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44 lines
1.1 KiB
Bash
Executable File
44 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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# i3blocks persist-mode volume indicator.
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#
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# Event-driven: blocks in `read` on the `pactl subscribe` event stream.
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# No sleep, no polling loop, no awk/tr/grep forks. One pactl-subscribe
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# process stays alive; two short pactl calls run only on actual events.
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#
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# Configure with `interval=persist` and `markup=pango` in the i3blocks
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# config. In persist mode each newline is a separate status update, so
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# we emit exactly ONE line (with inline pango markup for color).
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set -u
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GREEN='#50FA7B'
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RED='#FF5555'
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emit() {
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local raw mute vol icon color
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raw=$(pactl get-sink-volume @DEFAULT_SINK@ 2> /dev/null) || return 0
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if [[ $raw =~ ([0-9]+)% ]]; then
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vol=${BASH_REMATCH[1]}
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else
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vol=0
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fi
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mute=$(pactl get-sink-mute @DEFAULT_SINK@ 2> /dev/null) || return 0
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if [[ $mute == *yes ]]; then
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icon='🔇'
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color=$RED
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else
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icon='🔊'
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color=$GREEN
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fi
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printf '<span color="%s">%s %s%%</span>\n' "$color" "$icon" "$vol"
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}
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emit
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# `read -r` blocks on the event stream — no busy-wait, no sleep.
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pactl subscribe 2> /dev/null | while read -r line; do
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[[ $line == *"on sink"* || $line == *"on server"* ]] || continue
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emit
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done
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