Add pre- and post-install recipes for configurations

Use the post-install recipe for Emacs to configure it to open org-protocol
requests.

GNUmakefile

@@ -12,9 +12,15 @@ clean: $(addsuffix -clean,$(MODULES))
 zsh:
 	$(MAKE) -C $@
 
-%-install: %
+before-%-install:				# Dummy recipe
+	@true
+
+%-stow: % before-%-install
 	$(STOW) $<
 
+%-install: %-stow				# Dummy recipe
+	@true
+
 %-uninstall:
 	$(STOW) -D $(subst -uninstall,,$@)
 
@@ -32,6 +38,9 @@ picom-clean:
 # Emacs #
 #########
 
+emacs-install: emacs-stow
+	xdg-settings set default-url-scheme-handler org-protocol EmacsClient.desktop
+
 ###########
 # Xmodmap #
 ###########

emacs/.local/share/applications/EmacsClient.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Name=Emacs Client
+Exec=emacsclient %u
+Icon=emacs-icon
+Type=Application
+Terminal=false
+MimeType=x-scheme-hander/org-protocol;