ref_newer: convert to use struct object_id
[gitweb.git] / refs.c
diff --git a/refs.c b/refs.c
index 4e15f60d98ea8affdef226bce199935fa694b195..bab92d773d1e06a29805564e48b96d500a6f9b9b 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -304,6 +304,11 @@ struct ref_entry {
 };
 
 static void read_loose_refs(const char *dirname, struct ref_dir *dir);
+static int search_ref_dir(struct ref_dir *dir, const char *refname, size_t len);
+static struct ref_entry *create_dir_entry(struct ref_cache *ref_cache,
+                                         const char *dirname, size_t len,
+                                         int incomplete);
+static void add_entry_to_dir(struct ref_dir *dir, struct ref_entry *entry);
 
 static struct ref_dir *get_ref_dir(struct ref_entry *entry)
 {
@@ -312,6 +317,24 @@ static struct ref_dir *get_ref_dir(struct ref_entry *entry)
        dir = &entry->u.subdir;
        if (entry->flag & REF_INCOMPLETE) {
                read_loose_refs(entry->name, dir);
+
+               /*
+                * Manually add refs/bisect, which, being
+                * per-worktree, might not appear in the directory
+                * listing for refs/ in the main repo.
+                */
+               if (!strcmp(entry->name, "refs/")) {
+                       int pos = search_ref_dir(dir, "refs/bisect/", 12);
+                       if (pos < 0) {
+                               struct ref_entry *child_entry;
+                               child_entry = create_dir_entry(dir->ref_cache,
+                                                              "refs/bisect/",
+                                                              12, 1);
+                               add_entry_to_dir(dir, child_entry);
+                               read_loose_refs("refs/bisect",
+                                               &child_entry->u.subdir);
+                       }
+               }
                entry->flag &= ~REF_INCOMPLETE;
        }
        return dir;
@@ -1579,16 +1602,15 @@ static int resolve_missing_loose_ref(const char *refname,
 }
 
 /* This function needs to return a meaningful errno on failure */
-static const char *resolve_ref_unsafe_1(const char *refname,
-                                       int resolve_flags,
-                                       unsigned char *sha1,
-                                       int *flags,
-                                       struct strbuf *sb_path)
+static const char *resolve_ref_1(const char *refname,
+                                int resolve_flags,
+                                unsigned char *sha1,
+                                int *flags,
+                                struct strbuf *sb_refname,
+                                struct strbuf *sb_path,
+                                struct strbuf *sb_contents)
 {
        int depth = MAXDEPTH;
-       ssize_t len;
-       char buffer[256];
-       static char refname_buffer[256];
        int bad_name = 0;
 
        if (flags)
@@ -1654,19 +1676,18 @@ static const char *resolve_ref_unsafe_1(const char *refname,
 
                /* Follow "normalized" - ie "refs/.." symlinks by hand */
                if (S_ISLNK(st.st_mode)) {
-                       len = readlink(path, buffer, sizeof(buffer)-1);
-                       if (len < 0) {
+                       strbuf_reset(sb_contents);
+                       if (strbuf_readlink(sb_contents, path, 0) < 0) {
                                if (errno == ENOENT || errno == EINVAL)
                                        /* inconsistent with lstat; retry */
                                        goto stat_ref;
                                else
                                        return NULL;
                        }
-                       buffer[len] = 0;
-                       if (starts_with(buffer, "refs/") &&
-                                       !check_refname_format(buffer, 0)) {
-                               strcpy(refname_buffer, buffer);
-                               refname = refname_buffer;
+                       if (starts_with(sb_contents->buf, "refs/") &&
+                           !check_refname_format(sb_contents->buf, 0)) {
+                               strbuf_swap(sb_refname, sb_contents);
+                               refname = sb_refname->buf;
                                if (flags)
                                        *flags |= REF_ISSYMREF;
                                if (resolve_flags & RESOLVE_REF_NO_RECURSE) {
@@ -1695,28 +1716,26 @@ static const char *resolve_ref_unsafe_1(const char *refname,
                        else
                                return NULL;
                }
-               len = read_in_full(fd, buffer, sizeof(buffer)-1);
-               if (len < 0) {
+               strbuf_reset(sb_contents);
+               if (strbuf_read(sb_contents, fd, 256) < 0) {
                        int save_errno = errno;
                        close(fd);
                        errno = save_errno;
                        return NULL;
                }
                close(fd);
-               while (len && isspace(buffer[len-1]))
-                       len--;
-               buffer[len] = '\0';
+               strbuf_rtrim(sb_contents);
 
                /*
                 * Is it a symbolic ref?
                 */
-               if (!starts_with(buffer, "ref:")) {
+               if (!starts_with(sb_contents->buf, "ref:")) {
                        /*
                         * Please note that FETCH_HEAD has a second
                         * line containing other data.
                         */
-                       if (get_sha1_hex(buffer, sha1) ||
-                           (buffer[40] != '\0' && !isspace(buffer[40]))) {
+                       if (get_sha1_hex(sb_contents->buf, sha1) ||
+                           (sb_contents->buf[40] != '\0' && !isspace(sb_contents->buf[40]))) {
                                if (flags)
                                        *flags |= REF_ISBROKEN;
                                errno = EINVAL;
@@ -1731,10 +1750,12 @@ static const char *resolve_ref_unsafe_1(const char *refname,
                }
                if (flags)
                        *flags |= REF_ISSYMREF;
-               buf = buffer + 4;
+               buf = sb_contents->buf + 4;
                while (isspace(*buf))
                        buf++;
-               refname = strcpy(refname_buffer, buf);
+               strbuf_reset(sb_refname);
+               strbuf_addstr(sb_refname, buf);
+               refname = sb_refname->buf;
                if (resolve_flags & RESOLVE_REF_NO_RECURSE) {
                        hashclr(sha1);
                        return refname;
@@ -1756,10 +1777,15 @@ static const char *resolve_ref_unsafe_1(const char *refname,
 const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
                               unsigned char *sha1, int *flags)
 {
+       static struct strbuf sb_refname = STRBUF_INIT;
+       struct strbuf sb_contents = STRBUF_INIT;
        struct strbuf sb_path = STRBUF_INIT;
-       const char *ret = resolve_ref_unsafe_1(refname, resolve_flags,
-                                              sha1, flags, &sb_path);
+       const char *ret;
+
+       ret = resolve_ref_1(refname, resolve_flags, sha1, flags,
+                           &sb_refname, &sb_path, &sb_contents);
        strbuf_release(&sb_path);
+       strbuf_release(&sb_contents);
        return ret;
 }
 
@@ -2108,6 +2134,15 @@ int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
        return do_for_each_ref(&ref_cache, prefix, fn, strlen(prefix), 0, cb_data);
 }
 
+int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken)
+{
+       unsigned int flag = 0;
+
+       if (broken)
+               flag = DO_FOR_EACH_INCLUDE_BROKEN;
+       return do_for_each_ref(&ref_cache, prefix, fn, 0, flag, cb_data);
+}
+
 int for_each_ref_in_submodule(const char *submodule, const char *prefix,
                each_ref_fn fn, void *cb_data)
 {
@@ -2190,8 +2225,7 @@ int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
 
        if (!has_glob_specials(pattern)) {
                /* Append implied '/' '*' if not present. */
-               if (real_pattern.buf[real_pattern.len - 1] != '/')
-                       strbuf_addch(&real_pattern, '/');
+               strbuf_complete(&real_pattern, '/');
                /* No need to check for '*', there is none. */
                strbuf_addch(&real_pattern, '*');
        }
@@ -2649,6 +2683,8 @@ struct pack_refs_cb_data {
        struct ref_to_prune *ref_to_prune;
 };
 
+static int is_per_worktree_ref(const char *refname);
+
 /*
  * An each_ref_entry_fn that is run over loose references only.  If
  * the loose reference can be packed, add an entry in the packed ref
@@ -2662,6 +2698,10 @@ static int pack_if_possible_fn(struct ref_entry *entry, void *cb_data)
        struct ref_entry *packed_entry;
        int is_tag_ref = starts_with(entry->name, "refs/tags/");
 
+       /* Do not pack per-worktree refs: */
+       if (is_per_worktree_ref(entry->name))
+               return 0;
+
        /* ALWAYS pack tags */
        if (!(cb->flags & PACK_REFS_ALL) && !is_tag_ref)
                return 0;
@@ -2692,7 +2732,7 @@ static int pack_if_possible_fn(struct ref_entry *entry, void *cb_data)
                int namelen = strlen(entry->name) + 1;
                struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
                hashcpy(n->sha1, entry->u.value.oid.hash);
-               strcpy(n->name, entry->name);
+               memcpy(n->name, entry->name, namelen); /* includes NUL */
                n->next = cb->ref_to_prune;
                cb->ref_to_prune = n;
        }
@@ -2856,7 +2896,8 @@ static int delete_ref_loose(struct ref_lock *lock, int flag, struct strbuf *err)
 
 static int is_per_worktree_ref(const char *refname)
 {
-       return !strcmp(refname, "HEAD");
+       return !strcmp(refname, "HEAD") ||
+               starts_with(refname, "refs/bisect/");
 }
 
 static int is_pseudoref_syntax(const char *refname)
@@ -3326,10 +3367,10 @@ static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
        msglen = msg ? strlen(msg) : 0;
        maxlen = strlen(committer) + msglen + 100;
        logrec = xmalloc(maxlen);
-       len = sprintf(logrec, "%s %s %s\n",
-                     sha1_to_hex(old_sha1),
-                     sha1_to_hex(new_sha1),
-                     committer);
+       len = xsnprintf(logrec, maxlen, "%s %s %s\n",
+                       sha1_to_hex(old_sha1),
+                       sha1_to_hex(new_sha1),
+                       committer);
        if (msglen)
                len += copy_msg(logrec + len - 1, msg) - 1;
 
@@ -3981,10 +4022,10 @@ void ref_transaction_free(struct ref_transaction *transaction)
 static struct ref_update *add_update(struct ref_transaction *transaction,
                                     const char *refname)
 {
-       size_t len = strlen(refname);
-       struct ref_update *update = xcalloc(1, sizeof(*update) + len + 1);
+       size_t len = strlen(refname) + 1;
+       struct ref_update *update = xcalloc(1, sizeof(*update) + len);
 
-       strcpy((char *)update->refname, refname);
+       memcpy((char *)update->refname, refname, len); /* includes NUL */
        ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc);
        transaction->updates[transaction->nr++] = update;
        return update;
@@ -4493,7 +4534,7 @@ int parse_hide_refs_config(const char *var, const char *value, const char *secti
        return 0;
 }
 
-int ref_is_hidden(const char *refname)
+int ref_is_hidden(const char *refname, const char *refname_full)
 {
        int i;
 
@@ -4501,6 +4542,7 @@ int ref_is_hidden(const char *refname)
                return 0;
        for (i = hide_refs->nr - 1; i >= 0; i--) {
                const char *match = hide_refs->items[i].string;
+               const char *subject;
                int neg = 0;
                int len;
 
@@ -4509,10 +4551,18 @@ int ref_is_hidden(const char *refname)
                        match++;
                }
 
-               if (!starts_with(refname, match))
+               if (*match == '^') {
+                       subject = refname_full;
+                       match++;
+               } else {
+                       subject = refname;
+               }
+
+               /* refname can be NULL when namespaces are used. */
+               if (!subject || !starts_with(subject, match))
                        continue;
                len = strlen(match);
-               if (!refname[len] || refname[len] == '/')
+               if (!subject[len] || subject[len] == '/')
                        return !neg;
        }
        return 0;