ipfs: added defaultMode, added norouting service

nixos/modules/services/network-filesystems/ipfs.nix

@@ -49,6 +49,12 @@ in
         description = "The data dir for IPFS";
       };
 
+      defaultMode = mkOption {
+        description = "systemd service that is enabled by default";
+        type = types.enum [ "online" "offline" "norouting" ];
+        default = "online";
+      };
+
       autoMigrate = mkOption {
         type = types.bool;
         default = false;
@@ -147,10 +153,11 @@ in
     systemd.services.ipfs = {
       description = "IPFS Daemon";
 
-      wantedBy = [ "multi-user.target" ];
+      wantedBy = mkIf (cfg.defaultMode == "online") [ "multi-user.target" ];
+
       after = [ "network.target" "local-fs.target" "ipfs-init.service" ];
 
-      conflicts = [ "ipfs-offline.service" ];
+      conflicts = [ "ipfs-offline.service" "ipfs-norouting.service"];
       wants = [ "ipfs-init.service" ];
 
       environment.IPFS_PATH = cfg.dataDir;
@@ -169,9 +176,11 @@ in
     systemd.services.ipfs-offline = {
       description = "IPFS Daemon (offline mode)";
 
+      wantedBy = mkIf (cfg.defaultMode == "offline") [ "multi-user.target" ];
+
       after = [ "local-fs.target" "ipfs-init.service" ];
 
-      conflicts = [ "ipfs.service" ];
+      conflicts = [ "ipfs.service" "ipfs-norouting.service"];
       wants = [ "ipfs-init.service" ];
 
       environment.IPFS_PATH = cfg.dataDir;
@@ -186,5 +195,29 @@ in
         RestartSec = 1;
       };
     };
+
+    systemd.services.ipfs-norouting = {
+      description = "IPFS Daemon (no routing mode)";
+
+      wantedBy = mkIf (cfg.defaultMode == "norouting") [ "multi-user.target" ];
+
+      after = [ "local-fs.target" "ipfs-init.service" ];
+
+      conflicts = [ "ipfs.service" "ipfs-offline.service"];
+      wants = [ "ipfs-init.service" ];
+
+      environment.IPFS_PATH = cfg.dataDir;
+
+      path  = [ pkgs.ipfs ];
+
+      serviceConfig = {
+        ExecStart = "${ipfs}/bin/ipfs daemon ${ipfsFlags} --routing=none";
+        User = cfg.user;
+        Group = cfg.group;
+        Restart = "on-failure";
+        RestartSec = 1;
+      };
+    };
+
   };
 }