Add some helper functions

herbstluftwm/.config/herbstluftwm/autostart

@@ -1,9 +1,28 @@
-#!/usr/bin/env zsh
+#!/usr/bin/env bash
 
-# this is a simple config for herbstluftwm
+## Helper functions:
 
-hc() {
-    herbstclient "$@"
+# This simple function saves a lot of keystrokes when editing this
+# configuration. Instead of typing "herbstluftwm" everywhere, I can
+# just type "hc". This is part of the default configuration.
+function hc() { herbstclient "$@" }
+
+# This function picks a random wallpaper from a list collection.
+function random-wallpaper() {
+    find ~/pictures/wallpapers -type f \
+         -wholename '*/3840x1080/*' -o -wholename '*/patterns/*' \
+        | shuf -n 1
+}
+
+# This function adds an attribute to a herbstluftwm tag that tells it
+# which monitor it should appear on, in case I care. Usually I want
+# Emacs and my terminal to always appear on my primary monitor, and
+# Conkeror/Firefox on my secondary, I don't like it when they get
+# switched.
+function lock-tag-to-monitor() {
+    herbstclient chain \
+                 , new_attr string tags.by-name."$1".my-monitor \
+                 , set_attr tags.by-name."$1".my-monitor "$2"
 }
 
 hc emit_hook reload
@@ -155,7 +174,6 @@ hc unlock
 
 herbstclient set tree_style '╾│ ├└╼─┐'
 
-# do multi monitor setup here, e.g.:
-# hc set_monitors 1280x1024+0+0 1280x1024+1280+0
-# or simply:
-# hc detect_monitors
+## Monitors
+# I have two monitors, each with a resolution of 1920x1080.
+hc set_monitors 1920x1080+0+0 1920x1080+1920+0