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 <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 using namespace std;
  33
  34 struct PkgName
  35 {
  36    string Name;
  37    string Ver;
  38    string Arch;
  39    unsigned long Offset;
  40    unsigned long Length;
  41
  42    inline int Compare3(const PkgName &x) const
  43    {
  44       int A = stringcasecmp(Name,x.Name);
  45       if (A == 0)
  46       {
  47          A = stringcasecmp(Ver,x.Ver);
  48          if (A == 0)
  49             A = stringcasecmp(Arch,x.Arch);
  50       }
  51       return A;
  52    }
  53
  54    bool operator <(const PkgName &x) const {return Compare3(x) < 0;};
  55    bool operator >(const PkgName &x) const {return Compare3(x) > 0;};
  56    bool operator ==(const PkgName &x) const {return Compare3(x) == 0;};
  57 };
  58
  59 // DoIt - Sort a single file                                            /*{{{*/
  60 // ---------------------------------------------------------------------
  61 /* */
  62 bool DoIt(string InFile)
  63 {
  64    FileFd Fd(InFile,FileFd::ReadOnly);
  65    pkgTagFile Tags(&Fd);
  66    if (_error->PendingError() == true)
  67       return false;
  68
  69    // Parse.
  70    vector<PkgName> List;
  71    pkgTagSection Section;
  72    unsigned long Largest = 0;
  73    unsigned long Offset = Tags.Offset();
  74    bool Source = _config->FindB("APT::SortPkgs::Source",false);
  75    while (Tags.Step(Section) == true)
  76    {
  77       PkgName Tmp;
  78
  79       /* Fetch the name, auto-detecting if this is a source file or a
  80          package file */
  81       Tmp.Name = Section.FindS("Package");
  82       Tmp.Ver = Section.FindS("Version");
  83       Tmp.Arch = Section.FindS("Architecture");
  84
  85       if (Tmp.Name.empty() == true)
  86          return _error->Error(_("Unknown package record!"));
  87
  88       Tmp.Offset = Offset;
  89       Tmp.Length = Section.size();
  90       if (Largest < Tmp.Length)
  91          Largest = Tmp.Length;
  92
  93       List.push_back(Tmp);
  94
  95       Offset = Tags.Offset();
  96    }
  97    if (_error->PendingError() == true)
  98       return false;
  99
 100    // Sort it
 101    sort(List.begin(),List.end());
 102
 103    const char **Order = TFRewritePackageOrder;
 104    if (Source == true)
 105       Order = TFRewriteSourceOrder;
 106
 107    // Emit
 108    unsigned char *Buffer = new unsigned char[Largest+1];
 109    for (vector<PkgName>::iterator I = List.begin(); I != List.end(); I++)
 110    {
 111       // Read in the Record.
 112       if (Fd.Seek(I->Offset) == false || Fd.Read(Buffer,I->Length) == false)
 113       {
 114          delete [] Buffer;
 115          return false;
 116       }
 117
 118       Buffer[I->Length] = '\n';
 119       if (Section.Scan((char *)Buffer,I->Length+1) == false)
 120       {
 121          delete [] Buffer;
 122          return _error->Error("Internal error, failed to scan buffer");
 123       }
 124
 125       // Sort the section
 126       if (TFRewrite(stdout,Section,Order,0) == false)
 127       {
 128          delete [] Buffer;
 129          return _error->Error("Internal error, failed to sort fields");
 130       }
 131
 132       fputc('\n',stdout);
 133    }
 134
 135    delete [] Buffer;
 136    return true;
 137 }
 138                                                                         /*}}}*/
 139 // ShowHelp - Show the help text                                        /*{{{*/
 140 // ---------------------------------------------------------------------
 141 /* */
 142 int ShowHelp()
 143 {
 144    ioprintf(cout,_("%s %s for %s %s compiled on %s %s\n"),PACKAGE,VERSION,
 145             COMMON_OS,COMMON_CPU,__DATE__,__TIME__);
 146    if (_config->FindB("version") == true)
 147       return 0;
 148
 149    cout <<
 150     _("Usage: apt-sortpkgs [options] file1 [file2 ...]\n"
 151       "\n"
 152       "apt-sortpkgs is a simple tool to sort package files. The -s option is used\n"
 153       "to indicate what kind of file it is.\n"
 154       "\n"
 155       "Options:\n"
 156       "  -h   This help text\n"
 157       "  -s   Use source file sorting\n"
 158       "  -c=? Read this configuration file\n"
 159       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
 160
 161    return 0;
 162 }
 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 }