prescription: add Visual Studio Code install

prescription.d/code.sh

+#!/bin/sh -x
+
+# TODO: common place
+fatal()
+{
+    echo "FATAL: $*" >&2
+    exit 1
+}
+
+PKGNAME=code
+
+if [ "$1" = "--remove" ] ; then
+    epm remove $PKGNAME
+    exit
+fi
+
+[ "$1" != "--run" ] && echo "Install Visual Studio Code from the official site" && exit
+
+arch="$($DISTRVENDOR -a)"
+case "$arch" in
+    x86_64)
+        arch=x64
+        ;;
+    armhf)
+        ;;
+    aarch64)
+        arch=arm64
+        ;;
+    *)
+        fatal "$arch arch is not supported"
+        ;;
+esac
+
+pkgtype="$($DISTRVENDOR -p)"
+repack=''
+
+case "$pkgtype" in
+    deb)
+        repack='--repack'
+        ;;
+    rpm)
+        ;;
+    *)
+        fatal "Package format $pkgtype is not supported yet"
+esac
+
+# we have workaround for their postinstall script, so always repack rpm package
+[ "$($DISTRVENDOR -p)" = "deb" ] || repack='--repack'
+
+PKG=/tmp/$PKGNAME.$pkgtype
+# TODO: wget does not support:  Content-Disposition: attachment; filename="code-1.52.1-1608137084.el7.x86_64.rpm"
+$EGET -O $PKG "https://code.visualstudio.com/sha/download?build=stable&os=linux-$pkgtype-$arch" || fatal
+
+epm install $repack "$PKG" || exit
+rm -fv $PKG

repack.d/code.sh

+#!/bin/sh -x
+
+# It will be run with two args: buildroot spec
+BUILDROOT="$1"
+SPEC="$2"
+
+PRODUCT=code
+
+subst '1iAutoReq:yes,nomonolib,nomono' $SPEC
+subst '1iAutoProv:no' $SPEC
+
+subst 's|\(.*/usr/share/code/code.*\)|"/usr/bin/code"\n"/usr/bin/vscode"\n\1|' $SPEC
+
+mkdir -p $BUILDROOT/usr/bin/
+ln -rs $BUILDROOT/usr/share/code/code $BUILDROOT/usr/bin/code
+ln -rs $BUILDROOT/usr/share/code/code $BUILDROOT/usr/bin/vscode
+
+# install all requires packages before packing (the list have got with rpmreqs package | xargs echo)
+epm install --skip-installed at-spi2-atk coreutils findutils firefox gawk glib2 libalsa libatk libat-spi2-core libcairo libdbus libdrm libexpat libgbm libgdk-pixbuf libgio libgtk+3 libnspr libnss libpango libsecret libX11 libxcb libXcomposite libXcursor libXdamage libXext libXfixes libXi libxkbfile libXrandr libXrender libXScrnSaver libXtst sed