Add clean.requireForce option, and add -f option to git-clean to override it

diff --git a/builtin-rerere.c b/builtin-rerere.c
index ac0bf335a8c82fa4a6d1f83515a72c10a5b4d98c..8c2c8bdc18a69e4dff7386548e5f7ea78a133f7b 100644 (file)
--- a/builtin-rerere.c
+++ b/builtin-rerere.c
@@ -78,6 +78,13 @@ static void append_line(struct buffer *buffer, const char *line)
        buffer->nr += len;
 }
 
+static void clear_buffer(struct buffer *buffer)
+{
+       free(buffer->ptr);
+       buffer->ptr = NULL;
+       buffer->nr = buffer->alloc = 0;
+}
+
 static int handle_file(const char *path,
         unsigned char *sha1, const char *output)
 {
@@ -105,15 +112,18 @@ static int handle_file(const char *path,
                SHA1_Init(&ctx);
 
        while (fgets(buf, sizeof(buf), f)) {
-               if (!strncmp("<<<<<<< ", buf, 8))
+               if (!prefixcmp(buf, "<<<<<<< "))
                        hunk = 1;
-               else if (!strncmp("=======", buf, 7))
+               else if (!prefixcmp(buf, "======="))
                        hunk = 2;
-               else if (!strncmp(">>>>>>> ", buf, 8)) {
+               else if (!prefixcmp(buf, ">>>>>>> ")) {
+                       int one_is_longer = (one->nr > two->nr);
+                       int common_len = one_is_longer ? two->nr : one->nr;
+                       int cmp = memcmp(one->ptr, two->ptr, common_len);
+
                        hunk_no++;
                        hunk = 0;
-                       if (memcmp(one->ptr, two->ptr, one->nr < two->nr ?
-                                               one->nr : two->nr) > 0) {
+                       if ((cmp > 0) || ((cmp == 0) && one_is_longer)) {
                                struct buffer *swap = one;
                                one = two;
                                two = swap;
@@ -131,6 +141,8 @@ static int handle_file(const char *path,
                                SHA1_Update(&ctx, two->ptr, two->nr);
                                SHA1_Update(&ctx, "\0", 1);
                        }
+                       clear_buffer(one);
+                       clear_buffer(two);
                } else if (hunk == 1)
                        append_line(one, buf);
                else if (hunk == 2)
@@ -154,11 +166,15 @@ static int find_conflict(struct path_list *conflict)
                return error("Could not read index");
        for (i = 0; i + 2 < active_nr; i++) {
                struct cache_entry *e1 = active_cache[i];
-               struct cache_entry *e2 = active_cache[i + 1];
-               struct cache_entry *e3 = active_cache[i + 2];
-               if (ce_stage(e1) == 1 && ce_stage(e2) == 2 &&
-                               ce_stage(e3) == 3 && ce_same_name(e1, e2) &&
-                               ce_same_name(e1, e3)) {
+               struct cache_entry *e2 = active_cache[i+1];
+               struct cache_entry *e3 = active_cache[i+2];
+               if (ce_stage(e1) == 1 &&
+                   ce_stage(e2) == 2 &&
+                   ce_stage(e3) == 3 &&
+                   ce_same_name(e1, e2) && ce_same_name(e1, e3) &&
+                   S_ISREG(ntohl(e1->ce_mode)) &&
+                   S_ISREG(ntohl(e2->ce_mode)) &&
+                   S_ISREG(ntohl(e3->ce_mode))) {
                        path_list_insert((const char *)e1->name, conflict);
                        i += 2;
                }