[thirdparty/git.git] / mailmap.c

#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;

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 int read_single_mailmap(struct string_list *map, const char *filename, char **repo_abbrev)
{
	char buffer[1024];
	FILE *f = (filename == NULL ? NULL : fopen(filename, "r"));

	if (f == NULL)
		return 1;
	while (fgets(buffer, sizeof(buffer), f) != NULL) {
		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)
				continue;

			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);
			}
			continue;
		}
		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);
	}
	fclose(f);
	return 0;
}

int read_mailmap(struct string_list *map, char **repo_abbrev)
{
	map->strdup_strings = 1;
	/* each failure returns 1, so >1 means both calls failed */
	return read_single_mailmap(map, ".mailmap", repo_abbrev) +
	       read_single_mailmap(map, git_mailmap_file, repo_abbrev) > 1;
}

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");
}

int map_user(struct string_list *map,
	     char *email, int maxlen_email, char *name, int maxlen_name)
{
	char *end_of_email;
	struct string_list_item *item;
	struct mailmap_entry *me;
	char buf[1024], *mailbuf;
	int i;

	/* figure out space requirement for email */
	end_of_email = strchr(email, '>');
	if (!end_of_email) {
		/* email passed in might not be wrapped in <>, but end with a \0 */
		end_of_email = memchr(email, '\0', maxlen_email);
		if (!end_of_email)
			return 0;
	}
	if (end_of_email - email + 1 < sizeof(buf))
		mailbuf = buf;
	else
		mailbuf = xmalloc(end_of_email - email + 1);

	/* downcase the email address */
	for (i = 0; i < end_of_email - email; i++)
		mailbuf[i] = tolower(email[i]);
	mailbuf[i] = 0;

	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
	item = string_list_lookup(map, mailbuf);
	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 = string_list_lookup(&me->namemap, name);
			if (subitem)
				item = subitem;
		}
	}
	if (mailbuf != buf)
		free(mailbuf);
	if (item != NULL) {
		struct mailmap_info *mi = (struct mailmap_info *)item->util;
		if (mi->name == NULL && (mi->email == NULL || maxlen_email == 0)) {
			debug_mm("map_user:  -- (no simple mapping)\n");
			return 0;
		}
		if (maxlen_email && mi->email)
			strlcpy(email, mi->email, maxlen_email);
		else
			*end_of_email = '\0';
		if (maxlen_name && mi->name)
			strlcpy(name, mi->name, maxlen_name);
		debug_mm("map_user:  to '%s' <%s>\n", name, mi->email ? mi->email : "");
		return 1;
	}
	debug_mm("map_user:  --\n");
	return 0;
}
Commit	Line	Data
7c1c6782	1	#include "cache.h"
c455c87c	2	#include "string-list.h"
fe5d30b6	3	#include "mailmap.h"
7c1c6782	4
0925ce4d MSO	5	#define DEBUG_MAILMAP 0
	6	#if DEBUG_MAILMAP
	7	#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
	8	#else
	9	static inline void debug_mm(const char *format, ...) {}
	10	#endif
	11
d551a488	12	const char *git_mailmap_file;
0925ce4d MSO	13
	14	struct mailmap_info {
	15	char *name;
	16	char *email;
	17	};
	18
	19	struct mailmap_entry {
	20	/* name and email for the simple mail-only case */
	21	char *name;
	22	char *email;
	23
	24	/* name and email for the complex mail and name matching case */
	25	struct string_list namemap;
	26	};
	27
	28	static void free_mailmap_info(void p, const char s)
	29	{
	30	struct mailmap_info mi = (struct mailmap_info )p;
	31	debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n", s, mi->name, mi->email);
	32	free(mi->name);
	33	free(mi->email);
	34	}
	35
	36	static void free_mailmap_entry(void p, const char s)
	37	{
	38	struct mailmap_entry me = (struct mailmap_entry )p;
	39	debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n", s, me->namemap.nr);
	40	debug_mm("mailmap: - simple: '%s' <%s>\n", me->name, me->email);
	41	free(me->name);
	42	free(me->email);
	43
	44	me->namemap.strdup_strings = 1;
	45	string_list_clear_func(&me->namemap, free_mailmap_info);
	46	}
	47
	48	static void add_mapping(struct string_list *map,
	49	char new_name, char new_email, char old_name, char old_email)
	50	{
	51	struct mailmap_entry *me;
	52	int index;
bf637803 JS	53	char *p;
	54
	55	if (old_email)
	56	for (p = old_email; *p; p++)
	57	p = tolower(p);
	58	if (new_email)
	59	for (p = new_email; *p; p++)
	60	p = tolower(p);
	61
0925ce4d MSO	62	if (old_email == NULL) {
	63	old_email = new_email;
	64	new_email = NULL;
	65	}
	66
	67	if ((index = string_list_find_insert_index(map, old_email, 1)) < 0) {
	68	/* mailmap entry exists, invert index value */
	69	index = -1 - index;
	70	} else {
	71	/* create mailmap entry */
aadceea6	72	struct string_list_item *item = string_list_insert_at_index(map, index, old_email);
74b531f6	73	item->util = xcalloc(1, sizeof(struct mailmap_entry));
0925ce4d MSO	74	((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
	75	}
	76	me = (struct mailmap_entry *)map->items[index].util;
	77
	78	if (old_name == NULL) {
	79	debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
	80	/* Replace current name and new email for simple entry */
d8d2eb7d JM	81	if (new_name) {
d8d2eb7d JM	82	free(me->name);
0925ce4d	83	me->name = xstrdup(new_name);
d8d2eb7d JM	84	}
	85	if (new_email) {
	86	free(me->email);
0925ce4d	87	me->email = xstrdup(new_email);
d8d2eb7d	88	}
0925ce4d	89	} else {
74b531f6	90	struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
0925ce4d MSO	91	debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
	92	if (new_name)
	93	mi->name = xstrdup(new_name);
	94	if (new_email)
	95	mi->email = xstrdup(new_email);
78a395d3	96	string_list_insert(&me->namemap, old_name)->util = mi;
0925ce4d MSO	97	}
	98
	99	debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
	100	old_name, old_email, new_name, new_email);
	101	}
	102
5288dd58 BS	103	static char parse_name_and_email(char buffer, char **name,
5288dd58 BS	104	char **email, int allow_empty_email)
0925ce4d MSO	105	{
0925ce4d MSO	106	char left, right, nstart, nend;
2af202be	107	name = email = NULL;
0925ce4d MSO	108
	109	if ((left = strchr(buffer, '<')) == NULL)
	110	return NULL;
	111	if ((right = strchr(left+1, '>')) == NULL)
	112	return NULL;
5288dd58	113	if (!allow_empty_email && (left+1 == right))
0925ce4d MSO	114	return NULL;
	115
	116	/* remove whitespace from beginning and end of name */
	117	nstart = buffer;
	118	while (isspace(*nstart) && nstart < left)
	119	++nstart;
	120	nend = left-1;
3174bc5c	121	while (nend > nstart && isspace(*nend))
0925ce4d MSO	122	--nend;
	123
	124	*name = (nstart < nend ? nstart : NULL);
	125	*email = left+1;
	126	*(nend+1) = '\0';
	127	*right++ = '\0';
	128
	129	return (*right == '\0' ? NULL : right);
	130	}
	131
d551a488	132	static int read_single_mailmap(struct string_list map, const char filename, char **repo_abbrev)
7c1c6782 JH	133	{
7c1c6782 JH	134	char buffer[1024];
d551a488	135	FILE *f = (filename == NULL ? NULL : fopen(filename, "r"));
7c1c6782 JH	136
	137	if (f == NULL)
	138	return 1;
	139	while (fgets(buffer, sizeof(buffer), f) != NULL) {
2af202be	140	char name1 = NULL, email1 = NULL, name2 = NULL, email2 = NULL;
7c1c6782 JH	141	if (buffer[0] == '#') {
	142	static const char abbrev[] = "# repo-abbrev:";
	143	int abblen = sizeof(abbrev) - 1;
	144	int len = strlen(buffer);
	145
8503ee43 AR	146	if (!repo_abbrev)
	147	continue;
	148
7c1c6782 JH	149	if (len && buffer[len - 1] == '\n')
	150	buffer[--len] = 0;
	151	if (!strncmp(buffer, abbrev, abblen)) {
	152	char *cp;
	153
	154	if (repo_abbrev)
	155	free(*repo_abbrev);
	156	*repo_abbrev = xmalloc(len);
	157
	158	for (cp = buffer + abblen; isspace(*cp); cp++)
	159	; /* nothing */
	160	strcpy(*repo_abbrev, cp);
	161	}
	162	continue;
	163	}
5288dd58 BS	164	if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
5288dd58 BS	165	parse_name_and_email(name2, &name2, &email2, 1);
0925ce4d MSO	166
	167	if (email1)
	168	add_mapping(map, name1, email1, name2, email2);
7c1c6782 JH	169	}
	170	fclose(f);
	171	return 0;
	172	}
	173
d551a488 MSO	174	int read_mailmap(struct string_list map, char *repo_abbrev)
d551a488 MSO	175	{
0925ce4d	176	map->strdup_strings = 1;
d551a488 MSO	177	/* each failure returns 1, so >1 means both calls failed */
	178	return read_single_mailmap(map, ".mailmap", repo_abbrev) +
	179	read_single_mailmap(map, git_mailmap_file, repo_abbrev) > 1;
	180	}
	181
0925ce4d MSO	182	void clear_mailmap(struct string_list *map)
	183	{
	184	debug_mm("mailmap: clearing %d entries...\n", map->nr);
	185	map->strdup_strings = 1;
	186	string_list_clear_func(map, free_mailmap_entry);
	187	debug_mm("mailmap: cleared\n");
	188	}
	189
	190	int map_user(struct string_list *map,
	191	char email, int maxlen_email, char name, int maxlen_name)
7c1c6782	192	{
f026358e	193	char *end_of_email;
c455c87c	194	struct string_list_item *item;
0925ce4d	195	struct mailmap_entry *me;
7c1c6782 JH	196	char buf[1024], *mailbuf;
	197	int i;
	198
0925ce4d	199	/* figure out space requirement for email */
f026358e JH	200	end_of_email = strchr(email, '>');
f026358e JH	201	if (!end_of_email) {
0925ce4d	202	/* email passed in might not be wrapped in <>, but end with a \0 */
f026358e JH	203	end_of_email = memchr(email, '\0', maxlen_email);
f026358e JH	204	if (!end_of_email)
0925ce4d MSO	205	return 0;
0925ce4d MSO	206	}
f026358e	207	if (end_of_email - email + 1 < sizeof(buf))
7c1c6782 JH	208	mailbuf = buf;
7c1c6782 JH	209	else
f026358e	210	mailbuf = xmalloc(end_of_email - email + 1);
7c1c6782 JH	211
7c1c6782 JH	212	/* downcase the email address */
f026358e	213	for (i = 0; i < end_of_email - email; i++)
7c1c6782 JH	214	mailbuf[i] = tolower(email[i]);
7c1c6782 JH	215	mailbuf[i] = 0;
0925ce4d MSO	216
0925ce4d MSO	217	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
e8c8b713	218	item = string_list_lookup(map, mailbuf);
0925ce4d MSO	219	if (item != NULL) {
	220	me = (struct mailmap_entry *)item->util;
	221	if (me->namemap.nr) {
	222	/* The item has multiple items, so we'll look up on name too */
	223	/* If the name is not found, we choose the simple entry */
e8c8b713	224	struct string_list_item *subitem = string_list_lookup(&me->namemap, name);
0925ce4d MSO	225	if (subitem)
	226	item = subitem;
	227	}
	228	}
7c1c6782 JH	229	if (mailbuf != buf)
	230	free(mailbuf);
	231	if (item != NULL) {
0925ce4d MSO	232	struct mailmap_info mi = (struct mailmap_info )item->util;
	233	if (mi->name == NULL && (mi->email == NULL \|\| maxlen_email == 0)) {
	234	debug_mm("map_user: -- (no simple mapping)\n");
	235	return 0;
	236	}
	237	if (maxlen_email && mi->email)
	238	strlcpy(email, mi->email, maxlen_email);
f026358e JH	239	else
f026358e JH	240	*end_of_email = '\0';
0925ce4d MSO	241	if (maxlen_name && mi->name)
	242	strlcpy(name, mi->name, maxlen_name);
	243	debug_mm("map_user: to '%s' <%s>\n", name, mi->email ? mi->email : "");
7c1c6782 JH	244	return 1;
7c1c6782 JH	245	}
0925ce4d	246	debug_mm("map_user: --\n");
7c1c6782 JH	247	return 0;
7c1c6782 JH	248	}