Merge branch 'mt/add-rm-in-sparse-checkout'

"git add" and "git rm" learned not to touch those paths that are
outside of sparse checkout.

* mt/add-rm-in-sparse-checkout:
  rm: honor sparse checkout patterns
  add: warn when asked to update SKIP_WORKTREE entries
  refresh_index(): add flag to ignore SKIP_WORKTREE entries
  pathspec: allow to ignore SKIP_WORKTREE entries on index matching
  add: make --chmod and --renormalize honor sparse checkouts
  t3705: add tests for `git add` in sparse checkouts
  add: include magic part of pathspec on --refresh error

pathspec.c

@@ -21,7 +21,8 @@
  */
 void add_pathspec_matches_against_index(const struct pathspec *pathspec,
 					struct index_state *istate,
-					char *seen)
+					char *seen,
+					enum ps_skip_worktree_action sw_action)
 {
 	int num_unmatched = 0, i;
 
@@ -40,6 +41,8 @@ void add_pathspec_matches_against_index(const struct pathspec *pathspec,
 	ensure_full_index(istate);
 	for (i = 0; i < istate->cache_nr; i++) {
 		const struct cache_entry *ce = istate->cache[i];
+		if (sw_action == PS_IGNORE_SKIP_WORKTREE && ce_skip_worktree(ce))
+			continue;
 		ce_path_match(istate, ce, pathspec, seen);
 	}
 }
@@ -53,10 +56,26 @@ void add_pathspec_matches_against_index(const struct pathspec *pathspec,
  * given pathspecs achieves against all items in the index.
  */
 char *find_pathspecs_matching_against_index(const struct pathspec *pathspec,
-					    struct index_state *istate)
+					    struct index_state *istate,
+					    enum ps_skip_worktree_action sw_action)
 {
 	char *seen = xcalloc(pathspec->nr, 1);
-	add_pathspec_matches_against_index(pathspec, istate, seen);
+	add_pathspec_matches_against_index(pathspec, istate, seen, sw_action);
+	return seen;
+}
+
+char *find_pathspecs_matching_skip_worktree(const struct pathspec *pathspec)
+{
+	struct index_state *istate = the_repository->index;
+	char *seen = xcalloc(pathspec->nr, 1);
+	int i;
+
+	for (i = 0; i < istate->cache_nr; i++) {
+		struct cache_entry *ce = istate->cache[i];
+		if (ce_skip_worktree(ce))
+		    ce_path_match(istate, ce, pathspec, seen);
+	}
+
 	return seen;
 }