nix: fix nixosModule and build (#1979)

* lnbits/settings: get LNBITS_COMMIT from envvar if available

There is no other way of setting the git commit at runtime, for build systems like Nix that allow you to hermetically define envvars derived from the source that will be available reproducibly at runtime

* nix: update potree2nix and nixosModule

This is a general refactor that gets everything building and passing the vmTest again

* Update nix/modules/lnbits-service.nix

---------

Co-authored-by: Pavol Rusnak <pavol@rusnak.io>

flake.lock

@@ -1,12 +1,15 @@
 {
   "nodes": {
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1676283394,
-        "narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
         "type": "github"
       },
       "original": {
@@ -15,6 +18,27 @@
         "type": "github"
       }
     },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "poetry2nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1688870561,
+        "narHash": "sha256-4UYkifnPEw1nAzqqPOTL2MvWtm3sNGw1UTYTalkTcGY=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "165b1650b753316aa7f1787f3005a8d2da0f5301",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1678470307,
@@ -34,16 +58,17 @@
     "poetry2nix": {
       "inputs": {
         "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
         "nixpkgs": [
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1678513806,
-        "narHash": "sha256-bEto1lp9bIQ+DlJsXQyRxN5l6B/oy3Skb7DueYRJJBo=",
+        "lastModified": 1695386222,
+        "narHash": "sha256-5lgnhCCGW0NH5+m5iTED8u6NSSM/dbH9LBPvX0x0XXg=",
         "owner": "nix-community",
         "repo": "poetry2nix",
-        "rev": "bf239d53fafb53cf439a72b3a50e86dd6a3984a5",
+        "rev": "093383b3d7fdd36846a7d84e128ca11865800538",
         "type": "github"
       },
       "original": {
@@ -57,6 +82,21 @@
         "nixpkgs": "nixpkgs",
         "poetry2nix": "poetry2nix"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -28,13 +28,29 @@
       });
       overlays = {
         default = final: prev: {
-          ${projectName} = self.packages.${final.hostPlatform.system}.${projectName};
+          ${projectName} = self.packages.${prev.stdenv.hostPlatform.system}.${projectName};
         };
       };
       packages = forAllSystems (system: pkgs: {
         default = self.packages.${system}.${projectName};
         ${projectName} = pkgs.poetry2nix.mkPoetryApplication {
           projectDir = ./.;
+          meta.rev = self.dirtyRev or self.rev;
+          overrides = pkgs.poetry2nix.overrides.withDefaults (final: prev: {
+            ruff = prev.ruff.override { preferWheel = true; };
+            fastapi = prev.fastapi.overridePythonAttrs (old: {
+              postPatch = ''
+                substituteInPlace pyproject.toml \
+                  --replace '"Framework :: Pydantic",' "" \
+                  --replace '"Framework :: Pydantic :: 1",' ""
+              '';
+            });
+            bolt11 = prev.bolt11.overrideAttrs (old: {
+              nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [
+                prev.poetry
+              ];
+            });
+          });
         };
       });
       nixosModules = {

nix/modules/lnbits-service.nix

@@ -88,6 +88,8 @@ in
       after = [ "network-online.target" ];
       environment = {
         LNBITS_DATA_FOLDER = "${cfg.stateDir}";
+        LNBITS_EXTENSIONS_PATH = "${cfg.stateDir}/extensions";
+        LNBITS_PATH = "${cfg.package.src}";
       };
       serviceConfig = {
         User = cfg.user;

nix/tests/nixos-module/default.nix

@@ -1,5 +1,6 @@
 { pkgs, makeTest, inputs }:
 makeTest {
+  name = "lnbits-nixos-module";
   nodes = {
     client = { config, pkgs, ... }: {
       environment.systemPackages = [ pkgs.curl ];