $GIT_DIR/AUTO_MERGE whenever we hit a conflict Elijah Newren via GitGitGadget
2021-03-08 13:11 ` Ævar Arnfjörð Bjarmason
2021-03-08 21:51 ` Elijah Newren
2021-03-05 0:55 ` [PATCH 11/11] merge-recursive: add a bunch of FIXME comments documenting known bugs Elijah Newren via GitGitGadget
2021-03-08 13:12 ` Ævar Arnfjörð Bjarmason
2021-03-08 14:43 ` [PATCH 00/11] Complete merge-ort implementation...almost Ævar Arnfjörð Bjarmason
2021-03-08 22:13 ` Elijah Newren
2021-03-09 6:24 ` [PATCH v2 00/10] " Elijah Newren via GitGitGadget
2021-03-09 6:24 ` [PATCH v2 01/10] merge-ort: use STABLE_QSORT instead of QSORT where required Elijah Newren via GitGitGadget
2021-03-09 6:24 ` [PATCH v2 02/10] merge-ort: add a special minimal index just for renormalization Elijah Newren via GitGitGadget
2021-03-11 14:48 ` Derrick Stolee
2021-03-09 6:24 ` [PATCH v2 03/10] merge-ort: have ll_merge() use a special attr_index " Elijah Newren via GitGitGadget
2021-03-11 14:52 ` Derrick Stolee
2021-03-09 6:24 ` Elijah Newren via GitGitGadget [this message]
2021-03-09 6:24 ` [PATCH v2 05/10] merge-ort: support subtree shifting Elijah Newren via GitGitGadget
2021-03-09 6:24 ` [PATCH v2 06/10] t6428: new test for SKIP_WORKTREE handling and conflicts Elijah Newren via GitGitGadget
2021-03-11 14:55 ` Derrick Stolee
2021-03-09 6:24 ` [PATCH v2 07/10] merge-ort: implement CE_SKIP_WORKTREE handling with conflicted entries Elijah Newren via GitGitGadget
2021-03-09 6:24 ` [PATCH v2 08/10] t: mark several submodule merging tests as fixed under merge-ort Elijah Newren via GitGitGadget
2021-03-11 15:15 ` Derrick Stolee
2021-03-09 6:24 ` [PATCH v2 09/10] merge-ort: write $GIT_DIR/AUTO_MERGE whenever we hit a conflict Elijah Newren via GitGitGadget
2021-03-09 6:24 ` [PATCH v2 10/10] merge-recursive: add a bunch of FIXME comments documenting known bugs Elijah Newren via GitGitGadget
2021-03-11 15:20 ` [PATCH v2 00/10] Complete merge-ort implementation...almost Derrick Stolee
2021-03-11 16:42 ` Elijah Newren
2021-03-17 21:42 ` Elijah Newren
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