RpmPostTransCollector.cc

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#include <iostream>
#include <fstream>
#include "zypp/base/LogTools.h"
#include "zypp/base/NonCopyable.h"
#include "zypp/target/RpmPostTransCollector.h"

#include "zypp/TmpPath.h"
#include "zypp/PathInfo.h"
#include "zypp/HistoryLog.h"
#include "zypp/ZYppCallbacks.h"
#include "zypp/ExternalProgram.h"
#include "zypp/target/rpm/RpmHeader.h"
#include "zypp/ZConfig.h"

using std::endl;
#undef ZYPP_BASE_LOGGER_LOGGROUP
#define ZYPP_BASE_LOGGER_LOGGROUP "zypp::posttrans"

namespace zypp
{
  namespace target
  {

    class RpmPostTransCollector::Impl : private base::NonCopyable
    {
      friend std::ostream & operator<<( std::ostream & str, const Impl & obj );
      friend std::ostream & dumpOn( std::ostream & str, const Impl & obj );
      public:
        Impl( const Pathname & root_r )
        : _root( root_r )
        {}

        ~Impl()
        { if ( !_scripts.empty() ) discardScripts(); }

        bool collectScriptFromPackage( ManagedFile rpmPackage_r )
        {
          rpm::RpmHeader::constPtr pkg( rpm::RpmHeader::readPackage( rpmPackage_r, rpm::RpmHeader::NOVERIFY ) );
          if ( ! pkg )
          {
            WAR << "Unexpectedly this is no package: " << rpmPackage_r << endl;
            return false;
          }

          std::string prog( pkg->tag_posttransprog() );
          if ( prog.empty() || prog == "<lua>" )        // by now leave lua to rpm
            return false;

          filesystem::TmpFile script( tmpDir(), rpmPackage_r->basename() );
          filesystem::addmod( script.path(), 0500 );
          script.autoCleanup( false );  // no autodelete; within a tmpdir
          {
            std::ofstream out( script.path().c_str() );
            out << "#! " << pkg->tag_posttransprog() << endl
                << pkg->tag_posttrans() << endl;
          }
          _scripts.push_back( script.path().basename() );
          MIL << "COLLECT posttrans: " << PathInfo( script.path() ) << endl;
          //DBG << "PROG:  " << pkg->tag_posttransprog() << endl;
          //DBG << "SCRPT: " << pkg->tag_posttrans() << endl;
          return true;
        }

        void executeScripts()
        {
          if ( _scripts.empty() )
            return;

          HistoryLog historylog;

          Pathname noRootScriptDir( ZConfig::instance().update_scriptsPath() / tmpDir().basename() );

          for ( const auto & script : _scripts )
          {
            MIL << "EXECUTE posttrans: " << script << endl;
            ExternalProgram prog( (noRootScriptDir/script).asString(), ExternalProgram::Stderr_To_Stdout, false, -1, true, _root );

            str::Str collect;
            for( std::string line = prog.receiveLine(); ! line.empty(); line = prog.receiveLine() )
            {
              DBG << line;
              collect << "    " << line;
            }
            int ret = prog.close();
            const std::string & scriptmsg( collect );

            if ( ret != 0 || ! scriptmsg.empty() )
            {
              const std::string & pkgident( script.substr( 0, script.size()-6 ) );      // strip tmp file suffix

              if ( ! scriptmsg.empty() )
              {
                str::Str msg;
                msg << "Output of " << pkgident << " %posttrans script:\n" << scriptmsg;
                historylog.comment( msg, true /*timestamp*/);
                JobReport::info( msg );
              }

              if ( ret != 0 )
              {
                str::Str msg;
                msg << pkgident << " %posttrans script failed (returned " << ret << ")";
                WAR << msg << endl;
                historylog.comment( msg, true /*timestamp*/);
                JobReport::warning( msg );
              }
            }
          }
          _scripts.clear();
        }

        void discardScripts()
        {
          if ( _scripts.empty() )
            return;

          HistoryLog historylog;

          str::Str msg;
          msg << "%posttrans scripts skipped while aborting:\n";
          for ( const auto & script : _scripts )
          {
            const std::string & pkgident( script.substr( 0, script.size()-6 ) );        // strip tmp file suffix
            WAR << "UNEXECUTED posttrans: " << script << endl;
            msg << "    " << pkgident << "\n";
          }

          historylog.comment( msg, true /*timestamp*/);
          JobReport::warning( msg );

          _scripts.clear();
        }

      private:
        Pathname tmpDir()
        {
          if ( !_ptrTmpdir ) _ptrTmpdir.reset( new filesystem::TmpDir( _root / ZConfig::instance().update_scriptsPath(), "posttrans" ) );
          DBG << _ptrTmpdir->path() << endl;
          return _ptrTmpdir->path();
        }

      private:
        Pathname _root;
        std::list<std::string> _scripts;
        boost::scoped_ptr<filesystem::TmpDir> _ptrTmpdir;
    };

    inline std::ostream & operator<<( std::ostream & str, const RpmPostTransCollector::Impl & obj )
    { return str << "RpmPostTransCollector::Impl"; }

    inline std::ostream & dumpOn( std::ostream & str, const RpmPostTransCollector::Impl & obj )
    { return str << obj; }

    //
    //  CLASS NAME : RpmPostTransCollector
    //

    RpmPostTransCollector::RpmPostTransCollector( const Pathname & root_r )
      : _pimpl( new Impl( root_r ) )
    {}

    RpmPostTransCollector::~RpmPostTransCollector()
    {}

    bool RpmPostTransCollector::collectScriptFromPackage( ManagedFile rpmPackage_r )
    { return _pimpl->collectScriptFromPackage( rpmPackage_r ); }

    void RpmPostTransCollector::executeScripts()
    { return _pimpl->executeScripts(); }

    void RpmPostTransCollector::discardScripts()
    { return _pimpl->discardScripts(); }

    std::ostream & operator<<( std::ostream & str, const RpmPostTransCollector & obj )
    { return str << *obj._pimpl; }

    std::ostream & dumpOn( std::ostream & str, const RpmPostTransCollector & obj )
    { return dumpOn( str, *obj._pimpl ); }

  } // namespace target
} // namespace zypp