[apt.git] / apt-pkg / packagemanager.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: packagemanager.cc,v 1.22 1999/10/22 05:58:54 jgg Exp $
/* ######################################################################

   Package Manager - Abstacts the package manager

   More work is needed in the area of transitioning provides, ie exim
   replacing smail. This can cause interesing side effects.

   Other cases involving conflicts+replaces should be tested. 
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#ifdef __GNUG__
#pragma implementation "apt-pkg/packagemanager.h"
#endif
#include <apt-pkg/packagemanager.h>
#include <apt-pkg/orderlist.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/error.h>
#include <apt-pkg/version.h>
#include <apt-pkg/acquire-item.h>
#include <apt-pkg/algorithms.h>
#include <apt-pkg/configuration.h>
									/*}}}*/

// PM::PackageManager - Constructor					/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgPackageManager::pkgPackageManager(pkgDepCache &Cache) : Cache(Cache)
{
   FileNames = new string[Cache.Head().PackageCount];
   List = 0;
   Debug = _config->FindB("Debug::pkgPackageManager",false);
}
									/*}}}*/
// PM::PackageManager - Destructor					/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgPackageManager::~pkgPackageManager()
{
   delete List;
   delete [] FileNames;
}
									/*}}}*/
// PM::GetArchives - Queue the archives for download			/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgPackageManager::GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
				    pkgRecords *Recs)
{
   if (CreateOrderList() == false)
      return false;
   
   if (List->OrderUnpack() == false)
      return _error->Error("Internal ordering error");

   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
   {
      PkgIterator Pkg(Cache,*I);
      FileNames[Pkg->ID] = string();
      
      // Skip packages to erase
      if (Cache[Pkg].Delete() == true)
	 continue;

      // Skip Packages that need configure only.
      if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && 
	  Cache[Pkg].Keep() == true)
	 continue;

      // Skip already processed packages
      if (List->IsNow(Pkg) == false)
	 continue;
	 
      new pkgAcqArchive(Owner,Sources,Recs,Cache[Pkg].InstVerIter(Cache),
			FileNames[Pkg->ID]);
   }

   return true;
}
									/*}}}*/
// PM::FixMissing - Keep all missing packages				/*{{{*/
// ---------------------------------------------------------------------
/* This is called to correct the installation when packages could not
   be downloaded. */
bool pkgPackageManager::FixMissing()
{   
   pkgProblemResolver Resolve(Cache);
   List->SetFileList(FileNames);
   
   bool Bad = false;
   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
   {
      if (List->IsMissing(I) == false)
	 continue;
   
      // Okay, this file is missing and we need it. Mark it for keep 
      Bad = true;
      Cache.MarkKeep(I);
   }
 
   // We have to empty the list otherwise it will not have the new changes
   delete List;
   List = 0;
   
   if (Bad == false)
      return true;
   
   // Now downgrade everything that is broken
   return Resolve.ResolveByKeep() == true && Cache.BrokenCount() == 0;   
}
									/*}}}*/

// PM::CreateOrderList - Create the ordering class			/*{{{*/
// ---------------------------------------------------------------------
/* This populates the ordering list with all the packages that are
   going to change. */
bool pkgPackageManager::CreateOrderList()
{
   if (List != 0)
      return true;
   
   delete List;
   List = new pkgOrderList(Cache);
   
   bool NoImmConfigure = _config->FindB("APT::Immediate-Configure",false);
   
   // Generate the list of affected packages and sort it
   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
   {
      // Mark the package and its dependends for immediate configuration
      if (((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential ||
	   (I->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important) &&
	  NoImmConfigure == false)
      {
	 List->Flag(I,pkgOrderList::Immediate);
	 
	 // Look for other packages to make immediate configurea
	 if (Cache[I].InstallVer != 0)
	    for (DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); 
		 D.end() == false; D++)
	       if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
		  List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
	 
	 // And again with the current version.
	 if (I->CurrentVer != 0)
	    for (DepIterator D = I.CurrentVer().DependsList(); 
		 D.end() == false; D++)
	       if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
		  List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
      }
      
      // Not interesting
      if ((Cache[I].Keep() == true || 
	  Cache[I].InstVerIter(Cache) == I.CurrentVer()) && 
	  I.State() == pkgCache::PkgIterator::NeedsNothing &&
	  (Cache[I].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall &&
	  (I.Purge() != false || Cache[I].Mode != pkgDepCache::ModeDelete ||
	   (Cache[I].iFlags & pkgDepCache::Purge) != pkgDepCache::Purge))
	 continue;
      
      // Append it to the list
      List->push_back(I);      
   }
   
   return true;
}
									/*}}}*/
// PM::DepAlwaysTrue - Returns true if this dep is irrelevent		/*{{{*/
// ---------------------------------------------------------------------
/* The restriction on provides is to eliminate the case when provides
   are transitioning between valid states [ie exim to smail] */
bool pkgPackageManager::DepAlwaysTrue(DepIterator D)
{
   if (D.TargetPkg()->ProvidesList != 0)
      return false;
   
   if ((Cache[D] & pkgDepCache::DepInstall) != 0 &&
       (Cache[D] & pkgDepCache::DepNow) != 0)
      return true;
   return false;
}
									/*}}}*/
// PM::CheckRConflicts - Look for reverse conflicts			/*{{{*/
// ---------------------------------------------------------------------
/* This looks over the reverses for a conflicts line that needs early
   removal. */
bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
					const char *Ver)
{
   for (;D.end() == false; D++)
   {
      if (D->Type != pkgCache::Dep::Conflicts)
	 continue;
      
      if (D.ParentPkg() == Pkg)
	 continue;
      
      if (pkgCheckDep(D.TargetVer(),Ver,D->CompareOp) == false)
	 continue;

      if (List->IsNow(Pkg) == false)
	 continue;
      
      if (EarlyRemove(D.ParentPkg()) == false)
	 return false;
   }  
   return true;
}
									/*}}}*/
// PM::ConfigureAll - Run the all out configuration			/*{{{*/
// ---------------------------------------------------------------------
/* This configures every package. It is assumed they are all unpacked and
   that the final configuration is valid. */
bool pkgPackageManager::ConfigureAll()
{
   pkgOrderList OList(Cache);
   
   // Populate the order list
   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
      if (List->IsFlag(pkgCache::PkgIterator(Cache,*I),
		       pkgOrderList::UnPacked) == true)
	 OList.push_back(*I);
   
   if (OList.OrderConfigure() == false)
      return false;
   
   // Perform the configuring
   for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
   {
      PkgIterator Pkg(Cache,*I);
      
      if (Configure(Pkg) == false)
	 return false;
      
      List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
   }
   
   return true;
}
									/*}}}*/
// PM::SmartConfigure - Perform immediate configuration of the pkg	/*{{{*/
// ---------------------------------------------------------------------
/* This routine scheduals the configuration of the given package and all
   of it's dependents. */
bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
{
   pkgOrderList OList(Cache);

   if (DepAdd(OList,Pkg) == false)
      return false;
   
   if (OList.OrderConfigure() == false)
      return false;

   // Perform the configuring
   for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
   {
      PkgIterator Pkg(Cache,*I);
      
      if (Configure(Pkg) == false)
	 return false;
      
      List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
   }

   // Sanity Check
   if (List->IsFlag(Pkg,pkgOrderList::Configured) == false)
      return _error->Error("Internal error, could not immediate configure %s",Pkg.Name());
   
   return true;
}
									/*}}}*/
// PM::DepAdd - Add all dependents to the oder list			/*{{{*/
// ---------------------------------------------------------------------
/* This recursively adds all dependents to the order list */
bool pkgPackageManager::DepAdd(pkgOrderList &OList,PkgIterator Pkg,int Depth)
{
   if (OList.IsFlag(Pkg,pkgOrderList::Added) == true)
      return true;
   if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
      return true;
   if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == false)
      return false;
   
   
   // Put the package on the list
   OList.push_back(Pkg);
   OList.Flag(Pkg,pkgOrderList::Added);
   Depth++;

   // Check the dependencies to see if they are all satisfied.
   bool Bad = false;
   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); D.end() == false;)
   {
      if (D->Type != pkgCache::Dep::Depends && D->Type != pkgCache::Dep::PreDepends)
      {
	 D++;
	 continue;
      }
      
      // Grok or groups
      Bad = true;
      for (bool LastOR = true; D.end() == false && LastOR == true; D++)
      {
	 LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
	 
	 if (Bad == false)
	    continue;

	 Version **VList = D.AllTargets();
	 for (Version **I = VList; *I != 0 && Bad == true; I++)
	 {
	    VerIterator Ver(Cache,*I);
	    PkgIterator Pkg = Ver.ParentPkg();

	    // See if the current version is ok
	    if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true && 
		Pkg.State() == PkgIterator::NeedsNothing)
	    {
	       Bad = false;
	       continue;
	    }
	    
	    // Not the install version 
	    if (Cache[Pkg].InstallVer != *I || 
		(Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
	       continue;
	    if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == true)
	       Bad = !DepAdd(OList,Pkg,Depth);
	    if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
	       Bad = false;
	 }
	 delete [] VList;
      }
      
      if (Bad == true)
      {
	 OList.Flag(Pkg,0,pkgOrderList::Added);
	 OList.pop_back();
	 Depth--;
	 return false;
      }
   }
   
   Depth--;
   return true;
}
									/*}}}*/
// PM::EarlyRemove - Perform removal of packages before their time	/*{{{*/
// ---------------------------------------------------------------------
/* This is called to deal with conflicts arising from unpacking */
bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
{
   if (List->IsNow(Pkg) == false)
      return true;
	 
   // Already removed it
   if (List->IsFlag(Pkg,pkgOrderList::Removed) == true)
      return true;
   
   // Woops, it will not be re-installed!
   if (List->IsFlag(Pkg,pkgOrderList::InList) == false)
      return false;

   // Essential packages get special treatment
   if ((Pkg->Flags & pkgCache::Flag::Essential) != 0)
   {
      if (_config->FindB("APT::Force-LoopBreak",false) == false)
	 return _error->Error("This installation run will require temporarily "
			      "removing the essential package %s due to a "
			      "Conflicts/Pre-Depends loop. This is often bad, "
			      "but if you really want to do it, activate the "
			      "APT::Force-LoopBreak option.",Pkg.Name());
   }
   
   bool Res = SmartRemove(Pkg);
   if (Cache[Pkg].Delete() == false)
      List->Flag(Pkg,pkgOrderList::Removed,pkgOrderList::States);
   
   return Res;
}
									/*}}}*/
// PM::SmartRemove - Removal Helper					/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
{
   if (List->IsNow(Pkg) == false)
      return true;

   List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
   return Remove(Pkg,(Cache[Pkg].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge);
}
									/*}}}*/
// PM::SmartUnPack - Install helper					/*{{{*/
// ---------------------------------------------------------------------
/* This performs the task of handling pre-depends. */
bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
{
   // Check if it is already unpacked
   if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
       Cache[Pkg].Keep() == true)
   {
      List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
      if (List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
	 if (SmartConfigure(Pkg) == false)
	    return _error->Error("Internal Error, Could not perform immediate configuraton");
      return true;
   }

   /* See if this packages install version has any predependencies
      that are not met by 'now' packages. */
   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); 
	D.end() == false; )
   {
      // Compute a single dependency element (glob or)
      pkgCache::DepIterator Start;
      pkgCache::DepIterator End;
      D.GlobOr(Start,End);
      
      while (End->Type == pkgCache::Dep::PreDepends)
      {
	 // Look for possible ok targets.
	 Version **VList = Start.AllTargets();
	 bool Bad = true;
	 for (Version **I = VList; *I != 0 && Bad == true; I++)
	 {
	    VerIterator Ver(Cache,*I);
	    PkgIterator Pkg = Ver.ParentPkg();
	    
	    // See if the current version is ok
	    if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true && 
		Pkg.State() == PkgIterator::NeedsNothing)
	    {
	       Bad = false;
	       continue;
	    }
	 }
	 
	 // Look for something that could be configured.
	 for (Version **I = VList; *I != 0 && Bad == true; I++)
	 {
	    VerIterator Ver(Cache,*I);
	    PkgIterator Pkg = Ver.ParentPkg();
	    
	    // Not the install version 
	    if (Cache[Pkg].InstallVer != *I || 
		(Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
	       continue;

	    Bad = !SmartConfigure(Pkg);
	 }
	 
	 delete [] VList;

	 /* If this or element did not match then continue on to the
	    next or element until a matching element is found*/
	 if (Bad == true)
	 {	    
	    if (Start == End)
	       return _error->Error("Internal Error, Couldn't configure a pre-depend");
	    Start++;
	 }
	 else
	    break;
      }
      
      if (End->Type == pkgCache::Dep::Conflicts)
      {
	 /* Look for conflicts. Two packages that are both in the install
	    state cannot conflict so we don't check.. */
	 Version **VList = End.AllTargets();
	 for (Version **I = VList; *I != 0; I++)
	 {
	    VerIterator Ver(Cache,*I);
	    PkgIterator Pkg = Ver.ParentPkg();
	    
	    // See if the current version is conflicting
	    if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true)
	    {
	       if (EarlyRemove(Pkg) == false)
		  return _error->Error("Internal Error, Could not early remove %s",Pkg.Name());
	    }
	 }
	 delete [] VList;
      }
   }

   // Check for reverse conflicts.
   CheckRConflicts(Pkg,Pkg.RevDependsList(),
		   Cache[Pkg].InstVerIter(Cache).VerStr());
   for (PrvIterator P = Cache[Pkg].InstVerIter(Cache).ProvidesList(); 
	P.end() == false; P++)
      CheckRConflicts(Pkg,P.ParentPkg().RevDependsList(),P.ProvideVersion());
   
   if (Install(Pkg,FileNames[Pkg->ID]) == false)
      return false;
   
   List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
   
   // Perform immedate configuration of the package.
   if (List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
      if (SmartConfigure(Pkg) == false)
	 return _error->Error("Internal Error, Could not perform immediate configuraton");
   
   return true;
}
									/*}}}*/
// PM::OrderInstall - Installation ordering routine			/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
{
   if (CreateOrderList() == false)
      return Failed;

   Reset();
   
   if (Debug == true)
      clog << "Begining to order" << endl;

   if (List->OrderUnpack(FileNames) == false)
   {
      _error->Error("Internal ordering error");
      return Failed;
   }
   
   if (Debug == true)
      clog << "Done ordering" << endl;

   bool DoneSomething = false;
   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
   {
      PkgIterator Pkg(Cache,*I);

      if (List->IsNow(Pkg) == false)
      {
	 if (Debug == true)
	    clog << "Skipping already done " << Pkg.Name() << endl;
	 continue;
      }
      
      if (List->IsMissing(Pkg) == true)
      {
	 if (Debug == true)
	    clog << "Sequence completed at" << Pkg.Name() << endl;
	 if (DoneSomething == false)
	 {
	    _error->Error("Internal Error, ordering was unable to handle the media swap");
	    return Failed;
	 }	 
	 return Incomplete;
      }
      
      // Sanity check
      if (Cache[Pkg].Keep() == true && 
	  Pkg.State() == pkgCache::PkgIterator::NeedsNothing &&
	  (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)
      {
	 _error->Error("Internal Error, trying to manipulate a kept package");
	 return Failed;
      }
      
      // Perform a delete or an install
      if (Cache[Pkg].Delete() == true)
      {
	 if (SmartRemove(Pkg) == false)
	    return Failed;
      }
      else
	 if (SmartUnPack(Pkg) == false)
	    return Failed;
      DoneSomething = true;
   }
   
   // Final run through the configure phase
   if (ConfigureAll() == false)
      return Failed;

   // Sanity check
   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
   {
      if (List->IsFlag(*I,pkgOrderList::Configured) == false)
      {
	 _error->Error("Internal error, packages left unconfigured. %s",
		       PkgIterator(Cache,*I).Name());
	 return Failed;
      }
   }   
	 
   return Completed;
}
									/*}}}*/
// PM::DoInstall - Does the installation				/*{{{*/
// ---------------------------------------------------------------------
/* This uses the filenames in FileNames and the information in the
   DepCache to perform the installation of packages.*/
pkgPackageManager::OrderResult pkgPackageManager::DoInstall()
{
   OrderResult Res = OrderInstall();
   if (Res != Failed)
      if (Go() == false)
	 return Failed;
   return Res;
}
									/*}}}*/
Commit	Line	Data
6c139d6e AL	1	// -- mode: cpp; mode: fold --
6c139d6e AL	2	// Description /{{{/
d0c59649	3	// $Id: packagemanager.cc,v 1.22 1999/10/22 05:58:54 jgg Exp $
6c139d6e AL	4	/* ######################################################################
	5
	6	Package Manager - Abstacts the package manager
	7
	8	More work is needed in the area of transitioning provides, ie exim
	9	replacing smail. This can cause interesing side effects.
	10
	11	Other cases involving conflicts+replaces should be tested.
	12
	13	##################################################################### */
	14	/}}}/
	15	// Include Files /{{{/
	16	#ifdef __GNUG__
094a497d	17	#pragma implementation "apt-pkg/packagemanager.h"
6c139d6e	18	#endif
094a497d AL	19	#include <apt-pkg/packagemanager.h>
	20	#include <apt-pkg/orderlist.h>
	21	#include <apt-pkg/depcache.h>
	22	#include <apt-pkg/error.h>
	23	#include <apt-pkg/version.h>
03e39e59	24	#include <apt-pkg/acquire-item.h>
30e1eab5 AL	25	#include <apt-pkg/algorithms.h>
30e1eab5 AL	26	#include <apt-pkg/configuration.h>
6c139d6e AL	27	/}}}/
	28
	29	// PM::PackageManager - Constructor /{{{/
	30	// ---------------------------------------------------------------------
	31	/* */
	32	pkgPackageManager::pkgPackageManager(pkgDepCache &Cache) : Cache(Cache)
	33	{
	34	FileNames = new string[Cache.Head().PackageCount];
	35	List = 0;
30e1eab5	36	Debug = _config->FindB("Debug::pkgPackageManager",false);
6c139d6e AL	37	}
	38	/}}}/
	39	// PM::PackageManager - Destructor /{{{/
	40	// ---------------------------------------------------------------------
	41	/* */
	42	pkgPackageManager::~pkgPackageManager()
	43	{
	44	delete List;
	45	delete [] FileNames;
	46	}
	47	/}}}/
03e39e59 AL	48	// PM::GetArchives - Queue the archives for download /{{{/
	49	// ---------------------------------------------------------------------
	50	/* */
	51	bool pkgPackageManager::GetArchives(pkgAcquire Owner,pkgSourceList Sources,
	52	pkgRecords *Recs)
	53	{
7a1b1f8b AL	54	if (CreateOrderList() == false)
	55	return false;
	56
	57	if (List->OrderUnpack() == false)
	58	return _error->Error("Internal ordering error");
	59
	60	for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
	61	{
	62	PkgIterator Pkg(Cache,*I);
281daf46 AL	63	FileNames[Pkg->ID] = string();
281daf46 AL	64
7a1b1f8b AL	65	// Skip packages to erase
7a1b1f8b AL	66	if (Cache[Pkg].Delete() == true)
03e39e59	67	continue;
d38b7b3d AL	68
d38b7b3d AL	69	// Skip Packages that need configure only.
9dbb421f AL	70	if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
9dbb421f AL	71	Cache[Pkg].Keep() == true)
d38b7b3d	72	continue;
281daf46 AL	73
	74	// Skip already processed packages
	75	if (List->IsNow(Pkg) == false)
	76	continue;
	77
7a1b1f8b AL	78	new pkgAcqArchive(Owner,Sources,Recs,Cache[Pkg].InstVerIter(Cache),
7a1b1f8b AL	79	FileNames[Pkg->ID]);
03e39e59	80	}
7a1b1f8b	81
03e39e59 AL	82	return true;
	83	}
	84	/}}}/
6c139d6e AL	85	// PM::FixMissing - Keep all missing packages /{{{/
	86	// ---------------------------------------------------------------------
	87	/* This is called to correct the installation when packages could not
	88	be downloaded. */
	89	bool pkgPackageManager::FixMissing()
bdae53f1	90	{
30e1eab5	91	pkgProblemResolver Resolve(Cache);
2fd65468 AL	92	List->SetFileList(FileNames);
2fd65468 AL	93
9dbb421f	94	bool Bad = false;
6c139d6e AL	95	for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
6c139d6e AL	96	{
2fd65468	97	if (List->IsMissing(I) == false)
9dbb421f	98	continue;
2fd65468	99
9dbb421f AL	100	// Okay, this file is missing and we need it. Mark it for keep
9dbb421f AL	101	Bad = true;
6c139d6e AL	102	Cache.MarkKeep(I);
6c139d6e AL	103	}
bdae53f1 AL	104
	105	// We have to empty the list otherwise it will not have the new changes
	106	delete List;
	107	List = 0;
6c139d6e	108
9dbb421f AL	109	if (Bad == false)
	110	return true;
	111
6c139d6e	112	// Now downgrade everything that is broken
30e1eab5	113	return Resolve.ResolveByKeep() == true && Cache.BrokenCount() == 0;
6c139d6e AL	114	}
	115	/}}}/
	116
7a1b1f8b AL	117	// PM::CreateOrderList - Create the ordering class /{{{/
	118	// ---------------------------------------------------------------------
	119	/* This populates the ordering list with all the packages that are
	120	going to change. */
	121	bool pkgPackageManager::CreateOrderList()
	122	{
281daf46 AL	123	if (List != 0)
	124	return true;
	125
7a1b1f8b AL	126	delete List;
	127	List = new pkgOrderList(Cache);
	128
b780bc1b	129	bool NoImmConfigure = _config->FindB("APT::Immediate-Configure",false);
079cc404	130
7a1b1f8b AL	131	// Generate the list of affected packages and sort it
	132	for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
	133	{
138d4b3d AL	134	// Mark the package and its dependends for immediate configuration
	135	if (((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential \|\|
	136	(I->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important) &&
079cc404	137	NoImmConfigure == false)
7a1b1f8b AL	138	{
7a1b1f8b AL	139	List->Flag(I,pkgOrderList::Immediate);
d38b7b3d AL	140
d38b7b3d AL	141	// Look for other packages to make immediate configurea
7a1b1f8b AL	142	if (Cache[I].InstallVer != 0)
	143	for (DepIterator D = Cache[I].InstVerIter(Cache).DependsList();
	144	D.end() == false; D++)
	145	if (D->Type == pkgCache::Dep::Depends \|\| D->Type == pkgCache::Dep::PreDepends)
	146	List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
d38b7b3d AL	147
d38b7b3d AL	148	// And again with the current version.
7a1b1f8b AL	149	if (I->CurrentVer != 0)
	150	for (DepIterator D = I.CurrentVer().DependsList();
	151	D.end() == false; D++)
	152	if (D->Type == pkgCache::Dep::Depends \|\| D->Type == pkgCache::Dep::PreDepends)
	153	List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
	154	}
	155
	156	// Not interesting
	157	if ((Cache[I].Keep() == true \|\|
	158	Cache[I].InstVerIter(Cache) == I.CurrentVer()) &&
d556d1a1	159	I.State() == pkgCache::PkgIterator::NeedsNothing &&
d0c59649	160	(Cache[I].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall &&
d556d1a1 AL	161	(I.Purge() != false \|\| Cache[I].Mode != pkgDepCache::ModeDelete \|\|
d556d1a1 AL	162	(Cache[I].iFlags & pkgDepCache::Purge) != pkgDepCache::Purge))
7a1b1f8b AL	163	continue;
	164
	165	// Append it to the list
138d4b3d	166	List->push_back(I);
7a1b1f8b AL	167	}
	168
	169	return true;
	170	}
	171	/}}}/
6c139d6e AL	172	// PM::DepAlwaysTrue - Returns true if this dep is irrelevent /{{{/
	173	// ---------------------------------------------------------------------
	174	/* The restriction on provides is to eliminate the case when provides
	175	are transitioning between valid states [ie exim to smail] */
	176	bool pkgPackageManager::DepAlwaysTrue(DepIterator D)
	177	{
	178	if (D.TargetPkg()->ProvidesList != 0)
	179	return false;
	180
	181	if ((Cache[D] & pkgDepCache::DepInstall) != 0 &&
	182	(Cache[D] & pkgDepCache::DepNow) != 0)
	183	return true;
	184	return false;
	185	}
	186	/}}}/
	187	// PM::CheckRConflicts - Look for reverse conflicts /{{{/
	188	// ---------------------------------------------------------------------
	189	/* This looks over the reverses for a conflicts line that needs early
	190	removal. */
	191	bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
	192	const char *Ver)
	193	{
	194	for (;D.end() == false; D++)
	195	{
b50b2c97	196	if (D->Type != pkgCache::Dep::Conflicts)
6c139d6e AL	197	continue;
	198
	199	if (D.ParentPkg() == Pkg)
	200	continue;
	201
	202	if (pkgCheckDep(D.TargetVer(),Ver,D->CompareOp) == false)
	203	continue;
	204
	205	if (List->IsNow(Pkg) == false)
	206	continue;
	207
	208	if (EarlyRemove(D.ParentPkg()) == false)
	209	return false;
	210	}
	211	return true;
	212	}
	213	/}}}/
	214	// PM::ConfigureAll - Run the all out configuration /{{{/
	215	// ---------------------------------------------------------------------
	216	/* This configures every package. It is assumed they are all unpacked and
	217	that the final configuration is valid. */
	218	bool pkgPackageManager::ConfigureAll()
	219	{
	220	pkgOrderList OList(Cache);
	221
	222	// Populate the order list
	223	for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
	224	if (List->IsFlag(pkgCache::PkgIterator(Cache,*I),
	225	pkgOrderList::UnPacked) == true)
	226	OList.push_back(*I);
	227
	228	if (OList.OrderConfigure() == false)
	229	return false;
	230
	231	// Perform the configuring
	232	for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
	233	{
	234	PkgIterator Pkg(Cache,*I);
	235
	236	if (Configure(Pkg) == false)
	237	return false;
	238
	239	List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
	240	}
	241
	242	return true;
	243	}
	244	/}}}/
	245	// PM::SmartConfigure - Perform immediate configuration of the pkg /{{{/
	246	// ---------------------------------------------------------------------
	247	/* This routine scheduals the configuration of the given package and all
	248	of it's dependents. */
	249	bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
	250	{
	251	pkgOrderList OList(Cache);
	252
	253	if (DepAdd(OList,Pkg) == false)
	254	return false;
	255
	256	if (OList.OrderConfigure() == false)
	257	return false;
	258
	259	// Perform the configuring
	260	for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
261	{
262	PkgIterator Pkg(Cache,*I);
263
264	if (Configure(Pkg) == false)
265	return false;
266
267	List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
268	}
269
270	// Sanity Check
271	if (List->IsFlag(Pkg,pkgOrderList::Configured) == false)
272	return _error->Error("Internal error, could not immediate configure %s",Pkg.Name());
273
274	return true;
275	}
276	/}}}/
277	// PM::DepAdd - Add all dependents to the oder list /{{{/
278	// ---------------------------------------------------------------------
279	/* This recursively adds all dependents to the order list */
280	bool pkgPackageManager::DepAdd(pkgOrderList &OList,PkgIterator Pkg,int Depth)
281	{
282	if (OList.IsFlag(Pkg,pkgOrderList::Added) == true)
283	return true;
284	if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
285	return true;
286	if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == false)
287	return false;
288
289
290	// Put the package on the list
291	OList.push_back(Pkg);
292	OList.Flag(Pkg,pkgOrderList::Added);
293	Depth++;
294
295	// Check the dependencies to see if they are all satisfied.
296	bool Bad = false;
297	for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); D.end() == false;)
298	{
b50b2c97	299	if (D->Type != pkgCache::Dep::Depends && D->Type != pkgCache::Dep::PreDepends)
6c139d6e AL	300	{
	301	D++;
	302	continue;
	303	}
	304
	305	// Grok or groups
	306	Bad = true;
	307	for (bool LastOR = true; D.end() == false && LastOR == true; D++)
	308	{
b50b2c97	309	LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
6c139d6e AL	310
	311	if (Bad == false)
	312	continue;
	313
	314	Version **VList = D.AllTargets();
	315	for (Version *I = VList; I != 0 && Bad == true; I++)
	316	{
	317	VerIterator Ver(Cache,*I);
	318	PkgIterator Pkg = Ver.ParentPkg();
	319
	320	// See if the current version is ok
	321	if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true &&
	322	Pkg.State() == PkgIterator::NeedsNothing)
	323	{
	324	Bad = false;
	325	continue;
	326	}
	327
	328	// Not the install version
	329	if (Cache[Pkg].InstallVer != *I \|\|
	330	(Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
	331	continue;
	332	if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == true)
	333	Bad = !DepAdd(OList,Pkg,Depth);
	334	if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
	335	Bad = false;
	336	}
	337	delete [] VList;
	338	}
	339
	340	if (Bad == true)
	341	{
	342	OList.Flag(Pkg,0,pkgOrderList::Added);
	343	OList.pop_back();
	344	Depth--;
	345	return false;
	346	}
	347	}
	348
	349	Depth--;
	350	return true;
	351	}
	352	/}}}/
	353	// PM::EarlyRemove - Perform removal of packages before their time /{{{/
	354	// ---------------------------------------------------------------------
	355	/* This is called to deal with conflicts arising from unpacking */
	356	bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
	357	{
	358	if (List->IsNow(Pkg) == false)
	359	return true;
	360
	361	// Already removed it
	362	if (List->IsFlag(Pkg,pkgOrderList::Removed) == true)
	363	return true;
	364
	365	// Woops, it will not be re-installed!
	366	if (List->IsFlag(Pkg,pkgOrderList::InList) == false)
	367	return false;
9d4c8f67 AL	368
	369	// Essential packages get special treatment
	370	if ((Pkg->Flags & pkgCache::Flag::Essential) != 0)
	371	{
	372	if (_config->FindB("APT::Force-LoopBreak",false) == false)
	373	return _error->Error("This installation run will require temporarily "
	374	"removing the essential package %s due to a "
	375	"Conflicts/Pre-Depends loop. This is often bad, "
	376	"but if you really want to do it, activate the "
	377	"APT::Force-LoopBreak option.",Pkg.Name());
	378	}
6c139d6e AL	379
	380	bool Res = SmartRemove(Pkg);
	381	if (Cache[Pkg].Delete() == false)
	382	List->Flag(Pkg,pkgOrderList::Removed,pkgOrderList::States);
	383
	384	return Res;
	385	}
	386	/}}}/
	387	// PM::SmartRemove - Removal Helper /{{{/
	388	// ---------------------------------------------------------------------
	389	/* */
	390	bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
	391	{
	392	if (List->IsNow(Pkg) == false)
	393	return true;
	394
	395	List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
fc4b5c9f	396	return Remove(Pkg,(Cache[Pkg].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge);
6c139d6e AL	397	}
	398	/}}}/
	399	// PM::SmartUnPack - Install helper /{{{/
	400	// ---------------------------------------------------------------------
	401	/* This performs the task of handling pre-depends. */
	402	bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
	403	{
	404	// Check if it is already unpacked
	405	if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
	406	Cache[Pkg].Keep() == true)
	407	{
	408	List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
	409	if (List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
	410	if (SmartConfigure(Pkg) == false)
	411	return _error->Error("Internal Error, Could not perform immediate configuraton");
	412	return true;
	413	}
981d20eb	414
6c139d6e AL	415	/* See if this packages install version has any predependencies
	416	that are not met by 'now' packages. */
	417	for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList();
421c8d10	418	D.end() == false; )
6c139d6e	419	{
421c8d10 AL	420	// Compute a single dependency element (glob or)
	421	pkgCache::DepIterator Start;
	422	pkgCache::DepIterator End;
	423	D.GlobOr(Start,End);
	424
	425	while (End->Type == pkgCache::Dep::PreDepends)
6c139d6e AL	426	{
6c139d6e AL	427	// Look for possible ok targets.
421c8d10	428	Version **VList = Start.AllTargets();
6c139d6e AL	429	bool Bad = true;
	430	for (Version *I = VList; I != 0 && Bad == true; I++)
	431	{
	432	VerIterator Ver(Cache,*I);
	433	PkgIterator Pkg = Ver.ParentPkg();
	434
	435	// See if the current version is ok
	436	if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true &&
	437	Pkg.State() == PkgIterator::NeedsNothing)
	438	{
	439	Bad = false;
	440	continue;
	441	}
	442	}
	443
	444	// Look for something that could be configured.
	445	for (Version *I = VList; I != 0 && Bad == true; I++)
	446	{
	447	VerIterator Ver(Cache,*I);
	448	PkgIterator Pkg = Ver.ParentPkg();
	449
	450	// Not the install version
	451	if (Cache[Pkg].InstallVer != *I \|\|
	452	(Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
	453	continue;
	454
	455	Bad = !SmartConfigure(Pkg);
	456	}
	457
	458	delete [] VList;
6c139d6e	459
421c8d10 AL	460	/* If this or element did not match then continue on to the
	461	next or element until a matching element is found*/
	462	if (Bad == true)
	463	{
	464	if (Start == End)
	465	return _error->Error("Internal Error, Couldn't configure a pre-depend");
	466	Start++;
	467	}
	468	else
	469	break;
6c139d6e AL	470	}
6c139d6e AL	471
421c8d10	472	if (End->Type == pkgCache::Dep::Conflicts)
6c139d6e AL	473	{
	474	/* Look for conflicts. Two packages that are both in the install
	475	state cannot conflict so we don't check.. */
421c8d10	476	Version **VList = End.AllTargets();
6c139d6e AL	477	for (Version *I = VList; I != 0; I++)
	478	{
	479	VerIterator Ver(Cache,*I);
	480	PkgIterator Pkg = Ver.ParentPkg();
	481
	482	// See if the current version is conflicting
	483	if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true)
	484	{
	485	if (EarlyRemove(Pkg) == false)
	486	return _error->Error("Internal Error, Could not early remove %s",Pkg.Name());
	487	}
	488	}
	489	delete [] VList;
	490	}
	491	}
	492
	493	// Check for reverse conflicts.
	494	CheckRConflicts(Pkg,Pkg.RevDependsList(),
	495	Cache[Pkg].InstVerIter(Cache).VerStr());
	496	for (PrvIterator P = Cache[Pkg].InstVerIter(Cache).ProvidesList();
	497	P.end() == false; P++)
	498	CheckRConflicts(Pkg,P.ParentPkg().RevDependsList(),P.ProvideVersion());
	499
	500	if (Install(Pkg,FileNames[Pkg->ID]) == false)
	501	return false;
	502
	503	List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
	504
	505	// Perform immedate configuration of the package.
	506	if (List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
	507	if (SmartConfigure(Pkg) == false)
	508	return _error->Error("Internal Error, Could not perform immediate configuraton");
	509
	510	return true;
	511	}
	512	/}}}/
	513	// PM::OrderInstall - Installation ordering routine /{{{/
	514	// ---------------------------------------------------------------------
	515	/* */
281daf46	516	pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
6c139d6e	517	{
7a1b1f8b	518	if (CreateOrderList() == false)
281daf46 AL	519	return Failed;
	520
	521	Reset();
6c139d6e	522
30e1eab5 AL	523	if (Debug == true)
30e1eab5 AL	524	clog << "Begining to order" << endl;
6c139d6e	525
281daf46 AL	526	if (List->OrderUnpack(FileNames) == false)
	527	{
	528	_error->Error("Internal ordering error");
	529	return Failed;
	530	}
	531
30e1eab5 AL	532	if (Debug == true)
	533	clog << "Done ordering" << endl;
	534
281daf46	535	bool DoneSomething = false;
6c139d6e AL	536	for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
	537	{
	538	PkgIterator Pkg(Cache,*I);
281daf46 AL	539
	540	if (List->IsNow(Pkg) == false)
	541	{
	542	if (Debug == true)
	543	clog << "Skipping already done " << Pkg.Name() << endl;
	544	continue;
	545	}
	546
2fd65468	547	if (List->IsMissing(Pkg) == true)
281daf46 AL	548	{
	549	if (Debug == true)
	550	clog << "Sequence completed at" << Pkg.Name() << endl;
	551	if (DoneSomething == false)
	552	{
	553	_error->Error("Internal Error, ordering was unable to handle the media swap");
	554	return Failed;
	555	}
	556	return Incomplete;
	557	}
6c139d6e AL	558
6c139d6e AL	559	// Sanity check
d0c59649 AL	560	if (Cache[Pkg].Keep() == true &&
	561	Pkg.State() == pkgCache::PkgIterator::NeedsNothing &&
	562	(Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)
281daf46 AL	563	{
	564	_error->Error("Internal Error, trying to manipulate a kept package");
	565	return Failed;
	566	}
6c139d6e AL	567
	568	// Perform a delete or an install
	569	if (Cache[Pkg].Delete() == true)
	570	{
	571	if (SmartRemove(Pkg) == false)
281daf46	572	return Failed;
6c139d6e AL	573	}
	574	else
	575	if (SmartUnPack(Pkg) == false)
281daf46 AL	576	return Failed;
281daf46 AL	577	DoneSomething = true;
6c139d6e AL	578	}
	579
	580	// Final run through the configure phase
	581	if (ConfigureAll() == false)
281daf46	582	return Failed;
6c139d6e AL	583
	584	// Sanity check
	585	for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
281daf46	586	{
6c139d6e	587	if (List->IsFlag(*I,pkgOrderList::Configured) == false)
281daf46 AL	588	{
	589	_error->Error("Internal error, packages left unconfigured. %s",
	590	PkgIterator(Cache,*I).Name());
	591	return Failed;
	592	}
	593	}
	594
	595	return Completed;
6c139d6e AL	596	}
	597	/}}}/
	598	// PM::DoInstall - Does the installation /{{{/
	599	// ---------------------------------------------------------------------
	600	/* This uses the filenames in FileNames and the information in the
	601	DepCache to perform the installation of packages.*/
281daf46	602	pkgPackageManager::OrderResult pkgPackageManager::DoInstall()
6c139d6e	603	{
281daf46 AL	604	OrderResult Res = OrderInstall();
	605	if (Res != Failed)
	606	if (Go() == false)
	607	return Failed;
	608	return Res;
6c139d6e AL	609	}
6c139d6e AL	610	/}}}/