t4150: test applying StGit patch

diff --git a/attr.c b/attr.c
index cd5469770a6f7841ae327e6ba7141dd99d9cacc1..1f9eebd2ddb7fe8a561500c41f33a52d1fb4fdd1 100644 (file)
--- a/attr.c
+++ b/attr.c
@@ -32,9 +32,12 @@ struct git_attr {
        struct git_attr *next;
        unsigned h;
        int attr_nr;
+       int maybe_macro;
+       int maybe_real;
        char name[FLEX_ARRAY];
 };
 static int attr_nr;
+static int cannot_trust_maybe_real;
 
 static struct git_attr_check *check_all_attr;
 static struct git_attr *(git_attr_hash[HASHSIZE]);
@@ -95,6 +98,8 @@ 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;
+       a->maybe_real = 0;
        git_attr_hash[pos] = a;
 
        REALLOC_ARRAY(check_all_attr, attr_nr);
@@ -244,9 +249,10 @@ 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;
@@ -266,6 +272,10 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
        /* Second pass to fill the attr_states */
        for (cp = states, i = 0; *cp; i++) {
                cp = parse_attr(src, lineno, cp, &(res->state[i]));
+               if (!is_macro)
+                       res->state[i].attr->maybe_real = 1;
+               if (res->state[i].attr->maybe_macro)
+                       cannot_trust_maybe_real = 1;
        }
 
        return res;
@@ -681,13 +691,14 @@ 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 +706,7 @@ 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;
                }
 
@@ -706,10 +717,13 @@ static int macroexpand_one(int attr_nr, int rem)
 }
 
 /*
- * Collect all attributes for path into the array pointed to by
- * check_all_attr.
+ * Collect attributes for path into the array pointed to by
+ * check_all_attr. If num is non-zero, only attributes in check[] are
+ * collected. Otherwise all attributes are collected.
  */
-static void collect_all_attrs(const char *path)
+static void collect_some_attrs(const char *path, int num,
+                              struct git_attr_check *check)
+
 {
        struct attr_stack *stk;
        int i, pathlen, rem, dirlen;
@@ -732,6 +746,19 @@ static void collect_all_attrs(const char *path)
        prepare_attr_stack(path, dirlen);
        for (i = 0; i < attr_nr; i++)
                check_all_attr[i].value = ATTR__UNKNOWN;
+       if (num && !cannot_trust_maybe_real) {
+               rem = 0;
+               for (i = 0; i < num; i++) {
+                       if (!check[i].attr->maybe_real) {
+                               struct git_attr_check *c;
+                               c = check_all_attr + check[i].attr->attr_nr;
+                               c->value = ATTR__UNSET;
+                               rem++;
+                       }
+               }
+               if (rem == num)
+                       return;
+       }
 
        rem = attr_nr;
        for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
@@ -742,7 +769,7 @@ int git_check_attr(const char *path, int num, struct git_attr_check *check)
 {
        int i;
 
-       collect_all_attrs(path);
+       collect_some_attrs(path, num, check);
 
        for (i = 0; i < num; i++) {
                const char *value = check_all_attr[check[i].attr->attr_nr].value;
@@ -758,7 +785,7 @@ int git_all_attrs(const char *path, int *num, struct git_attr_check **check)
 {
        int i, count, j;
 
-       collect_all_attrs(path);
+       collect_some_attrs(path, 0, NULL);
 
        /* Count the number of attributes that are set. */
        count = 0;