fix

Author: andyscott

src/java/io/bazel/rulesscala/worker/Worker.java

@@ -6,6 +6,8 @@
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PrintStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.lang.SecurityManager;
 import java.security.Permission;
 import java.util.ArrayList;
@@ -15,6 +17,7 @@
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
+import java.nio.charset.StandardCharsets;
 
 import com.google.devtools.build.lib.worker.WorkerProtocol;
 
@@ -24,17 +27,6 @@ public static interface Interface {
 	public void work(String args[]) throws Exception;
     }
 
-    final static class ExitTrapped extends RuntimeException {
-	final int code;
-	ExitTrapped(int code) {
-	    super();
-	    this.code = code;
-	}
-    }
-
-    private static final Pattern exitPattern =
-	Pattern.compile("exitVM\\.(-?\\d+)");
-
     public static void workerMain(String workerArgs[], Interface workerInterface) throws Exception {
 	if (workerArgs.length > 0 && workerArgs[0].equals("--persistent_worker")) {
 
@@ -65,13 +57,7 @@ public void checkPermission(Permission permission) {
 		    int code = 0;
 
 		    try {
-			List<String> argList = request.getArgumentsList();
-			int numArgs = argList.size();
-			String[] args = new String[numArgs];
-			for (int i = 0; i < numArgs; i++) {
-			    args[i] = argList.get(i);
-			}
-			workerInterface.work(args);
+			workerInterface.work(stringListToArray(request.getArgumentsList()));
 		    } catch (ExitTrapped e) {
 			code = e.code;
 		    } catch (Exception e) {
@@ -96,7 +82,33 @@ public void checkPermission(Permission permission) {
 		System.setErr(stderr);
 	    }
 	} else {
+	    String[] args;
+	    if (workerArgs.length == 1 && workerArgs[0].startsWith("@")) {
+		args = stringListToArray(Files.readAllLines(Paths.get(workerArgs[0].substring(1)), StandardCharsets.UTF_8));
+	    } else {
+		args = workerArgs;
+	    }
 	    workerInterface.work(workerArgs);
 	}
     }
+
+    private static class ExitTrapped extends RuntimeException {
+	final int code;
+	ExitTrapped(int code) {
+	    super();
+	    this.code = code;
+	}
+    }
+
+    private static Pattern exitPattern =
+	Pattern.compile("exitVM\\.(-?\\d+)");
+
+    private static String[] stringListToArray(List<String> argList) {
+	int numArgs = argList.size();
+	String[] args = new String[numArgs];
+	for (int i = 0; i < numArgs; i++) {
+	    args[i] = argList.get(i);
+	}
+	return args;
+    }
 }