[PATCH v5 4/5] Change current mailmap usage to do matching on both name and email of author/committer.

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Signed-off-by: Marius Storm-Olsen <marius@xxxxxxxxxxxxx>
---
 Documentation/pretty-formats.txt |    2 +
 builtin-blame.c                  |   50 +++++++++++-------
 builtin-shortlog.c               |   22 ++++++--
 pretty.c                         |   57 +++++++++++----------
 t/t4203-mailmap.sh               |  106 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 186 insertions(+), 51 deletions(-)

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 9cfa090..114a214 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -1264,11 +1264,12 @@ 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)
@@ -1279,10 +1280,11 @@ 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;
 	}
@@ -1305,9 +1307,10 @@ 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;
@@ -1316,20 +1319,23 @@ 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,
@@ -1338,8 +1344,10 @@ 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];
 
 	/*
@@ -1357,9 +1365,11 @@ 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) {
@@ -1367,9 +1377,11 @@ 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 314b6bc..badd912 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 cecd9fc..518b40a 100644
--- a/pretty.c
+++ b/pretty.c
@@ -306,23 +306,14 @@ 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, 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,
@@ -333,6 +324,9 @@ 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++)
@@ -346,25 +340,34 @@ 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 fc50ac2..9a7d1b4 100755
--- a/t/t4203-mailmap.sh
+++ b/t/t4203-mailmap.sh
@@ -106,4 +106,110 @@ 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@xxxxxxxxxxx> (1):
+      initial
+
+CTO <cto@xxxxxxxxxx> (1):
+      seventh
+
+Other Author <other@xxxxxxxxx> (2):
+      third
+      fourth
+
+Santa Claus <santa.claus@xxxxxxxxxxxx> (2):
+      fifth
+      sixth
+
+Some Dude <some@xxxxxxx> (1):
+      second
+
+EOF
+
+test_expect_success 'Shortlog output (complex mapping)' '
+	echo three >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "nick2 <bugs@xxxxxxxxxx>" -m third &&
+
+	echo four >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "nick2 <nick2@xxxxxxxxxx>" -m fourth &&
+
+	echo five >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "santa <me@xxxxxxxxxx>" -m fifth &&
+
+	echo six >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "claus <me@xxxxxxxxxx>" -m sixth &&
+
+	echo seven >>one &&
+	git add one &&
+	test_tick &&
+	git commit --author "CTO <cto@xxxxxxxxxxx>" -m seventh &&
+
+	mkdir internal_mailmap &&
+	echo "Committed <committer@xxxxxxxxxxx>" > internal_mailmap/.mailmap &&
+	echo "<cto@xxxxxxxxxx>                       <cto@xxxxxxxxxxx>" >> internal_mailmap/.mailmap &&
+	echo "Some Dude <some@xxxxxxx>         nick1 <bugs@xxxxxxxxxx>" >> internal_mailmap/.mailmap &&
+	echo "Other Author <other@xxxxxxxxx>   nick2 <bugs@xxxxxxxxxx>" >> internal_mailmap/.mailmap &&
+	echo "Other Author <other@xxxxxxxxx>         <nick2@xxxxxxxxxx>" >> internal_mailmap/.mailmap &&
+	echo "Santa Claus <santa.claus@xxxxxxxxxxxx> <me@xxxxxxxxxx>" >> internal_mailmap/.mailmap &&
+	echo "Santa Claus <santa.claus@xxxxxxxxxxxx> <me@xxxxxxxxxx>" >> internal_mailmap/.mailmap &&
+
+	git shortlog -e HEAD >actual &&
+	test_cmp expect actual
+
+'
+
+# git log with --pretty format which uses the name and email mailmap placemarkers
+cat >expect <<\EOF
+Author CTO <cto@xxxxxxxxxxx> maps to CTO <cto@xxxxxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+
+Author claus <me@xxxxxxxxxx> maps to Santa Claus <santa.claus@xxxxxxxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+
+Author santa <me@xxxxxxxxxx> maps to Santa Claus <santa.claus@xxxxxxxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+
+Author nick2 <nick2@xxxxxxxxxx> maps to Other Author <other@xxxxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+
+Author nick2 <bugs@xxxxxxxxxx> maps to Other Author <other@xxxxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+
+Author nick1 <bugs@xxxxxxxxxx> maps to Some Dude <some@xxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+
+Author A U Thor <author@xxxxxxxxxxx> maps to A U Thor <author@xxxxxxxxxxx>
+Committer C O Mitter <committer@xxxxxxxxxxx> maps to Committed <committer@xxxxxxxxxxx>
+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
+7de6f99b (Some Dude    2005-04-07 15:13:13 -0700 2) two
+5815879d (Other Author 2005-04-07 15:14:13 -0700 3) three
+ff859d96 (Other Author 2005-04-07 15:15:13 -0700 4) four
+5ab6d4fa (Santa Claus  2005-04-07 15:16:13 -0700 5) five
+38a42d8b (Santa Claus  2005-04-07 15:17:13 -0700 6) six
+8ddc0386 (CTO          2005-04-07 15:18:13 -0700 7) seven
+EOF
+
+test_expect_success 'Blame output (complex mapping)' '
+	git blame one >actual &&
+	test_cmp expect actual
+'
+
 test_done
-- 
1.6.1.2.354.g9a90

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