1 #include "cache.h"
2 #include "string-list.h"
3 #include "mailmap.h"
4 #include "object-store.h"
5
6 #define DEBUG_MAILMAP 0
7 #if DEBUG_MAILMAP
8 #define debug_mm(...) fprintf(stderr, __VA_ARGS__)
9 #define debug_str(X) ((X) ? (X) : "(none)")
10 #else
debug_mm(const char * format,...)11 static inline void debug_mm(const char *format, ...) {}
debug_str(const char * s)12 static inline const char *debug_str(const char *s) { return s; }
13 #endif
14
15 const char *git_mailmap_file;
16 const char *git_mailmap_blob;
17
18 struct mailmap_info {
19 char *name;
20 char *email;
21 };
22
23 struct mailmap_entry {
24 /* name and email for the simple mail-only case */
25 char *name;
26 char *email;
27
28 /* name and email for the complex mail and name matching case */
29 struct string_list namemap;
30 };
31
free_mailmap_info(void * p,const char * s)32 static void free_mailmap_info(void *p, const char *s)
33 {
34 struct mailmap_info *mi = (struct mailmap_info *)p;
35 debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n",
36 s, debug_str(mi->name), debug_str(mi->email));
37 free(mi->name);
38 free(mi->email);
39 }
40
free_mailmap_entry(void * p,const char * s)41 static void free_mailmap_entry(void *p, const char *s)
42 {
43 struct mailmap_entry *me = (struct mailmap_entry *)p;
44 debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n",
45 s, me->namemap.nr);
46 debug_mm("mailmap: - simple: '%s' <%s>\n",
47 debug_str(me->name), debug_str(me->email));
48
49 free(me->name);
50 free(me->email);
51
52 me->namemap.strdup_strings = 1;
53 string_list_clear_func(&me->namemap, free_mailmap_info);
54 }
55
56 /*
57 * On some systems (e.g. MinGW 4.0), string.h has _only_ inline
58 * definition of strcasecmp and no non-inline implementation is
59 * supplied anywhere, which is, eh, "unusual"; we cannot take an
60 * address of such a function to store it in namemap.cmp. This is
61 * here as a workaround---do not assign strcasecmp directly to
62 * namemap.cmp until we know no systems that matter have such an
63 * "unusual" string.h.
64 */
namemap_cmp(const char * a,const char * b)65 static int namemap_cmp(const char *a, const char *b)
66 {
67 return strcasecmp(a, b);
68 }
69
add_mapping(struct string_list * map,char * new_name,char * new_email,char * old_name,char * old_email)70 static void add_mapping(struct string_list *map,
71 char *new_name, char *new_email,
72 char *old_name, char *old_email)
73 {
74 struct mailmap_entry *me;
75 struct string_list_item *item;
76
77 if (old_email == NULL) {
78 old_email = new_email;
79 new_email = NULL;
80 }
81
82 item = string_list_insert(map, old_email);
83 if (item->util) {
84 me = (struct mailmap_entry *)item->util;
85 } else {
86 me = xcalloc(1, sizeof(struct mailmap_entry));
87 me->namemap.strdup_strings = 1;
88 me->namemap.cmp = namemap_cmp;
89 item->util = me;
90 }
91
92 if (old_name == NULL) {
93 debug_mm("mailmap: adding (simple) entry for '%s'\n", old_email);
94
95 /* Replace current name and new email for simple entry */
96 if (new_name) {
97 free(me->name);
98 me->name = xstrdup(new_name);
99 }
100 if (new_email) {
101 free(me->email);
102 me->email = xstrdup(new_email);
103 }
104 } else {
105 struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
106 debug_mm("mailmap: adding (complex) entry for '%s'\n", old_email);
107 mi->name = xstrdup_or_null(new_name);
108 mi->email = xstrdup_or_null(new_email);
109 string_list_insert(&me->namemap, old_name)->util = mi;
110 }
111
112 debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
113 debug_str(old_name), old_email,
114 debug_str(new_name), debug_str(new_email));
115 }
116
parse_name_and_email(char * buffer,char ** name,char ** email,int allow_empty_email)117 static char *parse_name_and_email(char *buffer, char **name,
118 char **email, int allow_empty_email)
119 {
120 char *left, *right, *nstart, *nend;
121 *name = *email = NULL;
122
123 if ((left = strchr(buffer, '<')) == NULL)
124 return NULL;
125 if ((right = strchr(left+1, '>')) == NULL)
126 return NULL;
127 if (!allow_empty_email && (left+1 == right))
128 return NULL;
129
130 /* remove whitespace from beginning and end of name */
131 nstart = buffer;
132 while (isspace(*nstart) && nstart < left)
133 ++nstart;
134 nend = left-1;
135 while (nend > nstart && isspace(*nend))
136 --nend;
137
138 *name = (nstart <= nend ? nstart : NULL);
139 *email = left+1;
140 *(nend+1) = '\0';
141 *right++ = '\0';
142
143 return (*right == '\0' ? NULL : right);
144 }
145
read_mailmap_line(struct string_list * map,char * buffer,char ** repo_abbrev)146 static void read_mailmap_line(struct string_list *map, char *buffer,
147 char **repo_abbrev)
148 {
149 char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
150 if (buffer[0] == '#') {
151 static const char abbrev[] = "# repo-abbrev:";
152 int abblen = sizeof(abbrev) - 1;
153 int len = strlen(buffer);
154
155 if (!repo_abbrev)
156 return;
157
158 if (len && buffer[len - 1] == '\n')
159 buffer[--len] = 0;
160 if (!strncmp(buffer, abbrev, abblen)) {
161 char *cp;
162
163 free(*repo_abbrev);
164
165 for (cp = buffer + abblen; isspace(*cp); cp++)
166 ; /* nothing */
167 *repo_abbrev = xstrdup(cp);
168 }
169 return;
170 }
171 if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
172 parse_name_and_email(name2, &name2, &email2, 1);
173
174 if (email1)
175 add_mapping(map, name1, email1, name2, email2);
176 }
177
read_mailmap_file(struct string_list * map,const char * filename,char ** repo_abbrev)178 static int read_mailmap_file(struct string_list *map, const char *filename,
179 char **repo_abbrev)
180 {
181 char buffer[1024];
182 FILE *f;
183
184 if (!filename)
185 return 0;
186
187 f = fopen(filename, "r");
188 if (!f) {
189 if (errno == ENOENT)
190 return 0;
191 return error_errno("unable to open mailmap at %s", filename);
192 }
193
194 while (fgets(buffer, sizeof(buffer), f) != NULL)
195 read_mailmap_line(map, buffer, repo_abbrev);
196 fclose(f);
197 return 0;
198 }
199
read_mailmap_string(struct string_list * map,char * buf,char ** repo_abbrev)200 static void read_mailmap_string(struct string_list *map, char *buf,
201 char **repo_abbrev)
202 {
203 while (*buf) {
204 char *end = strchrnul(buf, '\n');
205
206 if (*end)
207 *end++ = '\0';
208
209 read_mailmap_line(map, buf, repo_abbrev);
210 buf = end;
211 }
212 }
213
read_mailmap_blob(struct string_list * map,const char * name,char ** repo_abbrev)214 static int read_mailmap_blob(struct string_list *map,
215 const char *name,
216 char **repo_abbrev)
217 {
218 struct object_id oid;
219 char *buf;
220 unsigned long size;
221 enum object_type type;
222
223 if (!name)
224 return 0;
225 if (get_oid(name, &oid) < 0)
226 return 0;
227
228 buf = read_object_file(&oid, &type, &size);
229 if (!buf)
230 return error("unable to read mailmap object at %s", name);
231 if (type != OBJ_BLOB)
232 return error("mailmap is not a blob: %s", name);
233
234 read_mailmap_string(map, buf, repo_abbrev);
235
236 free(buf);
237 return 0;
238 }
239
read_mailmap(struct string_list * map,char ** repo_abbrev)240 int read_mailmap(struct string_list *map, char **repo_abbrev)
241 {
242 int err = 0;
243
244 map->strdup_strings = 1;
245 map->cmp = namemap_cmp;
246
247 if (!git_mailmap_blob && is_bare_repository())
248 git_mailmap_blob = "HEAD:.mailmap";
249
250 err |= read_mailmap_file(map, ".mailmap", repo_abbrev);
251 if (startup_info->have_repository)
252 err |= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
253 err |= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
254 return err;
255 }
256
clear_mailmap(struct string_list * map)257 void clear_mailmap(struct string_list *map)
258 {
259 debug_mm("mailmap: clearing %d entries...\n", map->nr);
260 map->strdup_strings = 1;
261 string_list_clear_func(map, free_mailmap_entry);
262 debug_mm("mailmap: cleared\n");
263 }
264
265 /*
266 * Look for an entry in map that match string[0:len]; string[len]
267 * does not have to be NUL (but it could be).
268 */
lookup_prefix(struct string_list * map,const char * string,size_t len)269 static struct string_list_item *lookup_prefix(struct string_list *map,
270 const char *string, size_t len)
271 {
272 int i = string_list_find_insert_index(map, string, 1);
273 if (i < 0) {
274 /* exact match */
275 i = -1 - i;
276 if (!string[len])
277 return &map->items[i];
278 /*
279 * that map entry matches exactly to the string, including
280 * the cruft at the end beyond "len". That is not a match
281 * with string[0:len] that we are looking for.
282 */
283 } else if (!string[len]) {
284 /*
285 * asked with the whole string, and got nothing. No
286 * matching entry can exist in the map.
287 */
288 return NULL;
289 }
290
291 /*
292 * i is at the exact match to an overlong key, or location the
293 * overlong key would be inserted, which must come after the
294 * real location of the key if one exists.
295 */
296 while (0 <= --i && i < map->nr) {
297 int cmp = strncasecmp(map->items[i].string, string, len);
298 if (cmp < 0)
299 /*
300 * "i" points at a key definitely below the prefix;
301 * the map does not have string[0:len] in it.
302 */
303 break;
304 else if (!cmp && !map->items[i].string[len])
305 /* found it */
306 return &map->items[i];
307 /*
308 * otherwise, the string at "i" may be string[0:len]
309 * followed by a string that sorts later than string[len:];
310 * keep trying.
311 */
312 }
313 return NULL;
314 }
315
map_user(struct string_list * map,const char ** email,size_t * emaillen,const char ** name,size_t * namelen)316 int map_user(struct string_list *map,
317 const char **email, size_t *emaillen,
318 const char **name, size_t *namelen)
319 {
320 struct string_list_item *item;
321 struct mailmap_entry *me;
322
323 debug_mm("map_user: map '%.*s' <%.*s>\n",
324 (int)*namelen, debug_str(*name),
325 (int)*emaillen, debug_str(*email));
326
327 item = lookup_prefix(map, *email, *emaillen);
328 if (item != NULL) {
329 me = (struct mailmap_entry *)item->util;
330 if (me->namemap.nr) {
331 /*
332 * The item has multiple items, so we'll look up on
333 * name too. If the name is not found, we choose the
334 * simple entry.
335 */
336 struct string_list_item *subitem;
337 subitem = lookup_prefix(&me->namemap, *name, *namelen);
338 if (subitem)
339 item = subitem;
340 }
341 }
342 if (item != NULL) {
343 struct mailmap_info *mi = (struct mailmap_info *)item->util;
344 if (mi->name == NULL && mi->email == NULL) {
345 debug_mm("map_user: -- (no simple mapping)\n");
346 return 0;
347 }
348 if (mi->email) {
349 *email = mi->email;
350 *emaillen = strlen(*email);
351 }
352 if (mi->name) {
353 *name = mi->name;
354 *namelen = strlen(*name);
355 }
356 debug_mm("map_user: to '%.*s' <%.*s>\n",
357 (int)*namelen, debug_str(*name),
358 (int)*emaillen, debug_str(*email));
359 return 1;
360 }
361 debug_mm("map_user: --\n");
362 return 0;
363 }
364