Import chromium-64.0.3282.140

net/test/python_utils.cc

@@ -0,0 +1,135 @@
+// Copyright (c) 2011 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.
+
+#include "net/test/python_utils.h"
+
+#include <memory>
+
+#include "base/base_paths.h"
+#include "base/command_line.h"
+#include "base/environment.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/process/launch.h"
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+
+#if defined(OS_MACOSX)
+#include "base/mac/foundation_util.h"
+#endif
+
+const char kPythonPathEnv[] = "PYTHONPATH";
+const char kPythonVirtualEnv[] = "VIRTUAL_ENV";
+
+void ClearPythonPath() {
+  std::unique_ptr<base::Environment> env(base::Environment::Create());
+  env->UnSetVar(kPythonPathEnv);
+}
+
+void AppendToPythonPath(const base::FilePath& dir) {
+  std::unique_ptr<base::Environment> env(base::Environment::Create());
+  std::string old_path;
+  std::string dir_path;
+#if defined(OS_WIN)
+  dir_path = base::WideToUTF8(dir.value());
+#elif defined(OS_POSIX)
+  dir_path = dir.value();
+#endif
+  if (!env->GetVar(kPythonPathEnv, &old_path)) {
+    env->SetVar(kPythonPathEnv, dir_path.c_str());
+  } else if (old_path.find(dir_path) == std::string::npos) {
+    std::string new_path(old_path);
+#if defined(OS_WIN)
+    new_path.append(";");
+#elif defined(OS_POSIX)
+    new_path.append(":");
+#endif
+    new_path.append(dir_path.c_str());
+    env->SetVar(kPythonPathEnv, new_path);
+  }
+}
+
+bool GetPyProtoPath(base::FilePath* dir) {
+  // Locate the Python code generated by the protocol buffers compiler.
+  base::FilePath generated_code_dir;
+  if (!PathService::Get(base::DIR_EXE, &generated_code_dir)) {
+    LOG(ERROR) << "Can't find " << generated_code_dir.value();
+    return false;
+  }
+
+#if defined(OS_MACOSX)
+  if (base::mac::AmIBundled())
+    generated_code_dir = generated_code_dir.DirName().DirName().DirName();
+#endif
+
+  // Used for GYP. TODO(jam): remove after GN conversion.
+  const base::FilePath kPyProto(FILE_PATH_LITERAL("pyproto"));
+  if (base::DirectoryExists(generated_code_dir.Append(kPyProto))) {
+    *dir = generated_code_dir.Append(kPyProto);
+    return true;
+  }
+
+  // Used for GN.
+  const base::FilePath kGen(FILE_PATH_LITERAL("gen"));
+  if (base::DirectoryExists(generated_code_dir.Append(kGen))) {
+    *dir = generated_code_dir.Append(kGen);
+    return true;
+  }
+
+  return false;
+}
+
+#if defined(OS_WIN)
+struct PythonExePath {
+  PythonExePath() {
+    // This is test-only code, so CHECK with a subprocess invocation is ok.
+    base::CommandLine command(base::FilePath(FILE_PATH_LITERAL("cmd")));
+    command.AppendArg("/c");
+    command.AppendArg("python");
+    command.AppendArg("-c");
+    command.AppendArg("import sys; print sys.executable");
+    std::string output;
+    CHECK(GetAppOutput(command, &output));
+    // This does only work if cmd.exe doesn't use a non-US codepage.
+    path_ = base::ASCIIToUTF16(output);
+    TrimWhitespace(path_, base::TRIM_ALL, &path_);
+  }
+  base::string16 path_;
+};
+static base::LazyInstance<PythonExePath>::Leaky g_python_path;
+#endif
+
+bool IsInPythonVirtualEnv() {
+  return base::Environment::Create()->HasVar(kPythonVirtualEnv);
+}
+
+bool GetPythonCommand(base::CommandLine* python_cmd) {
+  DCHECK(python_cmd);
+
+#if defined(OS_WIN)
+  // Most developers have depot_tools in their path, which only has a
+  // python.bat, not a python.exe.  Go through cmd to find the path to
+  // the python executable.
+  // (Don't just return a a "cmd /c python" command line, because then tests
+  // that try to kill the python process will kill the cmd process instead,
+  // which can cause flakiness.)
+  python_cmd->SetProgram(base::FilePath(g_python_path.Get().path_));
+#else
+  python_cmd->SetProgram(base::FilePath(FILE_PATH_LITERAL("python")));
+#endif
+
+  // Launch python in unbuffered mode, so that python output doesn't mix with
+  // gtest output in buildbot log files. See http://crbug.com/147368.
+  python_cmd->AppendArg("-u");
+
+  if (!IsInPythonVirtualEnv()) {
+    // Prevent using system-installed libraries. Use hermetic versioned copies.
+    python_cmd->AppendArg("-S");
+  }
+
+  return true;
+}