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
  32 using std::string;
  33
  34 class pkgAcquire;
  35 class pkgDepCache;
  36 class pkgSourceList;
  37 class pkgOrderList;
  38 class pkgRecords;
  39 class pkgPackageManager : protected pkgCache::Namespace
  40 {
  41    public:
  42
  43    enum OrderResult {Completed,Failed,Incomplete};
  44
  45    protected:
  46    string *FileNames;
  47    pkgDepCache &Cache;
  48    pkgOrderList *List;
  49    bool Debug;
  50
  51    bool DepAdd(pkgOrderList &Order,PkgIterator P,int Depth = 0);
  52    void ImmediateAdd(PkgIterator P, bool UseInstallVer);
  53    virtual OrderResult OrderInstall();
  54    bool CheckRConflicts(PkgIterator Pkg,DepIterator Dep,const char *Ver);
  55    bool CreateOrderList();
  56
  57    // Analysis helpers
  58    bool DepAlwaysTrue(DepIterator D);
  59
  60    // Install helpers
  61    bool ConfigureAll();
  62    bool SmartConfigure(PkgIterator Pkg);
  63    bool SmartUnPack(PkgIterator Pkg);
  64    bool SmartRemove(PkgIterator Pkg);
  65    bool EarlyRemove(PkgIterator Pkg);
  66
  67    // The Actual installation implementation
  68    virtual bool Install(PkgIterator /*Pkg*/,string /*File*/) {return false;};
  69    virtual bool Configure(PkgIterator /*Pkg*/) {return false;};
  70    virtual bool Remove(PkgIterator /*Pkg*/,bool /*Purge*/=false) {return false;};
  71    virtual bool Go(int statusFd=-1) {return true;};
  72    virtual void Reset() {};
  73
  74    // the result of the operation
  75    OrderResult Res;
  76
  77    public:
  78
  79    // Main action members
  80    bool GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
  81                     pkgRecords *Recs);
  82
  83    // Do the installation
  84    OrderResult DoInstall(int statusFd=-1);
  85
  86    // stuff that needs to be done before the fork() of a library that
  87    // uses apt
  88    OrderResult DoInstallPreFork() {
  89       Res = OrderInstall();
  90       return Res;
  91    };
  92
  93    // stuff that needs to be done after the fork
  94    OrderResult DoInstallPostFork(int statusFd=-1);
  95    bool FixMissing();
  96
  97    pkgPackageManager(pkgDepCache *Cache);
  98    virtual ~pkgPackageManager();
  99 };
 100
 101 #endif