#include "builtin.h"
 #include "config.h"
 #include "lockfile.h"
+#include "object-store.h"
+#include "repository.h"
 #include "commit.h"
 #include "refs.h"
 #include "dir.h"
 };
 
 struct collected_reflog {
-       unsigned char sha1[20];
+       struct object_id oid;
        char reflog[FLEX_ARRAY];
 };
 
        int nr;
 };
 
+/* Remember to update object flag allocation in object.h */
 #define INCOMPLETE     (1u<<10)
 #define STUDYING       (1u<<11)
 #define REACHABLE      (1u<<12)
        int complete;
        struct tree *tree;
 
-       tree = lookup_tree(oid);
+       tree = lookup_tree(the_repository, oid);
        if (!tree)
                return 0;
        if (tree->object.flags & SEEN)
        if (!tree->buffer) {
                enum object_type type;
                unsigned long size;
-               void *data = read_sha1_file(oid->hash, &type, &size);
+               void *data = read_object_file(oid, &type, &size);
                if (!data) {
                        tree->object.flags |= INCOMPLETE;
                        return 0;
                struct commit *c;
                struct commit_list *parent;
 
-               c = (struct commit *)study.objects[--study.nr].item;
-               if (!c->object.parsed && !parse_object(&c->object.oid))
+               c = (struct commit *)object_array_pop(&study);
+               if (!c->object.parsed && !parse_object(the_repository, &c->object.oid))
                        c->object.flags |= INCOMPLETE;
 
                if (c->object.flags & INCOMPLETE) {
                for (i = 0; i < found.nr; i++) {
                        struct commit *c =
                                (struct commit *)found.objects[i].item;
-                       if (!tree_is_complete(&c->tree->object.oid)) {
+                       if (!tree_is_complete(get_commit_tree_oid(c))) {
                                is_incomplete = 1;
                                c->object.flags |= INCOMPLETE;
                        }
                        found.objects[i].item->flags |= SEEN;
        }
        /* free object arrays */
-       free(study.objects);
-       free(found.objects);
+       object_array_clear(&study);
+       object_array_clear(&found);
        return !is_incomplete;
 }
 
 
        if (is_null_oid(oid))
                return 1;
-       commit = lookup_commit_reference_gently(oid, 1);
+       commit = lookup_commit_reference_gently(the_repository, oid, 1);
        if (!commit)
                return 0;
 
                if (is_null_oid(oid))
                        return 0;
 
-               commit = lookup_commit_reference_gently(oid, 1);
+               commit = lookup_commit_reference_gently(the_repository, oid,
+                                                       1);
 
                /* Not a commit -- keep it */
                if (!commit)
                                    const char *message, void *cb_data)
 {
        struct expire_reflog_policy_cb *cb = cb_data;
-       struct commit *old, *new;
+       struct commit *old_commit, *new_commit;
 
        if (timestamp < cb->cmd.expire_total)
                return 1;
 
-       old = new = NULL;
+       old_commit = new_commit = NULL;
        if (cb->cmd.stalefix &&
-           (!keep_entry(&old, ooid) || !keep_entry(&new, noid)))
+           (!keep_entry(&old_commit, ooid) || !keep_entry(&new_commit, noid)))
                return 1;
 
        if (timestamp < cb->cmd.expire_unreachable) {
                if (cb->unreachable_expire_kind == UE_ALWAYS)
                        return 1;
-               if (unreachable(cb, old, ooid) || unreachable(cb, new, noid))
+               if (unreachable(cb, old_commit, ooid) || unreachable(cb, new_commit, noid))
                        return 1;
        }
 
        struct commit *tip_commit;
        if (flags & REF_ISSYMREF)
                return 0;
-       tip_commit = lookup_commit_reference_gently(oid, 1);
+       tip_commit = lookup_commit_reference_gently(the_repository, oid, 1);
        if (!tip_commit)
                return 0;
        commit_list_insert(tip_commit, list);
                cb->tip_commit = NULL;
                cb->unreachable_expire_kind = UE_HEAD;
        } else {
-               cb->tip_commit = lookup_commit_reference_gently(oid, 1);
+               cb->tip_commit = lookup_commit_reference_gently(the_repository,
+                                                               oid, 1);
                if (!cb->tip_commit)
                        cb->unreachable_expire_kind = UE_ALWAYS;
                else
        struct collect_reflog_cb *cb = cb_data;
 
        FLEX_ALLOC_STR(e, reflog, ref);
-       hashcpy(e->sha1, oid->hash);
+       oidcpy(&e->oid, oid);
        ALLOC_GROW(cb->e, cb->nr + 1, cb->alloc);
        cb->e[cb->nr++] = e;
        return 0;
        return ent;
 }
 
-static int parse_expire_cfg_value(const char *var, const char *value, timestamp_t *expire)
-{
-       if (!value)
-               return config_error_nonbool(var);
-       if (parse_expiry_date(value, expire))
-               return error(_("'%s' for '%s' is not a valid timestamp"),
-                            value, var);
-       return 0;
-}
-
 /* expiry timer slot */
 #define EXPIRE_TOTAL   01
 #define EXPIRE_UNREACH 02
 
        if (!strcmp(key, "reflogexpire")) {
                slot = EXPIRE_TOTAL;
-               if (parse_expire_cfg_value(var, value, &expire))
+               if (git_config_expiry_date(&expire, var, value))
                        return -1;
        } else if (!strcmp(key, "reflogexpireunreachable")) {
                slot = EXPIRE_UNREACH;
-               if (parse_expire_cfg_value(var, value, &expire))
+               if (git_config_expiry_date(&expire, var, value))
                        return -1;
        } else
                return git_default_config(var, value, cb);
                for (i = 0; i < collected.nr; i++) {
                        struct collected_reflog *e = collected.e[i];
                        set_reflog_expiry_param(&cb.cmd, explicit_expiry, e->reflog);
-                       status |= reflog_expire(e->reflog, e->sha1, flags,
+                       status |= reflog_expire(e->reflog, &e->oid, flags,
                                                reflog_expiry_prepare,
                                                should_expire_reflog_ent,
                                                reflog_expiry_cleanup,
 
        for (; i < argc; i++) {
                char *ref;
-               unsigned char sha1[20];
-               if (!dwim_log(argv[i], strlen(argv[i]), sha1, &ref)) {
+               struct object_id oid;
+               if (!dwim_log(argv[i], strlen(argv[i]), &oid, &ref)) {
                        status |= error("%s points nowhere!", argv[i]);
                        continue;
                }
                set_reflog_expiry_param(&cb.cmd, explicit_expiry, ref);
-               status |= reflog_expire(ref, sha1, flags,
+               status |= reflog_expire(ref, &oid, flags,
                                        reflog_expiry_prepare,
                                        should_expire_reflog_ent,
                                        reflog_expiry_cleanup,
 
        for ( ; i < argc; i++) {
                const char *spec = strstr(argv[i], "@{");
-               unsigned char sha1[20];
+               struct object_id oid;
                char *ep, *ref;
                int recno;
 
                        continue;
                }
 
-               if (!dwim_log(argv[i], spec - argv[i], sha1, &ref)) {
+               if (!dwim_log(argv[i], spec - argv[i], &oid, &ref)) {
                        status |= error("no reflog for '%s'", argv[i]);
                        continue;
                }
                        cb.cmd.expire_total = 0;
                }
 
-               status |= reflog_expire(ref, sha1, flags,
+               status |= reflog_expire(ref, &oid, flags,
                                        reflog_expiry_prepare,
                                        should_expire_reflog_ent,
                                        reflog_expiry_cleanup,