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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	#ifdef __GNUG__
	16	#pragma implementation "apt-pkg/cachefile.h"
	17	#endif
	18
	19	#include <apt-pkg/cachefile.h>
	20	#include <apt-pkg/error.h>
	21	#include <apt-pkg/sourcelist.h>
	22	#include <apt-pkg/pkgcachegen.h>
	23	#include <apt-pkg/configuration.h>
	24	#include <apt-pkg/policy.h>
	25	#include <apt-pkg/pkgsystem.h>
	26
	27	#include <apti18n.h>
	28	/}}}/
	29
	30	// CacheFile::CacheFile - Constructor /{{{/
	31	// ---------------------------------------------------------------------
	32	/* */
	33	pkgCacheFile::pkgCacheFile() : Map(0), Cache(0), DCache(0), Policy(0)
	34	{
	35	}
	36	/}}}/
	37	// CacheFile::~CacheFile - Destructor /{{{/
	38	// ---------------------------------------------------------------------
	39	/* */
	40	pkgCacheFile::~pkgCacheFile()
	41	{
	42	delete DCache;
	43	delete Policy;
	44	delete Cache;
	45	delete Map;
	46	_system->UnLock(true);
	47	}
	48	/}}}/
	49	// CacheFile::BuildCaches - Open and build the cache files /{{{/
	50	// ---------------------------------------------------------------------
	51	/* */
	52	bool pkgCacheFile::BuildCaches(OpProgress &Progress,bool WithLock)
	53	{
	54	if (WithLock == true)
	55	if (_system->Lock() == false)
	56	return false;
	57
	58	if (_config->FindB("Debug::NoLocking",false) == true)
	59	WithLock = false;
	60
	61	if (_error->PendingError() == true)
	62	return false;
	63
	64	// Read the source list
	65	pkgSourceList List;
	66	if (List.ReadMainList() == false)
	67	return _error->Error(_("The list of sources could not be read."));
	68
	69	// Read the caches
	70	bool Res = pkgMakeStatusCache(List,Progress,&Map,!WithLock);
	71	Progress.Done();
	72	if (Res == false)
	73	return _error->Error(_("The package lists or status file could not be parsed or opened."));
	74
	75	/* This sux, remove it someday */
	76	if (_error->empty() == false)
	77	_error->Warning(_("You may want to run apt-get update to correct these problems"));
	78
	79	Cache = new pkgCache(Map);
	80	if (_error->PendingError() == true)
	81	return false;
	82	return true;
	83	}
	84	/}}}/
	85	// CacheFile::Open - Open the cache files, creating if necessary /{{{/
	86	// ---------------------------------------------------------------------
	87	/* */
	88	bool pkgCacheFile::Open(OpProgress &Progress,bool WithLock)
	89	{
	90	if (BuildCaches(Progress,WithLock) == false)
	91	return false;
	92
	93	// The policy engine
	94	Policy = new pkgPolicy(Cache);
	95	if (_error->PendingError() == true)
	96	return false;
	97	if (ReadPinFile(*Policy) == false)
	98	return false;
	99
	100	// Create the dependency cache
	101	DCache = new pkgDepCache(Cache,Policy);
	102	if (_error->PendingError() == true)
	103	return false;
	104
	105	DCache->Init(&Progress);
	106	Progress.Done();
	107	if (_error->PendingError() == true)
	108	return false;
	109
	110	return true;
	111	}
	112	/}}}/
	113
	114	// CacheFile::Close - close the cache files /{{{/
	115	// ---------------------------------------------------------------------
	116	/* */
	117	void pkgCacheFile::Close()
	118	{
	119	delete DCache;
	120	delete Policy;
	121	delete Cache;
	122	delete Map;
	123	_system->UnLock(true);
	124
	125	Map = 0;
	126	DCache = 0;
	127	Policy = 0;
	128	Cache = 0;
	129	}
	130	/}}}/