Add license to PKGBUILD and auto-increment version

docs/distribution/archlinux/PKGBUILD

@@ -2,19 +2,24 @@
 # Just build via makepkg
 
 pkgname=rmps
-pkgver=20180216.0
+pkgver=20180704.81f454a
 pkgrel=1
 pkgdesc='Remote Management and Provisioning System'
 url='https://git.smirky.net/smirky/rmps.git/'
 arch=('i686' 'x86_64')
 depends=('libmariadbclient')
 validpgpkeys=('8C4D267F4977BFFEF23121E8646F3ABF6E457336')
-source=("$pkgname::git+https://git.smirky.net/smirky/$pkgname.git")
+source=("${pkgname}::git+https://git.smirky.net/smirky/${pkgname}.git")
 sha256sums=('SKIP')
+license=('GPL2')
 backup=(
 	etc/rmps/rmps.conf
 )
 
+pkgver() {
+	cd "${pkgname}"
+	echo "$(git log -1 --date=short --pretty=format:%cd|tr -d '-').$(git rev-parse --short HEAD)"
+}
 
 build() {
 	cd "${srcdir}/${pkgname}"
@@ -25,3 +30,4 @@ package() {
 	cd "${srcdir}/${pkgname}"
 	make DESTDIR="${pkgdir}" install
 }
+