define a structure for object IDs

diff --git a/read-cache.c b/read-cache.c
index f0426938565e89d870aa07b65557e7d5b890b382..8d71860f692ffa5deafe7f23774b1b9ab2f31378 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -5,6 +5,7 @@
  */
 #define NO_THE_INDEX_COMPATIBILITY_MACROS
 #include "cache.h"
+#include "lockfile.h"
 #include "cache-tree.h"
 #include "refs.h"
 #include "dir.h"
@@ -724,7 +725,7 @@ struct cache_entry *make_cache_entry(unsigned int mode,
                unsigned int refresh_options)
 {
        int size, len;
-       struct cache_entry *ce;
+       struct cache_entry *ce, *ret;
 
        if (!verify_path(path)) {
                error("Invalid path '%s'", path);
@@ -741,7 +742,13 @@ struct cache_entry *make_cache_entry(unsigned int mode,
        ce->ce_namelen = len;
        ce->ce_mode = create_ce_mode(mode);
 
-       return refresh_cache_entry(ce, refresh_options);
+       ret = refresh_cache_entry(ce, refresh_options);
+       if (!ret) {
+               free(ce);
+               return NULL;
+       } else {
+               return ret;
+       }
 }
 
 int ce_same_name(const struct cache_entry *a, const struct cache_entry *b)
@@ -1252,24 +1259,16 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
 
 #define INDEX_FORMAT_DEFAULT 3
 
-static int index_format_config(const char *var, const char *value, void *cb)
-{
-       unsigned int *version = cb;
-       if (!strcmp(var, "index.version")) {
-               *version = git_config_int(var, value);
-               return 0;
-       }
-       return 1;
-}
-
 static unsigned int get_index_format_default(void)
 {
        char *envversion = getenv("GIT_INDEX_VERSION");
        char *endp;
+       int value;
        unsigned int version = INDEX_FORMAT_DEFAULT;
 
        if (!envversion) {
-               git_config(index_format_config, &version);
+               if (!git_config_get_int("index.version", &value))
+                       version = value;
                if (version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) {
                        warning(_("index.version set, but the value is invalid.\n"
                                  "Using version %i"), INDEX_FORMAT_DEFAULT);
@@ -1381,6 +1380,14 @@ static int read_index_extension(struct index_state *istate,
        return 0;
 }
 
+int hold_locked_index(struct lock_file *lk, int die_on_error)
+{
+       return hold_lock_file_for_update(lk, get_index_file(),
+                                        die_on_error
+                                        ? LOCK_DIE_ON_ERROR
+                                        : 0);
+}
+
 int read_index(struct index_state *istate)
 {
        return read_index_from(istate, get_index_file());
@@ -1479,6 +1486,21 @@ static struct cache_entry *create_from_disk(struct ondisk_cache_entry *ondisk,
        return ce;
 }
 
+static void check_ce_order(struct cache_entry *ce, struct cache_entry *next_ce)
+{
+       int name_compare = strcmp(ce->name, next_ce->name);
+       if (0 < name_compare)
+               die("unordered stage entries in index");
+       if (!name_compare) {
+               if (!ce_stage(ce))
+                       die("multiple stage entries for merged file '%s'",
+                               ce->name);
+               if (ce_stage(ce) > ce_stage(next_ce))
+                       die("unordered stage entries for '%s'",
+                               ce->name);
+       }
+}
+
 /* remember to discard_cache() before reading a different cache! */
 int do_read_index(struct index_state *istate, const char *path, int must_exist)
 {
@@ -1540,6 +1562,9 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist)
                ce = create_from_disk(disk_ce, &consumed, previous_name);
                set_index_entry(istate, i, ce);
 
+               if (i > 0)
+                       check_ce_order(istate->cache[i - 1], ce);
+
                src_offset += consumed;
        }
        strbuf_release(&previous_name_buf);
@@ -2037,16 +2062,10 @@ void set_alternate_index_output(const char *name)
 
 static int commit_locked_index(struct lock_file *lk)
 {
-       if (alternate_index_output) {
-               if (lk->fd >= 0 && close_lock_file(lk))
-                       return -1;
-               if (rename(lk->filename, alternate_index_output))
-                       return -1;
-               lk->filename[0] = 0;
-               return 0;
-       } else {
+       if (alternate_index_output)
+               return commit_lock_file_to(lk, alternate_index_output);
+       else
                return commit_lock_file(lk);
-       }
 }
 
 static int do_write_locked_index(struct index_state *istate, struct lock_file *lock,
@@ -2186,7 +2205,6 @@ int read_index_unmerged(struct index_state *istate)
                if (add_index_entry(istate, new_ce, 0))
                        return error("%s: cannot drop to stage #0",
                                     new_ce->name);
-               i = index_name_pos(istate, new_ce->name, len);
        }
        return unmerged;
 }