add sway-launcher

sway/sway-launcher

@@ -0,0 +1,58 @@
+#!/bin/sh
+# terminal application launcher for sway, using fzf
+# original command:
+# Based on: https://github.com/swaywm/sway/issues/1367 
+# bindsym $altkey+space exec termite --name=launcher -e \
+#    "bash -c 'compgen -c | sort -u | fzf --no-extended --print-query | \
+#    tail -n1 | xargs -r swaymsg -t command exec'"
+
+HIST_FILE="$HOME/.cache/sway-launcher-history.txt"
+
+# Get shell command list
+command_list=$(compgen -c | sort -u)
+
+# read existing command history
+if [ -f "$HIST_FILE" ]; then
+    command_history=$(cat "$HIST_FILE")
+else
+    command_history=""
+fi
+
+# search command list
+command_str=$(echo -e "${command_history}\n${command_list}" | \
+    sed -E 's/^[0-9]+ (.+)$/\1/' | \
+    fzf --no-extended --print-query --no-sort | \
+    tail -n1) || exit 1
+
+if [ "$command_str" == "" ]; then
+    exit 1
+fi
+# echo "Command: $command_str"
+
+# get full line from history (with count number)
+hist_line=$(echo "$command_history" | grep --fixed-strings "$command_str")
+# 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
+    # echo "Hist Before: $command_history"
+    command_history=$(echo "$command_history" | \
+	grep --fixed-strings --invert-match "$command_str")
+    # echo "Hist After: $command_history"
+fi
+
+# update history
+update_line="${hist_count} ${command_str}"
+echo -e "${update_line}\n${command_history}" | \
+    sort --numeric-sort --reverse > "$HIST_FILE"
+# echo "$update_line"
+
+# execute command
+echo "$command_str"
+swaymsg -t command exec "$command_str"
+