Merge branch 'jx/do-not-crash-receive-pack-wo-head'
[git] / builtin / shortlog.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "commit.h"
4 #include "diff.h"
5 #include "string-list.h"
6 #include "revision.h"
7 #include "utf8.h"
8 #include "mailmap.h"
9 #include "shortlog.h"
10 #include "parse-options.h"
11
12 static char const * const shortlog_usage[] = {
13         N_("git shortlog [<options>] [<revision-range>] [[--] [<path>...]]"),
14         NULL
15 };
16
17 static int compare_by_number(const void *a1, const void *a2)
18 {
19         const struct string_list_item *i1 = a1, *i2 = a2;
20         const struct string_list *l1 = i1->util, *l2 = i2->util;
21
22         if (l1->nr < l2->nr)
23                 return 1;
24         else if (l1->nr == l2->nr)
25                 return 0;
26         else
27                 return -1;
28 }
29
30 static void insert_one_record(struct shortlog *log,
31                               const char *author,
32                               const char *oneline)
33 {
34         const char *dot3 = log->common_repo_prefix;
35         char *buffer, *p;
36         struct string_list_item *item;
37         const char *mailbuf, *namebuf;
38         size_t namelen, maillen;
39         const char *eol;
40         struct strbuf subject = STRBUF_INIT;
41         struct strbuf namemailbuf = STRBUF_INIT;
42         struct ident_split ident;
43
44         if (split_ident_line(&ident, author, strlen(author)))
45                 return;
46
47         namebuf = ident.name_begin;
48         mailbuf = ident.mail_begin;
49         namelen = ident.name_end - ident.name_begin;
50         maillen = ident.mail_end - ident.mail_begin;
51
52         map_user(&log->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
53         strbuf_add(&namemailbuf, namebuf, namelen);
54
55         if (log->email)
56                 strbuf_addf(&namemailbuf, " <%.*s>", (int)maillen, mailbuf);
57
58         item = string_list_insert(&log->list, namemailbuf.buf);
59         if (item->util == NULL)
60                 item->util = xcalloc(1, sizeof(struct string_list));
61
62         /* Skip any leading whitespace, including any blank lines. */
63         while (*oneline && isspace(*oneline))
64                 oneline++;
65         eol = strchr(oneline, '\n');
66         if (!eol)
67                 eol = oneline + strlen(oneline);
68         if (starts_with(oneline, "[PATCH")) {
69                 char *eob = strchr(oneline, ']');
70                 if (eob && (!eol || eob < eol))
71                         oneline = eob + 1;
72         }
73         while (*oneline && isspace(*oneline) && *oneline != '\n')
74                 oneline++;
75         format_subject(&subject, oneline, " ");
76         buffer = strbuf_detach(&subject, NULL);
77
78         if (dot3) {
79                 int dot3len = strlen(dot3);
80                 if (dot3len > 5) {
81                         while ((p = strstr(buffer, dot3)) != NULL) {
82                                 int taillen = strlen(p) - dot3len;
83                                 memcpy(p, "/.../", 5);
84                                 memmove(p + 5, p + dot3len, taillen + 1);
85                         }
86                 }
87         }
88
89         string_list_append(item->util, buffer);
90 }
91
92 static void read_from_stdin(struct shortlog *log)
93 {
94         char author[1024], oneline[1024];
95
96         while (fgets(author, sizeof(author), stdin) != NULL) {
97                 if (!(author[0] == 'A' || author[0] == 'a') ||
98                     !starts_with(author + 1, "uthor: "))
99                         continue;
100                 while (fgets(oneline, sizeof(oneline), stdin) &&
101                        oneline[0] != '\n')
102                         ; /* discard headers */
103                 while (fgets(oneline, sizeof(oneline), stdin) &&
104                        oneline[0] == '\n')
105                         ; /* discard blanks */
106                 insert_one_record(log, author + 8, oneline);
107         }
108 }
109
110 void shortlog_add_commit(struct shortlog *log, struct commit *commit)
111 {
112         const char *author = NULL, *buffer;
113         struct strbuf buf = STRBUF_INIT;
114         struct strbuf ufbuf = STRBUF_INIT;
115
116         pp_commit_easy(CMIT_FMT_RAW, commit, &buf);
117         buffer = buf.buf;
118         while (*buffer && *buffer != '\n') {
119                 const char *eol = strchr(buffer, '\n');
120
121                 if (eol == NULL)
122                         eol = buffer + strlen(buffer);
123                 else
124                         eol++;
125
126                 if (starts_with(buffer, "author "))
127                         author = buffer + 7;
128                 buffer = eol;
129         }
130         if (!author) {
131                 warning(_("Missing author: %s"),
132                     sha1_to_hex(commit->object.sha1));
133                 return;
134         }
135         if (log->user_format) {
136                 struct pretty_print_context ctx = {0};
137                 ctx.fmt = CMIT_FMT_USERFORMAT;
138                 ctx.abbrev = log->abbrev;
139                 ctx.subject = "";
140                 ctx.after_subject = "";
141                 ctx.date_mode.type = DATE_NORMAL;
142                 ctx.output_encoding = get_log_output_encoding();
143                 pretty_print_commit(&ctx, commit, &ufbuf);
144                 buffer = ufbuf.buf;
145         } else if (*buffer) {
146                 buffer++;
147         }
148         insert_one_record(log, author, !*buffer ? "<none>" : buffer);
149         strbuf_release(&ufbuf);
150         strbuf_release(&buf);
151 }
152
153 static void get_from_rev(struct rev_info *rev, struct shortlog *log)
154 {
155         struct commit *commit;
156
157         if (prepare_revision_walk(rev))
158                 die(_("revision walk setup failed"));
159         while ((commit = get_revision(rev)) != NULL)
160                 shortlog_add_commit(log, commit);
161 }
162
163 static int parse_uint(char const **arg, int comma, int defval)
164 {
165         unsigned long ul;
166         int ret;
167         char *endp;
168
169         ul = strtoul(*arg, &endp, 10);
170         if (*endp && *endp != comma)
171                 return -1;
172         if (ul > INT_MAX)
173                 return -1;
174         ret = *arg == endp ? defval : (int)ul;
175         *arg = *endp ? endp + 1 : endp;
176         return ret;
177 }
178
179 static const char wrap_arg_usage[] = "-w[<width>[,<indent1>[,<indent2>]]]";
180 #define DEFAULT_WRAPLEN 76
181 #define DEFAULT_INDENT1 6
182 #define DEFAULT_INDENT2 9
183
184 static int parse_wrap_args(const struct option *opt, const char *arg, int unset)
185 {
186         struct shortlog *log = opt->value;
187
188         log->wrap_lines = !unset;
189         if (unset)
190                 return 0;
191         if (!arg) {
192                 log->wrap = DEFAULT_WRAPLEN;
193                 log->in1 = DEFAULT_INDENT1;
194                 log->in2 = DEFAULT_INDENT2;
195                 return 0;
196         }
197
198         log->wrap = parse_uint(&arg, ',', DEFAULT_WRAPLEN);
199         log->in1 = parse_uint(&arg, ',', DEFAULT_INDENT1);
200         log->in2 = parse_uint(&arg, '\0', DEFAULT_INDENT2);
201         if (log->wrap < 0 || log->in1 < 0 || log->in2 < 0)
202                 return error(wrap_arg_usage);
203         if (log->wrap &&
204             ((log->in1 && log->wrap <= log->in1) ||
205              (log->in2 && log->wrap <= log->in2)))
206                 return error(wrap_arg_usage);
207         return 0;
208 }
209
210 void shortlog_init(struct shortlog *log)
211 {
212         memset(log, 0, sizeof(*log));
213
214         read_mailmap(&log->mailmap, &log->common_repo_prefix);
215
216         log->list.strdup_strings = 1;
217         log->wrap = DEFAULT_WRAPLEN;
218         log->in1 = DEFAULT_INDENT1;
219         log->in2 = DEFAULT_INDENT2;
220 }
221
222 int cmd_shortlog(int argc, const char **argv, const char *prefix)
223 {
224         static struct shortlog log;
225         static struct rev_info rev;
226         int nongit = !startup_info->have_repository;
227
228         static const struct option options[] = {
229                 OPT_BOOL('n', "numbered", &log.sort_by_number,
230                          N_("sort output according to the number of commits per author")),
231                 OPT_BOOL('s', "summary", &log.summary,
232                          N_("Suppress commit descriptions, only provides commit count")),
233                 OPT_BOOL('e', "email", &log.email,
234                          N_("Show the email address of each author")),
235                 { OPTION_CALLBACK, 'w', NULL, &log, N_("w[,i1[,i2]]"),
236                         N_("Linewrap output"), PARSE_OPT_OPTARG, &parse_wrap_args },
237                 OPT_END(),
238         };
239
240         struct parse_opt_ctx_t ctx;
241
242         git_config(git_default_config, NULL);
243         shortlog_init(&log);
244         init_revisions(&rev, prefix);
245         parse_options_start(&ctx, argc, argv, prefix, options,
246                             PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
247
248         for (;;) {
249                 switch (parse_options_step(&ctx, options, shortlog_usage)) {
250                 case PARSE_OPT_HELP:
251                         exit(129);
252                 case PARSE_OPT_DONE:
253                         goto parse_done;
254                 }
255                 parse_revision_opt(&rev, &ctx, options, shortlog_usage);
256         }
257 parse_done:
258         argc = parse_options_end(&ctx);
259
260         if (setup_revisions(argc, argv, &rev, NULL) != 1) {
261                 error(_("unrecognized argument: %s"), argv[1]);
262                 usage_with_options(shortlog_usage, options);
263         }
264
265         log.user_format = rev.commit_format == CMIT_FMT_USERFORMAT;
266         log.abbrev = rev.abbrev;
267
268         /* assume HEAD if from a tty */
269         if (!nongit && !rev.pending.nr && isatty(0))
270                 add_head_to_pending(&rev);
271         if (rev.pending.nr == 0) {
272                 if (isatty(0))
273                         fprintf(stderr, _("(reading log message from standard input)\n"));
274                 read_from_stdin(&log);
275         }
276         else
277                 get_from_rev(&rev, &log);
278
279         shortlog_output(&log);
280         return 0;
281 }
282
283 static void add_wrapped_shortlog_msg(struct strbuf *sb, const char *s,
284                                      const struct shortlog *log)
285 {
286         strbuf_add_wrapped_text(sb, s, log->in1, log->in2, log->wrap);
287         strbuf_addch(sb, '\n');
288 }
289
290 void shortlog_output(struct shortlog *log)
291 {
292         int i, j;
293         struct strbuf sb = STRBUF_INIT;
294
295         if (log->sort_by_number)
296                 qsort(log->list.items, log->list.nr, sizeof(struct string_list_item),
297                         compare_by_number);
298         for (i = 0; i < log->list.nr; i++) {
299                 struct string_list *onelines = log->list.items[i].util;
300
301                 if (log->summary) {
302                         printf("%6d\t%s\n", onelines->nr, log->list.items[i].string);
303                 } else {
304                         printf("%s (%d):\n", log->list.items[i].string, onelines->nr);
305                         for (j = onelines->nr - 1; j >= 0; j--) {
306                                 const char *msg = onelines->items[j].string;
307
308                                 if (log->wrap_lines) {
309                                         strbuf_reset(&sb);
310                                         add_wrapped_shortlog_msg(&sb, msg, log);
311                                         fwrite(sb.buf, sb.len, 1, stdout);
312                                 }
313                                 else
314                                         printf("      %s\n", msg);
315                         }
316                         putchar('\n');
317                 }
318
319                 onelines->strdup_strings = 1;
320                 string_list_clear(onelines, 0);
321                 free(onelines);
322                 log->list.items[i].util = NULL;
323         }
324
325         strbuf_release(&sb);
326         log->list.strdup_strings = 1;
327         string_list_clear(&log->list, 1);
328         clear_mailmap(&log->mailmap);
329 }