Put the Arch Linux example build source in

build/arch/PKGBUILD

@@ -0,0 +1,57 @@
+# Maintainer: George Rawlinson <george@rawlinson.net.nz>
+
+pkgname=snappymail
+pkgver=2.7.2
+pkgrel=1
+pkgdesc="modern PHP webmail client"
+arch=('any')
+license=('AGPL3')
+url="https://github.com/the-djmaze/snappymail"
+depends=('php-fpm')
+makedepends=('php', 'nodejs' 'yarn' 'gulp', 'rollup')
+optdepends=('mariadb: storage backend for contacts'
+            'php-pgsql: storage backend for contacts'
+            'php-sqlite: storage backend for contacts')
+source=("$pkgname-$pkgver.tar.gz::$url/archive/v$pkgver.tar.gz"
+        "$pkgname.sysusers"
+        "$pkgname.tmpfiles")
+b2sums=('a877041eaa74ca9824323b0ba80b3515205628825ed76fccff1511b2547c27419bae4733d24f8f36e6860c671cb609c4c5f31fa19529a92c628cb714570ff8ae'
+        'e020b2d4bc694ca056f5c15b148c69553ab610b5e1789f52543aa65e098f8097a41709b5b0fc22a6a01088a9d3f14d623b1b6e9ae2570acd4f380f429301c003'
+        '2536e11622895322cc752c6b651811b2122d3ae60099fe609609d7b45ba1ed00ea729c23f344405078698d161dbf9bcaffabf8eff14b740acdce3c681c513318')
+
+prepare() {
+  sed -i "s/\$sCustomDataPath = '';/\$sCustomDataPath = '\/var\/lib\/$pkgname';/" "$pkgname-$pkgver/$pkgname/v/0.0.0/include.php"
+
+  # create folder for build output
+  mkdir -p build
+}
+
+build() {
+  cd "$pkgname-$pkgver"
+  yarn install
+
+  # build snappymail
+  php release.php --aur
+  bsdtar -x \
+    -C "$srcdir/build" \
+    -f "build/dist/releases/webmail/$pkgver/$pkgname-$pkgver.zip"
+  find . -type d -exec chmod 755 {} \;
+  find . -type f -exec chmod 644 {} \;
+}
+
+package() {
+  # directories
+  install -dm755 "$pkgdir/usr/share/snappymail" \
+    "$pkgdir/var/lib/snappymail"
+
+  # application files
+  cp -r "$srcdir/build/snappymail" "$pkgdir/usr/share/snappymail"
+  install -Dm644 -t "$pkgdir/usr/share/snappymail" "$srcdir/build/index.php"
+
+  # data files
+  cp -r "$srcdir/build/data" "$pkgdir/var/lib/snappymail"
+
+  # sysusers
+  install -Dm644 "$srcdir/$pkgname.sysusers" "$pkgdir/usr/lib/sysusers.d/$pkgname.conf"
+  install -Dm644 "$srcdir/$pkgname.tmpfiles" "$pkgdir/usr/lib/tmpfiles.d/$pkgname.conf"
+}

build/arch/snappymail.sysusers

@@ -0,0 +1 @@
+u snappymail - "Snappymail User" /var/lib/snappymail

build/arch/snappymail.tmpfiles

@@ -0,0 +1 @@
+Z /var/lib/snappymail - snappymail snappymail

release.php

@@ -264,11 +264,11 @@ if ($options['aur']) {
 
 	$b2sums = function_exists('b2sum') ? [
 		b2sum("{$tar_destination}.gz"),
-		b2sum(__DIR__ . '/arch/snappymail.sysusers'),
+		b2sum(__DIR__ . '/build/arch/snappymail.sysusers'),
-		b2sum(__DIR__ . '/arch/snappymail.tmpfiles')
+		b2sum(__DIR__ . '/build/arch/snappymail.tmpfiles')
 	] : [];
 
-	file_put_contents('arch/.SRCINFO', 'pkgbase = snappymail
+	file_put_contents('build/arch/.SRCINFO', 'pkgbase = snappymail
 	pkgdesc = modern PHP webmail client
 	pkgver = '.$package->version.'
 	pkgrel = 1
@@ -291,7 +291,7 @@ if ($options['aur']) {
 pkgname = snappymail
 ');
 
-	$file = __DIR__ . '/arch/PKGBUILD';
+	$file = __DIR__ . '/build/arch/PKGBUILD';
 	if (is_file($file)) {
 		$PKGBUILD = file_get_contents($file);
 		$PKGBUILD = preg_replace('/pkgver=[0-9.]+/', "pkgver={$package->version}", $PKGBUILD);