89bc318de4a537e228f3e00a173b46b16b7c4f73
   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
   9static inline void debug_mm(const char *format, ...) {}
  10#endif
  11
  12const char *git_mailmap_file;
  13
  14struct mailmap_info {
  15        char *name;
  16        char *email;
  17};
  18
  19struct 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
  28static 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
  36static 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
  48static 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
 103static 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
 132static 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
 166static 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
 180int 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
 188void 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
 196int 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}