Merge branch 'rs/alias-use-copy-array'
[git/git.git] / mailmap.c
CommitLineData
7c1c6782 1#include "cache.h"
c455c87c 2#include "string-list.h"
fe5d30b6 3#include "mailmap.h"
cbd53a21 4#include "object-store.h"
7c1c6782 5
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6#define DEBUG_MAILMAP 0
7#if DEBUG_MAILMAP
8#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
fbfba7ad 9#define debug_str(X) ((X) ? (X) : "(none)")
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10#else
11static inline void debug_mm(const char *format, ...) {}
fbfba7ad 12static inline const char *debug_str(const char *s) { return s; }
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13#endif
14
d551a488 15const char *git_mailmap_file;
08610900 16const char *git_mailmap_blob;
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17
18struct mailmap_info {
19 char *name;
20 char *email;
21};
22
23struct 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
32static void free_mailmap_info(void *p, const char *s)
33{
34 struct mailmap_info *mi = (struct mailmap_info *)p;
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35 debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n",
36 s, debug_str(mi->name), debug_str(mi->email));
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37 free(mi->name);
38 free(mi->email);
39}
40
41static void free_mailmap_entry(void *p, const char *s)
42{
43 struct mailmap_entry *me = (struct mailmap_entry *)p;
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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));
fbfba7ad 48
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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
de2f95eb
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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 */
65static int namemap_cmp(const char *a, const char *b)
66{
67 return strcasecmp(a, b);
68}
69
0925ce4d 70static void add_mapping(struct string_list *map,
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71 char *new_name, char *new_email,
72 char *old_name, char *old_email)
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73{
74 struct mailmap_entry *me;
63226218 75 struct string_list_item *item;
bf637803 76
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77 if (old_email == NULL) {
78 old_email = new_email;
79 new_email = NULL;
80 }
81
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82 item = string_list_insert(map, old_email);
83 if (item->util) {
84 me = (struct mailmap_entry *)item->util;
0925ce4d 85 } else {
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86 me = xcalloc(1, sizeof(struct mailmap_entry));
87 me->namemap.strdup_strings = 1;
de2f95eb 88 me->namemap.cmp = namemap_cmp;
97e751be 89 item->util = me;
0925ce4d 90 }
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91
92 if (old_name == NULL) {
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93 debug_mm("mailmap: adding (simple) entry for '%s'\n", old_email);
94
0925ce4d 95 /* Replace current name and new email for simple entry */
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96 if (new_name) {
97 free(me->name);
0925ce4d 98 me->name = xstrdup(new_name);
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99 }
100 if (new_email) {
101 free(me->email);
0925ce4d 102 me->email = xstrdup(new_email);
d8d2eb7d 103 }
0925ce4d 104 } else {
74b531f6 105 struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
63226218 106 debug_mm("mailmap: adding (complex) entry for '%s'\n", old_email);
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107 mi->name = xstrdup_or_null(new_name);
108 mi->email = xstrdup_or_null(new_email);
78a395d3 109 string_list_insert(&me->namemap, old_name)->util = mi;
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110 }
111
112 debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
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113 debug_str(old_name), old_email,
114 debug_str(new_name), debug_str(new_email));
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115}
116
5288dd58 117static char *parse_name_and_email(char *buffer, char **name,
bd237945 118 char **email, int allow_empty_email)
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119{
120 char *left, *right, *nstart, *nend;
2af202be 121 *name = *email = NULL;
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122
123 if ((left = strchr(buffer, '<')) == NULL)
124 return NULL;
125 if ((right = strchr(left+1, '>')) == NULL)
126 return NULL;
5288dd58 127 if (!allow_empty_email && (left+1 == right))
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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;
3174bc5c 135 while (nend > nstart && isspace(*nend))
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136 --nend;
137
8c381151 138 *name = (nstart <= nend ? nstart : NULL);
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139 *email = left+1;
140 *(nend+1) = '\0';
141 *right++ = '\0';
142
143 return (*right == '\0' ? NULL : right);
144}
145
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146static 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
c9ba31f5 163 free(*repo_abbrev);
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164
165 for (cp = buffer + abblen; isspace(*cp); cp++)
166 ; /* nothing */
c978610d 167 *repo_abbrev = xstrdup(cp);
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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
178static int read_mailmap_file(struct string_list *map, const char *filename,
179 char **repo_abbrev)
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180{
181 char buffer[1024];
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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;
60901e4c 191 return error_errno("unable to open mailmap at %s", filename);
938a60d6 192 }
7c1c6782 193
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194 while (fgets(buffer, sizeof(buffer), f) != NULL)
195 read_mailmap_line(map, buffer, repo_abbrev);
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196 fclose(f);
197 return 0;
198}
199
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200static void read_mailmap_string(struct string_list *map, char *buf,
201 char **repo_abbrev)
08610900 202{
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203 while (*buf) {
204 char *end = strchrnul(buf, '\n');
08610900 205
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206 if (*end)
207 *end++ = '\0';
08610900 208
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209 read_mailmap_line(map, buf, repo_abbrev);
210 buf = end;
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211 }
212}
213
214static int read_mailmap_blob(struct string_list *map,
215 const char *name,
216 char **repo_abbrev)
217{
15be4a5d 218 struct object_id oid;
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219 char *buf;
220 unsigned long size;
221 enum object_type type;
222
223 if (!name)
938a60d6 224 return 0;
15be4a5d 225 if (get_oid(name, &oid) < 0)
938a60d6 226 return 0;
08610900 227
b4f5aca4 228 buf = read_object_file(&oid, &type, &size);
08610900 229 if (!buf)
938a60d6 230 return error("unable to read mailmap object at %s", name);
08610900 231 if (type != OBJ_BLOB)
938a60d6 232 return error("mailmap is not a blob: %s", name);
08610900 233
f972a165 234 read_mailmap_string(map, buf, repo_abbrev);
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235
236 free(buf);
237 return 0;
238}
239
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240int read_mailmap(struct string_list *map, char **repo_abbrev)
241{
938a60d6 242 int err = 0;
8c473cec 243
0925ce4d 244 map->strdup_strings = 1;
de2f95eb 245 map->cmp = namemap_cmp;
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246
247 if (!git_mailmap_blob && is_bare_repository())
248 git_mailmap_blob = "HEAD:.mailmap";
249
938a60d6 250 err |= read_mailmap_file(map, ".mailmap", repo_abbrev);
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251 if (startup_info->have_repository)
252 err |= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
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253 err |= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
254 return err;
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255}
256
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257void 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
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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 */
269static 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
0925ce4d 316int map_user(struct string_list *map,
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317 const char **email, size_t *emaillen,
318 const char **name, size_t *namelen)
7c1c6782 319{
c455c87c 320 struct string_list_item *item;
0925ce4d 321 struct mailmap_entry *me;
388c7f8a 322
ea02ffa3 323 debug_mm("map_user: map '%.*s' <%.*s>\n",
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324 (int)*namelen, debug_str(*name),
325 (int)*emaillen, debug_str(*email));
388c7f8a 326
ea02ffa3 327 item = lookup_prefix(map, *email, *emaillen);
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328 if (item != NULL) {
329 me = (struct mailmap_entry *)item->util;
330 if (me->namemap.nr) {
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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 */
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336 struct string_list_item *subitem;
337 subitem = lookup_prefix(&me->namemap, *name, *namelen);
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338 if (subitem)
339 item = subitem;
340 }
341 }
7c1c6782 342 if (item != NULL) {
0925ce4d 343 struct mailmap_info *mi = (struct mailmap_info *)item->util;
ea02ffa3 344 if (mi->name == NULL && mi->email == NULL) {
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345 debug_mm("map_user: -- (no simple mapping)\n");
346 return 0;
347 }
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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 }
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356 debug_mm("map_user: to '%.*s' <%.*s>\n",
357 (int)*namelen, debug_str(*name),
358 (int)*emaillen, debug_str(*email));
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359 return 1;
360 }
0925ce4d 361 debug_mm("map_user: --\n");
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362 return 0;
363}