add script to check that required dependencies are in PATH

README.md

@@ -1,7 +1,14 @@
 Lupan's config files
 ====================
 
-To reproduce my environment clone this repo into `~/dotfiles` and run
+To reproduce my environment clone this repo into `~/dotfiles` check
+that you have required programs in your PATH with
+
+```
+$ sh check_dependencies.sh
+```
+
+and run
 
 ```
 $ stow -v alacritty bspwm music shell tmux

check_dependencies.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+
+echo '# bspwm:'
+for CMD in \
+    alacritty \
+	bspc \
+	bspwm \
+	dmenu \
+	dmenu_run \
+	emacsclient \
+	pkill \
+	polybar \
+	polybar-msg \
+	sed \
+	setxkbmap \
+	slock \
+	sxhkd \
+	systemctl \
+	xargs \
+	xdo \
+	xmodmap \
+	xrandr \
+	xrdb \
+	xsetroot \
+	xsettingsd \
+	xtitle \
+	xss-lock; do
+    which "$CMD"
+done
+
+echo '\n# bspwm (optional):'
+for CMD in \
+    firefox \
+	mpc \
+	mpd \
+	pamixer \
+	sx \
+	thunderbird; do
+    which "$CMD"
+done
+
+echo '\n# shell:'
+for CMD in emacsclient zsh; do
+    which "$CMD"
+done