From d30126c20d5899f128facbd33ecf27163efe1326 Mon Sep 17 00:00:00 2001 From: Elijah Newren Date: Tue, 28 Dec 2021 00:20:46 +0000 Subject: [PATCH] merge-ort: fix bug with renormalization and rename/delete conflicts Ever since commit a492d5331c ("merge-ort: ensure we consult df_conflict and path_conflicts", 2021-06-30), when renormalization is active AND a file is involved in a rename/delete conflict BUT the file is unmodified (either before or after renormalization), merge-ort was running into an assertion failure. Prior to that commit (or if assertions were compiled out), merge-ort would mis-merge instead, ignoring the rename/delete conflict and just deleting the file. Remove the assertions, fix the code appropriately, leave some good comments in the code, and add a testcase for this situation. Reported-by: Ralf Thielow Signed-off-by: Elijah Newren Reviewed-by: Derrick Stolee Signed-off-by: Junio C Hamano --- merge-ort.c | 19 ++++++++++++++++--- t/t6418-merge-text-auto.sh | 26 ++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 3 deletions(-) diff --git a/merge-ort.c b/merge-ort.c index 0342f10483..c319797021 100644 --- a/merge-ort.c +++ b/merge-ort.c @@ -3841,9 +3841,22 @@ static void process_entry(struct merge_options *opt, if (opt->renormalize && blob_unchanged(opt, &ci->stages[0], &ci->stages[side], path)) { - ci->merged.is_null = 1; - ci->merged.clean = 1; - assert(!ci->df_conflict && !ci->path_conflict); + if (!ci->path_conflict) { + /* + * Blob unchanged after renormalization, so + * there's no modify/delete conflict after all; + * we can just remove the file. + */ + ci->merged.is_null = 1; + ci->merged.clean = 1; + /* + * file goes away => even if there was a + * directory/file conflict there isn't one now. + */ + ci->df_conflict = 0; + } else { + /* rename/delete, so conflict remains */ + } } else if (ci->path_conflict && oideq(&ci->stages[0].oid, &ci->stages[side].oid)) { /* diff --git a/t/t6418-merge-text-auto.sh b/t/t6418-merge-text-auto.sh index 1e0296dd17..41288a60ce 100755 --- a/t/t6418-merge-text-auto.sh +++ b/t/t6418-merge-text-auto.sh @@ -204,4 +204,30 @@ test_expect_success 'Test delete/normalize conflict' ' test_path_is_missing file ' +test_expect_success 'rename/delete vs. renormalization' ' + git init subrepo && + ( + cd subrepo && + echo foo >oldfile && + git add oldfile && + git commit -m original && + + git branch rename && + git branch nuke && + + git checkout rename && + git mv oldfile newfile && + git commit -m renamed && + + git checkout nuke && + git rm oldfile && + git commit -m deleted && + + git checkout rename^0 && + test_must_fail git -c merge.renormalize=true merge nuke >out && + + grep "rename/delete" out + ) +' + test_done