Add eww bar

This configuration was simply copied from my old Arch Linux system.
There are some issues that still need to be solved, namely with fonts
and missing bitcoin price script, but it's mostly minor.

home/programs/graphical/bars/eww/config/scripts/gammarelay

@@ -0,0 +1,82 @@
+#!/bin/env bash
+
+if [ "$1" = "temperature" ]; then
+    watch_cmd="{t}"
+    update_cmd="UpdateTemperature"
+    update_signature="n"
+    set_cmd="Temperature"
+    set_signature="q"
+    default_val=6500
+    click_val=4500
+    scroll_change=100
+    cmp_op="<"
+
+elif [ "$1" = "brightness" ]; then
+    watch_cmd="{bp}"
+    update_cmd="UpdateBrightness"
+    update_signature="d"
+    set_cmd="Brightness"
+    set_signature="d"
+    default_val=1
+    click_val=0.8
+    scroll_change=0.02
+    cmp_op="<"
+
+elif [ "$1" = "gamma" ]; then
+    watch_cmd="{g}"
+    update_cmd="UpdateGamma"
+    update_signature="d"
+    set_cmd="Gamma"
+    set_signature="d"
+    default_val=1
+    click_val=1.1
+    scroll_change=0.02
+    cmp_op=">"
+
+else
+    >&2 echo "Invalid option, first argument must be one of: temperature, brightness, gamma"
+    exit 1
+fi
+
+if [ "$2" = "watch" ]; then
+    exec wl-gammarelay-rs watch "$watch_cmd"
+
+elif [ "$2" = "get" ]; then
+    exec busctl --user get-property rs.wl-gammarelay / rs.wl.gammarelay "$set_cmd" | cut -d' ' -f2
+
+elif [ "$2" = "scroll" ]; then
+    if [ "$3" = "up" ]; then
+        sign="+"
+    elif [ "$3" = "down" ]; then
+        sign="-"
+    else
+        >&2 echo "Invalid sign, second argument must be one of: up, down"
+        exit 1
+    fi
+
+    exec busctl --user -- call rs.wl-gammarelay / rs.wl.gammarelay "$update_cmd" "$update_signature" ${sign}${scroll_change}
+
+elif [ "$2" = "set" ]; then
+    mode="$3"
+    if [ "$mode" = "toggle" ]; then
+        cur_val="$(busctl --user get-property rs.wl-gammarelay / rs.wl.gammarelay "$set_cmd" | cut -d' ' -f2)"
+        if [ "$(echo "$cur_val $cmp_op $default_val" | bc -l)" = "1" ]; then
+            mode="off"
+        else
+            mode="on"
+        fi
+    fi
+
+    if [ "$mode" = "on" ]; then
+        exec busctl --user -- set-property rs.wl-gammarelay / rs.wl.gammarelay "$set_cmd" "$set_signature" "$click_val"
+    elif [ "$mode" = "off" ]; then
+        exec busctl --user -- set-property rs.wl-gammarelay / rs.wl.gammarelay "$set_cmd" "$set_signature" "$default_val"
+    else
+        >&2 echo "Invalid mode, third argument, must be one of: toggle, on, off"
+        exit 1
+    fi
+
+else
+    >&2 echo "Invalid operation, second argument must be one of: watch, scroll, set"
+    exit 1
+fi