epm play: add tamtam messenger install support

prescription.d/tamtam.sh

+#!/bin/sh
+
+# TODO: common place
+fatal()
+{
+    echo "FATAL: $*" >&2
+    exit 1
+}
+
+PKGNAME=tamtam-app
+
+if [ "$1" = "--remove" ] ; then
+    epm remove $PKGNAME
+    exit
+fi
+
+[ "$1" != "--run" ] && echo "Install TamTam messenger from the official site" && exit
+
+arch="$($DISTRVENDOR --debian-arch)"
+case "$arch" in
+    amd64)
+        ;;
+    i386)
+        arch=i686
+        ;;
+    *)
+        fatal "Debian $arch arch is not supported"
+        ;;
+esac
+
+# epm uses eget to download * names
+epm install "https://download.tamtam.chat/latest/TamTam-$arch.deb"

repack.d/tamtam-app.sh

+#!/bin/sh -x
+
+# It will be run with two args: buildroot spec
+BUILDROOT="$1"
+SPEC="$2"
+
+PRODUCT=TamTam
+LIBDIR=/opt
+
+subst '1iAutoProv:no' $SPEC
+
+mkdir -p $BUILDROOT/usr/bin/
+ln -sf $LIBDIR/$PRODUCT/tamtam $BUILDROOT/usr/bin/tamtam
+
+subst "s|%files|%files\n%_bindir/tamtam|" $SPEC