change vman helper to automatically detect section

Given a filename like "foo.1" or "foo.fr.1", it is possible to calculate
the correct directory to install to, without requiring the user to
specify it.

Suggested-by: Christian Neukirchen <chneukirchen@gmail.com>

Manual.md

@@ -172,11 +172,14 @@ The optional 4th argument can be used to change the `file name`.
 	permissions 0755. The optional 2nd argument can be used to change
 	the `file name`.
 
-- *vman()* `vman <file> <section> [<name>]`
+- *vman()* `vman <file> [<name>]`
 
-	Installs `file` into usr/share/man/<section> in the pkg
-	`$DESTDIR`. The optional 3rd argument can be used to change the
-	`file name`.
+	Installs `file` as a man page. `vman()` parses the name and
+	determines the section as well as localization. Example mappings:
+
+	`foo.1` -> `${DESTDIR}/usr/share/man/man1/foo.1`
+	`foo.fr.1` -> `${DESTDIR}/usr/share/man/fr/man1/foo.1`
+	`foo.1p` -> `${DESTDIR}/usr/share/man/man1/foo.1p`
 
 - *vdoc()* `vdoc <file> [<name>]`
 

common/helpers/install.sh

@@ -29,15 +29,31 @@ _vbin() {
 }
 
 _vman() {
-	local file="$1" section="$2" targetfile="$3"
+	local file="$1" target="${2:-$1}"
 
-	if [ $# -lt 2 ]; then
-		msg_red "$pkgver: vman: 2 arguments expected: <file> <section>\n"
+	if [ $# -lt 1 ]; then
+		msg_red "$pkgver: vman: 1 argument expected: <file>\n"
 		return 1
 	fi
 
-	vmkdir "usr/share/man/${section}"
-	vinstall "$file" 644 "usr/share/man/${section}" "$3"
+	suffix=${target##*.}
+
+	if  [[ $target =~ (.*)\.([a-z][a-z](_[A-Z][A-Z])?)\.(.*) ]]
+	then
+		name=${BASH_REMATCH[1]##*/}.${BASH_REMATCH[4]}
+		mandir=${BASH_REMATCH[2]}/man${suffix:0:1}
+	else
+		name=${name##*/}
+		mandir=man${suffix:0:1}
+	fi
+
+	if [[ ${mandir} == *man[0-9n] ]] ; then
+		vinstall "$file" 644 "usr/share/man/${mandir}" "$name"
+		return 0
+	fi
+
+	msg_red "$pkgver: vman: Filename '${target}' does not look like a man page\n"
+	return 1
 }
 
 _vdoc() {