cmdline/apt-sortpkgs.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-sortpkgs.cc,v 1.4 2002/02/15 03:40:00 jgg Exp $
   4 /* ######################################################################
   5
   6    APT Sort Packages - Program to sort Package and Source files
   7
   8    This program is quite simple, it just sorts the package files by
   9    package and sorts the fields inside by the internal APT sort order.
  10    Input is taken from a named file and sent to stdout.
  11
  12    ##################################################################### */
  13                                                                         /*}}}*/
  14 // Include Files                                                        /*{{{*/
  15 #include <apt-pkg/tagfile.h>
  16 #include <apt-pkg/error.h>
  17 #include <apt-pkg/configuration.h>
  18 #include <apt-pkg/cmndline.h>
  19 #include <apt-pkg/init.h>
  20 #include <apt-pkg/strutl.h>
  21
  22 #include <config.h>
  23 #include <apti18n.h>
  24
  25 #include <vector>
  26 #include <algorithm>
  27
  28 #include <locale.h>
  29 #include <unistd.h>
  30                                                                         /*}}}*/
  31
  32 struct PkgName
  33 {
  34    string Name;
  35    string Ver;
  36    string Arch;
  37    unsigned long Offset;
  38    unsigned long Length;
  39
  40    inline int Compare3(const PkgName &x) const
  41    {
  42       int A = stringcasecmp(Name,x.Name);
  43       if (A == 0)
  44       {
  45          A = stringcasecmp(Ver,x.Ver);
  46          if (A == 0)
  47             A = stringcasecmp(Arch,x.Arch);
  48       }
  49       return A;
  50    }
  51
  52    bool operator <(const PkgName &x) const {return Compare3(x) < 0;};
  53    bool operator >(const PkgName &x) const {return Compare3(x) > 0;};
  54    bool operator ==(const PkgName &x) const {return Compare3(x) == 0;};
  55 };
  56
  57 // DoIt - Sort a single file                                            /*{{{*/
  58 // ---------------------------------------------------------------------
  59 /* */
  60 bool DoIt(string InFile)
  61 {
  62    FileFd Fd(InFile,FileFd::ReadOnly);
  63    pkgTagFile Tags(&Fd);
  64    if (_error->PendingError() == true)
  65       return false;
  66
  67    // Parse.
  68    vector<PkgName> List;
  69    pkgTagSection Section;
  70    unsigned long Largest = 0;
  71    unsigned long Offset = Tags.Offset();
  72    bool Source = _config->FindB("APT::SortPkgs::Source",false);
  73    while (Tags.Step(Section) == true)
  74    {
  75       PkgName Tmp;
  76
  77       /* Fetch the name, auto-detecting if this is a source file or a
  78          package file */
  79       Tmp.Name = Section.FindS("Package");
  80       Tmp.Ver = Section.FindS("Version");
  81       Tmp.Arch = Section.FindS("Architecture");
  82
  83       if (Tmp.Name.empty() == true)
  84          return _error->Error(_("Unknown package record!"));
  85
  86       Tmp.Offset = Offset;
  87       Tmp.Length = Section.size();
  88       if (Largest < Tmp.Length)
  89          Largest = Tmp.Length;
  90
  91       List.push_back(Tmp);
  92
  93       Offset = Tags.Offset();
  94    }
  95    if (_error->PendingError() == true)
  96       return false;
  97
  98    // Sort it
  99    sort(List.begin(),List.end());
 100
 101    const char **Order = TFRewritePackageOrder;
 102    if (Source == true)
 103       Order = TFRewriteSourceOrder;
 104
 105    // Emit
 106    unsigned char *Buffer = new unsigned char[Largest+1];
 107    for (vector<PkgName>::iterator I = List.begin(); I != List.end(); I++)
 108    {
 109       // Read in the Record.
 110       if (Fd.Seek(I->Offset) == false || Fd.Read(Buffer,I->Length) == false)
 111       {
 112          delete [] Buffer;
 113          return false;
 114       }
 115
 116       Buffer[I->Length] = '\n';
 117       if (Section.Scan((char *)Buffer,I->Length+1) == false)
 118       {
 119          delete [] Buffer;
 120          return _error->Error("Internal error, failed to scan buffer");
 121       }
 122
 123       // Sort the section
 124       if (TFRewrite(stdout,Section,Order,0) == false)
 125       {
 126          delete [] Buffer;
 127          return _error->Error("Internal error, failed to sort fields");
 128       }
 129
 130       fputc('\n',stdout);
 131    }
 132
 133    delete [] Buffer;
 134    return true;
 135 }
 136                                                                         /*}}}*/
 137 // ShowHelp - Show the help text                                        /*{{{*/
 138 // ---------------------------------------------------------------------
 139 /* */
 140 int ShowHelp()
 141 {
 142    ioprintf(cout,_("%s %s for %s %s compiled on %s %s\n"),PACKAGE,VERSION,
 143             COMMON_OS,COMMON_CPU,__DATE__,__TIME__);
 144    if (_config->FindB("version") == true)
 145       return 0;
 146
 147    cout <<
 148     _("Usage: apt-sortpkgs [options] file1 [file2 ...]\n"
 149       "\n"
 150       "apt-sortpkgs is a simple tool to sort package files. The -s option is used\n"
 151       "to indicate what kind of file it is.\n"
 152       "\n"
 153       "Options:\n"
 154       "  -h   This help text\n"
 155       "  -s   Use source file sorting\n"
 156       "  -c=? Read this configuration file\n"
 157       "  -o=? Set an arbitary configuration option, eg -o dir::cache=/tmp\n");
 158
 159    return 0;
 160 }
 161                                                                         /*}}}*/
 162
 163 int main(unsigned int argc,const char *argv[])
 164 {
 165    CommandLine::Args Args[] = {
 166       {'h',"help","help",0},
 167       {'v',"version","version",0},
 168       {'s',"source","APT::SortPkgs::Source",0},
 169       {'c',"config-file",0,CommandLine::ConfigFile},
 170       {'o',"option",0,CommandLine::ArbItem},
 171       {0,0,0,0}};
 172
 173    // Set up gettext support
 174    setlocale(LC_ALL,"");
 175    textdomain(PACKAGE);
 176
 177    // Parse the command line and initialize the package library
 178    CommandLine CmdL(Args,_config);
 179    if (pkgInitConfig(*_config) == false ||
 180        CmdL.Parse(argc,argv) == false ||
 181        pkgInitSystem(*_config,_system) == false)
 182    {
 183       _error->DumpErrors();
 184       return 100;
 185    }
 186
 187    // See if the help should be shown
 188    if (_config->FindB("help") == true ||
 189        CmdL.FileSize() == 0)
 190       return ShowHelp();
 191
 192    // Match the operation
 193    for (unsigned int I = 0; I != CmdL.FileSize(); I++)
 194       if (DoIt(CmdL.FileList[I]) == false)
 195          break;
 196
 197    // Print any errors or warnings found during parsing
 198    if (_error->empty() == false)
 199    {
 200       bool Errors = _error->PendingError();
 201       _error->DumpErrors();
 202       return Errors == true?100:0;
 203    }
 204
 205    return 0;
 206 }