#!/bin/sh

test_description='Merge-recursive merging renames'
. ./test-lib.sh

modify () {
        sed -e "$1" <"$2" >"$2.x" &&
        mv "$2.x" "$2"
}

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
        }
        test_cmp 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
        }
        test_cmp 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_expect_success 'setup for rename + d/f conflicts' '
        git reset --hard &&
        git checkout --orphan dir-in-way &&
        git rm -rf . &&

        mkdir sub &&
        mkdir dir &&
        printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >sub/file &&
        echo foo >dir/file-in-the-way &&
        git add -A &&
        git commit -m "Common commmit" &&

        echo 11 >>sub/file &&
        echo more >>dir/file-in-the-way &&
        git add -u &&
        git commit -m "Commit to merge, with dir in the way" &&

        git checkout -b dir-not-in-way &&
        git reset --soft HEAD^ &&
        git rm -rf dir &&
        git commit -m "Commit to merge, with dir removed" -- dir sub/file &&

        git checkout -b renamed-file-has-no-conflicts dir-in-way~1 &&
        git rm -rf dir &&
        git rm sub/file &&
        printf "1\n2\n3\n4\n5555\n6\n7\n8\n9\n10\n" >dir &&
        git add dir &&
        git commit -m "Independent change" &&

        git checkout -b renamed-file-has-conflicts dir-in-way~1 &&
        git rm -rf dir &&
        git mv sub/file dir &&
        echo 12 >>dir &&
        git add dir &&
        git commit -m "Conflicting change"
'

printf "1\n2\n3\n4\n5555\n6\n7\n8\n9\n10\n11\n" >expected

test_expect_success 'Rename+D/F conflict; renamed file merges + dir not in way' '
        git reset --hard &&
        git checkout -q renamed-file-has-no-conflicts^0 &&
        git merge --strategy=recursive dir-not-in-way &&
        git diff --quiet &&
        test -f dir &&
        test_cmp expected dir
'

test_expect_failure 'Rename+D/F conflict; renamed file merges but dir in way' '
        git reset --hard &&
        rm -rf dir~* &&
        git checkout -q renamed-file-has-no-conflicts^0 &&
        test_must_fail git merge --strategy=recursive dir-in-way >output &&

        grep "CONFLICT (delete/modify): dir/file-in-the-way" output &&
        grep "Auto-merging dir" output &&
        grep "Adding as dir~HEAD instead" output &&

        test 2 = "$(git ls-files -u | wc -l)" &&
        test 2 = "$(git ls-files -u dir/file-in-the-way | wc -l)" &&

        test_must_fail git diff --quiet &&
        test_must_fail git diff --cached --quiet &&

        test -f dir/file-in-the-way &&
        test -f dir~HEAD &&
        test_cmp expected dir~HEAD
'

cat >expected <<\EOF &&
1
2
3
4
5
6
7
8
9
10
<<<<<<< HEAD
12
=======
11
>>>>>>> dir-not-in-way
EOF

test_expect_failure 'Rename+D/F conflict; renamed file cannot merge, dir not in way' '
        git reset --hard &&
        rm -rf dir~* &&
        git checkout -q renamed-file-has-conflicts^0 &&
        test_must_fail git merge --strategy=recursive dir-not-in-way &&

        test 3 = "$(git ls-files -u | wc -l)" &&
        test 3 = "$(git ls-files -u dir | wc -l)" &&

        test_must_fail git diff --quiet &&
        test_must_fail git diff --cached --quiet &&

        test -f dir &&
        test_cmp expected dir
'

test_expect_failure 'Rename+D/F conflict; renamed file cannot merge and dir in the way' '
        modify s/dir-not-in-way/dir-in-way/ expected &&

        git reset --hard &&
        rm -rf dir~* &&
        git checkout -q renamed-file-has-conflicts^0 &&
        test_must_fail git merge --strategy=recursive dir-in-way &&

        test 5 = "$(git ls-files -u | wc -l)" &&
        test 3 = "$(git ls-files -u dir | grep -v file-in-the-way | wc -l)" &&
        test 2 = "$(git ls-files -u dir/file-in-the-way | wc -l)" &&

        test_must_fail git diff --quiet &&
        test_must_fail git diff --cached --quiet &&

        test -f dir/file-in-the-way &&
        test -f dir~HEAD &&
        test_cmp expected dir~HEAD
'

test_done