apt-pkg/packagemanager.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: packagemanager.h,v 1.14 2001/05/07 04:24:08 jgg Exp $
   4 /* ######################################################################
   5
   6    Package Manager - Abstacts the package manager
   7
   8    Three steps are
   9      - Aquiration of archives (stores the list of final file names)
  10      - Sorting of operations
  11      - Invokation of package manager
  12
  13    This is the final stage when the package cache entities get converted
  14    into file names and the state stored in a DepCache is transformed
  15    into a series of operations.
  16
  17    In the final scheme of things this may serve as a director class to
  18    access the actual install methods based on the file type being
  19    installed.
  20
  21    ##################################################################### */
  22                                                                         /*}}}*/
  23 #ifndef PKGLIB_PACKAGEMANAGER_H
  24 #define PKGLIB_PACKAGEMANAGER_H
  25
  26
  27 #include <string>
  28 #include <iostream>
  29 #include <apt-pkg/pkgcache.h>
  30 #include <apt-pkg/depcache.h>
  31 #include <set>
  32
  33 using std::string;
  34
  35 class pkgAcquire;
  36 class pkgDepCache;
  37 class pkgSourceList;
  38 class pkgOrderList;
  39 class pkgRecords;
  40 class pkgPackageManager : protected pkgCache::Namespace
  41 {
  42    public:
  43
  44    enum OrderResult {Completed,Failed,Incomplete};
  45
  46    protected:
  47    string *FileNames;
  48    pkgDepCache &Cache;
  49    pkgOrderList *List;
  50    bool Debug;
  51
  52    /** \brief saves packages dpkg let disappear
  53
  54        This way APT can retreat from trying to configure these
  55        packages later on and a frontend can choose to display a
  56        notice to inform the user about these disappears.
  57    */
  58    std::set<std::string> disappearedPkgs;
  59
  60    bool DepAdd(pkgOrderList &Order,PkgIterator P,int Depth = 0);
  61    void ImmediateAdd(PkgIterator P, bool UseInstallVer, unsigned const int &Depth = 0);
  62    virtual OrderResult OrderInstall();
  63    bool CheckRConflicts(PkgIterator Pkg,DepIterator Dep,const char *Ver);
  64    bool CreateOrderList();
  65
  66    // Analysis helpers
  67    bool DepAlwaysTrue(DepIterator D);
  68
  69    // Install helpers
  70    bool ConfigureAll();
  71    bool SmartConfigure(PkgIterator Pkg);
  72    bool SmartUnPack(PkgIterator Pkg);
  73    bool SmartRemove(PkgIterator Pkg);
  74    bool EarlyRemove(PkgIterator Pkg);
  75
  76    // The Actual installation implementation
  77    virtual bool Install(PkgIterator /*Pkg*/,string /*File*/) {return false;};
  78    virtual bool Configure(PkgIterator /*Pkg*/) {return false;};
  79    virtual bool Remove(PkgIterator /*Pkg*/,bool /*Purge*/=false) {return false;};
  80    virtual bool Go(int statusFd=-1) {return true;};
  81    virtual void Reset() {};
  82
  83    // the result of the operation
  84    OrderResult Res;
  85
  86    public:
  87
  88    // Main action members
  89    bool GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
  90                     pkgRecords *Recs);
  91
  92    // Do the installation
  93    OrderResult DoInstall(int statusFd=-1);
  94
  95    // stuff that needs to be done before the fork() of a library that
  96    // uses apt
  97    OrderResult DoInstallPreFork() {
  98       Res = OrderInstall();
  99       return Res;
 100    };
 101
 102    // stuff that needs to be done after the fork
 103    OrderResult DoInstallPostFork(int statusFd=-1);
 104    bool FixMissing();
 105
 106    /** \brief returns all packages dpkg let disappear */
 107    inline std::set<std::string> GetDisappearedPackages() { return disappearedPkgs; };
 108
 109    pkgPackageManager(pkgDepCache *Cache);
 110    virtual ~pkgPackageManager();
 111 };
 112
 113 #endif