1 files changed, 130 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/services/misc/octoprint.nix b/nixpkgs/nixos/modules/services/misc/octoprint.nix
new file mode 100644
index 000000000000..8950010773cf
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/misc/octoprint.nix
@@ -0,0 +1,130 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.octoprint;
+
+  baseConfig = {
+    plugins.curalegacy.cura_engine = "${pkgs.curaengine_stable}/bin/CuraEngine";
+    server.host = cfg.host;
+    server.port = cfg.port;
+    webcam.ffmpeg = "${pkgs.ffmpeg.bin}/bin/ffmpeg";
+  };
+
+  fullConfig = recursiveUpdate cfg.extraConfig baseConfig;
+
+  cfgUpdate = pkgs.writeText "octoprint-config.yaml" (builtins.toJSON fullConfig);
+
+  pluginsEnv = pkgs.python.buildEnv.override {
+    extraLibs = cfg.plugins pkgs.octoprint-plugins;
+  };
+
+in
+{
+  ##### interface
+
+  options = {
+
+    services.octoprint = {
+
+      enable = mkEnableOption "OctoPrint, web interface for 3D printers";
+
+      host = mkOption {
+        type = types.str;
+        default = "0.0.0.0";
+        description = ''
+          Host to bind OctoPrint to.
+        '';
+      };
+
+      port = mkOption {
+        type = types.int;
+        default = 5000;
+        description = ''
+          Port to bind OctoPrint to.
+        '';
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "octoprint";
+        description = "User for the daemon.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "octoprint";
+        description = "Group for the daemon.";
+      };
+
+      stateDir = mkOption {
+        type = types.path;
+        default = "/var/lib/octoprint";
+        description = "State directory of the daemon.";
+      };
+
+      plugins = mkOption {
+        default = plugins: [];
+        defaultText = "plugins: []";
+        example = literalExample "plugins: [ m3d-fio ]";
+        description = "Additional plugins.";
+      };
+
+      extraConfig = mkOption {
+        type = types.attrs;
+        default = {};
+        description = "Extra options which are added to OctoPrint's YAML configuration file.";
+      };
+
+    };
+
+  };
+
+  ##### implementation
+
+  config = mkIf cfg.enable {
+
+    users.users = optionalAttrs (cfg.user == "octoprint") (singleton
+      { name = "octoprint";
+        group = cfg.group;
+        uid = config.ids.uids.octoprint;
+      });
+
+    users.groups = optionalAttrs (cfg.group == "octoprint") (singleton
+      { name = "octoprint";
+        gid = config.ids.gids.octoprint;
+      });
+
+    systemd.tmpfiles.rules = [
+      "d '${cfg.stateDir}' - ${cfg.user} ${cfg.group} - -"
+    ];
+
+    systemd.services.octoprint = {
+      description = "OctoPrint, web interface for 3D printers";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      path = [ pluginsEnv ];
+      environment.PYTHONPATH = makeSearchPathOutput "lib" pkgs.python.sitePackages [ pluginsEnv ];
+
+      preStart = ''
+        if [ -e "${cfg.stateDir}/config.yaml" ]; then
+          ${pkgs.yaml-merge}/bin/yaml-merge "${cfg.stateDir}/config.yaml" "${cfgUpdate}" > "${cfg.stateDir}/config.yaml.tmp"
+          mv "${cfg.stateDir}/config.yaml.tmp" "${cfg.stateDir}/config.yaml"
+        else
+          cp "${cfgUpdate}" "${cfg.stateDir}/config.yaml"
+          chmod 600 "${cfg.stateDir}/config.yaml"
+        fi
+      '';
+
+      serviceConfig = {
+        ExecStart = "${pkgs.octoprint}/bin/octoprint serve -b ${cfg.stateDir}";
+        User = cfg.user;
+        Group = cfg.group;
+      };
+    };
+
+  };
+
+}