apt @VERSION@

packagemanager.h

00001 // -*- mode: cpp; mode: fold -*-
00002 // Description                                                          /*{{{*/
00003 // $Id: packagemanager.h,v 1.14 2001/05/07 04:24:08 jgg Exp $
00004 /* ######################################################################
00005 
00006    Package Manager - Abstacts the package manager
00007 
00008    Three steps are 
00009      - Aquiration of archives (stores the list of final file names)
00010      - Sorting of operations
00011      - Invokation of package manager
00012    
00013    This is the final stage when the package cache entities get converted
00014    into file names and the state stored in a DepCache is transformed
00015    into a series of operations.
00016 
00017    In the final scheme of things this may serve as a director class to
00018    access the actual install methods based on the file type being
00019    installed.
00020    
00021    ##################################################################### */
00022                                                                         /*}}}*/
00023 #ifndef PKGLIB_PACKAGEMANAGER_H
00024 #define PKGLIB_PACKAGEMANAGER_H
00025 
00026 
00027 #include <string>
00028 #include <iostream>
00029 #include <apt-pkg/pkgcache.h>
00030 #include <apt-pkg/depcache.h>
00031 #include <set>
00032 
00033 using std::string;
00034 
00035 class pkgAcquire;
00036 class pkgDepCache;
00037 class pkgSourceList;
00038 class pkgOrderList;
00039 class pkgRecords;
00040 class pkgPackageManager : protected pkgCache::Namespace
00041 {
00042    public:
00043    
00044    enum OrderResult {Completed,Failed,Incomplete};
00045    
00046    protected:
00047    string *FileNames;
00048    pkgDepCache &Cache;
00049    pkgOrderList *List;
00050    bool Debug;
00051 
00058    std::set<std::string> disappearedPkgs;
00059 
00060    bool DepAdd(pkgOrderList &Order,PkgIterator P,int Depth = 0);
00061    void ImmediateAdd(PkgIterator P, bool UseInstallVer, unsigned const int &Depth = 0);
00062    virtual OrderResult OrderInstall();
00063    bool CheckRConflicts(PkgIterator Pkg,DepIterator Dep,const char *Ver);
00064    bool CreateOrderList();
00065    
00066    // Analysis helpers
00067    bool DepAlwaysTrue(DepIterator D);
00068    
00069    // Install helpers
00070    bool ConfigureAll();
00071    bool SmartConfigure(PkgIterator Pkg);
00072    bool SmartUnPack(PkgIterator Pkg);
00073    bool SmartRemove(PkgIterator Pkg);
00074    bool EarlyRemove(PkgIterator Pkg);   
00075    
00076    // The Actual installation implementation
00077    virtual bool Install(PkgIterator /*Pkg*/,string /*File*/) {return false;};
00078    virtual bool Configure(PkgIterator /*Pkg*/) {return false;};
00079    virtual bool Remove(PkgIterator /*Pkg*/,bool /*Purge*/=false) {return false;};
00080    virtual bool Go(int statusFd=-1) {return true;};
00081    virtual void Reset() {};
00082 
00083    // the result of the operation
00084    OrderResult Res;
00085 
00086    public:
00087       
00088    // Main action members
00089    bool GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
00090                     pkgRecords *Recs);
00091 
00092    // Do the installation 
00093    OrderResult DoInstall(int statusFd=-1);
00094 
00095    // stuff that needs to be done before the fork() of a library that
00096    // uses apt
00097    OrderResult DoInstallPreFork() {
00098       Res = OrderInstall();
00099       return Res;
00100    };
00101 
00102    // stuff that needs to be done after the fork
00103    OrderResult DoInstallPostFork(int statusFd=-1);
00104    bool FixMissing();
00105 
00107    inline std::set<std::string> GetDisappearedPackages() { return disappearedPkgs; };
00108 
00109    pkgPackageManager(pkgDepCache *Cache);
00110    virtual ~pkgPackageManager();
00111 };
00112 
00113 #endif