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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#

test_description='Two way merge with read-tree -m -u $H $M

This is identical to t1001, but uses -u to update the work tree as well.

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

compare_change () {
sed >current \
-e '1{/^diff --git /d;}' \
-e '2{/^index /d;}' \
-e '/^--- /d; /^+++ /d; /^@@ /d;' \
-e 's/^\(.[0-7][0-7][0-7][0-7][0-7][0-7]\) '"$_x40"' /\1 X /' "$1"
test_cmp expected current
}

check_cache_at () {
clean_if_empty=`git diff-files -- "$1"`
case "$clean_if_empty" in
'') echo "$1: clean" ;;
?*) echo "$1: dirty" ;;
esac
case "$2,$clean_if_empty" in
clean,) : ;;
clean,?*) false ;;
dirty,) false ;;
dirty,?*) : ;;
esac
}

test_expect_success \
    setup \
    'echo frotz >frotz &&
echo nitfol >nitfol &&
echo bozbar >bozbar &&
echo rezrov >rezrov &&
git update-index --add nitfol bozbar rezrov &&
treeH=`git write-tree` &&
echo treeH $treeH &&
git ls-tree $treeH &&

echo gnusto >bozbar &&
git update-index --add frotz bozbar --force-remove rezrov &&
git ls-files --stage >M.out &&
treeM=`git write-tree` &&
echo treeM $treeM &&
git ls-tree $treeM &&
sum bozbar frotz nitfol >M.sum &&
git diff-tree $treeH $treeM'

test_expect_success \
    '1, 2, 3 - no carry forward' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >1-3.out &&
cmp M.out 1-3.out &&
sum bozbar frotz nitfol >actual3.sum &&
cmp M.sum actual3.sum &&
check_cache_at bozbar clean &&
check_cache_at frotz clean &&
check_cache_at nitfol clean'

test_expect_success \
    '4 - carry forward local addition.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo "+100644 X 0 yomin" >expected &&
echo yomin >yomin &&
git update-index --add yomin &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >4.out || return 1
git diff -U0 --no-index M.out 4.out >4diff.out
compare_change 4diff.out expected &&
check_cache_at yomin clean &&
sum bozbar frotz nitfol >actual4.sum &&
cmp M.sum actual4.sum &&
echo yomin >yomin1 &&
diff yomin yomin1 &&
rm -f yomin1'

test_expect_success \
    '5 - carry forward local addition.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
read_tree_u_must_succeed -m -u $treeH &&
echo yomin >yomin &&
git update-index --add yomin &&
echo yomin yomin >yomin &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >5.out || return 1
git diff -U0 --no-index M.out 5.out >5diff.out
compare_change 5diff.out expected &&
check_cache_at yomin dirty &&
sum bozbar frotz nitfol >actual5.sum &&
cmp M.sum actual5.sum &&
: dirty index should have prevented -u from checking it out. &&
echo yomin yomin >yomin1 &&
diff yomin yomin1 &&
rm -f yomin1'

test_expect_success \
    '6 - local addition already has the same.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo frotz >frotz &&
git update-index --add frotz &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >6.out &&
test_cmp M.out 6.out &&
check_cache_at frotz clean &&
sum bozbar frotz nitfol >actual3.sum &&
cmp M.sum actual3.sum &&
echo frotz >frotz1 &&
diff frotz frotz1 &&
rm -f frotz1'

test_expect_success \
    '7 - local addition already has the same.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo frotz >frotz &&
git update-index --add frotz &&
echo frotz frotz >frotz &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >7.out &&
test_cmp M.out 7.out &&
check_cache_at frotz dirty &&
sum bozbar frotz nitfol >actual7.sum &&
if cmp M.sum actual7.sum; then false; else :; fi &&
: dirty index should have prevented -u from checking it out. &&
echo frotz frotz >frotz1 &&
diff frotz frotz1 &&
rm -f frotz1'

test_expect_success \
    '8 - conflicting addition.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo frotz frotz >frotz &&
git update-index --add frotz &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

test_expect_success \
    '9 - conflicting addition.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo frotz frotz >frotz &&
git update-index --add frotz &&
echo frotz >frotz &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

test_expect_success \
    '10 - path removed.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo rezrov >rezrov &&
git update-index --add rezrov &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >10.out &&
cmp M.out 10.out &&
sum bozbar frotz nitfol >actual10.sum &&
cmp M.sum actual10.sum'

test_expect_success \
    '11 - dirty path removed.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo rezrov >rezrov &&
git update-index --add rezrov &&
echo rezrov rezrov >rezrov &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

test_expect_success \
    '12 - unmatching local changes being removed.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo rezrov rezrov >rezrov &&
git update-index --add rezrov &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

test_expect_success \
    '13 - unmatching local changes being removed.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo rezrov rezrov >rezrov &&
git update-index --add rezrov &&
echo rezrov >rezrov &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

cat >expected <<EOF
-100644 X 0 nitfol
+100644 X 0 nitfol
EOF

test_expect_success \
    '14 - unchanged in two heads.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo nitfol nitfol >nitfol &&
git update-index --add nitfol &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >14.out &&
test_must_fail git diff -U0 --no-index M.out 14.out >14diff.out &&
compare_change 14diff.out expected &&
sum bozbar frotz >actual14.sum &&
grep -v nitfol M.sum > expected14.sum &&
cmp expected14.sum actual14.sum &&
sum bozbar frotz nitfol >actual14a.sum &&
if cmp M.sum actual14a.sum; then false; else :; fi &&
check_cache_at nitfol clean &&
echo nitfol nitfol >nitfol1 &&
diff nitfol nitfol1 &&
rm -f nitfol1'

test_expect_success \
    '15 - unchanged in two heads.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo nitfol nitfol >nitfol &&
git update-index --add nitfol &&
echo nitfol nitfol nitfol >nitfol &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >15.out &&
test_must_fail git diff -U0 --no-index M.out 15.out >15diff.out &&
compare_change 15diff.out expected &&
check_cache_at nitfol dirty &&
sum bozbar frotz >actual15.sum &&
grep -v nitfol M.sum > expected15.sum &&
cmp expected15.sum actual15.sum &&
sum bozbar frotz nitfol >actual15a.sum &&
if cmp M.sum actual15a.sum; then false; else :; fi &&
echo nitfol nitfol nitfol >nitfol1 &&
diff nitfol nitfol1 &&
rm -f nitfol1'

test_expect_success \
    '16 - conflicting local change.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo bozbar bozbar >bozbar &&
git update-index --add bozbar &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

test_expect_success \
    '17 - conflicting local change.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo bozbar bozbar >bozbar &&
git update-index --add bozbar &&
echo bozbar bozbar bozbar >bozbar &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

test_expect_success \
    '18 - local change already having a good result.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo gnusto >bozbar &&
git update-index --add bozbar &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >18.out &&
test_cmp M.out 18.out &&
check_cache_at bozbar clean &&
sum bozbar frotz nitfol >actual18.sum &&
cmp M.sum actual18.sum'

test_expect_success \
    '19 - local change already having a good result, further modified.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo gnusto >bozbar &&
git update-index --add bozbar &&
echo gnusto gnusto >bozbar &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >19.out &&
test_cmp M.out 19.out &&
check_cache_at bozbar dirty &&
sum frotz nitfol >actual19.sum &&
grep -v bozbar M.sum > expected19.sum &&
cmp expected19.sum actual19.sum &&
sum bozbar frotz nitfol >actual19a.sum &&
if cmp M.sum actual19a.sum; then false; else :; fi &&
echo gnusto gnusto >bozbar1 &&
diff bozbar bozbar1 &&
rm -f bozbar1'

test_expect_success \
    '20 - no local change, use new tree.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo bozbar >bozbar &&
git update-index --add bozbar &&
read_tree_u_must_succeed -m -u $treeH $treeM &&
git ls-files --stage >20.out &&
test_cmp M.out 20.out &&
check_cache_at bozbar clean &&
sum bozbar frotz nitfol >actual20.sum &&
cmp M.sum actual20.sum'

test_expect_success \
    '21 - no local change, dirty cache.' \
    'rm -f .git/index nitfol bozbar rezrov frotz &&
read_tree_u_must_succeed --reset -u $treeH &&
echo bozbar >bozbar &&
git update-index --add bozbar &&
echo gnusto gnusto >bozbar &&
if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'

# Also make sure we did not break DF vs DF/DF case.
test_expect_success \
    'DF vs DF/DF case setup.' \
    'rm -f .git/index &&
echo DF >DF &&
git update-index --add DF &&
treeDF=`git write-tree` &&
echo treeDF $treeDF &&
git ls-tree $treeDF &&

rm -f DF &&
mkdir DF &&
echo DF/DF >DF/DF &&
git update-index --add --remove DF DF/DF &&
treeDFDF=`git write-tree` &&
echo treeDFDF $treeDFDF &&
git ls-tree $treeDFDF &&
git ls-files --stage >DFDF.out'

test_expect_success \
    'DF vs DF/DF case test.' \
    'rm -f .git/index &&
rm -fr DF &&
echo DF >DF &&
git update-index --add DF &&
read_tree_u_must_succeed -m -u $treeDF $treeDFDF &&
git ls-files --stage >DFDFcheck.out &&
test_cmp DFDF.out DFDFcheck.out &&
check_cache_at DF/DF clean'

test_done
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