[android] Switch test scripts to use last modified time instead of md5sum when checking dependencie…

tools/android/timemodified/timemodified.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Recursively prints file modified times for Android. This version handles
+// files as well as directories. Its output is sorted by file path.
+
+#include <iostream>
+#include <string>
+
+#include "base/file_util.h"
+#include "base/files/file_enumerator.h"
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/platform_file.h"
+#include "base/time/time.h"
+
+namespace {
+
+bool PrintFileAccessTime(const base::FilePath& path) {
+  base::PlatformFileInfo file_info;
+  if (!file_util::GetFileInfo(path, &file_info))
+    return false;
+  std::cout << file_info.last_modified.ToTimeT() << "  "
+            << base::MakeAbsoluteFilePath(path).value() << std::endl;
+}
+
+// Prints the access times of all files contained in |files|. This handles
+// directories by walking them recursively. Excludes .svn directories and files
+// under them.
+bool PrintAccessTimesRecursively(int num_files, const char** files) {
+  // TODO(craigdh): Have an ignore list including .git directories.
+  const std::string svn_dir_component = FILE_PATH_LITERAL("/.svn/");

[bulach, 2013/07/15 18:35:20]

how about .git?

[craigdh, 2013/07/15 19:06:50]

It's not an issue right now because .git is only in the top level directory for
the source tree. It won't be an issue in the future because frank's isolate
changes hardlink only the dependencies before pushing so there won't be any
extra files. Once everything is switched to use isolate files the .svn check can
be removed as well.

[frankf, 2013/07/15 19:16:57]

Actually, this won't work if you're just pushing arbitrary directories that are
not generated by isolate, which is likely since PushIfNeeded is a general
utility method. 

On 2013/07/15 19:06:50, craigdh wrote:

+  for (const char** file = files; file != files + num_files; ++file) {
+    base::FilePath file_path(*file);
+    if (file_util::DirectoryExists(file_path)) {
+      base::FileEnumerator file_enumerator(
+          file_path, true /* recurse */, base::FileEnumerator::FILES);
+      base::FilePath child, empty;
+      while ((child = file_enumerator.Next()) != empty) {
+        // If the path contains /.svn/, ignore it.
+        if (child.value().find(svn_dir_component) == std::string::npos) {
+          if (!PrintFileAccessTime(child))
+            return false;
+        }
+      }
+    } else {
+      if (!PrintFileAccessTime(file_path))
+        return false;
+    }
+  }
+  return true;
+}
+
+}  // namespace
+
+int main(int argc, const char* argv[]) {
+  if (argc < 2) {
+    LOG(ERROR) << "Usage: timemodified <path/to/file_or_dir> ...";
+    return 1;
+  }
+  return PrintAccessTimesRecursively(argc - 1, argv + 1);
+}