New rofi script to manage pulseaudio output sink
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#!/bin/sh
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#
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# Purpose {{{
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# This script will …
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# 1. …
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# …
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#
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# 2021-11-27
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# }}}
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# Vars {{{
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readonly PROGNAME=$(basename "${0}")
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readonly PROGDIR=$(readlink -m $(dirname "${0}"))
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readonly ARGS="${*}"
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readonly NBARGS="${#}"
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[ -z "${DEBUG}" ] && DEBUG=1
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## Export DEBUG for sub-script
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export DEBUG
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# Default values for some vars
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readonly MY_VAR_XY_DEFAULT="666"
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## Colors
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readonly PURPLE='\033[1;35m'
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readonly RED='\033[0;31m'
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readonly RESET='\033[0m'
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readonly COLOR_DEBUG="${PURPLE}"
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## Rofi colors
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readonly BLACK="#000000"
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readonly BLUE="#0094cc"
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# }}}
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usage() { # {{{
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cat <<- EOF
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usage: $PROGNAME [-d|-h]
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Try to give a description…
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EXAMPLES :
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- Apply my script to…
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${PROGNAME}
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OPTIONS :
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-d,--debug
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Enable debug messages.
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-h,--help
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Print this help message.
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EOF
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}
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# }}}
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debug_message() { # {{{
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local_message="${1}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_message}"
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return 0
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}
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# }}}
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error_message() { # {{{
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local_error_message="${1}"
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local_error_code="${2}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}"
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exit "${local_error_code:=66}"
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}
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# }}}
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define_vars() { # {{{
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## Temp file vars {{{
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readonly pa_sink_list_path="/tmp/${PROGNAME}.list"
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## }}}
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}
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# }}}
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is_command_absent() { # {{{
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local_command_absent_cmd="${1}"
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## A command is absent by default
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return_command_absent="0"
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if [ "$(command -v ${local_command_absent_cmd})" ]; then
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debug_message "is_command_absent − \
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${RED}${local_command_absent_cmd}${COLOR_DEBUG} seems present on this host."
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return_command_absent="1"
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else
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debug_message "is_command_absent − \
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${RED}${local_command_absent_cmd}${COLOR_DEBUG} is not available on this host."
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return_command_absent="0"
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fi
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return "${return_command_absent}"
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}
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# }}}
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get_pulseaudio_sink_list() { # {{{
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## Return False by default
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return_get_pulseaudio_sink_list="1"
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debug_message "get_pulseaudio_sink_list − \
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Create or empty ${RED}${pa_sink_list_path}${COLOR_DEBUG} file to store pulseaudio sinks."
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true > "${pa_sink_list_path}"
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## Get sinks list with pactl (index and description)
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## Merge every two lines
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if pactl list sinks | \
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grep --only-matching --perl-regexp '((?<=Sink #)[[:digit:].]*|(?<=Description: ).*)' | \
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paste --delimiters=" " - - > "${pa_sink_list_path}"; then
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if [ -s "${pa_sink_list_path}" ]; then
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debug_message "get_pulseaudio_sink_list − \
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PulseAudio sinks list successfully created (see ${pa_sink_list_path} file)."
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return_get_pulseaudio_sink_list="0"
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else
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debug_message "get_pulseaudio_sink_list − \
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Error, the PulseAudio sinks list is empty (${pa_sink_list_path} file)."
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return_get_pulseaudio_sink_list="1"
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fi
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else
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debug_message "get_pulseaudio_sink_list − \
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Error in ${RED}pacmd list-sinks${COLOR_DEBUG} command."
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return_get_pulseaudio_sink_list="1"
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fi
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return "${return_get_pulseaudio_sink_list}"
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}
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# }}}
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choose_pulseaudio_sink() { # {{{
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## Return False by default
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return_choose_pulseaudio_sink="1"
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debug_message "choose_pulseaudio_sink − \
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Display PulseAudio sinks list with rofi to select one."
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choosen_sink=$(rofi -location 2 -lines 4 -no-auto-select -i -dmenu -p "Choose new default output sink for PulseAudio" -color-enabled -color-normal "${BLACK},${BLUE},${BLACK},${BLUE},${BLACK}" -color-window "${BLACK},${BLACK}" < "${pa_sink_list_path}")
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choosen_sink_index=$(printf -- '%s' "${choosen_sink}" | cut --delimiter=" " --field=1)
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choosen_sink_description=$(printf -- '%s' "${choosen_sink}" | cut --delimiter=" " --field=2-)
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## If no sink was selected (empty var)
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if [ -z "${choosen_sink_index}" ]; then
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debug_message "choose_pulseaudio_sink − \
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Choosen sink var is ${RED}empty${COLOR_DEBUG}."
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return_choose_pulseaudio_sink="1"
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else
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debug_message "choose_pulseaudio_sink − \
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PulseAudio choosen sink is ${RED}${choosen_sink_description}${COLOR_DEBUG} (index: ${RED}${choosen_sink_index}${COLOR_DEBUG})."
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return_choose_pulseaudio_sink="0"
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fi
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return "${return_choose_pulseaudio_sink}"
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}
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# }}}
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set_default_pulseaudio_sink() { # {{{
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## Return False by default
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return_set_default_pulseaudio_sink="1"
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debug_message "set_default_pulseaudio_sink − \
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Try to set ${RED}${choosen_sink_description}${COLOR_DEBUG} (index: ${RED}${choosen_sink_index}${COLOR_DEBUG}) default PulseAudio sink."
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if pactl set-default-sink "${choosen_sink_index}"; then
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debug_message "set_default_pulseaudio_sink − \
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${RED}${choosen_sink_description}${COLOR_DEBUG} is now the default output device."
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return_set_default_pulseaudio_sink="0"
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else
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debug_message "set_default_pulseaudio_sink − \
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Error with ${RED}pacmd set-default-sink${COLOR_DEBUG} command."
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return_set_default_pulseaudio_sink="1"
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fi
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return "${return_set_default_pulseaudio_sink}"
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}
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# }}}
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main() { # {{{
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## If rofi command is absent from the system {{{
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### Exit
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is_command_absent "rofi" \
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&& exit 0
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## }}}
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## If pacmd command is absent from the system {{{
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### Exit
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is_command_absent "pacmd" \
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&& exit 0
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## }}}
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## Define all vars
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define_vars
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## Try to get the sinks list {{{
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### OR Exit with error message
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get_pulseaudio_sink_list \
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|| error_message "Can't get the PulseAudio sinks list. Please use --debug option." 1
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## }}}
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## Choose a sink with rofi {{{
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### OR Exit with error message
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choose_pulseaudio_sink \
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|| error_message "Can't get the PulseAudio sinks list. Please use --debug option." 2
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## }}}
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## Set default output sink/device for PulseAudio {{{
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### OR Exit with error message
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set_default_pulseaudio_sink \
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|| error_message "Can't set the selected sink (${choosen_sink_description}) as default output sink/device. Please use --debug option." 3
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## }}}
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}
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# }}}
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# Manage arguments # {{{
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# This code can't be in a function due to argument management
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if [ ! "${NBARGS}" -eq "0" ]; then
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manage_arg="0"
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## If the first argument is not an option
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if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
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then
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## Print help message and exit
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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fi
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# Parse all options (start with a "-") one by one
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while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
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case "${1}" in
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-d|--debug ) ## debug
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DEBUG=0
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;;
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-h|--help ) ## help
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usage
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## Exit after help informations
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exit 0
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;;
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#-v|--var ) ## Define var with given arg
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### Move to the next argument
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#shift
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### Define var
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#readonly my_var_xy="${1}"
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#;;
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* ) ## unknow option
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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;;
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esac
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debug_message "Arguments management − \
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${RED}${1}${COLOR_DEBUG} option managed."
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## Move to the next argument
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shift
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manage_arg=$((manage_arg+1))
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done
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debug_message "Arguments management − \
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${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
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else
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debug_message "Arguments management − \
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No arguments/options to manage."
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fi
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# }}}
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main
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exit 255
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