os/overlays/pub-solar/sway-launcher.nix

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2021-05-30 19:10:28 +00:00
self: with self; ''
#!/usr/bin/env zsh
# terminal application launcher for sway, using fzf
# original command:
# Based on: https://github.com/swaywm/sway/issues/1367
# bindsym $altkey+space exec termite --name=launcher -e \
# "bash -c 'compgen -c | sort -u | fzf --no-extended --print-query | \
# tail -n1 | xargs -r swaymsg -t command exec'"
HIST_FILE="''${XDG_CACHE_HOME:-$HOME/.cache}/sway-launcher-history.txt"
# Get shell command list
# This may include the occasional non-executable file
command_list=$({ whence -wm '*' | sed 's/:[^:]*$//' })
# read existing command history
if [ -f "$HIST_FILE" ]; then
command_history=$(cat "$HIST_FILE")
else
command_history=""
fi
# search command list
command_str=$(printf "%s\n" "''${command_history}" "''${command_list}" | \
sed -E 's/^[0-9]+ (.+)$/\1/' | \
fzf --exact --no-extended --print-query --no-sort | \
tail -n1) || exit 1
if [ "$command_str" = "" ]; then
exit 1
fi
# echo "Command: $command_str"
# using \E flag from perl regex
test "''${command_str#*\\E}" != "$command_str" && echo "command can't contain '\E'"
test "''${command_str#*\\E}" != "$command_str" && exit 1
# get full line from history (with count number)
hist_line=$(echo "$command_history" | grep -Pe "^[0-9]+ \Q$command_str\E$")
# echo "Hist Line: $hist_line"
if [ "$hist_line" = "" ]; then
hist_count=1
else
# Increment usage count
hist_count=$(echo "$hist_line" | sed -E 's/^([0-9]+) .+$/\1/')
hist_count=$((hist_count + 1))
# delete line, to add updated later
# echo "Hist Before: $command_history"
command_history=$(echo "$command_history" | \
grep --invert-match -Pe "^[0-9]+ \Q$command_str\E$")
# echo "Hist After: $command_history"
fi
# update history
update_line="''${hist_count} ''${command_str}"
printf "%s\n" "''${update_line}" "''${command_history}" | \
sort --numeric-sort --reverse > "$HIST_FILE"
# echo "$update_line"
# execute command
echo "$command_str"
${sway}/bin/swaymsg -t command exec "$command_str"
''