Use a *real* built-in diff generator

diff --git a/diff.h b/diff.h
index c3486ffa8618c1b2478c7c7197399bc47af0cbf0..8fac465a9df9b1d8789d17f008968295baa27ad1 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -13,6 +13,9 @@ struct tree_desc {
        unsigned long size;
 };
 
+extern void update_tree_entry(struct tree_desc *);
+extern const unsigned char *tree_entry_extract(struct tree_desc *, const char **, unsigned int *);
+
 struct diff_options;
 
 typedef void (*change_fn_t)(struct diff_options *options,
@@ -56,6 +59,28 @@ extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
                          const char *base, struct diff_options *opt);
 
+struct combine_diff_path {
+       struct combine_diff_path *next;
+       int len;
+       char *path;
+       unsigned int mode;
+       unsigned char sha1[20];
+       struct combine_diff_parent {
+               char status;
+               unsigned int mode;
+               unsigned char sha1[20];
+       } parent[FLEX_ARRAY];
+};
+#define combine_diff_path_size(n, l) \
+       (sizeof(struct combine_diff_path) + \
+        sizeof(struct combine_diff_parent) * (n) + (l) + 1)
+
+extern int show_combined_diff(struct combine_diff_path *elem, int num_parent,
+                             int dense, const char *header,
+                             struct diff_options *);
+
+extern const char *diff_tree_combined_merge(const unsigned char *sha1, const char *, int, struct diff_options *opt);
+
 extern void diff_addremove(struct diff_options *,
                           int addremove,
                           unsigned mode,
@@ -88,9 +113,6 @@ extern int diff_setup_done(struct diff_options *);
 
 #define DIFF_PICKAXE_ALL       1
 
-#define DIFF_DEFAULT_INDEX_ABBREV      7 /* hex digits */
-#define DIFF_DEFAULT_ABBREV    7 /* hex digits */
-
 extern void diffcore_std(struct diff_options *);
 
 extern void diffcore_std_no_resolve(struct diff_options *);
@@ -103,7 +125,7 @@ extern void diffcore_std_no_resolve(struct diff_options *);
 "  --name-only   show only names of changed files.\n" \
 "  --name-status show names and status of changed files.\n" \
 "  --full-index  show full object name on index lines.\n" \
-"  --abbrev      abbreviate object names in diff-tree header and diff-raw.\n" \
+"  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 "  -R            swap input file pairs.\n" \
 "  -B            detect complete rewrites.\n" \
 "  -M            detect renames.\n" \