improvement: Restore adding properties and env when fetching metals

packages/metals-languageclient/src/fetchMetals.ts

@@ -21,7 +21,7 @@ interface PackedChildPromise {
 export async function fetchMetals({
  serverVersion,
  serverProperties,
- javaConfig: { coursier, javaPath },
+ javaConfig: { javaOptions, coursier, extraEnv, javaPath },
  outputChannel,
 }: FetchMetalsOptions): Promise<PackedChildPromise> {
  const serverDependency = calcServerDependency(serverVersion);
@@ -53,17 +53,35 @@ export async function fetchMetals({
  "-p",
  ];
 
+ const environment = {
+ env: {
+ ...process.env,
+ ...extraEnv,
+ },
+ };
+
  if (coursier.endsWith(".jar")) {
- const jarArgs = ["-Dfile.encoding=UTF-8", "-jar", coursier].concat(
- coursierArgs
- );
- return { promise: spawn(javaPath, jarArgs) };
+ const jarArgs = [
+ ...javaOptions,
+ ...fetchProperties,
+ "-Dfile.encoding=UTF-8",
+ "-jar",
+ coursier,
+ ].concat(coursierArgs);
+ return { promise: spawn(javaPath, jarArgs, environment) };
  } else {
+ // Convert Java properties to the "-J" argument form used by Coursier
+ var javaArgs: Array<string> = [];
+
+ // setting properties on windows native launcher doesn't work
+ if (process.platform != "win32")
+ javaArgs = javaOptions
+ .concat(["-Dfile.encoding=UTF-8"])
+ .concat(fetchProperties)
+ .map((p) => `-J${p}`);
+
  return {
- promise: spawn(
- coursier,
- ["-J-Dfile.encoding=UTF-8"].concat(coursierArgs)
- ),
+ promise: spawn(coursier, javaArgs.concat(coursierArgs), environment),
  };
  }
 }