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 }