pathspec: make --literal-pathspecs disable pathspec magic

--literal-pathspecs and its equivalent environment variable are
probably used for scripting. In that setting, pathspec magic may be
unwanted. Disabling globbing in individual pathspec can be done via
:(literal) magic.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git.txt

@@ -450,8 +450,8 @@ help ...`.
 	linkgit:git-replace[1] for more information.
 
 --literal-pathspecs::
-	Treat pathspecs literally, rather than as glob patterns. This is
-	equivalent to setting the `GIT_LITERAL_PATHSPECS` environment
+	Treat pathspecs literally (i.e. no globbing, no pathspec magic).
+	This is equivalent to setting the `GIT_LITERAL_PATHSPECS` environment
 	variable to `1`.
 
 

pathspec.c

@@ -103,7 +103,7 @@ static unsigned prefix_pathspec(struct pathspec_item *item,
 	if (literal_global)
 		global_magic |= PATHSPEC_LITERAL;
 
-	if (elt[0] != ':') {
+	if (elt[0] != ':' || literal_global) {
 		; /* nothing to do */
 	} else if (elt[1] == '(') {
 		/* longhand */

t/t6130-pathspec-noglob.sh

@@ -77,6 +77,12 @@ test_expect_success 'no-glob option matches literally (bracket)' '
 	test_cmp expect actual
 '
 
+test_expect_success 'no-glob option disables :(literal)' '
+	: >expect &&
+	git --literal-pathspecs log --format=%s -- ":(literal)foo" >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'no-glob environment variable works' '
 	echo star >expect &&
 	GIT_LITERAL_PATHSPECS=1 git log --format=%s -- "f*" >actual &&