7 #include "parse-options.h"
8 #include "sha1-lookup.h"
9 #include "commit-slab.h"
11 #define CUTOFF_DATE_SLOP 86400 /* one day */
13 typedef struct rev_name
{
15 timestamp_t taggerdate
;
21 define_commit_slab(commit_rev_name
, struct rev_name
*);
23 static timestamp_t cutoff
= TIME_MAX
;
24 static struct commit_rev_name rev_names
;
26 /* How many generations are maximally preferred over _one_ merge traversal? */
27 #define MERGE_TRAVERSAL_WEIGHT 65535
29 static struct rev_name
*get_commit_rev_name(struct commit
*commit
)
31 struct rev_name
**slot
= commit_rev_name_peek(&rev_names
, commit
);
33 return slot
? *slot
: NULL
;
36 static void set_commit_rev_name(struct commit
*commit
, struct rev_name
*name
)
38 *commit_rev_name_at(&rev_names
, commit
) = name
;
41 static int is_better_name(struct rev_name
*name
,
43 timestamp_t taggerdate
,
49 * When comparing names based on tags, prefer names
50 * based on the older tag, even if it is farther away.
52 if (from_tag
&& name
->from_tag
)
53 return (name
->taggerdate
> taggerdate
||
54 (name
->taggerdate
== taggerdate
&&
55 name
->distance
> distance
));
58 * We know that at least one of them is a non-tag at this point.
59 * favor a tag over a non-tag.
61 if (name
->from_tag
!= from_tag
)
65 * We are now looking at two non-tags. Tiebreak to favor
68 if (name
->distance
!= distance
)
69 return name
->distance
> distance
;
71 /* ... or tiebreak to favor older date */
72 if (name
->taggerdate
!= taggerdate
)
73 return name
->taggerdate
> taggerdate
;
75 /* keep the current one if we cannot decide */
79 static void name_rev(struct commit
*commit
,
80 const char *tip_name
, timestamp_t taggerdate
,
81 int generation
, int distance
, int from_tag
,
84 struct rev_name
*name
= get_commit_rev_name(commit
);
85 struct commit_list
*parents
;
86 int parent_number
= 1;
91 if (commit
->date
< cutoff
)
95 tip_name
= to_free
= xstrfmt("%s^0", tip_name
);
98 die("generation: %d, but deref?", generation
);
102 name
= xmalloc(sizeof(rev_name
));
103 set_commit_rev_name(commit
, name
);
105 } else if (is_better_name(name
, tip_name
, taggerdate
,
106 generation
, distance
, from_tag
)) {
108 name
->tip_name
= tip_name
;
109 name
->taggerdate
= taggerdate
;
110 name
->generation
= generation
;
111 name
->distance
= distance
;
112 name
->from_tag
= from_tag
;
118 for (parents
= commit
->parents
;
120 parents
= parents
->next
, parent_number
++) {
121 if (parent_number
> 1) {
125 strip_suffix(tip_name
, "^0", &len
);
127 new_name
= xstrfmt("%.*s~%d^%d", (int)len
, tip_name
,
128 generation
, parent_number
);
130 new_name
= xstrfmt("%.*s^%d", (int)len
, tip_name
,
133 name_rev(parents
->item
, new_name
, taggerdate
, 0,
134 distance
+ MERGE_TRAVERSAL_WEIGHT
,
137 name_rev(parents
->item
, tip_name
, taggerdate
,
138 generation
+ 1, distance
+ 1,
144 static int subpath_matches(const char *path
, const char *filter
)
146 const char *subpath
= path
;
149 if (!wildmatch(filter
, subpath
, 0))
150 return subpath
- path
;
151 subpath
= strchr(subpath
, '/');
158 static const char *name_ref_abbrev(const char *refname
, int shorten_unambiguous
)
160 if (shorten_unambiguous
)
161 refname
= shorten_unambiguous_ref(refname
, 0);
162 else if (starts_with(refname
, "refs/heads/"))
163 refname
= refname
+ 11;
164 else if (starts_with(refname
, "refs/"))
165 refname
= refname
+ 5;
169 struct name_ref_data
{
172 struct string_list ref_filters
;
173 struct string_list exclude_filters
;
176 static struct tip_table
{
177 struct tip_table_entry
{
178 struct object_id oid
;
186 static void add_to_tip_table(const struct object_id
*oid
, const char *refname
,
187 int shorten_unambiguous
)
189 refname
= name_ref_abbrev(refname
, shorten_unambiguous
);
191 ALLOC_GROW(tip_table
.table
, tip_table
.nr
+ 1, tip_table
.alloc
);
192 oidcpy(&tip_table
.table
[tip_table
.nr
].oid
, oid
);
193 tip_table
.table
[tip_table
.nr
].refname
= xstrdup(refname
);
195 tip_table
.sorted
= 0;
198 static int tipcmp(const void *a_
, const void *b_
)
200 const struct tip_table_entry
*a
= a_
, *b
= b_
;
201 return oidcmp(&a
->oid
, &b
->oid
);
204 static int name_ref(const char *path
, const struct object_id
*oid
, int flags
, void *cb_data
)
206 struct object
*o
= parse_object(oid
);
207 struct name_ref_data
*data
= cb_data
;
208 int can_abbreviate_output
= data
->tags_only
&& data
->name_only
;
210 timestamp_t taggerdate
= TIME_MAX
;
212 if (data
->tags_only
&& !starts_with(path
, "refs/tags/"))
215 if (data
->exclude_filters
.nr
) {
216 struct string_list_item
*item
;
218 for_each_string_list_item(item
, &data
->exclude_filters
) {
219 if (subpath_matches(path
, item
->string
) >= 0)
224 if (data
->ref_filters
.nr
) {
225 struct string_list_item
*item
;
228 /* See if any of the patterns match. */
229 for_each_string_list_item(item
, &data
->ref_filters
) {
231 * Check all patterns even after finding a match, so
232 * that we can see if a match with a subpath exists.
233 * When a user asked for 'refs/tags/v*' and 'v1.*',
234 * both of which match, the user is showing her
235 * willingness to accept a shortened output by having
236 * the 'v1.*' in the acceptable refnames, so we
237 * shouldn't stop when seeing 'refs/tags/v1.4' matches
238 * 'refs/tags/v*'. We should show it as 'v1.4'.
240 switch (subpath_matches(path
, item
->string
)) {
241 case -1: /* did not match */
243 case 0: /* matched fully */
246 default: /* matched subpath */
248 can_abbreviate_output
= 1;
253 /* If none of the patterns matched, stop now */
258 add_to_tip_table(oid
, path
, can_abbreviate_output
);
260 while (o
&& o
->type
== OBJ_TAG
) {
261 struct tag
*t
= (struct tag
*) o
;
263 break; /* broken repository */
264 o
= parse_object(&t
->tagged
->oid
);
266 taggerdate
= t
->date
;
268 if (o
&& o
->type
== OBJ_COMMIT
) {
269 struct commit
*commit
= (struct commit
*)o
;
270 int from_tag
= starts_with(path
, "refs/tags/");
272 if (taggerdate
== TIME_MAX
)
273 taggerdate
= ((struct commit
*)o
)->date
;
274 path
= name_ref_abbrev(path
, can_abbreviate_output
);
275 name_rev(commit
, xstrdup(path
), taggerdate
, 0, 0,
281 static const unsigned char *nth_tip_table_ent(size_t ix
, void *table_
)
283 struct tip_table_entry
*table
= table_
;
284 return table
[ix
].oid
.hash
;
287 static const char *get_exact_ref_match(const struct object
*o
)
291 if (!tip_table
.table
|| !tip_table
.nr
)
294 if (!tip_table
.sorted
) {
295 QSORT(tip_table
.table
, tip_table
.nr
, tipcmp
);
296 tip_table
.sorted
= 1;
299 found
= sha1_pos(o
->oid
.hash
, tip_table
.table
, tip_table
.nr
,
302 return tip_table
.table
[found
].refname
;
306 /* may return a constant string or use "buf" as scratch space */
307 static const char *get_rev_name(const struct object
*o
, struct strbuf
*buf
)
312 if (o
->type
!= OBJ_COMMIT
)
313 return get_exact_ref_match(o
);
314 c
= (struct commit
*) o
;
315 n
= get_commit_rev_name(c
);
322 int len
= strlen(n
->tip_name
);
323 if (len
> 2 && !strcmp(n
->tip_name
+ len
- 2, "^0"))
326 strbuf_addf(buf
, "%.*s~%d", len
, n
->tip_name
, n
->generation
);
331 static void show_name(const struct object
*obj
,
332 const char *caller_name
,
333 int always
, int allow_undefined
, int name_only
)
336 const struct object_id
*oid
= &obj
->oid
;
337 struct strbuf buf
= STRBUF_INIT
;
340 printf("%s ", caller_name
? caller_name
: oid_to_hex(oid
));
341 name
= get_rev_name(obj
, &buf
);
343 printf("%s\n", name
);
344 else if (allow_undefined
)
345 printf("undefined\n");
347 printf("%s\n", find_unique_abbrev(oid
, DEFAULT_ABBREV
));
349 die("cannot describe '%s'", oid_to_hex(oid
));
350 strbuf_release(&buf
);
353 static char const * const name_rev_usage
[] = {
354 N_("git name-rev [<options>] <commit>..."),
355 N_("git name-rev [<options>] --all"),
356 N_("git name-rev [<options>] --stdin"),
360 static void name_rev_line(char *p
, struct name_ref_data
*data
)
362 struct strbuf buf
= STRBUF_INIT
;
365 for (p_start
= p
; *p
; p
++) {
366 #define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f'))
369 else if (++forty
== GIT_SHA1_HEXSZ
&&
371 struct object_id oid
;
372 const char *name
= NULL
;
374 int p_len
= p
- p_start
+ 1;
379 if (!get_oid(p
- (GIT_SHA1_HEXSZ
- 1), &oid
)) {
381 lookup_object(oid
.hash
);
383 name
= get_rev_name(o
, &buf
);
391 printf("%.*s%s", p_len
- GIT_SHA1_HEXSZ
, p_start
, name
);
393 printf("%.*s (%s)", p_len
, p_start
, name
);
400 fwrite(p_start
, p
- p_start
, 1, stdout
);
402 strbuf_release(&buf
);
405 int cmd_name_rev(int argc
, const char **argv
, const char *prefix
)
407 struct object_array revs
= OBJECT_ARRAY_INIT
;
408 int all
= 0, transform_stdin
= 0, allow_undefined
= 1, always
= 0, peel_tag
= 0;
409 struct name_ref_data data
= { 0, 0, STRING_LIST_INIT_NODUP
, STRING_LIST_INIT_NODUP
};
410 struct option opts
[] = {
411 OPT_BOOL(0, "name-only", &data
.name_only
, N_("print only names (no SHA-1)")),
412 OPT_BOOL(0, "tags", &data
.tags_only
, N_("only use tags to name the commits")),
413 OPT_STRING_LIST(0, "refs", &data
.ref_filters
, N_("pattern"),
414 N_("only use refs matching <pattern>")),
415 OPT_STRING_LIST(0, "exclude", &data
.exclude_filters
, N_("pattern"),
416 N_("ignore refs matching <pattern>")),
418 OPT_BOOL(0, "all", &all
, N_("list all commits reachable from all refs")),
419 OPT_BOOL(0, "stdin", &transform_stdin
, N_("read from stdin")),
420 OPT_BOOL(0, "undefined", &allow_undefined
, N_("allow to print `undefined` names (default)")),
421 OPT_BOOL(0, "always", &always
,
422 N_("show abbreviated commit object as fallback")),
424 /* A Hidden OPT_BOOL */
425 OPTION_SET_INT
, 0, "peel-tag", &peel_tag
, NULL
,
426 N_("dereference tags in the input (internal use)"),
427 PARSE_OPT_NOARG
| PARSE_OPT_HIDDEN
, NULL
, 1,
432 init_commit_rev_name(&rev_names
);
433 git_config(git_default_config
, NULL
);
434 argc
= parse_options(argc
, argv
, prefix
, opts
, name_rev_usage
, 0);
435 if (all
+ transform_stdin
+ !!argc
> 1) {
436 error("Specify either a list, or --all, not both!");
437 usage_with_options(name_rev_usage
, opts
);
439 if (all
|| transform_stdin
)
442 for (; argc
; argc
--, argv
++) {
443 struct object_id oid
;
444 struct object
*object
;
445 struct commit
*commit
;
447 if (get_oid(*argv
, &oid
)) {
448 fprintf(stderr
, "Could not get sha1 for %s. Skipping.\n",
454 object
= parse_object(&oid
);
456 struct object
*peeled
= deref_tag(object
, *argv
, 0);
457 if (peeled
&& peeled
->type
== OBJ_COMMIT
)
458 commit
= (struct commit
*)peeled
;
462 fprintf(stderr
, "Could not get object for %s. Skipping.\n",
468 if (cutoff
> commit
->date
)
469 cutoff
= commit
->date
;
474 fprintf(stderr
, "Could not get commit for %s. Skipping.\n",
478 object
= (struct object
*)commit
;
480 add_object_array(object
, *argv
, &revs
);
484 cutoff
= cutoff
- CUTOFF_DATE_SLOP
;
485 for_each_ref(name_ref
, &data
);
487 if (transform_stdin
) {
490 while (!feof(stdin
)) {
491 char *p
= fgets(buffer
, sizeof(buffer
), stdin
);
494 name_rev_line(p
, &data
);
499 max
= get_max_object_index();
500 for (i
= 0; i
< max
; i
++) {
501 struct object
*obj
= get_indexed_object(i
);
502 if (!obj
|| obj
->type
!= OBJ_COMMIT
)
505 always
, allow_undefined
, data
.name_only
);
509 for (i
= 0; i
< revs
.nr
; i
++)
510 show_name(revs
.objects
[i
].item
, revs
.objects
[i
].name
,
511 always
, allow_undefined
, data
.name_only
);