pacman: update pkgver

pacman/PKGBUILD

@@ -4,7 +4,7 @@
 # Maintainer: Dave Reisner <dreisner@archlinux.org>
 
 pkgname=pacman
-pkgver=6.0.0alpha1
+pkgver=6.0.0alpha1.r118.ge176b8ec
 pkgrel=1
 pkgdesc="A library-based package manager with dependency support"
 arch=('x86_64')
@@ -34,6 +34,12 @@ prepare() {
   cd pacman
 }
 
+pkgver() {
+  cd pacman
+
+  git describe --long --tags | sed 's/^v//;s/\([^-]*-g\)/r\1/;s/-/./g'
+}
+
 build() {
 
   mkdir -p pacman/build