#!/bin/sh

test_description='read-tree -m -u checks working tree files'

. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-read-tree.sh

# two-tree test

test_expect_success 'two-way setup' '

        mkdir subdir &&
        echo >file1 file one &&
        echo >file2 file two &&
        echo >subdir/file1 file one in subdirectory &&
        echo >subdir/file2 file two in subdirectory &&
        git update-index --add file1 file2 subdir/file1 subdir/file2 &&
        git commit -m initial &&

        git branch side &&
        git tag -f branch-point &&

        echo file2 is not tracked on the master anymore &&
        rm -f file2 subdir/file2 &&
        git update-index --remove file2 subdir/file2 &&
        git commit -a -m "master removes file2 and subdir/file2"
'

test_expect_success 'two-way not clobbering' '

        echo >file2 master creates untracked file2 &&
        echo >subdir/file2 master creates untracked subdir/file2 &&
        if err=$(read_tree_u_must_succeed -m -u master side 2>&1)
        then
                echo should have complained
                false
        else
                echo "happy to see $err"
        fi
'

echo file2 >.gitignore

test_expect_success 'two-way with incorrect --exclude-per-directory (1)' '

        if err=$(read_tree_u_must_succeed -m --exclude-per-directory=.gitignore master side 2>&1)
        then
                echo should have complained
                false
        else
                echo "happy to see $err"
        fi
'

test_expect_success 'two-way with incorrect --exclude-per-directory (2)' '

        if err=$(read_tree_u_must_succeed -m -u --exclude-per-directory=foo --exclude-per-directory=.gitignore master side 2>&1)
        then
                echo should have complained
                false
        else
                echo "happy to see $err"
        fi
'

test_expect_success 'two-way clobbering a ignored file' '

        read_tree_u_must_succeed -m -u --exclude-per-directory=.gitignore master side
'

rm -f .gitignore

# three-tree test

test_expect_success 'three-way not complaining on an untracked path in both' '

        rm -f file2 subdir/file2 &&
        git checkout side &&
        echo >file3 file three &&
        echo >subdir/file3 file three &&
        git update-index --add file3 subdir/file3 &&
        git commit -a -m "side adds file3 and removes file2" &&

        git checkout master &&
        echo >file2 file two is untracked on the master side &&
        echo >subdir/file2 file two is untracked on the master side &&

        read_tree_u_must_succeed -m -u branch-point master side
'

test_expect_success 'three-way not clobbering a working tree file' '

        git reset --hard &&
        rm -f file2 subdir/file2 file3 subdir/file3 &&
        git checkout master &&
        echo >file3 file three created in master, untracked &&
        echo >subdir/file3 file three created in master, untracked &&
        if err=$(read_tree_u_must_succeed -m -u branch-point master side 2>&1)
        then
                echo should have complained
                false
        else
                echo "happy to see $err"
        fi
'

echo >.gitignore file3

test_expect_success 'three-way not complaining on an untracked file' '

        git reset --hard &&
        rm -f file2 subdir/file2 file3 subdir/file3 &&
        git checkout master &&
        echo >file3 file three created in master, untracked &&
        echo >subdir/file3 file three created in master, untracked &&

        read_tree_u_must_succeed -m -u --exclude-per-directory=.gitignore branch-point master side
'

test_expect_success '3-way not overwriting local changes (setup)' '

        git reset --hard &&
        git checkout -b side-a branch-point &&
        echo >>file1 "new line to be kept in the merge result" &&
        git commit -a -m "side-a changes file1" &&
        git checkout -b side-b branch-point &&
        echo >>file2 "new line to be kept in the merge result" &&
        git commit -a -m "side-b changes file2" &&
        git checkout side-a

'

test_expect_success '3-way not overwriting local changes (our side)' '

        # At this point, file1 from side-a should be kept as side-b
        # did not touch it.

        git reset --hard &&

        echo >>file1 "local changes" &&
        read_tree_u_must_succeed -m -u branch-point side-a side-b &&
        grep "new line to be kept" file1 &&
        grep "local changes" file1

'

test_expect_success '3-way not overwriting local changes (their side)' '

        # At this point, file2 from side-b should be taken as side-a
        # did not touch it.

        git reset --hard &&

        echo >>file2 "local changes" &&
        read_tree_u_must_fail -m -u branch-point side-a side-b &&
        ! grep "new line to be kept" file2 &&
        grep "local changes" file2

'

test_expect_success 'funny symlink in work tree' '

        git reset --hard &&
        git checkout -b sym-b side-b &&
        mkdir -p a &&
        >a/b &&
        git add a/b &&
        git commit -m "side adds a/b" &&

        rm -fr a &&
        git checkout -b sym-a side-a &&
        mkdir -p a &&
        test_ln_s_add ../b a/b &&
        git commit -m "we add a/b" &&

        read_tree_u_must_succeed -m -u sym-a sym-a sym-b

'

test_expect_success SANITY 'funny symlink in work tree, un-unlink-able' '

        rm -fr a b &&
        git reset --hard &&

        git checkout sym-a &&
        chmod a-w a &&
        test_must_fail git read-tree -m -u sym-a sym-a sym-b

'

# clean-up from the above test
chmod a+w a 2>/dev/null
rm -fr a b

test_expect_success 'D/F setup' '

        git reset --hard &&

        git checkout side-a &&
        rm -f subdir/file2 &&
        mkdir subdir/file2 &&
        echo qfwfq >subdir/file2/another &&
        git add subdir/file2/another &&
        test_tick &&
        git commit -m "side-a changes file2 to directory"

'

test_expect_success 'D/F' '

        git checkout side-b &&
        read_tree_u_must_succeed -m -u branch-point side-b side-a &&
        git ls-files -u >actual &&
        (
                a=$(git rev-parse branch-point:subdir/file2)
                b=$(git rev-parse side-a:subdir/file2/another)
                echo "100644 $a 1       subdir/file2"
                echo "100644 $a 2       subdir/file2"
                echo "100644 $b 3       subdir/file2/another"
        ) >expect &&
        test_cmp actual expect

'

test_expect_success 'D/F resolve' '

        git reset --hard &&
        git checkout side-b &&
        git merge-resolve branch-point -- side-b side-a

'

test_expect_success 'D/F recursive' '

        git reset --hard &&
        git checkout side-b &&
        git merge-recursive branch-point -- side-b side-a

'

test_done