fix: add package build and fix disko

Makefile

@@ -0,0 +1,15 @@
+PREFIX ?= /usr/local
+SHARE ?= $(PREFIX)/share/disko
+
+all:
+
+SOURCES = disko cli.nix default.nix types.nix
+
+install:
+	mkdir -p $(PREFIX)/bin $(SHARE)
+	sed \
+		-e "s|libexec_dir=\".*\"|libexec_dir=\"$(SHARE)\"|" \
+		-e "s|#!/usr/bin/env.*|#!/usr/bin/env bash|" \
+		disko > $(PREFIX)/bin/disko
+	chmod 755 $(PREFIX)/bin/disko
+	cp -r $(SOURCES) $(SHARE)

disko

@@ -1,9 +1,11 @@
 #!/usr/bin/env bash
 set -euo pipefail
-set -x
 
 readonly libexec_dir="${0%/*}"
 
+# a file with the disko config
+declare disko_config
+
 # mount was chosen as the default mode because it's less destructive
 mode=mount
 nix_args=()
@@ -30,6 +32,11 @@ abort() {
 
 ## Main ##
 
+[[ $# -eq 0 ]] && {
+  showUsage
+  exit 1
+}
+
 while [[ $# -gt 0 ]]; do
   case "$1" in
     -m | --mode)
@@ -46,10 +53,11 @@ while [[ $# -gt 0 ]]; do
       exit 0
       ;;
     *)
-      if [ -z ${disko_config+x} ] && [ -e $1 ]; then
+      if [ -z ${disko_config+x} ] && [ -e "$1" ]; then
         disko_config=$1
       else
         showUsage
+        exit 1
       fi
       ;;
   esac

flake.nix

@@ -8,6 +8,15 @@
     lib = import ./. {
       inherit (nixpkgs) lib;
     };
+    packages.x86_64-linux.disko = let
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+    in pkgs.stdenv.mkDerivation {
+      name = "disko";
+      src = ./.;
+      meta.description = "Format disks with nix-config";
+      installFlags = [ "PREFIX=$(out)" ];
+    };
+    packages.x86_64-linux.default = self.packages.x86_64-linux.disko;
     checks.x86_64-linux = let
       pkgs = nixpkgs.legacyPackages.x86_64-linux;
     in