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 = xcalloc(1, sizeof(struct mailmap_entry));
  74                 ((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
  75         }
  76         me = (struct mailmap_entry *)map->items[index].util;
  77
  78         if (old_name == NULL) {
  79                 debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
  80                 /* Replace current name and new email for simple entry */
  81                 if (new_name) {
  82                         free(me->name);
  83                         me->name = xstrdup(new_name);
  84                 }
  85                 if (new_email) {
  86                         free(me->email);
  87                         me->email = xstrdup(new_email);
  88                 }
  89         } else {
  90                 struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
  91                 debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
  92                 if (new_name)
  93                         mi->name = xstrdup(new_name);
  94                 if (new_email)
  95                         mi->email = xstrdup(new_email);
  96                 string_list_insert(&me->namemap, old_name)->util = mi;
  97         }
  98
  99         debug_mm("mailmap:  '%s' <%s> -> '%s' <%s>\n",
 100                  old_name, old_email, new_name, new_email);
 101 }
 102
 103 static char *parse_name_and_email(char *buffer, char **name,
 104                 char **email, int allow_empty_email)
 105 {
 106         char *left, *right, *nstart, *nend;
 107         *name = *email = NULL;
 108
 109         if ((left = strchr(buffer, '<')) == NULL)
 110                 return NULL;
 111         if ((right = strchr(left+1, '>')) == NULL)
 112                 return NULL;
 113         if (!allow_empty_email && (left+1 == right))
 114                 return NULL;
 115
 116         /* remove whitespace from beginning and end of name */
 117         nstart = buffer;
 118         while (isspace(*nstart) && nstart < left)
 119                 ++nstart;
 120         nend = left-1;
 121         while (nend > nstart && isspace(*nend))
 122                 --nend;
 123
 124         *name = (nstart < nend ? nstart : NULL);
 125         *email = left+1;
 126         *(nend+1) = '\0';
 127         *right++ = '\0';
 128
 129         return (*right == '\0' ? NULL : right);
 130 }
 131
 132 static void read_mailmap_line(struct string_list *map, char *buffer,
 133                               char **repo_abbrev)
 134 {
 135         char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
 136         if (buffer[0] == '#') {
 137                 static const char abbrev[] = "# repo-abbrev:";
 138                 int abblen = sizeof(abbrev) - 1;
 139                 int len = strlen(buffer);
 140
 141                 if (!repo_abbrev)
 142                         return;
 143
 144                 if (len && buffer[len - 1] == '\n')
 145                         buffer[--len] = 0;
 146                 if (!strncmp(buffer, abbrev, abblen)) {
 147                         char *cp;
 148
 149                         if (repo_abbrev)
 150                                 free(*repo_abbrev);
 151                         *repo_abbrev = xmalloc(len);
 152
 153                         for (cp = buffer + abblen; isspace(*cp); cp++)
 154                                 ; /* nothing */
 155                         strcpy(*repo_abbrev, cp);
 156                 }
 157                 return;
 158         }
 159         if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
 160                 parse_name_and_email(name2, &name2, &email2, 1);
 161
 162         if (email1)
 163                 add_mapping(map, name1, email1, name2, email2);
 164 }
 165
 166 static int read_mailmap_file(struct string_list *map, const char *filename,
 167                              char **repo_abbrev)
 168 {
 169         char buffer[1024];
 170         FILE *f = (filename == NULL ? NULL : fopen(filename, "r"));
 171
 172         if (f == NULL)
 173                 return 1;
 174         while (fgets(buffer, sizeof(buffer), f) != NULL)
 175                 read_mailmap_line(map, buffer, repo_abbrev);
 176         fclose(f);
 177         return 0;
 178 }
 179
 180 int read_mailmap(struct string_list *map, char **repo_abbrev)
 181 {
 182         map->strdup_strings = 1;
 183         /* each failure returns 1, so >1 means both calls failed */
 184         return read_mailmap_file(map, ".mailmap", repo_abbrev) +
 185                read_mailmap_file(map, git_mailmap_file, repo_abbrev) > 1;
 186 }
 187
 188 void clear_mailmap(struct string_list *map)
 189 {
 190         debug_mm("mailmap: clearing %d entries...\n", map->nr);
 191         map->strdup_strings = 1;
 192         string_list_clear_func(map, free_mailmap_entry);
 193         debug_mm("mailmap: cleared\n");
 194 }
 195
 196 int map_user(struct string_list *map,
 197              char *email, int maxlen_email, char *name, int maxlen_name)
 198 {
 199         char *end_of_email;
 200         struct string_list_item *item;
 201         struct mailmap_entry *me;
 202         char buf[1024], *mailbuf;
 203         int i;
 204
 205         /* figure out space requirement for email */
 206         end_of_email = strchr(email, '>');
 207         if (!end_of_email) {
 208                 /* email passed in might not be wrapped in <>, but end with a \0 */
 209                 end_of_email = memchr(email, '\0', maxlen_email);
 210                 if (!end_of_email)
 211                         return 0;
 212         }
 213         if (end_of_email - email + 1 < sizeof(buf))
 214                 mailbuf = buf;
 215         else
 216                 mailbuf = xmalloc(end_of_email - email + 1);
 217
 218         /* downcase the email address */
 219         for (i = 0; i < end_of_email - email; i++)
 220                 mailbuf[i] = tolower(email[i]);
 221         mailbuf[i] = 0;
 222
 223         debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
 224         item = string_list_lookup(map, mailbuf);
 225         if (item != NULL) {
 226                 me = (struct mailmap_entry *)item->util;
 227                 if (me->namemap.nr) {
 228                         /* The item has multiple items, so we'll look up on name too */
 229                         /* If the name is not found, we choose the simple entry      */
 230                         struct string_list_item *subitem = string_list_lookup(&me->namemap, name);
 231                         if (subitem)
 232                                 item = subitem;
 233                 }
 234         }
 235         if (mailbuf != buf)
 236                 free(mailbuf);
 237         if (item != NULL) {
 238                 struct mailmap_info *mi = (struct mailmap_info *)item->util;
 239                 if (mi->name == NULL && (mi->email == NULL || maxlen_email == 0)) {
 240                         debug_mm("map_user:  -- (no simple mapping)\n");
 241                         return 0;
 242                 }
 243                 if (maxlen_email && mi->email)
 244                         strlcpy(email, mi->email, maxlen_email);
 245                 else
 246                         *end_of_email = '\0';
 247                 if (maxlen_name && mi->name)
 248                         strlcpy(name, mi->name, maxlen_name);
 249                 debug_mm("map_user:  to '%s' <%s>\n", name, mi->email ? mi->email : "");
 250                 return 1;
 251         }
 252         debug_mm("map_user:  --\n");
 253         return 0;
 254 }