Modified version of skypeforlinux-stable-bin PKGBUILD that extracts the installation from the snap package

PKGBUIILD

# Maintainer: mark.blakeney at bullet-systems dot net
# Original Maintainer: Jameson Pugh <imntreal@gmail.com>

_pkgname=skypeforlinux
pkgname="$_pkgname-stable-bin"
pkgver=8.113.0.210
_snap_id=QRDEfjn4WJYnm0FzDKwqqRZZI77awQEV
_snap_rev=330
pkgrel=1
pkgdesc="Skype for Linux - Stable/Release Version"
arch=("x86_64")
url="http://www.skype.com"
license=("custom")
makedepends=("squashfs-tools" "desktop-file-utils")
depends=("gtk3" "libxss" "alsa-lib" "libxtst" "libsecret" "nss"
         "glibc>=2.28-4")
optdepends=("org.freedesktop.secrets: keyring/password support"
            "libappindicator-gtk3: systray icon support")
conflicts=("$_pkgname"  "$_pkgname-preview-bin" "skype")
provides=("$_pkgname" "skype")
install="$pkgname-install"
source=(
"${_pkgname}_${pkgver}_${_snap_rev}_amd64.snap::https://api.snapcraft.io/api/v1/snaps/download/${_snap_id}_${_snap_rev}.snap"
"skypeforlinux-launcher"
)
sha256sums=('ab0cc12e3967b991c8b059060449ab4fb5add3a8f2299f72c97f3fd7af8c0b05'
            '33bf5143ae89fc19db076a2bbaa42dc99fafd15a67be8ab73a9a5e8ed2cb4a1d')

prepare() {
  unsquashfs -f "$srcdir/${_pkgname}_${pkgver}_${_snap_rev}_amd64.snap"
}

package() {
  basedir="$srcdir/squashfs-root"

  install -d "$pkgdir/usr/bin" "$pkgdir/usr/share" "$pkgdir/usr/share/applications" "$pkgdir/usr/share/doc" "$pkgdir/usr/share/licenses/$pkgname"

  cp "$basedir/usr/share/$_pkgname/LICENSES.chromium.html" "$pkgdir/usr/share/licenses/$pkgname/"
  cp -r "$basedir/usr/share/$_pkgname" "$pkgdir/usr/share"
  cp -r "$basedir/usr/share/doc/$_pkgname" "$pkgdir/usr/share"
  cp -r "$basedir/usr/share/kservices5" "$pkgdir/usr/share"
  cp -r "$basedir/usr/share/pixmaps" "$pkgdir/usr/share"

  for size in 16x16 32x32 256x256 512x512 1024x1024; do
    install -D "$basedir/usr/share/icons/hicolor/$size/apps/${_pkgname}.png" "$pkgdir/usr/share/icons/hicolor/$size/apps/${_pkgname}.png"
  done

  install -m755 "$srcdir/skypeforlinux-launcher" "$pkgdir/usr/bin/skypeforlinux"

  install -t "$pkgdir/usr/share/applications/" "$basedir/snap/gui/skypeforlinux.desktop" "$basedir/snap/gui/skypeforlinux-share.desktop"
  desktop-file-edit "$pkgdir/usr/share/applications/skypeforlinux.desktop" --set-icon $_pkgname --set-key Exec --set-value "/usr/bin/skypeforlinux %U"
  desktop-file-edit "$pkgdir/usr/share/applications/skypeforlinux-share.desktop" --set-icon $_pkgname --set-key Exec --set-value "/usr/bin/skypeforlinux --share-file=%f"

  # desktop-file-edit can't handle actions (like the quit one in skypeforlinux.desktop) so fix up the shutdown command manually
  sed -i "$pkgdir/usr/share/applications/skypeforlinux.desktop" -e 's|Exec=skype --shutdown|Exec=/usr/bin/skypeforlinux --shutdown|'
}

# vim:set ts=2 sw=2 et:

skypeforlinux-launcher

#!/bin/sh

SCRIPT=$(readlink -f "$0")
USR_DIRECTORY=$(readlink -f $(dirname $SCRIPT)/..)

SKYPE_PATH="$USR_DIRECTORY/share/skypeforlinux/skypeforlinux"
SKYPE_LOGS="$HOME/.config/skypeforlinux/logs"

mkdir -p $SKYPE_LOGS

nohup "$SKYPE_PATH" --executed-from="$(pwd)" --pid=$$ "$@" > "$SKYPE_LOGS/skype-startup.log" 2>&1 &

skypeforlinux-stable-bin-install

_pkgname="skypeforlinux"
_userns="kernel.unprivileged_userns_clone"

post_install() {
    userns="$(sysctl -n $_userns 2>/dev/null)"
    if [[ $? -eq 0 && $userns -ne 1 ]]; then
	echo -ne "\e[34;1m"
	echo ===
	echo === !!! WARNING !!!
	echo ===
	echo === $_userns is not set on this system.
	echo === You will need to set it manually so $_pkgname can start.
	echo ===
	echo -ne "\033[0m"
    fi
}

post_upgrade() {
    post_install
}