mailmap.c

   1 #include "cache.h"
   2 #include "string-list.h"
   3 #include "mailmap.h"
   4
   5 #define DEBUG_MAILMAP 0
   6 #if DEBUG_MAILMAP
   7 #define debug_mm(...) fprintf(stderr, __VA_ARGS__)
   8 #else
   9 static inline void debug_mm(const char *format, ...) {}
  10 #endif
  11
  12 const char *git_mailmap_file;
  13
  14 struct mailmap_info {
  15         char *name;
  16         char *email;
  17 };
  18
  19 struct mailmap_entry {
  20         /* name and email for the simple mail-only case */
  21         char *name;
  22         char *email;
  23
  24         /* name and email for the complex mail and name matching case */
  25         struct string_list namemap;
  26 };
  27
  28 static void free_mailmap_info(void *p, const char *s)
  29 {
  30         struct mailmap_info *mi = (struct mailmap_info *)p;
  31         debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n", s, mi->name, mi->email);
  32         free(mi->name);
  33         free(mi->email);
  34 }
  35
  36 static void free_mailmap_entry(void *p, const char *s)
  37 {
  38         struct mailmap_entry *me = (struct mailmap_entry *)p;
  39         debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n", s, me->namemap.nr);
  40         debug_mm("mailmap: - simple: '%s' <%s>\n", me->name, me->email);
  41         free(me->name);
  42         free(me->email);
  43
  44         me->namemap.strdup_strings = 1;
  45         string_list_clear_func(&me->namemap, free_mailmap_info);
  46 }
  47
  48 static void add_mapping(struct string_list *map,
  49                         char *new_name, char *new_email, char *old_name, char *old_email)
  50 {
  51         struct mailmap_entry *me;
  52         int index;
  53         if (old_email == NULL) {
  54                 old_email = new_email;
  55                 new_email = NULL;
  56         }
  57
  58         if ((index = string_list_find_insert_index(map, old_email, 1)) < 0) {
  59                 /* mailmap entry exists, invert index value */
  60                 index = -1 - index;
  61         } else {
  62                 /* create mailmap entry */
  63                 struct string_list_item *item = string_list_insert_at_index(index, old_email, map);
  64                 item->util = xmalloc(sizeof(struct mailmap_entry));
  65                 memset(item->util, 0, sizeof(struct mailmap_entry));
  66                 ((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
  67         }
  68         me = (struct mailmap_entry *)map->items[index].util;
  69
  70         if (old_name == NULL) {
  71                 debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
  72                 /* Replace current name and new email for simple entry */
  73                 free(me->name);
  74                 free(me->email);
  75                 if (new_name)
  76                         me->name = xstrdup(new_name);
  77                 if (new_email)
  78                         me->email = xstrdup(new_email);
  79         } else {
  80                 struct mailmap_info *mi = xmalloc(sizeof(struct mailmap_info));
  81                 debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
  82                 if (new_name)
  83                         mi->name = xstrdup(new_name);
  84                 if (new_email)
  85                         mi->email = xstrdup(new_email);
  86                 string_list_insert(old_name, &me->namemap)->util = mi;
  87         }
  88
  89         debug_mm("mailmap:  '%s' <%s> -> '%s' <%s>\n",
  90                  old_name, old_email, new_name, new_email);
  91 }
  92
  93 static char *parse_name_and_email(char *buffer, char **name,
  94                 char **email, int allow_empty_email)
  95 {
  96         char *left, *right, *nstart, *nend;
  97         *name = *email = 0;
  98
  99         if ((left = strchr(buffer, '<')) == NULL)
 100                 return NULL;
 101         if ((right = strchr(left+1, '>')) == NULL)
 102                 return NULL;
 103         if (!allow_empty_email && (left+1 == right))
 104                 return NULL;
 105
 106         /* remove whitespace from beginning and end of name */
 107         nstart = buffer;
 108         while (isspace(*nstart) && nstart < left)
 109                 ++nstart;
 110         nend = left-1;
 111         while (isspace(*nend) && nend > nstart)
 112                 --nend;
 113
 114         *name = (nstart < nend ? nstart : NULL);
 115         *email = left+1;
 116         *(nend+1) = '\0';
 117         *right++ = '\0';
 118
 119         return (*right == '\0' ? NULL : right);
 120 }
 121
 122 static int read_single_mailmap(struct string_list *map, const char *filename, char **repo_abbrev)
 123 {
 124         char buffer[1024];
 125         FILE *f = (filename == NULL ? NULL : fopen(filename, "r"));
 126
 127         if (f == NULL)
 128                 return 1;
 129         while (fgets(buffer, sizeof(buffer), f) != NULL) {
 130                 char *name1 = 0, *email1 = 0, *name2 = 0, *email2 = 0;
 131                 if (buffer[0] == '#') {
 132                         static const char abbrev[] = "# repo-abbrev:";
 133                         int abblen = sizeof(abbrev) - 1;
 134                         int len = strlen(buffer);
 135
 136                         if (!repo_abbrev)
 137                                 continue;
 138
 139                         if (len && buffer[len - 1] == '\n')
 140                                 buffer[--len] = 0;
 141                         if (!strncmp(buffer, abbrev, abblen)) {
 142                                 char *cp;
 143
 144                                 if (repo_abbrev)
 145                                         free(*repo_abbrev);
 146                                 *repo_abbrev = xmalloc(len);
 147
 148                                 for (cp = buffer + abblen; isspace(*cp); cp++)
 149                                         ; /* nothing */
 150                                 strcpy(*repo_abbrev, cp);
 151                         }
 152                         continue;
 153                 }
 154                 if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
 155                         parse_name_and_email(name2, &name2, &email2, 1);
 156
 157                 if (email1)
 158                         add_mapping(map, name1, email1, name2, email2);
 159         }
 160         fclose(f);
 161         return 0;
 162 }
 163
 164 int read_mailmap(struct string_list *map, char **repo_abbrev)
 165 {
 166         map->strdup_strings = 1;
 167         /* each failure returns 1, so >1 means both calls failed */
 168         return read_single_mailmap(map, ".mailmap", repo_abbrev) +
 169                read_single_mailmap(map, git_mailmap_file, repo_abbrev) > 1;
 170 }
 171
 172 void clear_mailmap(struct string_list *map)
 173 {
 174         debug_mm("mailmap: clearing %d entries...\n", map->nr);
 175         map->strdup_strings = 1;
 176         string_list_clear_func(map, free_mailmap_entry);
 177         debug_mm("mailmap: cleared\n");
 178 }
 179
 180 int map_user(struct string_list *map,
 181              char *email, int maxlen_email, char *name, int maxlen_name)
 182 {
 183         char *p;
 184         struct string_list_item *item;
 185         struct mailmap_entry *me;
 186         char buf[1024], *mailbuf;
 187         int i;
 188
 189         /* figure out space requirement for email */
 190         p = strchr(email, '>');
 191         if (!p) {
 192                 /* email passed in might not be wrapped in <>, but end with a \0 */
 193                 p = memchr(email, '\0', maxlen_email);
 194                 if (p == 0)
 195                         return 0;
 196         }
 197         if (p - email + 1 < sizeof(buf))
 198                 mailbuf = buf;
 199         else
 200                 mailbuf = xmalloc(p - email + 1);
 201
 202         /* downcase the email address */
 203         for (i = 0; i < p - email; i++)
 204                 mailbuf[i] = tolower(email[i]);
 205         mailbuf[i] = 0;
 206
 207         debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
 208         item = string_list_lookup(mailbuf, map);
 209         if (item != NULL) {
 210                 me = (struct mailmap_entry *)item->util;
 211                 if (me->namemap.nr) {
 212                         /* The item has multiple items, so we'll look up on name too */
 213                         /* If the name is not found, we choose the simple entry      */
 214                         struct string_list_item *subitem = string_list_lookup(name, &me->namemap);
 215                         if (subitem)
 216                                 item = subitem;
 217                 }
 218         }
 219         if (mailbuf != buf)
 220                 free(mailbuf);
 221         if (item != NULL) {
 222                 struct mailmap_info *mi = (struct mailmap_info *)item->util;
 223                 if (mi->name == NULL && (mi->email == NULL || maxlen_email == 0)) {
 224                         debug_mm("map_user:  -- (no simple mapping)\n");
 225                         return 0;
 226                 }
 227                 if (maxlen_email && mi->email)
 228                         strlcpy(email, mi->email, maxlen_email);
 229                 if (maxlen_name && mi->name)
 230                         strlcpy(name, mi->name, maxlen_name);
 231                 debug_mm("map_user:  to '%s' <%s>\n", name, mi->email ? mi->email : "");
 232                 return 1;
 233         }
 234         debug_mm("map_user:  --\n");
 235         return 0;
 236 }
 237
 238 int map_email(struct string_list *map, const char *email, char *name, int maxlen)
 239 {
 240         return map_user(map, (char *)email, 0, name, maxlen);
 241 }