mcs/class/Mono.CodeContracts/Mono.CodeContracts.Rewrite/Rewriter.cs

   1 //\r
   2 // Rewriter.cs\r
   3 //\r
   4 // Authors:\r
   5 //      Chris Bacon (chrisbacon76@gmail.com)\r
   6 //\r
   7 // Copyright (C) 2010 Novell, Inc (http://www.novell.com)\r
   8 //\r
   9 // Permission is hereby granted, free of charge, to any person obtaining\r
  10 // a copy of this software and associated documentation files (the\r
  11 // "Software"), to deal in the Software without restriction, including\r
  12 // without limitation the rights to use, copy, modify, merge, publish,\r
  13 // distribute, sublicense, and/or sell copies of the Software, and to\r
  14 // permit persons to whom the Software is furnished to do so, subject to\r
  15 // the following conditions:\r
  16 // \r
  17 // The above copyright notice and this permission notice shall be\r
  18 // included in all copies or substantial portions of the Software.\r
  19 // \r
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  27 //\r
  28 \r
  29 using System;\r
  30 using System.Collections.Generic;\r
  31 using System.Linq;\r
  32 using System.Text;\r
  33 using Mono.Cecil.Cil;\r
  34 using Mono.Cecil;\r
  35 using System.IO;\r
  36 using Mono.CompilerServices.SymbolWriter;\r
  37 \r
  38 namespace Mono.CodeContracts.Rewrite {\r
  39         public class Rewriter {\r
  40 \r
  41                 public static RewriterResults Rewrite (RewriterOptions options)\r
  42                 {\r
  43                         Rewriter rewriter = new Rewriter(options);\r
  44                         return rewriter.RewriteImpl();\r
  45                 }\r
  46                 \r
  47                 private Rewriter(RewriterOptions options)\r
  48                 {\r
  49                         this.options = options;\r
  50                 }\r
  51                 \r
  52                 private RewriterOptions options;\r
  53                 private List<string> warnings = new List<string> ();\r
  54                 private List<string> errors = new List<string> ();\r
  55                 private bool usingMdb = false;\r
  56                 private bool usingPdb = false;\r
  57                 \r
  58                 private void LoadSymbolReader (AssemblyDefinition assembly) {\r
  59                         if (this.options.Assembly.IsStream && this.options.Assembly.Streams.Symbols == null) {\r
  60                                 this.warnings.Add ("-debug specified, but no symbol stream provided.");\r
  61                         } else {\r
  62                                 try {\r
  63                                         foreach (ModuleDefinition module in assembly.Modules) {\r
  64                                                 module.LoadSymbols ();\r
  65                                         }\r
  66                                         this.usingMdb = true;\r
  67                                 } catch {\r
  68                                 }\r
  69                                 if (!this.usingMdb && !this.usingPdb) {\r
  70                                         this.warnings.Add ("-debug specified, but no MDB or PDB symbol file found.");\r
  71                                 }\r
  72                         }\r
  73                 }\r
  74                 \r
  75                 private ISymbolWriter LoadSymbolWriter(AssemblyDefinition assembly, AssemblyRef output)\r
  76                 {\r
  77                         // TODO: Get symbol writing to work.\r
  78 //                      ISymbolWriterProvider symProv = null;\r
  79 //                      if (this.usingMdb) {\r
  80 //                              symProv = new Mono.Cecil.Mdb.MdbWriterProvider ();\r
  81 //                      } else if (this.usingPdb) {\r
  82 //                              symProv = new Mono.Cecil.Pdb.PdbWriterProvider ();\r
  83 //                      } else {\r
  84 //                              this.warnings.Add ("-writePDBFile specified, but no symbol file found, cannot write symbols.");\r
  85 //                      }\r
  86 //                      if (symProv != null) {\r
  87 //                              return output.IsFilename ?\r
  88 //                                      symProv.GetSymbolWriter (assembly.MainModule, output.Filename) :\r
  89 //                                      symProv.GetSymbolWriter (assembly.MainModule, output.Streams.Symbols);\r
  90 //                      }\r
  91                         return null;\r
  92                 }\r
  93 \r
  94 \r
  95                 private RewriterResults RewriteImpl ()\r
  96                 {\r
  97                         if (!this.options.Rewrite) {\r
  98                                 return RewriterResults.Warning ("Not asked to rewrite");\r
  99                         }\r
 100 \r
 101                         if (!this.options.Assembly.IsSet) {\r
 102                                 return RewriterResults.Error ("No assembly given to rewrite");\r
 103                         }\r
 104                         AssemblyDefinition assembly = this.options.Assembly.IsFilename ?\r
 105                                 AssemblyFactory.GetAssembly (this.options.Assembly.Filename) :\r
 106                                 AssemblyFactory.GetAssembly (this.options.Assembly.Streams.Assembly);\r
 107                         \r
 108                         if (this.options.ForceAssemblyRename != null) {\r
 109                                 assembly.Name.Name = this.options.ForceAssemblyRename;\r
 110                         } else if (this.options.OutputFile.IsSet && this.options.OutputFile.IsFilename) {\r
 111                                 assembly.Name.Name = Path.GetFileNameWithoutExtension(this.options.OutputFile.Filename);\r
 112                         }\r
 113 \r
 114                         if (options.Debug) {\r
 115                                 this.LoadSymbolReader (assembly);\r
 116                         }\r
 117 \r
 118                         var output = this.options.OutputFile.IsSet ? this.options.OutputFile : this.options.Assembly;\r
 119                         ISymbolWriter symWriter = null;\r
 120                         if (options.WritePdbFile) {\r
 121                                 if (!options.Debug) {\r
 122                                         return RewriterResults.Error ("Must specify -debug if using -writePDBFile.");\r
 123                                 }\r
 124                                 if (output.IsStream && output.Streams.Symbols==null){\r
 125                                         return RewriterResults.Error ("-writePDFFile specified, but no output symbol stream provided.");\r
 126                                 }\r
 127                                 symWriter = this.LoadSymbolWriter (assembly, output);\r
 128                         }\r
 129                         \r
 130                         try {\r
 131                                 PerformRewrite rewriter = new PerformRewrite (symWriter, this.options);\r
 132                                 rewriter.Rewrite (assembly);\r
 133 \r
 134                                 if (output.IsFilename) {\r
 135                                         AssemblyFactory.SaveAssembly(assembly, output.Filename);\r
 136                                 } else {\r
 137                                         AssemblyFactory.SaveAssembly(assembly, output.Streams.Assembly);\r
 138                                 }\r
 139                         } finally {\r
 140                                 if (symWriter != null) {\r
 141                                         symWriter.Dispose ();\r
 142                                 }\r
 143                         }\r
 144 \r
 145                         return new RewriterResults (warnings, errors);\r
 146                 }\r
 147                 \r
 148         }\r
 149 }\r