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 char *common_repo_prefix;
  13
  14 static int compare_by_number(const void *a1, const void *a2)
  15 {
  16         const struct path_list_item *i1 = a1, *i2 = a2;
  17         const struct path_list *l1 = i1->util, *l2 = i2->util;
  18
  19         if (l1->nr < l2->nr)
  20                 return 1;
  21         else if (l1->nr == l2->nr)
  22                 return 0;
  23         else
  24                 return -1;
  25 }
  26
  27 static struct path_list mailmap = {NULL, 0, 0, 0};
  28
  29 static int read_mailmap(const char *filename)
  30 {
  31         char buffer[1024];
  32         FILE *f = fopen(filename, "r");
  33
  34         if (f == NULL)
  35                 return 1;
  36         while (fgets(buffer, sizeof(buffer), f) != NULL) {
  37                 char *end_of_name, *left_bracket, *right_bracket;
  38                 char *name, *email;
  39                 int i;
  40                 if (buffer[0] == '#') {
  41                         static const char abbrev[] = "# repo-abbrev:";
  42                         int abblen = sizeof(abbrev) - 1;
  43                         int len = strlen(buffer);
  44
  45                         if (len && buffer[len - 1] == '\n')
  46                                 buffer[--len] = 0;
  47                         if (!strncmp(buffer, abbrev, abblen)) {
  48                                 char *cp;
  49
  50                                 if (common_repo_prefix)
  51                                         free(common_repo_prefix);
  52                                 common_repo_prefix = xmalloc(len);
  53
  54                                 for (cp = buffer + abblen; isspace(*cp); cp++)
  55                                         ; /* nothing */
  56                                 strcpy(common_repo_prefix, cp);
  57                         }
  58                         continue;
  59                 }
  60                 if ((left_bracket = strchr(buffer, '<')) == NULL)
  61                         continue;
  62                 if ((right_bracket = strchr(left_bracket + 1, '>')) == NULL)
  63                         continue;
  64                 if (right_bracket == left_bracket + 1)
  65                         continue;
  66                 for (end_of_name = left_bracket; end_of_name != buffer
  67                                 && isspace(end_of_name[-1]); end_of_name--)
  68                         /* keep on looking */
  69                 if (end_of_name == buffer)
  70                         continue;
  71                 name = xmalloc(end_of_name - buffer + 1);
  72                 strlcpy(name, buffer, end_of_name - buffer + 1);
  73                 email = xmalloc(right_bracket - left_bracket);
  74                 for (i = 0; i < right_bracket - left_bracket - 1; i++)
  75                         email[i] = tolower(left_bracket[i + 1]);
  76                 email[right_bracket - left_bracket - 1] = '\0';
  77                 path_list_insert(email, &mailmap)->util = name;
  78         }
  79         fclose(f);
  80         return 0;
  81 }
  82
  83 static int map_email(char *email, char *name, int maxlen)
  84 {
  85         char *p;
  86         struct path_list_item *item;
  87
  88         /* autocomplete common developers */
  89         p = strchr(email, '>');
  90         if (!p)
  91                 return 0;
  92
  93         *p = '\0';
  94         /* downcase the email address */
  95         for (p = email; *p; p++)
  96                 *p = tolower(*p);
  97         item = path_list_lookup(email, &mailmap);
  98         if (item != NULL) {
  99                 const char *realname = (const char *)item->util;
 100                 strncpy(name, realname, maxlen);
 101                 return 1;
 102         }
 103         return 0;
 104 }
 105
 106 static void insert_author_oneline(struct path_list *list,
 107                 const char *author, int authorlen,
 108                 const char *oneline, int onelinelen)
 109 {
 110         const char *dot3 = common_repo_prefix;
 111         char *buffer, *p;
 112         struct path_list_item *item;
 113         struct path_list *onelines;
 114
 115         while (authorlen > 0 && isspace(author[authorlen - 1]))
 116                 authorlen--;
 117
 118         buffer = xmalloc(authorlen + 1);
 119         memcpy(buffer, author, authorlen);
 120         buffer[authorlen] = '\0';
 121
 122         item = path_list_insert(buffer, list);
 123         if (item->util == NULL)
 124                 item->util = xcalloc(1, sizeof(struct path_list));
 125         else
 126                 free(buffer);
 127
 128         if (!strncmp(oneline, "[PATCH", 6)) {
 129                 char *eob = strchr(oneline, ']');
 130
 131                 if (eob) {
 132                         while (isspace(eob[1]) && eob[1] != '\n')
 133                                 eob++;
 134                         if (eob - oneline < onelinelen) {
 135                                 onelinelen -= eob - oneline;
 136                                 oneline = eob;
 137                         }
 138                 }
 139         }
 140
 141         while (onelinelen > 0 && isspace(oneline[0])) {
 142                 oneline++;
 143                 onelinelen--;
 144         }
 145
 146         while (onelinelen > 0 && isspace(oneline[onelinelen - 1]))
 147                 onelinelen--;
 148
 149         buffer = xmalloc(onelinelen + 1);
 150         memcpy(buffer, oneline, onelinelen);
 151         buffer[onelinelen] = '\0';
 152
 153         if (dot3) {
 154                 int dot3len = strlen(dot3);
 155                 if (dot3len > 5) {
 156                         while ((p = strstr(buffer, dot3)) != NULL) {
 157                                 int taillen = strlen(p) - dot3len;
 158                                 memcpy(p, "/.../", 5);
 159                                 memmove(p + 5, p + dot3len, taillen + 1);
 160                         }
 161                 }
 162         }
 163
 164         onelines = item->util;
 165         if (onelines->nr >= onelines->alloc) {
 166                 onelines->alloc = alloc_nr(onelines->nr);
 167                 onelines->items = xrealloc(onelines->items,
 168                                 onelines->alloc
 169                                 * sizeof(struct path_list_item));
 170         }
 171
 172         onelines->items[onelines->nr].util = NULL;
 173         onelines->items[onelines->nr++].path = buffer;
 174 }
 175
 176 static void read_from_stdin(struct path_list *list)
 177 {
 178         char buffer[1024];
 179
 180         while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
 181                 char *bob;
 182                 if ((buffer[0] == 'A' || buffer[0] == 'a') &&
 183                                 !strncmp(buffer + 1, "uthor: ", 7) &&
 184                                 (bob = strchr(buffer + 7, '<')) != NULL) {
 185                         char buffer2[1024], offset = 0;
 186
 187                         if (map_email(bob + 1, buffer, sizeof(buffer)))
 188                                 bob = buffer + strlen(buffer);
 189                         else {
 190                                 offset = 8;
 191                                 while (isspace(bob[-1]))
 192                                         bob--;
 193                         }
 194
 195                         while (fgets(buffer2, sizeof(buffer2), stdin) &&
 196                                         buffer2[0] != '\n')
 197                                 ; /* chomp input */
 198                         if (fgets(buffer2, sizeof(buffer2), stdin))
 199                                 insert_author_oneline(list,
 200                                                 buffer + offset,
 201                                                 bob - buffer - offset,
 202                                                 buffer2, strlen(buffer2));
 203                 }
 204         }
 205 }
 206
 207 static void get_from_rev(struct rev_info *rev, struct path_list *list)
 208 {
 209         char scratch[1024];
 210         struct commit *commit;
 211
 212         prepare_revision_walk(rev);
 213         while ((commit = get_revision(rev)) != NULL) {
 214                 char *author = NULL, *oneline, *buffer;
 215                 int authorlen = authorlen, onelinelen;
 216
 217                 /* get author and oneline */
 218                 for (buffer = commit->buffer; buffer && *buffer != '\0' &&
 219                                 *buffer != '\n'; ) {
 220                         char *eol = strchr(buffer, '\n');
 221
 222                         if (eol == NULL)
 223                                 eol = buffer + strlen(buffer);
 224                         else
 225                                 eol++;
 226
 227                         if (!strncmp(buffer, "author ", 7)) {
 228                                 char *bracket = strchr(buffer, '<');
 229
 230                                 if (bracket == NULL || bracket > eol)
 231                                         die("Invalid commit buffer: %s",
 232                                             sha1_to_hex(commit->object.sha1));
 233
 234                                 if (map_email(bracket + 1, scratch,
 235                                                         sizeof(scratch))) {
 236                                         author = scratch;
 237                                         authorlen = strlen(scratch);
 238                                 } else {
 239                                         while (bracket[-1] == ' ')
 240                                                 bracket--;
 241
 242                                         author = buffer + 7;
 243                                         authorlen = bracket - buffer - 7;
 244                                 }
 245                         }
 246                         buffer = eol;
 247                 }
 248
 249                 if (author == NULL)
 250                         die ("Missing author: %s",
 251                                         sha1_to_hex(commit->object.sha1));
 252
 253                 if (buffer == NULL || *buffer == '\0') {
 254                         oneline = "<none>";
 255                         onelinelen = sizeof(oneline) + 1;
 256                 } else {
 257                         char *eol;
 258
 259                         oneline = buffer + 1;
 260                         eol = strchr(oneline, '\n');
 261                         if (eol == NULL)
 262                                 onelinelen = strlen(oneline);
 263                         else
 264                                 onelinelen = eol - oneline;
 265                 }
 266
 267                 insert_author_oneline(list,
 268                                 author, authorlen, oneline, onelinelen);
 269         }
 270
 271 }
 272
 273 int cmd_shortlog(int argc, const char **argv, const char *prefix)
 274 {
 275         struct rev_info rev;
 276         struct path_list list = { NULL, 0, 0, 1 };
 277         int i, j, sort_by_number = 0, summary = 0;
 278
 279         /* since -n is a shadowed rev argument, parse our args first */
 280         while (argc > 1) {
 281                 if (!strcmp(argv[1], "-n") || !strcmp(argv[1], "--numbered"))
 282                         sort_by_number = 1;
 283                 else if (!strcmp(argv[1], "-s") ||
 284                                 !strcmp(argv[1], "--summary"))
 285                         summary = 1;
 286                 else if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
 287                         usage(shortlog_usage);
 288                 else
 289                         break;
 290                 argv++;
 291                 argc--;
 292         }
 293         init_revisions(&rev, prefix);
 294         argc = setup_revisions(argc, argv, &rev, NULL);
 295         if (argc > 1)
 296                 die ("unrecognized argument: %s", argv[1]);
 297
 298         if (!access(".mailmap", R_OK))
 299                 read_mailmap(".mailmap");
 300
 301         if (rev.pending.nr == 1)
 302                 die ("Need a range!");
 303         else if (rev.pending.nr == 0)
 304                 read_from_stdin(&list);
 305         else
 306                 get_from_rev(&rev, &list);
 307
 308         if (sort_by_number)
 309                 qsort(list.items, list.nr, sizeof(struct path_list_item),
 310                         compare_by_number);
 311
 312         for (i = 0; i < list.nr; i++) {
 313                 struct path_list *onelines = list.items[i].util;
 314
 315                 if (summary) {
 316                         printf("%s: %d\n", list.items[i].path, onelines->nr);
 317                 } else {
 318                         printf("%s (%d):\n", list.items[i].path, onelines->nr);
 319                         for (j = onelines->nr - 1; j >= 0; j--)
 320                                 printf("      %s\n", onelines->items[j].path);
 321                         printf("\n");
 322                 }
 323
 324                 onelines->strdup_paths = 1;
 325                 path_list_clear(onelines, 1);
 326                 free(onelines);
 327                 list.items[i].util = NULL;
 328         }
 329
 330         list.strdup_paths = 1;
 331         path_list_clear(&list, 1);
 332         mailmap.strdup_paths = 1;
 333         path_list_clear(&mailmap, 1);
 334
 335         return 0;
 336 }
 337