Merge branch 'js/pack-objects-mutex-init-fix' into maint
[gitweb.git] / refs.c
diff --git a/refs.c b/refs.c
index c590a992fb19ce92dcf0932b58f83b65028f8316..9a318c8456c3fe8d157cf6c7c6aca5b635d75230 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -9,10 +9,13 @@
 #include "iterator.h"
 #include "refs.h"
 #include "refs/refs-internal.h"
+#include "object-store.h"
 #include "object.h"
 #include "tag.h"
 #include "submodule.h"
 #include "worktree.h"
+#include "argv-array.h"
+#include "repository.h"
 
 /*
  * List of all available backends
@@ -186,7 +189,7 @@ int ref_resolves_to_object(const char *refname,
        if (flags & REF_ISBROKEN)
                return 0;
        if (!has_sha1_file(oid->hash)) {
-               error("%s does not point to a valid object!", refname);
+               error(_("%s does not point to a valid object!"), refname);
                return 0;
        }
        return 1;
@@ -194,21 +197,21 @@ int ref_resolves_to_object(const char *refname,
 
 char *refs_resolve_refdup(struct ref_store *refs,
                          const char *refname, int resolve_flags,
-                         unsigned char *sha1, int *flags)
+                         struct object_id *oid, int *flags)
 {
        const char *result;
 
        result = refs_resolve_ref_unsafe(refs, refname, resolve_flags,
-                                        sha1, flags);
+                                        oid, flags);
        return xstrdup_or_null(result);
 }
 
 char *resolve_refdup(const char *refname, int resolve_flags,
-                    unsigned char *sha1, int *flags)
+                    struct object_id *oid, int *flags)
 {
-       return refs_resolve_refdup(get_main_ref_store(),
+       return refs_resolve_refdup(get_main_ref_store(the_repository),
                                   refname, resolve_flags,
-                                  sha1, flags);
+                                  oid, flags);
 }
 
 /* The argument to filter_refs */
@@ -219,22 +222,22 @@ struct ref_filter {
 };
 
 int refs_read_ref_full(struct ref_store *refs, const char *refname,
-                      int resolve_flags, unsigned char *sha1, int *flags)
+                      int resolve_flags, struct object_id *oid, int *flags)
 {
-       if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, sha1, flags))
+       if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags))
                return 0;
        return -1;
 }
 
-int read_ref_full(const char *refname, int resolve_flags, unsigned char *sha1, int *flags)
+int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags)
 {
-       return refs_read_ref_full(get_main_ref_store(), refname,
-                                 resolve_flags, sha1, flags);
+       return refs_read_ref_full(get_main_ref_store(the_repository), refname,
+                                 resolve_flags, oid, flags);
 }
 
-int read_ref(const char *refname, unsigned char *sha1)
+int read_ref(const char *refname, struct object_id *oid)
 {
-       return read_ref_full(refname, RESOLVE_REF_READING, sha1, NULL);
+       return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL);
 }
 
 int ref_exists(const char *refname)
@@ -242,6 +245,50 @@ int ref_exists(const char *refname)
        return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, NULL, NULL);
 }
 
+static int match_ref_pattern(const char *refname,
+                            const struct string_list_item *item)
+{
+       int matched = 0;
+       if (item->util == NULL) {
+               if (!wildmatch(item->string, refname, 0))
+                       matched = 1;
+       } else {
+               const char *rest;
+               if (skip_prefix(refname, item->string, &rest) &&
+                   (!*rest || *rest == '/'))
+                       matched = 1;
+       }
+       return matched;
+}
+
+int ref_filter_match(const char *refname,
+                    const struct string_list *include_patterns,
+                    const struct string_list *exclude_patterns)
+{
+       struct string_list_item *item;
+
+       if (exclude_patterns && exclude_patterns->nr) {
+               for_each_string_list_item(item, exclude_patterns) {
+                       if (match_ref_pattern(refname, item))
+                               return 0;
+               }
+       }
+
+       if (include_patterns && include_patterns->nr) {
+               int found = 0;
+               for_each_string_list_item(item, include_patterns) {
+                       if (match_ref_pattern(refname, item)) {
+                               found = 1;
+                               break;
+                       }
+               }
+
+               if (!found)
+                       return 0;
+       }
+       return 1;
+}
+
 static int filter_refs(const char *refname, const struct object_id *oid,
                           int flags, void *data)
 {
@@ -252,13 +299,13 @@ static int filter_refs(const char *refname, const struct object_id *oid,
        return filter->fn(refname, oid, flags, filter->cb_data);
 }
 
-enum peel_status peel_object(const unsigned char *name, unsigned char *sha1)
+enum peel_status peel_object(const struct object_id *name, struct object_id *oid)
 {
-       struct object *o = lookup_unknown_object(name);
+       struct object *o = lookup_unknown_object(name->hash);
 
        if (o->type == OBJ_NONE) {
-               int type = sha1_object_info(name, NULL);
-               if (type < 0 || !object_as_type(o, type, 0))
+               int type = oid_object_info(the_repository, name, NULL);
+               if (type < 0 || !object_as_type(the_repository, o, type, 0))
                        return PEEL_INVALID;
        }
 
@@ -269,7 +316,7 @@ enum peel_status peel_object(const unsigned char *name, unsigned char *sha1)
        if (!o)
                return PEEL_INVALID;
 
-       hashcpy(sha1, o->oid.hash);
+       oidcpy(oid, &o->oid);
        return PEEL_PEELED;
 }
 
@@ -331,7 +378,7 @@ int refs_for_each_tag_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
 
 int for_each_tag_ref(each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_tag_ref(get_main_ref_store(), fn, cb_data);
+       return refs_for_each_tag_ref(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
@@ -341,7 +388,7 @@ int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_da
 
 int for_each_branch_ref(each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_branch_ref(get_main_ref_store(), fn, cb_data);
+       return refs_for_each_branch_ref(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
@@ -351,7 +398,7 @@ int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_da
 
 int for_each_remote_ref(each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_remote_ref(get_main_ref_store(), fn, cb_data);
+       return refs_for_each_remote_ref(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 int head_ref_namespaced(each_ref_fn fn, void *cb_data)
@@ -362,13 +409,34 @@ int head_ref_namespaced(each_ref_fn fn, void *cb_data)
        int flag;
 
        strbuf_addf(&buf, "%sHEAD", get_git_namespace());
-       if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag))
+       if (!read_ref_full(buf.buf, RESOLVE_REF_READING, &oid, &flag))
                ret = fn(buf.buf, &oid, flag, cb_data);
        strbuf_release(&buf);
 
        return ret;
 }
 
+void normalize_glob_ref(struct string_list_item *item, const char *prefix,
+                       const char *pattern)
+{
+       struct strbuf normalized_pattern = STRBUF_INIT;
+
+       if (*pattern == '/')
+               BUG("pattern must not start with '/'");
+
+       if (prefix) {
+               strbuf_addstr(&normalized_pattern, prefix);
+       }
+       else if (!starts_with(pattern, "refs/"))
+               strbuf_addstr(&normalized_pattern, "refs/");
+       strbuf_addstr(&normalized_pattern, pattern);
+       strbuf_strip_suffix(&normalized_pattern, "/");
+
+       item->string = strbuf_detach(&normalized_pattern, NULL);
+       item->util = has_glob_specials(pattern) ? NULL : item->string;
+       strbuf_release(&normalized_pattern);
+}
+
 int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
        const char *prefix, void *cb_data)
 {
@@ -422,20 +490,41 @@ static const char *ref_rev_parse_rules[] = {
        NULL
 };
 
+#define NUM_REV_PARSE_RULES (ARRAY_SIZE(ref_rev_parse_rules) - 1)
+
+/*
+ * Is it possible that the caller meant full_name with abbrev_name?
+ * If so return a non-zero value to signal "yes"; the magnitude of
+ * the returned value gives the precedence used for disambiguation.
+ *
+ * If abbrev_name cannot mean full_name, return 0.
+ */
 int refname_match(const char *abbrev_name, const char *full_name)
 {
        const char **p;
        const int abbrev_name_len = strlen(abbrev_name);
+       const int num_rules = NUM_REV_PARSE_RULES;
 
-       for (p = ref_rev_parse_rules; *p; p++) {
-               if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) {
-                       return 1;
-               }
-       }
+       for (p = ref_rev_parse_rules; *p; p++)
+               if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name)))
+                       return &ref_rev_parse_rules[num_rules] - p;
 
        return 0;
 }
 
+/*
+ * Given a 'prefix' expand it by the rules in 'ref_rev_parse_rules' and add
+ * the results to 'prefixes'
+ */
+void expand_ref_prefix(struct argv_array *prefixes, const char *prefix)
+{
+       const char **p;
+       int len = strlen(prefix);
+
+       for (p = ref_rev_parse_rules; *p; p++)
+               argv_array_pushf(prefixes, *p, len, prefix);
+}
+
 /*
  * *string and *len will only be substituted, and *string returned (for
  * later free()ing) if the string passed in is a magic short-hand form
@@ -456,15 +545,15 @@ static char *substitute_branch_name(const char **string, int *len)
        return NULL;
 }
 
-int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
+int dwim_ref(const char *str, int len, struct object_id *oid, char **ref)
 {
        char *last_branch = substitute_branch_name(&str, &len);
-       int   refs_found  = expand_ref(str, len, sha1, ref);
+       int   refs_found  = expand_ref(str, len, oid, ref);
        free(last_branch);
        return refs_found;
 }
 
-int expand_ref(const char *str, int len, unsigned char *sha1, char **ref)
+int expand_ref(const char *str, int len, struct object_id *oid, char **ref)
 {
        const char **p, *r;
        int refs_found = 0;
@@ -472,11 +561,11 @@ int expand_ref(const char *str, int len, unsigned char *sha1, char **ref)
 
        *ref = NULL;
        for (p = ref_rev_parse_rules; *p; p++) {
-               unsigned char sha1_from_ref[20];
-               unsigned char *this_result;
+               struct object_id oid_from_ref;
+               struct object_id *this_result;
                int flag;
 
-               this_result = refs_found ? sha1_from_ref : sha1;
+               this_result = refs_found ? &oid_from_ref : oid;
                strbuf_reset(&fullref);
                strbuf_addf(&fullref, *p, len, str);
                r = resolve_ref_unsafe(fullref.buf, RESOLVE_REF_READING,
@@ -487,16 +576,16 @@ int expand_ref(const char *str, int len, unsigned char *sha1, char **ref)
                        if (!warn_ambiguous_refs)
                                break;
                } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) {
-                       warning("ignoring dangling symref %s.", fullref.buf);
+                       warning(_("ignoring dangling symref %s"), fullref.buf);
                } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) {
-                       warning("ignoring broken ref %s.", fullref.buf);
+                       warning(_("ignoring broken ref %s"), fullref.buf);
                }
        }
        strbuf_release(&fullref);
        return refs_found;
 }
 
-int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
+int dwim_log(const char *str, int len, struct object_id *oid, char **log)
 {
        char *last_branch = substitute_branch_name(&str, &len);
        const char **p;
@@ -505,13 +594,13 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
 
        *log = NULL;
        for (p = ref_rev_parse_rules; *p; p++) {
-               unsigned char hash[20];
+               struct object_id hash;
                const char *ref, *it;
 
                strbuf_reset(&path);
                strbuf_addf(&path, *p, len, str);
                ref = resolve_ref_unsafe(path.buf, RESOLVE_REF_READING,
-                                        hash, NULL);
+                                        &hash, NULL);
                if (!ref)
                        continue;
                if (reflog_exists(path.buf))
@@ -522,7 +611,7 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
                        continue;
                if (!logs_found++) {
                        *log = xstrdup(it);
-                       hashcpy(sha1, hash);
+                       oidcpy(oid, &hash);
                }
                if (!warn_ambiguous_refs)
                        break;
@@ -535,7 +624,8 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
 static int is_per_worktree_ref(const char *refname)
 {
        return !strcmp(refname, "HEAD") ||
-               starts_with(refname, "refs/bisect/");
+               starts_with(refname, "refs/bisect/") ||
+               starts_with(refname, "refs/rewritten/");
 }
 
 static int is_pseudoref_syntax(const char *refname)
@@ -574,41 +664,54 @@ long get_files_ref_lock_timeout_ms(void)
        return timeout_ms;
 }
 
-static int write_pseudoref(const char *pseudoref, const unsigned char *sha1,
-                          const unsigned char *old_sha1, struct strbuf *err)
+static int write_pseudoref(const char *pseudoref, const struct object_id *oid,
+                          const struct object_id *old_oid, struct strbuf *err)
 {
        const char *filename;
        int fd;
-       static struct lock_file lock;
+       struct lock_file lock = LOCK_INIT;
        struct strbuf buf = STRBUF_INIT;
        int ret = -1;
 
-       strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1));
+       if (!oid)
+               return 0;
+
+       strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
 
        filename = git_path("%s", pseudoref);
-       fd = hold_lock_file_for_update_timeout(&lock, filename,
-                                              LOCK_DIE_ON_ERROR,
+       fd = hold_lock_file_for_update_timeout(&lock, filename, 0,
                                               get_files_ref_lock_timeout_ms());
        if (fd < 0) {
-               strbuf_addf(err, "could not open '%s' for writing: %s",
+               strbuf_addf(err, _("could not open '%s' for writing: %s"),
                            filename, strerror(errno));
                goto done;
        }
 
-       if (old_sha1) {
-               unsigned char actual_old_sha1[20];
+       if (old_oid) {
+               struct object_id actual_old_oid;
 
-               if (read_ref(pseudoref, actual_old_sha1))
-                       die("could not read ref '%s'", pseudoref);
-               if (hashcmp(actual_old_sha1, old_sha1)) {
-                       strbuf_addf(err, "unexpected sha1 when writing '%s'", pseudoref);
+               if (read_ref(pseudoref, &actual_old_oid)) {
+                       if (!is_null_oid(old_oid)) {
+                               strbuf_addf(err, _("could not read ref '%s'"),
+                                           pseudoref);
+                               rollback_lock_file(&lock);
+                               goto done;
+                       }
+               } else if (is_null_oid(old_oid)) {
+                       strbuf_addf(err, _("ref '%s' already exists"),
+                                   pseudoref);
+                       rollback_lock_file(&lock);
+                       goto done;
+               } else if (oidcmp(&actual_old_oid, old_oid)) {
+                       strbuf_addf(err, _("unexpected object ID when writing '%s'"),
+                                   pseudoref);
                        rollback_lock_file(&lock);
                        goto done;
                }
        }
 
        if (write_in_full(fd, buf.buf, buf.len) < 0) {
-               strbuf_addf(err, "could not write to '%s'", filename);
+               strbuf_addf(err, _("could not write to '%s'"), filename);
                rollback_lock_file(&lock);
                goto done;
        }
@@ -620,26 +723,30 @@ static int write_pseudoref(const char *pseudoref, const unsigned char *sha1,
        return ret;
 }
 
-static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1)
+static int delete_pseudoref(const char *pseudoref, const struct object_id *old_oid)
 {
-       static struct lock_file lock;
        const char *filename;
 
        filename = git_path("%s", pseudoref);
 
-       if (old_sha1 && !is_null_sha1(old_sha1)) {
+       if (old_oid && !is_null_oid(old_oid)) {
+               struct lock_file lock = LOCK_INIT;
                int fd;
-               unsigned char actual_old_sha1[20];
+               struct object_id actual_old_oid;
 
                fd = hold_lock_file_for_update_timeout(
-                               &lock, filename, LOCK_DIE_ON_ERROR,
+                               &lock, filename, 0,
                                get_files_ref_lock_timeout_ms());
-               if (fd < 0)
-                       die_errno(_("Could not open '%s' for writing"), filename);
-               if (read_ref(pseudoref, actual_old_sha1))
-                       die("could not read ref '%s'", pseudoref);
-               if (hashcmp(actual_old_sha1, old_sha1)) {
-                       warning("Unexpected sha1 when deleting %s", pseudoref);
+               if (fd < 0) {
+                       error_errno(_("could not open '%s' for writing"),
+                                   filename);
+                       return -1;
+               }
+               if (read_ref(pseudoref, &actual_old_oid))
+                       die(_("could not read ref '%s'"), pseudoref);
+               if (oidcmp(&actual_old_oid, old_oid)) {
+                       error(_("unexpected object ID when deleting '%s'"),
+                             pseudoref);
                        rollback_lock_file(&lock);
                        return -1;
                }
@@ -655,20 +762,20 @@ static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1
 
 int refs_delete_ref(struct ref_store *refs, const char *msg,
                    const char *refname,
-                   const unsigned char *old_sha1,
+                   const struct object_id *old_oid,
                    unsigned int flags)
 {
        struct ref_transaction *transaction;
        struct strbuf err = STRBUF_INIT;
 
        if (ref_type(refname) == REF_TYPE_PSEUDOREF) {
-               assert(refs == get_main_ref_store());
-               return delete_pseudoref(refname, old_sha1);
+               assert(refs == get_main_ref_store(the_repository));
+               return delete_pseudoref(refname, old_oid);
        }
 
        transaction = ref_store_transaction_begin(refs, &err);
        if (!transaction ||
-           ref_transaction_delete(transaction, refname, old_sha1,
+           ref_transaction_delete(transaction, refname, old_oid,
                                   flags, msg, &err) ||
            ref_transaction_commit(transaction, &err)) {
                error("%s", err.buf);
@@ -682,31 +789,27 @@ int refs_delete_ref(struct ref_store *refs, const char *msg,
 }
 
 int delete_ref(const char *msg, const char *refname,
-              const unsigned char *old_sha1, unsigned int flags)
+              const struct object_id *old_oid, unsigned int flags)
 {
-       return refs_delete_ref(get_main_ref_store(), msg, refname,
-                              old_sha1, flags);
+       return refs_delete_ref(get_main_ref_store(the_repository), msg, refname,
+                              old_oid, flags);
 }
 
-int copy_reflog_msg(char *buf, const char *msg)
+void copy_reflog_msg(struct strbuf *sb, const char *msg)
 {
-       char *cp = buf;
        char c;
        int wasspace = 1;
 
-       *cp++ = '\t';
+       strbuf_addch(sb, '\t');
        while ((c = *msg++)) {
                if (wasspace && isspace(c))
                        continue;
                wasspace = isspace(c);
                if (wasspace)
                        c = ' ';
-               *cp++ = c;
+               strbuf_addch(sb, c);
        }
-       while (buf < cp && isspace(cp[-1]))
-               cp--;
-       *cp++ = '\n';
-       return cp - buf;
+       strbuf_rtrim(sb);
 }
 
 int should_autocreate_reflog(const char *refname)
@@ -734,11 +837,11 @@ struct read_ref_at_cb {
        timestamp_t at_time;
        int cnt;
        int reccnt;
-       unsigned char *sha1;
+       struct object_id *oid;
        int found_it;
 
-       unsigned char osha1[20];
-       unsigned char nsha1[20];
+       struct object_id ooid;
+       struct object_id noid;
        int tz;
        timestamp_t date;
        char **msg;
@@ -767,28 +870,28 @@ static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid,
                if (cb->cutoff_cnt)
                        *cb->cutoff_cnt = cb->reccnt - 1;
                /*
-                * we have not yet updated cb->[n|o]sha1 so they still
+                * we have not yet updated cb->[n|o]oid so they still
                 * hold the values for the previous record.
                 */
-               if (!is_null_sha1(cb->osha1)) {
-                       hashcpy(cb->sha1, noid->hash);
-                       if (hashcmp(cb->osha1, noid->hash))
-                               warning("Log for ref %s has gap after %s.",
+               if (!is_null_oid(&cb->ooid)) {
+                       oidcpy(cb->oid, noid);
+                       if (oidcmp(&cb->ooid, noid))
+                               warning(_("log for ref %s has gap after %s"),
                                        cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822)));
                }
                else if (cb->date == cb->at_time)
-                       hashcpy(cb->sha1, noid->hash);
-               else if (hashcmp(noid->hash, cb->sha1))
-                       warning("Log for ref %s unexpectedly ended on %s.",
+                       oidcpy(cb->oid, noid);
+               else if (oidcmp(noid, cb->oid))
+                       warning(_("log for ref %s unexpectedly ended on %s"),
                                cb->refname, show_date(cb->date, cb->tz,
                                                       DATE_MODE(RFC2822)));
-               hashcpy(cb->osha1, ooid->hash);
-               hashcpy(cb->nsha1, noid->hash);
+               oidcpy(&cb->ooid, ooid);
+               oidcpy(&cb->noid, noid);
                cb->found_it = 1;
                return 1;
        }
-       hashcpy(cb->osha1, ooid->hash);
-       hashcpy(cb->nsha1, noid->hash);
+       oidcpy(&cb->ooid, ooid);
+       oidcpy(&cb->noid, noid);
        if (cb->cnt > 0)
                cb->cnt--;
        return 0;
@@ -808,15 +911,15 @@ static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid
                *cb->cutoff_tz = tz;
        if (cb->cutoff_cnt)
                *cb->cutoff_cnt = cb->reccnt;
-       hashcpy(cb->sha1, ooid->hash);
-       if (is_null_sha1(cb->sha1))
-               hashcpy(cb->sha1, noid->hash);
+       oidcpy(cb->oid, ooid);
+       if (is_null_oid(cb->oid))
+               oidcpy(cb->oid, noid);
        /* We just want the first entry */
        return 1;
 }
 
 int read_ref_at(const char *refname, unsigned int flags, timestamp_t at_time, int cnt,
-               unsigned char *sha1, char **msg,
+               struct object_id *oid, char **msg,
                timestamp_t *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
 {
        struct read_ref_at_cb cb;
@@ -829,7 +932,7 @@ int read_ref_at(const char *refname, unsigned int flags, timestamp_t at_time, in
        cb.cutoff_time = cutoff_time;
        cb.cutoff_tz = cutoff_tz;
        cb.cutoff_cnt = cutoff_cnt;
-       cb.sha1 = sha1;
+       cb.oid = oid;
 
        for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb);
 
@@ -837,7 +940,7 @@ int read_ref_at(const char *refname, unsigned int flags, timestamp_t at_time, in
                if (flags & GET_OID_QUIETLY)
                        exit(128);
                else
-                       die("Log for %s is empty.", refname);
+                       die(_("log for %s is empty"), refname);
        }
        if (cb.found_it)
                return 0;
@@ -860,7 +963,7 @@ struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs,
 
 struct ref_transaction *ref_transaction_begin(struct strbuf *err)
 {
-       return ref_store_transaction_begin(get_main_ref_store(), err);
+       return ref_store_transaction_begin(get_main_ref_store(the_repository), err);
 }
 
 void ref_transaction_free(struct ref_transaction *transaction)
@@ -876,10 +979,10 @@ void ref_transaction_free(struct ref_transaction *transaction)
                /* OK */
                break;
        case REF_TRANSACTION_PREPARED:
-               die("BUG: free called on a prepared reference transaction");
+               BUG("free called on a prepared reference transaction");
                break;
        default:
-               die("BUG: unexpected reference transaction state");
+               BUG("unexpected reference transaction state");
                break;
        }
 
@@ -894,17 +997,14 @@ void ref_transaction_free(struct ref_transaction *transaction)
 struct ref_update *ref_transaction_add_update(
                struct ref_transaction *transaction,
                const char *refname, unsigned int flags,
-               const unsigned char *new_sha1,
-               const unsigned char *old_sha1,
+               const struct object_id *new_oid,
+               const struct object_id *old_oid,
                const char *msg)
 {
        struct ref_update *update;
 
        if (transaction->state != REF_TRANSACTION_OPEN)
-               die("BUG: update called for transaction that is not open");
-
-       if ((flags & REF_ISPRUNING) && !(flags & REF_NODEREF))
-               die("BUG: REF_ISPRUNING set without REF_NODEREF");
+               BUG("update called for transaction that is not open");
 
        FLEX_ALLOC_STR(update, refname, refname);
        ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc);
@@ -913,88 +1013,81 @@ struct ref_update *ref_transaction_add_update(
        update->flags = flags;
 
        if (flags & REF_HAVE_NEW)
-               hashcpy(update->new_oid.hash, new_sha1);
+               oidcpy(&update->new_oid, new_oid);
        if (flags & REF_HAVE_OLD)
-               hashcpy(update->old_oid.hash, old_sha1);
+               oidcpy(&update->old_oid, old_oid);
        update->msg = xstrdup_or_null(msg);
        return update;
 }
 
 int ref_transaction_update(struct ref_transaction *transaction,
                           const char *refname,
-                          const unsigned char *new_sha1,
-                          const unsigned char *old_sha1,
+                          const struct object_id *new_oid,
+                          const struct object_id *old_oid,
                           unsigned int flags, const char *msg,
                           struct strbuf *err)
 {
        assert(err);
 
-       if ((new_sha1 && !is_null_sha1(new_sha1)) ?
+       if ((new_oid && !is_null_oid(new_oid)) ?
            check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
            !refname_is_safe(refname)) {
-               strbuf_addf(err, "refusing to update ref with bad name '%s'",
+               strbuf_addf(err, _("refusing to update ref with bad name '%s'"),
                            refname);
                return -1;
        }
 
-       flags &= REF_TRANSACTION_UPDATE_ALLOWED_FLAGS;
+       if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS)
+               BUG("illegal flags 0x%x passed to ref_transaction_update()", flags);
 
-       flags |= (new_sha1 ? REF_HAVE_NEW : 0) | (old_sha1 ? REF_HAVE_OLD : 0);
+       flags |= (new_oid ? REF_HAVE_NEW : 0) | (old_oid ? REF_HAVE_OLD : 0);
 
        ref_transaction_add_update(transaction, refname, flags,
-                                  new_sha1, old_sha1, msg);
+                                  new_oid, old_oid, msg);
        return 0;
 }
 
 int ref_transaction_create(struct ref_transaction *transaction,
                           const char *refname,
-                          const unsigned char *new_sha1,
+                          const struct object_id *new_oid,
                           unsigned int flags, const char *msg,
                           struct strbuf *err)
 {
-       if (!new_sha1 || is_null_sha1(new_sha1))
-               die("BUG: create called without valid new_sha1");
-       return ref_transaction_update(transaction, refname, new_sha1,
-                                     null_sha1, flags, msg, err);
+       if (!new_oid || is_null_oid(new_oid))
+               BUG("create called without valid new_oid");
+       return ref_transaction_update(transaction, refname, new_oid,
+                                     &null_oid, flags, msg, err);
 }
 
 int ref_transaction_delete(struct ref_transaction *transaction,
                           const char *refname,
-                          const unsigned char *old_sha1,
+                          const struct object_id *old_oid,
                           unsigned int flags, const char *msg,
                           struct strbuf *err)
 {
-       if (old_sha1 && is_null_sha1(old_sha1))
-               die("BUG: delete called with old_sha1 set to zeros");
+       if (old_oid && is_null_oid(old_oid))
+               BUG("delete called with old_oid set to zeros");
        return ref_transaction_update(transaction, refname,
-                                     null_sha1, old_sha1,
+                                     &null_oid, old_oid,
                                      flags, msg, err);
 }
 
 int ref_transaction_verify(struct ref_transaction *transaction,
                           const char *refname,
-                          const unsigned char *old_sha1,
+                          const struct object_id *old_oid,
                           unsigned int flags,
                           struct strbuf *err)
 {
-       if (!old_sha1)
-               die("BUG: verify called with old_sha1 set to NULL");
+       if (!old_oid)
+               BUG("verify called with old_oid set to NULL");
        return ref_transaction_update(transaction, refname,
-                                     NULL, old_sha1,
+                                     NULL, old_oid,
                                      flags, NULL, err);
 }
 
-int update_ref_oid(const char *msg, const char *refname,
-              const struct object_id *new_oid, const struct object_id *old_oid,
-              unsigned int flags, enum action_on_err onerr)
-{
-       return update_ref(msg, refname, new_oid ? new_oid->hash : NULL,
-               old_oid ? old_oid->hash : NULL, flags, onerr);
-}
-
 int refs_update_ref(struct ref_store *refs, const char *msg,
-                   const char *refname, const unsigned char *new_sha1,
-                   const unsigned char *old_sha1, unsigned int flags,
+                   const char *refname, const struct object_id *new_oid,
+                   const struct object_id *old_oid, unsigned int flags,
                    enum action_on_err onerr)
 {
        struct ref_transaction *t = NULL;
@@ -1002,12 +1095,12 @@ int refs_update_ref(struct ref_store *refs, const char *msg,
        int ret = 0;
 
        if (ref_type(refname) == REF_TYPE_PSEUDOREF) {
-               assert(refs == get_main_ref_store());
-               ret = write_pseudoref(refname, new_sha1, old_sha1, &err);
+               assert(refs == get_main_ref_store(the_repository));
+               ret = write_pseudoref(refname, new_oid, old_oid, &err);
        } else {
                t = ref_store_transaction_begin(refs, &err);
                if (!t ||
-                   ref_transaction_update(t, refname, new_sha1, old_sha1,
+                   ref_transaction_update(t, refname, new_oid, old_oid,
                                           flags, msg, &err) ||
                    ref_transaction_commit(t, &err)) {
                        ret = 1;
@@ -1015,7 +1108,7 @@ int refs_update_ref(struct ref_store *refs, const char *msg,
                }
        }
        if (ret) {
-               const char *str = "update_ref failed for ref '%s': %s";
+               const char *str = _("update_ref failed for ref '%s': %s");
 
                switch (onerr) {
                case UPDATE_REFS_MSG_ON_ERR:
@@ -1037,12 +1130,12 @@ int refs_update_ref(struct ref_store *refs, const char *msg,
 }
 
 int update_ref(const char *msg, const char *refname,
-              const unsigned char *new_sha1,
-              const unsigned char *old_sha1,
+              const struct object_id *new_oid,
+              const struct object_id *old_oid,
               unsigned int flags, enum action_on_err onerr)
 {
-       return refs_update_ref(get_main_ref_store(), msg, refname, new_sha1,
-                              old_sha1, flags, onerr);
+       return refs_update_ref(get_main_ref_store(the_repository), msg, refname, new_oid,
+                              old_oid, flags, onerr);
 }
 
 char *shorten_unambiguous_ref(const char *refname, int strict)
@@ -1074,8 +1167,8 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
                for (i = 0; i < nr_rules; i++) {
                        assert(offset < total_len);
                        scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset;
-                       offset += snprintf(scanf_fmts[i], total_len - offset,
-                                          ref_rev_parse_rules[i], 2, "%s") + 1;
+                       offset += xsnprintf(scanf_fmts[i], total_len - offset,
+                                           ref_rev_parse_rules[i], 2, "%s") + 1;
                }
        }
 
@@ -1254,7 +1347,7 @@ int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
        int flag;
 
        if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING,
-                               oid.hash, &flag))
+                               &oid, &flag))
                return fn("HEAD", &oid, flag, cb_data);
 
        return 0;
@@ -1262,7 +1355,7 @@ int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
 
 int head_ref(each_ref_fn fn, void *cb_data)
 {
-       return refs_head_ref(get_main_ref_store(), fn, cb_data);
+       return refs_head_ref(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 struct ref_iterator *refs_ref_iterator_begin(
@@ -1301,17 +1394,50 @@ struct ref_iterator *refs_ref_iterator_begin(
  * non-zero value, stop the iteration and return that value;
  * otherwise, return 0.
  */
+static int do_for_each_repo_ref(struct repository *r, const char *prefix,
+                               each_repo_ref_fn fn, int trim, int flags,
+                               void *cb_data)
+{
+       struct ref_iterator *iter;
+       struct ref_store *refs = get_main_ref_store(r);
+
+       if (!refs)
+               return 0;
+
+       iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
+
+       return do_for_each_repo_ref_iterator(r, iter, fn, cb_data);
+}
+
+struct do_for_each_ref_help {
+       each_ref_fn *fn;
+       void *cb_data;
+};
+
+static int do_for_each_ref_helper(struct repository *r,
+                                 const char *refname,
+                                 const struct object_id *oid,
+                                 int flags,
+                                 void *cb_data)
+{
+       struct do_for_each_ref_help *hp = cb_data;
+
+       return hp->fn(refname, oid, flags, hp->cb_data);
+}
+
 static int do_for_each_ref(struct ref_store *refs, const char *prefix,
                           each_ref_fn fn, int trim, int flags, void *cb_data)
 {
        struct ref_iterator *iter;
+       struct do_for_each_ref_help hp = { fn, cb_data };
 
        if (!refs)
                return 0;
 
        iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
 
-       return do_for_each_ref_iterator(iter, fn, cb_data);
+       return do_for_each_repo_ref_iterator(the_repository, iter,
+                                       do_for_each_ref_helper, &hp);
 }
 
 int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
@@ -1321,7 +1447,7 @@ int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
 
 int for_each_ref(each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_ref(get_main_ref_store(), fn, cb_data);
+       return refs_for_each_ref(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 int refs_for_each_ref_in(struct ref_store *refs, const char *prefix,
@@ -1332,7 +1458,7 @@ int refs_for_each_ref_in(struct ref_store *refs, const char *prefix,
 
 int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_ref_in(get_main_ref_store(), prefix, fn, cb_data);
+       return refs_for_each_ref_in(get_main_ref_store(the_repository), prefix, fn, cb_data);
 }
 
 int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken)
@@ -1341,7 +1467,7 @@ int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsig
 
        if (broken)
                flag = DO_FOR_EACH_INCLUDE_BROKEN;
-       return do_for_each_ref(get_main_ref_store(),
+       return do_for_each_ref(get_main_ref_store(the_repository),
                               prefix, fn, 0, flag, cb_data);
 }
 
@@ -1356,12 +1482,11 @@ int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix,
        return do_for_each_ref(refs, prefix, fn, 0, flag, cb_data);
 }
 
-int for_each_replace_ref(each_ref_fn fn, void *cb_data)
+int for_each_replace_ref(struct repository *r, each_repo_ref_fn fn, void *cb_data)
 {
-       return do_for_each_ref(get_main_ref_store(),
-                              git_replace_ref_base, fn,
-                              strlen(git_replace_ref_base),
-                              DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
+       return do_for_each_repo_ref(r, git_replace_ref_base, fn,
+                                   strlen(git_replace_ref_base),
+                                   DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
 }
 
 int for_each_namespaced_ref(each_ref_fn fn, void *cb_data)
@@ -1369,7 +1494,7 @@ int for_each_namespaced_ref(each_ref_fn fn, void *cb_data)
        struct strbuf buf = STRBUF_INIT;
        int ret;
        strbuf_addf(&buf, "%srefs/", get_git_namespace());
-       ret = do_for_each_ref(get_main_ref_store(),
+       ret = do_for_each_ref(get_main_ref_store(the_repository),
                              buf.buf, fn, 0, 0, cb_data);
        strbuf_release(&buf);
        return ret;
@@ -1383,29 +1508,29 @@ int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
 
 int for_each_rawref(each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_rawref(get_main_ref_store(), fn, cb_data);
+       return refs_for_each_rawref(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 int refs_read_raw_ref(struct ref_store *ref_store,
-                     const char *refname, unsigned char *sha1,
+                     const char *refname, struct object_id *oid,
                      struct strbuf *referent, unsigned int *type)
 {
-       return ref_store->be->read_raw_ref(ref_store, refname, sha1, referent, type);
+       return ref_store->be->read_raw_ref(ref_store, refname, oid, referent, type);
 }
 
 /* This function needs to return a meaningful errno on failure */
 const char *refs_resolve_ref_unsafe(struct ref_store *refs,
                                    const char *refname,
                                    int resolve_flags,
-                                   unsigned char *sha1, int *flags)
+                                   struct object_id *oid, int *flags)
 {
        static struct strbuf sb_refname = STRBUF_INIT;
        struct object_id unused_oid;
        int unused_flags;
        int symref_count;
 
-       if (!sha1)
-               sha1 = unused_oid.hash;
+       if (!oid)
+               oid = &unused_oid;
        if (!flags)
                flags = &unused_flags;
 
@@ -1433,7 +1558,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
                unsigned int read_flags = 0;
 
                if (refs_read_raw_ref(refs, refname,
-                                     sha1, &sb_refname, &read_flags)) {
+                                     oid, &sb_refname, &read_flags)) {
                        *flags |= read_flags;
 
                        /* In reading mode, refs must eventually resolve */
@@ -1450,7 +1575,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
                            errno != ENOTDIR)
                                return NULL;
 
-                       hashclr(sha1);
+                       oidclr(oid);
                        if (*flags & REF_BAD_NAME)
                                *flags |= REF_ISBROKEN;
                        return refname;
@@ -1460,7 +1585,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
 
                if (!(read_flags & REF_ISSYMREF)) {
                        if (*flags & REF_BAD_NAME) {
-                               hashclr(sha1);
+                               oidclr(oid);
                                *flags |= REF_ISBROKEN;
                        }
                        return refname;
@@ -1468,7 +1593,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
 
                refname = sb_refname.buf;
                if (resolve_flags & RESOLVE_REF_NO_RECURSE) {
-                       hashclr(sha1);
+                       oidclr(oid);
                        return refname;
                }
                if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
@@ -1489,20 +1614,20 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
 /* backend functions */
 int refs_init_db(struct strbuf *err)
 {
-       struct ref_store *refs = get_main_ref_store();
+       struct ref_store *refs = get_main_ref_store(the_repository);
 
        return refs->be->init_db(refs, err);
 }
 
 const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
-                              unsigned char *sha1, int *flags)
+                              struct object_id *oid, int *flags)
 {
-       return refs_resolve_ref_unsafe(get_main_ref_store(), refname,
-                                      resolve_flags, sha1, flags);
+       return refs_resolve_ref_unsafe(get_main_ref_store(the_repository), refname,
+                                      resolve_flags, oid, flags);
 }
 
 int resolve_gitlink_ref(const char *submodule, const char *refname,
-                       unsigned char *sha1)
+                       struct object_id *oid)
 {
        struct ref_store *refs;
        int flags;
@@ -1512,8 +1637,8 @@ int resolve_gitlink_ref(const char *submodule, const char *refname,
        if (!refs)
                return -1;
 
-       if (!refs_resolve_ref_unsafe(refs, refname, 0, sha1, &flags) ||
-           is_null_sha1(sha1))
+       if (!refs_resolve_ref_unsafe(refs, refname, 0, oid, &flags) ||
+           is_null_oid(oid))
                return -1;
        return 0;
 }
@@ -1549,9 +1674,6 @@ static struct ref_store_hash_entry *alloc_ref_store_hash_entry(
        return entry;
 }
 
-/* A pointer to the ref_store for the main repository: */
-static struct ref_store *main_ref_store;
-
 /* A hashmap of ref_stores, stored by submodule name: */
 static struct hashmap submodule_ref_stores;
 
@@ -1587,19 +1709,22 @@ static struct ref_store *ref_store_init(const char *gitdir,
        struct ref_store *refs;
 
        if (!be)
-               die("BUG: reference backend %s is unknown", be_name);
+               BUG("reference backend %s is unknown", be_name);
 
        refs = be->init(gitdir, flags);
        return refs;
 }
 
-struct ref_store *get_main_ref_store(void)
+struct ref_store *get_main_ref_store(struct repository *r)
 {
-       if (main_ref_store)
-               return main_ref_store;
+       if (r->refs)
+               return r->refs;
+
+       if (!r->gitdir)
+               BUG("attempting to get main_ref_store outside of repository");
 
-       main_ref_store = ref_store_init(get_git_dir(), REF_STORE_ALL_CAPS);
-       return main_ref_store;
+       r->refs = ref_store_init(r->gitdir, REF_STORE_ALL_CAPS);
+       return r->refs;
 }
 
 /*
@@ -1615,7 +1740,7 @@ static void register_ref_store_map(struct hashmap *map,
                hashmap_init(map, ref_store_hash_cmp, NULL, 0);
 
        if (hashmap_put(map, alloc_ref_store_hash_entry(name, refs)))
-               die("BUG: %s ref_store '%s' initialized twice", type, name);
+               BUG("%s ref_store '%s' initialized twice", type, name);
 }
 
 struct ref_store *get_submodule_ref_store(const char *submodule)
@@ -1668,7 +1793,7 @@ struct ref_store *get_worktree_ref_store(const struct worktree *wt)
        const char *id;
 
        if (wt->is_current)
-               return get_main_ref_store();
+               return get_main_ref_store(the_repository);
 
        id = wt->id ? wt->id : "/";
        refs = lookup_ref_store_map(&worktree_ref_stores, id);
@@ -1701,30 +1826,30 @@ int refs_pack_refs(struct ref_store *refs, unsigned int flags)
 }
 
 int refs_peel_ref(struct ref_store *refs, const char *refname,
-                 unsigned char *sha1)
+                 struct object_id *oid)
 {
        int flag;
-       unsigned char base[20];
+       struct object_id base;
 
        if (current_ref_iter && current_ref_iter->refname == refname) {
                struct object_id peeled;
 
                if (ref_iterator_peel(current_ref_iter, &peeled))
                        return -1;
-               hashcpy(sha1, peeled.hash);
+               oidcpy(oid, &peeled);
                return 0;
        }
 
        if (refs_read_ref_full(refs, refname,
-                              RESOLVE_REF_READING, base, &flag))
+                              RESOLVE_REF_READING, &base, &flag))
                return -1;
 
-       return peel_object(base, sha1);
+       return peel_object(&base, oid);
 }
 
-int peel_ref(const char *refname, unsigned char *sha1)
+int peel_ref(const char *refname, struct object_id *oid)
 {
-       return refs_peel_ref(get_main_ref_store(), refname, sha1);
+       return refs_peel_ref(get_main_ref_store(the_repository), refname, oid);
 }
 
 int refs_create_symref(struct ref_store *refs,
@@ -1740,7 +1865,7 @@ int refs_create_symref(struct ref_store *refs,
 int create_symref(const char *ref_target, const char *refs_heads_master,
                  const char *logmsg)
 {
-       return refs_create_symref(get_main_ref_store(), ref_target,
+       return refs_create_symref(get_main_ref_store(the_repository), ref_target,
                                  refs_heads_master, logmsg);
 }
 
@@ -1757,11 +1882,11 @@ int ref_update_reject_duplicates(struct string_list *refnames,
 
                if (!cmp) {
                        strbuf_addf(err,
-                                   "multiple updates for ref '%s' not allowed.",
+                                   _("multiple updates for ref '%s' not allowed"),
                                    refnames->items[i].string);
                        return 1;
                } else if (cmp > 0) {
-                       die("BUG: ref_update_reject_duplicates() received unsorted list");
+                       BUG("ref_update_reject_duplicates() received unsorted list");
                }
        }
        return 0;
@@ -1777,13 +1902,13 @@ int ref_transaction_prepare(struct ref_transaction *transaction,
                /* Good. */
                break;
        case REF_TRANSACTION_PREPARED:
-               die("BUG: prepare called twice on reference transaction");
+               BUG("prepare called twice on reference transaction");
                break;
        case REF_TRANSACTION_CLOSED:
-               die("BUG: prepare called on a closed reference transaction");
+               BUG("prepare called on a closed reference transaction");
                break;
        default:
-               die("BUG: unexpected reference transaction state");
+               BUG("unexpected reference transaction state");
                break;
        }
 
@@ -1810,10 +1935,10 @@ int ref_transaction_abort(struct ref_transaction *transaction,
                ret = refs->be->transaction_abort(refs, transaction, err);
                break;
        case REF_TRANSACTION_CLOSED:
-               die("BUG: abort called on a closed reference transaction");
+               BUG("abort called on a closed reference transaction");
                break;
        default:
-               die("BUG: unexpected reference transaction state");
+               BUG("unexpected reference transaction state");
                break;
        }
 
@@ -1838,10 +1963,10 @@ int ref_transaction_commit(struct ref_transaction *transaction,
                /* Fall through to finish. */
                break;
        case REF_TRANSACTION_CLOSED:
-               die("BUG: commit called on a closed reference transaction");
+               BUG("commit called on a closed reference transaction");
                break;
        default:
-               die("BUG: unexpected reference transaction state");
+               BUG("unexpected reference transaction state");
                break;
        }
 
@@ -1884,14 +2009,14 @@ int refs_verify_refname_available(struct ref_store *refs,
                if (skip && string_list_has_string(skip, dirname.buf))
                        continue;
 
-               if (!refs_read_raw_ref(refs, dirname.buf, oid.hash, &referent, &type)) {
-                       strbuf_addf(err, "'%s' exists; cannot create '%s'",
+               if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) {
+                       strbuf_addf(err, _("'%s' exists; cannot create '%s'"),
                                    dirname.buf, refname);
                        goto cleanup;
                }
 
                if (extras && string_list_has_string(extras, dirname.buf)) {
-                       strbuf_addf(err, "cannot process '%s' and '%s' at the same time",
+                       strbuf_addf(err, _("cannot process '%s' and '%s' at the same time"),
                                    refname, dirname.buf);
                        goto cleanup;
                }
@@ -1915,18 +2040,18 @@ int refs_verify_refname_available(struct ref_store *refs,
                    string_list_has_string(skip, iter->refname))
                        continue;
 
-               strbuf_addf(err, "'%s' exists; cannot create '%s'",
+               strbuf_addf(err, _("'%s' exists; cannot create '%s'"),
                            iter->refname, refname);
                ref_iterator_abort(iter);
                goto cleanup;
        }
 
        if (ok != ITER_DONE)
-               die("BUG: error while iterating over references");
+               BUG("error while iterating over references");
 
        extra_refname = find_descendant_ref(dirname.buf, extras, skip);
        if (extra_refname)
-               strbuf_addf(err, "cannot process '%s' and '%s' at the same time",
+               strbuf_addf(err, _("cannot process '%s' and '%s' at the same time"),
                            refname, extra_refname);
        else
                ret = 0;
@@ -1940,15 +2065,17 @@ int refs_verify_refname_available(struct ref_store *refs,
 int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data)
 {
        struct ref_iterator *iter;
+       struct do_for_each_ref_help hp = { fn, cb_data };
 
        iter = refs->be->reflog_iterator_begin(refs);
 
-       return do_for_each_ref_iterator(iter, fn, cb_data);
+       return do_for_each_repo_ref_iterator(the_repository, iter,
+                                            do_for_each_ref_helper, &hp);
 }
 
 int for_each_reflog(each_ref_fn fn, void *cb_data)
 {
-       return refs_for_each_reflog(get_main_ref_store(), fn, cb_data);
+       return refs_for_each_reflog(get_main_ref_store(the_repository), fn, cb_data);
 }
 
 int refs_for_each_reflog_ent_reverse(struct ref_store *refs,
@@ -1963,7 +2090,7 @@ int refs_for_each_reflog_ent_reverse(struct ref_store *refs,
 int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn,
                                void *cb_data)
 {
-       return refs_for_each_reflog_ent_reverse(get_main_ref_store(),
+       return refs_for_each_reflog_ent_reverse(get_main_ref_store(the_repository),
                                                refname, fn, cb_data);
 }
 
@@ -1976,7 +2103,7 @@ int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname,
 int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn,
                        void *cb_data)
 {
-       return refs_for_each_reflog_ent(get_main_ref_store(), refname,
+       return refs_for_each_reflog_ent(get_main_ref_store(the_repository), refname,
                                        fn, cb_data);
 }
 
@@ -1987,7 +2114,7 @@ int refs_reflog_exists(struct ref_store *refs, const char *refname)
 
 int reflog_exists(const char *refname)
 {
-       return refs_reflog_exists(get_main_ref_store(), refname);
+       return refs_reflog_exists(get_main_ref_store(the_repository), refname);
 }
 
 int refs_create_reflog(struct ref_store *refs, const char *refname,
@@ -1999,7 +2126,7 @@ int refs_create_reflog(struct ref_store *refs, const char *refname,
 int safe_create_reflog(const char *refname, int force_create,
                       struct strbuf *err)
 {
-       return refs_create_reflog(get_main_ref_store(), refname,
+       return refs_create_reflog(get_main_ref_store(the_repository), refname,
                                  force_create, err);
 }
 
@@ -2010,31 +2137,31 @@ int refs_delete_reflog(struct ref_store *refs, const char *refname)
 
 int delete_reflog(const char *refname)
 {
-       return refs_delete_reflog(get_main_ref_store(), refname);
+       return refs_delete_reflog(get_main_ref_store(the_repository), refname);
 }
 
 int refs_reflog_expire(struct ref_store *refs,
-                      const char *refname, const unsigned char *sha1,
+                      const char *refname, const struct object_id *oid,
                       unsigned int flags,
                       reflog_expiry_prepare_fn prepare_fn,
                       reflog_expiry_should_prune_fn should_prune_fn,
                       reflog_expiry_cleanup_fn cleanup_fn,
                       void *policy_cb_data)
 {
-       return refs->be->reflog_expire(refs, refname, sha1, flags,
+       return refs->be->reflog_expire(refs, refname, oid, flags,
                                       prepare_fn, should_prune_fn,
                                       cleanup_fn, policy_cb_data);
 }
 
-int reflog_expire(const char *refname, const unsigned char *sha1,
+int reflog_expire(const char *refname, const struct object_id *oid,
                  unsigned int flags,
                  reflog_expiry_prepare_fn prepare_fn,
                  reflog_expiry_should_prune_fn should_prune_fn,
                  reflog_expiry_cleanup_fn cleanup_fn,
                  void *policy_cb_data)
 {
-       return refs_reflog_expire(get_main_ref_store(),
-                                 refname, sha1, flags,
+       return refs_reflog_expire(get_main_ref_store(the_repository),
+                                 refname, oid, flags,
                                  prepare_fn, should_prune_fn,
                                  cleanup_fn, policy_cb_data);
 }
@@ -2056,7 +2183,7 @@ int refs_delete_refs(struct ref_store *refs, const char *msg,
 int delete_refs(const char *msg, struct string_list *refnames,
                unsigned int flags)
 {
-       return refs_delete_refs(get_main_ref_store(), msg, refnames, flags);
+       return refs_delete_refs(get_main_ref_store(the_repository), msg, refnames, flags);
 }
 
 int refs_rename_ref(struct ref_store *refs, const char *oldref,
@@ -2067,7 +2194,7 @@ int refs_rename_ref(struct ref_store *refs, const char *oldref,
 
 int rename_ref(const char *oldref, const char *newref, const char *logmsg)
 {
-       return refs_rename_ref(get_main_ref_store(), oldref, newref, logmsg);
+       return refs_rename_ref(get_main_ref_store(the_repository), oldref, newref, logmsg);
 }
 
 int refs_copy_existing_ref(struct ref_store *refs, const char *oldref,
@@ -2078,5 +2205,5 @@ int refs_copy_existing_ref(struct ref_store *refs, const char *oldref,
 
 int copy_existing_ref(const char *oldref, const char *newref, const char *logmsg)
 {
-       return refs_copy_existing_ref(get_main_ref_store(), oldref, newref, logmsg);
+       return refs_copy_existing_ref(get_main_ref_store(the_repository), oldref, newref, logmsg);
 }