flake: added package

Author: lromor

flake.nix

@@ -6,17 +6,19 @@
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = { self, nixpkgs, flake-utils } @inputs:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs {
           inherit system;
         };
+        common = with pkgs; {
+          bazel = bazel_7;
+          jdk = jdk;
+        };
       in {
         devShells.default =
           let
-            bazel = pkgs.bazel_7;
-
             # There is too much volatility between even micro-versions of
             # newer clang-format. Use slightly older version for now.
             clang_for_formatting = pkgs.llvmPackages_17.clang-tools;
@@ -26,8 +28,8 @@
           in with pkgs; pkgs.mkShell{
             packages = with pkgs; [
               git
-              bazel
-              jdk
+              common.bazel
+              common.jdk
               bash
               gdb
 
@@ -51,7 +53,95 @@
 
             CLANG_TIDY="${clang_for_tidy}/bin/clang-tidy";
             CLANG_FORMAT="${clang_for_formatting}/bin/clang-format";
+
+            shellHook = ''
+              exec bash
+            '';
           };
+
+        # Package fpga-assembler.
+        packages.default = (pkgs.callPackage (
+          {
+            buildBazelPackage,
+            stdenv,
+            fetchFromGitHub,
+            lib,
+            nix-gitignore,
+          }:
+          let
+            system = stdenv.hostPlatform.system;
+            registry = fetchFromGitHub {
+              owner = "bazelbuild";
+              repo = "bazel-central-registry";
+              rev = "63f3af762b2fdd7acaa7987856cd3ac314eaea09";
+              hash = "sha256-ugNzoP0gdrhl9vH1TRdwoevuTsSqjitXnAoMSSTlCgI=";
+            };
+          in
+            buildBazelPackage {
+              pname = "fpga-as";
+
+              version = "0.0.1";
+
+              src = nix-gitignore.gitignoreSourcePure [] ./.;
+
+              bazelFlags = [
+                "--registry"
+                "file://${registry}"
+              ];
+
+              postPatch = ''
+                patchShebangs scripts/create-workspace-status.sh
+              '';
+
+              fetchAttrs = {
+                hash =
+                  {
+                    aarch64-linux = "sha256-E4VHjDa0qkHmKUNpTBfJi7dhMLcd1z5he+p31/XvUl8=";
+                    x86_64-linux = "sha256-hVBJB0Hsd9sXuEoNcjhTkbPl89vlZT1w39JppCD+n8Y=";
+                  }
+                    .${system} or (throw "No hash for system: ${system}");
+              };
+
+              removeRulesCC = false;
+              removeLocalConfigCc = false;
+              removeLocalConfigSh = false;
+
+              nativeBuildInputs = [
+                common.jdk
+                pkgs.git
+                pkgs.bash
+                # Convenient tool to enter into the sandbox and start debugging.
+                pkgs.breakpointHook
+              ];
+
+              bazel = common.bazel;
+
+              bazelBuildFlags = [ "-c opt" ];
+              bazelTestTargets = [ "//..." ];
+              bazelTargets = [ "//fpga:fpga-as" ];
+
+              buildAttrs = {
+                installPhase = ''
+                  install -D --strip bazel-bin/fpga/fpga-as "$out/bin/fpga-as"
+                '';
+              };
+
+              meta = {
+                description = "Tool to convert FASM to FPGA bitstream.";
+                homepage = "https://github.com/lromor/fpga-assembler";
+                license = lib.licenses.asl20;
+                platforms = lib.platforms.linux;
+              };
+            }
+        ) {}).overrideAttrs (final: prev: {
+          # Fixup the deps so they always contain correrct
+          # shebangs paths pointing to the store.
+          deps = prev.deps.overrideAttrs (final: prev: {
+            installPhase = ''
+              patchShebangs $bazelOut/external
+            '' + prev.installPhase;
+          });
+        });
       }
     );
 }

fpga/BUILD

@@ -9,7 +9,9 @@ package(
 license(
     name = "license",
     package_name = "fpga",
-    license_kind = "@rules_license//licenses/spdx:Apache-2.0",
+    license_kinds = [
+        "@rules_license//licenses/spdx:Apache-2.0",
+    ],
 )
 
 cc_library(

fpga/xilinx/BUILD

@@ -9,7 +9,9 @@ package(
 license(
     name = "license",
     package_name = "xilinx",
-    license_kind = "@rules_license//licenses/spdx:ISC",
+    license_kinds = [
+        "@rules_license//licenses/spdx:ISC"
+    ],
 )
 
 cc_library(