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

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