hunk.code_window:   if (releaseChannel.indexOf('staging') !== -1) return App.apiUrl.staging // return staging environment variables
   }
   ```
   You can do this for any amount of environment variables, too and return an entire object instead of just the url.
hunk.labels: keep keep keep replace replace
hunk.file_path: docs/versions/v24.0.0/guides/release-channels.md
hunk.type: replace
file: //  (C) Copyright Gennadiy Rozental 2001.
  //  Distributed under the Boost Software License, Version 1.0.
  //  (See accompanying file LICENSE_1_0.txt or copy at
  //  http://www.boost.org/LICENSE_1_0.txt)
  
  //  See http://www.boost.org/libs/test for the library home page.
  //
  //  File        : $RCSfile$
  //
  //  Version     : $Revision$
  //
  //  Description : implements compiler like Log formatter
  // ***************************************************************************
  
  #ifndef BOOST_TEST_COMPILER_LOG_FORMATTER_IPP_020105GER
  #define BOOST_TEST_COMPILER_LOG_FORMATTER_IPP_020105GER
  
  // Boost.Test
  #include <boost/test/output/compiler_log_formatter.hpp>
  
  #include <boost/test/framework.hpp>
  #include <boost/test/execution_monitor.hpp>
  #include <boost/test/unit_test_parameters.hpp>
  
  #include <boost/test/tree/test_unit.hpp>
  
  #include <boost/test/utils/basic_cstring/io.hpp>
  #include <boost/test/utils/lazy_ostream.hpp>
  #include <boost/test/utils/setcolor.hpp>
  
  
  // Boost
  #include <boost/version.hpp>
  
  // STL
  #include <iostream>
  
  #include <boost/test/detail/suppress_warnings.hpp>
  
  //____________________________________________________________________________//
  
  namespace boost {
  namespace unit_test {
  namespace output {
  
  // ************************************************************************** //
  // **************            compiler_log_formatter            ************** //
  // ************************************************************************** //
  
  namespace {
  
  std::string
  test_phase_identifier()
  {
      return framework::test_in_progress() ? framework::current_test_case().full_name() : std::string( "Test setup" );
  }
  
  } // local namespace
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_start( std::ostream& output, counter_t test_cases_amount )
  {
      m_color_output = runtime_config::get<bool>( runtime_config::COLOR_OUTPUT );
  
      if( test_cases_amount > 0 )
          output  << "Running " << test_cases_amount << " test "
                  << (test_cases_amount > 1 ? "cases" : "case") << "...\n";
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_finish( std::ostream& ostr )
  {
      ostr.flush();
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_build_info( std::ostream& output )
  {
      output  << "Platform: " << BOOST_PLATFORM            << '\n'
              << "Compiler: " << BOOST_COMPILER            << '\n'
              << "STL     : " << BOOST_STDLIB              << '\n'
              << "Boost   : " << BOOST_VERSION/100000      << "."
                              << BOOST_VERSION/100 % 1000  << "."
                              << BOOST_VERSION % 100       << std::endl;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::test_unit_start( std::ostream& output, test_unit const& tu )
  {
      BOOST_TEST_SCOPE_SETCOLOR( m_color_output, output, term_attr::BRIGHT, term_color::BLUE );
  
      print_prefix( output, tu.p_file_name, tu.p_line_num );
  
      output << "Entering test " << tu.p_type_name << " \"" << tu.p_name << "\"" << std::endl;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::test_unit_finish( std::ostream& output, test_unit const& tu, unsigned long elapsed )
  {
      BOOST_TEST_SCOPE_SETCOLOR( m_color_output, output, term_attr::BRIGHT, term_color::BLUE );
  
      print_prefix( output, tu.p_file_name, tu.p_line_num );
  
      output << "Leaving test " << tu.p_type_name << " \"" << tu.p_name << "\"";
  
      if( elapsed > 0 ) {
          output << "; testing time: ";
          if( elapsed % 1000 == 0 )
              output << elapsed/1000 << "ms";
          else
              output << elapsed << "us";
      }
  
      output << std::endl;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::test_unit_skipped( std::ostream& output, test_unit const& tu, const_string reason )
  {
      BOOST_TEST_SCOPE_SETCOLOR( m_color_output, output, term_attr::BRIGHT, term_color::YELLOW );
  
      print_prefix( output, tu.p_file_name, tu.p_line_num );
  
      output  << "Test " << tu.p_type_name << " \"" << tu.full_name() << "\"" << " is skipped because " << reason << std::endl;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_exception_start( std::ostream& output, log_checkpoint_data const& checkpoint_data, execution_exception const& ex )
  {
      execution_exception::location const& loc = ex.where();
  
      print_prefix( output, loc.m_file_name, loc.m_line_num );
  
      {
          BOOST_TEST_SCOPE_SETCOLOR( m_color_output, output, term_attr::UNDERLINE, term_color::RED );
  
          output << "fatal error: in \"" << (loc.m_function.is_empty() ? test_phase_identifier() : loc.m_function ) << "\": "
                 << ex.what();
      }
  
      if( !checkpoint_data.m_file_name.is_empty() ) {
          output << '\n';
          print_prefix( output, checkpoint_data.m_file_name, checkpoint_data.m_line_num );
  
          BOOST_TEST_SCOPE_SETCOLOR( m_color_output, output, term_attr::BRIGHT, term_color::CYAN );
  
          output << "last checkpoint";
          if( !checkpoint_data.m_message.empty() )
              output << ": " << checkpoint_data.m_message;
      }
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_exception_finish( std::ostream& output )
  {
      output << std::endl;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_entry_start( std::ostream& output, log_entry_data const& entry_data, log_entry_types let )
  {
      using namespace utils;
  
      switch( let ) {
          case BOOST_UTL_ET_INFO:
              print_prefix( output, entry_data.m_file_name, entry_data.m_line_num );
              if( m_color_output )
                  output << setcolor( term_attr::BRIGHT, term_color::GREEN );
              output << "info: ";
              break;
          case BOOST_UTL_ET_MESSAGE:
              if( m_color_output )
                  output << setcolor( term_attr::BRIGHT, term_color::CYAN );
              break;
          case BOOST_UTL_ET_WARNING:
              print_prefix( output, entry_data.m_file_name, entry_data.m_line_num );
              if( m_color_output )
                  output << setcolor( term_attr::BRIGHT, term_color::YELLOW );
              output << "warning: in \"" << test_phase_identifier() << "\": ";
              break;
          case BOOST_UTL_ET_ERROR:
              print_prefix( output, entry_data.m_file_name, entry_data.m_line_num );
              if( m_color_output )
                  output << setcolor( term_attr::BRIGHT, term_color::RED );
              output << "error: in \"" << test_phase_identifier() << "\": ";
              break;
          case BOOST_UTL_ET_FATAL_ERROR:
              print_prefix( output, entry_data.m_file_name, entry_data.m_line_num );
              if( m_color_output )
                  output << setcolor( term_attr::UNDERLINE, term_color::RED );
              output << "fatal error: in \"" << test_phase_identifier() << "\": ";
              break;
      }
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_entry_value( std::ostream& output, const_string value )
  {
      output << value;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_entry_value( std::ostream& output, lazy_ostream const& value )
  {
      output << value;
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_entry_finish( std::ostream& output )
  {
      if( m_color_output )
          output << utils::setcolor();
  
      output << std::endl;
  }
  
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::print_prefix( std::ostream& output, const_string file_name, std::size_t line_num )
  {
      if( !file_name.empty() ) {
  #ifdef __APPLE_CC__
          // Xcode-compatible logging format, idea by Richard Dingwall at
          // <http://richarddingwall.name/2008/06/01/using-the-boost-unit-test-framework-with-xcode-3/>.
          output << file_name << ':' << line_num << ": ";
  #else
          output << file_name << '(' << line_num << "): ";
  #endif
      }
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::entry_context_start( std::ostream& output, log_level l )
  {
      output << (l == log_successful_tests ? "\nAssertion" : "\nFailure" ) << " occurred in a following context:";
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::entry_context_finish( std::ostream& output )
  {
      output.flush();
  }
  
  //____________________________________________________________________________//
  
  void
  compiler_log_formatter::log_entry_context( std::ostream& output, const_string context_descr )
  {
      output << "\n    " << context_descr;
  }
  
  //____________________________________________________________________________//
  
  } // namespace output
  } // namespace unit_test
  } // namespace boost
  
  #include <boost/test/detail/enable_warnings.hpp>
  
  #endif // BOOST_TEST_COMPILER_LOG_FORMATTER_IPP_020105GER
  