am: remember --rerere-autoupdate setting
[git] / builtin / shortlog.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "config.h"
4 #include "commit.h"
5 #include "diff.h"
6 #include "string-list.h"
7 #include "revision.h"
8 #include "utf8.h"
9 #include "mailmap.h"
10 #include "shortlog.h"
11 #include "parse-options.h"
12
13 static char const * const shortlog_usage[] = {
14         N_("git shortlog [<options>] [<revision-range>] [[--] [<path>...]]"),
15         NULL
16 };
17
18 /*
19  * The util field of our string_list_items will contain one of two things:
20  *
21  *   - if --summary is not in use, it will point to a string list of the
22  *     oneline subjects assigned to this author
23  *
24  *   - if --summary is in use, we don't need that list; we only need to know
25  *     its size. So we abuse the pointer slot to store our integer counter.
26  *
27  *  This macro accesses the latter.
28  */
29 #define UTIL_TO_INT(x) ((intptr_t)(x)->util)
30
31 static int compare_by_counter(const void *a1, const void *a2)
32 {
33         const struct string_list_item *i1 = a1, *i2 = a2;
34         return UTIL_TO_INT(i2) - UTIL_TO_INT(i1);
35 }
36
37 static int compare_by_list(const void *a1, const void *a2)
38 {
39         const struct string_list_item *i1 = a1, *i2 = a2;
40         const struct string_list *l1 = i1->util, *l2 = i2->util;
41
42         if (l1->nr < l2->nr)
43                 return 1;
44         else if (l1->nr == l2->nr)
45                 return 0;
46         else
47                 return -1;
48 }
49
50 static void insert_one_record(struct shortlog *log,
51                               const char *author,
52                               const char *oneline)
53 {
54         struct string_list_item *item;
55         const char *mailbuf, *namebuf;
56         size_t namelen, maillen;
57         struct strbuf namemailbuf = STRBUF_INIT;
58         struct ident_split ident;
59
60         if (split_ident_line(&ident, author, strlen(author)))
61                 return;
62
63         namebuf = ident.name_begin;
64         mailbuf = ident.mail_begin;
65         namelen = ident.name_end - ident.name_begin;
66         maillen = ident.mail_end - ident.mail_begin;
67
68         map_user(&log->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
69         strbuf_add(&namemailbuf, namebuf, namelen);
70
71         if (log->email)
72                 strbuf_addf(&namemailbuf, " <%.*s>", (int)maillen, mailbuf);
73
74         item = string_list_insert(&log->list, namemailbuf.buf);
75
76         if (log->summary)
77                 item->util = (void *)(UTIL_TO_INT(item) + 1);
78         else {
79                 const char *dot3 = log->common_repo_prefix;
80                 char *buffer, *p;
81                 struct strbuf subject = STRBUF_INIT;
82                 const char *eol;
83
84                 /* Skip any leading whitespace, including any blank lines. */
85                 while (*oneline && isspace(*oneline))
86                         oneline++;
87                 eol = strchr(oneline, '\n');
88                 if (!eol)
89                         eol = oneline + strlen(oneline);
90                 if (starts_with(oneline, "[PATCH")) {
91                         char *eob = strchr(oneline, ']');
92                         if (eob && (!eol || eob < eol))
93                                 oneline = eob + 1;
94                 }
95                 while (*oneline && isspace(*oneline) && *oneline != '\n')
96                         oneline++;
97                 format_subject(&subject, oneline, " ");
98                 buffer = strbuf_detach(&subject, NULL);
99
100                 if (dot3) {
101                         int dot3len = strlen(dot3);
102                         if (dot3len > 5) {
103                                 while ((p = strstr(buffer, dot3)) != NULL) {
104                                         int taillen = strlen(p) - dot3len;
105                                         memcpy(p, "/.../", 5);
106                                         memmove(p + 5, p + dot3len, taillen + 1);
107                                 }
108                         }
109                 }
110
111                 if (item->util == NULL)
112                         item->util = xcalloc(1, sizeof(struct string_list));
113                 string_list_append(item->util, buffer);
114         }
115 }
116
117 static void read_from_stdin(struct shortlog *log)
118 {
119         struct strbuf author = STRBUF_INIT;
120         struct strbuf oneline = STRBUF_INIT;
121         static const char *author_match[2] = { "Author: ", "author " };
122         static const char *committer_match[2] = { "Commit: ", "committer " };
123         const char **match;
124
125         match = log->committer ? committer_match : author_match;
126         while (strbuf_getline_lf(&author, stdin) != EOF) {
127                 const char *v;
128                 if (!skip_prefix(author.buf, match[0], &v) &&
129                     !skip_prefix(author.buf, match[1], &v))
130                         continue;
131                 while (strbuf_getline_lf(&oneline, stdin) != EOF &&
132                        oneline.len)
133                         ; /* discard headers */
134                 while (strbuf_getline_lf(&oneline, stdin) != EOF &&
135                        !oneline.len)
136                         ; /* discard blanks */
137                 insert_one_record(log, v, oneline.buf);
138         }
139         strbuf_release(&author);
140         strbuf_release(&oneline);
141 }
142
143 void shortlog_add_commit(struct shortlog *log, struct commit *commit)
144 {
145         struct strbuf author = STRBUF_INIT;
146         struct strbuf oneline = STRBUF_INIT;
147         struct pretty_print_context ctx = {0};
148         const char *fmt;
149
150         ctx.fmt = CMIT_FMT_USERFORMAT;
151         ctx.abbrev = log->abbrev;
152         ctx.print_email_subject = 1;
153         ctx.date_mode.type = DATE_NORMAL;
154         ctx.output_encoding = get_log_output_encoding();
155
156         fmt = log->committer ? "%cn <%ce>" : "%an <%ae>";
157
158         format_commit_message(commit, fmt, &author, &ctx);
159         if (!log->summary) {
160                 if (log->user_format)
161                         pretty_print_commit(&ctx, commit, &oneline);
162                 else
163                         format_commit_message(commit, "%s", &oneline, &ctx);
164         }
165
166         insert_one_record(log, author.buf, oneline.len ? oneline.buf : "<none>");
167
168         strbuf_release(&author);
169         strbuf_release(&oneline);
170 }
171
172 static void get_from_rev(struct rev_info *rev, struct shortlog *log)
173 {
174         struct commit *commit;
175
176         if (prepare_revision_walk(rev))
177                 die(_("revision walk setup failed"));
178         while ((commit = get_revision(rev)) != NULL)
179                 shortlog_add_commit(log, commit);
180 }
181
182 static int parse_uint(char const **arg, int comma, int defval)
183 {
184         unsigned long ul;
185         int ret;
186         char *endp;
187
188         ul = strtoul(*arg, &endp, 10);
189         if (*endp && *endp != comma)
190                 return -1;
191         if (ul > INT_MAX)
192                 return -1;
193         ret = *arg == endp ? defval : (int)ul;
194         *arg = *endp ? endp + 1 : endp;
195         return ret;
196 }
197
198 static const char wrap_arg_usage[] = "-w[<width>[,<indent1>[,<indent2>]]]";
199 #define DEFAULT_WRAPLEN 76
200 #define DEFAULT_INDENT1 6
201 #define DEFAULT_INDENT2 9
202
203 static int parse_wrap_args(const struct option *opt, const char *arg, int unset)
204 {
205         struct shortlog *log = opt->value;
206
207         log->wrap_lines = !unset;
208         if (unset)
209                 return 0;
210         if (!arg) {
211                 log->wrap = DEFAULT_WRAPLEN;
212                 log->in1 = DEFAULT_INDENT1;
213                 log->in2 = DEFAULT_INDENT2;
214                 return 0;
215         }
216
217         log->wrap = parse_uint(&arg, ',', DEFAULT_WRAPLEN);
218         log->in1 = parse_uint(&arg, ',', DEFAULT_INDENT1);
219         log->in2 = parse_uint(&arg, '\0', DEFAULT_INDENT2);
220         if (log->wrap < 0 || log->in1 < 0 || log->in2 < 0)
221                 return error(wrap_arg_usage);
222         if (log->wrap &&
223             ((log->in1 && log->wrap <= log->in1) ||
224              (log->in2 && log->wrap <= log->in2)))
225                 return error(wrap_arg_usage);
226         return 0;
227 }
228
229 void shortlog_init(struct shortlog *log)
230 {
231         memset(log, 0, sizeof(*log));
232
233         read_mailmap(&log->mailmap, &log->common_repo_prefix);
234
235         log->list.strdup_strings = 1;
236         log->wrap = DEFAULT_WRAPLEN;
237         log->in1 = DEFAULT_INDENT1;
238         log->in2 = DEFAULT_INDENT2;
239 }
240
241 int cmd_shortlog(int argc, const char **argv, const char *prefix)
242 {
243         struct shortlog log = { STRING_LIST_INIT_NODUP };
244         struct rev_info rev;
245         int nongit = !startup_info->have_repository;
246
247         const struct option options[] = {
248                 OPT_BOOL('c', "committer", &log.committer,
249                          N_("Group by committer rather than author")),
250                 OPT_BOOL('n', "numbered", &log.sort_by_number,
251                          N_("sort output according to the number of commits per author")),
252                 OPT_BOOL('s', "summary", &log.summary,
253                          N_("Suppress commit descriptions, only provides commit count")),
254                 OPT_BOOL('e', "email", &log.email,
255                          N_("Show the email address of each author")),
256                 { OPTION_CALLBACK, 'w', NULL, &log, N_("w[,i1[,i2]]"),
257                         N_("Linewrap output"), PARSE_OPT_OPTARG, &parse_wrap_args },
258                 OPT_END(),
259         };
260
261         struct parse_opt_ctx_t ctx;
262
263         git_config(git_default_config, NULL);
264         shortlog_init(&log);
265         init_revisions(&rev, prefix);
266         parse_options_start(&ctx, argc, argv, prefix, options,
267                             PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
268
269         for (;;) {
270                 switch (parse_options_step(&ctx, options, shortlog_usage)) {
271                 case PARSE_OPT_HELP:
272                         exit(129);
273                 case PARSE_OPT_DONE:
274                         goto parse_done;
275                 }
276                 parse_revision_opt(&rev, &ctx, options, shortlog_usage);
277         }
278 parse_done:
279         argc = parse_options_end(&ctx);
280
281         if (setup_revisions(argc, argv, &rev, NULL) != 1) {
282                 error(_("unrecognized argument: %s"), argv[1]);
283                 usage_with_options(shortlog_usage, options);
284         }
285
286         log.user_format = rev.commit_format == CMIT_FMT_USERFORMAT;
287         log.abbrev = rev.abbrev;
288         log.file = rev.diffopt.file;
289
290         /* assume HEAD if from a tty */
291         if (!nongit && !rev.pending.nr && isatty(0))
292                 add_head_to_pending(&rev);
293         if (rev.pending.nr == 0) {
294                 if (isatty(0))
295                         fprintf(stderr, _("(reading log message from standard input)\n"));
296                 read_from_stdin(&log);
297         }
298         else
299                 get_from_rev(&rev, &log);
300
301         shortlog_output(&log);
302         if (log.file != stdout)
303                 fclose(log.file);
304         return 0;
305 }
306
307 static void add_wrapped_shortlog_msg(struct strbuf *sb, const char *s,
308                                      const struct shortlog *log)
309 {
310         strbuf_add_wrapped_text(sb, s, log->in1, log->in2, log->wrap);
311         strbuf_addch(sb, '\n');
312 }
313
314 void shortlog_output(struct shortlog *log)
315 {
316         int i, j;
317         struct strbuf sb = STRBUF_INIT;
318
319         if (log->sort_by_number)
320                 QSORT(log->list.items, log->list.nr,
321                       log->summary ? compare_by_counter : compare_by_list);
322         for (i = 0; i < log->list.nr; i++) {
323                 const struct string_list_item *item = &log->list.items[i];
324                 if (log->summary) {
325                         fprintf(log->file, "%6d\t%s\n",
326                                 (int)UTIL_TO_INT(item), item->string);
327                 } else {
328                         struct string_list *onelines = item->util;
329                         fprintf(log->file, "%s (%d):\n",
330                                 item->string, onelines->nr);
331                         for (j = onelines->nr - 1; j >= 0; j--) {
332                                 const char *msg = onelines->items[j].string;
333
334                                 if (log->wrap_lines) {
335                                         strbuf_reset(&sb);
336                                         add_wrapped_shortlog_msg(&sb, msg, log);
337                                         fwrite(sb.buf, sb.len, 1, log->file);
338                                 }
339                                 else
340                                         fprintf(log->file, "      %s\n", msg);
341                         }
342                         putc('\n', log->file);
343                         onelines->strdup_strings = 1;
344                         string_list_clear(onelines, 0);
345                         free(onelines);
346                 }
347
348                 log->list.items[i].util = NULL;
349         }
350
351         strbuf_release(&sb);
352         log->list.strdup_strings = 1;
353         string_list_clear(&log->list, 1);
354         clear_mailmap(&log->mailmap);
355 }