Add new "git replace" command

diff --git a/attr.c b/attr.c
index 17f6a4dca521d9690377f2e93a0192d8a874d2ad..98eb636f13d314c20e18e646c074e2511b3c891c 100644 (file)
--- a/attr.c
+++ b/attr.c
@@ -1,3 +1,4 @@
+#define NO_THE_INDEX_COMPATIBILITY_MACROS
 #include "cache.h"
 #include "attr.h"
 
@@ -223,7 +224,7 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
                if (is_macro)
                        res->u.attr = git_attr(name, namelen);
                else {
-                       res->u.pattern = (char*)&(res->state[num_attr]);
+                       res->u.pattern = (char *)&(res->state[num_attr]);
                        memcpy(res->u.pattern, name, namelen);
                        res->u.pattern[namelen] = 0;
                }
@@ -274,7 +275,7 @@ static void free_attr_elem(struct attr_stack *e)
                            setto == ATTR__UNKNOWN)
                                ;
                        else
-                               free((char*) setto);
+                               free((char *) setto);
                }
                free(a);
        }
@@ -318,6 +319,9 @@ static struct attr_stack *read_attr_from_array(const char **list)
        return res;
 }
 
+static enum git_attr_direction direction;
+static struct index_state *use_index;
+
 static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
 {
        FILE *fp = fopen(path, "r");
@@ -340,9 +344,10 @@ static void *read_index_data(const char *path)
        unsigned long sz;
        enum object_type type;
        void *data;
+       struct index_state *istate = use_index ? use_index : &the_index;
 
        len = strlen(path);
-       pos = cache_name_pos(path, len);
+       pos = index_name_pos(istate, path, len);
        if (pos < 0) {
                /*
                 * We might be in the middle of a merge, in which
@@ -350,15 +355,15 @@ static void *read_index_data(const char *path)
                 */
                int i;
                for (i = -pos - 1;
-                    (pos < 0 && i < active_nr &&
-                     !strcmp(active_cache[i]->name, path));
+                    (pos < 0 && i < istate->cache_nr &&
+                     !strcmp(istate->cache[i]->name, path));
                     i++)
-                       if (ce_stage(active_cache[i]) == 2)
+                       if (ce_stage(istate->cache[i]) == 2)
                                pos = i;
        }
        if (pos < 0)
                return NULL;
-       data = read_sha1_file(active_cache[pos]->sha1, &type, &sz);
+       data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
        if (!data || type != OBJ_BLOB) {
                free(data);
                return NULL;
@@ -366,27 +371,17 @@ static void *read_index_data(const char *path)
        return data;
 }
 
-static struct attr_stack *read_attr(const char *path, int macro_ok)
+static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
 {
        struct attr_stack *res;
        char *buf, *sp;
        int lineno = 0;
 
-       res = read_attr_from_file(path, macro_ok);
-       if (res)
-               return res;
-
-       res = xcalloc(1, sizeof(*res));
-
-       /*
-        * There is no checked out .gitattributes file there, but
-        * we might have it in the index.  We allow operation in a
-        * sparsely checked out work tree, so read from it.
-        */
        buf = read_index_data(path);
        if (!buf)
-               return res;
+               return NULL;
 
+       res = xcalloc(1, sizeof(*res));
        for (sp = buf; *sp; ) {
                char *ep;
                int more;
@@ -401,6 +396,32 @@ static struct attr_stack *read_attr(const char *path, int macro_ok)
        return res;
 }
 
+static struct attr_stack *read_attr(const char *path, int macro_ok)
+{
+       struct attr_stack *res;
+
+       if (direction == GIT_ATTR_CHECKOUT) {
+               res = read_attr_from_index(path, macro_ok);
+               if (!res)
+                       res = read_attr_from_file(path, macro_ok);
+       }
+       else if (direction == GIT_ATTR_CHECKIN) {
+               res = read_attr_from_file(path, macro_ok);
+               if (!res)
+                       /*
+                        * There is no checked out .gitattributes file there, but
+                        * we might have it in the index.  We allow operation in a
+                        * sparsely checked out work tree, so read from it.
+                        */
+                       res = read_attr_from_index(path, macro_ok);
+       }
+       else
+               res = read_attr_from_index(path, macro_ok);
+       if (!res)
+               res = xcalloc(1, sizeof(*res));
+       return res;
+}
+
 #if DEBUG_ATTR
 static void debug_info(const char *what, struct attr_stack *elem)
 {
@@ -428,6 +449,15 @@ static void debug_set(const char *what, const char *match, struct git_attr *attr
 #define debug_set(a,b,c,d) do { ; } while (0)
 #endif
 
+static void drop_attr_stack(void)
+{
+       while (attr_stack) {
+               struct attr_stack *elem = attr_stack;
+               attr_stack = elem->prev;
+               free_attr_elem(elem);
+       }
+}
+
 static void bootstrap_attr_stack(void)
 {
        if (!attr_stack) {
@@ -438,7 +468,7 @@ static void bootstrap_attr_stack(void)
                elem->prev = attr_stack;
                attr_stack = elem;
 
-               if (!is_bare_repository()) {
+               if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
                        elem = read_attr(GITATTRIBUTES_FILE, 1);
                        elem->origin = strdup("");
                        elem->prev = attr_stack;
@@ -505,7 +535,7 @@ static void prepare_attr_stack(const char *path, int dirlen)
        /*
         * Read from parent directories and push them down
         */
-       if (!is_bare_repository()) {
+       if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
                while (1) {
                        char *cp;
 
@@ -642,3 +672,16 @@ int git_checkattr(const char *path, int num, struct git_attr_check *check)
 
        return 0;
 }
+
+void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
+{
+       enum git_attr_direction old = direction;
+
+       if (is_bare_repository() && new != GIT_ATTR_INDEX)
+               die("BUG: non-INDEX attr direction in a bare repo");
+
+       direction = new;
+       if (new != old)
+               drop_attr_stack();
+       use_index = istate;
+}