Added new host configuration for my GPD Pocket 2

Makefile

@@ -5,38 +5,44 @@ define IN_NIXSHELL
 	nix-shell shell.nix --command '$1'
 endef
 
-.PHONY: help test update switch-home switch-nixos remote-switch-nixos
-
 # This help command was adapted from https://github.com/tiiuae/sbomnix
 # https://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+.PHONY: help
 help: ## Show this help message
 	@grep -E '^[a-zA-Z_-]+:.*?##.*$$' $(MAKEFILE_LIST) | awk 'BEGIN { \
 	  FS = ":.*?## "; \
 	  printf "\033[1m%-30s\033[0m %s\n", "TARGET", "DESCRIPTION" \
 	} \
 	{ printf "\033[32m%-30s\033[0m %s\n", $$1, $$2 }'
 
+.PHONY: test
 test: ## Test flake outputs with "nix flake check"
 	$(call IN_NIXSHELL,nix flake check)
 
+.PHONY: update
 update: ## Update "flake.lock"
 	$(call IN_NIXSHELL,nix flake update)
 
+.PHONY: switch-home
 switch-home: ## Switch local home-manager config
 	$(call IN_NIXSHELL,home-manager switch --flake .)
 
+.PHONY: build-home
 build-home: ## Build local home-manager config
 	$(call IN_NIXSHELL,home-manager build --flake .)
 
+.PHONY: switch-nixos
 switch-nixos: ## Switch local NixOS config
 	$(call IN_NIXSHELL,sudo nixos-rebuild switch --flake .#)
 
+.PHONY: build-nixos
 build-nixos: ## Build local NixOS config
 	$(call IN_NIXSHELL,sudo nixos-rebuild dry-activate --flake .#)
 
 # Default to connecting to the hostname directly
 ADDR=$(HOST)
 
+.PHONY: remote-switch-nixos
 remote-switch-nixos: ## Switch a remote NixOS config (e.x. make remote-switch-nixos HOST="" USER="" ADDR="") ADDR defaults to HOST
 	@if [[ -z "$(HOST)" || -z "$(USER)" || -z "$(ADDR)" ]]; then \
   		echo 'one or more variables are undefined'; \
@@ -47,3 +53,9 @@ remote-switch-nixos: ## Switch a remote NixOS config (e.x. make remote-switch-ni
 
 	$(call IN_NIXSHELL,NIX_SSHOPTS=-t nixos-rebuild --flake ".#$(HOST)" \
 		--target-host "$(USER)@$(ADDR)" --use-remote-sudo switch)
+
+# Utility roles
+
+.PHONY: get-hosts
+list-hosts: ## List NixOS configuration names
+	@$(call IN_NIXSHELL,nix flake show --json 2>/dev/null | jq -r ".nixosConfigurations | keys | .[] | @text")