feat(Nix): change build paths and add Docker images

flake.nix

@@ -47,22 +47,21 @@
             triple = "aarch64-unknown-linux-gnu";
           };
         };
-        mkRustBuild = import ./nix/backend.nix;
+        rustBuilds = import ./nix/backend.nix;
         packages = {
-          linux-x86_64 = mkRustBuild targets.linux-x86_64;
-          linux-aarch64 = mkRustBuild targets.linux-aarch64;
+          x86_64 = rustBuilds targets.linux-x86_64;
+          aarch64 = rustBuilds targets.linux-aarch64;
         };
         defaultBySystem = {
-          "x86_64-linux" = packages.linux-x86_64;
-          "aarch64-linux" = packages.linux-aarch64;
+          x86_64-linux = packages.x86_64;
+          aarch64-linux = packages.aarch64;
         };
       in {
         formatter = alejandra.defaultPackage.${system};
-        packages.backend =
-          packages
-          // {
-            default = defaultBySystem.${system} or packages.linux-x86_64;
-          };
+        packages = {
+          backend = packages;
+          default = defaultBySystem.${system}.backend or packages.x86_64.backend;
+        };
         devShell = import ./nix/shell.nix {inherit pkgs rustVersion;};
       }
     );

nix/backend.nix

@@ -1,19 +1,5 @@
 target: let
-  cargoToml = fromTOML (builtins.readFile ../backend/Cargo.toml);
-  inherit (cargoToml.package) name version;
   pkgs = target.crossPkgs;
-  buildArgs = {
-    pname = name;
-    inherit version;
-    src = pkgs.lib.cleanSource ../.;
-    # cargoLock.lockFile = ../Cargo.lock;
-    cargoVendorDir = "vendor";
-    useNextest = true;
-    meta = {
-      inherit (cargoToml.package) description homepage;
-    };
-    postBuild = "${pkgs.upx}/bin/upx target/*/release/*${name}";
-  };
   rustVersion = pkgs.rust-bin.stable.latest.default.override {
     targets = [target.triple];
   };
@@ -21,5 +7,58 @@ target: let
     cargo = rustVersion;
     rustc = rustVersion;
   };
-in
-  rustPlatform.buildRustPackage buildArgs
+  cargoToml = fromTOML (builtins.readFile ../backend/Cargo.toml);
+  inherit (cargoToml.package) name version;
+  rustBuild = rustPlatform.buildRustPackage {
+    pname = name;
+    inherit version;
+    src = pkgs.lib.cleanSource ../.;
+    cargoLock.lockFile = ../Cargo.lock;
+    # cargoVendorDir = "vendor";
+    useNextest = true;
+    meta = {
+      inherit (cargoToml.package) description homepage;
+    };
+  };
+  settingsDir = pkgs.runCommand "settings" {} ''
+    mkdir -p $out/settings
+    cp ${../backend/settings}/*.yaml $out/settings/
+  '';
+  makeDockerImage = tag:
+    pkgs.dockerTools.buildLayeredImage {
+      name = "phundrak/${name}";
+      contents = [rustBuild pkgs.cacert settingsDir];
+      config = {
+        name = "phundrak/${name}";
+        inherit tag;
+        created = "now";
+      };
+      config = {
+        Entrypoint = ["${rustBuild}/bin/${name}"];
+        WorkingDir = "/";
+        Env = [
+          "SSL_CERT_FILE=${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 STA";
+          "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/sta";
+          "org.opencontainers.image.url" = "https://labs.phundrak.com/phundrak/sta";
+          "org.opencontainers.image.documentation" = "https://labs.phundrak.com/phundrak/sta";
+          "org.opencontainers.image.vendor" = "Phundrak";
+        };
+      };
+    };
+in {
+  backend = rustBuild;
+  docker = {
+    default = makeDockerImage version;
+    latest = makeDockerImage "latest";
+  };
+}