1 files changed, 344 insertions, 0 deletions
diff --git a/t/t6022-merge-rename.sh b/t/t6022-merge-rename.sh
new file mode 100755
index 0000000000..e3f7ae8120
--- /dev/null
+++ b/t/t6022-merge-rename.sh
@@ -0,0 +1,344 @@
+#!/bin/sh
+
+test_description='Merge-recursive merging renames'
+. ./test-lib.sh
+
+test_expect_success setup \
+'
+cat >A <<\EOF &&
+a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+b bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+c cccccccccccccccccccccccccccccccccccccccccccccccc
+d dddddddddddddddddddddddddddddddddddddddddddddddd
+e eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
+f ffffffffffffffffffffffffffffffffffffffffffffffff
+g gggggggggggggggggggggggggggggggggggggggggggggggg
+h hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
+i iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
+j jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
+k kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
+l llllllllllllllllllllllllllllllllllllllllllllllll
+m mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
+n nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
+o oooooooooooooooooooooooooooooooooooooooooooooooo
+EOF
+
+cat >M <<\EOF &&
+A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+B BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
+C CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
+D DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
+E EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
+F FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
+G GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
+H HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
+I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
+J JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
+K KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
+L LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
+M MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
+N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
+O OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
+EOF
+
+git add A M &&
+git commit -m "initial has A and M" &&
+git branch white &&
+git branch red &&
+git branch blue &&
+git branch yellow &&
+git branch change &&
+git branch change+rename &&
+
+sed -e "/^g /s/.*/g : master changes a line/" <A >A+ &&
+mv A+ A &&
+git commit -a -m "master updates A" &&
+
+git checkout yellow &&
+rm -f M &&
+git commit -a -m "yellow removes M" &&
+
+git checkout white &&
+sed -e "/^g /s/.*/g : white changes a line/" <A >B &&
+sed -e "/^G /s/.*/G : colored branch changes a line/" <M >N &&
+rm -f A M &&
+git update-index --add --remove A B M N &&
+git commit -m "white renames A->B, M->N" &&
+
+git checkout red &&
+sed -e "/^g /s/.*/g : red changes a line/" <A >B &&
+sed -e "/^G /s/.*/G : colored branch changes a line/" <M >N &&
+rm -f A M &&
+git update-index --add --remove A B M N &&
+git commit -m "red renames A->B, M->N" &&
+
+git checkout blue &&
+sed -e "/^g /s/.*/g : blue changes a line/" <A >C &&
+sed -e "/^G /s/.*/G : colored branch changes a line/" <M >N &&
+rm -f A M &&
+git update-index --add --remove A C M N &&
+git commit -m "blue renames A->C, M->N" &&
+
+git checkout change &&
+sed -e "/^g /s/.*/g : changed line/" <A >A+ &&
+mv A+ A &&
+git commit -q -a -m "changed" &&
+
+git checkout change+rename &&
+sed -e "/^g /s/.*/g : changed line/" <A >B &&
+rm A &&
+git update-index --add B &&
+git commit -q -a -m "changed and renamed" &&
+
+git checkout master'
+
+test_expect_success 'pull renaming branch into unrenaming one' \
+'
+	git show-branch
+	git pull . white && {
+		echo "BAD: should have conflicted"
+		return 1
+	}
+	git ls-files -s
+	test "$(git ls-files -u B | wc -l)" -eq 3 || {
+		echo "BAD: should have left stages for B"
+		return 1
+	}
+	test "$(git ls-files -s N | wc -l)" -eq 1 || {
+		echo "BAD: should have merged N"
+		return 1
+	}
+	sed -ne "/^g/{
+	p
+	q
+	}" B | grep master || {
+		echo "BAD: should have listed our change first"
+		return 1
+	}
+	test "$(git diff white N | wc -l)" -eq 0 || {
+		echo "BAD: should have taken colored branch"
+		return 1
+	}
+'
+
+test_expect_success 'pull renaming branch into another renaming one' \
+'
+	rm -f B
+	git reset --hard
+	git checkout red
+	git pull . white && {
+		echo "BAD: should have conflicted"
+		return 1
+	}
+	test "$(git ls-files -u B | wc -l)" -eq 3 || {
+		echo "BAD: should have left stages"
+		return 1
+	}
+	test "$(git ls-files -s N | wc -l)" -eq 1 || {
+		echo "BAD: should have merged N"
+		return 1
+	}
+	sed -ne "/^g/{
+	p
+	q
+	}" B | grep red || {
+		echo "BAD: should have listed our change first"
+		return 1
+	}
+	test "$(git diff white N | wc -l)" -eq 0 || {
+		echo "BAD: should have taken colored branch"
+		return 1
+	}
+'
+
+test_expect_success 'pull unrenaming branch into renaming one' \
+'
+	git reset --hard
+	git show-branch
+	git pull . master && {
+		echo "BAD: should have conflicted"
+		return 1
+	}
+	test "$(git ls-files -u B | wc -l)" -eq 3 || {
+		echo "BAD: should have left stages"
+		return 1
+	}
+	test "$(git ls-files -s N | wc -l)" -eq 1 || {
+		echo "BAD: should have merged N"
+		return 1
+	}
+	sed -ne "/^g/{
+	p
+	q
+	}" B | grep red || {
+		echo "BAD: should have listed our change first"
+		return 1
+	}
+	test "$(git diff white N | wc -l)" -eq 0 || {
+		echo "BAD: should have taken colored branch"
+		return 1
+	}
+'
+
+test_expect_success 'pull conflicting renames' \
+'
+	git reset --hard
+	git show-branch
+	git pull . blue && {
+		echo "BAD: should have conflicted"
+		return 1
+	}
+	test "$(git ls-files -u A | wc -l)" -eq 1 || {
+		echo "BAD: should have left a stage"
+		return 1
+	}
+	test "$(git ls-files -u B | wc -l)" -eq 1 || {
+		echo "BAD: should have left a stage"
+		return 1
+	}
+	test "$(git ls-files -u C | wc -l)" -eq 1 || {
+		echo "BAD: should have left a stage"
+		return 1
+	}
+	test "$(git ls-files -s N | wc -l)" -eq 1 || {
+		echo "BAD: should have merged N"
+		return 1
+	}
+	sed -ne "/^g/{
+	p
+	q
+	}" B | grep red || {
+		echo "BAD: should have listed our change first"
+		return 1
+	}
+	test "$(git diff white N | wc -l)" -eq 0 || {
+		echo "BAD: should have taken colored branch"
+		return 1
+	}
+'
+
+test_expect_success 'interference with untracked working tree file' '
+
+	git reset --hard
+	git show-branch
+	echo >A this file should not matter
+	git pull . white && {
+		echo "BAD: should have conflicted"
+		return 1
+	}
+	test -f A || {
+		echo "BAD: should have left A intact"
+		return 1
+	}
+'
+
+test_expect_success 'interference with untracked working tree file' '
+
+	git reset --hard
+	git checkout white
+	git show-branch
+	rm -f A
+	echo >A this file should not matter
+	git pull . red && {
+		echo "BAD: should have conflicted"
+		return 1
+	}
+	test -f A || {
+		echo "BAD: should have left A intact"
+		return 1
+	}
+'
+
+test_expect_success 'interference with untracked working tree file' '
+
+	git reset --hard
+	rm -f A M
+	git checkout -f master
+	git tag -f anchor
+	git show-branch
+	git pull . yellow || {
+		echo "BAD: should have cleanly merged"
+		return 1
+	}
+	test -f M && {
+		echo "BAD: should have removed M"
+		return 1
+	}
+	git reset --hard anchor
+'
+
+test_expect_success 'updated working tree file should prevent the merge' '
+
+	git reset --hard
+	rm -f A M
+	git checkout -f master
+	git tag -f anchor
+	git show-branch
+	echo >>M one line addition
+	cat M >M.saved
+	git pull . yellow && {
+		echo "BAD: should have complained"
+		return 1
+	}
+	diff M M.saved || {
+		echo "BAD: should have left M intact"
+		return 1
+	}
+	rm -f M.saved
+'
+
+test_expect_success 'updated working tree file should prevent the merge' '
+
+	git reset --hard
+	rm -f A M
+	git checkout -f master
+	git tag -f anchor
+	git show-branch
+	echo >>M one line addition
+	cat M >M.saved
+	git update-index M
+	git pull . yellow && {
+		echo "BAD: should have complained"
+		return 1
+	}
+	diff M M.saved || {
+		echo "BAD: should have left M intact"
+		return 1
+	}
+	rm -f M.saved
+'
+
+test_expect_success 'interference with untracked working tree file' '
+
+	git reset --hard
+	rm -f A M
+	git checkout -f yellow
+	git tag -f anchor
+	git show-branch
+	echo >M this file should not matter
+	git pull . master || {
+		echo "BAD: should have cleanly merged"
+		return 1
+	}
+	test -f M || {
+		echo "BAD: should have left M intact"
+		return 1
+	}
+	git ls-files -s | grep M && {
+		echo "BAD: M must be untracked in the result"
+		return 1
+	}
+	git reset --hard anchor
+'
+
+test_expect_success 'merge of identical changes in a renamed file' '
+	rm -f A M N
+	git reset --hard &&
+	git checkout change+rename &&
+	GIT_MERGE_VERBOSITY=3 git merge change | grep "^Skipped B" &&
+	git reset --hard HEAD^ &&
+	git checkout change &&
+	GIT_MERGE_VERBOSITY=3 git merge change+rename | grep "^Skipped B"
+'
+
+test_done