Look up and propagate ReScript version

analysis/src/Packages.ml

@@ -11,6 +11,22 @@ let makePathsForModule ~projectFilesAndPaths ~dependenciesFilesAndPaths =
          Hashtbl.replace pathsForModule modName paths);
   pathsForModule
 
+let getReScriptVersion () =
+  (* TODO: Include patch stuff when needed *)
+  let defaultVersion = (10, 1) in
+  try
+    let value = Sys.getenv "RESCRIPT_VERSION" in
+    let version =
+      match value |> String.split_on_char '.' with
+      | major :: minor :: _rest -> (
+        match (int_of_string_opt major, int_of_string_opt minor) with
+        | Some major, Some minor -> (major, minor)
+        | _ -> defaultVersion)
+      | _ -> defaultVersion
+    in
+    version
+  with Not_found -> defaultVersion
+
 let newBsPackage ~rootPath =
   let rescriptJson = Filename.concat rootPath "rescript.json" in
   let bsconfigJson = Filename.concat rootPath "bsconfig.json" in
@@ -27,9 +43,12 @@ let newBsPackage ~rootPath =
         | Some libBs ->
           Some
             (let namespace = FindFiles.getNamespace config in
+             let rescriptVersion = getReScriptVersion () in
              let uncurried =
                let ns = config |> Json.get "uncurried" in
-               Option.bind ns Json.bool
+               match (rescriptVersion, ns) with
+               | (major, _), None when major >= 11 -> Some true
+               | _, ns -> Option.bind ns Json.bool
              in
              let uncurried = uncurried = Some true in
              let sourceDirectories =
@@ -93,6 +112,7 @@ let newBsPackage ~rootPath =
                ("Opens from ReScript config file: "
                ^ (opens |> List.map pathToString |> String.concat " "));
              {
+               rescriptVersion;
                rootPath;
                projectFiles =
                  projectFilesAndPaths |> List.map fst |> FileSet.of_list;

analysis/src/SharedTypes.ml

@@ -493,6 +493,7 @@ type package = {
   builtInCompletionModules: builtInCompletionModules;
   opens: path list;
   uncurried: bool;
+  rescriptVersion: int * int;
 }
 
 let allFilesInPackage package =

server/src/utils.ts

@@ -136,6 +136,29 @@ export let formatCode = (
   }
 };
 
+let findReScriptVersion = (filePath: p.DocumentUri): string | undefined => {
+  let projectRoot = findProjectRootOfFile(filePath);
+  if (projectRoot == null) {
+    return undefined;
+  }
+
+  let rescriptBinary = lookup.findFilePathFromProjectRoot(
+    projectRoot,
+    path.join(c.nodeModulesBinDir, c.rescriptBinName)
+  );
+
+  if (rescriptBinary == null) {
+    return undefined;
+  }
+
+  try {
+    let version = childProcess.execSync(`${rescriptBinary} -v`);
+    return version.toString().trim();
+  } catch (e) {
+    return undefined;
+  }
+};
+
 export let runAnalysisAfterSanityCheck = (
   filePath: p.DocumentUri,
   args: Array<any>,
@@ -154,9 +177,14 @@ export let runAnalysisAfterSanityCheck = (
   if (projectRootPath == null && projectRequired) {
     return null;
   }
+  let rescriptVersion = findReScriptVersion(filePath);
   let options: childProcess.ExecFileSyncOptions = {
     cwd: projectRootPath || undefined,
     maxBuffer: Infinity,
+    env: {
+      ...process.env,
+      RESCRIPT_VERSION: rescriptVersion,
+    },
   };
   let stdout = childProcess.execFileSync(binaryPath, args, options);