Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 417 insertions, 0 deletions

diff --git a/t/t1001-read-tree-m-2way.sh b/t/t1001-read-tree-m-2way.sh
new file mode 100755
index 000000000000..1057a96b2498
--- /dev/null
+++ b/t/t1001-read-tree-m-2way.sh
@@ -0,0 +1,417 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+
+test_description='Two way merge with read-tree -m $H $M
+
+This test tries two-way merge (aka fast-forward with carry forward).
+
+There is the head (called H) and another commit (called M), which is
+simply ahead of H.  The index and the work tree contains a state that
+is derived from H, but may also have local changes.  This test checks
+all the combinations described in the two-tree merge "carry forward"
+rules, found in <Documentation/git read-tree.txt>.
+
+In the test, these paths are used:
+	bozbar  - in H, stays in M, modified from bozbar to gnusto
+	frotz   - not in H added in M
+	nitfol  - in H, stays in M unmodified
+	rezrov  - in H, deleted in M
+	yomin   - not in H or M
+'
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-read-tree.sh
+
+read_tree_twoway () {
+    git read-tree -m "$1" "$2" && git ls-files --stage
+}
+
+compare_change () {
+	sed -n >current \
+	    -e '/^--- /d; /^+++ /d; /^@@ /d;' \
+	    -e 's/^\([-+][0-7][0-7][0-7][0-7][0-7][0-7]\) '"$OID_REGEX"' /\1 X /p' \
+	    "$1"
+	test_cmp expected current
+}
+
+check_cache_at () {
+	clean_if_empty=$(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
+}
+
+cat >bozbar-old <<\EOF
+This is a sample file used in two-way fast-forward merge
+tests.  Its second line ends with a magic word bozbar
+which will be modified by the merged head to gnusto.
+It has some extra lines so that external tools can
+successfully merge independent changes made to later
+lines (such as this one), avoiding line conflicts.
+EOF
+
+sed -e 's/bozbar/gnusto (earlier bozbar)/' bozbar-old >bozbar-new
+
+test_expect_success 'setup' '
+	echo frotz >frotz &&
+	echo nitfol >nitfol &&
+	cat bozbar-old >bozbar &&
+	echo rezrov >rezrov &&
+	echo yomin >yomin &&
+	git update-index --add nitfol bozbar rezrov &&
+	treeH=$(git write-tree) &&
+	echo treeH $treeH &&
+	git ls-tree $treeH &&
+
+	cat bozbar-new >bozbar &&
+	git update-index --add frotz bozbar --force-remove rezrov &&
+	git ls-files --stage >M.out &&
+	treeM=$(git write-tree) &&
+	echo treeM $treeM &&
+	git ls-tree $treeM &&
+	git diff-tree $treeH $treeM
+'
+
+test_expect_success '1, 2, 3 - no carry forward' '
+	rm -f .git/index &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >1-3.out &&
+	test_cmp M.out 1-3.out &&
+	check_cache_at bozbar dirty &&
+	check_cache_at frotz dirty &&
+	check_cache_at nitfol dirty
+'
+echo '+100644 X 0	yomin' >expected
+
+test_expect_success '4 - carry forward local addition.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	git update-index --add yomin &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >4.out &&
+	test_must_fail git diff --no-index M.out 4.out >4diff.out &&
+	compare_change 4diff.out expected &&
+	check_cache_at yomin clean
+'
+
+test_expect_success '5 - carry forward local addition.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo yomin >yomin &&
+	git update-index --add yomin &&
+	echo yomin yomin >yomin &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >5.out &&
+	test_must_fail git diff --no-index M.out 5.out >5diff.out &&
+	compare_change 5diff.out expected &&
+	check_cache_at yomin dirty
+'
+
+test_expect_success '6 - local addition already has the same.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	git update-index --add frotz &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >6.out &&
+	test_cmp M.out 6.out &&
+	check_cache_at frotz clean
+'
+
+test_expect_success '7 - local addition already has the same.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo frotz >frotz &&
+	git update-index --add frotz &&
+	echo frotz frotz >frotz &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >7.out &&
+	test_cmp M.out 7.out &&
+	check_cache_at frotz dirty
+'
+
+test_expect_success '8 - conflicting addition.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo frotz frotz >frotz &&
+	git update-index --add frotz &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '9 - conflicting addition.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo frotz frotz >frotz &&
+	git update-index --add frotz &&
+	echo frotz >frotz &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '10 - path removed.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo rezrov >rezrov &&
+	git update-index --add rezrov &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >10.out &&
+	test_cmp M.out 10.out
+'
+
+test_expect_success '11 - dirty path removed.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo rezrov >rezrov &&
+	git update-index --add rezrov &&
+	echo rezrov rezrov >rezrov &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '12 - unmatching local changes being removed.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo rezrov rezrov >rezrov &&
+	git update-index --add rezrov &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '13 - unmatching local changes being removed.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo rezrov rezrov >rezrov &&
+	git update-index --add rezrov &&
+	echo rezrov >rezrov &&
+	if read_tree_twoway $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 &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo nitfol nitfol >nitfol &&
+	git update-index --add nitfol &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >14.out &&
+	test_must_fail git diff --no-index M.out 14.out >14diff.out &&
+	compare_change 14diff.out expected &&
+	check_cache_at nitfol clean
+'
+
+test_expect_success '15 - unchanged in two heads.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo nitfol nitfol >nitfol &&
+	git update-index --add nitfol &&
+	echo nitfol nitfol nitfol >nitfol &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >15.out &&
+	test_must_fail git diff --no-index M.out 15.out >15diff.out &&
+	compare_change 15diff.out expected &&
+	check_cache_at nitfol dirty
+'
+
+test_expect_success '16 - conflicting local change.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo bozbar bozbar >bozbar &&
+	git update-index --add bozbar &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '17 - conflicting local change.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	echo bozbar bozbar >bozbar &&
+	git update-index --add bozbar &&
+	echo bozbar bozbar bozbar >bozbar &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '18 - local change already having a good result.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	cat bozbar-new >bozbar &&
+	git update-index --add bozbar &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >18.out &&
+	test_cmp M.out 18.out &&
+	check_cache_at bozbar clean
+'
+
+test_expect_success '19 - local change already having a good result, further modified.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	cat bozbar-new >bozbar &&
+	git update-index --add bozbar &&
+	echo gnusto gnusto >bozbar &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >19.out &&
+	test_cmp M.out 19.out &&
+	check_cache_at bozbar dirty
+'
+
+test_expect_success '20 - no local change, use new tree.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	cat bozbar-old >bozbar &&
+	git update-index --add bozbar &&
+	read_tree_twoway $treeH $treeM &&
+	git ls-files --stage >20.out &&
+	test_cmp M.out 20.out &&
+	check_cache_at bozbar dirty
+'
+
+test_expect_success '21 - no local change, dirty cache.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	cat bozbar-old >bozbar &&
+	git update-index --add bozbar &&
+	echo gnusto gnusto >bozbar &&
+	if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+# This fails with straight two-way fast-forward.
+test_expect_success '22 - local change cache updated.' '
+	rm -f .git/index &&
+	read_tree_must_succeed $treeH &&
+	git checkout-index -u -f -q -a &&
+	sed -e "s/such as/SUCH AS/" bozbar-old >bozbar &&
+	git update-index --add bozbar &&
+	if read_tree_twoway $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_twoway $treeDF $treeDFDF &&
+	git ls-files --stage >DFDFcheck.out &&
+	test_cmp DFDF.out DFDFcheck.out &&
+	check_cache_at DF/DF dirty &&
+	:
+'
+
+test_expect_success 'a/b (untracked) vs a case setup.' '
+	rm -f .git/index &&
+	: >a &&
+	git update-index --add a &&
+	treeM=$(git write-tree) &&
+	echo treeM $treeM &&
+	git ls-tree $treeM &&
+	git ls-files --stage >treeM.out &&
+
+	rm -f a &&
+	git update-index --remove a &&
+	mkdir a &&
+	: >a/b &&
+	treeH=$(git write-tree) &&
+	echo treeH $treeH &&
+	git ls-tree $treeH
+'
+
+test_expect_success 'a/b (untracked) vs a, plus c/d case test.' '
+	read_tree_u_must_fail -u -m "$treeH" "$treeM" &&
+	git ls-files --stage &&
+	test -f a/b
+'
+
+test_expect_success 'read-tree supports the super-prefix' '
+	cat <<-EOF >expect &&
+		error: Updating '\''fictional/a'\'' would lose untracked files in it
+	EOF
+	test_must_fail git --super-prefix fictional/ read-tree -u -m "$treeH" "$treeM" 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'a/b vs a, plus c/d case setup.' '
+	rm -f .git/index &&
+	rm -fr a &&
+	: >a &&
+	mkdir c &&
+	: >c/d &&
+	git update-index --add a c/d &&
+	treeM=$(git write-tree) &&
+	echo treeM $treeM &&
+	git ls-tree $treeM &&
+	git ls-files --stage >treeM.out &&
+
+	rm -f a &&
+	mkdir a &&
+	: >a/b &&
+	git update-index --add --remove a a/b &&
+	treeH=$(git write-tree) &&
+	echo treeH $treeH &&
+	git ls-tree $treeH
+'
+
+test_expect_success 'a/b vs a, plus c/d case test.' '
+	read_tree_u_must_succeed -u -m "$treeH" "$treeM" &&
+	git ls-files --stage | tee >treeMcheck.out &&
+	test_cmp treeM.out treeMcheck.out
+'
+
+test_expect_success '-m references the correct modified tree' '
+	echo >file-a &&
+	echo >file-b &&
+	git add file-a file-b &&
+	git commit -a -m "test for correct modified tree" &&
+	git branch initial-mod &&
+	echo b >file-b &&
+	git commit -a -m "B" &&
+	echo a >file-a &&
+	git add file-a &&
+	git ls-tree $(git write-tree) file-a >expect &&
+	read_tree_must_succeed -m HEAD initial-mod &&
+	git ls-tree $(git write-tree) file-a >actual &&
+	test_cmp expect actual
+'
+
+test_done