git.el: Add support for interactive diffs.

diff --git a/merge-recursive.c b/merge-recursive.c
index 8f72b2c079a68ac5cb9d1c90bb7b72fa779efb5f..f7d1b84999d401887e4a4eba091d53f5fe7294c8 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -127,7 +127,7 @@ static void output(int v, const char *fmt, ...)
        va_end(args);
 }
 
-static void flush_output()
+static void flush_output(void)
 {
        struct output_buffer *b, *n;
        for (b = output_list; b; b = n) {
@@ -216,13 +216,19 @@ static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
  */
 static int index_only = 0;
 
+static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
+{
+       parse_tree(tree);
+       init_tree_desc(desc, tree->buffer, tree->size);
+}
+
 static int git_merge_trees(int index_only,
                           struct tree *common,
                           struct tree *head,
                           struct tree *merge)
 {
        int rc;
-       struct object_list *trees = NULL;
+       struct tree_desc t[3];
        struct unpack_trees_options opts;
 
        memset(&opts, 0, sizeof(opts));
@@ -234,11 +240,11 @@ static int git_merge_trees(int index_only,
        opts.head_idx = 2;
        opts.fn = threeway_merge;
 
-       object_list_append(&common->object, &trees);
-       object_list_append(&head->object, &trees);
-       object_list_append(&merge->object, &trees);
+       init_tree_desc_from_tree(t+0, common);
+       init_tree_desc_from_tree(t+1, head);
+       init_tree_desc_from_tree(t+2, merge);
 
-       rc = unpack_trees(trees, &opts);
+       rc = unpack_trees(3, t, &opts);
        cache_tree_free(&active_cache_tree);
        return rc;
 }
@@ -680,6 +686,12 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
 {
        xpparam_t xpp;
 
+       if (buffer_is_binary(orig->ptr, orig->size) ||
+                       buffer_is_binary(src1->ptr, src1->size) ||
+                       buffer_is_binary(src2->ptr, src2->size))
+               return error("Cannot merge binary files: %s vs. %s\n",
+                       name1, name2);
+
        memset(&xpp, 0, sizeof(xpp));
        return xdl_merge(orig,
                         src1, name1,