scripts/rofi-pulse-sink.sh

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