Enable ref log creation in git checkout -b.

diff --git a/read-tree.c b/read-tree.c
index 4422dbf424a5f4fd491811648acd3273aba529f3..e16e91b173163f2b514e965d5e5ba7b939ffa1de 100644 (file)
--- a/read-tree.c
+++ b/read-tree.c
@@ -12,6 +12,7 @@
 #include <sys/time.h>
 #include <signal.h>
 
+static int reset = 0;
 static int merge = 0;
 static int update = 0;
 static int index_only = 0;
@@ -133,11 +134,9 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
                pathlen = strlen(first);
                ce_size = cache_entry_size(baselen + pathlen);
 
-               src = xmalloc(sizeof(struct cache_entry *) * src_size);
-               memset(src, 0, sizeof(struct cache_entry *) * src_size);
+               src = xcalloc(src_size, sizeof(struct cache_entry *));
 
-               subposns = xmalloc(sizeof(struct tree_list_entry *) * len);
-               memset(subposns, 0, sizeof(struct tree_list_entry *) * len);
+               subposns = xcalloc(len, sizeof(struct tree_list_entry *));
 
                if (cache_name && !strcmp(cache_name, first)) {
                        any_files = 1;
@@ -177,8 +176,7 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
                        else
                                ce_stage = 2;
 
-                       ce = xmalloc(ce_size);
-                       memset(ce, 0, ce_size);
+                       ce = xcalloc(1, ce_size);
                        ce->ce_mode = create_ce_mode(posns[i]->mode);
                        ce->ce_flags = create_ce_flags(baselen + pathlen,
                                                       ce_stage);
@@ -419,6 +417,10 @@ static void verify_uptodate(struct cache_entry *ce)
                        return;
                errno = 0;
        }
+       if (reset) {
+               ce->ce_flags |= htons(CE_UPDATE);
+               return;
+       }
        if (errno == ENOENT)
                return;
        die("Entry '%s' not uptodate. Cannot merge.", ce->name);
@@ -687,8 +689,14 @@ static int oneway_merge(struct cache_entry **src)
                             merge_size);
 
        if (!a)
-               return 0;
+               return deleted_entry(old, NULL);
        if (old && same(old, a)) {
+               if (reset) {
+                       struct stat st;
+                       if (lstat(old->name, &st) ||
+                           ce_match_stat(old, &st, 1))
+                               old->ce_flags |= htons(CE_UPDATE);
+               }
                return keep_entry(old);
        }
        return merged_entry(a, NULL);
@@ -722,7 +730,7 @@ static struct cache_file cache_file;
 
 int main(int argc, char **argv)
 {
-       int i, newfd, reset, stage = 0;
+       int i, newfd, stage = 0;
        unsigned char sha1[20];
        merge_fn_t fn = NULL;
 
@@ -797,8 +805,8 @@ int main(int argc, char **argv)
                if (1 < index_only + update)
                        usage(read_tree_usage);
 
-               if (get_sha1(arg, sha1) < 0)
-                       usage(read_tree_usage);
+               if (get_sha1(arg, sha1))
+                       die("Not a valid object name %s", arg);
                if (list_tree(sha1) < 0)
                        die("failed to unpack tree object %s", arg);
                stage++;