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