update_pkgbuild.patch

--- a/PKGBUILD	2018-11-20 07:42:48.076332191 -0500
+++ b/PKGBUILD	2018-11-20 09:40:14.684141902 -0500
@@ -1,10 +1,13 @@
 # Maintainer: Chocobo1 <chocobo1 AT archlinux DOT net>
+# Contributer: graysky <graysky AT archlinux DOT us>
 
 pkgname=wireguard-module
-pkgver=0.0.20181018
+_pkgname=WireGuard
+pkgver=0.0.20181119
+_extramodules=extramodules-ARCH
 pkgrel=1
 pkgdesc="Fast, modern, secure VPN tunnel (kernel module)"
-arch=('i686' 'x86_64')
+arch=('x86_64')
 url="https://www.wireguard.com/"
 license=('GPL')
 depends=('linux>=3.10')
@@ -12,20 +15,18 @@ makedepends=('linux-headers>=3.10' 'xz')
 provides=('WIREGUARD-MODULE')
 conflicts=('WIREGUARD-MODULE')
 source=("https://git.zx2c4.com/WireGuard/snapshot/WireGuard-$pkgver.tar"{.xz,.asc})
-sha256sums=('af05824211b27cbeeea2b8d6b76be29552c0d80bfe716471215e4e43d259e327'
+sha256sums=('7d47f7996dd291069de4efb3097c42f769f60dc3ac6f850a4d5705f321e4406b'
             'SKIP')
 validpgpkeys=('AB9942E6D4A4CFC3412620A749FC7012A5DE03AE')  # Jason A. Donenfeld <Jason@zx2c4.com>
 
-
 build() {
-  cd "WireGuard-$pkgver/src"
-
-  make module
+  cd "$_pkgname-$pkgver"
+  make -C src/ module
 }
 
 package() {
-  cd "WireGuard-$pkgver/src"
-
-  find './' -name '*.ko' -exec xz -0 --force {} \;
-  install -Dm644 'wireguard.ko.xz' "$pkgdir/usr/lib/modules/extramodules-ARCH/wireguard.ko.xz"
+  cd "$_pkgname-$pkgver"
+  xz -0 src/wireguard.ko
+  install -Dm644 src/wireguard.ko.xz "$pkgdir/usr/lib/modules/$_extramodules/wireguard.ko.xz"
 }
+

@Chocobo1 -

Sure: line 11 and 44 allows one to easily define the location of the kernel's extramodules whereas hard-coding it is more of a pain to edit. This makes it easier to build for custom kernels (different names) and for other architectures (like raspberry pi and other Arch ARM kernels).

For the pkgver var... I would keep it as you have which matches the wireguard-tools package ... since upstream is numbering commits, it's more consistent with a normal release rather than a -git release.