vscode-extensions.rust-analyzer: init at unstable-2020-03-09

pkgs/misc/vscode-extensions/rust-analyzer/default.nix

@@ -0,0 +1,50 @@
+# Update script: pkgs/development/tools/rust/rust-analyzer/update.sh
+{ lib, pkgs, stdenv, nodejs, vscode-utils, jq, rust-analyzer
+, setDefaultRaLspServerPath ? true
+}:
+
+let
+  pname = "rust-analyzer";
+  publisher = "matklad";
+
+  # Follow the unstable version of rust-analyzer, since the extension is not stable yet.
+  inherit (rust-analyzer) version;
+
+  vsix = (import ./node-composition.nix {
+    inherit pkgs nodejs;
+    inherit (stdenv.hostPlatform) system;
+  }).package.override {
+    src = "${rust-analyzer.src}/editors/code";
+    outputs = [ "vsix" "out" ];
+
+    postInstall = ''
+      npm run package
+      mkdir $vsix
+      cp ${pname}.vsix $vsix/${pname}.zip
+    '';
+  };
+
+in vscode-utils.buildVscodeExtension {
+  inherit version vsix;
+  name = "${pname}-${version}";
+  src = "${vsix}/${pname}.zip";
+  vscodeExtUniqueId = "${publisher}.${pname}";
+
+  nativeBuildInputs = lib.optional setDefaultRaLspServerPath jq;
+
+  postFixup = lib.optionalString setDefaultRaLspServerPath ''
+    package_json="$out/share/vscode/extensions/${publisher}.${pname}/package.json"
+    jq '.contributes.configuration.properties."rust-analyzer.serverPath".default = $s' \
+      --arg s "${rust-analyzer}/bin/rust-analyzer" \
+      $package_json >$package_json.new
+    mv $package_json.new $package_json
+  '';
+
+  meta = with lib; {
+    description = "An alternative rust language server to the RLS";
+    homepage = "https://github.com/rust-analyzer/rust-analyzer";
+    license = with licenses; [ mit asl20 ];
+    maintainers = with maintainers; [ oxalica ];
+    platforms = platforms.all;
+  };
+}