[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;
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;
	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");
}

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;
08610900	13	const char *git_mailmap_blob;
0925ce4d MSO	14
	15	struct mailmap_info {
	16	char *name;
	17	char *email;
	18	};
	19
	20	struct mailmap_entry {
	21	/* name and email for the simple mail-only case */
	22	char *name;
	23	char *email;
	24
	25	/* name and email for the complex mail and name matching case */
	26	struct string_list namemap;
	27	};
	28
	29	static void free_mailmap_info(void p, const char s)
	30	{
	31	struct mailmap_info mi = (struct mailmap_info )p;
	32	debug_mm("mailmap: -- complex: '%s' -> '%s' <%s>\n", s, mi->name, mi->email);
	33	free(mi->name);
	34	free(mi->email);
	35	}
	36
	37	static void free_mailmap_entry(void p, const char s)
	38	{
	39	struct mailmap_entry me = (struct mailmap_entry )p;
	40	debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n", s, me->namemap.nr);
	41	debug_mm("mailmap: - simple: '%s' <%s>\n", me->name, me->email);
	42	free(me->name);
	43	free(me->email);
	44
	45	me->namemap.strdup_strings = 1;
	46	string_list_clear_func(&me->namemap, free_mailmap_info);
	47	}
	48
	49	static void add_mapping(struct string_list *map,
	50	char new_name, char new_email, char old_name, char old_email)
	51	{
	52	struct mailmap_entry *me;
	53	int index;
bf637803 JS	54	char *p;
	55
	56	if (old_email)
	57	for (p = old_email; *p; p++)
	58	p = tolower(p);
	59	if (new_email)
	60	for (p = new_email; *p; p++)
	61	p = tolower(p);
	62
0925ce4d MSO	63	if (old_email == NULL) {
	64	old_email = new_email;
	65	new_email = NULL;
	66	}
	67
	68	if ((index = string_list_find_insert_index(map, old_email, 1)) < 0) {
	69	/* mailmap entry exists, invert index value */
	70	index = -1 - index;
	71	} else {
	72	/* create mailmap entry */
aadceea6	73	struct string_list_item *item = string_list_insert_at_index(map, index, old_email);
74b531f6	74	item->util = xcalloc(1, sizeof(struct mailmap_entry));
0925ce4d MSO	75	((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
	76	}
	77	me = (struct mailmap_entry *)map->items[index].util;
	78
	79	if (old_name == NULL) {
	80	debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
	81	/* Replace current name and new email for simple entry */
d8d2eb7d JM	82	if (new_name) {
d8d2eb7d JM	83	free(me->name);
0925ce4d	84	me->name = xstrdup(new_name);
d8d2eb7d JM	85	}
	86	if (new_email) {
	87	free(me->email);
0925ce4d	88	me->email = xstrdup(new_email);
d8d2eb7d	89	}
0925ce4d	90	} else {
74b531f6	91	struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
0925ce4d MSO	92	debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
	93	if (new_name)
	94	mi->name = xstrdup(new_name);
	95	if (new_email)
	96	mi->email = xstrdup(new_email);
78a395d3	97	string_list_insert(&me->namemap, old_name)->util = mi;
0925ce4d MSO	98	}
	99
	100	debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
	101	old_name, old_email, new_name, new_email);
	102	}
	103
5288dd58 BS	104	static char parse_name_and_email(char buffer, char **name,
5288dd58 BS	105	char **email, int allow_empty_email)
0925ce4d MSO	106	{
0925ce4d MSO	107	char left, right, nstart, nend;
2af202be	108	name = email = NULL;
0925ce4d MSO	109
	110	if ((left = strchr(buffer, '<')) == NULL)
	111	return NULL;
	112	if ((right = strchr(left+1, '>')) == NULL)
	113	return NULL;
5288dd58	114	if (!allow_empty_email && (left+1 == right))
0925ce4d MSO	115	return NULL;
	116
	117	/* remove whitespace from beginning and end of name */
	118	nstart = buffer;
	119	while (isspace(*nstart) && nstart < left)
	120	++nstart;
	121	nend = left-1;
3174bc5c	122	while (nend > nstart && isspace(*nend))
0925ce4d MSO	123	--nend;
	124
	125	*name = (nstart < nend ? nstart : NULL);
	126	*email = left+1;
	127	*(nend+1) = '\0';
	128	*right++ = '\0';
	129
	130	return (*right == '\0' ? NULL : right);
	131	}
	132
7c8ce308 JK	133	static void read_mailmap_line(struct string_list map, char buffer,
	134	char **repo_abbrev)
	135	{
	136	char name1 = NULL, email1 = NULL, name2 = NULL, email2 = NULL;
	137	if (buffer[0] == '#') {
	138	static const char abbrev[] = "# repo-abbrev:";
	139	int abblen = sizeof(abbrev) - 1;
	140	int len = strlen(buffer);
	141
	142	if (!repo_abbrev)
	143	return;
	144
	145	if (len && buffer[len - 1] == '\n')
	146	buffer[--len] = 0;
	147	if (!strncmp(buffer, abbrev, abblen)) {
	148	char *cp;
	149
	150	if (repo_abbrev)
	151	free(*repo_abbrev);
	152	*repo_abbrev = xmalloc(len);
	153
	154	for (cp = buffer + abblen; isspace(*cp); cp++)
	155	; /* nothing */
	156	strcpy(*repo_abbrev, cp);
	157	}
	158	return;
	159	}
	160	if ((name2 = parse_name_and_email(buffer, &name1, &email1, 0)) != NULL)
	161	parse_name_and_email(name2, &name2, &email2, 1);
	162
	163	if (email1)
	164	add_mapping(map, name1, email1, name2, email2);
	165	}
	166
	167	static int read_mailmap_file(struct string_list map, const char filename,
	168	char **repo_abbrev)
7c1c6782 JH	169	{
7c1c6782 JH	170	char buffer[1024];
938a60d6 JK	171	FILE *f;
	172
	173	if (!filename)
	174	return 0;
	175
	176	f = fopen(filename, "r");
	177	if (!f) {
	178	if (errno == ENOENT)
	179	return 0;
	180	return error("unable to open mailmap at %s: %s",
	181	filename, strerror(errno));
	182	}
7c1c6782	183
7c8ce308 JK	184	while (fgets(buffer, sizeof(buffer), f) != NULL)
7c8ce308 JK	185	read_mailmap_line(map, buffer, repo_abbrev);
7c1c6782 JH	186	fclose(f);
	187	return 0;
	188	}
	189
08610900 JK	190	static void read_mailmap_buf(struct string_list *map,
	191	const char *buf, unsigned long len,
	192	char **repo_abbrev)
	193	{
	194	while (len) {
	195	const char *end = strchrnul(buf, '\n');
	196	unsigned long linelen = end - buf + 1;
	197	char *line = xmemdupz(buf, linelen);
	198
	199	read_mailmap_line(map, line, repo_abbrev);
	200
	201	free(line);
	202	buf += linelen;
	203	len -= linelen;
	204	}
	205	}
	206
	207	static int read_mailmap_blob(struct string_list *map,
	208	const char *name,
	209	char **repo_abbrev)
	210	{
	211	unsigned char sha1[20];
	212	char *buf;
	213	unsigned long size;
	214	enum object_type type;
	215
	216	if (!name)
938a60d6	217	return 0;
08610900	218	if (get_sha1(name, sha1) < 0)
938a60d6	219	return 0;
08610900 JK	220
	221	buf = read_sha1_file(sha1, &type, &size);
	222	if (!buf)
938a60d6	223	return error("unable to read mailmap object at %s", name);
08610900	224	if (type != OBJ_BLOB)
938a60d6	225	return error("mailmap is not a blob: %s", name);
08610900 JK	226
	227	read_mailmap_buf(map, buf, size, repo_abbrev);
	228
	229	free(buf);
	230	return 0;
	231	}
	232
d551a488 MSO	233	int read_mailmap(struct string_list map, char *repo_abbrev)
d551a488 MSO	234	{
938a60d6	235	int err = 0;
0925ce4d	236	map->strdup_strings = 1;
938a60d6 JK	237	err \|= read_mailmap_file(map, ".mailmap", repo_abbrev);
	238	err \|= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
	239	err \|= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
	240	return err;
d551a488 MSO	241	}
d551a488 MSO	242
0925ce4d MSO	243	void clear_mailmap(struct string_list *map)
	244	{
	245	debug_mm("mailmap: clearing %d entries...\n", map->nr);
	246	map->strdup_strings = 1;
	247	string_list_clear_func(map, free_mailmap_entry);
	248	debug_mm("mailmap: cleared\n");
	249	}
	250
	251	int map_user(struct string_list *map,
	252	char email, int maxlen_email, char name, int maxlen_name)
7c1c6782	253	{
f026358e	254	char *end_of_email;
c455c87c	255	struct string_list_item *item;
0925ce4d	256	struct mailmap_entry *me;
7c1c6782 JH	257	char buf[1024], *mailbuf;
	258	int i;
	259
0925ce4d	260	/* figure out space requirement for email */
f026358e JH	261	end_of_email = strchr(email, '>');
f026358e JH	262	if (!end_of_email) {
0925ce4d	263	/* email passed in might not be wrapped in <>, but end with a \0 */
f026358e JH	264	end_of_email = memchr(email, '\0', maxlen_email);
f026358e JH	265	if (!end_of_email)
0925ce4d MSO	266	return 0;
0925ce4d MSO	267	}
f026358e	268	if (end_of_email - email + 1 < sizeof(buf))
7c1c6782 JH	269	mailbuf = buf;
7c1c6782 JH	270	else
f026358e	271	mailbuf = xmalloc(end_of_email - email + 1);
7c1c6782 JH	272
7c1c6782 JH	273	/* downcase the email address */
f026358e	274	for (i = 0; i < end_of_email - email; i++)
7c1c6782 JH	275	mailbuf[i] = tolower(email[i]);
7c1c6782 JH	276	mailbuf[i] = 0;
0925ce4d MSO	277
0925ce4d MSO	278	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
e8c8b713	279	item = string_list_lookup(map, mailbuf);
0925ce4d MSO	280	if (item != NULL) {
	281	me = (struct mailmap_entry *)item->util;
	282	if (me->namemap.nr) {
	283	/* The item has multiple items, so we'll look up on name too */
	284	/* If the name is not found, we choose the simple entry */
e8c8b713	285	struct string_list_item *subitem = string_list_lookup(&me->namemap, name);
0925ce4d MSO	286	if (subitem)
	287	item = subitem;
	288	}
	289	}
7c1c6782 JH	290	if (mailbuf != buf)
	291	free(mailbuf);
	292	if (item != NULL) {
0925ce4d MSO	293	struct mailmap_info mi = (struct mailmap_info )item->util;
	294	if (mi->name == NULL && (mi->email == NULL \|\| maxlen_email == 0)) {
	295	debug_mm("map_user: -- (no simple mapping)\n");
	296	return 0;
	297	}
	298	if (maxlen_email && mi->email)
	299	strlcpy(email, mi->email, maxlen_email);
f026358e JH	300	else
f026358e JH	301	*end_of_email = '\0';
0925ce4d MSO	302	if (maxlen_name && mi->name)
	303	strlcpy(name, mi->name, maxlen_name);
	304	debug_mm("map_user: to '%s' <%s>\n", name, mi->email ? mi->email : "");
7c1c6782 JH	305	return 1;
7c1c6782 JH	306	}
0925ce4d	307	debug_mm("map_user: --\n");
7c1c6782 JH	308	return 0;
7c1c6782 JH	309	}