#!/bin/sh

test_description='merging with large rename matrix'
. ./test-lib.sh

count() {
        i=1
        while test $i -le $1; do
                echo $i
                i=$(($i + 1))
        done
}

test_expect_success 'setup (initial)' '
        touch file &&
        git add . &&
        git commit -m initial &&
        git tag initial
'

make_text() {
        echo $1: $2
        for i in $(count 20); do
                echo $1: $i
        done
        echo $1: $3
}

test_rename() {
        test_expect_success "rename ($1, $2)" '
        n='$1' &&
        expect='$2' &&
        git checkout -f master &&
        test_might_fail git branch -D test$n &&
        git reset --hard initial &&
        for i in $(count $n); do
                make_text $i initial initial >$i
        done &&
        git add . &&
        git commit -m add=$n &&
        for i in $(count $n); do
                make_text $i changed initial >$i
        done &&
        git commit -a -m change=$n &&
        git checkout -b test$n HEAD^ &&
        for i in $(count $n); do
                git rm $i
                make_text $i initial changed >$i.moved
        done &&
        git add . &&
        git commit -m change+rename=$n &&
        case "$expect" in
                ok) git merge master ;;
                 *) test_must_fail git merge master ;;
        esac
        '
}

test_rename 5 ok

test_expect_success 'set diff.renamelimit to 4' '
        git config diff.renamelimit 4
'
test_rename 4 ok
test_rename 5 fail

test_expect_success 'set merge.renamelimit to 5' '
        git config merge.renamelimit 5
'
test_rename 5 ok
test_rename 6 fail

test_expect_success 'setup large simple rename' '
        git config --unset merge.renamelimit &&
        git config --unset diff.renamelimit &&

        git reset --hard initial &&
        for i in $(count 200); do
                make_text foo bar baz >$i
        done &&
        git add . &&
        git commit -m create-files &&

        git branch simple-change &&
        git checkout -b simple-rename &&

        mkdir builtin &&
        git mv [0-9]* builtin/ &&
        git commit -m renamed &&

        git checkout simple-change &&
        >unrelated-change &&
        git add unrelated-change &&
        git commit -m unrelated-change
'

test_expect_success 'massive simple rename does not spam added files' '
        sane_unset GIT_MERGE_VERBOSITY &&
        git merge --no-stat simple-rename | grep -v Removing >output &&
        test_line_count -lt 5 output
'

test_done