#!/bin/sh

test_description='CRLF merge conflict across text=auto change

* [master] remove .gitattributes
 ! [side] add line from b
--
 + [side] add line from b
*  [master] remove .gitattributes
*  [master^] add line from a
*  [master~2] normalize file
*+ [side^] Initial
'

. ./test-lib.sh

test_have_prereq SED_STRIPS_CR && SED_OPTIONS=-b

compare_files () {
        tr '\015\000' QN <"$1" >"$1".expect &&
        tr '\015\000' QN <"$2" >"$2".actual &&
        test_cmp "$1".expect "$2".actual &&
        rm "$1".expect "$2".actual
}

test_expect_success setup '
        git config core.autocrlf false &&

        echo first line | append_cr >file &&
        echo first line >control_file &&
        echo only line >inert_file &&

        git add file control_file inert_file &&
        test_tick &&
        git commit -m "Initial" &&
        git tag initial &&
        git branch side &&

        echo "* text=auto" >.gitattributes &&
        echo first line >file &&
        git add .gitattributes file &&
        test_tick &&
        git commit -m "normalize file" &&

        echo same line | append_cr >>file &&
        echo same line >>control_file &&
        git add file control_file &&
        test_tick &&
        git commit -m "add line from a" &&
        git tag a &&

        git rm .gitattributes &&
        rm file &&
        git checkout file &&
        test_tick &&
        git commit -m "remove .gitattributes" &&
        git tag c &&

        git checkout side &&
        echo same line | append_cr >>file &&
        echo same line >>control_file &&
        git add file control_file &&
        test_tick &&
        git commit -m "add line from b" &&
        git tag b &&

        git checkout master
'

test_expect_success 'set up fuzz_conflict() helper' '
        fuzz_conflict() {
                sed $SED_OPTIONS -e "s/^\([<>=]......\) .*/\1/" "$@"
        }
'

test_expect_success 'Merge after setting text=auto' '
        cat <<-\EOF >expected &&
        first line
        same line
        EOF

        if test_have_prereq NATIVE_CRLF; then
                append_cr <expected >expected.temp &&
                mv expected.temp expected
        fi &&
        git config merge.renormalize true &&
        git rm -fr . &&
        rm -f .gitattributes &&
        git reset --hard a &&
        git merge b &&
        compare_files expected file
'

test_expect_success 'Merge addition of text=auto eol=LF' '
        git config core.eol lf &&
        cat <<-\EOF >expected &&
        first line
        same line
        EOF

        git config merge.renormalize true &&
        git rm -fr . &&
        rm -f .gitattributes &&
        git reset --hard b &&
        git merge a &&
        compare_files  expected file
'

test_expect_success 'Merge addition of text=auto eol=CRLF' '
        git config core.eol crlf &&
        cat <<-\EOF >expected &&
        first line
        same line
        EOF

        append_cr <expected >expected.temp &&
        mv expected.temp expected &&
        git config merge.renormalize true &&
        git rm -fr . &&
        rm -f .gitattributes &&
        git reset --hard b &&
        echo >&2 "After git reset --hard b" &&
        git ls-files -s --eol >&2 &&
        git merge a &&
        compare_files  expected file
'

test_expect_success 'Detect CRLF/LF conflict after setting text=auto' '
        git config core.eol native &&
        echo "<<<<<<<" >expected &&
        echo first line >>expected &&
        echo same line >>expected &&
        echo ======= >>expected &&
        echo first line | append_cr >>expected &&
        echo same line | append_cr >>expected &&
        echo ">>>>>>>" >>expected &&
        git config merge.renormalize false &&
        rm -f .gitattributes &&
        git reset --hard a &&
        test_must_fail git merge b &&
        fuzz_conflict file >file.fuzzy &&
        compare_files expected file.fuzzy
'

test_expect_success 'Detect LF/CRLF conflict from addition of text=auto' '
        echo "<<<<<<<" >expected &&
        echo first line | append_cr >>expected &&
        echo same line | append_cr >>expected &&
        echo ======= >>expected &&
        echo first line >>expected &&
        echo same line >>expected &&
        echo ">>>>>>>" >>expected &&
        git config merge.renormalize false &&
        rm -f .gitattributes &&
        git reset --hard b &&
        test_must_fail git merge a &&
        fuzz_conflict file >file.fuzzy &&
        compare_files expected file.fuzzy
'

test_expect_failure 'checkout -m after setting text=auto' '
        cat <<-\EOF >expected &&
        first line
        same line
        EOF

        git config merge.renormalize true &&
        git rm -fr . &&
        rm -f .gitattributes &&
        git reset --hard initial &&
        git checkout a -- . &&
        git checkout -m b &&
        compare_files expected file
'

test_expect_failure 'checkout -m addition of text=auto' '
        cat <<-\EOF >expected &&
        first line
        same line
        EOF

        git config merge.renormalize true &&
        git rm -fr . &&
        rm -f .gitattributes file &&
        git reset --hard initial &&
        git checkout b -- . &&
        git checkout -m a &&
        compare_files expected file
'

test_expect_failure 'cherry-pick patch from after text=auto was added' '
        append_cr <<-\EOF >expected &&
        first line
        same line
        EOF

        git config merge.renormalize true &&
        git rm -fr . &&
        git reset --hard b &&
        test_must_fail git cherry-pick a >err 2>&1 &&
        grep "[Nn]othing added" err &&
        compare_files expected file
'

test_expect_success 'Test delete/normalize conflict' '
        git checkout -f side &&
        git rm -fr . &&
        rm -f .gitattributes &&
        git reset --hard initial &&
        git rm file &&
        git commit -m "remove file" &&
        git checkout master &&
        git reset --hard a^ &&
        git merge side
'

test_done