attr: do not attempt to expand when we know it's not a macro

diff --git a/attr.c b/attr.c
index cd5469770a6f7841ae327e6ba7141dd99d9cacc1..b80e52b157de61f1d4a22d730e2a9c1cb88caaba 100644 (file)
--- a/attr.c
+++ b/attr.c
@@ -32,6 +32,7 @@ struct git_attr {
        struct git_attr *next;
        unsigned h;
        int attr_nr;
+       int maybe_macro;
        char name[FLEX_ARRAY];
 };
 static int attr_nr;
@@ -95,6 +96,7 @@ static struct git_attr *git_attr_internal(const char *name, int len)
        a->h = hval;
        a->next = git_attr_hash[pos];
        a->attr_nr = attr_nr++;
+       a->maybe_macro = 0;
        git_attr_hash[pos] = a;
 
        REALLOC_ARRAY(check_all_attr, attr_nr);
@@ -244,9 +246,10 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
                      sizeof(*res) +
                      sizeof(struct attr_state) * num_attr +
                      (is_macro ? 0 : namelen + 1));
-       if (is_macro)
+       if (is_macro) {
                res->u.attr = git_attr_internal(name, namelen);
-       else {
+               res->u.attr->maybe_macro = 1;
+       } else {
                char *p = (char *)&(res->state[num_attr]);
                memcpy(p, name, namelen);
                res->u.pat.pattern = p;
@@ -681,13 +684,14 @@ static int fill(const char *path, int pathlen, int basename_offset,
        return rem;
 }
 
-static int macroexpand_one(int attr_nr, int rem)
+static int macroexpand_one(int nr, int rem)
 {
        struct attr_stack *stk;
        struct match_attr *a = NULL;
        int i;
 
-       if (check_all_attr[attr_nr].value != ATTR__TRUE)
+       if (check_all_attr[nr].value != ATTR__TRUE ||
+           !check_all_attr[nr].attr->maybe_macro)
                return rem;
 
        for (stk = attr_stack; !a && stk; stk = stk->prev)
@@ -695,7 +699,7 @@ static int macroexpand_one(int attr_nr, int rem)
                        struct match_attr *ma = stk->attrs[i];
                        if (!ma->is_macro)
                                continue;
-                       if (ma->u.attr->attr_nr == attr_nr)
+                       if (ma->u.attr->attr_nr == nr)
                                a = ma;
                }