rollback_packed_refs(): take a `packed_ref_store *` parameter
[gitweb.git] / ref-filter.c
index 92c2d4fe70794501c5c112e4c0008a4583d22370..25ca56d62f109ade97d7106ebbba6e40a828c2ab 100644 (file)
 #include "version.h"
 #include "trailer.h"
 #include "wt-status.h"
+#include "commit-slab.h"
+
+static struct ref_msg {
+       const char *gone;
+       const char *ahead;
+       const char *behind;
+       const char *ahead_behind;
+} msgs = {
+        /* Untranslated plumbing messages: */
+       "gone",
+       "ahead %d",
+       "behind %d",
+       "ahead %d, behind %d"
+};
+
+void setup_ref_filter_porcelain_msg(void)
+{
+       msgs.gone = _("gone");
+       msgs.ahead = _("ahead %d");
+       msgs.behind = _("behind %d");
+       msgs.ahead_behind = _("ahead %d, behind %d");
+}
 
 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
 typedef enum { COMPARE_EQUAL, COMPARE_UNEQUAL, COMPARE_NONE } cmp_status;
@@ -32,6 +54,11 @@ struct if_then_else {
                condition_satisfied : 1;
 };
 
+struct refname_atom {
+       enum { R_NORMAL, R_SHORT, R_LSTRIP, R_RSTRIP } option;
+       int lstrip, rstrip;
+};
+
 /*
  * An atom is a valid field atom listed below, possibly prefixed with
  * a "*" to denote deref_tag().
@@ -48,8 +75,11 @@ static struct used_atom {
        union {
                char color[COLOR_MAXLEN];
                struct align align;
-               enum { RR_NORMAL, RR_SHORTEN, RR_TRACK, RR_TRACKSHORT }
-                       remote_ref;
+               struct {
+                       enum { RR_REF, RR_TRACK, RR_TRACKSHORT } option;
+                       struct refname_atom refname;
+                       unsigned int nobracket : 1;
+               } remote_ref;
                struct {
                        enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB, C_TRAILERS } option;
                        unsigned int nlines;
@@ -62,6 +92,7 @@ static struct used_atom {
                        enum { O_FULL, O_LENGTH, O_SHORT } option;
                        unsigned int length;
                } objectname;
+               struct refname_atom refname;
        } u;
 } *used_atom;
 static int used_atom_cnt, need_tagged, need_symref;
@@ -75,18 +106,58 @@ static void color_atom_parser(struct used_atom *atom, const char *color_value)
                die(_("unrecognized color: %%(color:%s)"), color_value);
 }
 
-static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
+static void refname_atom_parser_internal(struct refname_atom *atom,
+                                        const char *arg, const char *name)
 {
        if (!arg)
-               atom->u.remote_ref = RR_NORMAL;
+               atom->option = R_NORMAL;
        else if (!strcmp(arg, "short"))
-               atom->u.remote_ref = RR_SHORTEN;
-       else if (!strcmp(arg, "track"))
-               atom->u.remote_ref = RR_TRACK;
-       else if (!strcmp(arg, "trackshort"))
-               atom->u.remote_ref = RR_TRACKSHORT;
-       else
-               die(_("unrecognized format: %%(%s)"), atom->name);
+               atom->option = R_SHORT;
+       else if (skip_prefix(arg, "lstrip=", &arg) ||
+                skip_prefix(arg, "strip=", &arg)) {
+               atom->option = R_LSTRIP;
+               if (strtol_i(arg, 10, &atom->lstrip))
+                       die(_("Integer value expected refname:lstrip=%s"), arg);
+       } else if (skip_prefix(arg, "rstrip=", &arg)) {
+               atom->option = R_RSTRIP;
+               if (strtol_i(arg, 10, &atom->rstrip))
+                       die(_("Integer value expected refname:rstrip=%s"), arg);
+       } else
+               die(_("unrecognized %%(%s) argument: %s"), name, arg);
+}
+
+static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
+{
+       struct string_list params = STRING_LIST_INIT_DUP;
+       int i;
+
+       if (!arg) {
+               atom->u.remote_ref.option = RR_REF;
+               refname_atom_parser_internal(&atom->u.remote_ref.refname,
+                                            arg, atom->name);
+               return;
+       }
+
+       atom->u.remote_ref.nobracket = 0;
+       string_list_split(&params, arg, ',', -1);
+
+       for (i = 0; i < params.nr; i++) {
+               const char *s = params.items[i].string;
+
+               if (!strcmp(s, "track"))
+                       atom->u.remote_ref.option = RR_TRACK;
+               else if (!strcmp(s, "trackshort"))
+                       atom->u.remote_ref.option = RR_TRACKSHORT;
+               else if (!strcmp(s, "nobracket"))
+                       atom->u.remote_ref.nobracket = 1;
+               else {
+                       atom->u.remote_ref.option = RR_REF;
+                       refname_atom_parser_internal(&atom->u.remote_ref.refname,
+                                                    arg, atom->name);
+               }
+       }
+
+       string_list_clear(&params, 0);
 }
 
 static void body_atom_parser(struct used_atom *atom, const char *arg)
@@ -147,6 +218,11 @@ static void objectname_atom_parser(struct used_atom *atom, const char *arg)
                die(_("unrecognized %%(objectname) argument: %s"), arg);
 }
 
+static void refname_atom_parser(struct used_atom *atom, const char *arg)
+{
+       return refname_atom_parser_internal(&atom->u.refname, arg, atom->name);
+}
+
 static align_type parse_align_position(const char *s)
 {
        if (!strcmp(s, "right"))
@@ -217,7 +293,7 @@ static struct {
        cmp_type cmp_type;
        void (*parser)(struct used_atom *atom, const char *arg);
 } valid_atom[] = {
-       { "refname" },
+       { "refname" , FIELD_STR, refname_atom_parser },
        { "objecttype" },
        { "objectsize", FIELD_ULONG },
        { "objectname", FIELD_STR, objectname_atom_parser },
@@ -247,7 +323,7 @@ static struct {
        { "contents", FIELD_STR, contents_atom_parser },
        { "upstream", FIELD_STR, remote_ref_atom_parser },
        { "push", FIELD_STR, remote_ref_atom_parser },
-       { "symref" },
+       { "symref", FIELD_STR, refname_atom_parser },
        { "flag" },
        { "HEAD" },
        { "color", FIELD_STR, color_atom_parser },
@@ -275,7 +351,7 @@ struct ref_formatting_state {
 struct atom_value {
        const char *s;
        void (*handler)(struct atom_value *atomv, struct ref_formatting_state *state);
-       unsigned long ul; /* used for sorting when not FIELD_STR */
+       uintmax_t value; /* used for sorting when not FIELD_STR */
        struct used_atom *atom;
 };
 
@@ -333,7 +409,7 @@ int parse_ref_filter_atom(const char *atom, const char *ep)
                valid_atom[i].parser(&used_atom[at], arg);
        if (*atom == '*')
                need_tagged = 1;
-       if (!strcmp(used_atom[at].name, "symref"))
+       if (!strcmp(valid_atom[i].name, "symref"))
                need_symref = 1;
        return at;
 }
@@ -601,13 +677,13 @@ int verify_ref_format(const char *format)
  * by the "struct object" representation, set *eaten as well---it is a
  * signal from parse_object_buffer to us not to free the buffer.
  */
-static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
+static void *get_obj(const struct object_id *oid, struct object **obj, unsigned long *sz, int *eaten)
 {
        enum object_type type;
-       void *buf = read_sha1_file(sha1, &type, sz);
+       void *buf = read_sha1_file(oid->hash, &type, sz);
 
        if (buf)
-               *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
+               *obj = parse_object_buffer(oid, type, *sz, buf, eaten);
        else
                *obj = NULL;
        return buf;
@@ -647,7 +723,7 @@ static void grab_common_values(struct atom_value *val, int deref, struct object
                if (!strcmp(name, "objecttype"))
                        v->s = typename(obj->type);
                else if (!strcmp(name, "objectsize")) {
-                       v->ul = sz;
+                       v->value = sz;
                        v->s = xstrfmt("%lu", sz);
                }
                else if (deref)
@@ -694,8 +770,8 @@ static void grab_commit_values(struct atom_value *val, int deref, struct object
                        v->s = xstrdup(oid_to_hex(&commit->tree->object.oid));
                }
                else if (!strcmp(name, "numparent")) {
-                       v->ul = commit_list_count(commit->parents);
-                       v->s = xstrfmt("%lu", v->ul);
+                       v->value = commit_list_count(commit->parents);
+                       v->s = xstrfmt("%lu", (unsigned long)v->value);
                }
                else if (!strcmp(name, "parent")) {
                        struct commit_list *parents;
@@ -773,7 +849,7 @@ static void grab_date(const char *buf, struct atom_value *v, const char *atomnam
 {
        const char *eoemail = strstr(buf, "> ");
        char *zone;
-       unsigned long timestamp;
+       timestamp_t timestamp;
        long tz;
        struct date_mode date_mode = { DATE_NORMAL };
        const char *formatp;
@@ -792,18 +868,18 @@ static void grab_date(const char *buf, struct atom_value *v, const char *atomnam
 
        if (!eoemail)
                goto bad;
-       timestamp = strtoul(eoemail + 2, &zone, 10);
-       if (timestamp == ULONG_MAX)
+       timestamp = parse_timestamp(eoemail + 2, &zone, 10);
+       if (timestamp == TIME_MAX)
                goto bad;
        tz = strtol(zone, NULL, 10);
        if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
                goto bad;
        v->s = xstrdup(show_date(timestamp, tz, &date_mode));
-       v->ul = timestamp;
+       v->value = timestamp;
        return;
  bad:
        v->s = "";
-       v->ul = 0;
+       v->value = 0;
 }
 
 /* See grab_values */
@@ -1042,50 +1118,108 @@ static inline char *copy_advance(char *dst, const char *src)
        return dst;
 }
 
-static const char *strip_ref_components(const char *refname, const char *nr_arg)
+static const char *lstrip_ref_components(const char *refname, int len)
 {
-       char *end;
-       long nr = strtol(nr_arg, &end, 10);
-       long remaining = nr;
+       long remaining = len;
        const char *start = refname;
 
-       if (nr < 1 || *end != '\0')
-               die(_(":strip= requires a positive integer argument"));
+       if (len < 0) {
+               int i;
+               const char *p = refname;
 
-       while (remaining) {
+               /* Find total no of '/' separated path-components */
+               for (i = 0; p[i]; p[i] == '/' ? i++ : *p++)
+                       ;
+               /*
+                * The number of components we need to strip is now
+                * the total minus the components to be left (Plus one
+                * because we count the number of '/', but the number
+                * of components is one more than the no of '/').
+                */
+               remaining = i + len + 1;
+       }
+
+       while (remaining > 0) {
                switch (*start++) {
                case '\0':
-                       die(_("ref '%s' does not have %ld components to :strip"),
-                           refname, nr);
+                       return "";
                case '/':
                        remaining--;
                        break;
                }
        }
+
        return start;
 }
 
+static const char *rstrip_ref_components(const char *refname, int len)
+{
+       long remaining = len;
+       char *start = xstrdup(refname);
+
+       if (len < 0) {
+               int i;
+               const char *p = refname;
+
+               /* Find total no of '/' separated path-components */
+               for (i = 0; p[i]; p[i] == '/' ? i++ : *p++)
+                       ;
+               /*
+                * The number of components we need to strip is now
+                * the total minus the components to be left (Plus one
+                * because we count the number of '/', but the number
+                * of components is one more than the no of '/').
+                */
+               remaining = i + len + 1;
+       }
+
+       while (remaining-- > 0) {
+               char *p = strrchr(start, '/');
+               if (p == NULL)
+                       return "";
+               else
+                       p[0] = '\0';
+       }
+       return start;
+}
+
+static const char *show_ref(struct refname_atom *atom, const char *refname)
+{
+       if (atom->option == R_SHORT)
+               return shorten_unambiguous_ref(refname, warn_ambiguous_refs);
+       else if (atom->option == R_LSTRIP)
+               return lstrip_ref_components(refname, atom->lstrip);
+       else if (atom->option == R_RSTRIP)
+               return rstrip_ref_components(refname, atom->rstrip);
+       else
+               return refname;
+}
+
 static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
                                    struct branch *branch, const char **s)
 {
        int num_ours, num_theirs;
-       if (atom->u.remote_ref == RR_SHORTEN)
-               *s = shorten_unambiguous_ref(refname, warn_ambiguous_refs);
-       else if (atom->u.remote_ref == RR_TRACK) {
+       if (atom->u.remote_ref.option == RR_REF)
+               *s = show_ref(&atom->u.remote_ref.refname, refname);
+       else if (atom->u.remote_ref.option == RR_TRACK) {
                if (stat_tracking_info(branch, &num_ours,
-                                      &num_theirs, NULL))
-                       return;
-
-               if (!num_ours && !num_theirs)
+                                      &num_theirs, NULL)) {
+                       *s = xstrdup(msgs.gone);
+               } else if (!num_ours && !num_theirs)
                        *s = "";
                else if (!num_ours)
-                       *s = xstrfmt("[behind %d]", num_theirs);
+                       *s = xstrfmt(msgs.behind, num_theirs);
                else if (!num_theirs)
-                       *s = xstrfmt("[ahead %d]", num_ours);
+                       *s = xstrfmt(msgs.ahead, num_ours);
                else
-                       *s = xstrfmt("[ahead %d, behind %d]",
+                       *s = xstrfmt(msgs.ahead_behind,
                                     num_ours, num_theirs);
-       } else if (atom->u.remote_ref == RR_TRACKSHORT) {
+               if (!atom->u.remote_ref.nobracket && *s[0]) {
+                       const char *to_free = *s;
+                       *s = xstrfmt("[%s]", *s);
+                       free((void *)to_free);
+               }
+       } else if (atom->u.remote_ref.option == RR_TRACKSHORT) {
                if (stat_tracking_info(branch, &num_ours,
                                       &num_theirs, NULL))
                        return;
@@ -1098,8 +1232,8 @@ static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
                        *s = ">";
                else
                        *s = "<>";
-       } else /* RR_NORMAL */
-               *s = refname;
+       } else
+               die("BUG: unhandled RR_* enum");
 }
 
 char *get_head_description(void)
@@ -1116,12 +1250,14 @@ char *get_head_description(void)
                strbuf_addf(&desc, _("(no branch, bisect started on %s)"),
                            state.branch);
        else if (state.detached_from) {
-               /* TRANSLATORS: make sure these match _("HEAD detached at ")
-                  and _("HEAD detached from ") in wt-status.c */
                if (state.detached_at)
+                       /* TRANSLATORS: make sure this matches
+                          "HEAD detached at " in wt-status.c */
                        strbuf_addf(&desc, _("(HEAD detached at %s)"),
                                state.detached_from);
                else
+                       /* TRANSLATORS: make sure this matches
+                          "HEAD detached from " in wt-status.c */
                        strbuf_addf(&desc, _("(HEAD detached from %s)"),
                                state.detached_from);
        }
@@ -1133,6 +1269,21 @@ char *get_head_description(void)
        return strbuf_detach(&desc, NULL);
 }
 
+static const char *get_symref(struct used_atom *atom, struct ref_array_item *ref)
+{
+       if (!ref->symref)
+               return "";
+       else
+               return show_ref(&atom->u.refname, ref->symref);
+}
+
+static const char *get_refname(struct used_atom *atom, struct ref_array_item *ref)
+{
+       if (ref->kind & FILTER_REFS_DETACHED_HEAD)
+               return get_head_description();
+       return show_ref(&atom->u.refname, ref->refname);
+}
+
 /*
  * Parse the object referred by ref, and grab needed value.
  */
@@ -1142,14 +1293,14 @@ static void populate_value(struct ref_array_item *ref)
        struct object *obj;
        int eaten, i;
        unsigned long size;
-       const unsigned char *tagged;
+       const struct object_id *tagged;
 
        ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
 
        if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
-               unsigned char unused1[20];
+               struct object_id unused1;
                ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
-                                            unused1, NULL);
+                                            unused1.hash, NULL);
                if (!ref->symref)
                        ref->symref = "";
        }
@@ -1161,7 +1312,6 @@ static void populate_value(struct ref_array_item *ref)
                struct atom_value *v = &ref->value[i];
                int deref = 0;
                const char *refname;
-               const char *formatp;
                struct branch *branch = NULL;
 
                v->handler = append_atom;
@@ -1172,12 +1322,10 @@ static void populate_value(struct ref_array_item *ref)
                        name++;
                }
 
-               if (starts_with(name, "refname")) {
-                       refname = ref->refname;
-                       if (ref->kind & FILTER_REFS_DETACHED_HEAD)
-                               refname = get_head_description();
-               } else if (starts_with(name, "symref"))
-                       refname = ref->symref ? ref->symref : "";
+               if (starts_with(name, "refname"))
+                       refname = get_refname(atom, ref);
+               else if (starts_with(name, "symref"))
+                       refname = get_symref(atom, ref);
                else if (starts_with(name, "upstream")) {
                        const char *branch_name;
                        /* only local branches may have an upstream */
@@ -1218,14 +1366,14 @@ static void populate_value(struct ref_array_item *ref)
                                v->s = xstrdup(buf + 1);
                        }
                        continue;
-               } else if (!deref && grab_objectname(name, ref->objectname, v, atom)) {
+               } else if (!deref && grab_objectname(name, ref->objectname.hash, v, atom)) {
                        continue;
                } else if (!strcmp(name, "HEAD")) {
                        const char *head;
-                       unsigned char sha1[20];
+                       struct object_id oid;
 
                        head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
-                                                 sha1, NULL);
+                                                 oid.hash, NULL);
                        if (head && !strcmp(ref->refname, head))
                                v->s = "*";
                        else
@@ -1253,21 +1401,6 @@ static void populate_value(struct ref_array_item *ref)
                } else
                        continue;
 
-               formatp = strchr(name, ':');
-               if (formatp) {
-                       const char *arg;
-
-                       formatp++;
-                       if (!strcmp(formatp, "short"))
-                               refname = shorten_unambiguous_ref(refname,
-                                                     warn_ambiguous_refs);
-                       else if (skip_prefix(formatp, "strip=", &arg))
-                               refname = strip_ref_components(refname, arg);
-                       else
-                               die(_("unknown %.*s format %s"),
-                                   (int)(formatp - name), name, formatp);
-               }
-
                if (!deref)
                        v->s = refname;
                else
@@ -1282,13 +1415,13 @@ static void populate_value(struct ref_array_item *ref)
        return;
 
  need_obj:
-       buf = get_obj(ref->objectname, &obj, &size, &eaten);
+       buf = get_obj(&ref->objectname, &obj, &size, &eaten);
        if (!buf)
                die(_("missing object %s for %s"),
-                   sha1_to_hex(ref->objectname), ref->refname);
+                   oid_to_hex(&ref->objectname), ref->refname);
        if (!obj)
                die(_("parse_object_buffer failed on %s for %s"),
-                   sha1_to_hex(ref->objectname), ref->refname);
+                   oid_to_hex(&ref->objectname), ref->refname);
 
        grab_values(ref->value, 0, obj, buf, size);
        if (!eaten)
@@ -1305,7 +1438,7 @@ static void populate_value(struct ref_array_item *ref)
         * If it is a tag object, see if we use a value that derefs
         * the object, and if we do grab the object it refers to.
         */
-       tagged = ((struct tag *)obj)->tagged->oid.hash;
+       tagged = &((struct tag *)obj)->tagged->oid;
 
        /*
         * NEEDSWORK: This derefs tag only once, which
@@ -1316,10 +1449,10 @@ static void populate_value(struct ref_array_item *ref)
        buf = get_obj(tagged, &obj, &size, &eaten);
        if (!buf)
                die(_("missing object %s for %s"),
-                   sha1_to_hex(tagged), ref->refname);
+                   oid_to_hex(tagged), ref->refname);
        if (!obj)
                die(_("parse_object_buffer failed on %s for %s"),
-                   sha1_to_hex(tagged), ref->refname);
+                   oid_to_hex(tagged), ref->refname);
        grab_values(ref->value, 1, obj, buf, size);
        if (!eaten)
                free(buf);
@@ -1338,10 +1471,23 @@ static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom
        *v = &ref->value[atom];
 }
 
+/*
+ * Unknown has to be "0" here, because that's the default value for
+ * contains_cache slab entries that have not yet been assigned.
+ */
 enum contains_result {
-       CONTAINS_UNKNOWN = -1,
-       CONTAINS_NO = 0,
-       CONTAINS_YES = 1
+       CONTAINS_UNKNOWN = 0,
+       CONTAINS_NO,
+       CONTAINS_YES
+};
+
+define_commit_slab(contains_cache, enum contains_result);
+
+struct ref_filter_cbdata {
+       struct ref_array *array;
+       struct ref_filter *filter;
+       struct contains_cache contains_cache;
+       struct contains_cache no_contains_cache;
 };
 
 /*
@@ -1372,24 +1518,24 @@ static int in_commit_list(const struct commit_list *want, struct commit *c)
  * Do not recurse to find out, though, but return -1 if inconclusive.
  */
 static enum contains_result contains_test(struct commit *candidate,
-                           const struct commit_list *want)
+                                         const struct commit_list *want,
+                                         struct contains_cache *cache)
 {
-       /* was it previously marked as containing a want commit? */
-       if (candidate->object.flags & TMP_MARK)
-               return 1;
-       /* or marked as not possibly containing a want commit? */
-       if (candidate->object.flags & UNINTERESTING)
-               return 0;
+       enum contains_result *cached = contains_cache_at(cache, candidate);
+
+       /* If we already have the answer cached, return that. */
+       if (*cached)
+               return *cached;
+
        /* or are we it? */
        if (in_commit_list(want, candidate)) {
-               candidate->object.flags |= TMP_MARK;
-               return 1;
+               *cached = CONTAINS_YES;
+               return CONTAINS_YES;
        }
 
-       if (parse_commit(candidate) < 0)
-               return 0;
-
-       return -1;
+       /* Otherwise, we don't know; prepare to recurse */
+       parse_commit_or_die(candidate);
+       return CONTAINS_UNKNOWN;
 }
 
 static void push_to_contains_stack(struct commit *candidate, struct contains_stack *contains_stack)
@@ -1400,10 +1546,11 @@ static void push_to_contains_stack(struct commit *candidate, struct contains_sta
 }
 
 static enum contains_result contains_tag_algo(struct commit *candidate,
-               const struct commit_list *want)
+                                             const struct commit_list *want,
+                                             struct contains_cache *cache)
 {
        struct contains_stack contains_stack = { 0, 0, NULL };
-       int result = contains_test(candidate, want);
+       enum contains_result result = contains_test(candidate, want, cache);
 
        if (result != CONTAINS_UNKNOWN)
                return result;
@@ -1415,16 +1562,16 @@ static enum contains_result contains_tag_algo(struct commit *candidate,
                struct commit_list *parents = entry->parents;
 
                if (!parents) {
-                       commit->object.flags |= UNINTERESTING;
+                       *contains_cache_at(cache, commit) = CONTAINS_NO;
                        contains_stack.nr--;
                }
                /*
                 * If we just popped the stack, parents->item has been marked,
-                * therefore contains_test will return a meaningful 0 or 1.
+                * therefore contains_test will return a meaningful yes/no.
                 */
-               else switch (contains_test(parents->item, want)) {
+               else switch (contains_test(parents->item, want, cache)) {
                case CONTAINS_YES:
-                       commit->object.flags |= TMP_MARK;
+                       *contains_cache_at(cache, commit) = CONTAINS_YES;
                        contains_stack.nr--;
                        break;
                case CONTAINS_NO:
@@ -1436,14 +1583,15 @@ static enum contains_result contains_tag_algo(struct commit *candidate,
                }
        }
        free(contains_stack.contains_stack);
-       return contains_test(candidate, want);
+       return contains_test(candidate, want, cache);
 }
 
-static int commit_contains(struct ref_filter *filter, struct commit *commit)
+static int commit_contains(struct ref_filter *filter, struct commit *commit,
+                          struct commit_list *list, struct contains_cache *cache)
 {
        if (filter->with_commit_tag_algo)
-               return contains_tag_algo(commit, filter->with_commit);
-       return is_descendant_of(commit, filter->with_commit);
+               return contains_tag_algo(commit, list, cache) == CONTAINS_YES;
+       return is_descendant_of(commit, list);
 }
 
 /*
@@ -1517,6 +1665,68 @@ static int filter_pattern_match(struct ref_filter *filter, const char *refname)
        return match_pattern(filter, refname);
 }
 
+/*
+ * Find the longest prefix of pattern we can pass to
+ * `for_each_fullref_in()`, namely the part of pattern preceding the
+ * first glob character. (Note that `for_each_fullref_in()` is
+ * perfectly happy working with a prefix that doesn't end at a
+ * pathname component boundary.)
+ */
+static void find_longest_prefix(struct strbuf *out, const char *pattern)
+{
+       const char *p;
+
+       for (p = pattern; *p && !is_glob_special(*p); p++)
+               ;
+
+       strbuf_add(out, pattern, p - pattern);
+}
+
+/*
+ * This is the same as for_each_fullref_in(), but it tries to iterate
+ * only over the patterns we'll care about. Note that it _doesn't_ do a full
+ * pattern match, so the callback still has to match each ref individually.
+ */
+static int for_each_fullref_in_pattern(struct ref_filter *filter,
+                                      each_ref_fn cb,
+                                      void *cb_data,
+                                      int broken)
+{
+       struct strbuf prefix = STRBUF_INIT;
+       int ret;
+
+       if (!filter->match_as_path) {
+               /*
+                * in this case, the patterns are applied after
+                * prefixes like "refs/heads/" etc. are stripped off,
+                * so we have to look at everything:
+                */
+               return for_each_fullref_in("", cb, cb_data, broken);
+       }
+
+       if (!filter->name_patterns[0]) {
+               /* no patterns; we have to look at everything */
+               return for_each_fullref_in("", cb, cb_data, broken);
+       }
+
+       if (filter->name_patterns[1]) {
+               /*
+                * multiple patterns; in theory this could still work as long
+                * as the patterns are disjoint. We'd just make multiple calls
+                * to for_each_ref(). But if they're not disjoint, we'd end up
+                * reporting the same ref multiple times. So let's punt on that
+                * for now.
+                */
+               return for_each_fullref_in("", cb, cb_data, broken);
+       }
+
+       find_longest_prefix(&prefix, filter->name_patterns[0]);
+
+       ret = for_each_fullref_in(prefix.buf, cb, cb_data, broken);
+       strbuf_release(&prefix);
+       return ret;
+}
+
 /*
  * Given a ref (sha1, refname), check if the ref belongs to the array
  * of sha1s. If the given ref is a tag, check if the given tag points
@@ -1530,22 +1740,22 @@ static int filter_pattern_match(struct ref_filter *filter, const char *refname)
  * the need to parse the object via parse_object(). peel_ref() might be a
  * more efficient alternative to obtain the pointee.
  */
-static const unsigned char *match_points_at(struct sha1_array *points_at,
-                                           const unsigned char *sha1,
-                                           const char *refname)
+static const struct object_id *match_points_at(struct oid_array *points_at,
+                                              const struct object_id *oid,
+                                              const char *refname)
 {
-       const unsigned char *tagged_sha1 = NULL;
+       const struct object_id *tagged_oid = NULL;
        struct object *obj;
 
-       if (sha1_array_lookup(points_at, sha1) >= 0)
-               return sha1;
-       obj = parse_object(sha1);
+       if (oid_array_lookup(points_at, oid) >= 0)
+               return oid;
+       obj = parse_object(oid);
        if (!obj)
                die(_("malformed object at '%s'"), refname);
        if (obj->type == OBJ_TAG)
-               tagged_sha1 = ((struct tag *)obj)->tagged->oid.hash;
-       if (tagged_sha1 && sha1_array_lookup(points_at, tagged_sha1) >= 0)
-               return tagged_sha1;
+               tagged_oid = &((struct tag *)obj)->tagged->oid;
+       if (tagged_oid && oid_array_lookup(points_at, tagged_oid) >= 0)
+               return tagged_oid;
        return NULL;
 }
 
@@ -1556,13 +1766,13 @@ static struct ref_array_item *new_ref_array_item(const char *refname,
 {
        struct ref_array_item *ref;
        FLEX_ALLOC_STR(ref, refname, refname);
-       hashcpy(ref->objectname, objectname);
+       hashcpy(ref->objectname.hash, objectname);
        ref->flag = flag;
 
        return ref;
 }
 
-static int filter_ref_kind(struct ref_filter *filter, const char *refname)
+static int ref_kind_from_refname(const char *refname)
 {
        unsigned int i;
 
@@ -1575,11 +1785,7 @@ static int filter_ref_kind(struct ref_filter *filter, const char *refname)
                { "refs/tags/", FILTER_REFS_TAGS}
        };
 
-       if (filter->kind == FILTER_REFS_BRANCHES ||
-           filter->kind == FILTER_REFS_REMOTES ||
-           filter->kind == FILTER_REFS_TAGS)
-               return filter->kind;
-       else if (!strcmp(refname, "HEAD"))
+       if (!strcmp(refname, "HEAD"))
                return FILTER_REFS_DETACHED_HEAD;
 
        for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
@@ -1590,6 +1796,15 @@ static int filter_ref_kind(struct ref_filter *filter, const char *refname)
        return FILTER_REFS_OTHERS;
 }
 
+static int filter_ref_kind(struct ref_filter *filter, const char *refname)
+{
+       if (filter->kind == FILTER_REFS_BRANCHES ||
+           filter->kind == FILTER_REFS_REMOTES ||
+           filter->kind == FILTER_REFS_TAGS)
+               return filter->kind;
+       return ref_kind_from_refname(refname);
+}
+
 /*
  * A call-back given to for_each_ref().  Filter refs and keep them for
  * later object processing.
@@ -1620,7 +1835,7 @@ static int ref_filter_handler(const char *refname, const struct object_id *oid,
        if (!filter_pattern_match(filter, refname))
                return 0;
 
-       if (filter->points_at.nr && !match_points_at(&filter->points_at, oid->hash, refname))
+       if (filter->points_at.nr && !match_points_at(&filter->points_at, oid, refname))
                return 0;
 
        /*
@@ -1628,13 +1843,17 @@ static int ref_filter_handler(const char *refname, const struct object_id *oid,
         * obtain the commit using the 'oid' available and discard all
         * non-commits early. The actual filtering is done later.
         */
-       if (filter->merge_commit || filter->with_commit || filter->verbose) {
-               commit = lookup_commit_reference_gently(oid->hash, 1);
+       if (filter->merge_commit || filter->with_commit || filter->no_commit || filter->verbose) {
+               commit = lookup_commit_reference_gently(oid, 1);
                if (!commit)
                        return 0;
-               /* We perform the filtering for the '--contains' option */
+               /* We perform the filtering for the '--contains' option... */
                if (filter->with_commit &&
-                   !commit_contains(filter, commit))
+                   !commit_contains(filter, commit, filter->with_commit, &ref_cbdata->contains_cache))
+                       return 0;
+               /* ...or for the `--no-contains' option */
+               if (filter->no_commit &&
+                   commit_contains(filter, commit, filter->no_commit, &ref_cbdata->no_contains_cache))
                        return 0;
        }
 
@@ -1734,6 +1953,9 @@ int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int
                broken = 1;
        filter->kind = type & FILTER_REFS_KIND_MASK;
 
+       init_contains_cache(&ref_cbdata.contains_cache);
+       init_contains_cache(&ref_cbdata.no_contains_cache);
+
        /*  Simple per-ref filtering */
        if (!filter->kind)
                die("filter_refs: invalid type");
@@ -1751,11 +1973,13 @@ int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int
                else if (filter->kind == FILTER_REFS_TAGS)
                        ret = for_each_fullref_in("refs/tags/", ref_filter_handler, &ref_cbdata, broken);
                else if (filter->kind & FILTER_REFS_ALL)
-                       ret = for_each_fullref_in("", ref_filter_handler, &ref_cbdata, broken);
+                       ret = for_each_fullref_in_pattern(filter, ref_filter_handler, &ref_cbdata, broken);
                if (!ret && (filter->kind & FILTER_REFS_DETACHED_HEAD))
                        head_ref(ref_filter_handler, &ref_cbdata);
        }
 
+       clear_contains_cache(&ref_cbdata.contains_cache);
+       clear_contains_cache(&ref_cbdata.no_contains_cache);
 
        /*  Filters that need revision walking */
        if (filter->merge_commit)
@@ -1779,9 +2003,9 @@ static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
        else if (cmp_type == FIELD_STR)
                cmp = cmp_fn(va->s, vb->s);
        else {
-               if (va->ul < vb->ul)
+               if (va->value < vb->value)
                        cmp = -1;
-               else if (va->ul == vb->ul)
+               else if (va->value == vb->value)
                        cmp = cmp_fn(a->refname, b->refname);
                else
                        cmp = 1;
@@ -1790,8 +2014,7 @@ static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
        return (s->reverse) ? -cmp : cmp;
 }
 
-static struct ref_sorting *ref_sorting;
-static int compare_refs(const void *a_, const void *b_)
+static int compare_refs(const void *a_, const void *b_, void *ref_sorting)
 {
        struct ref_array_item *a = *((struct ref_array_item **)a_);
        struct ref_array_item *b = *((struct ref_array_item **)b_);
@@ -1807,8 +2030,7 @@ static int compare_refs(const void *a_, const void *b_)
 
 void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
 {
-       ref_sorting = sorting;
-       QSORT(array->items, array->nr, compare_refs);
+       QSORT_S(array->items, array->nr, compare_refs, sorting);
 }
 
 static void append_literal(const char *cp, const char *ep, struct ref_formatting_state *state)
@@ -1880,6 +2102,16 @@ void show_ref_array_item(struct ref_array_item *info, const char *format, int qu
        putchar('\n');
 }
 
+void pretty_print_ref(const char *name, const unsigned char *sha1,
+               const char *format)
+{
+       struct ref_array_item *ref_item;
+       ref_item = new_ref_array_item(name, sha1, 0);
+       ref_item->kind = ref_kind_from_refname(name);
+       show_ref_array_item(ref_item, format, 0);
+       free_array_item(ref_item);
+}
+
 /*  If no sorting option is given, use refname to sort as default */
 struct ref_sorting *ref_default_sorting(void)
 {
@@ -1920,16 +2152,25 @@ int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
 int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
 {
        struct ref_filter *rf = opt->value;
-       unsigned char sha1[20];
+       struct object_id oid;
+       int no_merged = starts_with(opt->long_name, "no");
+
+       if (rf->merge) {
+               if (no_merged) {
+                       return opterror(opt, "is incompatible with --merged", 0);
+               } else {
+                       return opterror(opt, "is incompatible with --no-merged", 0);
+               }
+       }
 
-       rf->merge = starts_with(opt->long_name, "no")
+       rf->merge = no_merged
                ? REF_FILTER_MERGED_OMIT
                : REF_FILTER_MERGED_INCLUDE;
 
-       if (get_sha1(arg, sha1))
+       if (get_oid(arg, &oid))
                die(_("malformed object name %s"), arg);
 
-       rf->merge_commit = lookup_commit_reference_gently(sha1, 0);
+       rf->merge_commit = lookup_commit_reference_gently(&oid, 0);
        if (!rf->merge_commit)
                return opterror(opt, "must point to a commit", 0);