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