v2, 4 partsAdd find_insert_index, insert_at_index and clear_func functions to string_list

Documentation/config.txt, Documentation/git-shortlog.txt, builtin-blame.c, builtin-shortlog.c, cache.h, config.c, mailmap.c, t/t4203-mailmap.sh

diff --git a/Documentation/config.txt b/Documentation/config.txt
index e2b8775..02c7b4c 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1012,6 +1012,15 @@ log.showroot::
 	Tools like linkgit:git-log[1] or linkgit:git-whatchanged[1], which
 	normally hide the root commit will now show it. True by default.
 
+log.mailmap::
+	Overrides the default location of the mailmap file. The default
+	mailmap location is .mailmap in the root of the repository.
+	The new location of the mailmap file may be in a repository
+	subdirectory, or somewhere outside of the repository itself.
+	If git can't find the file, it will try to load the default
+	mailmap location instead.
+	See linkgit:git-shortlog[1] and linkgit:git-blame[1].
+
 man.viewer::
 	Specify the programs that may be used to display help in the
 	'man' format. See linkgit:git-help[1].
diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt
index 8f7c0e2..cacbeea 100644
--- a/Documentation/git-shortlog.txt
+++ b/Documentation/git-shortlog.txt
@@ -48,7 +48,8 @@ OPTIONS
 FILES
 -----
 
-If a file `.mailmap` exists at the toplevel of the repository,
+If a file `.mailmap` exists at the toplevel of the repository, or at the
+location pointed to by the log.mailmap configuration option,
 it is used to map an author email address to a canonical real name. This
 can be used to coalesce together commits by the same person where their
 name was spelled differently (whether with the same email address or
diff --git a/builtin-blame.c b/builtin-blame.c
index aae14ef..4b63775 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -2394,7 +2394,7 @@ parse_done:
 		die("reading graft file %s failed: %s",
 		    revs_file, strerror(errno));
 
-	read_mailmap(&mailmap, ".mailmap", NULL);
+	read_mailmap(&mailmap, NULL, NULL);
 
 	if (!incremental)
 		setup_pager();
diff --git a/builtin-shortlog.c b/builtin-shortlog.c
index 5f9f3f0..04832a8 100644
--- a/builtin-shortlog.c
+++ b/builtin-shortlog.c
@@ -219,7 +219,7 @@ void shortlog_init(struct shortlog *log)
 {
 	memset(log, 0, sizeof(*log));
 
-	read_mailmap(&log->mailmap, ".mailmap", &log->common_repo_prefix);
+	read_mailmap(&log->mailmap, NULL, &log->common_repo_prefix);
 
 	log->list.strdup_strings = 1;
 	log->wrap = DEFAULT_WRAPLEN;
@@ -248,6 +248,7 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 	struct parse_opt_ctx_t ctx;
 
 	prefix = setup_git_directory_gently(&nongit);
+	git_config(git_default_config, NULL);
 	shortlog_init(&log);
 	init_revisions(&rev, prefix);
 	parse_options_start(&ctx, argc, argv, PARSE_OPT_KEEP_DASHDASH |
diff --git a/cache.h b/cache.h
index 45e713e..3eef7ea 100644
--- a/cache.h
+++ b/cache.h
@@ -867,6 +867,7 @@ extern int user_ident_explicitly_given;
 
 extern const char *git_commit_encoding;
 extern const char *git_log_output_encoding;
+extern const char *git_log_mailmap;
 
 /* IO helper functions */
 extern void maybe_flush_or_die(FILE *, const char *);
diff --git a/config.c b/config.c
index 790405a..9ebcbbe 100644
--- a/config.c
+++ b/config.c
@@ -565,6 +565,13 @@ static int git_default_branch_config(const char *var, const char *value)
 	return 0;
 }
 
+static int git_default_log_config(const char *var, const char *value)
+{
+	if (!strcmp(var, "log.mailmap"))
+		return git_config_string(&git_log_mailmap, var, value);
+	return 0;
+}
+
 int git_default_config(const char *var, const char *value, void *dummy)
 {
 	if (!prefixcmp(var, "core."))
@@ -579,6 +586,9 @@ int git_default_config(const char *var, const char *value, void *dummy)
 	if (!prefixcmp(var, "branch."))
 		return git_default_branch_config(var, value);
 
+	if (!prefixcmp(var, "log."))
+		return git_default_log_config(var, value);
+
 	if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 		pager_use_color = git_config_bool(var,value);
 		return 0;
diff --git a/mailmap.c b/mailmap.c
index 88fc6f3..32eab6c 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -2,11 +2,18 @@
 #include "string-list.h"
 #include "mailmap.h"
 
+const char *git_log_mailmap;
 int read_mailmap(struct string_list *map, const char *filename, char **repo_abbrev)
 {
 	char buffer[1024];
-	FILE *f = fopen(filename, "r");
+	FILE *f = NULL;
 
+	if (filename)
+		f = fopen(filename, "r");
+	if (f == NULL && git_log_mailmap)
+		f = fopen(git_log_mailmap, "r");
+	if (f == NULL)
+		f = fopen(".mailmap", "r");
 	if (f == NULL)
 		return 1;
 	while (fgets(buffer, sizeof(buffer), f) != NULL) {
diff --git a/t/t4203-mailmap.sh b/t/t4203-mailmap.sh
new file mode 100755
index 0000000..57fd88e
--- /dev/null
+++ b/t/t4203-mailmap.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+test_description='.mailmap configurations'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	echo one >one &&
+	git add one &&
+	test_tick &&
+	git commit -m initial
+'
+
+test_expect_success 'No mailmap' '
+	git shortlog >actual &&
+	echo "A U Thor (1):" >expect; echo "      initial" >>expect; echo >>expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'default .mailmap' '
+	echo "Repo Guy <author@example.com>" > .mailmap &&
+	git shortlog >actual &&
+	echo "Repo Guy (1):" >expect; echo "      initial" >>expect; echo >>expect &&
+	test_cmp expect actual
+'
+
+# Using a mailmap file in a subdirectory of the repo here, but
+# could just as well have been a file outside of the repository
+test_expect_success 'log.mailmap set' '
+	mkdir internal_mailmap &&
+	echo "Internal Guy <author@example.com>" > internal_mailmap/.mailmap &&
+	git config log.mailmap internal_mailmap/.mailmap &&
+	git shortlog >actual &&
+	echo "Internal Guy (1):" >expect; echo "      initial" >>expect; echo >>expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'log.mailmap file non-existant' '
+	rm internal_mailmap/.mailmap &&
+	rmdir internal_mailmap &&
+	git shortlog >actual &&
+	echo "Repo Guy (1):" >expect; echo "      initial" >>expect; echo >>expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'No mailmap files, but configured' '
+	rm .mailmap &&
+	git shortlog >actual &&
+	echo "A U Thor (1):" >expect; echo "      initial" >>expect; echo >>expect &&
+	test_cmp expect actual
+'
+
+test_done

string-list.c, string-list.h

diff --git a/string-list.c b/string-list.c
index ddd83c8..15e14cf 100644
--- a/string-list.c
+++ b/string-list.c
@@ -26,10 +26,10 @@ static int get_entry_index(const struct string_list *list, const char *string,
 }
 
 /* returns -1-index if already exists */
-static int add_entry(struct string_list *list, const char *string)
+static int add_entry(int insert_at, struct string_list *list, const char *string)
 {
-	int exact_match;
-	int index = get_entry_index(list, string, &exact_match);
+	int exact_match = 0;
+	int index = insert_at != -1 ? insert_at : get_entry_index(list, string, &exact_match);
 
 	if (exact_match)
 		return -1 - index;
@@ -53,7 +53,13 @@ static int add_entry(struct string_list *list, const char *string)
 
 struct string_list_item *string_list_insert(const char *string, struct string_list *list)
 {
-	int index = add_entry(list, string);
+	return string_list_insert_at_index(-1, string, list);
+}
+
+struct string_list_item *string_list_insert_at_index(int insert_at,
+						     const char *string, struct string_list *list)
+{
+	int index = add_entry(insert_at, list, string);
 
 	if (index < 0)
 		index = -1 - index;
@@ -68,6 +74,16 @@ int string_list_has_string(const struct string_list *list, const char *string)
 	return exact_match;
 }
 
+int string_list_find_insert_index(const struct string_list *list, const char *string,
+				  int negative_existing_index)
+{
+	int exact_match;
+	int index = get_entry_index(list, string, &exact_match);
+	if (exact_match)
+		index = -1 - (negative_existing_index ? index : 0);
+	return index;
+}
+
 struct string_list_item *string_list_lookup(const char *string, struct string_list *list)
 {
 	int exact_match, i = get_entry_index(list, string, &exact_match);
@@ -94,6 +110,25 @@ void string_list_clear(struct string_list *list, int free_util)
 	list->nr = list->alloc = 0;
 }
 
+void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc)
+{
+	if (list->items) {
+		int i;
+		if (clearfunc) {
+			for (i = 0; i < list->nr; i++)
+				clearfunc(list->items[i].util, list->items[i].string);
+		}
+		if (list->strdup_strings) {
+			for (i = 0; i < list->nr; i++)
+				free(list->items[i].string);
+		}
+		free(list->items);
+	}
+	list->items = NULL;
+	list->nr = list->alloc = 0;
+}
+
+
 void print_string_list(const char *text, const struct string_list *p)
 {
 	int i;
diff --git a/string-list.h b/string-list.h
index 4d6a705..d32ba05 100644
--- a/string-list.h
+++ b/string-list.h
@@ -15,9 +15,18 @@ struct string_list
 void print_string_list(const char *text, const struct string_list *p);
 void string_list_clear(struct string_list *list, int free_util);
 
+/* Use this function to call a custom clear function on each util pointer */
+/* The string associated with the util pointer is passed as the second argument */
+typedef void (*string_list_clear_func_t)(void *p, const char *str);
+void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc);
+
 /* Use these functions only on sorted lists: */
 int string_list_has_string(const struct string_list *list, const char *string);
+int string_list_find_insert_index(const struct string_list *list, const char *string,
+				  int negative_existing_index);
 struct string_list_item *string_list_insert(const char *string, struct string_list *list);
+struct string_list_item *string_list_insert_at_index(int insert_at,
+						     const char *string, struct string_list *list);
 struct string_list_item *string_list_lookup(const char *string, struct string_list *list);
 
 /* Use these functions only on unsorted lists: */

Documentation/git-shortlog.txt, mailmap.c, mailmap.h

diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt
index cacbeea..d64dabf 100644
--- a/Documentation/git-shortlog.txt
+++ b/Documentation/git-shortlog.txt
@@ -50,20 +50,29 @@ FILES
 
 If a file `.mailmap` exists at the toplevel of the repository, or at the
 location pointed to by the log.mailmap configuration option,
-it is used to map an author email address to a canonical real name. This
-can be used to coalesce together commits by the same person where their
-name was spelled differently (whether with the same email address or
-not).
-
-Each line in the file consists, in this order, of the canonical real name
-of an author, whitespace, and an email address (enclosed by '<' and '>')
-to map to the name. Use hash '#' for comments, either on their own line,
-or after the email address.
-
-A canonical name may appear in more than one line, associated with
-different email addresses, but it doesn't make sense for a given address
-to appear more than once (if that happens, a later line overrides the
-earlier ones).
+it is used to map author and committer names and email addresses to
+canonical real names and email addresses.
+This can be used to coalesce together commits by the same person where
+their name and/or email address was spelled differently.
+
+In the simple form, each line in the file consists of the canonical real name
+of an author, whitespace, and an email address used in the commit
+(enclosed by '<' and '>') to map to the name. Thus, looks like this
+--
+	Proper Name <commit@email.xx>
+--
+
+The more complex forms are
+--
+	Proper Name <proper@email.xx> <commit@email.xx>
+--
+which allows mailmap to replace both the name and the email of a commit
+matching the specified commit email address. And
+--
+	Proper Name <proper@email.xx> Commit Name <commit@email.xx>
+--
+which allows mailmap to replace both the name and the email of a commit
+matching the specified commit name and email address.
 
 So, for example, if your history contains commits by two authors, Jane
 and Joe, whose names appear in the repository under several forms:
@@ -86,6 +95,27 @@ Jane Doe <jane@desktop.(none)>
 Joe R. Developer <joe@random.com>
 ------------
 
+Now, suppose your repository contains commits from the following authors:
+
+------------
+nick1 <bugs@company.xx>
+nick2 <bugs@company.xx>
+nick2 <nick2@company.xx>
+santa <me@company.xx>
+claus <me@company.xx>
+------------
+
+Then, you might want a `.mailmap` file looking like:
+------------
+Some Dude <some@dude.xx>         nick1 <bugs@company.xx>
+Other Author <other@author.xx>   nick2 <bugs@company.xx>
+Other Author <other@author.xx>         <nick2@company.xx>
+Santa Claus <santa.claus@northpole.xx> <me@company.xx>
+------------
+
+Use hash '#' for comments, either on their own line, or after the email address.
+
+
 Author
 ------
 Written by Jeff Garzik <jgarzik@pobox.com>
diff --git a/mailmap.c b/mailmap.c
index 32eab6c..937aa07 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -2,7 +2,87 @@
 #include "string-list.h"
 #include "mailmap.h"
 
+#define DEBUG_MAILMAP 0
+#if DEBUG_MAILMAP
+#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
+#else
+inline void debug_mm(const char *format, ...) {}
+#endif
+
 const char *git_log_mailmap;
+
+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;
+};
+
+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);
+}
+
+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);
+}
+
+void add_mapping(struct string_list *map,
+		 char *name1, char *email1, char *name2, char *email2)
+{
+	struct mailmap_entry *me;
+	int index = string_list_find_insert_index(map, email1, 1);
+	if (index < 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, email1, map);
+		item->util = xmalloc(sizeof(struct mailmap_entry));
+		memset(item->util, 0, sizeof(struct mailmap_entry));
+	}
+	me = (struct mailmap_entry *)map->items[index].util;
+
+	if (name2 == NULL) {
+		debug_mm("mailmap: adding (simple) entry for %s at index %d\n", email1, index);
+		/* Replace current name and new email for simple entry */
+		free(me->name);
+		free(me->email);
+		me->name = xstrdup(name1);
+		if (email2)
+			me->email = xstrdup(email2);
+	} else {
+		struct mailmap_info *mi = xmalloc(sizeof(struct mailmap_info));
+		debug_mm("mailmap: adding (complex) entry for %s at index %d\n", email1, index);
+		mi->name = xstrdup(name2);
+		if (email2)
+			mi->email = xstrdup(email2);
+		string_list_insert(name1, &me->namemap)->util = mi;
+	}
+
+	debug_mm("mailmap:  '%s' <%s> -> '%s' <%s>\n",
+		 name2 ? name1 : "", email1,
+		 name2 ? name2 : name1, email2 ? email2 : "");
+}
+
 int read_mailmap(struct string_list *map, const char *filename, char **repo_abbrev)
 {
 	char buffer[1024];
@@ -17,8 +97,8 @@ int read_mailmap(struct string_list *map, const char *filename, char **repo_abbr
 	if (f == NULL)
 		return 1;
 	while (fgets(buffer, sizeof(buffer), f) != NULL) {
-		char *end_of_name, *left_bracket, *right_bracket;
-		char *name, *email;
+		char *end_of_name, *left_bracket1, *right_bracket1, *left_bracket2, *right_bracket2;
+		char *name1, *email1, *name2, *email2;
 		int i;
 		if (buffer[0] == '#') {
 			static const char abbrev[] = "# repo-abbrev:";
@@ -43,41 +123,95 @@ int read_mailmap(struct string_list *map, const char *filename, char **repo_abbr
 			}
 			continue;
 		}
-		if ((left_bracket = strchr(buffer, '<')) == NULL)
+		/* Locate name and email */
+		if ((left_bracket1 = strchr(buffer, '<')) == NULL)
 			continue;
-		if ((right_bracket = strchr(left_bracket + 1, '>')) == NULL)
+		if ((right_bracket1 = strchr(left_bracket1 + 1, '>')) == NULL)
 			continue;
-		if (right_bracket == left_bracket + 1)
+		if (right_bracket1 == left_bracket1 + 1)
 			continue;
-		for (end_of_name = left_bracket;
+		for (end_of_name = left_bracket1;
 		     end_of_name != buffer && isspace(end_of_name[-1]);
 		     end_of_name--)
 			; /* keep on looking */
 		if (end_of_name == buffer)
 			continue;
-		name = xmalloc(end_of_name - buffer + 1);
-		strlcpy(name, buffer, end_of_name - buffer + 1);
-		email = xmalloc(right_bracket - left_bracket);
-		for (i = 0; i < right_bracket - left_bracket - 1; i++)
-			email[i] = tolower(left_bracket[i + 1]);
-		email[right_bracket - left_bracket - 1] = '\0';
-		string_list_insert(email, map)->util = name;
+		name1 = xmalloc(end_of_name - buffer + 1);
+		strlcpy(name1, buffer, end_of_name - buffer + 1);
+		email1 = xmalloc(right_bracket1 - left_bracket1);
+		for (i = 0; i < right_bracket1 - left_bracket1 - 1; i++)
+			email1[i] = tolower(left_bracket1[i + 1]);
+		email1[right_bracket1 - left_bracket1 - 1] = '\0';
+
+		/* Locate 2nd name and email. Possible mappings in mailmap file are:
+		 *   proper_name <commit_email>
+		 *   proper_name <proper_email> <commit_email>
+		 *   proper_name <proper_email> commit_name <commit_email>
+		 */
+		do {
+			email2 = name2 = 0;
+			right_bracket1 += 1;
+			if ((left_bracket2 = strchr(right_bracket1, '<')) == NULL)
+				continue;
+			if ((right_bracket2 = strchr(left_bracket2 + 1, '>')) == NULL)
+				continue;
+			if (right_bracket2 == left_bracket2 + 1)
+				continue;
+			for (end_of_name = left_bracket2;
+			     end_of_name != right_bracket1 && isspace(end_of_name[-1]);
+			     end_of_name--)
+				; /* keep on looking for name end */
+			for (;
+			     end_of_name != right_bracket1 && isspace(right_bracket1[0]);
+			     right_bracket1++)
+				; /* keep on looking for name start */
+			if (end_of_name != right_bracket1) {
+				name2 = xmalloc(end_of_name - right_bracket1 + 1);
+				strlcpy(name2, right_bracket1, end_of_name - right_bracket1 + 1);
+				char *tmp = name1;
+				name1 = name2;
+				name2 = tmp;
+			}
+			email2 = xmalloc(right_bracket2 - left_bracket2);
+			for (i = 0; i < right_bracket2 - left_bracket2 - 1; i++)
+				email2[i] = tolower(left_bracket2[i + 1]);
+			email2[right_bracket2 - left_bracket2 - 1] = '\0';
+			char *tmp = email1;
+			email1 = email2;
+			email2 = tmp;
+		} while(0);
+
+		add_mapping(map, name1, email1, name2, email2);
 	}
 	fclose(f);
 	return 0;
 }
 
-int map_email(struct string_list *map, const char *email, char *name, int maxlen)
+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;
 
-	/* autocomplete common developers */
+	/* figure out space requirement for email */
 	p = strchr(email, '>');
-	if (!p)
-		return 0;
+	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
@@ -87,13 +221,39 @@ int map_email(struct string_list *map, const char *email, char *name, int maxlen
 	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) {
-		const char *realname = (const char *)item->util;
-		strlcpy(name, realname, maxlen);
+		struct mailmap_info *mi = (struct mailmap_info *)item->util;
+		if (mi->email == NULL && mi->name == NULL) {
+			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 ? email : mailbuf);
 		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);
+}
diff --git a/mailmap.h b/mailmap.h
index 6e48f83..1b5ae69 100644
--- a/mailmap.h
+++ b/mailmap.h
@@ -2,6 +2,10 @@
 #define MAILMAP_H
 
 int read_mailmap(struct string_list *map, const char *filename, char **repo_abbrev);
+void clear_mailmap(struct string_list *map);
+
 int map_email(struct string_list *mailmap, const char *email, char *name, int maxlen);
+int map_user(struct string_list *mailmap,
+	     char *email, int maxlen_email, char *name, int maxlen_name);
 
 #endif

Documentation/pretty-formats.txt, builtin-blame.c, builtin-shortlog.c, pretty.c, t/t4203-mailmap.sh

diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index 3d87d3e..28808b7 100644
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -103,6 +103,7 @@ The placeholders are:
 - '%an': author name
 - '%aN': author name (respecting .mailmap)
 - '%ae': author email
+- '%aE': author email (respecting .mailmap)
 - '%ad': author date (format respects --date= option)
 - '%aD': author date, RFC2822 style
 - '%ar': author date, relative
@@ -111,6 +112,7 @@ The placeholders are:
 - '%cn': committer name
 - '%cN': committer name (respecting .mailmap)
 - '%ce': committer email
+- '%cE': committer email (respecting .mailmap)
 - '%cd': committer date
 - '%cD': committer date, RFC2822 style
 - '%cr': committer date, relative
diff --git a/builtin-blame.c b/builtin-blame.c
index 4b63775..c166ba1 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -1263,11 +1263,12 @@ struct commit_info
  * Parse author/committer line in the commit object buffer
  */
 static void get_ac_line(const char *inbuf, const char *what,
-			int bufsz, char *person, const char **mail,
+			int person_len, char *person,
+			int mail_len, char *mail,
 			unsigned long *time, const char **tz)
 {
 	int len, tzlen, maillen;
-	char *tmp, *endp, *timepos;
+	char *tmp, *endp, *timepos, *mailpos;
 
 	tmp = strstr(inbuf, what);
 	if (!tmp)
@@ -1278,10 +1279,11 @@ static void get_ac_line(const char *inbuf, const char *what,
 		len = strlen(tmp);
 	else
 		len = endp - tmp;
-	if (bufsz <= len) {
+	if (person_len <= len) {
 	error_out:
 		/* Ugh */
-		*mail = *tz = "(unknown)";
+		*tz = "(unknown)";
+		strcpy(mail, *tz);
 		*time = 0;
 		return;
 	}
@@ -1304,9 +1306,10 @@ static void get_ac_line(const char *inbuf, const char *what,
 	*tmp = 0;
 	while (*tmp != ' ')
 		tmp--;
-	*mail = tmp + 1;
+	mailpos = tmp + 1;
 	*tmp = 0;
 	maillen = timepos - tmp;
+	memcpy(mail, mailpos, maillen);
 
 	if (!mailmap.nr)
 		return;
@@ -1315,20 +1318,23 @@ static void get_ac_line(const char *inbuf, const char *what,
 	 * mailmap expansion may make the name longer.
 	 * make room by pushing stuff down.
 	 */
-	tmp = person + bufsz - (tzlen + 1);
+	tmp = person + person_len - (tzlen + 1);
 	memmove(tmp, *tz, tzlen);
 	tmp[tzlen] = 0;
 	*tz = tmp;
 
-	tmp = tmp - (maillen + 1);
-	memmove(tmp, *mail, maillen);
-	tmp[maillen] = 0;
-	*mail = tmp;
-
 	/*
-	 * Now, convert e-mail using mailmap
+	 * Now, convert both name and e-mail using mailmap
 	 */
-	map_email(&mailmap, tmp + 1, person, tmp-person-1);
+	if(map_user(&mailmap, mail+1, mail_len-1, person, tmp-person-1)) {
+		/* Add a trailing '>' to email, since map_user returns plain emails
+		   Note: It already has '<', since we replace from mail+1 */
+		mailpos = memchr(mail, '\0', mail_len);
+		if (mailpos && mailpos-mail < mail_len - 1) {
+			*mailpos = '>';
+			*(mailpos+1) = '\0';
+		}
+	}
 }
 
 static void get_commit_info(struct commit *commit,
@@ -1337,8 +1343,10 @@ static void get_commit_info(struct commit *commit,
 {
 	int len;
 	char *tmp, *endp, *reencoded, *message;
-	static char author_buf[1024];
-	static char committer_buf[1024];
+	static char author_name[1024];
+	static char author_mail[1024];
+	static char committer_name[1024];
+	static char committer_mail[1024];
 	static char summary_buf[1024];
 
 	/*
@@ -1356,9 +1364,11 @@ static void get_commit_info(struct commit *commit,
 	}
 	reencoded = reencode_commit_message(commit, NULL);
 	message   = reencoded ? reencoded : commit->buffer;
-	ret->author = author_buf;
+	ret->author = author_name;
+	ret->author_mail = author_mail;
 	get_ac_line(message, "\nauthor ",
-		    sizeof(author_buf), author_buf, &ret->author_mail,
+		    sizeof(author_name), author_name,
+		    sizeof(author_mail), author_mail,
 		    &ret->author_time, &ret->author_tz);
 
 	if (!detailed) {
@@ -1366,9 +1376,11 @@ static void get_commit_info(struct commit *commit,
 		return;
 	}
 
-	ret->committer = committer_buf;
+	ret->committer = committer_name;
+	ret->committer_mail = committer_mail;
 	get_ac_line(message, "\ncommitter ",
-		    sizeof(committer_buf), committer_buf, &ret->committer_mail,
+		    sizeof(committer_name), committer_name,
+		    sizeof(committer_mail), committer_mail,
 		    &ret->committer_time, &ret->committer_tz);
 
 	ret->summary = summary_buf;
diff --git a/builtin-shortlog.c b/builtin-shortlog.c
index 04832a8..19975ce 100644
--- a/builtin-shortlog.c
+++ b/builtin-shortlog.c
@@ -40,6 +40,7 @@ static void insert_one_record(struct shortlog *log,
 	char *buffer, *p;
 	struct string_list_item *item;
 	char namebuf[1024];
+	char emailbuf[1024];
 	size_t len;
 	const char *eol;
 	const char *boemail, *eoemail;
@@ -51,7 +52,19 @@ static void insert_one_record(struct shortlog *log,
 	eoemail = strchr(boemail, '>');
 	if (!eoemail)
 		return;
-	if (!map_email(&log->mailmap, boemail+1, namebuf, sizeof(namebuf))) {
+
+	/* copy author name to namebuf, to support matching on both name and email */
+	memcpy(namebuf, author, boemail - author);
+	len = boemail - author;
+	while(len > 0 && isspace(namebuf[len-1]))
+		len--;
+	namebuf[len] = 0;
+
+	/* copy email name to emailbuf, to allow email replacement as well */
+	memcpy(emailbuf, boemail+1, eoemail - boemail);
+	emailbuf[eoemail - boemail - 1] = 0;
+
+	if (!map_user(&log->mailmap, emailbuf, sizeof(emailbuf), namebuf, sizeof(namebuf))) {
 		while (author < boemail && isspace(*author))
 			author++;
 		for (len = 0;
@@ -67,8 +80,8 @@ static void insert_one_record(struct shortlog *log,
 
 	if (log->email) {
 		size_t room = sizeof(namebuf) - len - 1;
-		int maillen = eoemail - boemail + 1;
-		snprintf(namebuf + len, room, " %.*s", maillen, boemail);
+		int maillen = strlen(emailbuf);
+		snprintf(namebuf + len, room, " <%.*s>", maillen, emailbuf);
 	}
 
 	item = string_list_insert(namebuf, &log->list);
@@ -321,6 +334,5 @@ void shortlog_output(struct shortlog *log)
 
 	log->list.strdup_strings = 1;
 	string_list_clear(&log->list, 1);
-	log->mailmap.strdup_strings = 1;
-	string_list_clear(&log->mailmap, 1);
+	clear_mailmap(&log->mailmap);
 }
diff --git a/pretty.c b/pretty.c
index cc460b5..e93e472 100644
--- a/pretty.c
+++ b/pretty.c
@@ -305,23 +305,14 @@ static char *logmsg_reencode(const struct commit *commit,
 	return out;
 }
 
-static int mailmap_name(struct strbuf *sb, const char *email)
+static int mailmap_name(char *email, int email_len, char *name, int name_len)
 {
 	static struct string_list *mail_map;
-	char buffer[1024];
-
 	if (!mail_map) {
 		mail_map = xcalloc(1, sizeof(*mail_map));
-		read_mailmap(mail_map, ".mailmap", NULL);
+		read_mailmap(mail_map, NULL, NULL);
 	}
-
-	if (!mail_map->nr)
-		return -1;
-
-	if (!map_email(mail_map, email, buffer, sizeof(buffer)))
-		return -1;
-	strbuf_addstr(sb, buffer);
-	return 0;
+	return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
 }
 
 static size_t format_person_part(struct strbuf *sb, char part,
@@ -332,6 +323,9 @@ static size_t format_person_part(struct strbuf *sb, char part,
 	int start, end, tz = 0;
 	unsigned long date = 0;
 	char *ep;
+	const char *name_start, *name_end, *mail_start, *mail_end, *msg_end = msg+len;
+	char person_name[1024];
+	char person_mail[1024];
 
 	/* advance 'end' to point to email start delimiter */
 	for (end = 0; end < len && msg[end] != '<'; end++)
@@ -345,25 +339,34 @@ static size_t format_person_part(struct strbuf *sb, char part,
 	if (end >= len - 2)
 		goto skip;
 
+	/* Seek for both name and email part */
+	name_start = msg;
+	name_end = msg+end;
+	while (name_end > name_start && isspace(*(name_end-1)))
+		name_end--;
+	mail_start = msg+end+1;
+	mail_end = mail_start;
+	while (mail_end < msg_end && *mail_end != '>')
+		mail_end++;
+	if (mail_end == msg_end)
+		goto skip;
+	end = mail_end-msg;
+
+	if (part == 'N' || part == 'E') { /* mailmap lookup */
+		strlcpy(person_name, name_start, name_end-name_start+1);
+		strlcpy(person_mail, mail_start, mail_end-mail_start+1);
+		mailmap_name(person_mail, sizeof(person_mail), person_name, sizeof(person_name));
+		name_start = person_name;
+		name_end = name_start + strlen(person_name);
+		mail_start = person_mail;
+		mail_end = mail_start +  strlen(person_mail);
+	}
 	if (part == 'n' || part == 'N') {	/* name */
-		while (end > 0 && isspace(msg[end - 1]))
-			end--;
-		if (part != 'N' || !msg[end] || !msg[end + 1] ||
-		    mailmap_name(sb, msg + end + 2) < 0)
-			strbuf_add(sb, msg, end);
+		strbuf_add(sb, name_start, name_end-name_start);
 		return placeholder_len;
 	}
-	start = ++end; /* save email start position */
-
-	/* advance 'end' to point to email end delimiter */
-	for ( ; end < len && msg[end] != '>'; end++)
-		; /* do nothing */
-
-	if (end >= len)
-		goto skip;
-
-	if (part == 'e') {	/* email */
-		strbuf_add(sb, msg + start, end - start);
+	if (part == 'e' || part == 'E') {	/* email */
+		strbuf_add(sb, mail_start, mail_end-mail_start);
 		return placeholder_len;
 	}
 
diff --git a/t/t4203-mailmap.sh b/t/t4203-mailmap.sh
index 57fd88e..271ef26 100755
--- a/t/t4203-mailmap.sh
+++ b/t/t4203-mailmap.sh
@@ -50,4 +50,103 @@ test_expect_success 'No mailmap files, but configured' '
 	test_cmp expect actual
 '
 
+# Extended mailmap configurations should give us the following output for shortlog
+cat >expect <<\EOF
+A U Thor <author@example.com> (1):
+      initial
+
+Other Author <other@author.xx> (2):
+      third
+      fourth
+
+Santa Claus <santa.claus@northpole.xx> (2):
+      fifth
+      sixth
+
+Some Dude <some@dude.xx> (1):
+      second
+
+EOF
+
+test_expect_success 'Shortlog output (complex mapping)' '
+
+	echo two >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "nick1 <bugs@company.xx>" -m second &&
+
+	echo three >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "nick2 <bugs@company.xx>" -m third &&
+
+	echo four >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "nick2 <nick2@company.xx>" -m fourth &&
+
+	echo five >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "santa <me@company.xx>" -m fifth &&
+
+	echo six >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "claus <me@company.xx>" -m sixth &&
+
+	mkdir internal_mailmap &&
+	echo "Committed <committer@example.com>" > internal_mailmap/.mailmap &&
+	echo "Some Dude <some@dude.xx>         nick1 <bugs@company.xx>" >> internal_mailmap/.mailmap &&
+	echo "Other Author <other@author.xx>   nick2 <bugs@company.xx>" >> internal_mailmap/.mailmap &&
+	echo "Other Author <other@author.xx>         <nick2@company.xx>" >> internal_mailmap/.mailmap &&
+	echo "Santa Claus <santa.claus@northpole.xx> <me@company.xx>" >> internal_mailmap/.mailmap &&
+	echo "Santa Claus <santa.claus@northpole.xx> <me@company.xx>" >> internal_mailmap/.mailmap &&
+
+	git shortlog -e >actual &&
+	test_cmp expect actual
+
+'
+
+# git log with --pretty format which uses the name and email mailmap placemarkers
+cat >expect <<\EOF
+Author claus <me@company.xx> maps to Santa Claus <santa.claus@northpole.xx>
+Committer C O Mitter <committer@example.com> maps to Committed <committer@example.com>
+
+Author santa <me@company.xx> maps to Santa Claus <santa.claus@northpole.xx>
+Committer C O Mitter <committer@example.com> maps to Committed <committer@example.com>
+
+Author nick2 <nick2@company.xx> maps to Other Author <other@author.xx>
+Committer C O Mitter <committer@example.com> maps to Committed <committer@example.com>
+
+Author nick2 <bugs@company.xx> maps to Other Author <other@author.xx>
+Committer C O Mitter <committer@example.com> maps to Committed <committer@example.com>
+
+Author nick1 <bugs@company.xx> maps to Some Dude <some@dude.xx>
+Committer C O Mitter <committer@example.com> maps to Committed <committer@example.com>
+
+Author A U Thor <author@example.com> maps to A U Thor <author@example.com>
+Committer C O Mitter <committer@example.com> maps to Committed <committer@example.com>
+EOF
+
+test_expect_success 'Log output (complex mapping)' '
+	git log --pretty=format:"Author %an <%ae> maps to %aN <%aE>%nCommitter %cn <%ce> maps to %cN <%cE>%n" >actual &&
+	test_cmp expect actual
+'
+
+# git blame
+cat >expect <<\EOF
+^3a2fdcb (A U Thor     2005-04-07 15:13:13 -0700 1) one
+e0f60492 (Some Dude    2005-04-07 15:14:13 -0700 2) two
+4db1a3df (Other Author 2005-04-07 15:15:13 -0700 3) three
+e3718380 (Other Author 2005-04-07 15:16:13 -0700 4) four
+25e4bf3d (Santa Claus  2005-04-07 15:17:13 -0700 5) five
+17c39712 (Santa Claus  2005-04-07 15:18:13 -0700 6) six
+EOF
+
+test_expect_success 'Blame output (complex mapping)' '
+	git blame one >actual &&
+	test_cmp expect actual
+'
+
 test_done