From d424dee0ea34bb0b80803581d3234be84b3ccb1d Mon Sep 17 00:00:00 2001
From: cushon <cushon@google.com>
Date: Wed, 25 Jul 2018 17:41:24 -0700
Subject: Internal change

PiperOrigin-RevId: 206085005
---
 .../devtools/build/buildjar/javac/BlazeJavacMain.java   | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

(limited to 'src/java_tools')

diff --git a/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/javac/BlazeJavacMain.java b/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/javac/BlazeJavacMain.java
index f4bb407975..e03a3f584f 100644
--- a/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/javac/BlazeJavacMain.java
+++ b/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/javac/BlazeJavacMain.java
@@ -17,6 +17,7 @@ package com.google.devtools.build.buildjar.javac;
 import static com.google.common.collect.ImmutableList.toImmutableList;
 import static com.google.common.collect.Iterables.getOnlyElement;
 import static java.nio.charset.StandardCharsets.UTF_8;
+import static java.util.Comparator.comparing;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableList;
@@ -130,7 +131,7 @@ public class BlazeJavacMain {
     }
     errWriter.flush();
     return new BlazeJavacResult(
-        ok, filterDiagnostics(ok, diagnostics.build()), errOutput.toString(), compiler);
+        ok, filterDiagnostics(diagnostics.build()), errOutput.toString(), compiler);
   }
 
   private static final ImmutableSet<String> IGNORED_DIAGNOSTIC_CODES =
@@ -148,19 +149,23 @@ public class BlazeJavacMain {
           "compiler.warn.sun.proprietary");
 
   private static ImmutableList<FormattedDiagnostic> filterDiagnostics(
-      boolean ok, ImmutableList<FormattedDiagnostic> diagnostics) {
+      ImmutableList<FormattedDiagnostic> diagnostics) {
+    boolean werror =
+        diagnostics.stream().anyMatch(d -> d.getCode().equals("compiler.err.warnings.and.werror"));
     return diagnostics
         .stream()
-        .filter(d -> shouldReportDiagnostic(ok, d))
+        .filter(d -> shouldReportDiagnostic(werror, d))
+        // Print errors last to make them more visible.
+        .sorted(comparing(FormattedDiagnostic::getKind).reversed())
         .collect(toImmutableList());
   }
 
-  private static boolean shouldReportDiagnostic(boolean ok, FormattedDiagnostic diagnostic) {
+  private static boolean shouldReportDiagnostic(boolean werror, FormattedDiagnostic diagnostic) {
     if (!IGNORED_DIAGNOSTIC_CODES.contains(diagnostic.getCode())) {
       return true;
     }
-    if (!ok && diagnostic.getKind() != Diagnostic.Kind.NOTE) {
-      // show compiler.warn.sun.proprietary in case we're running with -Werror
+    // show compiler.warn.sun.proprietary if we're running with -Werror
+    if (werror && diagnostic.getKind() != Diagnostic.Kind.NOTE) {
       return true;
     }
     return false;
-- 
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