15 #define QUOTE_PYTHON 3
17 typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
21 unsigned long ul; /* used for sorting when not FIELD_STR */
25 struct ref_sort *next;
26 int atom; /* index into used_atom array */
32 unsigned char objectname[20];
33 struct atom_value *value;
42 { "objectsize", FIELD_ULONG },
45 { "parent" }, /* NEEDSWORK: how to address 2nd and later parents? */
46 { "numparent", FIELD_ULONG },
53 { "authordate", FIELD_TIME },
57 { "committerdate", FIELD_TIME },
61 { "taggerdate", FIELD_TIME },
68 * An atom is a valid field atom listed above, possibly prefixed with
69 * a "*" to denote deref_tag().
71 * We parse given format string and sort specifiers, and make a list
72 * of properties that we need to extract out of objects. refinfo
73 * structure will hold an array of values extracted that can be
74 * indexed with the "atom number", which is an index into this
77 static const char **used_atom;
78 static cmp_type *used_atom_type;
79 static int used_atom_cnt, sort_atom_limit, need_tagged;
82 * Used to parse format string and sort specifiers
84 static int parse_atom(const char *atom, const char *ep)
91 if (*sp == '*' && sp < ep)
94 die("malformed field name: %.*s", (int)(ep-atom), atom);
96 /* Do we have the atom already used elsewhere? */
97 for (i = 0; i < used_atom_cnt; i++) {
98 int len = strlen(used_atom[i]);
99 if (len == ep - atom && !memcmp(used_atom[i], atom, len))
103 /* Is the atom a valid one? */
104 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
105 int len = strlen(valid_atom[i].name);
106 if (len == ep - sp && !memcmp(valid_atom[i].name, sp, len))
110 if (ARRAY_SIZE(valid_atom) <= i)
111 die("unknown field name: %.*s", (int)(ep-atom), atom);
113 /* Add it in, including the deref prefix */
116 used_atom = xrealloc(used_atom,
117 (sizeof *used_atom) * used_atom_cnt);
118 used_atom_type = xrealloc(used_atom_type,
119 (sizeof(*used_atom_type) * used_atom_cnt));
120 n = xmalloc(ep - atom + 1);
121 memcpy(n, atom, ep - atom);
124 used_atom_type[at] = valid_atom[i].cmp_type;
129 * In a format string, find the next occurrence of %(atom).
131 static const char *find_next(const char *cp)
135 /* %( is the start of an atom;
136 * %% is a quoteed per-cent.
140 else if (cp[1] == '%')
141 cp++; /* skip over two % */
142 /* otherwise this is a singleton, literal % */
150 * Make sure the format string is well formed, and parse out
153 static void verify_format(const char *format)
156 for (cp = format; *cp && (sp = find_next(cp)); ) {
157 const char *ep = strchr(sp, ')');
159 die("malformatted format string %s", sp);
160 /* sp points at "%(" and ep points at the closing ")" */
161 parse_atom(sp + 2, ep);
167 * Given an object name, read the object data and size, and return a
168 * "struct object". If the object data we are returning is also borrowed
169 * by the "struct object" representation, set *eaten as well---it is a
170 * signal from parse_object_buffer to us not to free the buffer.
172 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
175 void *buf = read_sha1_file(sha1, type, sz);
178 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
184 /* See grab_values */
185 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
189 for (i = 0; i < used_atom_cnt; i++) {
190 const char *name = used_atom[i];
191 struct atom_value *v = &val[i];
192 if (!!deref != (*name == '*'))
196 if (!strcmp(name, "objecttype"))
197 v->s = type_names[obj->type];
198 else if (!strcmp(name, "objectsize")) {
199 char *s = xmalloc(40);
200 sprintf(s, "%lu", sz);
204 else if (!strcmp(name, "objectname")) {
205 char *s = xmalloc(41);
206 strcpy(s, sha1_to_hex(obj->sha1));
212 /* See grab_values */
213 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
216 struct tag *tag = (struct tag *) obj;
218 for (i = 0; i < used_atom_cnt; i++) {
219 const char *name = used_atom[i];
220 struct atom_value *v = &val[i];
221 if (!!deref != (*name == '*'))
225 if (!strcmp(name, "tag"))
230 static int num_parents(struct commit *commit)
232 struct commit_list *parents;
235 for (i = 0, parents = commit->parents;
237 parents = parents->next)
242 /* See grab_values */
243 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
246 struct commit *commit = (struct commit *) obj;
248 for (i = 0; i < used_atom_cnt; i++) {
249 const char *name = used_atom[i];
250 struct atom_value *v = &val[i];
251 if (!!deref != (*name == '*'))
255 if (!strcmp(name, "tree")) {
256 char *s = xmalloc(41);
257 strcpy(s, sha1_to_hex(commit->tree->object.sha1));
260 if (!strcmp(name, "numparent")) {
261 char *s = xmalloc(40);
262 sprintf(s, "%lu", v->ul);
264 v->ul = num_parents(commit);
266 else if (!strcmp(name, "parent")) {
267 int num = num_parents(commit);
269 struct commit_list *parents;
270 char *s = xmalloc(42 * num);
272 for (i = 0, parents = commit->parents;
274 parents = parents->next, i = i + 42) {
275 struct commit *parent = parents->item;
276 strcpy(s+i, sha1_to_hex(parent->object.sha1));
284 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
288 if (!strncmp(buf, who, wholen) &&
290 return buf + wholen + 1;
291 eol = strchr(buf, '\n');
296 return ""; /* end of header */
302 static char *copy_line(const char *buf)
304 const char *eol = strchr(buf, '\n');
310 line = xmalloc(len + 1);
311 memcpy(line, buf, len);
316 static char *copy_name(const char *buf)
318 const char *eol = strchr(buf, '\n');
319 const char *eoname = strstr(buf, " <");
322 if (!(eoname && eol && eoname < eol))
325 line = xmalloc(len + 1);
326 memcpy(line, buf, len);
331 static char *copy_email(const char *buf)
333 const char *email = strchr(buf, '<');
334 const char *eoemail = strchr(email, '>');
337 if (!email || !eoemail)
340 len = eoemail - email;
341 line = xmalloc(len + 1);
342 memcpy(line, email, len);
347 static void grab_date(const char *buf, struct atom_value *v)
349 const char *eoemail = strstr(buf, "> ");
351 unsigned long timestamp;
356 timestamp = strtoul(eoemail + 2, &zone, 10);
357 if (timestamp == ULONG_MAX)
359 tz = strtol(zone, NULL, 10);
360 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
362 v->s = xstrdup(show_date(timestamp, tz, 0));
370 /* See grab_values */
371 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
374 int wholen = strlen(who);
375 const char *wholine = NULL;
377 for (i = 0; i < used_atom_cnt; i++) {
378 const char *name = used_atom[i];
379 struct atom_value *v = &val[i];
380 if (!!deref != (*name == '*'))
384 if (strncmp(who, name, wholen))
386 if (name[wholen] != 0 &&
387 strcmp(name + wholen, "name") &&
388 strcmp(name + wholen, "email") &&
389 strcmp(name + wholen, "date"))
392 wholine = find_wholine(who, wholen, buf, sz);
394 return; /* no point looking for it */
395 if (name[wholen] == 0)
396 v->s = copy_line(wholine);
397 else if (!strcmp(name + wholen, "name"))
398 v->s = copy_name(wholine);
399 else if (!strcmp(name + wholen, "email"))
400 v->s = copy_email(wholine);
401 else if (!strcmp(name + wholen, "date"))
402 grab_date(wholine, v);
406 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
409 const char *eol = strchr(buf, '\n');
412 if (eol[1] == '\n') {
414 break; /* found end of header */
422 *sub = buf; /* first non-empty line */
423 buf = strchr(buf, '\n');
425 return; /* no body */
427 buf++; /* skip blank between subject and body */
431 /* See grab_values */
432 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
435 const char *subpos = NULL, *bodypos = NULL;
437 for (i = 0; i < used_atom_cnt; i++) {
438 const char *name = used_atom[i];
439 struct atom_value *v = &val[i];
440 if (!!deref != (*name == '*'))
444 if (strcmp(name, "subject") &&
445 strcmp(name, "body") &&
446 strcmp(name, "contents"))
449 find_subpos(buf, sz, &subpos, &bodypos);
453 if (!strcmp(name, "subject"))
454 v->s = copy_line(subpos);
455 else if (!strcmp(name, "body"))
457 else if (!strcmp(name, "contents"))
462 /* We want to have empty print-string for field requests
463 * that do not apply (e.g. "authordate" for a tag object)
465 static void fill_missing_values(struct atom_value *val)
468 for (i = 0; i < used_atom_cnt; i++) {
469 struct atom_value *v = &val[i];
476 * val is a list of atom_value to hold returned values. Extract
477 * the values for atoms in used_atom array out of (obj, buf, sz).
478 * when deref is false, (obj, buf, sz) is the object that is
479 * pointed at by the ref itself; otherwise it is the object the
480 * ref (which is a tag) refers to.
482 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
484 grab_common_values(val, deref, obj, buf, sz);
487 grab_tag_values(val, deref, obj, buf, sz);
488 grab_sub_body_contents(val, deref, obj, buf, sz);
489 grab_person("tagger", val, deref, obj, buf, sz);
492 grab_commit_values(val, deref, obj, buf, sz);
493 grab_sub_body_contents(val, deref, obj, buf, sz);
494 grab_person("author", val, deref, obj, buf, sz);
495 grab_person("committer", val, deref, obj, buf, sz);
498 // grab_tree_values(val, deref, obj, buf, sz);
501 // grab_blob_values(val, deref, obj, buf, sz);
504 die("Eh? Object of type %d?", obj->type);
509 * Parse the object referred by ref, and grab needed value.
511 static void populate_value(struct refinfo *ref)
517 const unsigned char *tagged;
519 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
521 buf = get_obj(ref->objectname, &obj, &size, &eaten);
523 die("missing object %s for %s",
524 sha1_to_hex(ref->objectname), ref->refname);
526 die("parse_object_buffer failed on %s for %s",
527 sha1_to_hex(ref->objectname), ref->refname);
529 /* Fill in specials first */
530 for (i = 0; i < used_atom_cnt; i++) {
531 const char *name = used_atom[i];
532 struct atom_value *v = &ref->value[i];
533 if (!strcmp(name, "refname"))
535 else if (!strcmp(name, "*refname")) {
536 int len = strlen(ref->refname);
537 char *s = xmalloc(len + 4);
538 sprintf(s, "%s^{}", ref->refname);
543 grab_values(ref->value, 0, obj, buf, size);
547 /* If there is no atom that wants to know about tagged
548 * object, we are done.
550 if (!need_tagged || (obj->type != OBJ_TAG))
553 /* If it is a tag object, see if we use a value that derefs
554 * the object, and if we do grab the object it refers to.
556 tagged = ((struct tag *)obj)->tagged->sha1;
558 /* NEEDSWORK: This derefs tag only once, which
559 * is good to deal with chains of trust, but
560 * is not consistent with what deref_tag() does
561 * which peels the onion to the core.
563 buf = get_obj(tagged, &obj, &size, &eaten);
565 die("missing object %s for %s",
566 sha1_to_hex(tagged), ref->refname);
568 die("parse_object_buffer failed on %s for %s",
569 sha1_to_hex(tagged), ref->refname);
570 grab_values(ref->value, 1, obj, buf, size);
576 * Given a ref, return the value for the atom. This lazily gets value
577 * out of the object by calling populate value.
579 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
583 fill_missing_values(ref->value);
585 *v = &ref->value[atom];
588 struct grab_ref_cbdata {
589 struct refinfo **grab_array;
590 const char **grab_pattern;
595 * A call-back given to for_each_ref(). It is unfortunate that we
596 * need to use global variables to pass extra information to this
599 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
601 struct grab_ref_cbdata *cb = cb_data;
605 if (*cb->grab_pattern) {
606 const char **pattern;
607 int namelen = strlen(refname);
608 for (pattern = cb->grab_pattern; *pattern; pattern++) {
609 const char *p = *pattern;
610 int plen = strlen(p);
612 if ((plen <= namelen) &&
613 !strncmp(refname, p, plen) &&
614 (refname[plen] == '\0' ||
615 refname[plen] == '/'))
617 if (!fnmatch(p, refname, FNM_PATHNAME))
624 /* We do not open the object yet; sort may only need refname
625 * to do its job and the resulting list may yet to be pruned
628 ref = xcalloc(1, sizeof(*ref));
629 ref->refname = xstrdup(refname);
630 hashcpy(ref->objectname, sha1);
633 cb->grab_array = xrealloc(cb->grab_array,
634 sizeof(*cb->grab_array) * (cnt + 1));
635 cb->grab_array[cnt++] = ref;
640 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
642 struct atom_value *va, *vb;
644 cmp_type cmp_type = used_atom_type[s->atom];
646 get_value(a, s->atom, &va);
647 get_value(b, s->atom, &vb);
650 cmp = strcmp(va->s, vb->s);
655 else if (va->ul == vb->ul)
661 return (s->reverse) ? -cmp : cmp;
664 static struct ref_sort *ref_sort;
665 static int compare_refs(const void *a_, const void *b_)
667 struct refinfo *a = *((struct refinfo **)a_);
668 struct refinfo *b = *((struct refinfo **)b_);
671 for (s = ref_sort; s; s = s->next) {
672 int cmp = cmp_ref_sort(s, a, b);
679 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
682 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
685 static void print_value(struct refinfo *ref, int atom, int quote_style)
687 struct atom_value *v;
688 get_value(ref, atom, &v);
689 switch (quote_style) {
694 sq_quote_print(stdout, v->s);
697 perl_quote_print(stdout, v->s);
700 python_quote_print(stdout, v->s);
705 static int hex1(char ch)
707 if ('0' <= ch && ch <= '9')
709 else if ('a' <= ch && ch <= 'f')
710 return ch - 'a' + 10;
711 else if ('A' <= ch && ch <= 'F')
712 return ch - 'A' + 10;
715 static int hex2(const char *cp)
718 return (hex1(cp[0]) << 4) | hex1(cp[1]);
723 static void emit(const char *cp, const char *ep)
725 while (*cp && (!ep || cp < ep)) {
730 int ch = hex2(cp + 1);
743 static void show_ref(struct refinfo *info, const char *format, int quote_style)
745 const char *cp, *sp, *ep;
747 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
748 ep = strchr(sp, ')');
751 print_value(info, parse_atom(sp + 2, ep), quote_style);
754 sp = cp + strlen(cp);
760 static struct ref_sort *default_sort(void)
762 static const char cstr_name[] = "refname";
764 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
767 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
771 int cmd_for_each_ref(int ac, const char **av, char *prefix)
774 const char *format = NULL;
775 struct ref_sort *sort = NULL, **sort_tail = &sort;
777 int quote_style = -1; /* unspecified yet */
778 struct refinfo **refs;
779 struct grab_ref_cbdata cbdata;
781 for (i = 1; i < ac; i++) {
782 const char *arg = av[i];
785 if (!strcmp(arg, "--")) {
789 if (!strncmp(arg, "--format=", 9)) {
791 die("more than one --format?");
795 if (!strcmp(arg, "-s") || !strcmp(arg, "--shell") ) {
796 if (0 <= quote_style)
797 die("more than one quoting style?");
798 quote_style = QUOTE_SHELL;
801 if (!strcmp(arg, "-p") || !strcmp(arg, "--perl") ) {
802 if (0 <= quote_style)
803 die("more than one quoting style?");
804 quote_style = QUOTE_PERL;
807 if (!strcmp(arg, "--python") ) {
808 if (0 <= quote_style)
809 die("more than one quoting style?");
810 quote_style = QUOTE_PYTHON;
813 if (!strncmp(arg, "--count=", 8)) {
815 die("more than one --count?");
816 maxcount = atoi(arg + 8);
818 die("The number %s did not parse", arg);
821 if (!strncmp(arg, "--sort=", 7)) {
822 struct ref_sort *s = xcalloc(1, sizeof(*s));
827 sort_tail = &s->next;
835 sort->atom = parse_atom(arg, arg+len);
841 quote_style = QUOTE_NONE;
844 sort = default_sort();
845 sort_atom_limit = used_atom_cnt;
847 format = "%(objectname) %(objecttype)\t%(refname)";
849 verify_format(format);
851 memset(&cbdata, 0, sizeof(cbdata));
852 cbdata.grab_pattern = av + i;
853 for_each_ref(grab_single_ref, &cbdata);
854 refs = cbdata.grab_array;
855 num_refs = cbdata.grab_cnt;
857 for (i = 0; i < used_atom_cnt; i++) {
858 if (used_atom[i][0] == '*') {
864 sort_refs(sort, refs, num_refs);
866 if (!maxcount || num_refs < maxcount)
868 for (i = 0; i < maxcount; i++)
869 show_ref(refs[i], format, quote_style);