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#include "cache.h"
#include "string-list.h"
#include "mailmap.h"
#define DEBUG_MAILMAP 0
#if DEBUG_MAILMAP
#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
#else
static inline void debug_mm(const char *format, ...) {}
#endif
const char *git_mailmap_file;
const char *git_mailmap_blob;
struct mailmap_info {
char *name;
char *email;
};
struct mailmap_entry {
/* name and email for the simple mail-only case */
char *name;
char *email;
/* name and email for the complex mail and name matching case */
struct string_list namemap;
};
static void free_mailmap_info(void *p, const char *s)
{
struct mailmap_info *mi = (struct mailmap_info *)p;
debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n", s, mi->name, mi->email);
free(mi->name);
free(mi->email);
}
static void free_mailmap_entry(void *p, const char *s)
{
struct mailmap_entry *me = (struct mailmap_entry *)p;
debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n", s, me->namemap.nr);
debug_mm("mailmap: - simple: '%s' <%s>\n", me->name, me->email);
free(me->name);
free(me->email);
me->namemap.strdup_strings = 1;
string_list_clear_func(&me->namemap, free_mailmap_info);
}
static void add_mapping(struct string_list *map,
char *new_name, char *new_email, char *old_name, char *old_email)
{
struct mailmap_entry *me;
int index;
char *p;
if (old_email)
for (p = old_email; *p; p++)
*p = tolower(*p);
if (new_email)
for (p = new_email; *p; p++)
*p = tolower(*p);
if (old_email == NULL) {
old_email = new_email;
new_email = NULL;
}
if ((index = string_list_find_insert_index(map, old_email, 1)) < 0) {
/* mailmap entry exists, invert index value */
index = -1 - index;
} else {
/* create mailmap entry */
struct string_list_item *item = string_list_insert_at_index(map, index, old_email);
item->util = xcalloc(1, sizeof(struct mailmap_entry));
((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
}
me = (struct mailmap_entry *)map->items[index].util;
if (old_name == NULL) {
debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
/* Replace current name and new email for simple entry */
if (new_name) {
free(me->name);
me->name = xstrdup(new_name);
}
if (new_email) {
free(me->email);
me->email = xstrdup(new_email);
}
} else {
struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
if (new_name)
mi->name = xstrdup(new_name);
if (new_email)
mi->email = xstrdup(new_email);
string_list_insert(&me->namemap, old_name)->util = mi;
}
debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
old_name, old_email, new_name, new_email);
}
static char *parse_name_and_email(char *buffer, char **name,
char **email, int allow_empty_email)
{
char *left, *right, *nstart, *nend;
*name = *email = NULL;
if ((left = strchr(buffer, '<')) == NULL)
return NULL;
if ((right = strchr(left+1, '>')) == NULL)
return NULL;
if (!allow_empty_email && (left+1 == right))
return NULL;
/* remove whitespace from beginning and end of name */
nstart = buffer;
while (isspace(*nstart) && nstart < left)
++nstart;
nend = left-1;
while (nend > nstart && isspace(*nend))
--nend;
*name = (nstart < nend ? nstart : NULL);
*email = left+1;
*(nend+1) = '\0';
*right++ = '\0';
return (*right == '\0' ? NULL : right);
}
static void read_mailmap_line(struct string_list *map, char *buffer,
char **repo_abbrev)
{
char *name1 = NULL, *email1 = NULL, *name2 = NULL, *email2 = NULL;
if (buffer[0] == '#') {
static const char abbrev[] = "# repo-abbrev:";
int abblen = sizeof(abbrev) - 1;
int len = strlen(buffer);
if (!repo_abbrev)
return;
if (len && buffer[len - 1] == '\n')
buffer[--len] = 0;
if (!strncmp(buffer, abbrev, abblen)) {
char *cp;
if (repo_abbrev)
free(*repo_abbrev);
*repo_abbrev = xmalloc(len);
for (cp = buffer + abblen; isspace(*cp); cp++)
; /* nothing */
strcpy(*repo_abbrev, cp);
}
return;
}
if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
parse_name_and_email(name2, &name2, &email2, 1);
if (email1)
add_mapping(map, name1, email1, name2, email2);
}
static int read_mailmap_file(struct string_list *map, const char *filename,
char **repo_abbrev)
{
char buffer[1024];
FILE *f;
if (!filename)
return 0;
f = fopen(filename, "r");
if (!f) {
if (errno == ENOENT)
return 0;
return error("unable to open mailmap at %s: %s",
filename, strerror(errno));
}
while (fgets(buffer, sizeof(buffer), f) != NULL)
read_mailmap_line(map, buffer, repo_abbrev);
fclose(f);
return 0;
}
static void read_mailmap_buf(struct string_list *map,
const char *buf, unsigned long len,
char **repo_abbrev)
{
while (len) {
const char *end = strchrnul(buf, '\n');
unsigned long linelen = end - buf + 1;
char *line = xmemdupz(buf, linelen);
read_mailmap_line(map, line, repo_abbrev);
free(line);
buf += linelen;
len -= linelen;
}
}
static int read_mailmap_blob(struct string_list *map,
const char *name,
char **repo_abbrev)
{
unsigned char sha1[20];
char *buf;
unsigned long size;
enum object_type type;
if (!name)
return 0;
if (get_sha1(name, sha1) < 0)
return 0;
buf = read_sha1_file(sha1, &type, &size);
if (!buf)
return error("unable to read mailmap object at %s", name);
if (type != OBJ_BLOB)
return error("mailmap is not a blob: %s", name);
read_mailmap_buf(map, buf, size, repo_abbrev);
free(buf);
return 0;
}
int read_mailmap(struct string_list *map, char **repo_abbrev)
{
int err = 0;
map->strdup_strings = 1;
map->cmp = strcasecmp;
if (!git_mailmap_blob && is_bare_repository())
git_mailmap_blob = "HEAD:.mailmap";
err |= read_mailmap_file(map, ".mailmap", repo_abbrev);
err |= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
err |= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
return err;
}
void clear_mailmap(struct string_list *map)
{
debug_mm("mailmap: clearing %d entries...\n", map->nr);
map->strdup_strings = 1;
string_list_clear_func(map, free_mailmap_entry);
debug_mm("mailmap: cleared\n");
}
/*
* Look for an entry in map that match string[0:len]; string[len]
* does not have to be NUL (but it could be).
*/
static struct string_list_item *lookup_prefix(struct string_list *map,
const char *string, size_t len)
{
int i = string_list_find_insert_index(map, string, 1);
if (i < 0) {
/* exact match */
i = -1 - i;
if (!string[len])
return &map->items[i];
/*
* that map entry matches exactly to the string, including
* the cruft at the end beyond "len". That is not a match
* with string[0:len] that we are looking for.
*/
} else if (!string[len]) {
/*
* asked with the whole string, and got nothing. No
* matching entry can exist in the map.
*/
return NULL;
}
/*
* i is at the exact match to an overlong key, or location the
* overlong key would be inserted, which must come after the
* real location of the key if one exists.
*/
while (0 <= --i && i < map->nr) {
int cmp = strncasecmp(map->items[i].string, string, len);
if (cmp < 0)
/*
* "i" points at a key definitely below the prefix;
* the map does not have string[0:len] in it.
*/
break;
else if (!cmp && !map->items[i].string[len])
/* found it */
return &map->items[i];
/*
* otherwise, the string at "i" may be string[0:len]
* followed by a string that sorts later than string[len:];
* keep trying.
*/
}
return NULL;
}
int map_user(struct string_list *map,
const char **email, size_t *emaillen,
const char **name, size_t *namelen)
{
struct string_list_item *item;
struct mailmap_entry *me;
debug_mm("map_user: map '%.*s' <%.*s>\n",
*name, *namelen, *emaillen, *email);
item = lookup_prefix(map, *email, *emaillen);
if (item != NULL) {
me = (struct mailmap_entry *)item->util;
if (me->namemap.nr) {
/* The item has multiple items, so we'll look up on name too */
/* If the name is not found, we choose the simple entry */
struct string_list_item *subitem;
subitem = lookup_prefix(&me->namemap, *name, *namelen);
if (subitem)
item = subitem;
}
}
if (item != NULL) {
struct mailmap_info *mi = (struct mailmap_info *)item->util;
if (mi->name == NULL && mi->email == NULL) {
debug_mm("map_user: -- (no simple mapping)\n");
return 0;
}
if (mi->email) {
*email = mi->email;
*emaillen = strlen(*email);
}
if (mi->name) {
*name = mi->name;
*namelen = strlen(*name);
}
debug_mm("map_user: to '%.*s' <.*%s>\n", *namelen, *name,
*emaillen, *email);
return 1;
}
debug_mm("map_user: --\n");
return 0;
}
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