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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
HIST_FILE="${XDG_CACHE_HOME:-$HOME/.cache}/sway-launcher-history.txt"
DIRS=(
/usr/share/applications
~/.local/share/applications
/usr/local/share/applications
)
GLYPH_COMMAND=" "
GLYPH_DESKTOP=" "
touch "$HIST_FILE"
# Filter DIRS array for directories that actually exist. Append *.desktop to remaining elements
for i in "${!DIRS[@]}" ; do [[ ! -d "${DIRS[i]}" ]] && unset -v 'DIRS[$i]' || DIRS[$i]="${DIRS[i]}/*.desktop" ; done
DIRS=("${DIRS[@]}")
HIST_FILE_CONTENT=$(< "$HIST_FILE")
function createPreview(){
DESCRIPTION='No description'
if [[ $2 == 'command' ]]; then
TITLE=$1
DESCRIPTION=$(whatis -l "$1" 2>/dev/null | head -n1 | sed -n -e 's/^.*\(.*\).*\-//p')
else
TITLE=$(cat $1 | grep ^Name= | head -n1 | awk -F= '{print $2}')
DESCRIPTION=$(grep Comment= "$1" | awk -F= '{print $2}')
fi
echo -e "\033[33m $TITLE \033[0m"
echo "$DESCRIPTION"
}
export -f createPreview
FZFPIPE=$(mktemp)
# Append Launcher History, removing usage count
(echo "$HIST_FILE_CONTENT" | sed -n -e 's/^[0-9]* //p' >> "$FZFPIPE" )&
# Load and append Desktop entries
(grep -roP "Type=Application" ${DIRS[@]} |
awk -F : '{print $1}' |
sort -u |
xargs -d "\n" grep -oP "(?<=Name=).*" |
awk -F : -v pre="$GLYPH_DESKTOP" '{print $1 "|desktop|\033[33m" pre "\033[0m" $2}' >> "$FZFPIPE" )&
# Load and append command list
({ IFS=:; ls -H $PATH; } | grep -v '/.*' | sort -u | awk -v pre="$GLYPH_COMMAND" '{print $1 "|command|\033[31m" pre "\033[0m" $1 }' >> "$FZFPIPE" )&
COMMAND_STR=$( (tail -f "$FZFPIPE" & echo $! > pid) |
fzf +x +s -d '\|' --nth ..3 --with-nth 3.. --preview 'createPreview {1} {2}' --preview-window=up:3:wrap --ansi ; kill -9 "$(<pid)" |
tail -n1) || exit 1
[ -z "$COMMAND_STR" ] && exit 1
# get full line from history (with count number)
HIST_LINE=$(echo "$HIST_FILE_CONTENT" | grep -Pe "^[0-9]+ \Q$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]+) .+$/\1/')
((HIST_COUNT++))
# delete line, to add updated later
HIST_FILE_CONTENT=$(echo "$HIST_FILE_CONTENT" | \
grep --invert-match -Pe "^[0-9]+ \Q$COMMAND_STR\E$")
fi
# update history
update_line="${HIST_COUNT} ${COMMAND_STR}"
echo -e "${update_line}\n${HIST_FILE_CONTENT}" | \
sort --numeric-sort --reverse > "$HIST_FILE"
command='echo "nope"'
case $(echo "$COMMAND_STR" | awk -F'|' '{print $2}') in
desktop)
file=$(echo "$COMMAND_STR" | awk -F '|' '{print $1}')
command=$(cat $file | grep Exec | awk -F'=' '{print $2}')
;;
command)
command=$(echo "$COMMAND_STR" | awk -F '|' '{print $1}')
;;
esac
swaymsg -t command exec "$command"
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