Merge pull request libgit2#5076 from libgit2/ethomson/ignore_spaces

Ignore files: don't ignore whitespace

Author: ethomson

src/attr_file.c

@@ -583,8 +583,11 @@ int git_attr_fnmatch__parse(
 
 	pattern = *base;
 
-	while (git__isspace(*pattern)) pattern++;
-	if (!*pattern || *pattern == '#') {
+	while (!allow_space && git__isspace(*pattern))
+		pattern++;
+
+	if (!*pattern || *pattern == '#' || *pattern == '\n' ||
+	    (*pattern == '\r' && *(pattern + 1) == '\n')) {
 		*base = git__next_line(pattern);
 		return GIT_ENOTFOUND;
 	}
@@ -606,8 +609,12 @@ int git_attr_fnmatch__parse(
 
 	slash_count = 0;
 	for (scan = pattern; *scan != '\0'; ++scan) {
-		/* scan until (non-escaped) white space */
-		if (git__isspace(*scan) && *(scan - 1) != '\\') {
+		/*
+		 * Scan until a non-escaped whitespace: find a whitespace, then look
+		 * one char backward to ensure that it's not prefixed by a `\`.
+		 * Only look backward if we're not at the first position (`pattern`).
+		 */
+		if (git__isspace(*scan) && scan > pattern && *(scan - 1) != '\\') {
 			if (!allow_space || (*scan != ' ' && *scan != '\t' && *scan != '\r'))
 				break;
 		}

tests/attr/file.c

@@ -181,16 +181,11 @@ void test_attr_file__assign_variants(void)
 	git_attr_file__free(file);
 }
 
-void test_attr_file__check_attr_examples(void)
+static void assert_examples(git_attr_file *file)
 {
-	git_attr_file *file;
 	git_attr_rule *rule;
 	git_attr_assignment *assign;
 
-	cl_git_pass(git_attr_file__load_standalone(&file, cl_fixture("attr/attr3")));
-	cl_assert_equal_s(cl_fixture("attr/attr3"), file->entry->path);
-	cl_assert(file->rules.length == 3);
-
 	rule = get_rule(0);
 	cl_assert_equal_s("*.java", rule->match.pattern);
 	cl_assert(rule->assigns.length == 3);
@@ -219,6 +214,30 @@ void test_attr_file__check_attr_examples(void)
 	assign = get_assign(rule, 0);
 	cl_assert_equal_s("caveat", assign->name);
 	cl_assert_equal_s("unspecified", assign->value);
+}
+
+void test_attr_file__check_attr_examples(void)
+{
+	git_attr_file *file;
+
+	cl_git_pass(git_attr_file__load_standalone(&file, cl_fixture("attr/attr3")));
+	cl_assert_equal_s(cl_fixture("attr/attr3"), file->entry->path);
+	cl_assert(file->rules.length == 3);
+
+	assert_examples(file);
+
+	git_attr_file__free(file);
+}
+
+void test_attr_file__whitespace(void)
+{
+	git_attr_file *file;
+
+	cl_git_pass(git_attr_file__load_standalone(&file, cl_fixture("attr/attr4")));
+	cl_assert_equal_s(cl_fixture("attr/attr4"), file->entry->path);
+	cl_assert(file->rules.length == 3);
+
+	assert_examples(file);
 
 	git_attr_file__free(file);
 }

tests/iterator/workdir.c

@@ -100,7 +100,7 @@ static void workdir_iterator_test(
 
 void test_iterator_workdir__0(void)
 {
-	workdir_iterator_test("attr", NULL, NULL, 23, 5, NULL, "ign");
+	workdir_iterator_test("attr", NULL, NULL, 24, 5, NULL, "ign");
 }
 
 static const char *status_paths[] = {

tests/resources/attr/attr4

@@ -0,0 +1,7 @@
+# This is a comment
+  # This is also a comment
+*.java diff=java -crlf myAttr
+
+  NoMyAttr.java !myAttr
+
+	README caveat=unspecified

tests/status/ignore.c

@@ -1236,3 +1236,33 @@ void test_status_ignore__skips_bom(void)
 	refute_is_ignored("foo.txt");
 	refute_is_ignored("bar.txt");
 }
+
+void test_status_ignore__leading_spaces_are_significant(void)
+{
+	static const char *test_files[] = {
+		"empty_standard_repo/a.test",
+		"empty_standard_repo/b.test",
+		"empty_standard_repo/c.test",
+		"empty_standard_repo/d.test",
+		NULL
+	};
+
+	make_test_data("empty_standard_repo", test_files);
+	cl_git_mkfile(
+		"empty_standard_repo/.gitignore",
+		" a.test\n"
+		"# this is a comment\n"
+		"b.test\n"
+		"\tc.test\n"
+		" # not a comment\n"
+		"d.test\n");
+
+	refute_is_ignored("a.test");
+	assert_is_ignored(" a.test");
+	refute_is_ignored("# this is a comment");
+	assert_is_ignored("b.test");
+	refute_is_ignored("c.test");
+	assert_is_ignored("\tc.test");
+	assert_is_ignored(" # not a comment");
+	assert_is_ignored("d.test");
+}