alloc: allow arbitrary repositories for alloc functions
[git/git.git] / mailmap.c
CommitLineData
7c1c6782 1#include "cache.h"
c455c87c 2#include "string-list.h"
fe5d30b6 3#include "mailmap.h"
7c1c6782 4
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5#define DEBUG_MAILMAP 0
6#if DEBUG_MAILMAP
7#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
fbfba7ad 8#define debug_str(X) ((X) ? (X) : "(none)")
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9#else
10static inline void debug_mm(const char *format, ...) {}
fbfba7ad 11static inline const char *debug_str(const char *s) { return s; }
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12#endif
13
d551a488 14const char *git_mailmap_file;
08610900 15const char *git_mailmap_blob;
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16
17struct mailmap_info {
18 char *name;
19 char *email;
20};
21
22struct mailmap_entry {
23 /* name and email for the simple mail-only case */
24 char *name;
25 char *email;
26
27 /* name and email for the complex mail and name matching case */
28 struct string_list namemap;
29};
30
31static void free_mailmap_info(void *p, const char *s)
32{
33 struct mailmap_info *mi = (struct mailmap_info *)p;
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34 debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n",
35 s, debug_str(mi->name), debug_str(mi->email));
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36 free(mi->name);
37 free(mi->email);
38}
39
40static void free_mailmap_entry(void *p, const char *s)
41{
42 struct mailmap_entry *me = (struct mailmap_entry *)p;
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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));
fbfba7ad 47
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48 free(me->name);
49 free(me->email);
50
51 me->namemap.strdup_strings = 1;
52 string_list_clear_func(&me->namemap, free_mailmap_info);
53}
54
de2f95eb
JH
55/*
56 * On some systems (e.g. MinGW 4.0), string.h has _only_ inline
57 * definition of strcasecmp and no non-inline implementation is
58 * supplied anywhere, which is, eh, "unusual"; we cannot take an
59 * address of such a function to store it in namemap.cmp. This is
60 * here as a workaround---do not assign strcasecmp directly to
61 * namemap.cmp until we know no systems that matter have such an
62 * "unusual" string.h.
63 */
64static int namemap_cmp(const char *a, const char *b)
65{
66 return strcasecmp(a, b);
67}
68
0925ce4d 69static void add_mapping(struct string_list *map,
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70 char *new_name, char *new_email,
71 char *old_name, char *old_email)
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72{
73 struct mailmap_entry *me;
63226218 74 struct string_list_item *item;
bf637803 75
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76 if (old_email == NULL) {
77 old_email = new_email;
78 new_email = NULL;
79 }
80
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81 item = string_list_insert(map, old_email);
82 if (item->util) {
83 me = (struct mailmap_entry *)item->util;
0925ce4d 84 } else {
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85 me = xcalloc(1, sizeof(struct mailmap_entry));
86 me->namemap.strdup_strings = 1;
de2f95eb 87 me->namemap.cmp = namemap_cmp;
97e751be 88 item->util = me;
0925ce4d 89 }
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90
91 if (old_name == NULL) {
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92 debug_mm("mailmap: adding (simple) entry for '%s'\n", old_email);
93
0925ce4d 94 /* Replace current name and new email for simple entry */
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95 if (new_name) {
96 free(me->name);
0925ce4d 97 me->name = xstrdup(new_name);
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98 }
99 if (new_email) {
100 free(me->email);
0925ce4d 101 me->email = xstrdup(new_email);
d8d2eb7d 102 }
0925ce4d 103 } else {
74b531f6 104 struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
63226218 105 debug_mm("mailmap: adding (complex) entry for '%s'\n", old_email);
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106 mi->name = xstrdup_or_null(new_name);
107 mi->email = xstrdup_or_null(new_email);
78a395d3 108 string_list_insert(&me->namemap, old_name)->util = mi;
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109 }
110
111 debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
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112 debug_str(old_name), old_email,
113 debug_str(new_name), debug_str(new_email));
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114}
115
5288dd58 116static char *parse_name_and_email(char *buffer, char **name,
bd237945 117 char **email, int allow_empty_email)
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118{
119 char *left, *right, *nstart, *nend;
2af202be 120 *name = *email = NULL;
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121
122 if ((left = strchr(buffer, '<')) == NULL)
123 return NULL;
124 if ((right = strchr(left+1, '>')) == NULL)
125 return NULL;
5288dd58 126 if (!allow_empty_email && (left+1 == right))
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127 return NULL;
128
129 /* remove whitespace from beginning and end of name */
130 nstart = buffer;
131 while (isspace(*nstart) && nstart < left)
132 ++nstart;
133 nend = left-1;
3174bc5c 134 while (nend > nstart && isspace(*nend))
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135 --nend;
136
8c381151 137 *name = (nstart <= nend ? nstart : NULL);
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138 *email = left+1;
139 *(nend+1) = '\0';
140 *right++ = '\0';
141
142 return (*right == '\0' ? NULL : right);
143}
144
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145static void read_mailmap_line(struct string_list *map, char *buffer,
146 char **repo_abbrev)
147{
148 char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
149 if (buffer[0] == '#') {
150 static const char abbrev[] = "# repo-abbrev:";
151 int abblen = sizeof(abbrev) - 1;
152 int len = strlen(buffer);
153
154 if (!repo_abbrev)
155 return;
156
157 if (len && buffer[len - 1] == '\n')
158 buffer[--len] = 0;
159 if (!strncmp(buffer, abbrev, abblen)) {
160 char *cp;
161
c9ba31f5 162 free(*repo_abbrev);
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163
164 for (cp = buffer + abblen; isspace(*cp); cp++)
165 ; /* nothing */
c978610d 166 *repo_abbrev = xstrdup(cp);
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167 }
168 return;
169 }
170 if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
171 parse_name_and_email(name2, &name2, &email2, 1);
172
173 if (email1)
174 add_mapping(map, name1, email1, name2, email2);
175}
176
177static int read_mailmap_file(struct string_list *map, const char *filename,
178 char **repo_abbrev)
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179{
180 char buffer[1024];
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181 FILE *f;
182
183 if (!filename)
184 return 0;
185
186 f = fopen(filename, "r");
187 if (!f) {
188 if (errno == ENOENT)
189 return 0;
60901e4c 190 return error_errno("unable to open mailmap at %s", filename);
938a60d6 191 }
7c1c6782 192
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193 while (fgets(buffer, sizeof(buffer), f) != NULL)
194 read_mailmap_line(map, buffer, repo_abbrev);
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195 fclose(f);
196 return 0;
197}
198
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199static void read_mailmap_string(struct string_list *map, char *buf,
200 char **repo_abbrev)
08610900 201{
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202 while (*buf) {
203 char *end = strchrnul(buf, '\n');
08610900 204
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205 if (*end)
206 *end++ = '\0';
08610900 207
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208 read_mailmap_line(map, buf, repo_abbrev);
209 buf = end;
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210 }
211}
212
213static int read_mailmap_blob(struct string_list *map,
214 const char *name,
215 char **repo_abbrev)
216{
15be4a5d 217 struct object_id oid;
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218 char *buf;
219 unsigned long size;
220 enum object_type type;
221
222 if (!name)
938a60d6 223 return 0;
15be4a5d 224 if (get_oid(name, &oid) < 0)
938a60d6 225 return 0;
08610900 226
b4f5aca4 227 buf = read_object_file(&oid, &type, &size);
08610900 228 if (!buf)
938a60d6 229 return error("unable to read mailmap object at %s", name);
08610900 230 if (type != OBJ_BLOB)
938a60d6 231 return error("mailmap is not a blob: %s", name);
08610900 232
f972a165 233 read_mailmap_string(map, buf, repo_abbrev);
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234
235 free(buf);
236 return 0;
237}
238
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239int read_mailmap(struct string_list *map, char **repo_abbrev)
240{
938a60d6 241 int err = 0;
8c473cec 242
0925ce4d 243 map->strdup_strings = 1;
de2f95eb 244 map->cmp = namemap_cmp;
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245
246 if (!git_mailmap_blob && is_bare_repository())
247 git_mailmap_blob = "HEAD:.mailmap";
248
938a60d6 249 err |= read_mailmap_file(map, ".mailmap", repo_abbrev);
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250 if (startup_info->have_repository)
251 err |= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
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252 err |= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
253 return err;
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254}
255
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256void clear_mailmap(struct string_list *map)
257{
258 debug_mm("mailmap: clearing %d entries...\n", map->nr);
259 map->strdup_strings = 1;
260 string_list_clear_func(map, free_mailmap_entry);
261 debug_mm("mailmap: cleared\n");
262}
263
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JH
264/*
265 * Look for an entry in map that match string[0:len]; string[len]
266 * does not have to be NUL (but it could be).
267 */
268static struct string_list_item *lookup_prefix(struct string_list *map,
269 const char *string, size_t len)
270{
271 int i = string_list_find_insert_index(map, string, 1);
272 if (i < 0) {
273 /* exact match */
274 i = -1 - i;
275 if (!string[len])
276 return &map->items[i];
277 /*
278 * that map entry matches exactly to the string, including
279 * the cruft at the end beyond "len". That is not a match
280 * with string[0:len] that we are looking for.
281 */
282 } else if (!string[len]) {
283 /*
284 * asked with the whole string, and got nothing. No
285 * matching entry can exist in the map.
286 */
287 return NULL;
288 }
289
290 /*
291 * i is at the exact match to an overlong key, or location the
292 * overlong key would be inserted, which must come after the
293 * real location of the key if one exists.
294 */
295 while (0 <= --i && i < map->nr) {
296 int cmp = strncasecmp(map->items[i].string, string, len);
297 if (cmp < 0)
298 /*
299 * "i" points at a key definitely below the prefix;
300 * the map does not have string[0:len] in it.
301 */
302 break;
303 else if (!cmp && !map->items[i].string[len])
304 /* found it */
305 return &map->items[i];
306 /*
307 * otherwise, the string at "i" may be string[0:len]
308 * followed by a string that sorts later than string[len:];
309 * keep trying.
310 */
311 }
312 return NULL;
313}
314
0925ce4d 315int map_user(struct string_list *map,
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316 const char **email, size_t *emaillen,
317 const char **name, size_t *namelen)
7c1c6782 318{
c455c87c 319 struct string_list_item *item;
0925ce4d 320 struct mailmap_entry *me;
388c7f8a 321
ea02ffa3 322 debug_mm("map_user: map '%.*s' <%.*s>\n",
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323 (int)*namelen, debug_str(*name),
324 (int)*emaillen, debug_str(*email));
388c7f8a 325
ea02ffa3 326 item = lookup_prefix(map, *email, *emaillen);
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327 if (item != NULL) {
328 me = (struct mailmap_entry *)item->util;
329 if (me->namemap.nr) {
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330 /*
331 * The item has multiple items, so we'll look up on
332 * name too. If the name is not found, we choose the
333 * simple entry.
334 */
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335 struct string_list_item *subitem;
336 subitem = lookup_prefix(&me->namemap, *name, *namelen);
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337 if (subitem)
338 item = subitem;
339 }
340 }
7c1c6782 341 if (item != NULL) {
0925ce4d 342 struct mailmap_info *mi = (struct mailmap_info *)item->util;
ea02ffa3 343 if (mi->name == NULL && mi->email == NULL) {
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344 debug_mm("map_user: -- (no simple mapping)\n");
345 return 0;
346 }
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347 if (mi->email) {
348 *email = mi->email;
349 *emaillen = strlen(*email);
350 }
351 if (mi->name) {
352 *name = mi->name;
353 *namelen = strlen(*name);
354 }
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355 debug_mm("map_user: to '%.*s' <%.*s>\n",
356 (int)*namelen, debug_str(*name),
357 (int)*emaillen, debug_str(*email));
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358 return 1;
359 }
0925ce4d 360 debug_mm("map_user: --\n");
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361 return 0;
362}