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Commit	Line	Data
	1	// -- mode: cpp; mode: fold --
	2	// Description /{{{/
	3	// $Id: cachefile.cc,v 1.8 2002/04/27 04:28:04 jgg Exp $
	4	/* ######################################################################
	5
	6	CacheFile - Simple wrapper class for opening, generating and whatnot
	7
	8	This class implements a simple 2 line mechanism to open various sorts
	9	of caches. It can operate as root, as not root, show progress and so on,
	10	it transparently handles everything necessary.
	11
	12	##################################################################### */
	13	/}}}/
	14	// Include Files /{{{/
	15	#include <apt-pkg/cachefile.h>
	16	#include <apt-pkg/error.h>
	17	#include <apt-pkg/sourcelist.h>
	18	#include <apt-pkg/pkgcachegen.h>
	19	#include <apt-pkg/configuration.h>
	20	#include <apt-pkg/policy.h>
	21	#include <apt-pkg/pkgsystem.h>
	22	#include <apt-pkg/acquire-item.h>
	23	#include <apt-pkg/fileutl.h>
	24
	25	#include <apti18n.h>
	26	/}}}/
	27	// CacheFile::CacheFile - Constructor /{{{/
	28	// ---------------------------------------------------------------------
	29	/* */
	30	pkgCacheFile::pkgCacheFile() : Map(0), Cache(0), DCache(0), Policy(0)
	31	{
	32	}
	33	/}}}/
	34	// CacheFile::~CacheFile - Destructor /{{{/
	35	// ---------------------------------------------------------------------
	36	/* */
	37	pkgCacheFile::~pkgCacheFile()
	38	{
	39	delete DCache;
	40	delete Policy;
	41	delete Cache;
	42	delete Map;
	43	_system->UnLock(true);
	44	}
	45	/}}}/
	46	// CacheFile::BuildCaches - Open and build the cache files /{{{/
	47	// ---------------------------------------------------------------------
	48	/* */
	49	bool pkgCacheFile::BuildCaches(OpProgress &Progress,bool WithLock)
	50	{
	51	const bool ErrorWasEmpty = _error->empty();
	52	if (WithLock == true)
	53	if (_system->Lock() == false)
	54	return false;
	55
	56	if (_config->FindB("Debug::NoLocking",false) == true)
	57	WithLock = false;
	58
	59	if (_error->PendingError() == true)
	60	return false;
	61
	62	// Read the source list
	63	pkgSourceList List;
	64	if (List.ReadMainList() == false)
	65	return _error->Error(_("The list of sources could not be read."));
	66
	67	// Read the caches
	68	bool Res = pkgMakeStatusCache(List,Progress,&Map,!WithLock);
	69	Progress.Done();
	70	if (Res == false)
	71	return _error->Error(_("The package lists or status file could not be parsed or opened."));
	72
	73	/* This sux, remove it someday */
	74	if (ErrorWasEmpty == true && _error->empty() == false)
	75	_error->Warning(_("You may want to run apt-get update to correct these problems"));
	76
	77	Cache = new pkgCache(Map);
	78	if (_error->PendingError() == true)
	79	return false;
	80	return true;
	81	}
	82	/}}}/
	83	// CacheFile::Open - Open the cache files, creating if necessary /{{{/
	84	// ---------------------------------------------------------------------
	85	/* */
	86	bool pkgCacheFile::Open(OpProgress &Progress,bool WithLock)
	87	{
	88	if (BuildCaches(Progress,WithLock) == false)
	89	return false;
	90
	91	// The policy engine
	92	Policy = new pkgPolicy(Cache);
	93	if (_error->PendingError() == true)
	94	return false;
	95
	96	if (ReadPinFile(Policy) == false \|\| ReadPinDir(Policy) == false)
	97	return false;
	98
	99	// Create the dependency cache
	100	DCache = new pkgDepCache(Cache,Policy);
	101	if (_error->PendingError() == true)
	102	return false;
	103
	104	DCache->Init(&Progress);
	105	Progress.Done();
	106	if (_error->PendingError() == true)
	107	return false;
	108
	109	return true;
	110	}
	111	/}}}/
	112	// CacheFile::Close - close the cache files /{{{/
	113	// ---------------------------------------------------------------------
	114	/* */
	115	void pkgCacheFile::Close()
	116	{
	117	delete DCache;
	118	delete Policy;
	119	delete Cache;
	120	delete Map;
	121	_system->UnLock(true);
	122
	123	Map = 0;
	124	DCache = 0;
	125	Policy = 0;
	126	Cache = 0;
	127	}
	128	/}}}/