Major rewrite: switching back to Arch from NixOS

root/usr/local/bin/btrfs-backup

@@ -208,7 +208,7 @@ argsp_cmdline() {
     fi
   fi
 
-  if [ "${ret_val[keep]}" -eq 0 ] && [ "${ret_val[skip_create]}" -eq 0 ]; then
+  if [ -n "${ret_val[keep]}" ] && [ "${ret_val[keep]}" -eq 0 ] && [ "${ret_val[skip_create]}" -eq 0 ]; then
     echo "Using --keep=0 doesn't make sense without --skip-create." >&2
     echo "It would delete the new snapshot you wanted to create." >&2
     argsp_cmdline_exit="$ERR_CODE_INVALID_ARG"

root/usr/local/bin/greetd-session-wrapper

@@ -0,0 +1,17 @@
+#!/bin/bash
+set -euo pipefail
+
+# This is a helper wrapper script for greetd.
+#
+# It will run the session / application using the appropriate shell configured for
+# this user. That way, we can make sure all of the environment variables are set
+# before the WM/DE session is started.
+#
+# This is very important, as without it, variables for things like qt theme
+# will not be set, and applications executed by the WM/DE will not be themed properly.
+
+script_name="$0"
+shell="$(getent passwd "$USER" | awk -F: '{print $NF}')"
+command=("$@")
+
+exec "$shell" -c 'exec "$@"' "$script_name" "${command[@]}"

root/usr/local/bin/numlock

@@ -0,0 +1,5 @@
+#!/bin/bash
+for tty in /dev/tty[0-9]; do
+  /usr/bin/setleds -D +num < "$tty"
+done
+

root/usr/local/bin/power-profiles-monitor

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ "$EUID" -ne 0 ]; then
+  echo "You must run this script as root"
+  exit 1
+fi
+
+BAT=$(echo /sys/class/power_supply/BAT*) # only supports single-battery systems
+BAT_STATUS="$BAT/status"
+BAT_CAP="$BAT/capacity"
+OVERRIDE_FLAG="/tmp/power-monitor-override"
+
+POWER_SAVE_PERCENT=50 # Enter power-save mode if on bat and below this capacity
+
+HAS_PERFORMANCE="$(powerprofilesctl list | grep "performance" || true)" # the || true ignores grep failing with non-zero code
+
+# monitor loop
+prev=0
+while true; do
+  # check if override is set
+  if [ -f "$OVERRIDE_FLAG" ]; then
+    echo "Override flag set, waiting for release"
+    inotifywait -qq "$OVERRIDE_FLAG"
+    continue
+  fi
+
+  # read the current state
+  status="$(cat "$BAT_STATUS")"
+  capacity="$(cat "$BAT_CAP")"
+
+  if [[ $status == "Discharging" ]]; then
+    if [[ $capacity -le $POWER_SAVE_PERCENT ]]; then
+      profile="power-saver"
+    else
+      profile="balanced"
+    fi
+  else
+    if [[ -n $HAS_PERFORMANCE ]]; then
+      profile="performance"
+    else
+      profile="balanced"
+    fi
+  fi
+
+  # Set the new profile
+  if [[ "$profile" != "$prev" ]]; then
+    echo -en "Setting power profile to ${profile}\n"
+    powerprofilesctl set $profile
+    prev=$profile
+  fi
+
+  # wait for changes in status or capacity files
+  # i.e. for the next power change event
+  inotifywait -qq "$BAT_STATUS" "$BAT_CAP"
+done