epm play: add mattermost-desktop

play.d/mattermost-desktop.sh

+#!/bin/sh
+
+PKGNAME=mattermost-desktop
+SUPPORTEDARCHES="x86_64 aarch64"
+VERSION="$2"
+DESCRIPTION="Mattermost Desktop application for Linux from the official site"
+URL="https://mattermost.com/"
+
+. $(dirname $0)/common.sh
+
+arch="$(epm print info -a)"
+case "$arch" in
+    x86_64)
+        arch=amd64
+        ;;
+    aarch64)
+        arch=arm64
+        ;;
+    *)
+        fatal "$arch arch is not supported"
+        ;;
+esac
+
+PKGURL=$(epm tool eget --list --latest https://github.com/mattermost/desktop/releases $(epm print constructname $PKGNAME "$VERSION*" $arch "deb")) || fatal "Can't get package URL"
+
+epm install --repack "$PKGURL"
+

repack.d/mattermost-desktop.sh

+#!/bin/sh -x
+
+# It will be run with two args: buildroot spec
+BUILDROOT="$1"
+SPEC="$2"
+
+PRODUCTDIR=/opt/Mattermost
+
+. $(dirname $0)/common.sh
+
+add_electron_deps
+
+add_bin_link_command
+
+fix_chrome_sandbox
+
+fix_desktop_file