git commit -m sub-b) &&
git add sub &&
test_tick &&
- git commit -m b
+ git commit -m b &&
git checkout -b c a &&
git merge -s ours b &&
git merge -s ours a
'
-test_expect_success 'merging with modify/modify conflict' '
+# History setup
+#
+# b
+# / \
+# init -- a d
+# \ \ /
+# g c
+#
+# a in the main repository records to sub-a in the submodule and
+# analogous b and c. d should be automatically found by merging c into
+# b in the main repository.
+test_expect_success 'setup for merge search' '
+ mkdir merge-search &&
+ (cd merge-search &&
+ git init &&
+ mkdir sub &&
+ (cd sub &&
+ git init &&
+ echo "file-a" > file-a &&
+ git add file-a &&
+ git commit -m "sub-a" &&
+ git branch sub-a) &&
+ git commit --allow-empty -m init &&
+ git branch init &&
+ git add sub &&
+ git commit -m "a" &&
+ git branch a &&
- git checkout -b test1 a &&
+ git checkout -b b &&
+ (cd sub &&
+ git checkout -b sub-b &&
+ echo "file-b" > file-b &&
+ git add file-b &&
+ git commit -m "sub-b") &&
+ git commit -a -m "b" &&
+
+ git checkout -b c a &&
+ (cd sub &&
+ git checkout -b sub-c sub-a &&
+ echo "file-c" > file-c &&
+ git add file-c &&
+ git commit -m "sub-c") &&
+ git commit -a -m "c" &&
+
+ git checkout -b d a &&
+ (cd sub &&
+ git checkout -b sub-d sub-b &&
+ git merge sub-c) &&
+ git commit -a -m "d" &&
+ git branch test b &&
+
+ git checkout -b g init &&
+ (cd sub &&
+ git checkout -b sub-g sub-c) &&
+ git add sub &&
+ git commit -a -m "g")
+'
+
+test_expect_success 'merge with one side as a fast-forward of the other' '
+ (cd merge-search &&
+ git checkout -b test-forward b &&
+ git merge d &&
+ git ls-tree test-forward sub | cut -f1 | cut -f3 -d" " > actual &&
+ (cd sub &&
+ git rev-parse sub-d > ../expect) &&
+ test_cmp expect actual)
+'
+
+test_expect_success 'merging should conflict for non fast-forward' '
+ (cd merge-search &&
+ git checkout -b test-nonforward b &&
+ (cd sub &&
+ git rev-parse sub-d > ../expect) &&
+ test_must_fail git merge c 2> actual &&
+ grep $(cat expect) actual > /dev/null &&
+ git reset --hard)
+'
+
+test_expect_success 'merging should fail for ambiguous common parent' '
+ (cd merge-search &&
+ git checkout -b test-ambiguous b &&
+ (cd sub &&
+ git checkout -b ambiguous sub-b &&
+ git merge sub-c &&
+ git rev-parse sub-d > ../expect1 &&
+ git rev-parse ambiguous > ../expect2) &&
+ test_must_fail git merge c 2> actual &&
+ grep $(cat expect1) actual > /dev/null &&
+ grep $(cat expect2) actual > /dev/null &&
+ git reset --hard)
+'
+
+# in a situation like this
+#
+# submodule tree:
+#
+# sub-a --- sub-b --- sub-d
+#
+# main tree:
+#
+# e (sub-a)
+# /
+# bb (sub-b)
+# \
+# f (sub-d)
+#
+# A merge between e and f should fail because one of the submodule
+# commits (sub-a) does not descend from the submodule merge-base (sub-b).
+#
+test_expect_success 'merging should fail for changes that are backwards' '
+ (cd merge-search &&
+ git checkout -b bb a &&
+ (cd sub &&
+ git checkout sub-b) &&
+ git commit -a -m "bb" &&
+
+ git checkout -b e bb &&
+ (cd sub &&
+ git checkout sub-a) &&
+ git commit -a -m "e" &&
+
+ git checkout -b f bb &&
+ (cd sub &&
+ git checkout sub-d) &&
+ git commit -a -m "f" &&
+
+ git checkout -b test-backward e &&
+ test_must_fail git merge f)
+'
+
+
+# Check that the conflicting submodule is detected when it is
+# in the common ancestor. status should be 'U00...00"
+test_expect_success 'git submodule status should display the merge conflict properly with merge base' '
+ (cd merge-search &&
+ cat >.gitmodules <<EOF &&
+[submodule "sub"]
+ path = sub
+ url = $TRASH_DIRECTORY/sub
+EOF
+ cat >expect <<EOF &&
+U0000000000000000000000000000000000000000 sub
+EOF
+ git submodule status > actual &&
+ test_cmp expect actual &&
+ git reset --hard)
+'
+
+# Check that the conflicting submodule is detected when it is
+# not in the common ancestor. status should be 'U00...00"
+test_expect_success 'git submodule status should display the merge conflict properly without merge-base' '
+ (cd merge-search &&
+ git checkout -b test-no-merge-base g &&
test_must_fail git merge b &&
- test -f .git/MERGE_MSG &&
- git diff &&
- test -n "$(git ls-files -u)"
+ cat >.gitmodules <<EOF &&
+[submodule "sub"]
+ path = sub
+ url = $TRASH_DIRECTORY/sub
+EOF
+ cat >expect <<EOF &&
+U0000000000000000000000000000000000000000 sub
+EOF
+ git submodule status > actual &&
+ test_cmp expect actual &&
+ git reset --hard)
'
-test_expect_success 'merging with a modify/modify conflict between merge bases' '
+test_expect_success 'merging with a modify/modify conflict between merge bases' '
git reset --hard HEAD &&
git checkout -b test2 c &&
git merge d
+'
+
+# canonical criss-cross history in top and submodule
+test_expect_success 'setup for recursive merge with submodule' '
+ mkdir merge-recursive &&
+ (cd merge-recursive &&
+ git init &&
+ mkdir sub &&
+ (cd sub &&
+ git init &&
+ test_commit a &&
+ git checkout -b sub-b master &&
+ test_commit b &&
+ git checkout -b sub-c master &&
+ test_commit c &&
+ git checkout -b sub-bc sub-b &&
+ git merge sub-c &&
+ git checkout -b sub-cb sub-c &&
+ git merge sub-b &&
+ git checkout master) &&
+ git add sub &&
+ git commit -m a &&
+ git checkout -b top-b master &&
+ (cd sub && git checkout sub-b) &&
+ git add sub &&
+ git commit -m b &&
+ git checkout -b top-c master &&
+ (cd sub && git checkout sub-c) &&
+ git add sub &&
+ git commit -m c &&
+ git checkout -b top-bc top-b &&
+ git merge -s ours --no-commit top-c &&
+ (cd sub && git checkout sub-bc) &&
+ git add sub &&
+ git commit -m bc &&
+ git checkout -b top-cb top-c &&
+ git merge -s ours --no-commit top-b &&
+ (cd sub && git checkout sub-cb) &&
+ git add sub &&
+ git commit -m cb)
+'
+
+# merge should leave submodule unmerged in index
+test_expect_success 'recursive merge with submodule' '
+ (cd merge-recursive &&
+ test_must_fail git merge top-bc &&
+ echo "160000 $(git rev-parse top-cb:sub) 2 sub" > expect2 &&
+ echo "160000 $(git rev-parse top-bc:sub) 3 sub" > expect3 &&
+ git ls-files -u > actual &&
+ grep "$(cat expect2)" actual > /dev/null &&
+ grep "$(cat expect3)" actual > /dev/null)
+'
+
+# File/submodule conflict
+# Commit O: <empty>
+# Commit A: path (submodule)
+# Commit B: path
+# Expected: path/ is submodule and file contents for B's path are somewhere
+
+test_expect_success 'setup file/submodule conflict' '
+ test_create_repo file-submodule &&
+ (
+ cd file-submodule &&
+
+ git commit --allow-empty -m O &&
+
+ git branch A &&
+ git branch B &&
+
+ git checkout B &&
+ echo content >path &&
+ git add path &&
+ git commit -m B &&
+
+ git checkout A &&
+ test_create_repo path &&
+ test_commit -C path world &&
+ git submodule add ./path &&
+ git commit -m A
+ )
+'
+
+test_expect_failure 'file/submodule conflict' '
+ test_when_finished "git -C file-submodule reset --hard" &&
+ (
+ cd file-submodule &&
+
+ git checkout A^0 &&
+ test_must_fail git merge B^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 3 out &&
+ git ls-files -u >out &&
+ test_line_count = 2 out &&
+
+ # path/ is still a submodule
+ test_path_is_dir path/.git &&
+
+ # There is a submodule at "path", so B:path cannot be written
+ # there. We expect it to be written somewhere in the same
+ # directory, though, so just grep for its content in all
+ # files, and ignore "grep: path: Is a directory" message
+ echo Checking if contents from B:path showed up anywhere &&
+ grep -q content * 2>/dev/null
+ )
+'
+
+test_expect_success 'file/submodule conflict; merge --abort works afterward' '
+ test_when_finished "git -C file-submodule reset --hard" &&
+ (
+ cd file-submodule &&
+
+ git checkout A^0 &&
+ test_must_fail git merge B^0 >out 2>err &&
+
+ test_path_is_file .git/MERGE_HEAD &&
+ git merge --abort
+ )
+'
+
+# Directory/submodule conflict
+# Commit O: <empty>
+# Commit A: path (submodule), with sole tracked file named 'world'
+# Commit B1: path/file
+# Commit B2: path/world
+#
+# Expected from merge of A & B1:
+# Contents under path/ from commit B1 are renamed elsewhere; we do not
+# want to write files from one of our tracked directories into a submodule
+#
+# Expected from merge of A & B2:
+# Similar to last merge, but with a slight twist: we don't want paths
+# under the submodule to be treated as untracked or in the way.
+
+test_expect_success 'setup directory/submodule conflict' '
+ test_create_repo directory-submodule &&
+ (
+ cd directory-submodule &&
+
+ git commit --allow-empty -m O &&
+
+ git branch A &&
+ git branch B1 &&
+ git branch B2 &&
+
+ git checkout B1 &&
+ mkdir path &&
+ echo contents >path/file &&
+ git add path/file &&
+ git commit -m B1 &&
+
+ git checkout B2 &&
+ mkdir path &&
+ echo contents >path/world &&
+ git add path/world &&
+ git commit -m B2 &&
+
+ git checkout A &&
+ test_create_repo path &&
+ test_commit -C path hello world &&
+ git submodule add ./path &&
+ git commit -m A
+ )
+'
+
+test_expect_failure 'directory/submodule conflict; keep submodule clean' '
+ test_when_finished "git -C directory-submodule reset --hard" &&
+ (
+ cd directory-submodule &&
+
+ git checkout A^0 &&
+ test_must_fail git merge B1^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 3 out &&
+ git ls-files -u >out &&
+ test_line_count = 1 out &&
+
+ # path/ is still a submodule
+ test_path_is_dir path/.git &&
+
+ echo Checking if contents from B1:path/file showed up &&
+ # Would rather use grep -r, but that is GNU extension...
+ git ls-files -co | xargs grep -q contents 2>/dev/null &&
+
+ # However, B1:path/file should NOT have shown up at path/file,
+ # because we should not write into the submodule
+ test_path_is_missing path/file
+ )
+'
+
+test_expect_failure !FAIL_PREREQS 'directory/submodule conflict; should not treat submodule files as untracked or in the way' '
+ test_when_finished "git -C directory-submodule/path reset --hard" &&
+ test_when_finished "git -C directory-submodule reset --hard" &&
+ (
+ cd directory-submodule &&
+
+ git checkout A^0 &&
+ test_must_fail git merge B2^0 >out 2>err &&
+
+ # We do not want files within the submodule to prevent the
+ # merge from starting; we should not be writing to such paths
+ # anyway.
+ test_i18ngrep ! "refusing to lose untracked file at" err
+ )
+'
+
+test_expect_failure 'directory/submodule conflict; merge --abort works afterward' '
+ test_when_finished "git -C directory-submodule/path reset --hard" &&
+ test_when_finished "git -C directory-submodule reset --hard" &&
+ (
+ cd directory-submodule &&
+
+ git checkout A^0 &&
+ test_must_fail git merge B2^0 &&
+ test_path_is_file .git/MERGE_HEAD &&
+ # merge --abort should succeed, should clear .git/MERGE_HEAD,
+ # and should not leave behind any conflicted files
+ git merge --abort &&
+ test_path_is_missing .git/MERGE_HEAD &&
+ git ls-files -u >conflicts &&
+ test_must_be_empty conflicts
+ )
'
test_done