Squashed 'third_party/git/' content from commit cb71568594

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

1 files changed, 297 insertions, 0 deletions

diff --git a/t/t4019-diff-wserror.sh b/t/t4019-diff-wserror.sh
new file mode 100755
index 000000000000..c6135c75488f
--- /dev/null
+++ b/t/t4019-diff-wserror.sh
@@ -0,0 +1,297 @@
+#!/bin/sh
+
+test_description='diff whitespace error detection'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	git config diff.color.whitespace "blue reverse" &&
+	>F &&
+	git add F &&
+	echo "         Eight SP indent" >>F &&
+	echo " 	HT and SP indent" >>F &&
+	echo "With trailing SP " >>F &&
+	echo "Carriage ReturnQ" | tr Q "\015" >>F &&
+	echo "No problem" >>F &&
+	echo >>F
+
+'
+
+blue_grep='7;34m' ;# ESC [ 7 ; 3 4 m
+
+printf "\033[%s" "$blue_grep" >check-grep
+if (grep "$blue_grep" <check-grep | grep "$blue_grep") >/dev/null 2>&1
+then
+	grep_a=grep
+elif (grep -a "$blue_grep" <check-grep | grep -a "$blue_grep") >/dev/null 2>&1
+then
+	grep_a='grep -a'
+else
+	grep_a=grep ;# expected to fail...
+fi
+rm -f check-grep
+
+prepare_output () {
+	git diff --color >output
+	$grep_a "$blue_grep" output >error
+	$grep_a -v "$blue_grep" output >normal
+	return 0
+}
+
+test_expect_success default '
+
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return error >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'default (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F whitespace" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight error >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return error >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'default, tabwidth=10 (attribute)' '
+
+	git config core.whitespace "tabwidth=10" &&
+	echo "F whitespace" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return error >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'no check (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F -whitespace" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'no check, tabwidth=10 (attribute), must be irrelevant' '
+
+	git config core.whitespace "tabwidth=10" &&
+	echo "F -whitespace" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'without -trail' '
+
+	rm -f .gitattributes &&
+	git config core.whitespace -trail &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'without -trail (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F whitespace=-trail" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'without -space' '
+
+	rm -f .gitattributes &&
+	git config core.whitespace -space &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return error >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'without -space (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F whitespace=-space" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return error >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'with indent-non-tab only' '
+
+	rm -f .gitattributes &&
+	git config core.whitespace indent,-trailing,-space &&
+	prepare_output &&
+
+	grep Eight error >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'with indent-non-tab only (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F whitespace=indent,-trailing,-space" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight error >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'with indent-non-tab only, tabwidth=10' '
+
+	rm -f .gitattributes &&
+	git config core.whitespace indent,tabwidth=10,-trailing,-space &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'with indent-non-tab only, tabwidth=10 (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F whitespace=indent,-trailing,-space,tabwidth=10" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT normal >/dev/null &&
+	grep With normal >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'with cr-at-eol' '
+
+	rm -f .gitattributes &&
+	git config core.whitespace cr-at-eol &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'with cr-at-eol (attribute)' '
+
+	test_might_fail git config --unset core.whitespace &&
+	echo "F whitespace=trailing,cr-at-eol" >.gitattributes &&
+	prepare_output &&
+
+	grep Eight normal >/dev/null &&
+	grep HT error >/dev/null &&
+	grep With error >/dev/null &&
+	grep Return normal >/dev/null &&
+	grep No normal >/dev/null
+
+'
+
+test_expect_success 'trailing empty lines (1)' '
+
+	rm -f .gitattributes &&
+	test_must_fail git diff --check >output &&
+	grep "new blank line at" output &&
+	grep "trailing whitespace" output
+
+'
+
+test_expect_success 'trailing empty lines (2)' '
+
+	echo "F -whitespace" >.gitattributes &&
+	git diff --check >output &&
+	test_must_be_empty output
+
+'
+
+test_expect_success 'checkdiff shows correct line number for trailing blank lines' '
+
+	printf "a\nb\n" > G &&
+	git add G &&
+	printf "x\nx\nx\na\nb\nc\n\n" > G &&
+	[ "$(git diff --check -- G)" = "G:7: new blank line at EOF." ]
+
+'
+
+test_expect_success 'do not color trailing cr in context' '
+	test_might_fail git config --unset core.whitespace &&
+	rm -f .gitattributes &&
+	echo AAAQ | tr Q "\015" >G &&
+	git add G &&
+	echo BBBQ | tr Q "\015" >>G &&
+	git diff --color G | tr "\015" Q >output &&
+	grep "BBB.*${blue_grep}Q" output &&
+	grep "AAA.*\[mQ" output
+
+'
+
+test_expect_success 'color new trailing blank lines' '
+	{ echo a; echo b; echo; echo; } >x &&
+	git add x &&
+	{ echo a; echo; echo; echo; echo c; echo; echo; echo; echo; } >x &&
+	git diff --color x >output &&
+	cnt=$($grep_a "${blue_grep}" output | wc -l) &&
+	test $cnt = 2
+'
+
+test_done