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-rwxr-xr-xt/t6404-recursive-merge.sh153
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+#!/bin/sh
+
+test_description='Test merge without common ancestors'
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+# This scenario is based on a real-world repository of Shawn Pearce.
+
+# 1 - A - D - F
+# \ X /
+# B X
+# X \
+# 2 - C - E - G
+
+GIT_COMMITTER_DATE="2006-12-12 23:28:00 +0100"
+export GIT_COMMITTER_DATE
+
+test_expect_success 'setup tests' '
+ GIT_TEST_COMMIT_GRAPH=0 &&
+ export GIT_TEST_COMMIT_GRAPH &&
+ echo 1 >a1 &&
+ git add a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:00" git commit -m 1 a1 &&
+
+ git checkout -b A main &&
+ echo A >a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:01" git commit -m A a1 &&
+
+ git checkout -b B main &&
+ echo B >a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:02" git commit -m B a1 &&
+
+ git checkout -b D A &&
+ git rev-parse B >.git/MERGE_HEAD &&
+ echo D >a1 &&
+ git update-index a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:03" git commit -m D &&
+
+ git symbolic-ref HEAD refs/heads/other &&
+ echo 2 >a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:04" git commit -m 2 a1 &&
+
+ git checkout -b C &&
+ echo C >a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:05" git commit -m C a1 &&
+
+ git checkout -b E C &&
+ git rev-parse B >.git/MERGE_HEAD &&
+ echo E >a1 &&
+ git update-index a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:06" git commit -m E &&
+
+ git checkout -b G E &&
+ git rev-parse A >.git/MERGE_HEAD &&
+ echo G >a1 &&
+ git update-index a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:07" git commit -m G &&
+
+ git checkout -b F D &&
+ git rev-parse C >.git/MERGE_HEAD &&
+ echo F >a1 &&
+ git update-index a1 &&
+ GIT_AUTHOR_DATE="2006-12-12 23:00:08" git commit -m F &&
+
+ test_oid_cache <<-EOF
+ idxstage1 sha1:ec3fe2a791706733f2d8fa7ad45d9a9672031f5e
+ idxstage1 sha256:b3c8488929903aaebdeb22270cb6d36e5b8724b01ae0d4da24632f158c99676f
+ EOF
+'
+
+test_expect_success 'combined merge conflicts' '
+ test_must_fail git merge -m final G
+'
+
+test_expect_success 'result contains a conflict' '
+ cat >expect <<-\EOF &&
+ <<<<<<< HEAD
+ F
+ =======
+ G
+ >>>>>>> G
+ EOF
+
+ test_cmp expect a1
+'
+
+test_expect_success 'virtual trees were processed' '
+ # TODO: fragile test, relies on ambigious merge-base resolution
+ git ls-files --stage >out &&
+
+ cat >expect <<-EOF &&
+ 100644 $(test_oid idxstage1) 1 a1
+ 100644 $(git rev-parse F:a1) 2 a1
+ 100644 $(git rev-parse G:a1) 3 a1
+ EOF
+
+ test_cmp expect out
+'
+
+test_expect_success 'refuse to merge binary files' '
+ git reset --hard &&
+ printf "\0" >binary-file &&
+ git add binary-file &&
+ git commit -m binary &&
+ git checkout G &&
+ printf "\0\0" >binary-file &&
+ git add binary-file &&
+ git commit -m binary2 &&
+ if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+ then
+ test_must_fail git merge F >merge_output
+ else
+ test_must_fail git merge F 2>merge_output
+ fi &&
+ grep "Cannot merge binary files: binary-file (HEAD vs. F)" merge_output
+'
+
+test_expect_success 'mark rename/delete as unmerged' '
+
+ git reset --hard &&
+ git checkout -b delete &&
+ git rm a1 &&
+ test_tick &&
+ git commit -m delete &&
+ git checkout -b rename HEAD^ &&
+ git mv a1 a2 &&
+ test_tick &&
+ git commit -m rename &&
+ test_must_fail git merge delete &&
+ if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+ then
+ test 2 = $(git ls-files --unmerged | wc -l)
+ else
+ test 1 = $(git ls-files --unmerged | wc -l)
+ fi &&
+ git rev-parse --verify :2:a2 &&
+ test_must_fail git rev-parse --verify :3:a2 &&
+ git checkout -f delete &&
+ test_must_fail git merge rename &&
+ if test "$GIT_TEST_MERGE_ALGORITHM" = ort
+ then
+ test 2 = $(git ls-files --unmerged | wc -l)
+ else
+ test 1 = $(git ls-files --unmerged | wc -l)
+ fi &&
+ test_must_fail git rev-parse --verify :2:a2 &&
+ git rev-parse --verify :3:a2
+'
+
+test_done