1 files changed, 124 insertions, 0 deletions
diff --git a/pkgs/build-support/dlang/builddubpackage/default.nix b/pkgs/build-support/dlang/builddubpackage/default.nix
new file mode 100644
index 0000000000000..9295445b0f7c7
--- /dev/null
+++ b/pkgs/build-support/dlang/builddubpackage/default.nix
@@ -0,0 +1,124 @@
+{
+  lib,
+  stdenv,
+  fetchurl,
+  linkFarm,
+  dub,
+  ldc,
+  removeReferencesTo,
+}:
+
+# See https://nixos.org/manual/nixpkgs/unstable#dlang for more detailed usage information
+
+{
+  # A lockfile generated by `dub-to-nix` from the source of the package.
+  # Can be either a path to the file, or an attrset already parsed with `lib.importJSON`.
+  dubLock,
+  # The build type to pass to `dub build` as a value for the `--build=` flag.
+  dubBuildType ? "release",
+  # The flags to pass to `dub build` and `dub test`.
+  dubFlags ? [ ],
+  # The flags to pass to `dub build`.
+  dubBuildFlags ? [ ],
+  # The flags to pass to `dub test`.
+  dubTestFlags ? [ ],
+  # The D compiler to be used by `dub`.
+  compiler ? ldc,
+  ...
+}@args:
+
+let
+  makeDubDep =
+    {
+      pname,
+      version,
+      sha256,
+    }:
+    {
+      inherit pname version;
+      src = fetchurl {
+        name = "dub-${pname}-${version}.zip";
+        url = "mirror://dub/${pname}/${version}.zip";
+        inherit sha256;
+      };
+    };
+
+  lockJson = if lib.isPath dubLock then lib.importJSON dubLock else dubLock;
+
+  lockedDeps = lib.mapAttrsToList (
+    pname: { version, sha256 }: makeDubDep { inherit pname version sha256; }
+  ) lockJson.dependencies;
+
+  # a directory with multiple single element registries
+  # one big directory with all .zip files leads to version parsing errors
+  # when the name of a package is a prefix of the name of another package
+  dubRegistryBase = linkFarm "dub-registry-base" (
+    map (dep: {
+      name = "${dep.pname}/${dep.pname}-${dep.version}.zip";
+      path = dep.src;
+    }) lockedDeps
+  );
+
+  combinedFlags = "--skip-registry=all --compiler=${lib.getExe compiler} ${toString dubFlags}";
+  combinedBuildFlags = "${combinedFlags} --build=${dubBuildType} ${toString dubBuildFlags}";
+  combinedTestFlags = "${combinedFlags} ${toString dubTestFlags}";
+in
+stdenv.mkDerivation (
+  builtins.removeAttrs args [ "dubLock" ]
+  // {
+    strictDeps = args.strictDeps or true;
+
+    nativeBuildInputs = args.nativeBuildInputs or [ ] ++ [
+      dub
+      compiler
+      removeReferencesTo
+    ];
+
+    configurePhase =
+      args.configurePhase or ''
+        runHook preConfigure
+
+        export DUB_HOME="$NIX_BUILD_TOP/.dub"
+        mkdir -p $DUB_HOME
+
+        # register dependencies
+        ${lib.concatMapStringsSep "\n" (dep: ''
+          dub fetch ${dep.pname}@${dep.version} --cache=user --skip-registry=standard --registry=file://${dubRegistryBase}/${dep.pname}
+        '') lockedDeps}
+
+        runHook postConfigure
+      '';
+
+    buildPhase =
+      args.buildPhase or ''
+        runHook preBuild
+
+        dub build ${combinedBuildFlags}
+
+        runHook postBuild
+      '';
+
+    doCheck = args.doCheck or false;
+
+    checkPhase =
+      args.checkPhase or ''
+        runHook preCheck
+
+        dub test ${combinedTestFlags}
+
+        runHook postCheck
+      '';
+
+    preFixup = ''
+      ${args.preFixup or ""}
+
+      find "$out" -type f -exec remove-references-to -t ${compiler} '{}' +
+    '';
+
+    disallowedReferences = [ compiler ];
+
+    meta = {
+      platforms = dub.meta.platforms;
+    } // args.meta or { };
+  }
+)