[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;
	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(index, old_email, map);
		item->util = xmalloc(sizeof(struct mailmap_entry));
		memset(item->util, 0, 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 */
		free(me->name);
		free(me->email);
		if (new_name)
			me->name = xstrdup(new_name);
		if (new_email)
			me->email = xstrdup(new_email);
	} else {
		struct mailmap_info *mi = xmalloc(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(old_name, &me->namemap)->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)
{
	char *left, *right, *nstart, *nend;
	*name = *email = 0;

	if ((left = strchr(buffer, '<')) == NULL)
		return NULL;
	if ((right = strchr(left+1, '>')) == NULL)
		return NULL;
	if (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 (isspace(*nend) && nend > nstart)
		--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 = 0, *email1 = 0, *name2 = 0, *email2 = 0;
		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)) != NULL)
			parse_name_and_email(name2, &name2, &email2);

		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 *p;
	struct string_list_item *item;
	struct mailmap_entry *me;
	char buf[1024], *mailbuf;
	int i;

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

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

	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
	item = string_list_lookup(mailbuf, map);
	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(name, &me->namemap);
			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);
		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;
}

int map_email(struct string_list *map, const char *email, char *name, int maxlen)
{
	return map_user(map, (char *)email, 0, name, maxlen);
}
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;
	53	if (old_email == NULL) {
	54	old_email = new_email;
	55	new_email = NULL;
	56	}
	57
	58	if ((index = string_list_find_insert_index(map, old_email, 1)) < 0) {
	59	/* mailmap entry exists, invert index value */
	60	index = -1 - index;
	61	} else {
	62	/* create mailmap entry */
	63	struct string_list_item *item = string_list_insert_at_index(index, old_email, map);
	64	item->util = xmalloc(sizeof(struct mailmap_entry));
	65	memset(item->util, 0, sizeof(struct mailmap_entry));
	66	((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
	67	}
	68	me = (struct mailmap_entry *)map->items[index].util;
	69
	70	if (old_name == NULL) {
	71	debug_mm("mailmap: adding (simple) entry for %s at index %d\n", old_email, index);
	72	/* Replace current name and new email for simple entry */
	73	free(me->name);
	74	free(me->email);
	75	if (new_name)
	76	me->name = xstrdup(new_name);
77	if (new_email)
78	me->email = xstrdup(new_email);
79	} else {
80	struct mailmap_info *mi = xmalloc(sizeof(struct mailmap_info));
81	debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
82	if (new_name)
83	mi->name = xstrdup(new_name);
84	if (new_email)
85	mi->email = xstrdup(new_email);
86	string_list_insert(old_name, &me->namemap)->util = mi;
87	}
88
89	debug_mm("mailmap: '%s' <%s> -> '%s' <%s>\n",
90	old_name, old_email, new_name, new_email);
91	}
92
93	static char parse_name_and_email(char buffer, char name, char email)
94	{
95	char left, right, nstart, nend;
96	name = email = 0;
97
98	if ((left = strchr(buffer, '<')) == NULL)
99	return NULL;
100	if ((right = strchr(left+1, '>')) == NULL)
101	return NULL;
102	if (left+1 == right)
103	return NULL;
104
105	/* remove whitespace from beginning and end of name */
106	nstart = buffer;
107	while (isspace(*nstart) && nstart < left)
108	++nstart;
109	nend = left-1;
110	while (isspace(*nend) && nend > nstart)
111	--nend;
112
113	*name = (nstart < nend ? nstart : NULL);
114	*email = left+1;
115	*(nend+1) = '\0';
116	*right++ = '\0';
117
118	return (*right == '\0' ? NULL : right);
119	}
120
d551a488	121	static int read_single_mailmap(struct string_list map, const char filename, char **repo_abbrev)
7c1c6782 JH	122	{
7c1c6782 JH	123	char buffer[1024];
d551a488	124	FILE *f = (filename == NULL ? NULL : fopen(filename, "r"));
7c1c6782 JH	125
	126	if (f == NULL)
	127	return 1;
	128	while (fgets(buffer, sizeof(buffer), f) != NULL) {
0925ce4d	129	char name1 = 0, email1 = 0, name2 = 0, email2 = 0;
7c1c6782 JH	130	if (buffer[0] == '#') {
	131	static const char abbrev[] = "# repo-abbrev:";
	132	int abblen = sizeof(abbrev) - 1;
	133	int len = strlen(buffer);
	134
8503ee43 AR	135	if (!repo_abbrev)
	136	continue;
	137
7c1c6782 JH	138	if (len && buffer[len - 1] == '\n')
	139	buffer[--len] = 0;
	140	if (!strncmp(buffer, abbrev, abblen)) {
	141	char *cp;
	142
	143	if (repo_abbrev)
	144	free(*repo_abbrev);
	145	*repo_abbrev = xmalloc(len);
	146
	147	for (cp = buffer + abblen; isspace(*cp); cp++)
	148	; /* nothing */
	149	strcpy(*repo_abbrev, cp);
	150	}
	151	continue;
	152	}
0925ce4d MSO	153	if ((name2 = parse_name_and_email(buffer, &name1, &email1)) != NULL)
	154	parse_name_and_email(name2, &name2, &email2);
	155
	156	if (email1)
	157	add_mapping(map, name1, email1, name2, email2);
7c1c6782 JH	158	}
	159	fclose(f);
	160	return 0;
	161	}
	162
d551a488 MSO	163	int read_mailmap(struct string_list map, char *repo_abbrev)
d551a488 MSO	164	{
0925ce4d	165	map->strdup_strings = 1;
d551a488 MSO	166	/* each failure returns 1, so >1 means both calls failed */
	167	return read_single_mailmap(map, ".mailmap", repo_abbrev) +
	168	read_single_mailmap(map, git_mailmap_file, repo_abbrev) > 1;
	169	}
	170
0925ce4d MSO	171	void clear_mailmap(struct string_list *map)
	172	{
	173	debug_mm("mailmap: clearing %d entries...\n", map->nr);
	174	map->strdup_strings = 1;
	175	string_list_clear_func(map, free_mailmap_entry);
	176	debug_mm("mailmap: cleared\n");
	177	}
	178
	179	int map_user(struct string_list *map,
	180	char email, int maxlen_email, char name, int maxlen_name)
7c1c6782 JH	181	{
7c1c6782 JH	182	char *p;
c455c87c	183	struct string_list_item *item;
0925ce4d	184	struct mailmap_entry *me;
7c1c6782 JH	185	char buf[1024], *mailbuf;
	186	int i;
	187
0925ce4d	188	/* figure out space requirement for email */
7c1c6782	189	p = strchr(email, '>');
0925ce4d MSO	190	if (!p) {
	191	/* email passed in might not be wrapped in <>, but end with a \0 */
	192	p = memchr(email, '\0', maxlen_email);
	193	if (p == 0)
	194	return 0;
	195	}
7c1c6782 JH	196	if (p - email + 1 < sizeof(buf))
	197	mailbuf = buf;
	198	else
	199	mailbuf = xmalloc(p - email + 1);
	200
	201	/* downcase the email address */
	202	for (i = 0; i < p - email; i++)
	203	mailbuf[i] = tolower(email[i]);
	204	mailbuf[i] = 0;
0925ce4d MSO	205
0925ce4d MSO	206	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
c455c87c	207	item = string_list_lookup(mailbuf, map);
0925ce4d MSO	208	if (item != NULL) {
	209	me = (struct mailmap_entry *)item->util;
	210	if (me->namemap.nr) {
	211	/* The item has multiple items, so we'll look up on name too */
	212	/* If the name is not found, we choose the simple entry */
	213	struct string_list_item *subitem = string_list_lookup(name, &me->namemap);
	214	if (subitem)
	215	item = subitem;
	216	}
	217	}
7c1c6782 JH	218	if (mailbuf != buf)
	219	free(mailbuf);
	220	if (item != NULL) {
0925ce4d MSO	221	struct mailmap_info mi = (struct mailmap_info )item->util;
	222	if (mi->name == NULL && (mi->email == NULL \|\| maxlen_email == 0)) {
	223	debug_mm("map_user: -- (no simple mapping)\n");
	224	return 0;
	225	}
	226	if (maxlen_email && mi->email)
	227	strlcpy(email, mi->email, maxlen_email);
	228	if (maxlen_name && mi->name)
	229	strlcpy(name, mi->name, maxlen_name);
	230	debug_mm("map_user: to '%s' <%s>\n", name, mi->email ? mi->email : "");
7c1c6782 JH	231	return 1;
7c1c6782 JH	232	}
0925ce4d	233	debug_mm("map_user: --\n");
7c1c6782 JH	234	return 0;
7c1c6782 JH	235	}
0925ce4d MSO	236
	237	int map_email(struct string_list map, const char email, char *name, int maxlen)
	238	{
	239	return map_user(map, (char *)email, 0, name, maxlen);
	240	}