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#include <apt-pkg/pkgcache.h>
#include <apt-pkg/cacheset.h>
#include <apt-pkg/macros.h>
#include <memory>
namespace APT
{
/** Simple wrapper class to abstract away the differences in storing different
* states in different places potentially in different versions.
*/
class APT_PUBLIC StateChanges
{
public:
// getter/setter for the different states
APT::VersionVector& Hold();
void Hold(pkgCache::VerIterator const &Ver);
APT::VersionVector& Unhold();
void Unhold(pkgCache::VerIterator const &Ver);
APT::VersionVector& Error();
// forgets all unsaved changes
void Discard();
/** commit the staged changes to the database(s).
*
* Makes the needed calls to store the requested states.
* After this call the state containers will hold only versions
* for which the storing operation succeeded. Versions where the
* storing operation failed are collected in #Error(). Note that
* error is an upper bound as states are changed in batches so it
* isn't always clear which version triggered the failure exactly.
*
* @param DiscardOutput controls if stdout/stderr should be used
* by subprocesses for (detailed) error reporting if needed.
* @return \b false if storing failed, true otherwise.
* Note that some states might be applied even if the whole operation failed.
*/
bool Save(bool const DiscardOutput = false);
StateChanges();
StateChanges(StateChanges&&);
StateChanges& operator=(StateChanges&&);
~StateChanges();
private:
class APT_HIDDEN Private;
std::unique_ptr<Private> d;
};
}
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