MPV: Extract socket path from command line

mpv.controller.sh

@@ -3,15 +3,13 @@
 # Purpose {{{
 # This script will try to control MPV with IPC socket
 #   1. Check for MPV proc with IPC socket option.
-#   2. Verify if a process runs with one of the expected socket.
-#      Unable to correctly extract socket path from command line…
+#   2. Extract the newest socket path from command line.
 #   3. Send user command to the last MPV process with a existing socket.
 #
 # 2022-05-22
 # }}}
 # TODO {{{
 # * Add an option to set the socket path.
-# * Set a list of sockets path and use the first existing one.
 # * Add new user command ?
 # }}}
 # Vars {{{
@@ -24,9 +22,10 @@ readonly NBARGS="${#}"
 export DEBUG
 
 ## Default values for some vars
-readonly MPV_PROC_REGEXP="mpv.*--input-ipc-server"
+readonly MPV_PROC_REGEXP="mpv.*--input-ipc-server="
 readonly USER_MULTIMEDIA_COMMAND_DEFAULT="toggle"
-readonly MPV_POSSIBLE_SOCKET_PATH="${HOME}/.cache/qutebrowser/mpv.ipc.socket"
+MPV_POSSIBLE_SOCKET_PATH=$(pgrep --newest --full --list-full -- "^${MPV_PROC_REGEXP}" | sed -n -e "s/.*${MPV_PROC_REGEXP}\(.*\) .*/\1/p;q")
+readonly MPV_POSSIBLE_SOCKET_PATH
 
 ## Colors
 readonly PURPLE='\033[1;35m'
@@ -91,8 +90,6 @@ error_message() {                                               # {{{
 define_vars() {                                                 # {{{
 
 	## Get the socket path of the last MPV process {{{
-	## Can't extract a valid socket path from the command line !
-	## So… no other choice than test a static list of possible socket
 	MPV_SOCKET_PATH="${MPV_POSSIBLE_SOCKET_PATH}"
 	debug_message "define_vars − \
 IPC socket path for the last MPV process : ${RED}${MPV_SOCKET_PATH}${COLOR_DEBUG} ."