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#!/usr/bin/env bash
# terminal application launcher for sway, using fzf
# Based on: https://gitlab.com/FlyingWombat/my-scripts/blob/master/sway-launcher
shopt -s nullglob
if [[ "$1" = 'describe' ]]; then
shift
if [[ $2 == 'command' ]]; then
title=$1
readarray arr < <(whatis -l "$1" 2>/dev/null)
description="${arr[0]}"
description="${description%*-}"
else
title=$(sed -ne '/^Name=/{s/^Name=//;p;q}' "$1")
description=$(sed -ne '/^Comment=/{s/^Comment=//;p;q}' "$1")
fi
echo -e "\033[33m $title \033[0m"
echo "${description:-No description}"
exit
fi
HIST_FILE="${XDG_CACHE_HOME:-$HOME/.cache}/${0##*/}-history.txt"
DIRS=(
/usr/share/applications
"$HOME/.local/share/applications"
/usr/local/share/applications
)
GLYPH_COMMAND=" "
GLYPH_DESKTOP=" "
touch "$HIST_FILE"
readarray HIST_LINES < "$HIST_FILE"
FZFPIPE=$(mktemp)
PIDFILE=$(mktemp)
trap 'rm "$FZFPIPE" "$PIDFILE"' EXIT INT
# Append Launcher History, removing usage count
( printf '%s' "${HIST_LINES[@]#* }" >> "$FZFPIPE" ) &
# Load and append Desktop entries
(
for dir in "${DIRS[@]}"; do
[[ -d "$dir" ]] || continue
awk -v pre="$GLYPH_DESKTOP" -F= '
BEGINFILE{p=0;}
/^Type=Application/{p=1;}
/^Name=/{name=$2;}
ENDFILE{if (p) print FILENAME "|desktop|\033[33m" pre name "\033[0m";}' \
"$dir/"*.desktop < /dev/null >> "$FZFPIPE"
# the empty stdin is needed in case no *.desktop files
done
) &
# Load and append command list
(
IFS=:
read -ra path <<< "$PATH"
for dir in "${path[@]}"; do
printf '%s\n' "$dir/"* |
awk -F / -v pre="$GLYPH_COMMAND" '{print $NF "|command|\033[31m" pre "\033[0m" $NF;}'
done | sort -u >> "$FZFPIPE"
) &
COMMAND_STR=$(
(tail -n +0 -f "$FZFPIPE" & echo $! > "$PIDFILE") |
fzf +s -x -d '\|' --nth ..3 --with-nth 3.. \
--preview "$0 describe {1} {2}" \
--preview-window=up:3:wrap --ansi
kill -9 "$(<"$PIDFILE")" | tail -n1
) || exit 1
[ -z "$COMMAND_STR" ] && exit 1
# update history
for i in "${!HIST_LINES[@]}"; do
if [[ "${HIST_LINES[i]}" == *" $COMMAND_STR"$'\n' ]]; then
HIST_COUNT=${HIST_LINES[i]%% *}
HIST_LINES[$i]="$((HIST_COUNT + 1)) $COMMAND_STR"
match=1
break
fi
done
if ! (( match )); then
HIST_LINES+=("1 $COMMAND_STR"$'\n')
fi
printf '%s' "${HIST_LINES[@]}" | sort -nr > "$HIST_FILE"
command='echo "nope"'
# COMMAND_STR is "<string>|<type>"
case ${COMMAND_STR#*|} in
desktop*)
# .desktop files use "%f", "%d" as placeholders for "Open with..."
command=$(sed -ne 's/%.//; /^Exec/{s/^Exec=//;p;q}' "${COMMAND_STR%%|*}")
;;
command*)
command="${COMMAND_STR%%|*}"
;;
esac
swaymsg -t command exec "$command"
|
