Filters/FilterRPM.cs

   1 //
   2 // FilterRPM.cs
   3 //
   4 // Copyright (C) 2006 Debajyoti Bera <dbera.web@gmail.com>
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.IO;
  29 using System.Text;
  30 using System.Collections;
  31 using System.Diagnostics;
  32 using System.Xml;
  33
  34 using Beagle.Daemon;
  35 using Beagle.Util;
  36
  37 namespace Beagle.Filters {
  38         public class FilterRPM : FilterPackage {
  39
  40                 private class RpmPropertyInfo {
  41                         public string property_name;
  42                         public bool is_keyword;
  43
  44                         public RpmPropertyInfo (string property_name, bool is_keyword)
  45                         {
  46                                 this.property_name = property_name;
  47                                 this.is_keyword = is_keyword;
  48                         }
  49                 }
  50
  51                 private static Hashtable hash_property_list;
  52                 static FilterRPM ()
  53                 {
  54                     hash_property_list = new Hashtable ();
  55
  56                     // mapping between rpm tagname and beagle property name
  57                     hash_property_list ["Release"]       = new RpmPropertyInfo ("fixme:release", true);
  58                     hash_property_list ["License"]       = new RpmPropertyInfo ("dc:rights", true);
  59                     hash_property_list ["Os"]            = new RpmPropertyInfo ("fixme:os", true);
  60                     hash_property_list ["Arch"]          = new RpmPropertyInfo ("fixme:arch", true);
  61                     hash_property_list ["Changelogtext"] = new RpmPropertyInfo ("fixme:changelog", false);
  62                 }
  63
  64                 public FilterRPM ()
  65                 {
  66                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-rpm"));
  67                 }
  68
  69                 protected override void PullPackageProperties ()
  70                 {
  71                         SafeProcess pc = new SafeProcess ();
  72                         pc.Arguments = new string [] { "rpm", "-qp", "--queryformat", "[%{*:xml}\n]", FileInfo.FullName };
  73                         pc.RedirectStandardOutput = true;
  74                         pc.RedirectStandardError = true;
  75
  76                         try {
  77                                 pc.Start ();
  78                         } catch (SafeProcessException e) {
  79                                 Log.Warn (e.Message);
  80                                 Error ();
  81                                 return;
  82                         }
  83
  84                         XmlTextReader reader = new XmlTextReader (new StreamReader (pc.StandardOutput));
  85                         reader.WhitespaceHandling = WhitespaceHandling.None;
  86
  87                         try {
  88                                 ParseRpmTags (reader);
  89                         } catch (XmlException e) {
  90                                 Logger.Log.Warn (e, "FilterRPM: Error parsing output of rpmquery");
  91                                 Error ();
  92                         } finally {
  93                                 reader.Close ();
  94                                 pc.Close ();
  95                         }
  96                 }
  97
  98                 private void ParseRpmTags (XmlTextReader reader)
  99                 {
 100                         reader.Read ();
 101                         while (reader.Read ()) {
 102                                 if (reader.IsEmptyElement || ! reader.IsStartElement ())
 103                                         continue;
 104                                 else if (reader.Name != "rpmTag") {
 105                                         reader.Skip ();
 106                                         continue;
 107                                 }
 108                                 string attr_name = reader ["name"];
 109                                 //Logger.Log.Debug ("Read element:" + reader.Name + " - " + attr_name);
 110
 111                                 ReadStringValues (reader, attr_name);
 112                         }
 113                 }
 114
 115                 private void ReadStringValues (XmlTextReader reader, string attr_name)
 116                 {
 117                         RpmPropertyInfo prop_info = (RpmPropertyInfo) hash_property_list [attr_name];
 118                         if (attr_name != "Basenames" &&
 119                             attr_name != "Name" &&
 120                             attr_name != "Version" &&
 121                             attr_name != "Summary" &&
 122                             attr_name != "Description" &&
 123                             attr_name != "Size" &&
 124                             attr_name != "Packager" &&
 125                             attr_name != "Group" &&
 126                             attr_name != "Url" &&
 127                             prop_info == null)
 128                                 return;
 129
 130                         reader.ReadStartElement ();
 131
 132                         while (reader.IsStartElement ()) {
 133                                 //Logger.Log.Debug ("        Reading value for:" + reader.Name);
 134                                 if (reader.IsEmptyElement)
 135                                         reader.Skip ();
 136
 137                                 string content = HtmlAgilityPack.HtmlEntity.DeEntitize (reader.ReadInnerXml ());
 138
 139                                 switch (attr_name) {
 140                                         case "Name":
 141                                                 PackageName = content;
 142                                                 break;
 143
 144                                         case "Version":
 145                                                 PackageVersion = content;
 146                                                 break;
 147
 148                                         case "Summary":
 149                                                 Summary = content;
 150                                                 break;
 151
 152                                         case "Description":
 153                                                 AppendText (content);
 154                                                 AppendWhiteSpace ();
 155                                                 break;
 156
 157                                         case "Basenames":
 158                                                 AddProperty (Beagle.Property.NewUnstored ("fixme:files", content));
 159                                                 break;
 160
 161                                         case "Size":
 162                                                 Size = content;
 163                                                 break;
 164
 165                                         case "Group":
 166                                                 Category = content.Replace ('/', ' ');
 167                                                 break;
 168
 169                                         case "Url":
 170                                                 Homepage = content;
 171                                                 break;
 172
 173                                         case "Packager":
 174                                                 // FIXME: Not a correct way to extract name-email info.
 175                                                 string[] name_email = content.Split ('<');
 176                                                 PackagerName = name_email [0];
 177                                                 if (name_email.Length > 1)
 178                                                         PackagerEmail = name_email [1].Replace ('>', ' ');
 179                                                 break;
 180
 181                                         default:
 182                                                 if (prop_info == null)
 183                                                         break;
 184                                                 if (prop_info.is_keyword)
 185                                                         AddProperty (Beagle.Property.NewUnsearched (prop_info.property_name, content));
 186                                                 else
 187                                                         AddProperty (Beagle.Property.New (prop_info.property_name, content));
 188                                                 break;
 189                                 }
 190                         }
 191
 192                         //Logger.Log.Debug ("    Done reading values. Now at " +
 193                         //      (reader.IsStartElement () ? "" : "/") + reader.Name);
 194                 }
 195         }
 196 }