epm play switch-to-pipewire: added install mode

prescription.d/switch-to-pipeware.sh

-#!/bin/sh
-
-[ "$1" != "--run" ] && echo "Switch to using Pipeware" && exit
-
-. $(dirname $0)/common.sh
-
-assure_root
-exit
-
-if [ "$(epm print info -s)" = "rosa" ] ; then
-    dnf_auto='' && [ -n "$auto" ] && dnf_auto='-y'
-    a= dnf swap pulseaudio pipewire --allow-erasing $dnf_auto
-    exit
-fi
-
-[ "$(epm print info -s)" = "alt" ] || fatal "Only ALTLinux or ROSA are supported"
-
-
-epm install pipewire pipewire-utils pipewire-libs
-# TODO: user??
-a= systemctl --user --now disable pulseaudio.service pulseaudio.socket
-a= systemctl --user --now enable pipewire pipewire-pulse
-a= systemctl --user --now enable pipewire-media-session.service
-a= systemctl --user mask pulseaudio
-#systemctl reboot
-
-echo "Done. Just you need reboot your system to use Pipeware."

prescription.d/switch-to-pipewire.sh

+#!/bin/sh
+
+[ "$1" != "--run" ] && echo "Switch to using Pipeware" && exit
+
+. $(dirname $0)/common.sh
+
+
+display_help()
+{
+    echo "
+Использование: epm play switch-to-pipewire [option]
+--global
+    Запуск под рутом: нужен для глобального включения(enable) службы pipewire после установки. 
+    Но запуск(start) этой службы глобально невозможен, так как pipewire работает под пользователем. 
+
+--user
+    Запуск под пользователем: можно сразу включить(enable) службу и запустить(start) её, 
+    но только для конкретного пользователя, у остальных пользователей остаётся pulseaudio."
+    exit
+}
+
+case "${3}" in
+
+    '--user' )
+        is_root && fatal "User installation possible only without root"
+        args='--user --now' ;;
+
+    '--global')
+        assure_root
+        args='--global' ;;
+
+    '--help' | *)
+        display_help;;
+esac
+
+
+if [ "$(epm print info -s)" = "rosa" ]; then
+    dnf_auto='' && [ -n "$auto" ] && dnf_auto='-y'
+    a= dnf swap pulseaudio pipewire --allow-erasing $dnf_auto
+    exit
+fi
+
+[ "$(epm print info -s)" = "alt" ] || fatal "Only ALTLinux or ROSA are supported"
+
+epm update
+
+epm install pipewire pipewire-utils pipewire-libs
+# TODO: user??
+a= systemctl $args disable pulseaudio.service pulseaudio.socket
+a= systemctl $args enable pipewire pipewire-pulse
+a= systemctl $args enable pipewire-media-session.service
+a= systemctl $args mask pulseaudio
+#systemctl reboot
+
+echo "Done."
+if [[ $args == '--global' ]]; then
+    echo 'Just you need restart your session to use Pipeware'
+fi
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