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    virtual OrderResult OrderInstall();
  53    bool CheckRConflicts(PkgIterator Pkg,DepIterator Dep,const char *Ver);
  54    bool CreateOrderList();
  55
  56    // Analysis helpers
  57    bool DepAlwaysTrue(DepIterator D);
  58
  59    // Install helpers
  60    bool ConfigureAll();
  61    bool SmartConfigure(PkgIterator Pkg);
  62    bool SmartUnPack(PkgIterator Pkg);
  63    bool SmartRemove(PkgIterator Pkg);
  64    bool EarlyRemove(PkgIterator Pkg);
  65
  66    // The Actual installation implementation
  67    virtual bool Install(PkgIterator /*Pkg*/,string /*File*/) {return false;};
  68    virtual bool Configure(PkgIterator /*Pkg*/) {return false;};
  69    virtual bool Remove(PkgIterator /*Pkg*/,bool /*Purge*/=false) {return false;};
  70    virtual bool Go(int statusFd=-1) {return true;};
  71    virtual void Reset() {};
  72
  73    // the result of the operation
  74    OrderResult Res;
  75
  76    public:
  77
  78    // Main action members
  79    bool GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
  80                     pkgRecords *Recs);
  81
  82    // Do the installation
  83    OrderResult DoInstall(int statusFd=-1);
  84
  85    // stuff that needs to be done before the fork() of a library that
  86    // uses apt
  87    OrderResult DoInstallPreFork() {
  88       Res = OrderInstall();
  89       return Res;
  90    };
  91
  92    // stuff that needs to be done after the fork
  93    OrderResult DoInstallPostFork(int statusFd=-1) {
  94       bool goResult = Go(statusFd);
  95       if(goResult == false)
  96          return Failed;
  97
  98       // if all was fine update the state file
  99       if(Res == Completed) {
 100          Cache.writeStateFile(NULL);
 101       }
 102       return Res;
 103    };
 104
 105    bool FixMissing();
 106
 107    pkgPackageManager(pkgDepCache *Cache);
 108    virtual ~pkgPackageManager();
 109 };
 110
 111 #endif