config parsing options: allow one flag multiple times
[alt-git.git] / mailmap.c
blob44614fc411fa7948d710c07a0262454aa0e76d0b
1 #include "cache.h"
2 #include "string-list.h"
3 #include "mailmap.h"
5 #define DEBUG_MAILMAP 0
6 #if DEBUG_MAILMAP
7 #define debug_mm(...) fprintf(stderr, __VA_ARGS__)
8 #define debug_str(X) ((X) ? (X) : "(none)")
9 #else
10 static inline void debug_mm(const char *format, ...) {}
11 static inline const char *debug_str(const char *s) { return s; }
12 #endif
14 const char *git_mailmap_file;
15 const char *git_mailmap_blob;
17 struct mailmap_info {
18 char *name;
19 char *email;
22 struct mailmap_entry {
23 /* name and email for the simple mail-only case */
24 char *name;
25 char *email;
27 /* name and email for the complex mail and name matching case */
28 struct string_list namemap;
31 static void free_mailmap_info(void *p, const char *s)
33 struct mailmap_info *mi = (struct mailmap_info *)p;
34 debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n",
35 s, debug_str(mi->name), debug_str(mi->email));
36 free(mi->name);
37 free(mi->email);
40 static void free_mailmap_entry(void *p, const char *s)
42 struct mailmap_entry *me = (struct mailmap_entry *)p;
43 debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n",
44 s, me->namemap.nr);
45 debug_mm("mailmap: - simple: '%s' <%s>\n",
46 debug_str(me->name), debug_str(me->email));
48 free(me->name);
49 free(me->email);
51 me->namemap.strdup_strings = 1;
52 string_list_clear_func(&me->namemap, free_mailmap_info);
55 static void add_mapping(struct string_list *map,
56 char *new_name, char *new_email,
57 char *old_name, char *old_email)
59 struct mailmap_entry *me;
60 int index;
62 if (old_email == NULL) {
63 old_email = new_email;
64 new_email = NULL;
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 me = (struct mailmap_entry *)map->items[index].util;
71 } else {
72 /* create mailmap entry */
73 struct string_list_item *item;
75 item = string_list_insert_at_index(map, index, old_email);
76 me = xcalloc(1, sizeof(struct mailmap_entry));
77 me->namemap.strdup_strings = 1;
78 me->namemap.cmp = strcasecmp;
79 item->util = me;
82 if (old_name == NULL) {
83 debug_mm("mailmap: adding (simple) entry for %s at index %d\n",
84 old_email, index);
85 /* Replace current name and new email for simple entry */
86 if (new_name) {
87 free(me->name);
88 me->name = xstrdup(new_name);
90 if (new_email) {
91 free(me->email);
92 me->email = xstrdup(new_email);
94 } else {
95 struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
96 debug_mm("mailmap: adding (complex) entry for %s at index %d\n",
97 old_email, index);
98 if (new_name)
99 mi->name = xstrdup(new_name);
100 if (new_email)
101 mi->email = xstrdup(new_email);
102 string_list_insert(&me->namemap, old_name)->util = mi;
105 debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
106 debug_str(old_name), old_email,
107 debug_str(new_name), debug_str(new_email));
110 static char *parse_name_and_email(char *buffer, char **name,
111 char **email, int allow_empty_email)
113 char *left, *right, *nstart, *nend;
114 *name = *email = NULL;
116 if ((left = strchr(buffer, '<')) == NULL)
117 return NULL;
118 if ((right = strchr(left+1, '>')) == NULL)
119 return NULL;
120 if (!allow_empty_email && (left+1 == right))
121 return NULL;
123 /* remove whitespace from beginning and end of name */
124 nstart = buffer;
125 while (isspace(*nstart) && nstart < left)
126 ++nstart;
127 nend = left-1;
128 while (nend > nstart && isspace(*nend))
129 --nend;
131 *name = (nstart <= nend ? nstart : NULL);
132 *email = left+1;
133 *(nend+1) = '\0';
134 *right++ = '\0';
136 return (*right == '\0' ? NULL : right);
139 static void read_mailmap_line(struct string_list *map, char *buffer,
140 char **repo_abbrev)
142 char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
143 if (buffer[0] == '#') {
144 static const char abbrev[] = "# repo-abbrev:";
145 int abblen = sizeof(abbrev) - 1;
146 int len = strlen(buffer);
148 if (!repo_abbrev)
149 return;
151 if (len && buffer[len - 1] == '\n')
152 buffer[--len] = 0;
153 if (!strncmp(buffer, abbrev, abblen)) {
154 char *cp;
156 if (repo_abbrev)
157 free(*repo_abbrev);
158 *repo_abbrev = xmalloc(len);
160 for (cp = buffer + abblen; isspace(*cp); cp++)
161 ; /* nothing */
162 strcpy(*repo_abbrev, cp);
164 return;
166 if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
167 parse_name_and_email(name2, &name2, &email2, 1);
169 if (email1)
170 add_mapping(map, name1, email1, name2, email2);
173 static int read_mailmap_file(struct string_list *map, const char *filename,
174 char **repo_abbrev)
176 char buffer[1024];
177 FILE *f;
179 if (!filename)
180 return 0;
182 f = fopen(filename, "r");
183 if (!f) {
184 if (errno == ENOENT)
185 return 0;
186 return error("unable to open mailmap at %s: %s",
187 filename, strerror(errno));
190 while (fgets(buffer, sizeof(buffer), f) != NULL)
191 read_mailmap_line(map, buffer, repo_abbrev);
192 fclose(f);
193 return 0;
196 static void read_mailmap_buf(struct string_list *map,
197 const char *buf, unsigned long len,
198 char **repo_abbrev)
200 while (len) {
201 const char *end = strchrnul(buf, '\n');
202 unsigned long linelen = end - buf + 1;
203 char *line = xmemdupz(buf, linelen);
205 read_mailmap_line(map, line, repo_abbrev);
207 free(line);
208 buf += linelen;
209 len -= linelen;
213 static int read_mailmap_blob(struct string_list *map,
214 const char *name,
215 char **repo_abbrev)
217 unsigned char sha1[20];
218 char *buf;
219 unsigned long size;
220 enum object_type type;
222 if (!name)
223 return 0;
224 if (get_sha1(name, sha1) < 0)
225 return 0;
227 buf = read_sha1_file(sha1, &type, &size);
228 if (!buf)
229 return error("unable to read mailmap object at %s", name);
230 if (type != OBJ_BLOB)
231 return error("mailmap is not a blob: %s", name);
233 read_mailmap_buf(map, buf, size, repo_abbrev);
235 free(buf);
236 return 0;
239 int read_mailmap(struct string_list *map, char **repo_abbrev)
241 int err = 0;
243 map->strdup_strings = 1;
244 map->cmp = strcasecmp;
246 if (!git_mailmap_blob && is_bare_repository())
247 git_mailmap_blob = "HEAD:.mailmap";
249 err |= read_mailmap_file(map, ".mailmap", repo_abbrev);
250 err |= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
251 err |= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
252 return err;
255 void clear_mailmap(struct string_list *map)
257 debug_mm("mailmap: clearing %d entries...\n", map->nr);
258 map->strdup_strings = 1;
259 string_list_clear_func(map, free_mailmap_entry);
260 debug_mm("mailmap: cleared\n");
264 * Look for an entry in map that match string[0:len]; string[len]
265 * does not have to be NUL (but it could be).
267 static struct string_list_item *lookup_prefix(struct string_list *map,
268 const char *string, size_t len)
270 int i = string_list_find_insert_index(map, string, 1);
271 if (i < 0) {
272 /* exact match */
273 i = -1 - i;
274 if (!string[len])
275 return &map->items[i];
277 * that map entry matches exactly to the string, including
278 * the cruft at the end beyond "len". That is not a match
279 * with string[0:len] that we are looking for.
281 } else if (!string[len]) {
283 * asked with the whole string, and got nothing. No
284 * matching entry can exist in the map.
286 return NULL;
290 * i is at the exact match to an overlong key, or location the
291 * overlong key would be inserted, which must come after the
292 * real location of the key if one exists.
294 while (0 <= --i && i < map->nr) {
295 int cmp = strncasecmp(map->items[i].string, string, len);
296 if (cmp < 0)
298 * "i" points at a key definitely below the prefix;
299 * the map does not have string[0:len] in it.
301 break;
302 else if (!cmp && !map->items[i].string[len])
303 /* found it */
304 return &map->items[i];
306 * otherwise, the string at "i" may be string[0:len]
307 * followed by a string that sorts later than string[len:];
308 * keep trying.
311 return NULL;
314 int map_user(struct string_list *map,
315 const char **email, size_t *emaillen,
316 const char **name, size_t *namelen)
318 struct string_list_item *item;
319 struct mailmap_entry *me;
321 debug_mm("map_user: map '%.*s' <%.*s>\n",
322 (int)*namelen, debug_str(*name),
323 (int)*emaillen, debug_str(*email));
325 item = lookup_prefix(map, *email, *emaillen);
326 if (item != NULL) {
327 me = (struct mailmap_entry *)item->util;
328 if (me->namemap.nr) {
330 * The item has multiple items, so we'll look up on
331 * name too. If the name is not found, we choose the
332 * simple entry.
334 struct string_list_item *subitem;
335 subitem = lookup_prefix(&me->namemap, *name, *namelen);
336 if (subitem)
337 item = subitem;
340 if (item != NULL) {
341 struct mailmap_info *mi = (struct mailmap_info *)item->util;
342 if (mi->name == NULL && mi->email == NULL) {
343 debug_mm("map_user: -- (no simple mapping)\n");
344 return 0;
346 if (mi->email) {
347 *email = mi->email;
348 *emaillen = strlen(*email);
350 if (mi->name) {
351 *name = mi->name;
352 *namelen = strlen(*name);
354 debug_mm("map_user: to '%.*s' <%.*s>\n",
355 (int)*namelen, debug_str(*name),
356 (int)*emaillen, debug_str(*email));
357 return 1;
359 debug_mm("map_user: --\n");
360 return 0;