Merge branch 'jk/blame-fixes'
[git] / builtin / tag.c
1 /*
2  * Builtin "git tag"
3  *
4  * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
5  *                    Carlos Rica <jasampler@gmail.com>
6  * Based on git-tag.sh and mktag.c by Linus Torvalds.
7  */
8
9 #include "cache.h"
10 #include "builtin.h"
11 #include "refs.h"
12 #include "tag.h"
13 #include "run-command.h"
14 #include "parse-options.h"
15 #include "diff.h"
16 #include "revision.h"
17 #include "gpg-interface.h"
18 #include "sha1-array.h"
19 #include "column.h"
20 #include "ref-filter.h"
21
22 static const char * const git_tag_usage[] = {
23         N_("git tag [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] <tagname> [<head>]"),
24         N_("git tag -d <tagname>..."),
25         N_("git tag -l [-n[<num>]] [--contains <commit>] [--points-at <object>]"
26                 "\n\t\t[--format=<format>] [--[no-]merged [<commit>]] [<pattern>...]"),
27         N_("git tag -v <tagname>..."),
28         NULL
29 };
30
31 static unsigned int colopts;
32 static int force_sign_annotate;
33
34 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting, const char *format)
35 {
36         struct ref_array array;
37         char *to_free = NULL;
38         int i;
39
40         memset(&array, 0, sizeof(array));
41
42         if (filter->lines == -1)
43                 filter->lines = 0;
44
45         if (!format) {
46                 if (filter->lines) {
47                         to_free = xstrfmt("%s %%(contents:lines=%d)",
48                                           "%(align:15)%(refname:strip=2)%(end)",
49                                           filter->lines);
50                         format = to_free;
51                 } else
52                         format = "%(refname:strip=2)";
53         }
54
55         verify_ref_format(format);
56         filter->with_commit_tag_algo = 1;
57         filter_refs(&array, filter, FILTER_REFS_TAGS);
58         ref_array_sort(sorting, &array);
59
60         for (i = 0; i < array.nr; i++)
61                 show_ref_array_item(array.items[i], format, 0);
62         ref_array_clear(&array);
63         free(to_free);
64
65         return 0;
66 }
67
68 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
69                                 const unsigned char *sha1);
70
71 static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
72 {
73         const char **p;
74         char ref[PATH_MAX];
75         int had_error = 0;
76         unsigned char sha1[20];
77
78         for (p = argv; *p; p++) {
79                 if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
80                                         >= sizeof(ref)) {
81                         error(_("tag name too long: %.*s..."), 50, *p);
82                         had_error = 1;
83                         continue;
84                 }
85                 if (read_ref(ref, sha1)) {
86                         error(_("tag '%s' not found."), *p);
87                         had_error = 1;
88                         continue;
89                 }
90                 if (fn(*p, ref, sha1))
91                         had_error = 1;
92         }
93         return had_error;
94 }
95
96 static int delete_tag(const char *name, const char *ref,
97                                 const unsigned char *sha1)
98 {
99         if (delete_ref(ref, sha1, 0))
100                 return 1;
101         printf(_("Deleted tag '%s' (was %s)\n"), name, find_unique_abbrev(sha1, DEFAULT_ABBREV));
102         return 0;
103 }
104
105 static int verify_tag(const char *name, const char *ref,
106                                 const unsigned char *sha1)
107 {
108         return gpg_verify_tag(sha1, name, GPG_VERIFY_VERBOSE);
109 }
110
111 static int do_sign(struct strbuf *buffer)
112 {
113         return sign_buffer(buffer, buffer, get_signing_key());
114 }
115
116 static const char tag_template[] =
117         N_("\nWrite a message for tag:\n  %s\n"
118         "Lines starting with '%c' will be ignored.\n");
119
120 static const char tag_template_nocleanup[] =
121         N_("\nWrite a message for tag:\n  %s\n"
122         "Lines starting with '%c' will be kept; you may remove them"
123         " yourself if you want to.\n");
124
125 /* Parse arg given and add it the ref_sorting array */
126 static int parse_sorting_string(const char *arg, struct ref_sorting **sorting_tail)
127 {
128         struct ref_sorting *s;
129         int len;
130
131         s = xcalloc(1, sizeof(*s));
132         s->next = *sorting_tail;
133         *sorting_tail = s;
134
135         if (*arg == '-') {
136                 s->reverse = 1;
137                 arg++;
138         }
139         if (skip_prefix(arg, "version:", &arg) ||
140             skip_prefix(arg, "v:", &arg))
141                 s->version = 1;
142
143         len = strlen(arg);
144         s->atom = parse_ref_filter_atom(arg, arg+len);
145
146         return 0;
147 }
148
149 static int git_tag_config(const char *var, const char *value, void *cb)
150 {
151         int status;
152         struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
153
154         if (!strcmp(var, "tag.sort")) {
155                 if (!value)
156                         return config_error_nonbool(var);
157                 parse_sorting_string(value, sorting_tail);
158                 return 0;
159         }
160
161         status = git_gpg_config(var, value, cb);
162         if (status)
163                 return status;
164         if (!strcmp(var, "tag.forcesignannotated")) {
165                 force_sign_annotate = git_config_bool(var, value);
166                 return 0;
167         }
168
169         if (starts_with(var, "column."))
170                 return git_column_config(var, value, "tag", &colopts);
171         return git_default_config(var, value, cb);
172 }
173
174 static void write_tag_body(int fd, const unsigned char *sha1)
175 {
176         unsigned long size;
177         enum object_type type;
178         char *buf, *sp;
179
180         buf = read_sha1_file(sha1, &type, &size);
181         if (!buf)
182                 return;
183         /* skip header */
184         sp = strstr(buf, "\n\n");
185
186         if (!sp || !size || type != OBJ_TAG) {
187                 free(buf);
188                 return;
189         }
190         sp += 2; /* skip the 2 LFs */
191         write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
192
193         free(buf);
194 }
195
196 static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
197 {
198         if (sign && do_sign(buf) < 0)
199                 return error(_("unable to sign the tag"));
200         if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
201                 return error(_("unable to write tag file"));
202         return 0;
203 }
204
205 struct create_tag_options {
206         unsigned int message_given:1;
207         unsigned int sign;
208         enum {
209                 CLEANUP_NONE,
210                 CLEANUP_SPACE,
211                 CLEANUP_ALL
212         } cleanup_mode;
213 };
214
215 static void create_tag(const unsigned char *object, const char *tag,
216                        struct strbuf *buf, struct create_tag_options *opt,
217                        unsigned char *prev, unsigned char *result)
218 {
219         enum object_type type;
220         char header_buf[1024];
221         int header_len;
222         char *path = NULL;
223
224         type = sha1_object_info(object, NULL);
225         if (type <= OBJ_NONE)
226             die(_("bad object type."));
227
228         header_len = snprintf(header_buf, sizeof(header_buf),
229                           "object %s\n"
230                           "type %s\n"
231                           "tag %s\n"
232                           "tagger %s\n\n",
233                           sha1_to_hex(object),
234                           typename(type),
235                           tag,
236                           git_committer_info(IDENT_STRICT));
237
238         if (header_len > sizeof(header_buf) - 1)
239                 die(_("tag header too big."));
240
241         if (!opt->message_given) {
242                 int fd;
243
244                 /* write the template message before editing: */
245                 path = git_pathdup("TAG_EDITMSG");
246                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
247                 if (fd < 0)
248                         die_errno(_("could not create file '%s'"), path);
249
250                 if (!is_null_sha1(prev)) {
251                         write_tag_body(fd, prev);
252                 } else {
253                         struct strbuf buf = STRBUF_INIT;
254                         strbuf_addch(&buf, '\n');
255                         if (opt->cleanup_mode == CLEANUP_ALL)
256                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
257                         else
258                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
259                         write_or_die(fd, buf.buf, buf.len);
260                         strbuf_release(&buf);
261                 }
262                 close(fd);
263
264                 if (launch_editor(path, buf, NULL)) {
265                         fprintf(stderr,
266                         _("Please supply the message using either -m or -F option.\n"));
267                         exit(1);
268                 }
269         }
270
271         if (opt->cleanup_mode != CLEANUP_NONE)
272                 strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
273
274         if (!opt->message_given && !buf->len)
275                 die(_("no tag message?"));
276
277         strbuf_insert(buf, 0, header_buf, header_len);
278
279         if (build_tag_object(buf, opt->sign, result) < 0) {
280                 if (path)
281                         fprintf(stderr, _("The tag message has been left in %s\n"),
282                                 path);
283                 exit(128);
284         }
285         if (path) {
286                 unlink_or_warn(path);
287                 free(path);
288         }
289 }
290
291 struct msg_arg {
292         int given;
293         struct strbuf buf;
294 };
295
296 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
297 {
298         struct msg_arg *msg = opt->value;
299
300         if (!arg)
301                 return -1;
302         if (msg->buf.len)
303                 strbuf_addstr(&(msg->buf), "\n\n");
304         strbuf_addstr(&(msg->buf), arg);
305         msg->given = 1;
306         return 0;
307 }
308
309 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
310 {
311         if (name[0] == '-')
312                 return -1;
313
314         strbuf_reset(sb);
315         strbuf_addf(sb, "refs/tags/%s", name);
316
317         return check_refname_format(sb->buf, 0);
318 }
319
320 int cmd_tag(int argc, const char **argv, const char *prefix)
321 {
322         struct strbuf buf = STRBUF_INIT;
323         struct strbuf ref = STRBUF_INIT;
324         unsigned char object[20], prev[20];
325         const char *object_ref, *tag;
326         struct create_tag_options opt;
327         char *cleanup_arg = NULL;
328         int create_reflog = 0;
329         int annotate = 0, force = 0;
330         int cmdmode = 0, create_tag_object = 0;
331         const char *msgfile = NULL, *keyid = NULL;
332         struct msg_arg msg = { 0, STRBUF_INIT };
333         struct ref_transaction *transaction;
334         struct strbuf err = STRBUF_INIT;
335         struct ref_filter filter;
336         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
337         const char *format = NULL;
338         int icase = 0;
339         struct option options[] = {
340                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
341                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
342                                 N_("print <n> lines of each tag message"),
343                                 PARSE_OPT_OPTARG, NULL, 1 },
344                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
345                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
346
347                 OPT_GROUP(N_("Tag creation options")),
348                 OPT_BOOL('a', "annotate", &annotate,
349                                         N_("annotated tag, needs a message")),
350                 OPT_CALLBACK('m', "message", &msg, N_("message"),
351                              N_("tag message"), parse_msg_arg),
352                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
353                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
354                 OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
355                         N_("how to strip spaces and #comments from message")),
356                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
357                                         N_("use another key to sign the tag")),
358                 OPT__FORCE(&force, N_("replace the tag if exists")),
359                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
360
361                 OPT_GROUP(N_("Tag listing options")),
362                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
363                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
364                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
365                 OPT_MERGED(&filter, N_("print only tags that are merged")),
366                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
367                 OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
368                              N_("field name to sort on"), &parse_opt_ref_sorting),
369                 {
370                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
371                         N_("print only tags of the object"), 0, parse_opt_object_name
372                 },
373                 OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
374                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
375                 OPT_END()
376         };
377
378         git_config(git_tag_config, sorting_tail);
379
380         memset(&opt, 0, sizeof(opt));
381         memset(&filter, 0, sizeof(filter));
382         filter.lines = -1;
383
384         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
385
386         if (keyid) {
387                 opt.sign = 1;
388                 set_signing_key(keyid);
389         }
390         create_tag_object = (opt.sign || annotate || msg.given || msgfile);
391
392         if (argc == 0 && !cmdmode)
393                 cmdmode = 'l';
394
395         if ((create_tag_object || force) && (cmdmode != 0))
396                 usage_with_options(git_tag_usage, options);
397
398         finalize_colopts(&colopts, -1);
399         if (cmdmode == 'l' && filter.lines != -1) {
400                 if (explicitly_enable_column(colopts))
401                         die(_("--column and -n are incompatible"));
402                 colopts = 0;
403         }
404         if (!sorting)
405                 sorting = ref_default_sorting();
406         sorting->ignore_case = icase;
407         filter.ignore_case = icase;
408         if (cmdmode == 'l') {
409                 int ret;
410                 if (column_active(colopts)) {
411                         struct column_options copts;
412                         memset(&copts, 0, sizeof(copts));
413                         copts.padding = 2;
414                         run_column_filter(colopts, &copts);
415                 }
416                 filter.name_patterns = argv;
417                 ret = list_tags(&filter, sorting, format);
418                 if (column_active(colopts))
419                         stop_column_filter();
420                 return ret;
421         }
422         if (filter.lines != -1)
423                 die(_("-n option is only allowed with -l."));
424         if (filter.with_commit)
425                 die(_("--contains option is only allowed with -l."));
426         if (filter.points_at.nr)
427                 die(_("--points-at option is only allowed with -l."));
428         if (filter.merge_commit)
429                 die(_("--merged and --no-merged option are only allowed with -l"));
430         if (cmdmode == 'd')
431                 return for_each_tag_name(argv, delete_tag);
432         if (cmdmode == 'v')
433                 return for_each_tag_name(argv, verify_tag);
434
435         if (msg.given || msgfile) {
436                 if (msg.given && msgfile)
437                         die(_("only one -F or -m option is allowed."));
438                 if (msg.given)
439                         strbuf_addbuf(&buf, &(msg.buf));
440                 else {
441                         if (!strcmp(msgfile, "-")) {
442                                 if (strbuf_read(&buf, 0, 1024) < 0)
443                                         die_errno(_("cannot read '%s'"), msgfile);
444                         } else {
445                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
446                                         die_errno(_("could not open or read '%s'"),
447                                                 msgfile);
448                         }
449                 }
450         }
451
452         tag = argv[0];
453
454         object_ref = argc == 2 ? argv[1] : "HEAD";
455         if (argc > 2)
456                 die(_("too many params"));
457
458         if (get_sha1(object_ref, object))
459                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
460
461         if (strbuf_check_tag_ref(&ref, tag))
462                 die(_("'%s' is not a valid tag name."), tag);
463
464         if (read_ref(ref.buf, prev))
465                 hashclr(prev);
466         else if (!force)
467                 die(_("tag '%s' already exists"), tag);
468
469         opt.message_given = msg.given || msgfile;
470
471         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
472                 opt.cleanup_mode = CLEANUP_ALL;
473         else if (!strcmp(cleanup_arg, "verbatim"))
474                 opt.cleanup_mode = CLEANUP_NONE;
475         else if (!strcmp(cleanup_arg, "whitespace"))
476                 opt.cleanup_mode = CLEANUP_SPACE;
477         else
478                 die(_("Invalid cleanup mode %s"), cleanup_arg);
479
480         if (create_tag_object) {
481                 if (force_sign_annotate && !annotate)
482                         opt.sign = 1;
483                 create_tag(object, tag, &buf, &opt, prev, object);
484         }
485
486         transaction = ref_transaction_begin(&err);
487         if (!transaction ||
488             ref_transaction_update(transaction, ref.buf, object, prev,
489                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
490                                    NULL, &err) ||
491             ref_transaction_commit(transaction, &err))
492                 die("%s", err.buf);
493         ref_transaction_free(transaction);
494         if (force && !is_null_sha1(prev) && hashcmp(prev, object))
495                 printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
496
497         strbuf_release(&err);
498         strbuf_release(&buf);
499         strbuf_release(&ref);
500         return 0;
501 }