mcs/tools/cil-strip/Mono.Cecil/BaseAssemblyResolver.cs

   1 //
   2 // BaseAssemblyResolver.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@gmail.com)
   6 //
   7 // (C) 2005 Jb Evain
   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 namespace Mono.Cecil {
  30
  31         using System;
  32         using System.Collections;
  33         using System.IO;
  34         using SR = System.Reflection;
  35         using System.Text;
  36
  37         internal abstract class BaseAssemblyResolver : IAssemblyResolver {
  38
  39                 ArrayList m_directories;
  40                 string[] m_monoGacPaths;
  41
  42                 public void AddSearchDirectory (string directory)
  43                 {
  44                         m_directories.Add (directory);
  45                 }
  46
  47                 public void RemoveSearchDirectory (string directory)
  48                 {
  49                         m_directories.Remove (directory);
  50                 }
  51
  52                 public string [] GetSearchDirectories ()
  53                 {
  54                         return (string []) m_directories.ToArray (typeof (string));
  55                 }
  56
  57                 public virtual AssemblyDefinition Resolve (string fullName)
  58                 {
  59                         return Resolve (AssemblyNameReference.Parse (fullName));
  60                 }
  61
  62                 public BaseAssemblyResolver ()
  63                 {
  64                         m_directories = new ArrayList ();
  65                         m_directories.Add (".");
  66                         m_directories.Add ("bin");
  67                 }
  68
  69                 public virtual AssemblyDefinition Resolve (AssemblyNameReference name)
  70                 {
  71                         AssemblyDefinition assembly;
  72                         string frameworkdir = Path.GetDirectoryName (typeof (object).Module.FullyQualifiedName);
  73
  74                         assembly = SearchDirectory (name, m_directories);
  75                         if (assembly != null)
  76                                 return assembly;
  77
  78                         if (IsZero (name.Version)) {
  79                                 assembly = SearchDirectory (name, new string [] {frameworkdir});
  80                                 if (assembly != null)
  81                                         return assembly;
  82                         }
  83
  84 #if !CF_1_0 && !CF_2_0 && !NO_SYSTEM_DLL
  85                         if (name.Name == "mscorlib") {
  86                                 assembly = GetCorlib (name);
  87                                 if (assembly != null)
  88                                         return assembly;
  89                         }
  90
  91                         assembly = GetAssemblyInGac (name);
  92                         if (assembly != null)
  93                                 return assembly;
  94 #endif
  95
  96                         assembly = SearchDirectory (name, new string [] {frameworkdir});
  97                         if (assembly != null)
  98                                 return assembly;
  99
 100                         throw new FileNotFoundException ("Could not resolve: " + name);
 101                 }
 102
 103                 static readonly string [] _extentions = new string [] { ".dll", ".exe" };
 104
 105                 static AssemblyDefinition SearchDirectory (AssemblyNameReference name, IEnumerable directories)
 106                 {
 107                         foreach (string dir in directories) {
 108                                 foreach (string ext in _extentions) {
 109                                         string file = Path.Combine (dir, name.Name + ext);
 110                                         if (File.Exists (file))
 111                                                 return AssemblyFactory.GetAssembly (file);
 112                                 }
 113                         }
 114
 115                         return null;
 116                 }
 117
 118                 static bool IsZero (Version version)
 119                 {
 120                         return version.Major == 0 && version.Minor == 0 && version.Build == 0 && version.Revision == 0;
 121                 }
 122
 123 #if !CF_1_0 && !CF_2_0 && !NO_SYSTEM_DLL
 124                 static AssemblyDefinition GetCorlib (AssemblyNameReference reference)
 125                 {
 126                         SR.AssemblyName corlib = typeof (object).Assembly.GetName ();
 127                         if (corlib.Version == reference.Version || IsZero (reference.Version))
 128                                 return AssemblyFactory.GetAssembly (typeof (object).Module.FullyQualifiedName);
 129
 130                         string path = Directory.GetParent (
 131                                 Directory.GetParent (
 132                                         typeof (object).Module.FullyQualifiedName).FullName
 133                                 ).FullName;
 134
 135                         string runtime_path = null;
 136                         if (OnMono ()) {
 137                                 if (reference.Version.Major == 1)
 138                                         runtime_path = "1.0";
 139                                 else if (reference.Version.Major == 2) {
 140                                         if (reference.Version.Minor == 1)
 141                                                 runtime_path = "2.1";
 142                                         else
 143                                                 runtime_path = "2.0";
 144                                 } else if (reference.Version.Major == 4)
 145                                         runtime_path = "4.0";
 146                         } else {
 147                                 switch (reference.Version.ToString ()) {
 148                                 case "1.0.3300.0":
 149                                         runtime_path = "v1.0.3705";
 150                                         break;
 151                                 case "1.0.5000.0":
 152                                         runtime_path = "v1.1.4322";
 153                                         break;
 154                                 case "2.0.0.0":
 155                                         runtime_path = "v2.0.50727";
 156                                         break;
 157                                 case "4.0.0.0":
 158                                         runtime_path = "v4.0.30319";
 159                                         break;
 160                                 }
 161                         }
 162
 163                         if (runtime_path == null)
 164                                 throw new NotSupportedException ("Version not supported: " + reference.Version);
 165
 166                         path = Path.Combine (path, runtime_path);
 167
 168                         if (File.Exists (Path.Combine (path, "mscorlib.dll")))
 169                                 return AssemblyFactory.GetAssembly (Path.Combine (path, "mscorlib.dll"));
 170
 171                         return null;
 172                 }
 173
 174                 public static bool OnMono ()
 175                 {
 176                         return typeof (object).Assembly.GetType ("System.MonoType", false) != null;
 177                 }
 178
 179                 string[] MonoGacPaths {
 180                         get {
 181                                 if (m_monoGacPaths == null)
 182                                         m_monoGacPaths = GetDefaultMonoGacPaths ();
 183                                 return m_monoGacPaths;
 184                         }
 185                 }
 186
 187                 static string[] GetDefaultMonoGacPaths ()
 188                 {
 189                         ArrayList paths = new ArrayList ();
 190                         string s = GetCurrentGacPath ();
 191                         if (s != null)
 192                                 paths.Add (s);
 193                         string gacPathsEnv = Environment.GetEnvironmentVariable ("MONO_GAC_PREFIX");
 194                         if (gacPathsEnv != null && gacPathsEnv.Length > 0) {
 195                                 string[] gacPrefixes = gacPathsEnv.Split (Path.PathSeparator);
 196                                 foreach (string gacPrefix in gacPrefixes) {
 197                                         if (gacPrefix != null && gacPrefix.Length > 0) {
 198                                                 string gac = Path.Combine (Path.Combine (Path.Combine (gacPrefix, "lib"), "mono"), "gac");
 199                                                 if (Directory.Exists (gac) && !paths.Contains (gac))
 200                                                         paths.Add (gac);
 201                                         }
 202                                 }
 203                         }
 204                         return (string[]) paths.ToArray (typeof (String));
 205                 }
 206
 207                 AssemblyDefinition GetAssemblyInGac (AssemblyNameReference reference)
 208                 {
 209                         if (reference.PublicKeyToken == null || reference.PublicKeyToken.Length == 0)
 210                                 return null;
 211
 212                         if (OnMono ()) {
 213                                 foreach (string gacpath in MonoGacPaths) {
 214                                         string s = GetAssemblyFile (reference, gacpath);
 215                                         if (File.Exists (s))
 216                                                 return AssemblyFactory.GetAssembly (s);
 217                                 }
 218                         } else {
 219                                 string currentGac = GetCurrentGacPath ();
 220                                 if (currentGac == null)
 221                                         return null;
 222
 223                                 string [] gacs = new string [] {"GAC_MSIL", "GAC_32", "GAC"};
 224                                 for (int i = 0; i < gacs.Length; i++) {
 225                                         string gac = Path.Combine (Directory.GetParent (currentGac).FullName, gacs [i]);
 226                                         string asm = GetAssemblyFile (reference, gac);
 227                                         if (Directory.Exists (gac) && File.Exists (asm))
 228                                                 return AssemblyFactory.GetAssembly (asm);
 229                                 }
 230                         }
 231
 232                         return null;
 233                 }
 234
 235                 static string GetAssemblyFile (AssemblyNameReference reference, string gac)
 236                 {
 237                         StringBuilder sb = new StringBuilder ();
 238                         sb.Append (reference.Version);
 239                         sb.Append ("__");
 240                         for (int i = 0; i < reference.PublicKeyToken.Length; i++)
 241                                 sb.Append (reference.PublicKeyToken [i].ToString ("x2"));
 242
 243                         return Path.Combine (
 244                                 Path.Combine (
 245                                         Path.Combine (gac, reference.Name), sb.ToString ()),
 246                                         string.Concat (reference.Name, ".dll"));
 247                 }
 248
 249                 static string GetCurrentGacPath ()
 250                 {
 251                         string file = typeof (Uri).Module.FullyQualifiedName;
 252                         if (!File.Exists (file))
 253                                 return null;
 254
 255                         return Directory.GetParent (
 256                                 Directory.GetParent (
 257                                         Path.GetDirectoryName (
 258                                                 file)
 259                                         ).FullName
 260                                 ).FullName;
 261                 }
 262 #endif
 263         }
 264 }