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
  72                 override protected void PullPackageProperties ()
  73                 {
  74                         string str = null;
  75                         while ((str = TextReader.ReadLine ()) != null) {
  76                                 // Skip comments
  77                                 if (str.StartsWith ("#"))
  78                                         continue;
  79
  80                                 // Handle line continuation
  81                                 string str2 = null;
  82                                 while (str.Trim ().EndsWith ("\\") && ((str2 = TextReader.ReadLine ()) != null) ) {
  83                                         str = str.Trim ();
  84                                         if (str.Length == 1)
  85                                                 str = str2;
  86                                         else
  87                                                 str = str.Substring (0, str.Length - 1) + " " + str2.Trim ();
  88                                 }
  89
  90                                 if (str.Length == 0)
  91                                         continue;
  92
  93                                 // check for meta data
  94                                 MatchCollection matches;
  95                                 matches = metadata_pattern.Matches (str);
  96
  97                                 if (matches.Count > 0) {
  98                                         foreach (Match the_match in matches) {
  99                                                 String key = the_match.Groups ["key"].ToString ();
 100                                                 String val = the_match.Groups ["value"].ToString ();
 101                                                 if (key.Equals ("DESCRIPTION"))
 102                                                         Summary = val; // Ebuild descriptions are short - use them as summary.
 103                                                 else if (key.Equals ("LICENSE"))
 104                                                         AddProperty (Beagle.Property.NewUnsearched ("dc:rights", val));
 105                                                 else if (key.Equals ("HOMEPAGE"))
 106                                                         Homepage = val;
 107                                         }
 108                                 } else {
 109                                         // check for einfo/ewarn
 110                                         matches = einfo_pattern.Matches (str);
 111                                         if (matches.Count > 0) {
 112                                                 foreach (Match the_match in matches)
 113                                                         AppendText (the_match.Groups ["message"].ToString ());
 114                                         }
 115                                 }
 116                         }
 117                 }
 118         }
 119 }