cmdline/apt-sortpkgs.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-sortpkgs.cc,v 1.5 2003/01/11 07:18:44 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 <config.h>
  16
  17 #include <apt-pkg/tagfile.h>
  18 #include <apt-pkg/error.h>
  19 #include <apt-pkg/configuration.h>
  20 #include <apt-pkg/cmndline.h>
  21 #include <apt-pkg/init.h>
  22 #include <apt-pkg/strutl.h>
  23
  24 #include <vector>
  25 #include <algorithm>
  26
  27 #include <locale.h>
  28 #include <unistd.h>
  29
  30 #include <apti18n.h>
  31                                                                         /*}}}*/
  32
  33 using namespace std;
  34
  35 struct PkgName                                                          /*{{{*/
  36 {
  37    string Name;
  38    string Ver;
  39    string Arch;
  40    unsigned long Offset;
  41    unsigned long Length;
  42
  43    inline int Compare3(const PkgName &x) const
  44    {
  45       int A = stringcasecmp(Name,x.Name);
  46       if (A == 0)
  47       {
  48          A = stringcasecmp(Ver,x.Ver);
  49          if (A == 0)
  50             A = stringcasecmp(Arch,x.Arch);
  51       }
  52       return A;
  53    }
  54
  55    bool operator <(const PkgName &x) const {return Compare3(x) < 0;};
  56    bool operator >(const PkgName &x) const {return Compare3(x) > 0;};
  57    bool operator ==(const PkgName &x) const {return Compare3(x) == 0;};
  58 };
  59                                                                         /*}}}*/
  60 // DoIt - Sort a single file                                            /*{{{*/
  61 // ---------------------------------------------------------------------
  62 /* */
  63 bool DoIt(string InFile)
  64 {
  65    FileFd Fd(InFile,FileFd::ReadOnly);
  66    pkgTagFile Tags(&Fd);
  67    if (_error->PendingError() == true)
  68       return false;
  69
  70    // Parse.
  71    vector<PkgName> List;
  72    pkgTagSection Section;
  73    unsigned long Largest = 0;
  74    unsigned long Offset = Tags.Offset();
  75    bool Source = _config->FindB("APT::SortPkgs::Source",false);
  76    while (Tags.Step(Section) == true)
  77    {
  78       PkgName Tmp;
  79
  80       /* Fetch the name, auto-detecting if this is a source file or a
  81          package file */
  82       Tmp.Name = Section.FindS("Package");
  83       Tmp.Ver = Section.FindS("Version");
  84       Tmp.Arch = Section.FindS("Architecture");
  85
  86       if (Tmp.Name.empty() == true)
  87          return _error->Error(_("Unknown package record!"));
  88
  89       Tmp.Offset = Offset;
  90       Tmp.Length = Section.size();
  91       if (Largest < Tmp.Length)
  92          Largest = Tmp.Length;
  93
  94       List.push_back(Tmp);
  95
  96       Offset = Tags.Offset();
  97    }
  98    if (_error->PendingError() == true)
  99       return false;
 100
 101    // Sort it
 102    sort(List.begin(),List.end());
 103
 104    const char **Order = TFRewritePackageOrder;
 105    if (Source == true)
 106       Order = TFRewriteSourceOrder;
 107
 108    // Emit
 109    unsigned char *Buffer = new unsigned char[Largest+1];
 110    for (vector<PkgName>::iterator I = List.begin(); I != List.end(); I++)
 111    {
 112       // Read in the Record.
 113       if (Fd.Seek(I->Offset) == false || Fd.Read(Buffer,I->Length) == false)
 114       {
 115          delete [] Buffer;
 116          return false;
 117       }
 118
 119       Buffer[I->Length] = '\n';
 120       if (Section.Scan((char *)Buffer,I->Length+1) == false)
 121       {
 122          delete [] Buffer;
 123          return _error->Error("Internal error, failed to scan buffer");
 124       }
 125
 126       // Sort the section
 127       if (TFRewrite(stdout,Section,Order,0) == false)
 128       {
 129          delete [] Buffer;
 130          return _error->Error("Internal error, failed to sort fields");
 131       }
 132
 133       fputc('\n',stdout);
 134    }
 135
 136    delete [] Buffer;
 137    return true;
 138 }
 139                                                                         /*}}}*/
 140 // ShowHelp - Show the help text                                        /*{{{*/
 141 // ---------------------------------------------------------------------
 142 /* */
 143 int ShowHelp()
 144 {
 145    ioprintf(cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,VERSION,
 146             COMMON_ARCH,__DATE__,__TIME__);
 147    if (_config->FindB("version") == true)
 148       return 0;
 149
 150    cout <<
 151     _("Usage: apt-sortpkgs [options] file1 [file2 ...]\n"
 152       "\n"
 153       "apt-sortpkgs is a simple tool to sort package files. The -s option is used\n"
 154       "to indicate what kind of file it is.\n"
 155       "\n"
 156       "Options:\n"
 157       "  -h   This help text\n"
 158       "  -s   Use source file sorting\n"
 159       "  -c=? Read this configuration file\n"
 160       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
 161
 162    return 0;
 163 }
 164                                                                         /*}}}*/
 165 int main(int argc,const char *argv[])                                   /*{{{*/
 166 {
 167    CommandLine::Args Args[] = {
 168       {'h',"help","help",0},
 169       {'v',"version","version",0},
 170       {'s',"source","APT::SortPkgs::Source",0},
 171       {'c',"config-file",0,CommandLine::ConfigFile},
 172       {'o',"option",0,CommandLine::ArbItem},
 173       {0,0,0,0}};
 174
 175    // Set up gettext support
 176    setlocale(LC_ALL,"");
 177    textdomain(PACKAGE);
 178
 179    // Parse the command line and initialize the package library
 180    CommandLine CmdL(Args,_config);
 181    if (pkgInitConfig(*_config) == false ||
 182        CmdL.Parse(argc,argv) == false ||
 183        pkgInitSystem(*_config,_system) == false)
 184    {
 185       _error->DumpErrors();
 186       return 100;
 187    }
 188
 189    // See if the help should be shown
 190    if (_config->FindB("help") == true ||
 191        CmdL.FileSize() == 0)
 192       return ShowHelp();
 193
 194    // Match the operation
 195    for (unsigned int I = 0; I != CmdL.FileSize(); I++)
 196       if (DoIt(CmdL.FileList[I]) == false)
 197          break;
 198
 199    // Print any errors or warnings found during parsing
 200    if (_error->empty() == false)
 201    {
 202       bool Errors = _error->PendingError();
 203       _error->DumpErrors();
 204       return Errors == true?100:0;
 205    }
 206
 207    return 0;
 208 }
 209                                                                         /*}}}*/