Playing with bspwm

bspc-spawn.sh

#!/bin/sh

# Ideas:
# Use receptacles because they spawn automatically and
# preselections are limited to one per node
#
# 1. Create receptacle and add a rule
# 2. Run command that launches window
# 3. Do whatever with the window id (like storing it in a file)
#
# Saveguards:
# Wait until rule doesn't conflict with other rules #TODO
# General timeout -> delete receptacle and rule #TODO
# Receptacle disappears -> delete rule
# Rule disappears -> delete receptacle #TODO
# Catch general failures in commands #TODO

if [ $# != 3 -a $# != 4 ]; then
    cat <<EOF
Usage: $(basename "${0}") <rule_filter> <launch_cmd> <output_cmd> [<location>]

Input:
	rule_filer
		A string that "bspc rule --add" could receive.
		For example, the classname of the application.
	launch_cmd
		Shell command to launch the application
	output_cmd
		Command that will be called like \$output_cmd \$node,
		where \$node is the id of the spawned window.
		Defaults are sensible.
	location
		A string that bspc node --insert-receptacle could receive.
		It can be used to set the position of the new receptacle.
EOF
exit 1
fi

rule_filter="$1:"
launch_cmd="$2"
output_cmd="$3"
position="$4"

export cname="${rule_filter%%:*}"
rest="${rule_filter#*:}"
iname="${rest%%:*}"
export iname="${iname:-*}"

bspc node $position --insert-receptacle
export receptacle=$(bspc query --nodes --node @brother)
bspc rule --add "$rule_filter" --one-shot hidden=on

$launch_cmd < /dev/null > /dev/null 2>&1 &

bspc subscribe node_add node_transfer |
while read d0 d1 d2 d3 d4 d5 d6; do
    if [ $d0 = node_add ]; then
        # node_add <monitor_id> <desktop_id> <ip_id> <node_id>
        node=$d4
        if bspc query --nodes --node $node.hidden > /dev/null ; then
            ncname=$(bspc query -T -n $node | jq -c '.client | .className')
            niname=$(bspc query -T -n $node | jq -c '.client | .instanceName')
            if [ "$cname" = "*" -o "\"$cname\"" = "$ncname" ] &&
               [ "$iname" = "*" -o "\"$iname\"" = "$niname" ]; then
                bspc node $node -n $receptacle --flag hidden=off
                $output_cmd $node
                break
            fi
        fi
    else
        # node_transfer <src_monitor_id> <src_desktop_id> <src_node_id>
        #               <dst_monitor_id> <dst_desktop_id> <dst_node_id>
        dst_node=$d6
        if [ $dst_node = $receptacle ]; then
            bspc rule --remove "$cname" --one-shot hidden=on
            break
        fi
    fi
done