Prevent overwrite of config on multiple installs.

* Fixes #4.
* Install now creates a docs location with the latest default example config.
* /etc/wireguard-initramfs/config is not modified if it exists.

Makefile

@@ -2,6 +2,7 @@
 
 TARGETDIR = /etc/wireguard-initramfs
 INITRAMFS = /etc/initramfs-tools
+DOCSDIR   = /usr/local/share/docs/wireguard-initramfs
 
 help:
 	@echo "USAGE:"
@@ -13,6 +14,8 @@ help:
 	@echo "        Remove wireguard-initramfs from initramfs, leaves "
 	@echo "        $(TARGETDIR). Does not need to be installed."
 	@echo
+	@echo "Example configuration located at: $(DOCSDIR)"
+	@echo
 
 .PHONY: help Makefile
 
@@ -23,14 +26,18 @@ install: remove_legacy
 	@mkdir -p "$(TARGETDIR)"
 	@touch "$(TARGETDIR)/private_key"
 	@chmod 0600 "$(TARGETDIR)/private_key"
-	@cp -v config "$(TARGETDIR)/config"
+	@cp -vn config "$(TARGETDIR)/config"
 	@chmod 0644 "$(TARGETDIR)/config"
 	@cp -v hooks "$(INITRAMFS)/hooks/wireguard"
 	@chmod 0755 hooks "$(INITRAMFS)/hooks/wireguard"
 	@cp -v init-premount "$(INITRAMFS)/scripts/init-premount/wireguard"
 	@chmod 0755 init-premount "$(INITRAMFS)/scripts/init-premount/wireguard"
 	@cp -v init-bottom "$(INITRAMFS)/scripts/init-bottom/wireguard"
 	@chmod 0755 init-bottom "$(INITRAMFS)/scripts/init-bottom/wireguard"
+	-@mkdir -p "$(DOCSDIR)/examples"
+	@chmod -R 0755 "$(DOCSDIR)"
+	@cp -v config "$(DOCSDIR)/examples/config"
+	@chmod 0644 "$(DOCSDIR)/examples/config"
 	@echo "Done."
 	@echo
 	@echo "Setup $(TARGETDIR)/config and run:"
@@ -45,6 +52,7 @@ uninstall: remove_legacy
 	@rm -f "$(INITRAMFS)/hooks/wireguard"
 	@rm -f "$(INITRAMFS)/scripts/init-premount/wireguard"
 	@rm -f "$(INITRAMFS)/scripts/init-bottom/wireguard"
+	@rm -rf "$(DOCSDIR)"
 	@echo
 	@echo "Done."
 

config

@@ -4,7 +4,7 @@
 #       and compromised/untrusted. Boot wireguard network should be
 #       **different** & untrusted; versus the network used after booting.
 #       Always restrict ports and access on the wireguard server.
-#       
+#
 # Be sure to test wireguard config with a running system before setting
 # options. See: https://manpages.debian.org/unstable/wireguard-tools/wg.8.en.html
 #