parallel: Seperate prepare()

parallel/PKGBUILD

@@ -1,29 +1,33 @@
-# $Id$
 # Maintainer: David Mott <mott.david.j@gmail.com>
+# Contributor: Niklas Holm <jadedcyborg@gmail.com>
 
-pkgname=parallel
-pkgver=20180522
-pkgrel=1
+pkgname='parallel'
+pkgver='20180522'
+pkgrel='1'
 pkgdesc='A shell tool for executing jobs in parallel'
 arch=('any')
 url='https://www.gnu.org/software/parallel/'
 license=('GPL3')
 depends=('perl')
 source=(
-    https://ftp.gnu.org/gnu/$pkgname/$pkgname-$pkgver.tar.bz2
-    0001-support-MSys2.patch
+    "https://ftpmirror.gnu.org/gnu/${pkgname}/${pkgname}-${pkgver}.tar.bz2"
+    "0001-support-MSys2.patch"
 )
 sha1sums=('e148aebb83dd5d2fa462cb04f7274a45ff93eb92'
           '19a51783dd9c2f50e6aee167a6c70ca05bad99e8')
 
-build() {
-  cd "$pkgname-$pkgver"
+prepare() {
+  cd "${srcdir}/${pkgname}-${pkgver}"
   patch -p1 -i "${srcdir}/0001-support-MSys2.patch"
-  ./configure --prefix=/usr
+}
+
+build() {
+  cd "${srcdir}/${pkgname}-${pkgver}"
+  ./configure --prefix="/usr"
   make
 }
 
 package() {
-  cd "$pkgname-$pkgver"
-  make DESTDIR="$pkgdir/" install
+  cd "${srcdir}/${pkgname}-${pkgver}"
+  make DESTDIR="${pkgdir}" install
 }