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 },
63 { "creatordate", FIELD_TIME },
70 * An atom is a valid field atom listed above, possibly prefixed with
71 * a "*" to denote deref_tag().
73 * We parse given format string and sort specifiers, and make a list
74 * of properties that we need to extract out of objects. refinfo
75 * structure will hold an array of values extracted that can be
76 * indexed with the "atom number", which is an index into this
79 static const char **used_atom;
80 static cmp_type *used_atom_type;
81 static int used_atom_cnt, sort_atom_limit, need_tagged;
84 * Used to parse format string and sort specifiers
86 static int parse_atom(const char *atom, const char *ep)
93 if (*sp == '*' && sp < ep)
96 die("malformed field name: %.*s", (int)(ep-atom), atom);
98 /* Do we have the atom already used elsewhere? */
99 for (i = 0; i < used_atom_cnt; i++) {
100 int len = strlen(used_atom[i]);
101 if (len == ep - atom && !memcmp(used_atom[i], atom, len))
105 /* Is the atom a valid one? */
106 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
107 int len = strlen(valid_atom[i].name);
108 if (len == ep - sp && !memcmp(valid_atom[i].name, sp, len))
112 if (ARRAY_SIZE(valid_atom) <= i)
113 die("unknown field name: %.*s", (int)(ep-atom), atom);
115 /* Add it in, including the deref prefix */
118 used_atom = xrealloc(used_atom,
119 (sizeof *used_atom) * used_atom_cnt);
120 used_atom_type = xrealloc(used_atom_type,
121 (sizeof(*used_atom_type) * used_atom_cnt));
122 n = xmalloc(ep - atom + 1);
123 memcpy(n, atom, ep - atom);
126 used_atom_type[at] = valid_atom[i].cmp_type;
131 * In a format string, find the next occurrence of %(atom).
133 static const char *find_next(const char *cp)
137 /* %( is the start of an atom;
138 * %% is a quoteed per-cent.
142 else if (cp[1] == '%')
143 cp++; /* skip over two % */
144 /* otherwise this is a singleton, literal % */
152 * Make sure the format string is well formed, and parse out
155 static void verify_format(const char *format)
158 for (cp = format; *cp && (sp = find_next(cp)); ) {
159 const char *ep = strchr(sp, ')');
161 die("malformatted format string %s", sp);
162 /* sp points at "%(" and ep points at the closing ")" */
163 parse_atom(sp + 2, ep);
169 * Given an object name, read the object data and size, and return a
170 * "struct object". If the object data we are returning is also borrowed
171 * by the "struct object" representation, set *eaten as well---it is a
172 * signal from parse_object_buffer to us not to free the buffer.
174 static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
177 void *buf = read_sha1_file(sha1, type, sz);
180 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
186 /* See grab_values */
187 static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
191 for (i = 0; i < used_atom_cnt; i++) {
192 const char *name = used_atom[i];
193 struct atom_value *v = &val[i];
194 if (!!deref != (*name == '*'))
198 if (!strcmp(name, "objecttype"))
199 v->s = type_names[obj->type];
200 else if (!strcmp(name, "objectsize")) {
201 char *s = xmalloc(40);
202 sprintf(s, "%lu", sz);
206 else if (!strcmp(name, "objectname")) {
207 char *s = xmalloc(41);
208 strcpy(s, sha1_to_hex(obj->sha1));
214 /* See grab_values */
215 static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
218 struct tag *tag = (struct tag *) obj;
220 for (i = 0; i < used_atom_cnt; i++) {
221 const char *name = used_atom[i];
222 struct atom_value *v = &val[i];
223 if (!!deref != (*name == '*'))
227 if (!strcmp(name, "tag"))
232 static int num_parents(struct commit *commit)
234 struct commit_list *parents;
237 for (i = 0, parents = commit->parents;
239 parents = parents->next)
244 /* See grab_values */
245 static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
248 struct commit *commit = (struct commit *) obj;
250 for (i = 0; i < used_atom_cnt; i++) {
251 const char *name = used_atom[i];
252 struct atom_value *v = &val[i];
253 if (!!deref != (*name == '*'))
257 if (!strcmp(name, "tree")) {
258 char *s = xmalloc(41);
259 strcpy(s, sha1_to_hex(commit->tree->object.sha1));
262 if (!strcmp(name, "numparent")) {
263 char *s = xmalloc(40);
264 sprintf(s, "%lu", v->ul);
266 v->ul = num_parents(commit);
268 else if (!strcmp(name, "parent")) {
269 int num = num_parents(commit);
271 struct commit_list *parents;
272 char *s = xmalloc(42 * num);
274 for (i = 0, parents = commit->parents;
276 parents = parents->next, i = i + 42) {
277 struct commit *parent = parents->item;
278 strcpy(s+i, sha1_to_hex(parent->object.sha1));
286 static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
290 if (!strncmp(buf, who, wholen) &&
292 return buf + wholen + 1;
293 eol = strchr(buf, '\n');
298 return ""; /* end of header */
304 static char *copy_line(const char *buf)
306 const char *eol = strchr(buf, '\n');
312 line = xmalloc(len + 1);
313 memcpy(line, buf, len);
318 static char *copy_name(const char *buf)
320 const char *eol = strchr(buf, '\n');
321 const char *eoname = strstr(buf, " <");
324 if (!(eoname && eol && eoname < eol))
327 line = xmalloc(len + 1);
328 memcpy(line, buf, len);
333 static char *copy_email(const char *buf)
335 const char *email = strchr(buf, '<');
336 const char *eoemail = strchr(email, '>');
339 if (!email || !eoemail)
342 len = eoemail - email;
343 line = xmalloc(len + 1);
344 memcpy(line, email, len);
349 static void grab_date(const char *buf, struct atom_value *v)
351 const char *eoemail = strstr(buf, "> ");
353 unsigned long timestamp;
358 timestamp = strtoul(eoemail + 2, &zone, 10);
359 if (timestamp == ULONG_MAX)
361 tz = strtol(zone, NULL, 10);
362 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
364 v->s = xstrdup(show_date(timestamp, tz, 0));
372 /* See grab_values */
373 static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
376 int wholen = strlen(who);
377 const char *wholine = NULL;
379 for (i = 0; i < used_atom_cnt; i++) {
380 const char *name = used_atom[i];
381 struct atom_value *v = &val[i];
382 if (!!deref != (*name == '*'))
386 if (strncmp(who, name, wholen))
388 if (name[wholen] != 0 &&
389 strcmp(name + wholen, "name") &&
390 strcmp(name + wholen, "email") &&
391 strcmp(name + wholen, "date"))
394 wholine = find_wholine(who, wholen, buf, sz);
396 return; /* no point looking for it */
397 if (name[wholen] == 0)
398 v->s = copy_line(wholine);
399 else if (!strcmp(name + wholen, "name"))
400 v->s = copy_name(wholine);
401 else if (!strcmp(name + wholen, "email"))
402 v->s = copy_email(wholine);
403 else if (!strcmp(name + wholen, "date"))
404 grab_date(wholine, v);
407 /* For a tag or a commit object, if "creator" or "creatordate" is
408 * requested, do something special.
410 if (strcmp(who, "tagger") && strcmp(who, "committer"))
411 return; /* "author" for commit object is not wanted */
413 wholine = find_wholine(who, wholen, buf, sz);
416 for (i = 0; i < used_atom_cnt; i++) {
417 const char *name = used_atom[i];
418 struct atom_value *v = &val[i];
419 if (!!deref != (*name == '*'))
424 if (!strcmp(name, "creatordate"))
425 grab_date(wholine, v);
426 else if (!strcmp(name, "creator"))
427 v->s = copy_line(wholine);
431 static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
434 const char *eol = strchr(buf, '\n');
437 if (eol[1] == '\n') {
439 break; /* found end of header */
447 *sub = buf; /* first non-empty line */
448 buf = strchr(buf, '\n');
450 return; /* no body */
452 buf++; /* skip blank between subject and body */
456 /* See grab_values */
457 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
460 const char *subpos = NULL, *bodypos = NULL;
462 for (i = 0; i < used_atom_cnt; i++) {
463 const char *name = used_atom[i];
464 struct atom_value *v = &val[i];
465 if (!!deref != (*name == '*'))
469 if (strcmp(name, "subject") &&
470 strcmp(name, "body") &&
471 strcmp(name, "contents"))
474 find_subpos(buf, sz, &subpos, &bodypos);
478 if (!strcmp(name, "subject"))
479 v->s = copy_line(subpos);
480 else if (!strcmp(name, "body"))
481 v->s = xstrdup(bodypos);
482 else if (!strcmp(name, "contents"))
483 v->s = xstrdup(subpos);
487 /* We want to have empty print-string for field requests
488 * that do not apply (e.g. "authordate" for a tag object)
490 static void fill_missing_values(struct atom_value *val)
493 for (i = 0; i < used_atom_cnt; i++) {
494 struct atom_value *v = &val[i];
501 * val is a list of atom_value to hold returned values. Extract
502 * the values for atoms in used_atom array out of (obj, buf, sz).
503 * when deref is false, (obj, buf, sz) is the object that is
504 * pointed at by the ref itself; otherwise it is the object the
505 * ref (which is a tag) refers to.
507 static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
509 grab_common_values(val, deref, obj, buf, sz);
512 grab_tag_values(val, deref, obj, buf, sz);
513 grab_sub_body_contents(val, deref, obj, buf, sz);
514 grab_person("tagger", val, deref, obj, buf, sz);
517 grab_commit_values(val, deref, obj, buf, sz);
518 grab_sub_body_contents(val, deref, obj, buf, sz);
519 grab_person("author", val, deref, obj, buf, sz);
520 grab_person("committer", val, deref, obj, buf, sz);
523 // grab_tree_values(val, deref, obj, buf, sz);
526 // grab_blob_values(val, deref, obj, buf, sz);
529 die("Eh? Object of type %d?", obj->type);
534 * Parse the object referred by ref, and grab needed value.
536 static void populate_value(struct refinfo *ref)
542 const unsigned char *tagged;
544 ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt);
546 buf = get_obj(ref->objectname, &obj, &size, &eaten);
548 die("missing object %s for %s",
549 sha1_to_hex(ref->objectname), ref->refname);
551 die("parse_object_buffer failed on %s for %s",
552 sha1_to_hex(ref->objectname), ref->refname);
554 /* Fill in specials first */
555 for (i = 0; i < used_atom_cnt; i++) {
556 const char *name = used_atom[i];
557 struct atom_value *v = &ref->value[i];
558 if (!strcmp(name, "refname"))
560 else if (!strcmp(name, "*refname")) {
561 int len = strlen(ref->refname);
562 char *s = xmalloc(len + 4);
563 sprintf(s, "%s^{}", ref->refname);
568 grab_values(ref->value, 0, obj, buf, size);
572 /* If there is no atom that wants to know about tagged
573 * object, we are done.
575 if (!need_tagged || (obj->type != OBJ_TAG))
578 /* If it is a tag object, see if we use a value that derefs
579 * the object, and if we do grab the object it refers to.
581 tagged = ((struct tag *)obj)->tagged->sha1;
583 /* NEEDSWORK: This derefs tag only once, which
584 * is good to deal with chains of trust, but
585 * is not consistent with what deref_tag() does
586 * which peels the onion to the core.
588 buf = get_obj(tagged, &obj, &size, &eaten);
590 die("missing object %s for %s",
591 sha1_to_hex(tagged), ref->refname);
593 die("parse_object_buffer failed on %s for %s",
594 sha1_to_hex(tagged), ref->refname);
595 grab_values(ref->value, 1, obj, buf, size);
601 * Given a ref, return the value for the atom. This lazily gets value
602 * out of the object by calling populate value.
604 static void get_value(struct refinfo *ref, int atom, struct atom_value **v)
608 fill_missing_values(ref->value);
610 *v = &ref->value[atom];
613 struct grab_ref_cbdata {
614 struct refinfo **grab_array;
615 const char **grab_pattern;
620 * A call-back given to for_each_ref(). It is unfortunate that we
621 * need to use global variables to pass extra information to this
624 static int grab_single_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
626 struct grab_ref_cbdata *cb = cb_data;
630 if (*cb->grab_pattern) {
631 const char **pattern;
632 int namelen = strlen(refname);
633 for (pattern = cb->grab_pattern; *pattern; pattern++) {
634 const char *p = *pattern;
635 int plen = strlen(p);
637 if ((plen <= namelen) &&
638 !strncmp(refname, p, plen) &&
639 (refname[plen] == '\0' ||
640 refname[plen] == '/'))
642 if (!fnmatch(p, refname, FNM_PATHNAME))
649 /* We do not open the object yet; sort may only need refname
650 * to do its job and the resulting list may yet to be pruned
653 ref = xcalloc(1, sizeof(*ref));
654 ref->refname = xstrdup(refname);
655 hashcpy(ref->objectname, sha1);
658 cb->grab_array = xrealloc(cb->grab_array,
659 sizeof(*cb->grab_array) * (cnt + 1));
660 cb->grab_array[cnt++] = ref;
665 static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b)
667 struct atom_value *va, *vb;
669 cmp_type cmp_type = used_atom_type[s->atom];
671 get_value(a, s->atom, &va);
672 get_value(b, s->atom, &vb);
675 cmp = strcmp(va->s, vb->s);
680 else if (va->ul == vb->ul)
686 return (s->reverse) ? -cmp : cmp;
689 static struct ref_sort *ref_sort;
690 static int compare_refs(const void *a_, const void *b_)
692 struct refinfo *a = *((struct refinfo **)a_);
693 struct refinfo *b = *((struct refinfo **)b_);
696 for (s = ref_sort; s; s = s->next) {
697 int cmp = cmp_ref_sort(s, a, b);
704 static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs)
707 qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs);
710 static void print_value(struct refinfo *ref, int atom, int quote_style)
712 struct atom_value *v;
713 get_value(ref, atom, &v);
714 switch (quote_style) {
719 sq_quote_print(stdout, v->s);
722 perl_quote_print(stdout, v->s);
725 python_quote_print(stdout, v->s);
730 static int hex1(char ch)
732 if ('0' <= ch && ch <= '9')
734 else if ('a' <= ch && ch <= 'f')
735 return ch - 'a' + 10;
736 else if ('A' <= ch && ch <= 'F')
737 return ch - 'A' + 10;
740 static int hex2(const char *cp)
743 return (hex1(cp[0]) << 4) | hex1(cp[1]);
748 static void emit(const char *cp, const char *ep)
750 while (*cp && (!ep || cp < ep)) {
755 int ch = hex2(cp + 1);
768 static void show_ref(struct refinfo *info, const char *format, int quote_style)
770 const char *cp, *sp, *ep;
772 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
773 ep = strchr(sp, ')');
776 print_value(info, parse_atom(sp + 2, ep), quote_style);
779 sp = cp + strlen(cp);
785 static struct ref_sort *default_sort(void)
787 static const char cstr_name[] = "refname";
789 struct ref_sort *sort = xcalloc(1, sizeof(*sort));
792 sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name));
796 int cmd_for_each_ref(int ac, const char **av, char *prefix)
799 const char *format = NULL;
800 struct ref_sort *sort = NULL, **sort_tail = &sort;
802 int quote_style = -1; /* unspecified yet */
803 struct refinfo **refs;
804 struct grab_ref_cbdata cbdata;
806 for (i = 1; i < ac; i++) {
807 const char *arg = av[i];
810 if (!strcmp(arg, "--")) {
814 if (!strncmp(arg, "--format=", 9)) {
816 die("more than one --format?");
820 if (!strcmp(arg, "-s") || !strcmp(arg, "--shell") ) {
821 if (0 <= quote_style)
822 die("more than one quoting style?");
823 quote_style = QUOTE_SHELL;
826 if (!strcmp(arg, "-p") || !strcmp(arg, "--perl") ) {
827 if (0 <= quote_style)
828 die("more than one quoting style?");
829 quote_style = QUOTE_PERL;
832 if (!strcmp(arg, "--python") ) {
833 if (0 <= quote_style)
834 die("more than one quoting style?");
835 quote_style = QUOTE_PYTHON;
838 if (!strncmp(arg, "--count=", 8)) {
840 die("more than one --count?");
841 maxcount = atoi(arg + 8);
843 die("The number %s did not parse", arg);
846 if (!strncmp(arg, "--sort=", 7)) {
847 struct ref_sort *s = xcalloc(1, sizeof(*s));
852 sort_tail = &s->next;
860 sort->atom = parse_atom(arg, arg+len);
866 quote_style = QUOTE_NONE;
869 sort = default_sort();
870 sort_atom_limit = used_atom_cnt;
872 format = "%(objectname) %(objecttype)\t%(refname)";
874 verify_format(format);
876 memset(&cbdata, 0, sizeof(cbdata));
877 cbdata.grab_pattern = av + i;
878 for_each_ref(grab_single_ref, &cbdata);
879 refs = cbdata.grab_array;
880 num_refs = cbdata.grab_cnt;
882 for (i = 0; i < used_atom_cnt; i++) {
883 if (used_atom[i][0] == '*') {
889 sort_refs(sort, refs, num_refs);
891 if (!maxcount || num_refs < maxcount)
893 for (i = 0; i < maxcount; i++)
894 show_ref(refs[i], format, quote_style);