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Junio C Hamano 724b511d4f merge-recursive: conflicting rename case.

This changes the way the case two branches rename the same path
to different paths is handled.  Earlier, the code removed the
original path and added both destinations to the index at
stage0.  This commit changes it to leave the original path at
stage1, and two destination paths at stage2 and stage3,
respectively.

[jc: I am not really sure if this makes much difference in the
real life merge situations.  What should happen when our branch
renames A to B and M to N, while their branch renames A to M?
That is, M remains in our tree as is.]

Signed-off-by: Junio C Hamano <junkio@cox.net>

2005-12-21 22:34:59 -08:00

201 lines

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 #!/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 &&
 git branch white &&
 git branch red &&
 git branch blue &&
 sed -e "/^g /s/.*/g : master changes a line/" <A >A+ &&
 mv A+ A &&
 git commit -a -m "master updates A" &&
 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 master'
 test_expect_success 'pull renaming branch into unrenaming one' \
 '
 	git show-branch
 	git pull . white && {
 		echo "BAD: should have conflicted"
 		exit 1
 	}
 	git ls-files -s
 	test "$(git ls-files -u B | wc -l)" -eq 3 || {
 		echo "BAD: should have left stages for B"
 		exit 1
 	}
 	test "$(git ls-files -s N | wc -l)" -eq 1 || {
 		echo "BAD: should have merged N"
 		exit 1
 	}
 	sed -ne "/^g/{
 	p
 	q
 	}" B | grep master || {
 		echo "BAD: should have listed our change first"
 		exit 1
 	}
 	test "$(git diff white N | wc -l)" -eq 0 || {
 		echo "BAD: should have taken colored branch"
 		exit 1
 	}
 '
 test_expect_success 'pull renaming branch into another renaming one' \
 '
 	git reset --hard
 	git checkout red
 	git pull . white && {
 		echo "BAD: should have conflicted"
 		exit 1
 	}
 	test "$(git ls-files -u B | wc -l)" -eq 3 || {
 		echo "BAD: should have left stages"
 		exit 1
 	}
 	test "$(git ls-files -s N | wc -l)" -eq 1 || {
 		echo "BAD: should have merged N"
 		exit 1
 	}
 	sed -ne "/^g/{
 	p
 	q
 	}" B | grep red || {
 		echo "BAD: should have listed our change first"
 		exit 1
 	}
 	test "$(git diff white N | wc -l)" -eq 0 || {
 		echo "BAD: should have taken colored branch"
 		exit 1
 	}
 '
 test_expect_success 'pull unrenaming branch into renaming one' \
 '
 	git reset --hard
 	git show-branch
 	git pull . master && {
 		echo "BAD: should have conflicted"
 		exit 1
 	}
 	test "$(git ls-files -u B | wc -l)" -eq 3 || {
 		echo "BAD: should have left stages"
 		exit 1
 	}
 	test "$(git ls-files -s N | wc -l)" -eq 1 || {
 		echo "BAD: should have merged N"
 		exit 1
 	}
 	sed -ne "/^g/{
 	p
 	q
 	}" B | grep red || {
 		echo "BAD: should have listed our change first"
 		exit 1
 	}
 	test "$(git diff white N | wc -l)" -eq 0 || {
 		echo "BAD: should have taken colored branch"
 		exit 1
 	}
 '
 test_expect_success 'pull conflicting renames' \
 '
 	git reset --hard
 	git show-branch
 	git pull . blue && {
 		echo "BAD: should have conflicted"
 		exit 1
 	}
 	test "$(git ls-files -u A | wc -l)" -eq 1 || {
 		echo "BAD: should have left a stage"
 		exit 1
 	}
 	test "$(git ls-files -u B | wc -l)" -eq 1 || {
 		echo "BAD: should have left a stage"
 		exit 1
 	}
 	test "$(git ls-files -u C | wc -l)" -eq 1 || {
 		echo "BAD: should have left a stage"
 		exit 1
 	}
 	test "$(git ls-files -s N | wc -l)" -eq 1 || {
 		echo "BAD: should have merged N"
 		exit 1
 	}
 	sed -ne "/^g/{
 	p
 	q
 	}" B | grep red || {
 		echo "BAD: should have listed our change first"
 		exit 1
 	}
 	test "$(git diff white N | wc -l)" -eq 0 || {
 		echo "BAD: should have taken colored branch"
 		exit 1
 	}
 '
 test_done