Add release target in nix

default.nix

@@ -2,6 +2,7 @@
 
   pkgsAttrs ? (import ./nix/pkgs.nix),
   bootstrap ? null,
+  releaseName ? "debug",
 
 }: let
 
@@ -27,7 +28,7 @@ in rec {
     buildInputs = [ pkgs.git pkgs.go ];
 
     src = ./.;
-    inherit bootstrap;
+    inherit bootstrap releaseName;
     nixPkgsVersion = pkgsAttrs.version;
     nixPkgsRev = pkgsAttrs.rev;
     builtByUser = builtins.getEnv "USER";
@@ -44,6 +45,7 @@ in rec {
         echo "Built for host:  $hostName" >> "$versionFile"
       fi
 
+      echo "Release:         $releaseName" >> "$versionFile"
       echo "Build date:      $(date) ($(date +%s))" >> "$versionFile"
       echo "Built by:        $builtByUser" >> "$versionFile"
       echo "Git rev:         $(cd srcCp && git describe --always --long --dirty=' (dirty)')" >> "$versionFile"
@@ -95,24 +97,22 @@ in rec {
       source $stdenv/setup
       cp -rL "$src" cryptic-net
       chmod +w cryptic-net -R
-      mkdir $out
-      appimagetool cryptic-net "$out/cryptic-net"
+      appimagetool cryptic-net "$out"
     '';
   };
 
-  service = pkgs.writeText "cryptic-service" ''
-    [Unit]
-    Description=cryptic nebula
-    Requires=network.target
-    After=network.target
-
-    [Service]
-    Restart=always
-    RestartSec=1s
-    User=root
-    ExecStart=${appImage}/cryptic-net
-
-    [Install]
-    WantedBy=multi-user.target
-  '';
+  release = pkgs.stdenv.mkDerivation {
+    name = "cryptic-net-AppImage";
+    inherit appImage releaseName;
+
+    buildInputs = [ pkgs.coreutils ];
+
+    builder = builtins.toFile "build.sh" ''
+      source $stdenv/setup
+
+      mkdir -p "$out"
+      cp "$appImage" "$out"/cryptic-net-$releaseName-linux-amd64
+      (cd "$out" && sha256sum * > sha256.txt)
+    '';
+  };
 }