]> git.ipfire.org Git - thirdparty/git.git/blob - mailmap.c
Merge branch 'cc/write-promisor-file'
[thirdparty/git.git] / mailmap.c
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
11 static inline void debug_mm(const char *format, ...) {}
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
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
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 */
65 static int namemap_cmp(const char *a, const char *b)
66 {
67 return strcasecmp(a, b);
68 }
69
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
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
146 static void read_mailmap_line(struct string_list *map, char *buffer)
147 {
148 char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
149
150 if (buffer[0] == '#')
151 return;
152
153 if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
154 parse_name_and_email(name2, &name2, &email2, 1);
155
156 if (email1)
157 add_mapping(map, name1, email1, name2, email2);
158 }
159
160 static int read_mailmap_file(struct string_list *map, const char *filename)
161 {
162 char buffer[1024];
163 FILE *f;
164
165 if (!filename)
166 return 0;
167
168 f = fopen(filename, "r");
169 if (!f) {
170 if (errno == ENOENT)
171 return 0;
172 return error_errno("unable to open mailmap at %s", filename);
173 }
174
175 while (fgets(buffer, sizeof(buffer), f) != NULL)
176 read_mailmap_line(map, buffer);
177 fclose(f);
178 return 0;
179 }
180
181 static void read_mailmap_string(struct string_list *map, char *buf)
182 {
183 while (*buf) {
184 char *end = strchrnul(buf, '\n');
185
186 if (*end)
187 *end++ = '\0';
188
189 read_mailmap_line(map, buf);
190 buf = end;
191 }
192 }
193
194 static int read_mailmap_blob(struct string_list *map, const char *name)
195 {
196 struct object_id oid;
197 char *buf;
198 unsigned long size;
199 enum object_type type;
200
201 if (!name)
202 return 0;
203 if (get_oid(name, &oid) < 0)
204 return 0;
205
206 buf = read_object_file(&oid, &type, &size);
207 if (!buf)
208 return error("unable to read mailmap object at %s", name);
209 if (type != OBJ_BLOB)
210 return error("mailmap is not a blob: %s", name);
211
212 read_mailmap_string(map, buf);
213
214 free(buf);
215 return 0;
216 }
217
218 int read_mailmap(struct string_list *map)
219 {
220 int err = 0;
221
222 map->strdup_strings = 1;
223 map->cmp = namemap_cmp;
224
225 if (!git_mailmap_blob && is_bare_repository())
226 git_mailmap_blob = "HEAD:.mailmap";
227
228 err |= read_mailmap_file(map, ".mailmap");
229 if (startup_info->have_repository)
230 err |= read_mailmap_blob(map, git_mailmap_blob);
231 err |= read_mailmap_file(map, git_mailmap_file);
232 return err;
233 }
234
235 void clear_mailmap(struct string_list *map)
236 {
237 debug_mm("mailmap: clearing %d entries...\n", map->nr);
238 map->strdup_strings = 1;
239 string_list_clear_func(map, free_mailmap_entry);
240 debug_mm("mailmap: cleared\n");
241 }
242
243 /*
244 * Look for an entry in map that match string[0:len]; string[len]
245 * does not have to be NUL (but it could be).
246 */
247 static struct string_list_item *lookup_prefix(struct string_list *map,
248 const char *string, size_t len)
249 {
250 int i = string_list_find_insert_index(map, string, 1);
251 if (i < 0) {
252 /* exact match */
253 i = -1 - i;
254 if (!string[len])
255 return &map->items[i];
256 /*
257 * that map entry matches exactly to the string, including
258 * the cruft at the end beyond "len". That is not a match
259 * with string[0:len] that we are looking for.
260 */
261 } else if (!string[len]) {
262 /*
263 * asked with the whole string, and got nothing. No
264 * matching entry can exist in the map.
265 */
266 return NULL;
267 }
268
269 /*
270 * i is at the exact match to an overlong key, or location the
271 * overlong key would be inserted, which must come after the
272 * real location of the key if one exists.
273 */
274 while (0 <= --i && i < map->nr) {
275 int cmp = strncasecmp(map->items[i].string, string, len);
276 if (cmp < 0)
277 /*
278 * "i" points at a key definitely below the prefix;
279 * the map does not have string[0:len] in it.
280 */
281 break;
282 else if (!cmp && !map->items[i].string[len])
283 /* found it */
284 return &map->items[i];
285 /*
286 * otherwise, the string at "i" may be string[0:len]
287 * followed by a string that sorts later than string[len:];
288 * keep trying.
289 */
290 }
291 return NULL;
292 }
293
294 int map_user(struct string_list *map,
295 const char **email, size_t *emaillen,
296 const char **name, size_t *namelen)
297 {
298 struct string_list_item *item;
299 struct mailmap_entry *me;
300
301 debug_mm("map_user: map '%.*s' <%.*s>\n",
302 (int)*namelen, debug_str(*name),
303 (int)*emaillen, debug_str(*email));
304
305 item = lookup_prefix(map, *email, *emaillen);
306 if (item != NULL) {
307 me = (struct mailmap_entry *)item->util;
308 if (me->namemap.nr) {
309 /*
310 * The item has multiple items, so we'll look up on
311 * name too. If the name is not found, we choose the
312 * simple entry.
313 */
314 struct string_list_item *subitem;
315 subitem = lookup_prefix(&me->namemap, *name, *namelen);
316 if (subitem)
317 item = subitem;
318 }
319 }
320 if (item != NULL) {
321 struct mailmap_info *mi = (struct mailmap_info *)item->util;
322 if (mi->name == NULL && mi->email == NULL) {
323 debug_mm("map_user: -- (no simple mapping)\n");
324 return 0;
325 }
326 if (mi->email) {
327 *email = mi->email;
328 *emaillen = strlen(*email);
329 }
330 if (mi->name) {
331 *name = mi->name;
332 *namelen = strlen(*name);
333 }
334 debug_mm("map_user: to '%.*s' <%.*s>\n",
335 (int)*namelen, debug_str(*name),
336 (int)*emaillen, debug_str(*email));
337 return 1;
338 }
339 debug_mm("map_user: --\n");
340 return 0;
341 }