Update from Google.
--
MOE_MIGRATED_REVID=85702957
diff --git a/src/main/java/com/google/devtools/build/lib/shell/LogUtil.java b/src/main/java/com/google/devtools/build/lib/shell/LogUtil.java
new file mode 100644
index 0000000..ab646f6
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/shell/LogUtil.java
@@ -0,0 +1,54 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.google.devtools.build.lib.shell;
+
+/**
+ * Utilities for logging.
+ */
+class LogUtil {
+
+ private LogUtil() {}
+
+ private final static int TRUNCATE_STRINGS_AT = 150;
+
+ /**
+ * Make a string out of a byte array, and truncate it to a reasonable length.
+ * Useful for preventing logs from becoming excessively large.
+ */
+ static String toTruncatedString(final byte[] bytes) {
+ if(bytes == null || bytes.length == 0) {
+ return "";
+ }
+ /*
+ * Yes, we'll use the platform encoding here, and this is one of the rare
+ * cases where it makes sense. You want the logs to be encoded so that
+ * your platform tools (vi, emacs, cat) can render them, don't you?
+ * In practice, this means ISO-8859-1 or UTF-8, I guess.
+ */
+ try {
+ if (bytes.length > TRUNCATE_STRINGS_AT) {
+ return new String(bytes, 0, TRUNCATE_STRINGS_AT)
+ + "[... truncated. original size was " + bytes.length + " bytes.]";
+ }
+ return new String(bytes);
+ } catch (Exception e) {
+ /*
+ * In case encoding a binary string doesn't work for some reason, we
+ * don't want to bring a logging server down - do we? So we're paranoid.
+ */
+ return "IOUtil.toTruncatedString: " + e.getMessage();
+ }
+ }
+
+}
