STYLE message about full stop at the end of .Nd; inspired by mdoclint(1)

4 files changed, 18 insertions, 5 deletions

diff --git a/mandoc.1 b/mandoc.1
index 6ec18a96..b0865f93 100644
--- a/mandoc.1
+++ b/mandoc.1
@@ -1,4 +1,4 @@
-.\"	$Id: mandoc.1,v 1.191 2017/05/31 15:31:00 schwarze Exp $
+.\"	$Id: mandoc.1,v 1.192 2017/06/01 15:25:39 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2012, 2014-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: May 31 2017 $
+.Dd $Mdocdate: June 1 2017 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -763,6 +763,11 @@ macro that could be represented using
 .Ic \&Fx ,
 or
 .Ic \&Dx .
+.It Sy "description line ends with a full stop"
+.Pq mdoc
+Do not use punctuation at the end of an
+.Ic \&Nd
+block.
 .El
 .Ss Warnings related to the document prologue
 .Bl -ohang
diff --git a/mandoc.h b/mandoc.h
index 7038d691..f18d2d12 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -1,4 +1,4 @@
-/*	$Id: mandoc.h,v 1.218 2017/05/31 15:31:00 schwarze Exp $ */
+/*	$Id: mandoc.h,v 1.219 2017/06/01 15:25:39 schwarze Exp $ */
 /*
  * Copyright (c) 2010, 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -48,6 +48,7 @@ enum	mandocerr {
 
 	MANDOCERR_MACRO_USELESS, /* useless macro: macro */
 	MANDOCERR_BX, /* consider using OS macro: macro */
+	MANDOCERR_ND_DOT, /* description line ends with a full stop */
 
 	MANDOCERR_WARNING, /* ===== start of warnings ===== */
 
diff --git a/mdoc_validate.c b/mdoc_validate.c
index d50e95e2..69e6f603 100644
--- a/mdoc_validate.c
+++ b/mdoc_validate.c
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_validate.c,v 1.329 2017/05/31 15:31:00 schwarze Exp $ */
+/*	$Id: mdoc_validate.c,v 1.330 2017/06/01 15:25:39 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -1076,6 +1076,7 @@ static void
 post_nd(POST_ARGS)
 {
 	struct roff_node	*n;
+	size_t			 sz;
 
 	n = mdoc->last;
 
@@ -1089,6 +1090,11 @@ post_nd(POST_ARGS)
 	if (n->child == NULL)
 		mandoc_msg(MANDOCERR_ND_EMPTY, mdoc->parse,
 		    n->line, n->pos, "Nd");
+	else if (n->last->type == ROFFT_TEXT &&
+	    (sz = strlen(n->last->string)) != 0 &&
+	    n->last->string[sz - 1] == '.')
+		mandoc_msg(MANDOCERR_ND_DOT, mdoc->parse,
+		    n->last->line, n->last->pos + sz - 1, NULL);
 
 	post_hyph(mdoc);
 }
diff --git a/read.c b/read.c
index 6bc08463..c9559abc 100644
--- a/read.c
+++ b/read.c
@@ -1,4 +1,4 @@
-/*	$Id: read.c,v 1.167 2017/05/31 15:31:00 schwarze Exp $ */
+/*	$Id: read.c,v 1.168 2017/06/01 15:25:39 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -90,6 +90,7 @@ static	const char * const	mandocerrs[MANDOCERR_MAX] = {
 
 	"useless macro",
 	"consider using OS macro",
+	"description line ends with a full stop",
 
 	"generic warning",