[PATCH 2/2] dir.c: correct "stuck" logging logic

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Before the last patch, the loop in last_exclude_matching_from_list()
looks like this (greatly simplified of course)

   exc = NULL;
   for (...) {
      if (sticky_paths.nr) {
         if (matched) {
            exc = something;
            break;
         }
         continue;
      }
      ...
   }

With this loop, if sticky_paths.nr is non-zero and exc is not NULL, we
know we have found a sticky path and can log " (stuck)".

With the last patch, the "continue;" line is removed and that won't work
anymore. So explicitly keep track of when to print " (stuck)".

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 dir.c                                | 4 +++-
 t/t1011-read-tree-sparse-checkout.sh | 8 ++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/dir.c b/dir.c
index 77f38a5..2028094 100644
--- a/dir.c
+++ b/dir.c
@@ -1005,6 +1005,7 @@ static struct exclude *last_exclude_matching_from_list(const char *pathname,
 {
 	struct exclude *exc = NULL; /* undecided */
 	int i, maybe_descend = 0;
+	const char *stuck = "";
 
 	if (!el->nr)
 		return NULL;	/* undefined */
@@ -1024,6 +1025,7 @@ static struct exclude *last_exclude_matching_from_list(const char *pathname,
 			if (*dtype == DT_UNKNOWN)
 				*dtype = get_dtype(NULL, pathname, pathlen);
 			if (match_sticky(x, pathname, pathlen, *dtype)) {
+				stuck = " (stuck)";
 				exc = x;
 				break;
 			}
@@ -1093,7 +1095,7 @@ static struct exclude *last_exclude_matching_from_list(const char *pathname,
 	trace_printf_key(&trace_exclude, "exclude: %.*s vs %s at line %d => %s%s\n",
 			 pathlen, pathname, exc->pattern, exc->srcpos,
 			 exc->flags & EXC_FLAG_NEGATIVE ? "no" : "yes",
-			 exc->sticky_paths.nr ? " (stuck)" : "");
+			 stuck);
 	return exc;
 }
 
diff --git a/t/t1011-read-tree-sparse-checkout.sh b/t/t1011-read-tree-sparse-checkout.sh
index ecc5e93..f0b856f 100755
--- a/t/t1011-read-tree-sparse-checkout.sh
+++ b/t/t1011-read-tree-sparse-checkout.sh
@@ -287,10 +287,14 @@ test_expect_success 'sparse checkout and dir.c sticky bits' '
 		!one/hideme
 		EOF
 		git config core.sparsecheckout true &&
-		git checkout &&
+		GIT_TRACE_EXCLUDE=2 git checkout 2>&1 | grep stuck >stuck-list &&
 		test_path_is_missing one/hideme &&
 		test_path_is_file    one/showme &&
-		test_path_is_file    two/showme
+		test_path_is_file    two/showme &&
+		cat >expected <<-\EOF &&
+		exclude: one/showme vs /* at line 1 => yes (stuck)
+		EOF
+		test_cmp expected stuck-list
 	)
 '
 
-- 
2.8.0.rc0.210.gd302cd2

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