[zypp-devel] (for libzypp-6.9) PoolQuery now allows to inspect the attributes that lead to a match.

25 Jun 2009

      Hi!

Some enhancement for the zypp::PoolQuery (for libzypp-6.9):

Assume a query where multipme attributes are involved:

       * // Setup query for "libzypp"  in name, provides or requires:
       * PoolQuery q;
       * q.addString( "libzypp" );
       * q.setMatchSubstring();
       * q.setCaseSensitive( false );
       * q.addAttribute( sat::SolvAttr::name );
       * q.addDependency( sat::SolvAttr::provides );
       * q.addDependency( sat::SolvAttr::requires );

       * // Iterate the result:
       * for_( solvIter, q.begin(), q.end() )
       * {
       *   cout << "Found matches in " << *solvIter << endl;
       * }

       * Output:
       * Found matches in PackageKit-0.3.11-1.12.i586(@System)
       * Found matches in libqdialogsolver1-1.2.6-1.1.2.i586(@System)
       * Found matches in libzypp-5.30.3-0.1.1.i586(@System)
       * Found matches in libzypp-testsuite-tools-4.2.6-8.1.i586(@System)
       * ...

The PoolQuery iterator allowed to visit each matching solvable, but you were 
not able to tell which of the attributes actually matched. This is now fixed.

The iterator now offers to visit all matching attributes within the solvable:

       * // Iterate the result:
       * for_( solvIter, q.begin(), q.end() )
       * {
       *   cout << "Found matches in " << *solvIter << endl;
       +   if ( verbose )
       +     for_( attrIter, solvIter.matchesBegin(), solvIter.matchesEnd() )
       +     {
       +       cout << "    " << attrIter->inSolvAttr() 
       +            << "\t\"" << attrIter->asString() 
       +            << "\"" << endl;
       +     }
       * }

       * Output:
       * Found matches in PackageKit-0.3.11-1.12.i586(@System)
       *    solvable:requires        "libzypp.so.523"
       * Found matches in libqdialogsolver1-1.2.6-1.1.2.i586(@System)
       *    solvable:requires        "libzypp.so.523"
       *    solvable:requires        "libzypp >= 5.25.3-0.1.2"
       * Found matches in libzypp-5.30.3-0.1.1.i586(@System)
       *    solvable:name            "libzypp"
       *    solvable:provides        "libzypp.so.523"
       *    solvable:provides        "libzypp = 5.30.3-0.1.1"
       * Found matches in libzypp-testsuite-tools-4.2.6-8.1.i586(@System)
       *    solvable:name            "libzypp-testsuite-tools"
       *    solvable:provides        "libzypp-testsuite-tools = 4.2.6-8.1"
       *    solvable:requires        "libzypp.so.523"
       * ...

Could be used by zypper/UI to give more feedback when searching.

-- 

cu,
    Michael Andres

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