builtin-shortlog.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "commit.h"
   4 #include "diff.h"
   5 #include "path-list.h"
   6 #include "revision.h"
   7 #include <string.h>
   8
   9 static const char shortlog_usage[] =
  10 "git-shortlog [-n] [-s] [<commit-id>... ]";
  11
  12 static int compare_by_number(const void *a1, const void *a2)
  13 {
  14         const struct path_list_item *i1 = a1, *i2 = a2;
  15         const struct path_list *l1 = i1->util, *l2 = i2->util;
  16
  17         if (l1->nr < l2->nr)
  18                 return 1;
  19         else if (l1->nr == l2->nr)
  20                 return 0;
  21         else
  22                 return -1;
  23 }
  24
  25 static struct path_list mailmap = {NULL, 0, 0, 0};
  26
  27 static int read_mailmap(const char *filename)
  28 {
  29         char buffer[1024];
  30         FILE *f = fopen(filename, "r");
  31
  32         if (f == NULL)
  33                 return 1;
  34         while (fgets(buffer, sizeof(buffer), f) != NULL) {
  35                 char *end_of_name, *left_bracket, *right_bracket;
  36                 char *name, *email;
  37                 int i;
  38                 if (buffer[0] == '#')
  39                         continue;
  40                 if ((left_bracket = strchr(buffer, '<')) == NULL)
  41                         continue;
  42                 if ((right_bracket = strchr(left_bracket + 1, '>')) == NULL)
  43                         continue;
  44                 if (right_bracket == left_bracket + 1)
  45                         continue;
  46                 for (end_of_name = left_bracket; end_of_name != buffer
  47                                 && isspace(end_of_name[-1]); end_of_name--)
  48                         /* keep on looking */
  49                 if (end_of_name == buffer)
  50                         continue;
  51                 name = xmalloc(end_of_name - buffer + 1);
  52                 strlcpy(name, buffer, end_of_name - buffer + 1);
  53                 email = xmalloc(right_bracket - left_bracket);
  54                 for (i = 0; i < right_bracket - left_bracket - 1; i++)
  55                         email[i] = tolower(left_bracket[i + 1]);
  56                 email[right_bracket - left_bracket - 1] = '\0';
  57                 path_list_insert(email, &mailmap)->util = name;
  58         }
  59         fclose(f);
  60         return 0;
  61 }
  62
  63 static int map_email(char *email, char *name, int maxlen)
  64 {
  65         char *p;
  66         struct path_list_item *item;
  67
  68         /* autocomplete common developers */
  69         p = strchr(email, '>');
  70         if (!p)
  71                 return 0;
  72
  73         *p = '\0';
  74         /* downcase the email address */
  75         for (p = email; *p; p++)
  76                 *p = tolower(*p);
  77         item = path_list_lookup(email, &mailmap);
  78         if (item != NULL) {
  79                 const char *realname = (const char *)item->util;
  80                 strncpy(name, realname, maxlen);
  81                 return 1;
  82         }
  83         return 0;
  84 }
  85
  86 static void insert_author_oneline(struct path_list *list,
  87                 const char *author, int authorlen,
  88                 const char *oneline, int onelinelen)
  89 {
  90         const char *dot3 = "/pub/scm/linux/kernel/git/";
  91         char *buffer, *p;
  92         struct path_list_item *item;
  93         struct path_list *onelines;
  94
  95         while (authorlen > 0 && isspace(author[authorlen - 1]))
  96                 authorlen--;
  97
  98         buffer = xmalloc(authorlen + 1);
  99         memcpy(buffer, author, authorlen);
 100         buffer[authorlen] = '\0';
 101
 102         item = path_list_insert(buffer, list);
 103         if (item->util == NULL)
 104                 item->util = xcalloc(1, sizeof(struct path_list));
 105         else
 106                 free(buffer);
 107
 108         if (!strncmp(oneline, "[PATCH", 6)) {
 109                 char *eob = strchr(oneline, ']');
 110
 111                 if (eob) {
 112                         while (isspace(eob[1]) && eob[1] != '\n')
 113                                 eob++;
 114                         if (eob - oneline < onelinelen) {
 115                                 onelinelen -= eob - oneline;
 116                                 oneline = eob;
 117                         }
 118                 }
 119         }
 120
 121         while (onelinelen > 0 && isspace(oneline[0])) {
 122                 oneline++;
 123                 onelinelen--;
 124         }
 125
 126         while (onelinelen > 0 && isspace(oneline[onelinelen - 1]))
 127                 onelinelen--;
 128
 129         buffer = xmalloc(onelinelen + 1);
 130         memcpy(buffer, oneline, onelinelen);
 131         buffer[onelinelen] = '\0';
 132
 133         if (dot3) {
 134                 int dot3len = strlen(dot3);
 135                 if (dot3len > 5) {
 136                         while ((p = strstr(buffer, dot3)) != NULL) {
 137                                 int taillen = strlen(p) - dot3len;
 138                                 memcpy(p, "/.../", 5);
 139                                 memmove(p + 5, p + dot3len, taillen + 1);
 140                         }
 141                 }
 142         }
 143
 144         onelines = item->util;
 145         if (onelines->nr >= onelines->alloc) {
 146                 onelines->alloc = alloc_nr(onelines->nr);
 147                 onelines->items = xrealloc(onelines->items,
 148                                 onelines->alloc
 149                                 * sizeof(struct path_list_item));
 150         }
 151
 152         onelines->items[onelines->nr].util = NULL;
 153         onelines->items[onelines->nr++].path = buffer;
 154 }
 155
 156 static void read_from_stdin(struct path_list *list)
 157 {
 158         char buffer[1024];
 159
 160         while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
 161                 char *bob;
 162                 if ((buffer[0] == 'A' || buffer[0] == 'a') &&
 163                                 !strncmp(buffer + 1, "uthor: ", 7) &&
 164                                 (bob = strchr(buffer + 7, '<')) != NULL) {
 165                         char buffer2[1024], offset = 0;
 166
 167                         if (map_email(bob + 1, buffer, sizeof(buffer)))
 168                                 bob = buffer + strlen(buffer);
 169                         else {
 170                                 offset = 8;
 171                                 while (isspace(bob[-1]))
 172                                         bob--;
 173                         }
 174
 175                         while (fgets(buffer2, sizeof(buffer2), stdin) &&
 176                                         buffer2[0] != '\n')
 177                                 ; /* chomp input */
 178                         if (fgets(buffer2, sizeof(buffer2), stdin))
 179                                 insert_author_oneline(list,
 180                                                 buffer + offset,
 181                                                 bob - buffer - offset,
 182                                                 buffer2, strlen(buffer2));
 183                 }
 184         }
 185 }
 186
 187 static void get_from_rev(struct rev_info *rev, struct path_list *list)
 188 {
 189         char scratch[1024];
 190         struct commit *commit;
 191
 192         prepare_revision_walk(rev);
 193         while ((commit = get_revision(rev)) != NULL) {
 194                 char *author = NULL, *oneline, *buffer;
 195                 int authorlen = authorlen, onelinelen;
 196
 197                 /* get author and oneline */
 198                 for (buffer = commit->buffer; buffer && *buffer != '\0' &&
 199                                 *buffer != '\n'; ) {
 200                         char *eol = strchr(buffer, '\n');
 201
 202                         if (eol == NULL)
 203                                 eol = buffer + strlen(buffer);
 204                         else
 205                                 eol++;
 206
 207                         if (!strncmp(buffer, "author ", 7)) {
 208                                 char *bracket = strchr(buffer, '<');
 209
 210                                 if (bracket == NULL || bracket > eol)
 211                                         die("Invalid commit buffer: %s",
 212                                             sha1_to_hex(commit->object.sha1));
 213
 214                                 if (map_email(bracket + 1, scratch,
 215                                                         sizeof(scratch))) {
 216                                         author = scratch;
 217                                         authorlen = strlen(scratch);
 218                                 } else {
 219                                         while (bracket[-1] == ' ')
 220                                                 bracket--;
 221
 222                                         author = buffer + 7;
 223                                         authorlen = bracket - buffer - 7;
 224                                 }
 225                         }
 226                         buffer = eol;
 227                 }
 228
 229                 if (author == NULL)
 230                         die ("Missing author: %s",
 231                                         sha1_to_hex(commit->object.sha1));
 232
 233                 if (buffer == NULL || *buffer == '\0') {
 234                         oneline = "<none>";
 235                         onelinelen = sizeof(oneline) + 1;
 236                 } else {
 237                         char *eol;
 238
 239                         oneline = buffer + 1;
 240                         eol = strchr(oneline, '\n');
 241                         if (eol == NULL)
 242                                 onelinelen = strlen(oneline);
 243                         else
 244                                 onelinelen = eol - oneline;
 245                 }
 246
 247                 insert_author_oneline(list,
 248                                 author, authorlen, oneline, onelinelen);
 249         }
 250
 251 }
 252
 253 int cmd_shortlog(int argc, const char **argv, const char *prefix)
 254 {
 255         struct rev_info rev;
 256         struct path_list list = { NULL, 0, 0, 1 };
 257         int i, j, sort_by_number = 0, summary = 0;
 258
 259         /* since -n is a shadowed rev argument, parse our args first */
 260         while (argc > 1) {
 261                 if (!strcmp(argv[1], "-n") || !strcmp(argv[1], "--numbered"))
 262                         sort_by_number = 1;
 263                 else if (!strcmp(argv[1], "-s") ||
 264                                 !strcmp(argv[1], "--summary"))
 265                         summary = 1;
 266                 else if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
 267                         usage(shortlog_usage);
 268                 else
 269                         break;
 270                 argv++;
 271                 argc--;
 272         }
 273         init_revisions(&rev, prefix);
 274         argc = setup_revisions(argc, argv, &rev, NULL);
 275         if (argc > 1)
 276                 die ("unrecognized argument: %s", argv[1]);
 277
 278         if (!access(".mailmap", R_OK))
 279                 read_mailmap(".mailmap");
 280
 281         if (rev.pending.nr == 1)
 282                 die ("Need a range!");
 283         else if (rev.pending.nr == 0)
 284                 read_from_stdin(&list);
 285         else
 286                 get_from_rev(&rev, &list);
 287
 288         if (sort_by_number)
 289                 qsort(list.items, list.nr, sizeof(struct path_list_item),
 290                         compare_by_number);
 291
 292         for (i = 0; i < list.nr; i++) {
 293                 struct path_list *onelines = list.items[i].util;
 294
 295                 if (summary) {
 296                         printf("%s: %d\n", list.items[i].path, onelines->nr);
 297                 } else {
 298                         printf("%s (%d):\n", list.items[i].path, onelines->nr);
 299                         for (j = onelines->nr - 1; j >= 0; j--)
 300                                 printf("      %s\n", onelines->items[j].path);
 301                         printf("\n");
 302                 }
 303
 304                 onelines->strdup_paths = 1;
 305                 path_list_clear(onelines, 1);
 306                 free(onelines);
 307                 list.items[i].util = NULL;
 308         }
 309
 310         list.strdup_paths = 1;
 311         path_list_clear(&list, 1);
 312         mailmap.strdup_paths = 1;
 313         path_list_clear(&mailmap, 1);
 314
 315         return 0;
 316 }
 317