feat: build backend with Nix

.gitignore

@@ -31,3 +31,6 @@ dist
 
 ## Node dependencies
 node_modules
+
+# Nix
+result

backend/nix/package.nix

@@ -0,0 +1,55 @@
+{
+  rust-overlay,
+  inputs,
+  system,
+  ...
+}: let
+  rust = import ./rust-version.nix { inherit rust-overlay inputs system; };
+  pkgs = rust.pkgs;
+  rustPlatform = pkgs.makeRustPlatform {
+    cargo = rust.version;
+    rustc = rust.version;
+  };
+  cargoToml = builtins.fromTOML (builtins.readFile ../Cargo.toml);
+  name = cargoToml.package.name;
+  version = cargoToml.package.version;
+  rustBuild = rustPlatform.buildRustPackage {
+    pname = name;
+    inherit version;
+    src = ../.;
+    cargoLock.lockFile = ../Cargo.lock;
+  };
+  makeDockerImage = tag:
+    pkgs.dockerTools.buildLayeredImage {
+      name = "phundrak/${name}";
+      inherit tag;
+      created = "now";
+      config = {
+        Entrypoint = ["${rustBuild}/bin/${name}"];
+        Env = [
+          "SSL_CERT_FILE=${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"
+        ];
+        ExposedPorts = {
+          "3100/tcp" = {};
+        };
+        Labels = {
+          "org.opencontainers.image.title" = name;
+          "org.opencontainers.image.version" = version;
+          "org.opencontainers.image.description" = "REST API backend for phundrak.com";
+          "org.opencontainers.image.authors" = "Lucien Cartier-Tilet <lucien@phundrak.com>";
+          "org.opencontainers.image.licenses" = "AGPL-3.0-only";
+          "org.opencontainers.image.source" = "https://labs.phundrak.com/phundrak/phundrak.com";
+          "org.opencontainers.image.url" = "https://labs.phundrak.com/phundrak/phundrak.com";
+          "org.opencontainers.image.documentation" = "https://labs.phundrak.com/phundrak/phundrak.com";
+          "org.opencontainers.image.vendor" = "Phundrak";
+        };
+      };
+      contents = [rustBuild pkgs.cacert];
+    };
+  dockerImageLatest = makeDockerImage "latest";
+  dockerImageVersioned = makeDockerImage version;
+in {
+  backend = rustBuild;
+  backendDocker = dockerImageVersioned;
+  backendDockerLatest = dockerImageLatest;
+}

backend/nix/rust-version.nix

@@ -0,0 +1,6 @@
+{rust-overlay, inputs, system, ...}: let
+overlays = [(import rust-overlay)];
+in rec {
+  pkgs = import inputs.nixpkgs {inherit system overlays;};
+  version = pkgs.rust-bin.stable.latest.default;
+}

backend/nix/shell.nix

@@ -6,9 +6,7 @@
   rust-overlay,
   ...
 }: let
-  overlays = [(import rust-overlay)];
-  rustPkgs = import inputs.nixpkgs {inherit system overlays;};
-  rustVersion = rustPkgs.rust-bin.stable.latest.default;
+  rustPlatform = import ./rust-version.nix { inherit rust-overlay inputs system; };
 in
   inputs.devenv.lib.mkShell {
     inherit inputs pkgs;
@@ -20,8 +18,8 @@ in
           pkgs.lib.mkIf (devenvRootFileContent != "") devenvRootFileContent;
       }
       {
-        packages = with rustPkgs; [
-          (rustVersion.override {
+        packages = with rustPlatform.pkgs; [
+          (rustPlatform.version.override {
             extensions = [
               "clippy"
               "rust-src"

flake.nix

@@ -33,12 +33,12 @@
     forEachSystem = nixpkgs.lib.genAttrs (import systems);
   in {
     formatter = forEachSystem (system: alejandra.defaultPackage.${system});
-
+    packages = forEachSystem (system: import ./backend/nix/package.nix { inherit rust-overlay inputs system; });
     devShells = forEachSystem (
       system: let
         pkgs = nixpkgs.legacyPackages.${system};
       in {
-        backend = import ./backend/shell.nix {
+        backend = import ./backend/nix/shell.nix {
           inherit inputs pkgs system self rust-overlay;
         };
         frontend = import ./frontend/shell.nix {