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         N_("git log --pretty=short | git shortlog [<options>]"),
  16         NULL
  17 };
  18
  19 /*
  20  * The util field of our string_list_items will contain one of two things:
  21  *
  22  *   - if --summary is not in use, it will point to a string list of the
  23  *     oneline subjects assigned to this author
  24  *
  25  *   - if --summary is in use, we don't need that list; we only need to know
  26  *     its size. So we abuse the pointer slot to store our integer counter.
  27  *
  28  *  This macro accesses the latter.
  29  */
  30 #define UTIL_TO_INT(x) ((intptr_t)(x)->util)
  31
  32 static int compare_by_counter(const void *a1, const void *a2)
  33 {
  34         const struct string_list_item *i1 = a1, *i2 = a2;
  35         return UTIL_TO_INT(i2) - UTIL_TO_INT(i1);
  36 }
  37
  38 static int compare_by_list(const void *a1, const void *a2)
  39 {
  40         const struct string_list_item *i1 = a1, *i2 = a2;
  41         const struct string_list *l1 = i1->util, *l2 = i2->util;
  42
  43         if (l1->nr < l2->nr)
  44                 return 1;
  45         else if (l1->nr == l2->nr)
  46                 return 0;
  47         else
  48                 return -1;
  49 }
  50
  51 static void insert_one_record(struct shortlog *log,
  52                               const char *author,
  53                               const char *oneline)
  54 {
  55         struct string_list_item *item;
  56
  57         item = string_list_insert(&log->list, author);
  58
  59         if (log->summary)
  60                 item->util = (void *)(UTIL_TO_INT(item) + 1);
  61         else {
  62                 const char *dot3 = log->common_repo_prefix;
  63                 char *buffer, *p;
  64                 struct strbuf subject = STRBUF_INIT;
  65                 const char *eol;
  66
  67                 /* Skip any leading whitespace, including any blank lines. */
  68                 while (*oneline && isspace(*oneline))
  69                         oneline++;
  70                 eol = strchr(oneline, '\n');
  71                 if (!eol)
  72                         eol = oneline + strlen(oneline);
  73                 if (starts_with(oneline, "[PATCH")) {
  74                         char *eob = strchr(oneline, ']');
  75                         if (eob && (!eol || eob < eol))
  76                                 oneline = eob + 1;
  77                 }
  78                 while (*oneline && isspace(*oneline) && *oneline != '\n')
  79                         oneline++;
  80                 format_subject(&subject, oneline, " ");
  81                 buffer = strbuf_detach(&subject, NULL);
  82
  83                 if (dot3) {
  84                         int dot3len = strlen(dot3);
  85                         if (dot3len > 5) {
  86                                 while ((p = strstr(buffer, dot3)) != NULL) {
  87                                         int taillen = strlen(p) - dot3len;
  88                                         memcpy(p, "/.../", 5);
  89                                         memmove(p + 5, p + dot3len, taillen + 1);
  90                                 }
  91                         }
  92                 }
  93
  94                 if (item->util == NULL)
  95                         item->util = xcalloc(1, sizeof(struct string_list));
  96                 string_list_append(item->util, buffer);
  97         }
  98 }
  99
 100 static int parse_stdin_author(struct shortlog *log,
 101                                struct strbuf *out, const char *in)
 102 {
 103         const char *mailbuf, *namebuf;
 104         size_t namelen, maillen;
 105         struct ident_split ident;
 106
 107         if (split_ident_line(&ident, in, strlen(in)))
 108                 return -1;
 109
 110         namebuf = ident.name_begin;
 111         mailbuf = ident.mail_begin;
 112         namelen = ident.name_end - ident.name_begin;
 113         maillen = ident.mail_end - ident.mail_begin;
 114
 115         map_user(&log->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
 116         strbuf_add(out, namebuf, namelen);
 117         if (log->email)
 118                 strbuf_addf(out, " <%.*s>", (int)maillen, mailbuf);
 119
 120         return 0;
 121 }
 122
 123 static void read_from_stdin(struct shortlog *log)
 124 {
 125         struct strbuf author = STRBUF_INIT;
 126         struct strbuf mapped_author = STRBUF_INIT;
 127         struct strbuf oneline = STRBUF_INIT;
 128         static const char *author_match[2] = { "Author: ", "author " };
 129         static const char *committer_match[2] = { "Commit: ", "committer " };
 130         const char **match;
 131
 132         match = log->committer ? committer_match : author_match;
 133         while (strbuf_getline_lf(&author, stdin) != EOF) {
 134                 const char *v;
 135                 if (!skip_prefix(author.buf, match[0], &v) &&
 136                     !skip_prefix(author.buf, match[1], &v))
 137                         continue;
 138                 while (strbuf_getline_lf(&oneline, stdin) != EOF &&
 139                        oneline.len)
 140                         ; /* discard headers */
 141                 while (strbuf_getline_lf(&oneline, stdin) != EOF &&
 142                        !oneline.len)
 143                         ; /* discard blanks */
 144
 145                 strbuf_reset(&mapped_author);
 146                 if (parse_stdin_author(log, &mapped_author, v) < 0)
 147                         continue;
 148
 149                 insert_one_record(log, mapped_author.buf, oneline.buf);
 150         }
 151         strbuf_release(&author);
 152         strbuf_release(&mapped_author);
 153         strbuf_release(&oneline);
 154 }
 155
 156 void shortlog_add_commit(struct shortlog *log, struct commit *commit)
 157 {
 158         struct strbuf author = STRBUF_INIT;
 159         struct strbuf oneline = STRBUF_INIT;
 160         struct pretty_print_context ctx = {0};
 161         const char *fmt;
 162
 163         ctx.fmt = CMIT_FMT_USERFORMAT;
 164         ctx.abbrev = log->abbrev;
 165         ctx.print_email_subject = 1;
 166         ctx.date_mode.type = DATE_NORMAL;
 167         ctx.output_encoding = get_log_output_encoding();
 168
 169         fmt = log->committer ?
 170                 (log->email ? "%cN <%cE>" : "%cN") :
 171                 (log->email ? "%aN <%aE>" : "%aN");
 172
 173         format_commit_message(commit, fmt, &author, &ctx);
 174         if (!log->summary) {
 175                 if (log->user_format)
 176                         pretty_print_commit(&ctx, commit, &oneline);
 177                 else
 178                         format_commit_message(commit, "%s", &oneline, &ctx);
 179         }
 180
 181         insert_one_record(log, author.buf, oneline.len ? oneline.buf : "<none>");
 182
 183         strbuf_release(&author);
 184         strbuf_release(&oneline);
 185 }
 186
 187 static void get_from_rev(struct rev_info *rev, struct shortlog *log)
 188 {
 189         struct commit *commit;
 190
 191         if (prepare_revision_walk(rev))
 192                 die(_("revision walk setup failed"));
 193         while ((commit = get_revision(rev)) != NULL)
 194                 shortlog_add_commit(log, commit);
 195 }
 196
 197 static int parse_uint(char const **arg, int comma, int defval)
 198 {
 199         unsigned long ul;
 200         int ret;
 201         char *endp;
 202
 203         ul = strtoul(*arg, &endp, 10);
 204         if (*endp && *endp != comma)
 205                 return -1;
 206         if (ul > INT_MAX)
 207                 return -1;
 208         ret = *arg == endp ? defval : (int)ul;
 209         *arg = *endp ? endp + 1 : endp;
 210         return ret;
 211 }
 212
 213 static const char wrap_arg_usage[] = "-w[<width>[,<indent1>[,<indent2>]]]";
 214 #define DEFAULT_WRAPLEN 76
 215 #define DEFAULT_INDENT1 6
 216 #define DEFAULT_INDENT2 9
 217
 218 static int parse_wrap_args(const struct option *opt, const char *arg, int unset)
 219 {
 220         struct shortlog *log = opt->value;
 221
 222         log->wrap_lines = !unset;
 223         if (unset)
 224                 return 0;
 225         if (!arg) {
 226                 log->wrap = DEFAULT_WRAPLEN;
 227                 log->in1 = DEFAULT_INDENT1;
 228                 log->in2 = DEFAULT_INDENT2;
 229                 return 0;
 230         }
 231
 232         log->wrap = parse_uint(&arg, ',', DEFAULT_WRAPLEN);
 233         log->in1 = parse_uint(&arg, ',', DEFAULT_INDENT1);
 234         log->in2 = parse_uint(&arg, '\0', DEFAULT_INDENT2);
 235         if (log->wrap < 0 || log->in1 < 0 || log->in2 < 0)
 236                 return error(wrap_arg_usage);
 237         if (log->wrap &&
 238             ((log->in1 && log->wrap <= log->in1) ||
 239              (log->in2 && log->wrap <= log->in2)))
 240                 return error(wrap_arg_usage);
 241         return 0;
 242 }
 243
 244 void shortlog_init(struct shortlog *log)
 245 {
 246         memset(log, 0, sizeof(*log));
 247
 248         read_mailmap(&log->mailmap, &log->common_repo_prefix);
 249
 250         log->list.strdup_strings = 1;
 251         log->wrap = DEFAULT_WRAPLEN;
 252         log->in1 = DEFAULT_INDENT1;
 253         log->in2 = DEFAULT_INDENT2;
 254 }
 255
 256 int cmd_shortlog(int argc, const char **argv, const char *prefix)
 257 {
 258         struct shortlog log = { STRING_LIST_INIT_NODUP };
 259         struct rev_info rev;
 260         int nongit = !startup_info->have_repository;
 261
 262         const struct option options[] = {
 263                 OPT_BOOL('c', "committer", &log.committer,
 264                          N_("Group by committer rather than author")),
 265                 OPT_BOOL('n', "numbered", &log.sort_by_number,
 266                          N_("sort output according to the number of commits per author")),
 267                 OPT_BOOL('s', "summary", &log.summary,
 268                          N_("Suppress commit descriptions, only provides commit count")),
 269                 OPT_BOOL('e', "email", &log.email,
 270                          N_("Show the email address of each author")),
 271                 { OPTION_CALLBACK, 'w', NULL, &log, N_("w[,i1[,i2]]"),
 272                         N_("Linewrap output"), PARSE_OPT_OPTARG, &parse_wrap_args },
 273                 OPT_END(),
 274         };
 275
 276         struct parse_opt_ctx_t ctx;
 277
 278         git_config(git_default_config, NULL);
 279         shortlog_init(&log);
 280         init_revisions(&rev, prefix);
 281         parse_options_start(&ctx, argc, argv, prefix, options,
 282                             PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
 283
 284         for (;;) {
 285                 switch (parse_options_step(&ctx, options, shortlog_usage)) {
 286                 case PARSE_OPT_HELP:
 287                 case PARSE_OPT_ERROR:
 288                         exit(129);
 289                 case PARSE_OPT_DONE:
 290                         goto parse_done;
 291                 }
 292                 parse_revision_opt(&rev, &ctx, options, shortlog_usage);
 293         }
 294 parse_done:
 295         argc = parse_options_end(&ctx);
 296
 297         if (nongit && argc > 1) {
 298                 error(_("too many arguments given outside repository"));
 299                 usage_with_options(shortlog_usage, options);
 300         }
 301
 302         if (setup_revisions(argc, argv, &rev, NULL) != 1) {
 303                 error(_("unrecognized argument: %s"), argv[1]);
 304                 usage_with_options(shortlog_usage, options);
 305         }
 306
 307         log.user_format = rev.commit_format == CMIT_FMT_USERFORMAT;
 308         log.abbrev = rev.abbrev;
 309         log.file = rev.diffopt.file;
 310
 311         /* assume HEAD if from a tty */
 312         if (!nongit && !rev.pending.nr && isatty(0))
 313                 add_head_to_pending(&rev);
 314         if (rev.pending.nr == 0) {
 315                 if (isatty(0))
 316                         fprintf(stderr, _("(reading log message from standard input)\n"));
 317                 read_from_stdin(&log);
 318         }
 319         else
 320                 get_from_rev(&rev, &log);
 321
 322         shortlog_output(&log);
 323         if (log.file != stdout)
 324                 fclose(log.file);
 325         return 0;
 326 }
 327
 328 static void add_wrapped_shortlog_msg(struct strbuf *sb, const char *s,
 329                                      const struct shortlog *log)
 330 {
 331         strbuf_add_wrapped_text(sb, s, log->in1, log->in2, log->wrap);
 332         strbuf_addch(sb, '\n');
 333 }
 334
 335 void shortlog_output(struct shortlog *log)
 336 {
 337         int i, j;
 338         struct strbuf sb = STRBUF_INIT;
 339
 340         if (log->sort_by_number)
 341                 QSORT(log->list.items, log->list.nr,
 342                       log->summary ? compare_by_counter : compare_by_list);
 343         for (i = 0; i < log->list.nr; i++) {
 344                 const struct string_list_item *item = &log->list.items[i];
 345                 if (log->summary) {
 346                         fprintf(log->file, "%6d\t%s\n",
 347                                 (int)UTIL_TO_INT(item), item->string);
 348                 } else {
 349                         struct string_list *onelines = item->util;
 350                         fprintf(log->file, "%s (%d):\n",
 351                                 item->string, onelines->nr);
 352                         for (j = onelines->nr - 1; j >= 0; j--) {
 353                                 const char *msg = onelines->items[j].string;
 354
 355                                 if (log->wrap_lines) {
 356                                         strbuf_reset(&sb);
 357                                         add_wrapped_shortlog_msg(&sb, msg, log);
 358                                         fwrite(sb.buf, sb.len, 1, log->file);
 359                                 }
 360                                 else
 361                                         fprintf(log->file, "      %s\n", msg);
 362                         }
 363                         putc('\n', log->file);
 364                         onelines->strdup_strings = 1;
 365                         string_list_clear(onelines, 0);
 366                         free(onelines);
 367                 }
 368
 369                 log->list.items[i].util = NULL;
 370         }
 371
 372         strbuf_release(&sb);
 373         log->list.strdup_strings = 1;
 374         string_list_clear(&log->list, 1);
 375         clear_mailmap(&log->mailmap);
 376 }