regex: use regexec_buf()
[gitweb.git] / builtin / for-each-ref.c
index cb7db230d3ef76ee6a8b73971cbdabcc6d6590a9..4e9f6c29bf1e0c1cc7b44548f49077c2e4a81ec8 100644 (file)
 #include "cache.h"
 #include "refs.h"
 #include "object.h"
-#include "tag.h"
-#include "commit.h"
-#include "tree.h"
-#include "blob.h"
-#include "quote.h"
 #include "parse-options.h"
-#include "remote.h"
-#include "color.h"
-
-/* Quoting styles */
-#define QUOTE_NONE 0
-#define QUOTE_SHELL 1
-#define QUOTE_PERL 2
-#define QUOTE_PYTHON 4
-#define QUOTE_TCL 8
-
-typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
-
-struct atom_value {
-       const char *s;
-       unsigned long ul; /* used for sorting when not FIELD_STR */
-};
-
-struct ref_sort {
-       struct ref_sort *next;
-       int atom; /* index into used_atom array */
-       unsigned reverse : 1;
-};
-
-struct refinfo {
-       char *refname;
-       unsigned char objectname[20];
-       int flag;
-       const char *symref;
-       struct atom_value *value;
-};
-
-static struct {
-       const char *name;
-       cmp_type cmp_type;
-} valid_atom[] = {
-       { "refname" },
-       { "objecttype" },
-       { "objectsize", FIELD_ULONG },
-       { "objectname" },
-       { "tree" },
-       { "parent" },
-       { "numparent", FIELD_ULONG },
-       { "object" },
-       { "type" },
-       { "tag" },
-       { "author" },
-       { "authorname" },
-       { "authoremail" },
-       { "authordate", FIELD_TIME },
-       { "committer" },
-       { "committername" },
-       { "committeremail" },
-       { "committerdate", FIELD_TIME },
-       { "tagger" },
-       { "taggername" },
-       { "taggeremail" },
-       { "taggerdate", FIELD_TIME },
-       { "creator" },
-       { "creatordate", FIELD_TIME },
-       { "subject" },
-       { "body" },
-       { "contents" },
-       { "contents:subject" },
-       { "contents:body" },
-       { "contents:signature" },
-       { "upstream" },
-       { "push" },
-       { "symref" },
-       { "flag" },
-       { "HEAD" },
-       { "color" },
-};
-
-/*
- * An atom is a valid field atom listed above, possibly prefixed with
- * a "*" to denote deref_tag().
- *
- * We parse given format string and sort specifiers, and make a list
- * of properties that we need to extract out of objects.  refinfo
- * structure will hold an array of values extracted that can be
- * indexed with the "atom number", which is an index into this
- * array.
- */
-static const char **used_atom;
-static cmp_type *used_atom_type;
-static int used_atom_cnt, need_tagged, need_symref;
-static int need_color_reset_at_eol;
-
-/*
- * Used to parse format string and sort specifiers
- */
-static int parse_atom(const char *atom, const char *ep)
-{
-       const char *sp;
-       int i, at;
-
-       sp = atom;
-       if (*sp == '*' && sp < ep)
-               sp++; /* deref */
-       if (ep <= sp)
-               die("malformed field name: %.*s", (int)(ep-atom), atom);
-
-       /* Do we have the atom already used elsewhere? */
-       for (i = 0; i < used_atom_cnt; i++) {
-               int len = strlen(used_atom[i]);
-               if (len == ep - atom && !memcmp(used_atom[i], atom, len))
-                       return i;
-       }
-
-       /* Is the atom a valid one? */
-       for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
-               int len = strlen(valid_atom[i].name);
-               /*
-                * If the atom name has a colon, strip it and everything after
-                * it off - it specifies the format for this entry, and
-                * shouldn't be used for checking against the valid_atom
-                * table.
-                */
-               const char *formatp = strchr(sp, ':');
-               if (!formatp || ep < formatp)
-                       formatp = ep;
-               if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
-                       break;
-       }
-
-       if (ARRAY_SIZE(valid_atom) <= i)
-               die("unknown field name: %.*s", (int)(ep-atom), atom);
-
-       /* Add it in, including the deref prefix */
-       at = used_atom_cnt;
-       used_atom_cnt++;
-       REALLOC_ARRAY(used_atom, used_atom_cnt);
-       REALLOC_ARRAY(used_atom_type, used_atom_cnt);
-       used_atom[at] = xmemdupz(atom, ep - atom);
-       used_atom_type[at] = valid_atom[i].cmp_type;
-       if (*atom == '*')
-               need_tagged = 1;
-       if (!strcmp(used_atom[at], "symref"))
-               need_symref = 1;
-       return at;
-}
-
-/*
- * In a format string, find the next occurrence of %(atom).
- */
-static const char *find_next(const char *cp)
-{
-       while (*cp) {
-               if (*cp == '%') {
-                       /*
-                        * %( is the start of an atom;
-                        * %% is a quoted per-cent.
-                        */
-                       if (cp[1] == '(')
-                               return cp;
-                       else if (cp[1] == '%')
-                               cp++; /* skip over two % */
-                       /* otherwise this is a singleton, literal % */
-               }
-               cp++;
-       }
-       return NULL;
-}
-
-/*
- * Make sure the format string is well formed, and parse out
- * the used atoms.
- */
-static int verify_format(const char *format)
-{
-       const char *cp, *sp;
-
-       need_color_reset_at_eol = 0;
-       for (cp = format; *cp && (sp = find_next(cp)); ) {
-               const char *color, *ep = strchr(sp, ')');
-               int at;
-
-               if (!ep)
-                       return error("malformed format string %s", sp);
-               /* sp points at "%(" and ep points at the closing ")" */
-               at = parse_atom(sp + 2, ep);
-               cp = ep + 1;
-
-               if (skip_prefix(used_atom[at], "color:", &color))
-                       need_color_reset_at_eol = !!strcmp(color, "reset");
-       }
-       return 0;
-}
-
-/*
- * Given an object name, read the object data and size, and return a
- * "struct object".  If the object data we are returning is also borrowed
- * 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)
-{
-       enum object_type type;
-       void *buf = read_sha1_file(sha1, &type, sz);
-
-       if (buf)
-               *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
-       else
-               *obj = NULL;
-       return buf;
-}
-
-static int grab_objectname(const char *name, const unsigned char *sha1,
-                           struct atom_value *v)
-{
-       if (!strcmp(name, "objectname")) {
-               char *s = xmalloc(41);
-               strcpy(s, sha1_to_hex(sha1));
-               v->s = s;
-               return 1;
-       }
-       if (!strcmp(name, "objectname:short")) {
-               v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
-               return 1;
-       }
-       return 0;
-}
-
-/* See grab_values */
-static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-       int i;
-
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &val[i];
-               if (!!deref != (*name == '*'))
-                       continue;
-               if (deref)
-                       name++;
-               if (!strcmp(name, "objecttype"))
-                       v->s = typename(obj->type);
-               else if (!strcmp(name, "objectsize")) {
-                       char *s = xmalloc(40);
-                       sprintf(s, "%lu", sz);
-                       v->ul = sz;
-                       v->s = s;
-               }
-               else if (deref)
-                       grab_objectname(name, obj->sha1, v);
-       }
-}
-
-/* See grab_values */
-static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-       int i;
-       struct tag *tag = (struct tag *) obj;
-
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &val[i];
-               if (!!deref != (*name == '*'))
-                       continue;
-               if (deref)
-                       name++;
-               if (!strcmp(name, "tag"))
-                       v->s = tag->tag;
-               else if (!strcmp(name, "type") && tag->tagged)
-                       v->s = typename(tag->tagged->type);
-               else if (!strcmp(name, "object") && tag->tagged) {
-                       char *s = xmalloc(41);
-                       strcpy(s, sha1_to_hex(tag->tagged->sha1));
-                       v->s = s;
-               }
-       }
-}
-
-/* See grab_values */
-static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-       int i;
-       struct commit *commit = (struct commit *) obj;
-
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &val[i];
-               if (!!deref != (*name == '*'))
-                       continue;
-               if (deref)
-                       name++;
-               if (!strcmp(name, "tree")) {
-                       char *s = xmalloc(41);
-                       strcpy(s, sha1_to_hex(commit->tree->object.sha1));
-                       v->s = s;
-               }
-               if (!strcmp(name, "numparent")) {
-                       char *s = xmalloc(40);
-                       v->ul = commit_list_count(commit->parents);
-                       sprintf(s, "%lu", v->ul);
-                       v->s = s;
-               }
-               else if (!strcmp(name, "parent")) {
-                       int num = commit_list_count(commit->parents);
-                       int i;
-                       struct commit_list *parents;
-                       char *s = xmalloc(41 * num + 1);
-                       v->s = s;
-                       for (i = 0, parents = commit->parents;
-                            parents;
-                            parents = parents->next, i = i + 41) {
-                               struct commit *parent = parents->item;
-                               strcpy(s+i, sha1_to_hex(parent->object.sha1));
-                               if (parents->next)
-                                       s[i+40] = ' ';
-                       }
-                       if (!i)
-                               *s = '\0';
-               }
-       }
-}
-
-static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
-{
-       const char *eol;
-       while (*buf) {
-               if (!strncmp(buf, who, wholen) &&
-                   buf[wholen] == ' ')
-                       return buf + wholen + 1;
-               eol = strchr(buf, '\n');
-               if (!eol)
-                       return "";
-               eol++;
-               if (*eol == '\n')
-                       return ""; /* end of header */
-               buf = eol;
-       }
-       return "";
-}
-
-static const char *copy_line(const char *buf)
-{
-       const char *eol = strchrnul(buf, '\n');
-       return xmemdupz(buf, eol - buf);
-}
-
-static const char *copy_name(const char *buf)
-{
-       const char *cp;
-       for (cp = buf; *cp && *cp != '\n'; cp++) {
-               if (!strncmp(cp, " <", 2))
-                       return xmemdupz(buf, cp - buf);
-       }
-       return "";
-}
-
-static const char *copy_email(const char *buf)
-{
-       const char *email = strchr(buf, '<');
-       const char *eoemail;
-       if (!email)
-               return "";
-       eoemail = strchr(email, '>');
-       if (!eoemail)
-               return "";
-       return xmemdupz(email, eoemail + 1 - email);
-}
-
-static char *copy_subject(const char *buf, unsigned long len)
-{
-       char *r = xmemdupz(buf, len);
-       int i;
-
-       for (i = 0; i < len; i++)
-               if (r[i] == '\n')
-                       r[i] = ' ';
-
-       return r;
-}
-
-static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
-{
-       const char *eoemail = strstr(buf, "> ");
-       char *zone;
-       unsigned long timestamp;
-       long tz;
-       enum date_mode date_mode = DATE_NORMAL;
-       const char *formatp;
-
-       /*
-        * We got here because atomname ends in "date" or "date<something>";
-        * it's not possible that <something> is not ":<format>" because
-        * parse_atom() wouldn't have allowed it, so we can assume that no
-        * ":" means no format is specified, and use the default.
-        */
-       formatp = strchr(atomname, ':');
-       if (formatp != NULL) {
-               formatp++;
-               date_mode = parse_date_format(formatp);
-       }
-
-       if (!eoemail)
-               goto bad;
-       timestamp = strtoul(eoemail + 2, &zone, 10);
-       if (timestamp == ULONG_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;
-       return;
- bad:
-       v->s = "";
-       v->ul = 0;
-}
-
-/* See grab_values */
-static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-       int i;
-       int wholen = strlen(who);
-       const char *wholine = NULL;
-
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &val[i];
-               if (!!deref != (*name == '*'))
-                       continue;
-               if (deref)
-                       name++;
-               if (strncmp(who, name, wholen))
-                       continue;
-               if (name[wholen] != 0 &&
-                   strcmp(name + wholen, "name") &&
-                   strcmp(name + wholen, "email") &&
-                   !starts_with(name + wholen, "date"))
-                       continue;
-               if (!wholine)
-                       wholine = find_wholine(who, wholen, buf, sz);
-               if (!wholine)
-                       return; /* no point looking for it */
-               if (name[wholen] == 0)
-                       v->s = copy_line(wholine);
-               else if (!strcmp(name + wholen, "name"))
-                       v->s = copy_name(wholine);
-               else if (!strcmp(name + wholen, "email"))
-                       v->s = copy_email(wholine);
-               else if (starts_with(name + wholen, "date"))
-                       grab_date(wholine, v, name);
-       }
-
-       /*
-        * For a tag or a commit object, if "creator" or "creatordate" is
-        * requested, do something special.
-        */
-       if (strcmp(who, "tagger") && strcmp(who, "committer"))
-               return; /* "author" for commit object is not wanted */
-       if (!wholine)
-               wholine = find_wholine(who, wholen, buf, sz);
-       if (!wholine)
-               return;
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &val[i];
-               if (!!deref != (*name == '*'))
-                       continue;
-               if (deref)
-                       name++;
-
-               if (starts_with(name, "creatordate"))
-                       grab_date(wholine, v, name);
-               else if (!strcmp(name, "creator"))
-                       v->s = copy_line(wholine);
-       }
-}
-
-static void find_subpos(const char *buf, unsigned long sz,
-                       const char **sub, unsigned long *sublen,
-                       const char **body, unsigned long *bodylen,
-                       unsigned long *nonsiglen,
-                       const char **sig, unsigned long *siglen)
-{
-       const char *eol;
-       /* skip past header until we hit empty line */
-       while (*buf && *buf != '\n') {
-               eol = strchrnul(buf, '\n');
-               if (*eol)
-                       eol++;
-               buf = eol;
-       }
-       /* skip any empty lines */
-       while (*buf == '\n')
-               buf++;
-
-       /* parse signature first; we might not even have a subject line */
-       *sig = buf + parse_signature(buf, strlen(buf));
-       *siglen = strlen(*sig);
-
-       /* subject is first non-empty line */
-       *sub = buf;
-       /* subject goes to first empty line */
-       while (buf < *sig && *buf && *buf != '\n') {
-               eol = strchrnul(buf, '\n');
-               if (*eol)
-                       eol++;
-               buf = eol;
-       }
-       *sublen = buf - *sub;
-       /* drop trailing newline, if present */
-       if (*sublen && (*sub)[*sublen - 1] == '\n')
-               *sublen -= 1;
-
-       /* skip any empty lines */
-       while (*buf == '\n')
-               buf++;
-       *body = buf;
-       *bodylen = strlen(buf);
-       *nonsiglen = *sig - buf;
-}
-
-/* See grab_values */
-static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-       int i;
-       const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
-       unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
-
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &val[i];
-               if (!!deref != (*name == '*'))
-                       continue;
-               if (deref)
-                       name++;
-               if (strcmp(name, "subject") &&
-                   strcmp(name, "body") &&
-                   strcmp(name, "contents") &&
-                   strcmp(name, "contents:subject") &&
-                   strcmp(name, "contents:body") &&
-                   strcmp(name, "contents:signature"))
-                       continue;
-               if (!subpos)
-                       find_subpos(buf, sz,
-                                   &subpos, &sublen,
-                                   &bodypos, &bodylen, &nonsiglen,
-                                   &sigpos, &siglen);
-
-               if (!strcmp(name, "subject"))
-                       v->s = copy_subject(subpos, sublen);
-               else if (!strcmp(name, "contents:subject"))
-                       v->s = copy_subject(subpos, sublen);
-               else if (!strcmp(name, "body"))
-                       v->s = xmemdupz(bodypos, bodylen);
-               else if (!strcmp(name, "contents:body"))
-                       v->s = xmemdupz(bodypos, nonsiglen);
-               else if (!strcmp(name, "contents:signature"))
-                       v->s = xmemdupz(sigpos, siglen);
-               else if (!strcmp(name, "contents"))
-                       v->s = xstrdup(subpos);
-       }
-}
-
-/*
- * We want to have empty print-string for field requests
- * that do not apply (e.g. "authordate" for a tag object)
- */
-static void fill_missing_values(struct atom_value *val)
-{
-       int i;
-       for (i = 0; i < used_atom_cnt; i++) {
-               struct atom_value *v = &val[i];
-               if (v->s == NULL)
-                       v->s = "";
-       }
-}
-
-/*
- * val is a list of atom_value to hold returned values.  Extract
- * the values for atoms in used_atom array out of (obj, buf, sz).
- * when deref is false, (obj, buf, sz) is the object that is
- * pointed at by the ref itself; otherwise it is the object the
- * ref (which is a tag) refers to.
- */
-static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
-{
-       grab_common_values(val, deref, obj, buf, sz);
-       switch (obj->type) {
-       case OBJ_TAG:
-               grab_tag_values(val, deref, obj, buf, sz);
-               grab_sub_body_contents(val, deref, obj, buf, sz);
-               grab_person("tagger", val, deref, obj, buf, sz);
-               break;
-       case OBJ_COMMIT:
-               grab_commit_values(val, deref, obj, buf, sz);
-               grab_sub_body_contents(val, deref, obj, buf, sz);
-               grab_person("author", val, deref, obj, buf, sz);
-               grab_person("committer", val, deref, obj, buf, sz);
-               break;
-       case OBJ_TREE:
-               /* grab_tree_values(val, deref, obj, buf, sz); */
-               break;
-       case OBJ_BLOB:
-               /* grab_blob_values(val, deref, obj, buf, sz); */
-               break;
-       default:
-               die("Eh?  Object of type %d?", obj->type);
-       }
-}
-
-static inline char *copy_advance(char *dst, const char *src)
-{
-       while (*src)
-               *dst++ = *src++;
-       return dst;
-}
-
-/*
- * Parse the object referred by ref, and grab needed value.
- */
-static void populate_value(struct refinfo *ref)
-{
-       void *buf;
-       struct object *obj;
-       int eaten, i;
-       unsigned long size;
-       const unsigned char *tagged;
-
-       ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
-
-       if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
-               unsigned char unused1[20];
-               ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
-                                            unused1, NULL);
-               if (!ref->symref)
-                       ref->symref = "";
-       }
-
-       /* Fill in specials first */
-       for (i = 0; i < used_atom_cnt; i++) {
-               const char *name = used_atom[i];
-               struct atom_value *v = &ref->value[i];
-               int deref = 0;
-               const char *refname;
-               const char *formatp;
-               struct branch *branch = NULL;
-
-               if (*name == '*') {
-                       deref = 1;
-                       name++;
-               }
-
-               if (starts_with(name, "refname"))
-                       refname = ref->refname;
-               else if (starts_with(name, "symref"))
-                       refname = ref->symref ? ref->symref : "";
-               else if (starts_with(name, "upstream")) {
-                       const char *branch_name;
-                       /* only local branches may have an upstream */
-                       if (!skip_prefix(ref->refname, "refs/heads/",
-                                        &branch_name))
-                               continue;
-                       branch = branch_get(branch_name);
-
-                       refname = branch_get_upstream(branch, NULL);
-                       if (!refname)
-                               continue;
-               } else if (starts_with(name, "push")) {
-                       const char *branch_name;
-                       if (!skip_prefix(ref->refname, "refs/heads/",
-                                        &branch_name))
-                               continue;
-                       branch = branch_get(branch_name);
-
-                       refname = branch_get_push(branch, NULL);
-                       if (!refname)
-                               continue;
-               } else if (starts_with(name, "color:")) {
-                       char color[COLOR_MAXLEN] = "";
-
-                       if (color_parse(name + 6, color) < 0)
-                               die(_("unable to parse format"));
-                       v->s = xstrdup(color);
-                       continue;
-               } else if (!strcmp(name, "flag")) {
-                       char buf[256], *cp = buf;
-                       if (ref->flag & REF_ISSYMREF)
-                               cp = copy_advance(cp, ",symref");
-                       if (ref->flag & REF_ISPACKED)
-                               cp = copy_advance(cp, ",packed");
-                       if (cp == buf)
-                               v->s = "";
-                       else {
-                               *cp = '\0';
-                               v->s = xstrdup(buf + 1);
-                       }
-                       continue;
-               } else if (!deref && grab_objectname(name, ref->objectname, v)) {
-                       continue;
-               } else if (!strcmp(name, "HEAD")) {
-                       const char *head;
-                       unsigned char sha1[20];
-
-                       head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
-                                                 sha1, NULL);
-                       if (!strcmp(ref->refname, head))
-                               v->s = "*";
-                       else
-                               v->s = " ";
-                       continue;
-               } else
-                       continue;
-
-               formatp = strchr(name, ':');
-               if (formatp) {
-                       int num_ours, num_theirs;
-
-                       formatp++;
-                       if (!strcmp(formatp, "short"))
-                               refname = shorten_unambiguous_ref(refname,
-                                                     warn_ambiguous_refs);
-                       else if (!strcmp(formatp, "track") &&
-                                (starts_with(name, "upstream") ||
-                                 starts_with(name, "push"))) {
-                               char buf[40];
-
-                               if (stat_tracking_info(branch, &num_ours,
-                                                      &num_theirs, NULL))
-                                       continue;
-
-                               if (!num_ours && !num_theirs)
-                                       v->s = "";
-                               else if (!num_ours) {
-                                       sprintf(buf, "[behind %d]", num_theirs);
-                                       v->s = xstrdup(buf);
-                               } else if (!num_theirs) {
-                                       sprintf(buf, "[ahead %d]", num_ours);
-                                       v->s = xstrdup(buf);
-                               } else {
-                                       sprintf(buf, "[ahead %d, behind %d]",
-                                               num_ours, num_theirs);
-                                       v->s = xstrdup(buf);
-                               }
-                               continue;
-                       } else if (!strcmp(formatp, "trackshort") &&
-                                  (starts_with(name, "upstream") ||
-                                   starts_with(name, "push"))) {
-                               assert(branch);
-
-                               if (stat_tracking_info(branch, &num_ours,
-                                                       &num_theirs, NULL))
-                                       continue;
-
-                               if (!num_ours && !num_theirs)
-                                       v->s = "=";
-                               else if (!num_ours)
-                                       v->s = "<";
-                               else if (!num_theirs)
-                                       v->s = ">";
-                               else
-                                       v->s = "<>";
-                               continue;
-                       } else
-                               die("unknown %.*s format %s",
-                                   (int)(formatp - name), name, formatp);
-               }
-
-               if (!deref)
-                       v->s = refname;
-               else {
-                       int len = strlen(refname);
-                       char *s = xmalloc(len + 4);
-                       sprintf(s, "%s^{}", refname);
-                       v->s = s;
-               }
-       }
-
-       for (i = 0; i < used_atom_cnt; i++) {
-               struct atom_value *v = &ref->value[i];
-               if (v->s == NULL)
-                       goto need_obj;
-       }
-       return;
-
- need_obj:
-       buf = get_obj(ref->objectname, &obj, &size, &eaten);
-       if (!buf)
-               die("missing object %s for %s",
-                   sha1_to_hex(ref->objectname), ref->refname);
-       if (!obj)
-               die("parse_object_buffer failed on %s for %s",
-                   sha1_to_hex(ref->objectname), ref->refname);
-
-       grab_values(ref->value, 0, obj, buf, size);
-       if (!eaten)
-               free(buf);
-
-       /*
-        * If there is no atom that wants to know about tagged
-        * object, we are done.
-        */
-       if (!need_tagged || (obj->type != OBJ_TAG))
-               return;
-
-       /*
-        * 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->sha1;
-
-       /*
-        * NEEDSWORK: This derefs tag only once, which
-        * is good to deal with chains of trust, but
-        * is not consistent with what deref_tag() does
-        * which peels the onion to the core.
-        */
-       buf = get_obj(tagged, &obj, &size, &eaten);
-       if (!buf)
-               die("missing object %s for %s",
-                   sha1_to_hex(tagged), ref->refname);
-       if (!obj)
-               die("parse_object_buffer failed on %s for %s",
-                   sha1_to_hex(tagged), ref->refname);
-       grab_values(ref->value, 1, obj, buf, size);
-       if (!eaten)
-               free(buf);
-}
-
-/*
- * Given a ref, return the value for the atom.  This lazily gets value
- * out of the object by calling populate value.
- */
-static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
-{
-       if (!ref->value) {
-               populate_value(ref);
-               fill_missing_values(ref->value);
-       }
-       *v = &ref->value[atom];
-}
-
-struct grab_ref_cbdata {
-       struct refinfo **grab_array;
-       const char **grab_pattern;
-       int grab_cnt;
-};
-
-/*
- * A call-back given to for_each_ref().  Filter refs and keep them for
- * later object processing.
- */
-static int grab_single_ref(const char *refname, const struct object_id *oid,
-                          int flag, void *cb_data)
-{
-       struct grab_ref_cbdata *cb = cb_data;
-       struct refinfo *ref;
-       int cnt;
-
-       if (flag & REF_BAD_NAME) {
-                 warning("ignoring ref with broken name %s", refname);
-                 return 0;
-       }
-
-       if (flag & REF_ISBROKEN) {
-                 warning("ignoring broken ref %s", refname);
-                 return 0;
-       }
-
-       if (*cb->grab_pattern) {
-               const char **pattern;
-               int namelen = strlen(refname);
-               for (pattern = cb->grab_pattern; *pattern; pattern++) {
-                       const char *p = *pattern;
-                       int plen = strlen(p);
-
-                       if ((plen <= namelen) &&
-                           !strncmp(refname, p, plen) &&
-                           (refname[plen] == '\0' ||
-                            refname[plen] == '/' ||
-                            p[plen-1] == '/'))
-                               break;
-                       if (!wildmatch(p, refname, WM_PATHNAME, NULL))
-                               break;
-               }
-               if (!*pattern)
-                       return 0;
-       }
-
-       /*
-        * We do not open the object yet; sort may only need refname
-        * to do its job and the resulting list may yet to be pruned
-        * by maxcount logic.
-        */
-       ref = xcalloc(1, sizeof(*ref));
-       ref->refname = xstrdup(refname);
-       hashcpy(ref->objectname, oid->hash);
-       ref->flag = flag;
-
-       cnt = cb->grab_cnt;
-       REALLOC_ARRAY(cb->grab_array, cnt + 1);
-       cb->grab_array[cnt++] = ref;
-       cb->grab_cnt = cnt;
-       return 0;
-}
-
-static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
-{
-       struct atom_value *va, *vb;
-       int cmp;
-       cmp_type cmp_type = used_atom_type[s->atom];
-
-       get_value(a, s->atom, &va);
-       get_value(b, s->atom, &vb);
-       switch (cmp_type) {
-       case FIELD_STR:
-               cmp = strcmp(va->s, vb->s);
-               break;
-       default:
-               if (va->ul < vb->ul)
-                       cmp = -1;
-               else if (va->ul == vb->ul)
-                       cmp = 0;
-               else
-                       cmp = 1;
-               break;
-       }
-       return (s->reverse) ? -cmp : cmp;
-}
-
-static struct ref_sort *ref_sort;
-static int compare_refs(const void *a_, const void *b_)
-{
-       struct refinfo *a = *((struct refinfo **)a_);
-       struct refinfo *b = *((struct refinfo **)b_);
-       struct ref_sort *s;
-
-       for (s = ref_sort; s; s = s->next) {
-               int cmp = cmp_ref_sort(s, a, b);
-               if (cmp)
-                       return cmp;
-       }
-       return 0;
-}
-
-static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
-{
-       ref_sort = sort;
-       qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
-}
-
-static void print_value(struct atom_value *v, int quote_style)
-{
-       struct strbuf sb = STRBUF_INIT;
-       switch (quote_style) {
-       case QUOTE_NONE:
-               fputs(v->s, stdout);
-               break;
-       case QUOTE_SHELL:
-               sq_quote_buf(&sb, v->s);
-               break;
-       case QUOTE_PERL:
-               perl_quote_buf(&sb, v->s);
-               break;
-       case QUOTE_PYTHON:
-               python_quote_buf(&sb, v->s);
-               break;
-       case QUOTE_TCL:
-               tcl_quote_buf(&sb, v->s);
-               break;
-       }
-       if (quote_style != QUOTE_NONE) {
-               fputs(sb.buf, stdout);
-               strbuf_release(&sb);
-       }
-}
-
-static int hex1(char ch)
-{
-       if ('0' <= ch && ch <= '9')
-               return ch - '0';
-       else if ('a' <= ch && ch <= 'f')
-               return ch - 'a' + 10;
-       else if ('A' <= ch && ch <= 'F')
-               return ch - 'A' + 10;
-       return -1;
-}
-static int hex2(const char *cp)
-{
-       if (cp[0] && cp[1])
-               return (hex1(cp[0]) << 4) | hex1(cp[1]);
-       else
-               return -1;
-}
-
-static void emit(const char *cp, const char *ep)
-{
-       while (*cp && (!ep || cp < ep)) {
-               if (*cp == '%') {
-                       if (cp[1] == '%')
-                               cp++;
-                       else {
-                               int ch = hex2(cp + 1);
-                               if (0 <= ch) {
-                                       putchar(ch);
-                                       cp += 3;
-                                       continue;
-                               }
-                       }
-               }
-               putchar(*cp);
-               cp++;
-       }
-}
-
-static void show_ref(struct refinfo *info, const char *format, int quote_style)
-{
-       const char *cp, *sp, *ep;
-
-       for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
-               struct atom_value *atomv;
-
-               ep = strchr(sp, ')');
-               if (cp < sp)
-                       emit(cp, sp);
-               get_value(info, parse_atom(sp + 2, ep), &atomv);
-               print_value(atomv, quote_style);
-       }
-       if (*cp) {
-               sp = cp + strlen(cp);
-               emit(cp, sp);
-       }
-       if (need_color_reset_at_eol) {
-               struct atom_value resetv;
-               char color[COLOR_MAXLEN] = "";
-
-               if (color_parse("reset", color) < 0)
-                       die("BUG: couldn't parse 'reset' as a color");
-               resetv.s = color;
-               print_value(&resetv, quote_style);
-       }
-       putchar('\n');
-}
-
-static struct ref_sort *default_sort(void)
-{
-       static const char cstr_name[] = "refname";
-
-       struct ref_sort *sort = xcalloc(1, sizeof(*sort));
-
-       sort->next = NULL;
-       sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
-       return sort;
-}
-
-static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
-{
-       struct ref_sort **sort_tail = opt->value;
-       struct ref_sort *s;
-       int len;
-
-       if (!arg) /* should --no-sort void the list ? */
-               return -1;
-
-       s = xcalloc(1, sizeof(*s));
-       s->next = *sort_tail;
-       *sort_tail = s;
-
-       if (*arg == '-') {
-               s->reverse = 1;
-               arg++;
-       }
-       len = strlen(arg);
-       s->atom = parse_atom(arg, arg+len);
-       return 0;
-}
+#include "ref-filter.h"
 
 static char const * const for_each_ref_usage[] = {
        N_("git for-each-ref [<options>] [<pattern>]"),
+       N_("git for-each-ref [--points-at <object>]"),
+       N_("git for-each-ref [(--merged | --no-merged) [<object>]]"),
+       N_("git for-each-ref [--contains [<object>]]"),
        NULL
 };
 
 int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 {
-       int i, num_refs;
+       int i;
        const char *format = "%(objectname) %(objecttype)\t%(refname)";
-       struct ref_sort *sort = NULL, **sort_tail = &sort;
+       struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
        int maxcount = 0, quote_style = 0;
-       struct refinfo **refs;
-       struct grab_ref_cbdata cbdata;
+       struct ref_array array;
+       struct ref_filter filter;
 
        struct option opts[] = {
                OPT_BIT('s', "shell", &quote_style,
@@ -1106,11 +35,20 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
                OPT_GROUP(""),
                OPT_INTEGER( 0 , "count", &maxcount, N_("show only <n> matched refs")),
                OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
-               OPT_CALLBACK(0 , "sort", sort_tail, N_("key"),
-                           N_("field name to sort on"), &opt_parse_sort),
+               OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
+                           N_("field name to sort on"), &parse_opt_ref_sorting),
+               OPT_CALLBACK(0, "points-at", &filter.points_at,
+                            N_("object"), N_("print only refs which points at the given object"),
+                            parse_opt_object_name),
+               OPT_MERGED(&filter, N_("print only refs that are merged")),
+               OPT_NO_MERGED(&filter, N_("print only refs that are not merged")),
+               OPT_CONTAINS(&filter.with_commit, N_("print only refs which contain the commit")),
                OPT_END(),
        };
 
+       memset(&array, 0, sizeof(array));
+       memset(&filter, 0, sizeof(filter));
+
        parse_options(argc, argv, prefix, opts, for_each_ref_usage, 0);
        if (maxcount < 0) {
                error("invalid --count argument: `%d'", maxcount);
@@ -1120,26 +58,24 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
                error("more than one quoting style?");
                usage_with_options(for_each_ref_usage, opts);
        }
-       if (verify_format(format))
+       if (verify_ref_format(format))
                usage_with_options(for_each_ref_usage, opts);
 
-       if (!sort)
-               sort = default_sort();
+       if (!sorting)
+               sorting = ref_default_sorting();
 
        /* for warn_ambiguous_refs */
        git_config(git_default_config, NULL);
 
-       memset(&cbdata, 0, sizeof(cbdata));
-       cbdata.grab_pattern = argv;
-       for_each_rawref(grab_single_ref, &cbdata);
-       refs = cbdata.grab_array;
-       num_refs = cbdata.grab_cnt;
-
-       sort_refs(sort, refs, num_refs);
+       filter.name_patterns = argv;
+       filter.match_as_path = 1;
+       filter_refs(&array, &filter, FILTER_REFS_ALL | FILTER_REFS_INCLUDE_BROKEN);
+       ref_array_sort(sorting, &array);
 
-       if (!maxcount || num_refs < maxcount)
-               maxcount = num_refs;
+       if (!maxcount || array.nr < maxcount)
+               maxcount = array.nr;
        for (i = 0; i < maxcount; i++)
-               show_ref(refs[i], format, quote_style);
+               show_ref_array_item(array.items[i], format, quote_style);
+       ref_array_clear(&array);
        return 0;
 }