tree-diff: rework diff_tree interface to be sha1 based

diff --git a/cache.h b/cache.h
index c6a41575ca83b5ff747ee16c3a71d09b9543abf7..dc040fb1aa99b7970e85e5b175e60f862ff6a74a 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -354,6 +354,7 @@ static inline enum object_type object_type(unsigned int mode)
 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
+#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
@@ -741,12 +742,20 @@ int adjust_shared_perm(const char *path);
  * Create the directory containing the named path, using care to be
  * somewhat safe against races.  Return one of the scld_error values
  * to indicate success/failure.
+ *
+ * SCLD_VANISHED indicates that one of the ancestor directories of the
+ * path existed at one point during the function call and then
+ * suddenly vanished, probably because another process pruned the
+ * directory while we were working.  To be robust against this kind of
+ * race, callers might want to try invoking the function again when it
+ * returns SCLD_VANISHED.
  */
 enum scld_error {
        SCLD_OK = 0,
        SCLD_FAILED = -1,
        SCLD_PERMS = -2,
-       SCLD_EXISTS = -3
+       SCLD_EXISTS = -3,
+       SCLD_VANISHED = -4
 };
 enum scld_error safe_create_leading_directories(char *path);
 enum scld_error safe_create_leading_directories_const(const char *path);
@@ -773,11 +782,11 @@ int daemon_avoid_alias(const char *path);
 int offset_1st_component(const char *path);
 
 /* object replacement */
-#define READ_SHA1_FILE_REPLACE 1
+#define LOOKUP_REPLACE_OBJECT 1
 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 {
-       return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
+       return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
 }
 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
@@ -786,6 +795,12 @@ static inline const unsigned char *lookup_replace_object(const unsigned char *sh
                return sha1;
        return do_lookup_replace_object(sha1);
 }
+static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)
+{
+       if (!(flag & LOOKUP_REPLACE_OBJECT))
+               return sha1;
+       return lookup_replace_object(sha1);
+}
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int sha1_object_info(const unsigned char *, unsigned long *);
@@ -900,9 +915,12 @@ extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 extern int interpret_branch_name(const char *str, int len, struct strbuf *);
 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 
-extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
-extern const char *ref_rev_parse_rules[];
-#define ref_fetch_rules ref_rev_parse_rules
+/*
+ * Return true iff abbrev_name is a possible abbreviation for
+ * full_name according to the rules defined by ref_rev_parse_rules in
+ * refs.c.
+ */
+extern int refname_match(const char *abbrev_name, const char *full_name);
 
 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 extern int validate_headref(const char *ref);
@@ -1087,6 +1105,7 @@ struct object_info {
        enum object_type *typep;
        unsigned long *sizep;
        unsigned long *disk_sizep;
+       unsigned char *delta_base_sha1;
 
        /* Response */
        enum {
@@ -1111,7 +1130,7 @@ struct object_info {
                } packed;
        } u;
 };
-extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
+extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
 
 /* Dumb servers support */
 extern int update_server_info(int);
@@ -1249,6 +1268,8 @@ __attribute__((format (printf, 2, 3)))
 extern void trace_argv_printf(const char **argv, const char *format, ...);
 extern void trace_repo_setup(const char *prefix);
 extern int trace_want(const char *key);
+__attribute__((format (printf, 2, 3)))
+extern void trace_printf_key(const char *key, const char *fmt, ...);
 extern void trace_strbuf(const char *key, const struct strbuf *buf);
 
 void packet_trace_identity(const char *prog);