format-patch: fix two-argument special case, and make it easier to pick single commits

diff --git a/diff.h b/diff.h
index 2f4a7b463b699e65848656279287e2d8e2048c16..9b2e1e62bbe6f621d2d39ec7707eccd75ff76aac 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -8,11 +8,32 @@
        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
        S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
 
+struct tree_desc {
+       void *buf;
+       unsigned long size;
+};
+
+struct diff_options;
+
+typedef void (*change_fn_t)(struct diff_options *options,
+                unsigned old_mode, unsigned new_mode,
+                const unsigned char *old_sha1,
+                const unsigned char *new_sha1,
+                const char *base, const char *path);
+
+typedef void (*add_remove_fn_t)(struct diff_options *options,
+                   int addremove, unsigned mode,
+                   const unsigned char *sha1,
+                   const char *base, const char *path);
+
 struct diff_options {
        const char **paths;
        const char *filter;
        const char *orderfile;
        const char *pickaxe;
+       unsigned recursive:1,
+                tree_in_recursive:1,
+                full_index:1;
        int break_opt;
        int detect_rename;
        int find_copies_harder;
@@ -23,8 +44,17 @@ struct diff_options {
        int reverse_diff;
        int rename_limit;
        int setup;
+
+       change_fn_t change;
+       add_remove_fn_t add_remove;
 };
 
+extern void diff_tree_setup_paths(const char **paths);
+extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
+                    const char *base, struct diff_options *opt);
+extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
+                         const char *base, struct diff_options *opt);
+
 extern void diff_addremove(struct diff_options *,
                           int addremove,
                           unsigned mode,
@@ -62,12 +92,12 @@ extern void diffcore_std_no_resolve(struct diff_options *);
 
 #define COMMON_DIFF_OPTIONS_HELP \
 "\ncommon diff options:\n" \
-"  -r            diff recursively (only meaningful in diff-tree)\n" \
 "  -z            output diff-raw with lines terminated with NUL.\n" \
 "  -p            output patch format.\n" \
 "  -u            synonym for -p.\n" \
 "  --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 ines.\n" \
 "  -R            swap input file pairs.\n" \
 "  -B            detect complete rewrites.\n" \
 "  -M            detect renames.\n" \