Filters/FilterEbuild.cs

   1 //
   2 // FilterEbuild.cs
   3 //
   4 // Copyright (C) 2006 Pat Double <pat@patdouble.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.RegularExpressions;
  30 using Beagle.Daemon;
  31
  32 namespace Beagle.Filters {
  33
  34         public class FilterEbuild : FilterPackage {
  35                 static Regex metadata_pattern = new Regex ("\\s*(?<key>([A-Z_]+))\\s*=\\s*\"(?<value>(.*))\"\\s*");
  36                 static Regex einfo_pattern = new Regex ("\\s*(einfo|ewarn)\\s+\"(?<message>(.*))\"\\s*");
  37                 static Regex package_pattern = new Regex ("(?<name>([^0-9]+))-(?<version>(.+)).ebuild");
  38
  39                 public FilterEbuild ()
  40                 {
  41                         AddSupportedFlavor (FilterFlavor.NewFromExtension (".ebuild"));
  42                 }
  43
  44                 override protected void DoOpen (FileInfo file)
  45                 {
  46                         Match match = package_pattern.Match (file.Name);
  47
  48                         PackageName = match.Groups ["name"].ToString();
  49                         PackageVersion = match.Groups ["version"].ToString();
  50
  51                         if (PackageName.Length == 0 && PackageVersion.Length == 0)
  52                                 return;
  53
  54                         // get download file size
  55                         FileInfo digest = new FileInfo (file.Directory.FullName + "/files/digest-" + PackageName + "-" + PackageVersion);
  56                         if (digest.Exists) {
  57                                 long download_size = 0;
  58                                 StreamReader digest_reader = new StreamReader (new FileStream (digest.FullName, FileMode.Open, FileAccess.Read, FileShare.Read));
  59                                 string digest_line = null;
  60                                 while ((digest_line = digest_reader.ReadLine ()) != null) {
  61                                         string[] digest_parts = digest_line.Split (' ');
  62                                         if (digest_parts.Length < 4)
  63                                                 continue;
  64                                         if (digest_parts[0].Equals ("MD5"))
  65                                                 download_size += Int64.Parse (digest_parts[3]);
  66                                 }
  67                                 Size = download_size.ToString ();
  68                                 digest_reader.Close ();
  69                         }
  70
  71                         // get installation information
  72                         if (! file.FullName.StartsWith ("/var/db/pkg/"))
  73                                 return;
  74                         FileInfo contents = new FileInfo (Path.Combine (file.Directory.FullName, "CONTENTS"));
  75                         if (!contents.Exists)
  76                                 return;
  77                         AddProperty (Beagle.Property.NewDate ("fixme:install_time", contents.LastWriteTime));
  78
  79                         // find installed objects
  80                         long file_count = 0;
  81                         long dir_count = 0;
  82                         long byte_count = 0;
  83                         StreamReader contents_reader = new StreamReader (new FileStream (contents.FullName, FileMode.Open, FileAccess.Read, FileShare.Read));
  84                         string contents_line = null;
  85                         while ((contents_line = contents_reader.ReadLine ()) != null) {
  86                                 if (contents_line.StartsWith ("dir"))
  87                                         dir_count ++;
  88                                 else if (!contents_line.StartsWith ("obj"))
  89                                         continue;
  90
  91                                 file_count ++;
  92                                 string[] contents_parts = contents_line.Split (' ');
  93                                 if (contents_parts.Length < 2)
  94                                         continue;
  95                                 FileInfo desktop_file = null;
  96                                 try {
  97                                         FileInfo installed = new FileInfo (contents_parts[1]);
  98                                         if (installed.Exists)
  99                                         {
 100                                                 byte_count += installed.Length;
 101                                                 if (contents_parts[1].EndsWith (".desktop"))
 102                                                         desktop_file = installed;
 103                                         }
 104                                 }
 105                                 catch (IOException e) {
 106                                         // Mostly likely caused by permission error
 107                                 }
 108
 109                                 if (desktop_file == null)
 110                                         continue;
 111                                 // verify this is a desktop file
 112                                 StreamReader desktop_reader = new StreamReader (new FileStream (desktop_file.FullName, FileMode.Open, FileAccess.Read, FileShare.Read));
 113                                 string desktop_line = null;
 114                                 bool desktop_valid = false;
 115                                 while ((desktop_line = desktop_reader.ReadLine ()) != null) {
 116                                         if (desktop_line.Trim ().Length > 0) {
 117                                                 desktop_valid = desktop_line.Equals ("[Desktop Entry]");
 118                                                 break;
 119                                         }
 120                                 }
 121
 122                                 // add property
 123                                 if (desktop_valid)
 124                                         AddProperty (Beagle.Property.NewUnsearched ("fixme:desktop_file", desktop_file.FullName));
 125                         }
 126
 127                         AddProperty (Beagle.Property.NewUnsearched ("fixme:contents_byte_count", byte_count));
 128                         AddProperty (Beagle.Property.NewUnsearched ("fixme:contents_file_count", file_count));
 129                         AddProperty (Beagle.Property.NewUnsearched ("fixme:contents_dir_count", dir_count));
 130                 }
 131
 132                 override protected void PullPackageProperties ()
 133                 {
 134                         string str = null;
 135                         while ((str = TextReader.ReadLine ()) != null) {
 136                                 // Skip comments
 137                                 if (str.StartsWith ("#"))
 138                                         continue;
 139
 140                                 // Handle line continuation
 141                                 string str2 = null;
 142                                 while (str.Trim ().EndsWith ("\\") && ((str2 = TextReader.ReadLine ()) != null) ) {
 143                                         str = str.Trim ();
 144                                         if (str.Length == 1)
 145                                                 str = str2;
 146                                         else
 147                                                 str = str.Substring (0, str.Length - 1) + " " + str2.Trim ();
 148                                 }
 149
 150                                 if (str.Length == 0)
 151                                         continue;
 152
 153                                 // check for meta data
 154                                 MatchCollection matches;
 155                                 matches = metadata_pattern.Matches (str);
 156
 157                                 if (matches.Count > 0) {
 158                                         foreach (Match the_match in matches) {
 159                                                 String key = the_match.Groups ["key"].ToString ();
 160                                                 String val = the_match.Groups ["value"].ToString ();
 161                                                 if (key.Equals ("DESCRIPTION"))
 162                                                         Summary = val; // Ebuild descriptions are short - use them as summary.
 163                                                 else if (key.Equals ("LICENSE"))
 164                                                         AddProperty (Beagle.Property.NewUnsearched ("dc:rights", val));
 165                                                 else if (key.Equals ("HOMEPAGE"))
 166                                                         Homepage = val;
 167                                         }
 168                                 } else {
 169                                         // check for einfo/ewarn
 170                                         matches = einfo_pattern.Matches (str);
 171                                         if (matches.Count > 0) {
 172                                                 foreach (Match the_match in matches)
 173                                                         AppendText (the_match.Groups ["message"].ToString ());
 174                                         }
 175                                 }
 176                         }
 177                 }
 178         }
 179 }