diff options
| -rw-r--r-- | merge-recursive.c | 16 | ||||
| -rwxr-xr-x | t/t6036-recursive-corner-cases.sh | 8 | ||||
| -rwxr-xr-x | t/t6047-diff3-conflict-markers.sh | 189 |
3 files changed, 209 insertions, 4 deletions
diff --git a/merge-recursive.c b/merge-recursive.c index a67ea4957a..e6b84db2ef 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -3507,6 +3507,11 @@ int merge_recursive(struct merge_options *opt, struct commit *merged_common_ancestors; struct tree *mrtree; int clean; + const char *ancestor_name; + struct strbuf merge_base_abbrev = STRBUF_INIT; + + if (!opt->call_depth) + assert(opt->ancestor == NULL); if (show(opt, 4)) { output(opt, 4, _("Merging:")); @@ -3535,6 +3540,14 @@ int merge_recursive(struct merge_options *opt, tree = lookup_tree(opt->repo, opt->repo->hash_algo->empty_tree); merged_common_ancestors = make_virtual_commit(opt->repo, tree, "ancestor"); + ancestor_name = "empty tree"; + } else if (ca) { + ancestor_name = "merged common ancestors"; + } else { + strbuf_add_unique_abbrev(&merge_base_abbrev, + &merged_common_ancestors->object.oid, + DEFAULT_ABBREV); + ancestor_name = merge_base_abbrev.buf; } for (iter = ca; iter; iter = iter->next) { @@ -3568,10 +3581,11 @@ int merge_recursive(struct merge_options *opt, if (!opt->call_depth) repo_read_index(opt->repo); - opt->ancestor = "merged common ancestors"; + opt->ancestor = ancestor_name; clean = merge_trees(opt, get_commit_tree(h1), get_commit_tree(h2), get_commit_tree(merged_common_ancestors), &mrtree); + strbuf_release(&merge_base_abbrev); if (clean < 0) { flush_output(opt); return clean; diff --git a/t/t6036-recursive-corner-cases.sh b/t/t6036-recursive-corner-cases.sh index d23b948f27..7fddcc8c73 100755 --- a/t/t6036-recursive-corner-cases.sh +++ b/t/t6036-recursive-corner-cases.sh @@ -1562,6 +1562,7 @@ test_expect_success 'check nested conflicts' ' cd nested_conflicts && git clean -f && + MASTER=$(git rev-parse --short master) && git checkout L2^0 && # Merge must fail; there is a conflict @@ -1582,7 +1583,7 @@ test_expect_success 'check nested conflicts' ' git cat-file -p R1:a >theirs && test_must_fail git merge-file --diff3 \ -L "Temporary merge branch 1" \ - -L "merged common ancestors" \ + -L "$MASTER" \ -L "Temporary merge branch 2" \ ours \ base \ @@ -1594,7 +1595,7 @@ test_expect_success 'check nested conflicts' ' git cat-file -p R1:b >theirs && test_must_fail git merge-file --diff3 \ -L "Temporary merge branch 1" \ - -L "merged common ancestors" \ + -L "$MASTER" \ -L "Temporary merge branch 2" \ ours \ base \ @@ -1732,6 +1733,7 @@ test_expect_success 'check virtual merge base with nested conflicts' ' ( cd virtual_merge_base_has_nested_conflicts && + MASTER=$(git rev-parse --short master) && git checkout L3^0 && # Merge must fail; there is a conflict @@ -1760,7 +1762,7 @@ test_expect_success 'check virtual merge base with nested conflicts' ' cp left merged-once && test_must_fail git merge-file --diff3 \ -L "Temporary merge branch 1" \ - -L "merged common ancestors" \ + -L "$MASTER" \ -L "Temporary merge branch 2" \ merged-once \ base \ diff --git a/t/t6047-diff3-conflict-markers.sh b/t/t6047-diff3-conflict-markers.sh new file mode 100755 index 0000000000..3fb68e0aae --- /dev/null +++ b/t/t6047-diff3-conflict-markers.sh @@ -0,0 +1,189 @@ +#!/bin/sh + +test_description='recursive merge diff3 style conflict markers' + +. ./test-lib.sh + +# Setup: +# L1 +# \ +# ? +# / +# R1 +# +# Where: +# L1 and R1 both have a file named 'content' but have no common history +# + +test_expect_success 'setup no merge base' ' + test_create_repo no_merge_base && + ( + cd no_merge_base && + + git checkout -b L && + test_commit A content A && + + git checkout --orphan R && + test_commit B content B + ) +' + +test_expect_success 'check no merge base' ' + ( + cd no_merge_base && + + git checkout L^0 && + + test_must_fail git -c merge.conflictstyle=diff3 merge --allow-unrelated-histories -s recursive R^0 && + + grep "|||||| empty tree" content + ) +' + +# Setup: +# L1 +# / \ +# master ? +# \ / +# R1 +# +# Where: +# L1 and R1 have modified the same file ('content') in conflicting ways +# + +test_expect_success 'setup unique merge base' ' + test_create_repo unique_merge_base && + ( + cd unique_merge_base && + + test_commit base content "1 +2 +3 +4 +5 +" && + + git branch L && + git branch R && + + git checkout L && + test_commit L content "1 +2 +3 +4 +5 +7" && + + git checkout R && + git rm content && + test_commit R renamed "1 +2 +3 +4 +5 +six" + ) +' + +test_expect_success 'check unique merge base' ' + ( + cd unique_merge_base && + + git checkout L^0 && + MASTER=$(git rev-parse --short master) && + + test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R^0 && + + grep "|||||| $MASTER:content" renamed + ) +' + +# Setup: +# L1---L2--L3 +# / \ / \ +# master X1 ? +# \ / \ / +# R1---R2--R3 +# +# Where: +# commits L1 and R1 have modified the same file in non-conflicting ways +# X1 is an auto-generated merge-base used when merging L1 and R1 +# commits L2 and R2 are merges of R1 and L1 into L1 and R1, respectively +# commits L3 and R3 both modify 'content' in conflicting ways +# + +test_expect_success 'setup multiple merge bases' ' + test_create_repo multiple_merge_bases && + ( + cd multiple_merge_bases && + + test_commit initial content "1 +2 +3 +4 +5" && + + git branch L && + git branch R && + + # Create L1 + git checkout L && + test_commit L1 content "0 +1 +2 +3 +4 +5" && + + # Create R1 + git checkout R && + test_commit R1 content "1 +2 +3 +4 +5 +6" && + + # Create L2 + git checkout L && + git merge R1 && + + # Create R2 + git checkout R && + git merge L1 && + + # Create L3 + git checkout L && + test_commit L3 content "0 +1 +2 +3 +4 +5 +A" && + + # Create R3 + git checkout R && + git rm content && + test_commit R3 renamed "0 +2 +3 +4 +5 +six" + ) +' + +test_expect_success 'check multiple merge bases' ' + ( + cd multiple_merge_bases && + + git checkout L^0 && + + test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R^0 && + + grep "|||||| merged common ancestors:content" renamed + ) +' + +test_done |