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         char *p;
  54
  55         if (old_email)
  56                 for (p = old_email; *p; p++)
  57                         *p = tolower(*p);
  58         if (new_email)
  59                 for (p = new_email; *p; p++)
  60                         *p = tolower(*p);
  61
  62         if (old_email == NULL) {
  63                 old_email = new_email;
  64                 new_email = NULL;
  65         }
  66
  67         if ((index = string_list_find_insert_index(map, old_email, 1)) < 0) {
  68                 /* mailmap entry exists, invert index value */
  69                 index = -1 - index;
  70         } else {
  71                 /* create mailmap entry */
  72                 struct string_list_item *item = string_list_insert_at_index(map, index, old_email);
  73                 item->util = xmalloc(sizeof(struct mailmap_entry));
  74                 memset(item->util, 0, sizeof(struct mailmap_entry));
  75                 ((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
  76         }
  77         me = (struct mailmap_entry *)map->items[index].util;
  78
  79         if (old_name == NULL) {
  80                 debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
  81                 /* Replace current name and new email for simple entry */
  82                 free(me->name);
  83                 free(me->email);
  84                 if (new_name)
  85                         me->name = xstrdup(new_name);
  86                 if (new_email)
  87                         me->email = xstrdup(new_email);
  88         } else {
  89                 struct mailmap_info *mi = xmalloc(sizeof(struct mailmap_info));
  90                 debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
  91                 if (new_name)
  92                         mi->name = xstrdup(new_name);
  93                 if (new_email)
  94                         mi->email = xstrdup(new_email);
  95                 string_list_insert(&me->namemap, old_name)->util = mi;
  96         }
  97
  98         debug_mm("mailmap:  '%s' <%s> -> '%s' <%s>\n",
  99                  old_name, old_email, new_name, new_email);
 100 }
 101
 102 static char *parse_name_and_email(char *buffer, char **name,
 103                 char **email, int allow_empty_email)
 104 {
 105         char *left, *right, *nstart, *nend;
 106         *name = *email = NULL;
 107
 108         if ((left = strchr(buffer, '<')) == NULL)
 109                 return NULL;
 110         if ((right = strchr(left+1, '>')) == NULL)
 111                 return NULL;
 112         if (!allow_empty_email && (left+1 == right))
 113                 return NULL;
 114
 115         /* remove whitespace from beginning and end of name */
 116         nstart = buffer;
 117         while (isspace(*nstart) && nstart < left)
 118                 ++nstart;
 119         nend = left-1;
 120         while (isspace(*nend) && nend > nstart)
 121                 --nend;
 122
 123         *name = (nstart < nend ? nstart : NULL);
 124         *email = left+1;
 125         *(nend+1) = '\0';
 126         *right++ = '\0';
 127
 128         return (*right == '\0' ? NULL : right);
 129 }
 130
 131 static int read_single_mailmap(struct string_list *map, const char *filename, char **repo_abbrev)
 132 {
 133         char buffer[1024];
 134         FILE *f = (filename == NULL ? NULL : fopen(filename, "r"));
 135
 136         if (f == NULL)
 137                 return 1;
 138         while (fgets(buffer, sizeof(buffer), f) != NULL) {
 139                 char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
 140                 if (buffer[0] == '#') {
 141                         static const char abbrev[] = "# repo-abbrev:";
 142                         int abblen = sizeof(abbrev) - 1;
 143                         int len = strlen(buffer);
 144
 145                         if (!repo_abbrev)
 146                                 continue;
 147
 148                         if (len && buffer[len - 1] == '\n')
 149                                 buffer[--len] = 0;
 150                         if (!strncmp(buffer, abbrev, abblen)) {
 151                                 char *cp;
 152
 153                                 if (repo_abbrev)
 154                                         free(*repo_abbrev);
 155                                 *repo_abbrev = xmalloc(len);
 156
 157                                 for (cp = buffer + abblen; isspace(*cp); cp++)
 158                                         ; /* nothing */
 159                                 strcpy(*repo_abbrev, cp);
 160                         }
 161                         continue;
 162                 }
 163                 if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
 164                         parse_name_and_email(name2, &name2, &email2, 1);
 165
 166                 if (email1)
 167                         add_mapping(map, name1, email1, name2, email2);
 168         }
 169         fclose(f);
 170         return 0;
 171 }
 172
 173 int read_mailmap(struct string_list *map, char **repo_abbrev)
 174 {
 175         map->strdup_strings = 1;
 176         /* each failure returns 1, so >1 means both calls failed */
 177         return read_single_mailmap(map, ".mailmap", repo_abbrev) +
 178                read_single_mailmap(map, git_mailmap_file, repo_abbrev) > 1;
 179 }
 180
 181 void clear_mailmap(struct string_list *map)
 182 {
 183         debug_mm("mailmap: clearing %d entries...\n", map->nr);
 184         map->strdup_strings = 1;
 185         string_list_clear_func(map, free_mailmap_entry);
 186         debug_mm("mailmap: cleared\n");
 187 }
 188
 189 int map_user(struct string_list *map,
 190              char *email, int maxlen_email, char *name, int maxlen_name)
 191 {
 192         char *p;
 193         struct string_list_item *item;
 194         struct mailmap_entry *me;
 195         char buf[1024], *mailbuf;
 196         int i;
 197
 198         /* figure out space requirement for email */
 199         p = strchr(email, '>');
 200         if (!p) {
 201                 /* email passed in might not be wrapped in <>, but end with a \0 */
 202                 p = memchr(email, '\0', maxlen_email);
 203                 if (!p)
 204                         return 0;
 205         }
 206         if (p - email + 1 < sizeof(buf))
 207                 mailbuf = buf;
 208         else
 209                 mailbuf = xmalloc(p - email + 1);
 210
 211         /* downcase the email address */
 212         for (i = 0; i < p - email; i++)
 213                 mailbuf[i] = tolower(email[i]);
 214         mailbuf[i] = 0;
 215
 216         debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
 217         item = string_list_lookup(map, mailbuf);
 218         if (item != NULL) {
 219                 me = (struct mailmap_entry *)item->util;
 220                 if (me->namemap.nr) {
 221                         /* The item has multiple items, so we'll look up on name too */
 222                         /* If the name is not found, we choose the simple entry      */
 223                         struct string_list_item *subitem = string_list_lookup(&me->namemap, name);
 224                         if (subitem)
 225                                 item = subitem;
 226                 }
 227         }
 228         if (mailbuf != buf)
 229                 free(mailbuf);
 230         if (item != NULL) {
 231                 struct mailmap_info *mi = (struct mailmap_info *)item->util;
 232                 if (mi->name == NULL && (mi->email == NULL || maxlen_email == 0)) {
 233                         debug_mm("map_user:  -- (no simple mapping)\n");
 234                         return 0;
 235                 }
 236                 if (maxlen_email && mi->email)
 237                         strlcpy(email, mi->email, maxlen_email);
 238                 if (maxlen_name && mi->name)
 239                         strlcpy(name, mi->name, maxlen_name);
 240                 debug_mm("map_user:  to '%s' <%s>\n", name, mi->email ? mi->email : "");
 241                 return 1;
 242         }
 243         debug_mm("map_user:  --\n");
 244         return 0;
 245 }