❄️ Add nix flake

flake.lock

@@ -0,0 +1,41 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1637156900,
+        "narHash": "sha256-nusyaSsL1RLyUEWufUUywDrGKMXw+4ugSSZ3ss8TSuw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "12fc0f19fefa9dff68bc3e0938b815ab8d89df90",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,21 @@
+{
+    description = "Samw's APC PDU MQTT bridge";
+
+    inputs.flake-utils.url = "github:numtide/flake-utils";
+
+    outputs = { self, nixpkgs, flake-utils }: 
+        flake-utils.lib.eachDefaultSystem (system:
+            let pkgs = import nixpkgs { inherit system; }; in
+            rec {
+                packages.apc2mqtt = pkgs.buildGoModule {
+                    name = "apc2mqtt";
+                    src = self;
+                    vendorSha256 = "sha256-GlRcuUNrsNnONigXut2xFx0kX+5k80Djn07c3UutCLU=";
+                    ldflags = ''
+                        -X main.version=${if self ? rev then self.rev else "dirty"}
+                    '';
+                };
+                defaultPackage = packages.apc2mqtt;
+            }
+        );
+}

main.go

@@ -14,6 +14,8 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
+var version = "unknown"
+
 // OIDs of interest.
 // snmptranslate -m PowerNet-MIB -Pu -Tso | less
 const (
@@ -200,6 +202,7 @@ func spawnTarget(target targetConfig, mqttClient mqtt.Client) {
 func main() {
 	var configpath = flag.String("conf", "config.toml", "Path to toml config file")
 	flag.Parse()
+	log.Infof("Starting version %s", version)
 	conf, err := parseConfig(*configpath)
 	check(err)