mutt 1.5.23 Arch Linux PKGBUILD with sidebar patch from OpenBSD, Gentoo (based on)

PKGBUILD

# Maintainer: Alessio Sergi <asergi at archlinux dot us>
# Contributor: tobias [tobias [at] archlinux.org]
# Contributor: Gaetan Bisson <bisson@archlinux.org>

pkgname=mutt
pkgver=1.5.23
pkgrel=1
pkgdesc='Small but very powerful text-based mail client'
arch=('i686' 'x86_64')
url='http://www.mutt.org/'
license=('GPL')
depends=('gpgme' 'krb5' 'libidn' 'mime-types')
optdepends=('smtp-forwarder: to send mail')
groups=('modified')
source=("https://bitbucket.org/mutt/mutt/downloads/mutt-${pkgver}.tar.gz"
        "ftp://ftp.openbsd.org/pub/OpenBSD/distfiles/mutt/sidebar-1.5.22.diff1.gz"
        "ftp://ftp.openbsd.org/pub/OpenBSD/distfiles/mutt/trashfolder-1.5.22.diff0.gz")
sha1sums=('8ac821d8b1e25504a31bf5fda9c08d93a4acc862'
          'ed69fc3ac9a137a33956b08e2ed4243bcad0a2aa'
          'c597566c26e270b99c6f57e046512a663d2f415e')

prepare() {
  cd "$srcdir/$pkgname-$pkgver"

  # patch to add trash folder support
  patch -Np1 -i "$srcdir"/trashfolder-1.5.22.diff0

  # patch to add sidebar support
  patch -Np1 -i "$srcdir"/sidebar-1.5.22.diff1

  # fix automake issue
  autoreconf -vfi
}

build() {
  cd "$srcdir/$pkgname-$pkgver"
  ./configure --prefix=/usr --sysconfdir=/etc \
              --enable-gpgme --enable-pop \
              --enable-imap --enable-smtp \
              --enable-hcache --with-curses=/usr \
              --with-regex --with-gss=/usr \
              --with-ssl=/usr --with-sasl \
              --with-idn
  make
}

package() {
  cd "$srcdir/$pkgname-$pkgver"
  make DESTDIR="$pkgdir" install

  # remove unneeded or conflicting files
  rm "$pkgdir"/etc/mime.types{,.dist}
  rm "$pkgdir"/usr/bin/{flea,muttbug}
  rm "$pkgdir"/usr/share/man/man1/{flea,muttbug}.1

  # install Muttrc.gpg file
  install -D -m 644 contrib/gpg.rc "$pkgdir"/etc/Muttrc.gpg.dist
}