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