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  • Committer: Thomas-Karl Pietrowski
  • Date: 2014-01-29 22:44:28 UTC
  • Revision ID: thopiekar@googlemail.com-20140129224428-gpcqnsdakby362n8
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zypp/repo/RepoVariables.cc
 
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/*---------------------------------------------------------------------\
 
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|                          ____ _   __ __ ___                          |
 
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|                         |__  / \ / / . \ . \                         |
 
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|                           / / \ V /|  _/  _/                         |
 
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|                          / /__ | | | | | |                           |
 
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|                         /_____||_| |_| |_|                           |
 
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|                                                                      |
 
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\---------------------------------------------------------------------*/
 
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#include "zypp/base/LogTools.h"
 
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#include "zypp/base/String.h"
 
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#include "zypp/ZConfig.h"
 
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#include "zypp/Target.h"
 
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#include "zypp/Arch.h"
 
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#include "zypp/repo/RepoVariables.h"
 
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#include "zypp/base/NonCopyable.h"
 
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///////////////////////////////////////////////////////////////////
 
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namespace zypp
 
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{
 
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  ///////////////////////////////////////////////////////////////////
 
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  namespace repo
 
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  {
 
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    ///////////////////////////////////////////////////////////////////
 
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    namespace
 
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    {
 
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      /** \brief Provide lazy initialized repo variables
 
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       */
 
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      struct ReplacerData : private zypp::base::NonCopyable
 
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      {
 
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        const std::string & sysarch() const
 
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        {
 
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          if ( _sysarch.empty() )
 
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            initArchStr();
 
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          return _sysarch;
 
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        }
 
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        const std::string & basearch() const
 
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        {
 
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          if ( _basearch.empty() )
 
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            initArchStr();
 
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          return _basearch;
 
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        }
 
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        const std::string & releasever() const
 
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        {
 
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          if( _releasever.empty() )
 
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            _releasever = Target::distributionVersion( Pathname()/*guess*/ );
 
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          return _releasever;
 
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        }
 
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      private:
 
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        void initArchStr() const
 
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        {
 
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          Arch arch( ZConfig::instance().systemArchitecture() );
 
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          _sysarch = arch.asString();
 
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          _basearch = arch.baseArch().asString();
 
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        }
 
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      private:
 
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        mutable std::string _sysarch;
 
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        mutable std::string _basearch;
 
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        mutable std::string _releasever;
 
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      };
 
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      /** \brief Replace repo variables on demand
 
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       *
 
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       * Initialisation of repo variables is delayed until they actually occur in
 
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       * a string.
 
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       */
 
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      std::string replacer( const std::string & value_r )
 
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      {
 
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        static ReplacerData _data;
 
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        std::string ret( value_r );
 
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        // Don't need to capture static (non automatic) _data in lambda
 
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        ret = str::replaceAllFun( ret, "$arch",         []()-> std::string { return _data.sysarch(); } );
 
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        ret = str::replaceAllFun( ret, "$basearch",     []()-> std::string { return _data.basearch(); } );
 
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        ret = str::replaceAllFun( ret, "$releasever",   []()-> std::string { return _data.releasever(); } );
 
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        return ret;
 
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      }
 
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    } // namespace
 
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    ///////////////////////////////////////////////////////////////////
 
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    std::string RepoVariablesStringReplacer::operator()( const std::string & value ) const
 
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    {
 
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      return replacer( value );
 
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    }
 
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    Url RepoVariablesUrlReplacer::operator()( const Url & value ) const
 
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    {
 
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      Url newurl( value );
 
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      newurl.setPathData( replacer( value.getPathData() ) );
 
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      newurl.setQueryString( replacer( value.getQueryString() ) );
 
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      return newurl;
 
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    }
 
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  } // namespace repo
 
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  ///////////////////////////////////////////////////////////////////
 
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} // namespace zypp
 
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///////////////////////////////////////////////////////////////////