removed mkbackup script, refactored all script files to use pkgs.writeShellApplication rather than pkgs.writeShellScriptBin

modules/home/scripts/commands/runbg.nix

@@ -1,22 +1,29 @@
 {
-  self,
   pkgs,
 }:
-pkgs.writeShellScriptBin "runbg" ''
-  #!/usr/bin/env bash
+pkgs.writeShellApplication {
+  name = "runbg";
+  runtimeInputs = with pkgs; [
+    coreutils   # Provides `basename`, `which`, etc.
+    bash        # Provides the Bash shell
+    util-linux  # Provides `tty`
+  ];
+  text = ''
+    #!/usr/bin/env bash
 
-  [ $# -eq 0 ] && {  # $# is number of args
-      echo "$(basename $0): missing command" >&2
-      exit 1
-  }
-  prog="$(which "$1")"  # see below
-  [ -z "$prog" ] && {
-      echo "$(basename $0): unknown command: $1" >&2
-      exit 1
-  }
-  shift  # remove $1, now $prog, from args
-  tty -s && exec </dev/null      # if stdin is a terminal, redirect from null
-  tty -s <&1 && exec >/dev/null  # if stdout is a terminal, redirect to null
-  tty -s <&2 && exec 2>&1        # stderr to stdout (which might not be null)
-  "$prog" "$@" &  # $@ is all args
-''
+    [ $# -eq 0 ] && {  # $# is number of args
+        echo "$(basename "$0"): missing command" >&2
+        exit 1
+    }
+    prog="$(which "$1")"  # see below
+    [ -z "$prog" ] && {
+        echo "$(basename "$0"): unknown command: $1" >&2
+        exit 1
+    }
+    shift  # remove $1, now $prog, from args
+    tty -s && exec </dev/null      # if stdin is a terminal, redirect from null
+    tty -s <&1 && exec >/dev/null  # if stdout is a terminal, redirect to null
+    tty -s <&2 && exec 2>&1        # stderr to stdout (which might not be null)
+    "$prog" "$@" &  # $@ is all args
+  '';
+}