grep: do not do external grep on skip-worktree entries

Skip-worktree entries are not on disk. We cannot use external grep in such
cases.

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

diff --git a/builtin-grep.c b/builtin-grep.c
index 813fe9778ae443edafac338d67299368631e821d..25ee75d989d80382e370b5460f3d8f64ae086f6e 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -357,6 +357,21 @@ static void grep_add_color(struct strbuf *sb, const char *escape_seq)
                strbuf_setlen(sb, sb->len - 1);
 }
 
+static int has_skip_worktree_entry(struct grep_opt *opt, const char **paths)
+{
+       int nr;
+       for (nr = 0; nr < active_nr; nr++) {
+               struct cache_entry *ce = active_cache[nr];
+               if (!S_ISREG(ce->ce_mode))
+                       continue;
+               if (!pathspec_matches(paths, ce->name, opt->max_depth))
+                       continue;
+               if (ce_skip_worktree(ce))
+                       return 1;
+       }
+       return 0;
+}
+
 static int external_grep(struct grep_opt *opt, const char **paths, int cached)
 {
        int i, nr, argc, hit, len, status;
@@ -365,7 +380,8 @@ static int external_grep(struct grep_opt *opt, const char **paths, int cached)
        char *argptr = randarg;
        struct grep_pat *p;
 
-       if (opt->extended || (opt->relative && opt->prefix_length))
+       if (opt->extended || (opt->relative && opt->prefix_length)
+           || has_skip_worktree_entry(opt, paths))
                return -1;
        len = nr = 0;
        push_arg("grep");