text: // 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/logging.h"
  #include "base/path_service.h"
  #include "base/process/launch.h"
  #include "build/build_config.h"
  
  #if BUILDFLAG(IS_APPLE)
  #include "base/mac/foundation_util.h"
  #endif
  
  namespace {
  const base::FilePath::CharType kPythonPathEnv[] =
      FILE_PATH_LITERAL("PYTHONPATH");
  const base::FilePath::CharType kVPythonClearPathEnv[] =
      FILE_PATH_LITERAL("VPYTHON_CLEAR_PYTHONPATH");
  }  // namespace
  
  void SetPythonPathInEnvironment(const std::vector<base::FilePath>& python_path,
                                  base::EnvironmentMap* map) {
    base::NativeEnvironmentString path_str;
    for (const auto& path : python_path) {
      if (!path_str.empty()) {
  #if BUILDFLAG(IS_WIN)
        path_str.push_back(';');
  #else
        path_str.push_back(':');
  #endif
      }
      path_str += path.value();
    }
  
    (*map)[kPythonPathEnv] = path_str;
  
    // vpython has instructions on BuildBot (not swarming or LUCI) to clear
    // PYTHONPATH on invocation. Since we are clearing and manipulating it
    // ourselves, we don't want vpython to throw out our hard work.
    (*map)[kVPythonClearPathEnv] = base::NativeEnvironmentString();
  }
  
  bool GetPyProtoPath(base::FilePath* dir) {
    // Locate the Python code generated by the protocol buffers compiler.
    base::FilePath generated_code_dir;
    if (!base::PathService::Get(base::DIR_EXE, &generated_code_dir)) {
      LOG(ERROR) << "Can't find " << generated_code_dir.value();
      return false;
    }
  
  #if BUILDFLAG(IS_APPLE)
    if (base::mac::AmIBundled())
      generated_code_dir = generated_code_dir.DirName().DirName().DirName();
  #endif
  
    const base::FilePath kPyProto(FILE_PATH_LITERAL("pyproto"));
    if (base::DirectoryExists(generated_code_dir.Append(kPyProto))) {
      *dir = generated_code_dir.Append(kPyProto);
      return true;
    }
  
    return false;
  }
  
  bool GetPythonCommand(base::CommandLine* python_cmd) {
    DCHECK(python_cmd);
  
  // Use vpython to pick up src.git's vpython VirtualEnv spec.
  #if BUILDFLAG(IS_WIN)
    python_cmd->SetProgram(base::FilePath(FILE_PATH_LITERAL("vpython.bat")));
  #else
    python_cmd->SetProgram(base::FilePath(FILE_PATH_LITERAL("vpython")));
  #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");
  
    return true;
  }
  
  bool GetPython3Command(base::CommandLine* python_cmd) {
    DCHECK(python_cmd);
  
  // Use vpython3 to pick up src.git's vpython3 VirtualEnv spec.
  #if BUILDFLAG(IS_WIN)
    python_cmd->SetProgram(base::FilePath(FILE_PATH_LITERAL("vpython3.bat")));
  #else
    python_cmd->SetProgram(base::FilePath(FILE_PATH_LITERAL("vpython3")));
  #endif
  
  #if BUILDFLAG(IS_MAC)
    // Enable logging to help diagnose https://crbug.com/1254962. Remove this when
    // the bug is resolved.
    python_cmd->AppendArg("-vpython-log-level=info");
  #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");
  
    return true;
  }
  