ref-filter: make %(upstream:track) prints "[gone]" for invalid upstreams
[git/git.git] / ref-filter.c
CommitLineData
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1#include "builtin.h"
2#include "cache.h"
3#include "parse-options.h"
4#include "refs.h"
5#include "wildmatch.h"
6#include "commit.h"
7#include "remote.h"
8#include "color.h"
9#include "tag.h"
10#include "quote.h"
11#include "ref-filter.h"
35257aa0 12#include "revision.h"
ce592082 13#include "utf8.h"
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14#include "git-compat-util.h"
15#include "version.h"
b1d31c89 16#include "trailer.h"
d4919bb2 17#include "wt-status.h"
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18
19typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
4f3e3b37 20typedef enum { COMPARE_EQUAL, COMPARE_UNEQUAL, COMPARE_NONE } cmp_status;
c95b7585 21
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22struct align {
23 align_type position;
24 unsigned int width;
25};
26
c58492d4 27struct if_then_else {
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28 cmp_status cmp_status;
29 const char *str;
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30 unsigned int then_atom_seen : 1,
31 else_atom_seen : 1,
32 condition_satisfied : 1;
33};
34
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35/*
36 * An atom is a valid field atom listed below, possibly prefixed with
37 * a "*" to denote deref_tag().
38 *
39 * We parse given format string and sort specifiers, and make a list
40 * of properties that we need to extract out of objects. ref_array_item
41 * structure will hold an array of values extracted that can be
42 * indexed with the "atom number", which is an index into this
43 * array.
44 */
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45static struct used_atom {
46 const char *name;
47 cmp_type type;
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48 union {
49 char color[COLOR_MAXLEN];
5bd881d9 50 struct align align;
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51 enum { RR_NORMAL, RR_SHORTEN, RR_TRACK, RR_TRACKSHORT }
52 remote_ref;
452db397 53 struct {
b1d31c89 54 enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB, C_TRAILERS } option;
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55 unsigned int nlines;
56 } contents;
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57 struct {
58 cmp_status cmp_status;
59 const char *str;
60 } if_then_else;
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61 struct {
62 enum { O_FULL, O_LENGTH, O_SHORT } option;
63 unsigned int length;
64 } objectname;
fd935cc7 65 } u;
b072add7 66} *used_atom;
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67static int used_atom_cnt, need_tagged, need_symref;
68static int need_color_reset_at_eol;
69
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70static void color_atom_parser(struct used_atom *atom, const char *color_value)
71{
72 if (!color_value)
73 die(_("expected format: %%(color:<color>)"));
74 if (color_parse(color_value, atom->u.color) < 0)
75 die(_("unrecognized color: %%(color:%s)"), color_value);
76}
77
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78static void remote_ref_atom_parser(struct used_atom *atom, const char *arg)
79{
80 if (!arg)
81 atom->u.remote_ref = RR_NORMAL;
82 else if (!strcmp(arg, "short"))
83 atom->u.remote_ref = RR_SHORTEN;
84 else if (!strcmp(arg, "track"))
85 atom->u.remote_ref = RR_TRACK;
86 else if (!strcmp(arg, "trackshort"))
87 atom->u.remote_ref = RR_TRACKSHORT;
88 else
89 die(_("unrecognized format: %%(%s)"), atom->name);
90}
91
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92static void body_atom_parser(struct used_atom *atom, const char *arg)
93{
94 if (arg)
1823c619 95 die(_("%%(body) does not take arguments"));
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96 atom->u.contents.option = C_BODY_DEP;
97}
98
99static void subject_atom_parser(struct used_atom *atom, const char *arg)
100{
101 if (arg)
1823c619 102 die(_("%%(subject) does not take arguments"));
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103 atom->u.contents.option = C_SUB;
104}
105
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106static void trailers_atom_parser(struct used_atom *atom, const char *arg)
107{
108 if (arg)
109 die(_("%%(trailers) does not take arguments"));
110 atom->u.contents.option = C_TRAILERS;
111}
112
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113static void contents_atom_parser(struct used_atom *atom, const char *arg)
114{
115 if (!arg)
116 atom->u.contents.option = C_BARE;
117 else if (!strcmp(arg, "body"))
118 atom->u.contents.option = C_BODY;
119 else if (!strcmp(arg, "signature"))
120 atom->u.contents.option = C_SIG;
121 else if (!strcmp(arg, "subject"))
122 atom->u.contents.option = C_SUB;
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123 else if (!strcmp(arg, "trailers"))
124 atom->u.contents.option = C_TRAILERS;
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125 else if (skip_prefix(arg, "lines=", &arg)) {
126 atom->u.contents.option = C_LINES;
127 if (strtoul_ui(arg, 10, &atom->u.contents.nlines))
128 die(_("positive value expected contents:lines=%s"), arg);
129 } else
130 die(_("unrecognized %%(contents) argument: %s"), arg);
131}
132
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133static void objectname_atom_parser(struct used_atom *atom, const char *arg)
134{
135 if (!arg)
42d0eb05 136 atom->u.objectname.option = O_FULL;
fe63c4d1 137 else if (!strcmp(arg, "short"))
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138 atom->u.objectname.option = O_SHORT;
139 else if (skip_prefix(arg, "short=", &arg)) {
140 atom->u.objectname.option = O_LENGTH;
141 if (strtoul_ui(arg, 10, &atom->u.objectname.length) ||
142 atom->u.objectname.length == 0)
143 die(_("positive value expected objectname:short=%s"), arg);
144 if (atom->u.objectname.length < MINIMUM_ABBREV)
145 atom->u.objectname.length = MINIMUM_ABBREV;
146 } else
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147 die(_("unrecognized %%(objectname) argument: %s"), arg);
148}
149
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150static align_type parse_align_position(const char *s)
151{
152 if (!strcmp(s, "right"))
153 return ALIGN_RIGHT;
154 else if (!strcmp(s, "middle"))
155 return ALIGN_MIDDLE;
156 else if (!strcmp(s, "left"))
157 return ALIGN_LEFT;
158 return -1;
159}
160
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161static void align_atom_parser(struct used_atom *atom, const char *arg)
162{
163 struct align *align = &atom->u.align;
164 struct string_list params = STRING_LIST_INIT_DUP;
165 int i;
166 unsigned int width = ~0U;
167
168 if (!arg)
169 die(_("expected format: %%(align:<width>,<position>)"));
170
171 align->position = ALIGN_LEFT;
172
173 string_list_split(&params, arg, ',', -1);
174 for (i = 0; i < params.nr; i++) {
175 const char *s = params.items[i].string;
176 int position;
177
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178 if (skip_prefix(s, "position=", &s)) {
179 position = parse_align_position(s);
180 if (position < 0)
181 die(_("unrecognized position:%s"), s);
182 align->position = position;
183 } else if (skip_prefix(s, "width=", &s)) {
184 if (strtoul_ui(s, 10, &width))
185 die(_("unrecognized width:%s"), s);
186 } else if (!strtoul_ui(s, 10, &width))
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187 ;
188 else if ((position = parse_align_position(s)) >= 0)
189 align->position = position;
190 else
191 die(_("unrecognized %%(align) argument: %s"), s);
192 }
193
194 if (width == ~0U)
195 die(_("positive width expected with the %%(align) atom"));
196 align->width = width;
197 string_list_clear(&params, 0);
198}
199
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200static void if_atom_parser(struct used_atom *atom, const char *arg)
201{
202 if (!arg) {
203 atom->u.if_then_else.cmp_status = COMPARE_NONE;
204 return;
205 } else if (skip_prefix(arg, "equals=", &atom->u.if_then_else.str)) {
206 atom->u.if_then_else.cmp_status = COMPARE_EQUAL;
207 } else if (skip_prefix(arg, "notequals=", &atom->u.if_then_else.str)) {
208 atom->u.if_then_else.cmp_status = COMPARE_UNEQUAL;
209 } else {
210 die(_("unrecognized %%(if) argument: %s"), arg);
211 }
212}
213
214
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215static struct {
216 const char *name;
217 cmp_type cmp_type;
4de707ea 218 void (*parser)(struct used_atom *atom, const char *arg);
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219} valid_atom[] = {
220 { "refname" },
221 { "objecttype" },
222 { "objectsize", FIELD_ULONG },
fe63c4d1 223 { "objectname", FIELD_STR, objectname_atom_parser },
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224 { "tree" },
225 { "parent" },
226 { "numparent", FIELD_ULONG },
227 { "object" },
228 { "type" },
229 { "tag" },
230 { "author" },
231 { "authorname" },
232 { "authoremail" },
233 { "authordate", FIELD_TIME },
234 { "committer" },
235 { "committername" },
236 { "committeremail" },
237 { "committerdate", FIELD_TIME },
238 { "tagger" },
239 { "taggername" },
240 { "taggeremail" },
241 { "taggerdate", FIELD_TIME },
242 { "creator" },
243 { "creatordate", FIELD_TIME },
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244 { "subject", FIELD_STR, subject_atom_parser },
245 { "body", FIELD_STR, body_atom_parser },
b1d31c89 246 { "trailers", FIELD_STR, trailers_atom_parser },
452db397 247 { "contents", FIELD_STR, contents_atom_parser },
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248 { "upstream", FIELD_STR, remote_ref_atom_parser },
249 { "push", FIELD_STR, remote_ref_atom_parser },
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250 { "symref" },
251 { "flag" },
252 { "HEAD" },
fd935cc7 253 { "color", FIELD_STR, color_atom_parser },
5bd881d9 254 { "align", FIELD_STR, align_atom_parser },
ce592082 255 { "end" },
4f3e3b37 256 { "if", FIELD_STR, if_atom_parser },
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257 { "then" },
258 { "else" },
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259};
260
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261#define REF_FORMATTING_STATE_INIT { 0, NULL }
262
263struct ref_formatting_stack {
264 struct ref_formatting_stack *prev;
265 struct strbuf output;
c58492d4 266 void (*at_end)(struct ref_formatting_stack **stack);
ce592082 267 void *at_end_data;
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268};
269
270struct ref_formatting_state {
271 int quote_style;
272 struct ref_formatting_stack *stack;
273};
274
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275struct atom_value {
276 const char *s;
63d89fbc 277 void (*handler)(struct atom_value *atomv, struct ref_formatting_state *state);
3a25761a 278 unsigned long ul; /* used for sorting when not FIELD_STR */
c58fc856 279 struct used_atom *atom;
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280};
281
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282/*
283 * Used to parse format string and sort specifiers
284 */
285int parse_ref_filter_atom(const char *atom, const char *ep)
286{
287 const char *sp;
4de707ea 288 const char *arg;
e94ce139 289 int i, at, atom_len;
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290
291 sp = atom;
292 if (*sp == '*' && sp < ep)
293 sp++; /* deref */
294 if (ep <= sp)
1823c619 295 die(_("malformed field name: %.*s"), (int)(ep-atom), atom);
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296
297 /* Do we have the atom already used elsewhere? */
298 for (i = 0; i < used_atom_cnt; i++) {
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299 int len = strlen(used_atom[i].name);
300 if (len == ep - atom && !memcmp(used_atom[i].name, atom, len))
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301 return i;
302 }
303
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304 /*
305 * If the atom name has a colon, strip it and everything after
306 * it off - it specifies the format for this entry, and
307 * shouldn't be used for checking against the valid_atom
308 * table.
309 */
310 arg = memchr(sp, ':', ep - sp);
311 atom_len = (arg ? arg : ep) - sp;
312
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313 /* Is the atom a valid one? */
314 for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
315 int len = strlen(valid_atom[i].name);
e94ce139 316 if (len == atom_len && !memcmp(valid_atom[i].name, sp, len))
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317 break;
318 }
319
320 if (ARRAY_SIZE(valid_atom) <= i)
1823c619 321 die(_("unknown field name: %.*s"), (int)(ep-atom), atom);
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322
323 /* Add it in, including the deref prefix */
324 at = used_atom_cnt;
325 used_atom_cnt++;
326 REALLOC_ARRAY(used_atom, used_atom_cnt);
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327 used_atom[at].name = xmemdupz(atom, ep - atom);
328 used_atom[at].type = valid_atom[i].cmp_type;
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329 if (arg)
330 arg = used_atom[at].name + (arg - atom) + 1;
fd935cc7 331 memset(&used_atom[at].u, 0, sizeof(used_atom[at].u));
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332 if (valid_atom[i].parser)
333 valid_atom[i].parser(&used_atom[at], arg);
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334 if (*atom == '*')
335 need_tagged = 1;
b072add7 336 if (!strcmp(used_atom[at].name, "symref"))
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337 need_symref = 1;
338 return at;
339}
340
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341static void quote_formatting(struct strbuf *s, const char *str, int quote_style)
342{
343 switch (quote_style) {
344 case QUOTE_NONE:
345 strbuf_addstr(s, str);
346 break;
347 case QUOTE_SHELL:
348 sq_quote_buf(s, str);
349 break;
350 case QUOTE_PERL:
351 perl_quote_buf(s, str);
352 break;
353 case QUOTE_PYTHON:
354 python_quote_buf(s, str);
355 break;
356 case QUOTE_TCL:
357 tcl_quote_buf(s, str);
358 break;
359 }
360}
361
362static void append_atom(struct atom_value *v, struct ref_formatting_state *state)
363{
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364 /*
365 * Quote formatting is only done when the stack has a single
366 * element. Otherwise quote formatting is done on the
367 * element's entire output strbuf when the %(end) atom is
368 * encountered.
369 */
370 if (!state->stack->prev)
371 quote_formatting(&state->stack->output, v->s, state->quote_style);
372 else
373 strbuf_addstr(&state->stack->output, v->s);
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374}
375
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376static void push_stack_element(struct ref_formatting_stack **stack)
377{
378 struct ref_formatting_stack *s = xcalloc(1, sizeof(struct ref_formatting_stack));
379
380 strbuf_init(&s->output, 0);
381 s->prev = *stack;
382 *stack = s;
383}
384
385static void pop_stack_element(struct ref_formatting_stack **stack)
386{
387 struct ref_formatting_stack *current = *stack;
388 struct ref_formatting_stack *prev = current->prev;
389
390 if (prev)
391 strbuf_addbuf(&prev->output, &current->output);
392 strbuf_release(&current->output);
393 free(current);
394 *stack = prev;
395}
396
c58492d4 397static void end_align_handler(struct ref_formatting_stack **stack)
ce592082 398{
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399 struct ref_formatting_stack *cur = *stack;
400 struct align *align = (struct align *)cur->at_end_data;
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401 struct strbuf s = STRBUF_INIT;
402
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403 strbuf_utf8_align(&s, align->position, align->width, cur->output.buf);
404 strbuf_swap(&cur->output, &s);
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405 strbuf_release(&s);
406}
407
408static void align_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
409{
410 struct ref_formatting_stack *new;
411
412 push_stack_element(&state->stack);
413 new = state->stack;
414 new->at_end = end_align_handler;
c58fc856 415 new->at_end_data = &atomv->atom->u.align;
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416}
417
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418static void if_then_else_handler(struct ref_formatting_stack **stack)
419{
420 struct ref_formatting_stack *cur = *stack;
421 struct ref_formatting_stack *prev = cur->prev;
422 struct if_then_else *if_then_else = (struct if_then_else *)cur->at_end_data;
423
424 if (!if_then_else->then_atom_seen)
425 die(_("format: %%(if) atom used without a %%(then) atom"));
426
427 if (if_then_else->else_atom_seen) {
428 /*
429 * There is an %(else) atom: we need to drop one state from the
430 * stack, either the %(else) branch if the condition is satisfied, or
431 * the %(then) branch if it isn't.
432 */
433 if (if_then_else->condition_satisfied) {
434 strbuf_reset(&cur->output);
435 pop_stack_element(&cur);
436 } else {
437 strbuf_swap(&cur->output, &prev->output);
438 strbuf_reset(&cur->output);
439 pop_stack_element(&cur);
440 }
441 } else if (!if_then_else->condition_satisfied) {
442 /*
443 * No %(else) atom: just drop the %(then) branch if the
444 * condition is not satisfied.
445 */
446 strbuf_reset(&cur->output);
447 }
448
449 *stack = cur;
450 free(if_then_else);
451}
452
453static void if_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
454{
455 struct ref_formatting_stack *new;
456 struct if_then_else *if_then_else = xcalloc(sizeof(struct if_then_else), 1);
457
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458 if_then_else->str = atomv->atom->u.if_then_else.str;
459 if_then_else->cmp_status = atomv->atom->u.if_then_else.cmp_status;
460
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461 push_stack_element(&state->stack);
462 new = state->stack;
463 new->at_end = if_then_else_handler;
464 new->at_end_data = if_then_else;
465}
466
467static int is_empty(const char *s)
468{
469 while (*s != '\0') {
470 if (!isspace(*s))
471 return 0;
472 s++;
473 }
474 return 1;
475}
476
477static void then_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
478{
479 struct ref_formatting_stack *cur = state->stack;
480 struct if_then_else *if_then_else = NULL;
481
482 if (cur->at_end == if_then_else_handler)
483 if_then_else = (struct if_then_else *)cur->at_end_data;
484 if (!if_then_else)
485 die(_("format: %%(then) atom used without an %%(if) atom"));
486 if (if_then_else->then_atom_seen)
487 die(_("format: %%(then) atom used more than once"));
488 if (if_then_else->else_atom_seen)
489 die(_("format: %%(then) atom used after %%(else)"));
490 if_then_else->then_atom_seen = 1;
491 /*
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492 * If the 'equals' or 'notequals' attribute is used then
493 * perform the required comparison. If not, only non-empty
494 * strings satisfy the 'if' condition.
c58492d4 495 */
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496 if (if_then_else->cmp_status == COMPARE_EQUAL) {
497 if (!strcmp(if_then_else->str, cur->output.buf))
498 if_then_else->condition_satisfied = 1;
499 } else if (if_then_else->cmp_status == COMPARE_UNEQUAL) {
500 if (strcmp(if_then_else->str, cur->output.buf))
501 if_then_else->condition_satisfied = 1;
502 } else if (cur->output.len && !is_empty(cur->output.buf))
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503 if_then_else->condition_satisfied = 1;
504 strbuf_reset(&cur->output);
505}
506
507static void else_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
508{
509 struct ref_formatting_stack *prev = state->stack;
510 struct if_then_else *if_then_else = NULL;
511
512 if (prev->at_end == if_then_else_handler)
513 if_then_else = (struct if_then_else *)prev->at_end_data;
514 if (!if_then_else)
515 die(_("format: %%(else) atom used without an %%(if) atom"));
516 if (!if_then_else->then_atom_seen)
517 die(_("format: %%(else) atom used without a %%(then) atom"));
518 if (if_then_else->else_atom_seen)
519 die(_("format: %%(else) atom used more than once"));
520 if_then_else->else_atom_seen = 1;
521 push_stack_element(&state->stack);
522 state->stack->at_end_data = prev->at_end_data;
523 state->stack->at_end = prev->at_end;
524}
525
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526static void end_atom_handler(struct atom_value *atomv, struct ref_formatting_state *state)
527{
528 struct ref_formatting_stack *current = state->stack;
529 struct strbuf s = STRBUF_INIT;
530
531 if (!current->at_end)
532 die(_("format: %%(end) atom used without corresponding atom"));
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533 current->at_end(&state->stack);
534
535 /* Stack may have been popped within at_end(), hence reset the current pointer */
536 current = state->stack;
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537
538 /*
539 * Perform quote formatting when the stack element is that of
540 * a supporting atom. If nested then perform quote formatting
541 * only on the topmost supporting atom.
542 */
c58492d4 543 if (!current->prev->prev) {
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544 quote_formatting(&s, current->output.buf, state->quote_style);
545 strbuf_swap(&current->output, &s);
546 }
547 strbuf_release(&s);
548 pop_stack_element(&state->stack);
549}
550
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551/*
552 * In a format string, find the next occurrence of %(atom).
553 */
554static const char *find_next(const char *cp)
555{
556 while (*cp) {
557 if (*cp == '%') {
558 /*
559 * %( is the start of an atom;
560 * %% is a quoted per-cent.
561 */
562 if (cp[1] == '(')
563 return cp;
564 else if (cp[1] == '%')
565 cp++; /* skip over two % */
566 /* otherwise this is a singleton, literal % */
567 }
568 cp++;
569 }
570 return NULL;
571}
572
573/*
574 * Make sure the format string is well formed, and parse out
575 * the used atoms.
576 */
577int verify_ref_format(const char *format)
578{
579 const char *cp, *sp;
580
581 need_color_reset_at_eol = 0;
582 for (cp = format; *cp && (sp = find_next(cp)); ) {
583 const char *color, *ep = strchr(sp, ')');
584 int at;
585
586 if (!ep)
1823c619 587 return error(_("malformed format string %s"), sp);
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588 /* sp points at "%(" and ep points at the closing ")" */
589 at = parse_ref_filter_atom(sp + 2, ep);
590 cp = ep + 1;
591
b072add7 592 if (skip_prefix(used_atom[at].name, "color:", &color))
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593 need_color_reset_at_eol = !!strcmp(color, "reset");
594 }
595 return 0;
596}
597
598/*
599 * Given an object name, read the object data and size, and return a
600 * "struct object". If the object data we are returning is also borrowed
601 * by the "struct object" representation, set *eaten as well---it is a
602 * signal from parse_object_buffer to us not to free the buffer.
603 */
604static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten)
605{
606 enum object_type type;
607 void *buf = read_sha1_file(sha1, &type, sz);
608
609 if (buf)
610 *obj = parse_object_buffer(sha1, type, *sz, buf, eaten);
611 else
612 *obj = NULL;
613 return buf;
614}
615
616static int grab_objectname(const char *name, const unsigned char *sha1,
fe63c4d1 617 struct atom_value *v, struct used_atom *atom)
c95b7585 618{
fe63c4d1 619 if (starts_with(name, "objectname")) {
42d0eb05 620 if (atom->u.objectname.option == O_SHORT) {
fe63c4d1
KN
621 v->s = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
622 return 1;
42d0eb05 623 } else if (atom->u.objectname.option == O_FULL) {
fe63c4d1
KN
624 v->s = xstrdup(sha1_to_hex(sha1));
625 return 1;
42d0eb05
KN
626 } else if (atom->u.objectname.option == O_LENGTH) {
627 v->s = xstrdup(find_unique_abbrev(sha1, atom->u.objectname.length));
628 return 1;
fe63c4d1
KN
629 } else
630 die("BUG: unknown %%(objectname) option");
c95b7585
KN
631 }
632 return 0;
633}
634
635/* See grab_values */
636static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
637{
638 int i;
639
640 for (i = 0; i < used_atom_cnt; i++) {
b072add7 641 const char *name = used_atom[i].name;
c95b7585
KN
642 struct atom_value *v = &val[i];
643 if (!!deref != (*name == '*'))
644 continue;
645 if (deref)
646 name++;
647 if (!strcmp(name, "objecttype"))
648 v->s = typename(obj->type);
649 else if (!strcmp(name, "objectsize")) {
c95b7585 650 v->ul = sz;
a5e03bf5 651 v->s = xstrfmt("%lu", sz);
c95b7585
KN
652 }
653 else if (deref)
fe63c4d1 654 grab_objectname(name, obj->oid.hash, v, &used_atom[i]);
c95b7585
KN
655 }
656}
657
658/* See grab_values */
659static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
660{
661 int i;
662 struct tag *tag = (struct tag *) obj;
663
664 for (i = 0; i < used_atom_cnt; i++) {
b072add7 665 const char *name = used_atom[i].name;
c95b7585
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666 struct atom_value *v = &val[i];
667 if (!!deref != (*name == '*'))
668 continue;
669 if (deref)
670 name++;
671 if (!strcmp(name, "tag"))
672 v->s = tag->tag;
673 else if (!strcmp(name, "type") && tag->tagged)
674 v->s = typename(tag->tagged->type);
a5e03bf5 675 else if (!strcmp(name, "object") && tag->tagged)
f2fd0760 676 v->s = xstrdup(oid_to_hex(&tag->tagged->oid));
c95b7585
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677 }
678}
679
680/* See grab_values */
681static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
682{
683 int i;
684 struct commit *commit = (struct commit *) obj;
685
686 for (i = 0; i < used_atom_cnt; i++) {
b072add7 687 const char *name = used_atom[i].name;
c95b7585
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688 struct atom_value *v = &val[i];
689 if (!!deref != (*name == '*'))
690 continue;
691 if (deref)
692 name++;
693 if (!strcmp(name, "tree")) {
f2fd0760 694 v->s = xstrdup(oid_to_hex(&commit->tree->object.oid));
c95b7585 695 }
a5e03bf5 696 else if (!strcmp(name, "numparent")) {
c95b7585 697 v->ul = commit_list_count(commit->parents);
a5e03bf5 698 v->s = xstrfmt("%lu", v->ul);
c95b7585
KN
699 }
700 else if (!strcmp(name, "parent")) {
c95b7585 701 struct commit_list *parents;
a5e03bf5
JK
702 struct strbuf s = STRBUF_INIT;
703 for (parents = commit->parents; parents; parents = parents->next) {
c95b7585 704 struct commit *parent = parents->item;
a5e03bf5
JK
705 if (parents != commit->parents)
706 strbuf_addch(&s, ' ');
f2fd0760 707 strbuf_addstr(&s, oid_to_hex(&parent->object.oid));
c95b7585 708 }
a5e03bf5 709 v->s = strbuf_detach(&s, NULL);
c95b7585
KN
710 }
711 }
712}
713
714static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz)
715{
716 const char *eol;
717 while (*buf) {
718 if (!strncmp(buf, who, wholen) &&
719 buf[wholen] == ' ')
720 return buf + wholen + 1;
721 eol = strchr(buf, '\n');
722 if (!eol)
723 return "";
724 eol++;
725 if (*eol == '\n')
726 return ""; /* end of header */
727 buf = eol;
728 }
729 return "";
730}
731
732static const char *copy_line(const char *buf)
733{
734 const char *eol = strchrnul(buf, '\n');
735 return xmemdupz(buf, eol - buf);
736}
737
738static const char *copy_name(const char *buf)
739{
740 const char *cp;
741 for (cp = buf; *cp && *cp != '\n'; cp++) {
742 if (!strncmp(cp, " <", 2))
743 return xmemdupz(buf, cp - buf);
744 }
745 return "";
746}
747
748static const char *copy_email(const char *buf)
749{
750 const char *email = strchr(buf, '<');
751 const char *eoemail;
752 if (!email)
753 return "";
754 eoemail = strchr(email, '>');
755 if (!eoemail)
756 return "";
757 return xmemdupz(email, eoemail + 1 - email);
758}
759
760static char *copy_subject(const char *buf, unsigned long len)
761{
762 char *r = xmemdupz(buf, len);
763 int i;
764
765 for (i = 0; i < len; i++)
766 if (r[i] == '\n')
767 r[i] = ' ';
768
769 return r;
770}
771
772static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
773{
774 const char *eoemail = strstr(buf, "> ");
775 char *zone;
776 unsigned long timestamp;
777 long tz;
d939af12 778 struct date_mode date_mode = { DATE_NORMAL };
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KN
779 const char *formatp;
780
781 /*
782 * We got here because atomname ends in "date" or "date<something>";
783 * it's not possible that <something> is not ":<format>" because
784 * parse_ref_filter_atom() wouldn't have allowed it, so we can assume that no
785 * ":" means no format is specified, and use the default.
786 */
787 formatp = strchr(atomname, ':');
788 if (formatp != NULL) {
789 formatp++;
d939af12 790 parse_date_format(formatp, &date_mode);
c95b7585
KN
791 }
792
793 if (!eoemail)
794 goto bad;
795 timestamp = strtoul(eoemail + 2, &zone, 10);
796 if (timestamp == ULONG_MAX)
797 goto bad;
798 tz = strtol(zone, NULL, 10);
799 if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
800 goto bad;
d939af12 801 v->s = xstrdup(show_date(timestamp, tz, &date_mode));
c95b7585
KN
802 v->ul = timestamp;
803 return;
804 bad:
805 v->s = "";
806 v->ul = 0;
807}
808
809/* See grab_values */
810static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
811{
812 int i;
813 int wholen = strlen(who);
814 const char *wholine = NULL;
815
816 for (i = 0; i < used_atom_cnt; i++) {
b072add7 817 const char *name = used_atom[i].name;
c95b7585
KN
818 struct atom_value *v = &val[i];
819 if (!!deref != (*name == '*'))
820 continue;
821 if (deref)
822 name++;
823 if (strncmp(who, name, wholen))
824 continue;
825 if (name[wholen] != 0 &&
826 strcmp(name + wholen, "name") &&
827 strcmp(name + wholen, "email") &&
828 !starts_with(name + wholen, "date"))
829 continue;
830 if (!wholine)
831 wholine = find_wholine(who, wholen, buf, sz);
832 if (!wholine)
833 return; /* no point looking for it */
834 if (name[wholen] == 0)
835 v->s = copy_line(wholine);
836 else if (!strcmp(name + wholen, "name"))
837 v->s = copy_name(wholine);
838 else if (!strcmp(name + wholen, "email"))
839 v->s = copy_email(wholine);
840 else if (starts_with(name + wholen, "date"))
841 grab_date(wholine, v, name);
842 }
843
844 /*
845 * For a tag or a commit object, if "creator" or "creatordate" is
846 * requested, do something special.
847 */
848 if (strcmp(who, "tagger") && strcmp(who, "committer"))
849 return; /* "author" for commit object is not wanted */
850 if (!wholine)
851 wholine = find_wholine(who, wholen, buf, sz);
852 if (!wholine)
853 return;
854 for (i = 0; i < used_atom_cnt; i++) {
b072add7 855 const char *name = used_atom[i].name;
c95b7585
KN
856 struct atom_value *v = &val[i];
857 if (!!deref != (*name == '*'))
858 continue;
859 if (deref)
860 name++;
861
862 if (starts_with(name, "creatordate"))
863 grab_date(wholine, v, name);
864 else if (!strcmp(name, "creator"))
865 v->s = copy_line(wholine);
866 }
867}
868
869static void find_subpos(const char *buf, unsigned long sz,
870 const char **sub, unsigned long *sublen,
871 const char **body, unsigned long *bodylen,
872 unsigned long *nonsiglen,
873 const char **sig, unsigned long *siglen)
874{
875 const char *eol;
876 /* skip past header until we hit empty line */
877 while (*buf && *buf != '\n') {
878 eol = strchrnul(buf, '\n');
879 if (*eol)
880 eol++;
881 buf = eol;
882 }
883 /* skip any empty lines */
884 while (*buf == '\n')
885 buf++;
886
887 /* parse signature first; we might not even have a subject line */
888 *sig = buf + parse_signature(buf, strlen(buf));
889 *siglen = strlen(*sig);
890
891 /* subject is first non-empty line */
892 *sub = buf;
893 /* subject goes to first empty line */
894 while (buf < *sig && *buf && *buf != '\n') {
895 eol = strchrnul(buf, '\n');
896 if (*eol)
897 eol++;
898 buf = eol;
899 }
900 *sublen = buf - *sub;
901 /* drop trailing newline, if present */
902 if (*sublen && (*sub)[*sublen - 1] == '\n')
903 *sublen -= 1;
904
905 /* skip any empty lines */
906 while (*buf == '\n')
907 buf++;
908 *body = buf;
909 *bodylen = strlen(buf);
910 *nonsiglen = *sig - buf;
911}
912
1bb38e5a
KN
913/*
914 * If 'lines' is greater than 0, append that many lines from the given
915 * 'buf' of length 'size' to the given strbuf.
916 */
917static void append_lines(struct strbuf *out, const char *buf, unsigned long size, int lines)
918{
919 int i;
920 const char *sp, *eol;
921 size_t len;
922
923 sp = buf;
924
925 for (i = 0; i < lines && sp < buf + size; i++) {
926 if (i)
927 strbuf_addstr(out, "\n ");
928 eol = memchr(sp, '\n', size - (sp - buf));
929 len = eol ? eol - sp : size - (sp - buf);
930 strbuf_add(out, sp, len);
931 if (!eol)
932 break;
933 sp = eol + 1;
934 }
935}
936
c95b7585
KN
937/* See grab_values */
938static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
939{
940 int i;
941 const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
942 unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
943
944 for (i = 0; i < used_atom_cnt; i++) {
452db397
KN
945 struct used_atom *atom = &used_atom[i];
946 const char *name = atom->name;
c95b7585
KN
947 struct atom_value *v = &val[i];
948 if (!!deref != (*name == '*'))
949 continue;
950 if (deref)
951 name++;
952 if (strcmp(name, "subject") &&
953 strcmp(name, "body") &&
b1d31c89 954 strcmp(name, "trailers") &&
452db397 955 !starts_with(name, "contents"))
c95b7585
KN
956 continue;
957 if (!subpos)
958 find_subpos(buf, sz,
959 &subpos, &sublen,
960 &bodypos, &bodylen, &nonsiglen,
961 &sigpos, &siglen);
962
452db397 963 if (atom->u.contents.option == C_SUB)
c95b7585 964 v->s = copy_subject(subpos, sublen);
452db397 965 else if (atom->u.contents.option == C_BODY_DEP)
c95b7585 966 v->s = xmemdupz(bodypos, bodylen);
452db397 967 else if (atom->u.contents.option == C_BODY)
c95b7585 968 v->s = xmemdupz(bodypos, nonsiglen);
452db397 969 else if (atom->u.contents.option == C_SIG)
c95b7585 970 v->s = xmemdupz(sigpos, siglen);
452db397 971 else if (atom->u.contents.option == C_LINES) {
1bb38e5a
KN
972 struct strbuf s = STRBUF_INIT;
973 const char *contents_end = bodylen + bodypos - siglen;
974
1bb38e5a 975 /* Size is the length of the message after removing the signature */
452db397 976 append_lines(&s, subpos, contents_end - subpos, atom->u.contents.nlines);
1bb38e5a 977 v->s = strbuf_detach(&s, NULL);
b1d31c89
JK
978 } else if (atom->u.contents.option == C_TRAILERS) {
979 struct trailer_info info;
980
981 /* Search for trailer info */
982 trailer_info_get(&info, subpos);
983 v->s = xmemdupz(info.trailer_start,
984 info.trailer_end - info.trailer_start);
985 trailer_info_release(&info);
452db397
KN
986 } else if (atom->u.contents.option == C_BARE)
987 v->s = xstrdup(subpos);
c95b7585
KN
988 }
989}
990
991/*
992 * We want to have empty print-string for field requests
993 * that do not apply (e.g. "authordate" for a tag object)
994 */
995static void fill_missing_values(struct atom_value *val)
996{
997 int i;
998 for (i = 0; i < used_atom_cnt; i++) {
999 struct atom_value *v = &val[i];
1000 if (v->s == NULL)
1001 v->s = "";
1002 }
1003}
1004
1005/*
1006 * val is a list of atom_value to hold returned values. Extract
1007 * the values for atoms in used_atom array out of (obj, buf, sz).
1008 * when deref is false, (obj, buf, sz) is the object that is
1009 * pointed at by the ref itself; otherwise it is the object the
1010 * ref (which is a tag) refers to.
1011 */
1012static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
1013{
1014 grab_common_values(val, deref, obj, buf, sz);
1015 switch (obj->type) {
1016 case OBJ_TAG:
1017 grab_tag_values(val, deref, obj, buf, sz);
1018 grab_sub_body_contents(val, deref, obj, buf, sz);
1019 grab_person("tagger", val, deref, obj, buf, sz);
1020 break;
1021 case OBJ_COMMIT:
1022 grab_commit_values(val, deref, obj, buf, sz);
1023 grab_sub_body_contents(val, deref, obj, buf, sz);
1024 grab_person("author", val, deref, obj, buf, sz);
1025 grab_person("committer", val, deref, obj, buf, sz);
1026 break;
1027 case OBJ_TREE:
1028 /* grab_tree_values(val, deref, obj, buf, sz); */
1029 break;
1030 case OBJ_BLOB:
1031 /* grab_blob_values(val, deref, obj, buf, sz); */
1032 break;
1033 default:
1034 die("Eh? Object of type %d?", obj->type);
1035 }
1036}
1037
1038static inline char *copy_advance(char *dst, const char *src)
1039{
1040 while (*src)
1041 *dst++ = *src++;
1042 return dst;
1043}
1044
0571979b
JK
1045static const char *strip_ref_components(const char *refname, const char *nr_arg)
1046{
1047 char *end;
1048 long nr = strtol(nr_arg, &end, 10);
1049 long remaining = nr;
1050 const char *start = refname;
1051
1052 if (nr < 1 || *end != '\0')
1823c619 1053 die(_(":strip= requires a positive integer argument"));
0571979b
JK
1054
1055 while (remaining) {
1056 switch (*start++) {
1057 case '\0':
1823c619 1058 die(_("ref '%s' does not have %ld components to :strip"),
0571979b
JK
1059 refname, nr);
1060 case '/':
1061 remaining--;
1062 break;
1063 }
1064 }
1065 return start;
1066}
1067
5339bdad
KN
1068static void fill_remote_ref_details(struct used_atom *atom, const char *refname,
1069 struct branch *branch, const char **s)
1070{
1071 int num_ours, num_theirs;
1072 if (atom->u.remote_ref == RR_SHORTEN)
1073 *s = shorten_unambiguous_ref(refname, warn_ambiguous_refs);
1074 else if (atom->u.remote_ref == RR_TRACK) {
1075 if (stat_tracking_info(branch, &num_ours,
ffd921d3
KN
1076 &num_theirs, NULL)) {
1077 *s = "[gone]";
5339bdad 1078 return;
ffd921d3 1079 }
5339bdad
KN
1080
1081 if (!num_ours && !num_theirs)
1082 *s = "";
1083 else if (!num_ours)
1084 *s = xstrfmt("[behind %d]", num_theirs);
1085 else if (!num_theirs)
1086 *s = xstrfmt("[ahead %d]", num_ours);
1087 else
1088 *s = xstrfmt("[ahead %d, behind %d]",
1089 num_ours, num_theirs);
1090 } else if (atom->u.remote_ref == RR_TRACKSHORT) {
1091 if (stat_tracking_info(branch, &num_ours,
1092 &num_theirs, NULL))
1093 return;
1094
1095 if (!num_ours && !num_theirs)
1096 *s = "=";
1097 else if (!num_ours)
1098 *s = "<";
1099 else if (!num_theirs)
1100 *s = ">";
1101 else
1102 *s = "<>";
1103 } else /* RR_NORMAL */
1104 *s = refname;
1105}
1106
d4919bb2
KN
1107char *get_head_description(void)
1108{
1109 struct strbuf desc = STRBUF_INIT;
1110 struct wt_status_state state;
1111 memset(&state, 0, sizeof(state));
1112 wt_status_get_state(&state, 1);
1113 if (state.rebase_in_progress ||
1114 state.rebase_interactive_in_progress)
1115 strbuf_addf(&desc, _("(no branch, rebasing %s)"),
1116 state.branch);
1117 else if (state.bisect_in_progress)
1118 strbuf_addf(&desc, _("(no branch, bisect started on %s)"),
1119 state.branch);
1120 else if (state.detached_from) {
1121 /* TRANSLATORS: make sure these match _("HEAD detached at ")
1122 and _("HEAD detached from ") in wt-status.c */
1123 if (state.detached_at)
1124 strbuf_addf(&desc, _("(HEAD detached at %s)"),
1125 state.detached_from);
1126 else
1127 strbuf_addf(&desc, _("(HEAD detached from %s)"),
1128 state.detached_from);
1129 }
1130 else
1131 strbuf_addstr(&desc, _("(no branch)"));
1132 free(state.branch);
1133 free(state.onto);
1134 free(state.detached_from);
1135 return strbuf_detach(&desc, NULL);
1136}
1137
c95b7585
KN
1138/*
1139 * Parse the object referred by ref, and grab needed value.
1140 */
1141static void populate_value(struct ref_array_item *ref)
1142{
1143 void *buf;
1144 struct object *obj;
1145 int eaten, i;
1146 unsigned long size;
1147 const unsigned char *tagged;
1148
1149 ref->value = xcalloc(used_atom_cnt, sizeof(struct atom_value));
1150
1151 if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
1152 unsigned char unused1[20];
1153 ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
1154 unused1, NULL);
1155 if (!ref->symref)
1156 ref->symref = "";
1157 }
1158
1159 /* Fill in specials first */
1160 for (i = 0; i < used_atom_cnt; i++) {
fd935cc7 1161 struct used_atom *atom = &used_atom[i];
b072add7 1162 const char *name = used_atom[i].name;
c95b7585
KN
1163 struct atom_value *v = &ref->value[i];
1164 int deref = 0;
1165 const char *refname;
1166 const char *formatp;
1167 struct branch *branch = NULL;
1168
63d89fbc 1169 v->handler = append_atom;
c58fc856 1170 v->atom = atom;
63d89fbc 1171
c95b7585
KN
1172 if (*name == '*') {
1173 deref = 1;
1174 name++;
1175 }
1176
d4919bb2 1177 if (starts_with(name, "refname")) {
c95b7585 1178 refname = ref->refname;
d4919bb2
KN
1179 if (ref->kind & FILTER_REFS_DETACHED_HEAD)
1180 refname = get_head_description();
1181 } else if (starts_with(name, "symref"))
c95b7585
KN
1182 refname = ref->symref ? ref->symref : "";
1183 else if (starts_with(name, "upstream")) {
1184 const char *branch_name;
1185 /* only local branches may have an upstream */
1186 if (!skip_prefix(ref->refname, "refs/heads/",
1187 &branch_name))
1188 continue;
1189 branch = branch_get(branch_name);
1190
1191 refname = branch_get_upstream(branch, NULL);
5339bdad
KN
1192 if (refname)
1193 fill_remote_ref_details(atom, refname, branch, &v->s);
1194 continue;
c95b7585
KN
1195 } else if (starts_with(name, "push")) {
1196 const char *branch_name;
1197 if (!skip_prefix(ref->refname, "refs/heads/",
1198 &branch_name))
1199 continue;
1200 branch = branch_get(branch_name);
1201
1202 refname = branch_get_push(branch, NULL);
1203 if (!refname)
1204 continue;
5339bdad
KN
1205 fill_remote_ref_details(atom, refname, branch, &v->s);
1206 continue;
fd935cc7
KN
1207 } else if (starts_with(name, "color:")) {
1208 v->s = atom->u.color;
c95b7585
KN
1209 continue;
1210 } else if (!strcmp(name, "flag")) {
1211 char buf[256], *cp = buf;
1212 if (ref->flag & REF_ISSYMREF)
1213 cp = copy_advance(cp, ",symref");
1214 if (ref->flag & REF_ISPACKED)
1215 cp = copy_advance(cp, ",packed");
1216 if (cp == buf)
1217 v->s = "";
1218 else {
1219 *cp = '\0';
1220 v->s = xstrdup(buf + 1);
1221 }
1222 continue;
fe63c4d1 1223 } else if (!deref && grab_objectname(name, ref->objectname, v, atom)) {
c95b7585
KN
1224 continue;
1225 } else if (!strcmp(name, "HEAD")) {
1226 const char *head;
1227 unsigned char sha1[20];
1228
1229 head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
1230 sha1, NULL);
84679d47 1231 if (head && !strcmp(ref->refname, head))
c95b7585
KN
1232 v->s = "*";
1233 else
1234 v->s = " ";
1235 continue;
5bd881d9 1236 } else if (starts_with(name, "align")) {
ce592082
KN
1237 v->handler = align_atom_handler;
1238 continue;
1239 } else if (!strcmp(name, "end")) {
1240 v->handler = end_atom_handler;
1241 continue;
4f3e3b37
KN
1242 } else if (starts_with(name, "if")) {
1243 const char *s;
1244
1245 if (skip_prefix(name, "if:", &s))
1246 v->s = xstrdup(s);
c58492d4
KN
1247 v->handler = if_atom_handler;
1248 continue;
1249 } else if (!strcmp(name, "then")) {
1250 v->handler = then_atom_handler;
1251 continue;
1252 } else if (!strcmp(name, "else")) {
1253 v->handler = else_atom_handler;
1254 continue;
c95b7585
KN
1255 } else
1256 continue;
1257
1258 formatp = strchr(name, ':');
1259 if (formatp) {
0571979b 1260 const char *arg;
c95b7585
KN
1261
1262 formatp++;
1263 if (!strcmp(formatp, "short"))
1264 refname = shorten_unambiguous_ref(refname,
1265 warn_ambiguous_refs);
0571979b
JK
1266 else if (skip_prefix(formatp, "strip=", &arg))
1267 refname = strip_ref_components(refname, arg);
5339bdad 1268 else
1823c619 1269 die(_("unknown %.*s format %s"),
c95b7585
KN
1270 (int)(formatp - name), name, formatp);
1271 }
1272
1273 if (!deref)
1274 v->s = refname;
a5e03bf5
JK
1275 else
1276 v->s = xstrfmt("%s^{}", refname);
c95b7585
KN
1277 }
1278
1279 for (i = 0; i < used_atom_cnt; i++) {
1280 struct atom_value *v = &ref->value[i];
1281 if (v->s == NULL)
1282 goto need_obj;
1283 }
1284 return;
1285
1286 need_obj:
1287 buf = get_obj(ref->objectname, &obj, &size, &eaten);
1288 if (!buf)
1823c619 1289 die(_("missing object %s for %s"),
c95b7585
KN
1290 sha1_to_hex(ref->objectname), ref->refname);
1291 if (!obj)
1823c619 1292 die(_("parse_object_buffer failed on %s for %s"),
c95b7585
KN
1293 sha1_to_hex(ref->objectname), ref->refname);
1294
1295 grab_values(ref->value, 0, obj, buf, size);
1296 if (!eaten)
1297 free(buf);
1298
1299 /*
1300 * If there is no atom that wants to know about tagged
1301 * object, we are done.
1302 */
1303 if (!need_tagged || (obj->type != OBJ_TAG))
1304 return;
1305
1306 /*
1307 * If it is a tag object, see if we use a value that derefs
1308 * the object, and if we do grab the object it refers to.
1309 */
ed1c9977 1310 tagged = ((struct tag *)obj)->tagged->oid.hash;
c95b7585
KN
1311
1312 /*
1313 * NEEDSWORK: This derefs tag only once, which
1314 * is good to deal with chains of trust, but
1315 * is not consistent with what deref_tag() does
1316 * which peels the onion to the core.
1317 */
1318 buf = get_obj(tagged, &obj, &size, &eaten);
1319 if (!buf)
1823c619 1320 die(_("missing object %s for %s"),
c95b7585
KN
1321 sha1_to_hex(tagged), ref->refname);
1322 if (!obj)
1823c619 1323 die(_("parse_object_buffer failed on %s for %s"),
c95b7585
KN
1324 sha1_to_hex(tagged), ref->refname);
1325 grab_values(ref->value, 1, obj, buf, size);
1326 if (!eaten)
1327 free(buf);
1328}
1329
1330/*
1331 * Given a ref, return the value for the atom. This lazily gets value
1332 * out of the object by calling populate value.
1333 */
1334static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v)
1335{
1336 if (!ref->value) {
1337 populate_value(ref);
1338 fill_missing_values(ref->value);
1339 }
1340 *v = &ref->value[atom];
1341}
1342
ee2bd06b
KN
1343enum contains_result {
1344 CONTAINS_UNKNOWN = -1,
1345 CONTAINS_NO = 0,
1346 CONTAINS_YES = 1
1347};
1348
1349/*
1350 * Mimicking the real stack, this stack lives on the heap, avoiding stack
1351 * overflows.
1352 *
1353 * At each recursion step, the stack items points to the commits whose
1354 * ancestors are to be inspected.
1355 */
1356struct contains_stack {
1357 int nr, alloc;
1358 struct contains_stack_entry {
1359 struct commit *commit;
1360 struct commit_list *parents;
1361 } *contains_stack;
1362};
1363
1364static int in_commit_list(const struct commit_list *want, struct commit *c)
1365{
1366 for (; want; want = want->next)
f2fd0760 1367 if (!oidcmp(&want->item->object.oid, &c->object.oid))
ee2bd06b
KN
1368 return 1;
1369 return 0;
1370}
1371
1372/*
1373 * Test whether the candidate or one of its parents is contained in the list.
1374 * Do not recurse to find out, though, but return -1 if inconclusive.
1375 */
1376static enum contains_result contains_test(struct commit *candidate,
1377 const struct commit_list *want)
1378{
1379 /* was it previously marked as containing a want commit? */
1380 if (candidate->object.flags & TMP_MARK)
1381 return 1;
1382 /* or marked as not possibly containing a want commit? */
1383 if (candidate->object.flags & UNINTERESTING)
1384 return 0;
1385 /* or are we it? */
1386 if (in_commit_list(want, candidate)) {
1387 candidate->object.flags |= TMP_MARK;
1388 return 1;
1389 }
1390
1391 if (parse_commit(candidate) < 0)
1392 return 0;
1393
1394 return -1;
1395}
1396
1397static void push_to_contains_stack(struct commit *candidate, struct contains_stack *contains_stack)
1398{
1399 ALLOC_GROW(contains_stack->contains_stack, contains_stack->nr + 1, contains_stack->alloc);
1400 contains_stack->contains_stack[contains_stack->nr].commit = candidate;
1401 contains_stack->contains_stack[contains_stack->nr++].parents = candidate->parents;
1402}
1403
1404static enum contains_result contains_tag_algo(struct commit *candidate,
1405 const struct commit_list *want)
1406{
1407 struct contains_stack contains_stack = { 0, 0, NULL };
1408 int result = contains_test(candidate, want);
1409
1410 if (result != CONTAINS_UNKNOWN)
1411 return result;
1412
1413 push_to_contains_stack(candidate, &contains_stack);
1414 while (contains_stack.nr) {
1415 struct contains_stack_entry *entry = &contains_stack.contains_stack[contains_stack.nr - 1];
1416 struct commit *commit = entry->commit;
1417 struct commit_list *parents = entry->parents;
1418
1419 if (!parents) {
1420 commit->object.flags |= UNINTERESTING;
1421 contains_stack.nr--;
1422 }
1423 /*
1424 * If we just popped the stack, parents->item has been marked,
1425 * therefore contains_test will return a meaningful 0 or 1.
1426 */
1427 else switch (contains_test(parents->item, want)) {
1428 case CONTAINS_YES:
1429 commit->object.flags |= TMP_MARK;
1430 contains_stack.nr--;
1431 break;
1432 case CONTAINS_NO:
1433 entry->parents = parents->next;
1434 break;
1435 case CONTAINS_UNKNOWN:
1436 push_to_contains_stack(parents->item, &contains_stack);
1437 break;
1438 }
1439 }
1440 free(contains_stack.contains_stack);
1441 return contains_test(candidate, want);
1442}
1443
1444static int commit_contains(struct ref_filter *filter, struct commit *commit)
1445{
1446 if (filter->with_commit_tag_algo)
1447 return contains_tag_algo(commit, filter->with_commit);
1448 return is_descendant_of(commit, filter->with_commit);
1449}
1450
bef0e12b
KN
1451/*
1452 * Return 1 if the refname matches one of the patterns, otherwise 0.
1453 * A pattern can be a literal prefix (e.g. a refname "refs/heads/master"
1454 * matches a pattern "refs/heads/mas") or a wildcard (e.g. the same ref
1455 * matches "refs/heads/mas*", too).
1456 */
3bb16a8b 1457static int match_pattern(const struct ref_filter *filter, const char *refname)
bef0e12b 1458{
3bb16a8b
NTND
1459 const char **patterns = filter->name_patterns;
1460 unsigned flags = 0;
1461
1462 if (filter->ignore_case)
1463 flags |= WM_CASEFOLD;
1464
bef0e12b
KN
1465 /*
1466 * When no '--format' option is given we need to skip the prefix
1467 * for matching refs of tags and branches.
1468 */
1469 (void)(skip_prefix(refname, "refs/tags/", &refname) ||
1470 skip_prefix(refname, "refs/heads/", &refname) ||
1471 skip_prefix(refname, "refs/remotes/", &refname) ||
1472 skip_prefix(refname, "refs/", &refname));
1473
1474 for (; *patterns; patterns++) {
3bb16a8b 1475 if (!wildmatch(*patterns, refname, flags, NULL))
bef0e12b
KN
1476 return 1;
1477 }
1478 return 0;
1479}
1480
c95b7585
KN
1481/*
1482 * Return 1 if the refname matches one of the patterns, otherwise 0.
1483 * A pattern can be path prefix (e.g. a refname "refs/heads/master"
bef0e12b
KN
1484 * matches a pattern "refs/heads/" but not "refs/heads/m") or a
1485 * wildcard (e.g. the same ref matches "refs/heads/m*", too).
c95b7585 1486 */
3bb16a8b 1487static int match_name_as_path(const struct ref_filter *filter, const char *refname)
c95b7585 1488{
3bb16a8b 1489 const char **pattern = filter->name_patterns;
c95b7585 1490 int namelen = strlen(refname);
3bb16a8b
NTND
1491 unsigned flags = WM_PATHNAME;
1492
1493 if (filter->ignore_case)
1494 flags |= WM_CASEFOLD;
1495
c95b7585
KN
1496 for (; *pattern; pattern++) {
1497 const char *p = *pattern;
1498 int plen = strlen(p);
1499
1500 if ((plen <= namelen) &&
1501 !strncmp(refname, p, plen) &&
1502 (refname[plen] == '\0' ||
1503 refname[plen] == '/' ||
1504 p[plen-1] == '/'))
1505 return 1;
1506 if (!wildmatch(p, refname, WM_PATHNAME, NULL))
1507 return 1;
1508 }
1509 return 0;
1510}
1511
bef0e12b
KN
1512/* Return 1 if the refname matches one of the patterns, otherwise 0. */
1513static int filter_pattern_match(struct ref_filter *filter, const char *refname)
1514{
1515 if (!*filter->name_patterns)
1516 return 1; /* No pattern always matches */
1517 if (filter->match_as_path)
3bb16a8b
NTND
1518 return match_name_as_path(filter, refname);
1519 return match_pattern(filter, refname);
bef0e12b
KN
1520}
1521
68411046
KN
1522/*
1523 * Given a ref (sha1, refname), check if the ref belongs to the array
1524 * of sha1s. If the given ref is a tag, check if the given tag points
1525 * at one of the sha1s in the given sha1 array.
1526 * the given sha1_array.
1527 * NEEDSWORK:
1528 * 1. Only a single level of inderection is obtained, we might want to
1529 * change this to account for multiple levels (e.g. annotated tags
1530 * pointing to annotated tags pointing to a commit.)
1531 * 2. As the refs are cached we might know what refname peels to without
1532 * the need to parse the object via parse_object(). peel_ref() might be a
1533 * more efficient alternative to obtain the pointee.
1534 */
1535static const unsigned char *match_points_at(struct sha1_array *points_at,
1536 const unsigned char *sha1,
1537 const char *refname)
1538{
1539 const unsigned char *tagged_sha1 = NULL;
1540 struct object *obj;
1541
1542 if (sha1_array_lookup(points_at, sha1) >= 0)
1543 return sha1;
1544 obj = parse_object(sha1);
1545 if (!obj)
1546 die(_("malformed object at '%s'"), refname);
1547 if (obj->type == OBJ_TAG)
ed1c9977 1548 tagged_sha1 = ((struct tag *)obj)->tagged->oid.hash;
68411046
KN
1549 if (tagged_sha1 && sha1_array_lookup(points_at, tagged_sha1) >= 0)
1550 return tagged_sha1;
1551 return NULL;
1552}
1553
c95b7585
KN
1554/* Allocate space for a new ref_array_item and copy the objectname and flag to it */
1555static struct ref_array_item *new_ref_array_item(const char *refname,
1556 const unsigned char *objectname,
1557 int flag)
1558{
96ffc06f
JK
1559 struct ref_array_item *ref;
1560 FLEX_ALLOC_STR(ref, refname, refname);
c95b7585
KN
1561 hashcpy(ref->objectname, objectname);
1562 ref->flag = flag;
1563
1564 return ref;
1565}
1566
5b4f2851
KN
1567static int filter_ref_kind(struct ref_filter *filter, const char *refname)
1568{
1569 unsigned int i;
1570
1571 static struct {
1572 const char *prefix;
1573 unsigned int kind;
1574 } ref_kind[] = {
1575 { "refs/heads/" , FILTER_REFS_BRANCHES },
1576 { "refs/remotes/" , FILTER_REFS_REMOTES },
1577 { "refs/tags/", FILTER_REFS_TAGS}
1578 };
1579
1580 if (filter->kind == FILTER_REFS_BRANCHES ||
1581 filter->kind == FILTER_REFS_REMOTES ||
1582 filter->kind == FILTER_REFS_TAGS)
1583 return filter->kind;
1584 else if (!strcmp(refname, "HEAD"))
1585 return FILTER_REFS_DETACHED_HEAD;
1586
1587 for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
1588 if (starts_with(refname, ref_kind[i].prefix))
1589 return ref_kind[i].kind;
1590 }
1591
1592 return FILTER_REFS_OTHERS;
1593}
1594
c95b7585
KN
1595/*
1596 * A call-back given to for_each_ref(). Filter refs and keep them for
1597 * later object processing.
1598 */
14de7fba 1599static int ref_filter_handler(const char *refname, const struct object_id *oid, int flag, void *cb_data)
c95b7585
KN
1600{
1601 struct ref_filter_cbdata *ref_cbdata = cb_data;
14de7fba 1602 struct ref_filter *filter = ref_cbdata->filter;
c95b7585 1603 struct ref_array_item *ref;
35257aa0 1604 struct commit *commit = NULL;
5b4f2851 1605 unsigned int kind;
c95b7585
KN
1606
1607 if (flag & REF_BAD_NAME) {
1823c619 1608 warning(_("ignoring ref with broken name %s"), refname);
c95b7585
KN
1609 return 0;
1610 }
1611
7ebc8cbe 1612 if (flag & REF_ISBROKEN) {
1823c619 1613 warning(_("ignoring broken ref %s"), refname);
7ebc8cbe
JH
1614 return 0;
1615 }
1616
5b4f2851
KN
1617 /* Obtain the current ref kind from filter_ref_kind() and ignore unwanted refs. */
1618 kind = filter_ref_kind(filter, refname);
1619 if (!(kind & filter->kind))
1620 return 0;
1621
bef0e12b 1622 if (!filter_pattern_match(filter, refname))
c95b7585
KN
1623 return 0;
1624
68411046
KN
1625 if (filter->points_at.nr && !match_points_at(&filter->points_at, oid->hash, refname))
1626 return 0;
1627
35257aa0
KN
1628 /*
1629 * A merge filter is applied on refs pointing to commits. Hence
1630 * obtain the commit using the 'oid' available and discard all
1631 * non-commits early. The actual filtering is done later.
1632 */
aedcb7dc 1633 if (filter->merge_commit || filter->with_commit || filter->verbose) {
35257aa0
KN
1634 commit = lookup_commit_reference_gently(oid->hash, 1);
1635 if (!commit)
1636 return 0;
ee2bd06b
KN
1637 /* We perform the filtering for the '--contains' option */
1638 if (filter->with_commit &&
1639 !commit_contains(filter, commit))
1640 return 0;
35257aa0
KN
1641 }
1642
c95b7585
KN
1643 /*
1644 * We do not open the object yet; sort may only need refname
1645 * to do its job and the resulting list may yet to be pruned
1646 * by maxcount logic.
1647 */
1648 ref = new_ref_array_item(refname, oid->hash, flag);
35257aa0 1649 ref->commit = commit;
c95b7585 1650
14de7fba
KN
1651 REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr + 1);
1652 ref_cbdata->array->items[ref_cbdata->array->nr++] = ref;
5b4f2851 1653 ref->kind = kind;
c95b7585
KN
1654 return 0;
1655}
1656
1657/* Free memory allocated for a ref_array_item */
1658static void free_array_item(struct ref_array_item *item)
1659{
1660 free((char *)item->symref);
c95b7585
KN
1661 free(item);
1662}
1663
1664/* Free all memory allocated for ref_array */
1665void ref_array_clear(struct ref_array *array)
1666{
1667 int i;
1668
1669 for (i = 0; i < array->nr; i++)
1670 free_array_item(array->items[i]);
1671 free(array->items);
1672 array->items = NULL;
1673 array->nr = array->alloc = 0;
1674}
1675
35257aa0
KN
1676static void do_merge_filter(struct ref_filter_cbdata *ref_cbdata)
1677{
1678 struct rev_info revs;
1679 int i, old_nr;
1680 struct ref_filter *filter = ref_cbdata->filter;
1681 struct ref_array *array = ref_cbdata->array;
1682 struct commit **to_clear = xcalloc(sizeof(struct commit *), array->nr);
1683
1684 init_revisions(&revs, NULL);
1685
1686 for (i = 0; i < array->nr; i++) {
1687 struct ref_array_item *item = array->items[i];
1688 add_pending_object(&revs, &item->commit->object, item->refname);
1689 to_clear[i] = item->commit;
1690 }
1691
1692 filter->merge_commit->object.flags |= UNINTERESTING;
1693 add_pending_object(&revs, &filter->merge_commit->object, "");
1694
1695 revs.limited = 1;
1696 if (prepare_revision_walk(&revs))
1697 die(_("revision walk setup failed"));
1698
1699 old_nr = array->nr;
1700 array->nr = 0;
1701
1702 for (i = 0; i < old_nr; i++) {
1703 struct ref_array_item *item = array->items[i];
1704 struct commit *commit = item->commit;
1705
1706 int is_merged = !!(commit->object.flags & UNINTERESTING);
1707
1708 if (is_merged == (filter->merge == REF_FILTER_MERGED_INCLUDE))
1709 array->items[array->nr++] = array->items[i];
1710 else
1711 free_array_item(item);
1712 }
1713
1714 for (i = 0; i < old_nr; i++)
1715 clear_commit_marks(to_clear[i], ALL_REV_FLAGS);
1716 clear_commit_marks(filter->merge_commit, ALL_REV_FLAGS);
1717 free(to_clear);
1718}
1719
14de7fba
KN
1720/*
1721 * API for filtering a set of refs. Based on the type of refs the user
1722 * has requested, we iterate through those refs and apply filters
1723 * as per the given ref_filter structure and finally store the
1724 * filtered refs in the ref_array structure.
1725 */
1726int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int type)
1727{
1728 struct ref_filter_cbdata ref_cbdata;
35257aa0 1729 int ret = 0;
5b4f2851 1730 unsigned int broken = 0;
14de7fba
KN
1731
1732 ref_cbdata.array = array;
1733 ref_cbdata.filter = filter;
1734
5b4f2851
KN
1735 if (type & FILTER_REFS_INCLUDE_BROKEN)
1736 broken = 1;
1737 filter->kind = type & FILTER_REFS_KIND_MASK;
1738
35257aa0 1739 /* Simple per-ref filtering */
5b4f2851 1740 if (!filter->kind)
14de7fba 1741 die("filter_refs: invalid type");
5b4f2851
KN
1742 else {
1743 /*
1744 * For common cases where we need only branches or remotes or tags,
1745 * we only iterate through those refs. If a mix of refs is needed,
1746 * we iterate over all refs and filter out required refs with the help
1747 * of filter_ref_kind().
1748 */
1749 if (filter->kind == FILTER_REFS_BRANCHES)
1750 ret = for_each_fullref_in("refs/heads/", ref_filter_handler, &ref_cbdata, broken);
1751 else if (filter->kind == FILTER_REFS_REMOTES)
1752 ret = for_each_fullref_in("refs/remotes/", ref_filter_handler, &ref_cbdata, broken);
1753 else if (filter->kind == FILTER_REFS_TAGS)
1754 ret = for_each_fullref_in("refs/tags/", ref_filter_handler, &ref_cbdata, broken);
1755 else if (filter->kind & FILTER_REFS_ALL)
1756 ret = for_each_fullref_in("", ref_filter_handler, &ref_cbdata, broken);
1757 if (!ret && (filter->kind & FILTER_REFS_DETACHED_HEAD))
1758 head_ref(ref_filter_handler, &ref_cbdata);
1759 }
1760
35257aa0
KN
1761
1762 /* Filters that need revision walking */
1763 if (filter->merge_commit)
1764 do_merge_filter(&ref_cbdata);
1765
1766 return ret;
14de7fba
KN
1767}
1768
c95b7585
KN
1769static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, struct ref_array_item *b)
1770{
1771 struct atom_value *va, *vb;
1772 int cmp;
b072add7 1773 cmp_type cmp_type = used_atom[s->atom].type;
3bb16a8b 1774 int (*cmp_fn)(const char *, const char *);
c95b7585
KN
1775
1776 get_ref_atom_value(a, s->atom, &va);
1777 get_ref_atom_value(b, s->atom, &vb);
3bb16a8b 1778 cmp_fn = s->ignore_case ? strcasecmp : strcmp;
90c00408
KN
1779 if (s->version)
1780 cmp = versioncmp(va->s, vb->s);
1781 else if (cmp_type == FIELD_STR)
3bb16a8b 1782 cmp = cmp_fn(va->s, vb->s);
90c00408 1783 else {
c95b7585
KN
1784 if (va->ul < vb->ul)
1785 cmp = -1;
1786 else if (va->ul == vb->ul)
3bb16a8b 1787 cmp = cmp_fn(a->refname, b->refname);
c95b7585
KN
1788 else
1789 cmp = 1;
c95b7585 1790 }
90c00408 1791
c95b7585
KN
1792 return (s->reverse) ? -cmp : cmp;
1793}
1794
1795static struct ref_sorting *ref_sorting;
1796static int compare_refs(const void *a_, const void *b_)
1797{
1798 struct ref_array_item *a = *((struct ref_array_item **)a_);
1799 struct ref_array_item *b = *((struct ref_array_item **)b_);
1800 struct ref_sorting *s;
1801
1802 for (s = ref_sorting; s; s = s->next) {
1803 int cmp = cmp_ref_sorting(s, a, b);
1804 if (cmp)
1805 return cmp;
1806 }
1807 return 0;
1808}
1809
1810void ref_array_sort(struct ref_sorting *sorting, struct ref_array *array)
1811{
1812 ref_sorting = sorting;
9ed0d8d6 1813 QSORT(array->items, array->nr, compare_refs);
c95b7585
KN
1814}
1815
574e96a2 1816static void append_literal(const char *cp, const char *ep, struct ref_formatting_state *state)
c95b7585 1817{
574e96a2
KN
1818 struct strbuf *s = &state->stack->output;
1819
c95b7585
KN
1820 while (*cp && (!ep || cp < ep)) {
1821 if (*cp == '%') {
1822 if (cp[1] == '%')
1823 cp++;
1824 else {
d2330973 1825 int ch = hex2chr(cp + 1);
c95b7585 1826 if (0 <= ch) {
574e96a2 1827 strbuf_addch(s, ch);
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1828 cp += 3;
1829 continue;
1830 }
1831 }
1832 }
574e96a2 1833 strbuf_addch(s, *cp);
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1834 cp++;
1835 }
1836}
1837
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1838void format_ref_array_item(struct ref_array_item *info, const char *format,
1839 int quote_style, struct strbuf *final_buf)
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1840{
1841 const char *cp, *sp, *ep;
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1842 struct ref_formatting_state state = REF_FORMATTING_STATE_INIT;
1843
1844 state.quote_style = quote_style;
1845 push_stack_element(&state.stack);
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1846
1847 for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) {
1848 struct atom_value *atomv;
1849
1850 ep = strchr(sp, ')');
1851 if (cp < sp)
574e96a2 1852 append_literal(cp, sp, &state);
c95b7585 1853 get_ref_atom_value(info, parse_ref_filter_atom(sp + 2, ep), &atomv);
63d89fbc 1854 atomv->handler(atomv, &state);
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1855 }
1856 if (*cp) {
1857 sp = cp + strlen(cp);
574e96a2 1858 append_literal(cp, sp, &state);
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1859 }
1860 if (need_color_reset_at_eol) {
1861 struct atom_value resetv;
1862 char color[COLOR_MAXLEN] = "";
1863
1864 if (color_parse("reset", color) < 0)
1865 die("BUG: couldn't parse 'reset' as a color");
1866 resetv.s = color;
574e96a2 1867 append_atom(&resetv, &state);
c95b7585 1868 }
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1869 if (state.stack->prev)
1870 die(_("format: %%(end) atom missing"));
99c6a71d 1871 strbuf_addbuf(final_buf, &state.stack->output);
574e96a2 1872 pop_stack_element(&state.stack);
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1873}
1874
1875void show_ref_array_item(struct ref_array_item *info, const char *format, int quote_style)
1876{
1877 struct strbuf final_buf = STRBUF_INIT;
1878
1879 format_ref_array_item(info, format, quote_style, &final_buf);
1880 fwrite(final_buf.buf, 1, final_buf.len, stdout);
1881 strbuf_release(&final_buf);
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1882 putchar('\n');
1883}
1884
1885/* If no sorting option is given, use refname to sort as default */
1886struct ref_sorting *ref_default_sorting(void)
1887{
1888 static const char cstr_name[] = "refname";
1889
1890 struct ref_sorting *sorting = xcalloc(1, sizeof(*sorting));
1891
1892 sorting->next = NULL;
1893 sorting->atom = parse_ref_filter_atom(cstr_name, cstr_name + strlen(cstr_name));
1894 return sorting;
1895}
1896
1897int parse_opt_ref_sorting(const struct option *opt, const char *arg, int unset)
1898{
1899 struct ref_sorting **sorting_tail = opt->value;
1900 struct ref_sorting *s;
1901 int len;
1902
1903 if (!arg) /* should --no-sort void the list ? */
1904 return -1;
1905
1906 s = xcalloc(1, sizeof(*s));
1907 s->next = *sorting_tail;
1908 *sorting_tail = s;
1909
1910 if (*arg == '-') {
1911 s->reverse = 1;
1912 arg++;
1913 }
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1914 if (skip_prefix(arg, "version:", &arg) ||
1915 skip_prefix(arg, "v:", &arg))
1916 s->version = 1;
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1917 len = strlen(arg);
1918 s->atom = parse_ref_filter_atom(arg, arg+len);
1919 return 0;
1920}
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1921
1922int parse_opt_merge_filter(const struct option *opt, const char *arg, int unset)
1923{
1924 struct ref_filter *rf = opt->value;
1925 unsigned char sha1[20];
1926
1927 rf->merge = starts_with(opt->long_name, "no")
1928 ? REF_FILTER_MERGED_OMIT
1929 : REF_FILTER_MERGED_INCLUDE;
1930
1931 if (get_sha1(arg, sha1))
1932 die(_("malformed object name %s"), arg);
1933
1934 rf->merge_commit = lookup_commit_reference_gently(sha1, 0);
1935 if (!rf->merge_commit)
1936 return opterror(opt, "must point to a commit", 0);
1937
1938 return 0;
1939}