Added Arch Linux PKGBUILD file

PKGBUILD

@@ -0,0 +1,42 @@
+# Maintainer: Eldar Tsraev <elts@culab.org>
+pkgname=restic-git
+pkgver=
+pkgrel=1
+pkgdesc="Restic is a program that does backups right."
+arch=('i686' 'x86_64')
+url="https://github.com/restic/restic"
+license=('BSD')
+depends=('glibc')
+makedepends=('git' 'go')
+provides=('restic')
+conflicts=('restic')
+source=('restic-git::git+https://github.com/restic/restic')
+md5sums=('SKIP') #generate with 'makepkg -g'
+
+pkgver() {
+  cd "$srcdir/$pkgname"
+  printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)";
+}
+
+prepare() {
+  # git repo fetched by makepkg and it is possible to calculate a fancy version number.
+  # On the other hand we don't need to re-download source code with go-get...
+  export GOPATH="$srcdir"
+  export gorepo="github.com/restic/restic"
+  mkdir -p $GOPATH/src/github.com/restic
+  rm -rf $GOPATH/src/$gorepo
+  mv $srcdir/$pkgname $GOPATH/src/$gorepo
+}
+
+build() {
+  go get -v $gorepo/cmd/restic
+}
+
+package() {
+  # Copying file(s)
+  install -Dm755 $GOPATH/bin/restic $pkgdir/usr/bin/restic
+  # Copying LICENCE file
+  install -Dm644 $GOPATH/src/$gorepo/LICENSE $pkgdir/usr/share/licenses/$pkgname/LICENSE
+}
+
+# vim:set ts=2 sw=2 et: