--- /dev/null
+ #include "builtin.h"
+ #include "cache.h"
+ #include "parse-options.h"
+ #include "refs.h"
+ #include "wildmatch.h"
+ #include "commit.h"
+ #include "remote.h"
+ #include "color.h"
+ #include "tag.h"
+ #include "quote.h"
+ #include "ref-filter.h"
+
+ typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
+
+ 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. ref_array_item
+ * 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
+ */
+ int parse_ref_filter_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.
+ */
+ int verify_ref_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_ref_filter_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_ref_filter_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 ref_array_item *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_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
+ {
+ if (!ref->value) {
+ populate_value(ref);
+ fill_missing_values(ref->value);
+ }
+ *v = &ref->value[atom];
+ }
+
+ /*
+ * Return 1 if the refname matches one of the patterns, otherwise 0.
+ * A pattern can be path prefix (e.g. a refname "refs/heads/master"
+ * matches a pattern "refs/heads/") or a wildcard (e.g. the same ref
+ * matches "refs/heads/m*",too).
+ */
+ static int match_name_as_path(const char **pattern, const char *refname)
+ {
+ int namelen = strlen(refname);
+ for (; *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] == '/'))
+ return 1;
+ if (!wildmatch(p, refname, WM_PATHNAME, NULL))
+ return 1;
+ }
+ return 0;
+ }
+
+ /* Allocate space for a new ref_array_item and copy the objectname and flag to it */
+ static struct ref_array_item *new_ref_array_item(const char *refname,
+ const unsigned char *objectname,
+ int flag)
+ {
+ size_t len = strlen(refname);
+ struct ref_array_item *ref = xcalloc(1, sizeof(struct ref_array_item) + len + 1);
+ memcpy(ref->refname, refname, len);
+ ref->refname[len] = '\0';
+ hashcpy(ref->objectname, objectname);
+ ref->flag = flag;
+
+ return ref;
+ }
+
+ /*
+ * A call-back given to for_each_ref(). Filter refs and keep them for
+ * later object processing.
+ */
+ static int ref_filter_handler(const char *refname, const struct object_id *oid, int flag, void *cb_data)
+ {
+ struct ref_filter_cbdata *ref_cbdata = cb_data;
+ struct ref_filter *filter = ref_cbdata->filter;
+ struct ref_array_item *ref;
+
+ 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 (*filter->name_patterns && !match_name_as_path(filter->name_patterns, refname))
+ 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 = new_ref_array_item(refname, oid->hash, flag);
+
+ REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr + 1);
+ ref_cbdata->array->items[ref_cbdata->array->nr++] = ref;
+ return 0;
+ }
+
+ /* Free memory allocated for a ref_array_item */
+ static void free_array_item(struct ref_array_item *item)
+ {
+ free((char *)item->symref);
+ free(item);
+ }
+
+ /* Free all memory allocated for ref_array */
+ void ref_array_clear(struct ref_array *array)
+ {
+ int i;
+
+ for (i = 0; i < array->nr; i++)
+ free_array_item(array->items[i]);
+ free(array->items);
+ array->items = NULL;
+ array->nr = array->alloc = 0;
+ }
+
+ /*
+ * API for filtering a set of refs. Based on the type of refs the user
+ * has requested, we iterate through those refs and apply filters
+ * as per the given ref_filter structure and finally store the
+ * filtered refs in the ref_array structure.
+ */
+ int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int type)
+ {
+ struct ref_filter_cbdata ref_cbdata;
+
+ ref_cbdata.array = array;
+ ref_cbdata.filter = filter;
+
+ if (type & (FILTER_REFS_ALL | FILTER_REFS_INCLUDE_BROKEN))
+ return for_each_rawref(ref_filter_handler, &ref_cbdata);
+ else if (type & FILTER_REFS_ALL)
+ return for_each_ref(ref_filter_handler, &ref_cbdata);
+ else
+ die("filter_refs: invalid type");
+ return 0;
+ }
+
+ static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
+ {
+ struct atom_value *va, *vb;
+ int cmp;
+ cmp_type cmp_type = used_atom_type[s->atom];
+
+ get_ref_atom_value(a, s->atom, &va);
+ get_ref_atom_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_sorting *ref_sorting;
+ static int compare_refs(const void *a_, const void *b_)
+ {
+ struct ref_array_item *a = *((struct ref_array_item **)a_);
+ struct ref_array_item *b = *((struct ref_array_item **)b_);
+ struct ref_sorting *s;
+
+ for (s = ref_sorting; s; s = s->next) {
+ int cmp = cmp_ref_sorting(s, a, b);
+ if (cmp)
+ return cmp;
+ }
+ return 0;
+ }
+
+ void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
+ {
+ ref_sorting = sorting;
+ qsort(array->items, array->nr, sizeof(struct ref_array_item *), 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++;
+ }
+ }
+
+ void show_ref_array_item(struct ref_array_item *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_ref_atom_value(info, parse_ref_filter_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');
+ }
+
+ /* If no sorting option is given, use refname to sort as default */
+ struct ref_sorting *ref_default_sorting(void)
+ {
+ static const char cstr_name[] = "refname";
+
+ struct ref_sorting *sorting = xcalloc(1, sizeof(*sorting));
+
+ sorting->next = NULL;
+ sorting->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
+ return sorting;
+ }
+
+ int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
+ {
+ struct ref_sorting **sorting_tail = opt->value;
+ struct ref_sorting *s;
+ int len;
+
+ if (!arg) /* should --no-sort void the list ? */
+ return -1;
+
+ s = xcalloc(1, sizeof(*s));
+ s->next = *sorting_tail;
+ *sorting_tail = s;
+
+ if (*arg == '-') {
+ s->reverse = 1;
+ arg++;
+ }
+ len = strlen(arg);
+ s->atom = parse_ref_filter_atom(arg, arg+len);
+ return 0;
+ }
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