summaryrefslogtreecommitdiff
path: root/cmdline/apt-sortpkgs.cc
blob: f9aa7d728a7f8b5eeef8157b43dd13f0930a4593 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: apt-sortpkgs.cc,v 1.5 2003/01/11 07:18:44 jgg Exp $
/* ######################################################################
   
   APT Sort Packages - Program to sort Package and Source files

   This program is quite simple, it just sorts the package files by
   package and sorts the fields inside by the internal APT sort order.
   Input is taken from a named file and sent to stdout.
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/tagfile.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/init.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/pkgsystem.h>

#include <apt-private/private-cmndline.h>
#include <apt-private/private-main.h>

#include <vector>
#include <algorithm>
#include <stdio.h>
#include <iostream>
#include <string>
#include <memory>

#include <apti18n.h>
									/*}}}*/

using namespace std;

struct PkgName								/*{{{*/
{
   string Name;
   string Ver;
   string Arch;
   unsigned long Offset;
   unsigned long Length;
   
   inline int Compare3(const PkgName &x) const
   {
      int A = stringcasecmp(Name,x.Name);
      if (A == 0)
      {
	 A = stringcasecmp(Ver,x.Ver);
	 if (A == 0)
	    A = stringcasecmp(Arch,x.Arch);
      }
      return A;
   }
   
   bool operator <(const PkgName &x) const {return Compare3(x) < 0;};
   bool operator >(const PkgName &x) const {return Compare3(x) > 0;};
   bool operator ==(const PkgName &x) const {return Compare3(x) == 0;};
};
									/*}}}*/
// DoIt - Sort a single file						/*{{{*/
// ---------------------------------------------------------------------
/* */
static bool DoIt(string InFile)
{
   FileFd Fd(InFile,FileFd::ReadOnly);
   pkgTagFile Tags(&Fd);
   if (_error->PendingError() == true)
      return false;
   
   // Parse.
   vector<PkgName> List;
   pkgTagSection Section;
   unsigned long Largest = 0;
   unsigned long Offset = Tags.Offset();
   bool Source = _config->FindB("APT::SortPkgs::Source",false);
   while (Tags.Step(Section) == true)
   {
      PkgName Tmp;
      
      /* Fetch the name, auto-detecting if this is a source file or a 
         package file */
      Tmp.Name = Section.FindS("Package");
      Tmp.Ver = Section.FindS("Version");
      Tmp.Arch = Section.FindS("Architecture");
      
      if (Tmp.Name.empty() == true)
	 return _error->Error(_("Unknown package record!"));
      
      Tmp.Offset = Offset;
      Tmp.Length = Section.size();
      if (Largest < Tmp.Length)
	 Largest = Tmp.Length;
      
      List.push_back(Tmp);
      
      Offset = Tags.Offset();
   }
   if (_error->PendingError() == true)
      return false;
   
   // Sort it
   sort(List.begin(),List.end());

   const char **Order = TFRewritePackageOrder;
   if (Source == true)
      Order = TFRewriteSourceOrder;

   // Emit
   FileFd stdoutfd;
   stdoutfd.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, false);
   auto const Buffer = std::unique_ptr<unsigned char[]>(new unsigned char[Largest+1]);
   for (vector<PkgName>::iterator I = List.begin(); I != List.end(); ++I)
   {
      // Read in the Record.
      if (Fd.Seek(I->Offset) == false || Fd.Read(Buffer.get(),I->Length) == false)
	 return false;

      Buffer[I->Length] = '\n';
      if (Section.Scan((char *)Buffer.get(),I->Length+1) == false)
	 return _error->Error("Internal error, failed to scan buffer");

      // Sort the section
      if (Section.Write(stdoutfd, Order) == false || stdoutfd.Write("\n", 1) == false)
	 return _error->Error("Internal error, failed to sort fields");
   }
   return true;
}
									/*}}}*/
bool ShowHelp(CommandLine &, aptDispatchWithHelp const *)		/*{{{*/
{
   std::cout <<
    _("Usage: apt-sortpkgs [options] file1 [file2 ...]\n"
      "\n"
      "apt-sortpkgs is a simple tool to sort package files. The -s option is used\n"
      "to indicate what kind of file it is.\n"
      "\n"
      "Options:\n"
      "  -h   This help text\n"
      "  -s   Use source file sorting\n"
      "  -c=? Read this configuration file\n"
      "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
   return true;
}
									/*}}}*/
std::vector<aptDispatchWithHelp> GetCommands()				/*{{{*/
{
   return {
      {nullptr, nullptr, nullptr}
   };
}
									/*}}}*/
int main(int argc,const char *argv[])					/*{{{*/
{
   InitLocale();

   CommandLine CmdL;
   ParseCommandLine(CmdL, APT_CMD::APT_SORTPKG, &_config, &_system, argc, argv);

   // Match the operation
   for (unsigned int I = 0; I != CmdL.FileSize(); I++)
      if (DoIt(CmdL.FileList[I]) == false)
	 break;

   return DispatchCommandLine(CmdL, {});
}
									/*}}}*/