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#!/bin/zsh
workspaces=$(i3-msg -t get_workspaces | grep -Po '"name":.*?[^\\]"' | sed 's/"name":"\([^"]\+\)"/\1/g')
if [[ ! -z $1 ]]; then
target=$(echo $workspaces | grep "$1")
[[ -z $target ]] && target=$1
else
used_numbers=$(echo $workspaces | awk 'BEGIN { FS = ":" } ; { print $1 }')
max_number=$(echo $used_numbers | tail -1)
lowest_gap=$(echo $used_numbers | awk '$1!=p+1{print p+1}{p=$1}' | head -1)
[[ -z $lowest_gap ]] && new_number=$(($max_number + 1)) || new_number=$lowest_gap
target=$(echo $workspaces | dmenu -i -sf green -p "Go to workspace:")
[[ -z $target ]] && exit
[[ ! $target = [0-9]* ]] && target=$new_number:$target
fi
echo $target
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