mcs/class/Microsoft.Build.Tasks/Microsoft.Build.Tasks/AssemblyResolver.cs

   1 //
   2 // AssemblyResolver.cs
   3 //
   4 // Author:
   5 //   Marek Sieradzki (marek.sieradzki@gmail.com)
   6 //   Ankit Jain (jankit@novell.com)
   7 //
   8 // (C) 2006 Marek Sieradzki
   9 // Copyright 2009 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29
  30 #if NET_2_0
  31
  32 using System;
  33 using System.Collections.Generic;
  34 using System.IO;
  35 using System.Linq;
  36 using System.Reflection;
  37 using System.Security;
  38 using Microsoft.Build.Framework;
  39 using Microsoft.Build.Utilities;
  40 using Mono.PkgConfig;
  41
  42 namespace Microsoft.Build.Tasks {
  43         internal class AssemblyResolver {
  44
  45                 // name -> (version -> assemblypath)
  46                 Dictionary<string, TargetFrameworkAssemblies> target_framework_cache;
  47                 Dictionary<string, Dictionary<Version, string>> gac;
  48                 TaskLoggingHelper log;
  49                 StringWriter sw;
  50                 List<string> search_log;
  51
  52                 static LibraryPcFileCache cache;
  53
  54                 public AssemblyResolver ()
  55                 {
  56                         gac = new Dictionary<string, Dictionary<Version, string>> ();
  57                         target_framework_cache = new Dictionary <string, TargetFrameworkAssemblies> ();
  58
  59                         GatherGacAssemblies ();
  60                 }
  61
  62                 public void ResetSearchLogger ()
  63                 {
  64                         if (search_log == null)
  65                                 search_log = new List<string> ();
  66                         else
  67                                 search_log.Clear ();
  68                 }
  69
  70                 string GetGacPath ()
  71                 {
  72                         // NOTE: code from mcs/tools/gacutil/driver.cs
  73                         PropertyInfo gac = typeof (System.Environment).GetProperty ("GacPath", BindingFlags.Static | BindingFlags.NonPublic);
  74
  75                         if (gac == null)
  76                                 return null;
  77
  78                         MethodInfo get_gac = gac.GetGetMethod (true);
  79                         return (string) get_gac.Invoke (null, null);
  80                 }
  81
  82                 void GatherGacAssemblies ()
  83                 {
  84                         string gac_path = GetGacPath ();
  85                         if (gac_path == null)
  86                                 throw new InvalidOperationException ("XBuild must be run on Mono runtime");
  87                         if (!Directory.Exists (gac_path))
  88                                 return; // in case mono isn't "installed".
  89
  90                         Version version;
  91                         DirectoryInfo version_info, assembly_info;
  92
  93                         foreach (string assembly_name in Directory.GetDirectories (gac_path)) {
  94                                 assembly_info = new DirectoryInfo (assembly_name);
  95                                 foreach (string version_token in Directory.GetDirectories (assembly_name)) {
  96                                         foreach (string file in Directory.GetFiles (version_token, "*.dll")) {
  97                                                 version_info = new DirectoryInfo (version_token);
  98                                                 version = new Version (version_info.Name.Split (
  99                                                         new char [] {'_'}, StringSplitOptions.RemoveEmptyEntries) [0]);
 100
 101                                                 Dictionary<Version, string> assembliesByVersion = new Dictionary <Version, string> ();
 102                                                 if (!gac.TryGetValue (assembly_info.Name, out assembliesByVersion)) {
 103                                                         assembliesByVersion = new Dictionary <Version, string> ();
 104                                                         gac.Add (assembly_info.Name, assembliesByVersion);
 105                                                 }
 106
 107                                                 string found_file;
 108                                                 if (assembliesByVersion.TryGetValue (version, out found_file) &&
 109                                                         File.GetLastWriteTime (file) <= File.GetLastWriteTime (found_file))
 110                                                                 // Duplicate found, take the newer file
 111                                                                 continue;
 112
 113                                                 assembliesByVersion [version] = file;
 114                                         }
 115                                 }
 116                         }
 117                 }
 118
 119                 public ResolvedReference FindInTargetFramework (ITaskItem reference, string framework_dir, bool specific_version)
 120                 {
 121                         if (!Directory.Exists (framework_dir))
 122                                 return null;
 123
 124                         AssemblyName key_aname;
 125                         if (!TryGetAssemblyNameFromFullName (reference.ItemSpec, out key_aname))
 126                                 return null;
 127
 128                         TargetFrameworkAssemblies gac_asm;
 129                         if (!target_framework_cache.TryGetValue (framework_dir, out gac_asm)) {
 130                                 // fill gac_asm
 131                                 gac_asm = target_framework_cache [framework_dir] = PopulateTargetFrameworkAssemblies (framework_dir);
 132                         }
 133
 134                         KeyValuePair<AssemblyName, string> pair;
 135                         if (gac_asm.NameToAssemblyNameCache.TryGetValue (key_aname.Name, out pair)) {
 136                                 if (AssemblyNamesCompatible (key_aname, pair.Key, specific_version)) {
 137                                         // gac and tgt frmwk refs are not copied private
 138                                         return GetResolvedReference (reference, pair.Value, pair.Key, false,
 139                                                         SearchPath.TargetFrameworkDirectory);
 140                                 }
 141
 142                                 LogSearchMessage ("Considered target framework dir {0}, assembly name '{1}' did not " +
 143                                                 "match the expected '{2}' (SpecificVersion={3})",
 144                                                 framework_dir, pair.Key, key_aname, specific_version);
 145                         } else {
 146                                 LogSearchMessage ("Considered target framework dir {0}, assembly named '{1}' not found.",
 147                                                 framework_dir, key_aname.Name);
 148                         }
 149                         return null;
 150                 }
 151
 152                 // Look for %(Identity).{dll|exe|..}
 153                 // if specific_version==true
 154                 //      resolve if assembly names match
 155                 // else
 156                 //      resolve the valid assembly
 157                 public ResolvedReference FindInDirectory (ITaskItem reference, string directory, string [] file_extensions, bool specific_version)
 158                 {
 159                         string filename = reference.ItemSpec;
 160                         int comma_pos = filename.IndexOf (',');
 161                         if (comma_pos >= 0)
 162                                 filename = filename.Substring (0, comma_pos);
 163
 164                         // Try as a filename
 165                         string path = Path.GetFullPath (Path.Combine (directory, filename));
 166                         AssemblyName aname = null;
 167                         if (specific_version && !TryGetAssemblyNameFromFullName (reference.ItemSpec, out aname))
 168                                 return null;
 169
 170                         ResolvedReference resolved_ref = ResolveReferenceForPath (path, reference, aname, null, SearchPath.Directory, specific_version);
 171                         if (resolved_ref != null)
 172                                 return resolved_ref;
 173
 174                         // try path + Include + {.dll|.exe|..}
 175                         foreach (string extn in file_extensions) {
 176                                 resolved_ref = ResolveReferenceForPath (path + extn, reference, aname, null, SearchPath.Directory, specific_version);
 177                                 if (resolved_ref != null)
 178                                         return resolved_ref;
 179                         }
 180
 181                         return null;
 182                 }
 183
 184                 // tries to resolve reference from the given file path, and compares assembly names
 185                 // if @specific_version == true, and logs accordingly
 186                 ResolvedReference ResolveReferenceForPath (string filename, ITaskItem reference, AssemblyName aname,
 187                                         string error_message, SearchPath spath, bool specific_version)
 188                 {
 189                         AssemblyName found_aname;
 190                         if (!TryGetAssemblyNameFromFile (filename, out found_aname)) {
 191                                 if (error_message != null)
 192                                         log.LogMessage (MessageImportance.Low, error_message);
 193                                 return null;
 194                         }
 195
 196                         if (!specific_version || AssemblyNamesCompatible (aname, found_aname, specific_version)) {
 197                                 // Check compatibility only if specific_version == true
 198                                 return GetResolvedReference (reference, filename, found_aname, true, spath);
 199                         } else {
 200                                 LogSearchMessage ("Considered '{0}', but assembly name '{1}' did not match the " +
 201                                                 "expected '{2}' (SpecificVersion={3})", filename, found_aname, aname, specific_version);
 202                                 log.LogMessage (MessageImportance.Low, "Assembly names are not compatible.");
 203                         }
 204
 205                         return null;
 206                 }
 207
 208                 TargetFrameworkAssemblies PopulateTargetFrameworkAssemblies (string directory)
 209                 {
 210                         TargetFrameworkAssemblies gac_asm = new TargetFrameworkAssemblies (directory);
 211                         foreach (string file in Directory.GetFiles (directory, "*.dll")) {
 212                                 AssemblyName aname;
 213                                 if (TryGetAssemblyNameFromFile (file, out aname))
 214                                         gac_asm.NameToAssemblyNameCache [aname.Name] =
 215                                                 new KeyValuePair<AssemblyName, string> (aname, file);
 216                         }
 217
 218                         return gac_asm;
 219                 }
 220
 221                 public ResolvedReference ResolveGacReference (ITaskItem reference, bool specific_version)
 222                 {
 223                         AssemblyName name;
 224                         if (!TryGetAssemblyNameFromFullName (reference.ItemSpec, out name))
 225                                 return null;
 226
 227                         if (!gac.ContainsKey (name.Name)) {
 228                                 LogSearchMessage ("Considered {0}, but could not find in the GAC.",
 229                                                 reference.ItemSpec);
 230                                 return null;
 231                         }
 232
 233                         if (name.Version != null) {
 234                                 string ret;
 235                                 if (gac [name.Name].TryGetValue (name.Version, out ret))
 236                                         return GetResolvedReference (reference, ret, name, false, SearchPath.Gac);
 237
 238                                 // not found
 239                                 if (specific_version) {
 240                                         LogSearchMessage ("Considered '{0}', but an assembly with the specific version not found.",
 241                                                         reference.ItemSpec);
 242                                         return null;
 243                                 }
 244                         }
 245
 246                         Version [] versions = new Version [gac [name.Name].Keys.Count];
 247                         gac [name.Name].Keys.CopyTo (versions, 0);
 248                         Array.Sort (versions, (IComparer <Version>) null);
 249                         Version highest = versions [versions.Length - 1];
 250                         //FIXME: the aname being used here isn't correct, its version should
 251                         //       actually match "highest"
 252                         return GetResolvedReference (reference, gac [name.Name] [highest], name, false, SearchPath.Gac);
 253                 }
 254
 255                 public ResolvedReference ResolvePkgConfigReference (ITaskItem reference, bool specific_version)
 256                 {
 257                         PackageAssemblyInfo pkg = null;
 258
 259                         if (specific_version) {
 260                                 pkg = PcCache.GetAssemblyLocation (reference.ItemSpec);
 261                         } else {
 262                                 // if not specific version, then just match simple name
 263                                 string name = reference.ItemSpec;
 264                                 if (name.IndexOf (',') > 0)
 265                                         name = name.Substring (0, name.IndexOf (','));
 266                                 pkg = PcCache.ResolveAssemblyName (name).FirstOrDefault ();
 267                         }
 268
 269                         if (pkg == null) {
 270                                 LogSearchMessage ("Considered {0}, but could not find in any pkg-config files.",
 271                                                 reference.ItemSpec);
 272                                 return null;
 273                         }
 274
 275                         AssemblyName aname;
 276                         if (!TryGetAssemblyNameFromFullName (pkg.FullName, out aname))
 277                                 return null;
 278
 279                         ResolvedReference rr = GetResolvedReference (reference, pkg.File, aname,
 280                                                 false, SearchPath.PkgConfig);
 281                         rr.FoundInSearchPathAsString = String.Format ("{{PkgConfig}} provided by package named {0}",
 282                                                         pkg.ParentPackage.Name);
 283
 284                         return rr;
 285                 }
 286
 287                 // HintPath has a valid assembly
 288                 // if specific_version==true
 289                 //      resolve if assembly names match
 290                 // else
 291                 //      resolve the valid assembly
 292                 public ResolvedReference ResolveHintPathReference (ITaskItem reference, bool specific_version)
 293                 {
 294                         string hintpath = reference.GetMetadata ("HintPath");
 295                         if (String.IsNullOrEmpty (hintpath)) {
 296                                 LogSearchMessage ("HintPath attribute not found");
 297                                 return null;
 298                         }
 299
 300                         if (!File.Exists (hintpath)) {
 301                                 log.LogMessage (MessageImportance.Low, "HintPath {0} does not exist.", hintpath);
 302                                 LogSearchMessage ("Considered {0}, but it does not exist.", hintpath);
 303                                 return null;
 304                         }
 305
 306                         AssemblyName aname;
 307                         if (!TryGetAssemblyNameFromFullName (reference.ItemSpec, out aname))
 308                                 return null;
 309
 310                         return ResolveReferenceForPath (hintpath, reference, aname,
 311                                                 String.Format ("File at HintPath {0}, is either an invalid assembly or the file does not exist.", hintpath),
 312                                                 SearchPath.HintPath, specific_version);
 313                 }
 314
 315                 public bool TryGetAssemblyNameFromFile (string filename, out AssemblyName aname)
 316                 {
 317                         aname = null;
 318                         filename = Path.GetFullPath (filename);
 319                         try {
 320                                 aname = AssemblyName.GetAssemblyName (filename);
 321                         } catch (FileNotFoundException) {
 322                                 LogSearchMessage ("Considered '{0}' as a file, but the file does not exist",
 323                                                 filename);
 324                         } catch (BadImageFormatException) {
 325                                 LogSearchMessage ("Considered '{0}' as a file, but it is an invalid assembly",
 326                                                 filename);
 327                         }
 328
 329                         return aname != null;
 330                 }
 331
 332                 bool TryGetAssemblyNameFromFullName (string full_name, out AssemblyName aname)
 333                 {
 334                         aname = null;
 335                         try {
 336                                 aname = new AssemblyName (full_name);
 337                         } catch (FileLoadException) {
 338                                 LogSearchMessage ("Considered '{0}' as an assembly name, but it is invalid.", full_name);
 339                         }
 340
 341                         return aname != null;
 342                 }
 343
 344                 internal static bool AssemblyNamesCompatible (AssemblyName a, AssemblyName b, bool specificVersion)
 345                 {
 346                         return AssemblyNamesCompatible (a, b, specificVersion, true);
 347                 }
 348
 349                 // if @specificVersion is true then match full name, else just the simple name
 350                 internal static bool AssemblyNamesCompatible (AssemblyName a, AssemblyName b, bool specificVersion,
 351                                 bool ignoreCase)
 352                 {
 353                         if (String.Compare (a.Name, b.Name, ignoreCase) != 0)
 354                                 return false;
 355
 356                         if (!specificVersion)
 357                                 // ..and simple names match
 358                                 return true;
 359
 360                         if (a.CultureInfo != null && !a.CultureInfo.Equals (b.CultureInfo))
 361                                 return false;
 362
 363                         if (a.Version != null && a.Version != b.Version)
 364                                 return false;
 365
 366                         byte [] a_bytes = a.GetPublicKeyToken ();
 367                         byte [] b_bytes = b.GetPublicKeyToken ();
 368
 369                         bool a_is_empty = (a_bytes == null || a_bytes.Length == 0);
 370                         bool b_is_empty = (b_bytes == null || b_bytes.Length == 0);
 371
 372                         if (a_is_empty && b_is_empty)
 373                                 return true;
 374
 375                         if (a_is_empty || b_is_empty)
 376                                 return false;
 377
 378                         for (int i = 0; i < a_bytes.Length; i++)
 379                                 if (a_bytes [i] != b_bytes [i])
 380                                         return false;
 381
 382                         return true;
 383                 }
 384
 385                 public bool IsStrongNamed (AssemblyName name)
 386                 {
 387                         return (name.Version != null &&
 388                                         name.GetPublicKeyToken () != null &&
 389                                         name.GetPublicKeyToken ().Length != 0);
 390                 }
 391
 392                 // FIXME: to get default values of CopyLocal, compare with TargetFrameworkDirectories
 393
 394                 // If metadata 'Private' is present then use that or use @default_copy_local_value
 395                 // as the value for CopyLocal
 396                 internal ResolvedReference GetResolvedReference (ITaskItem reference, string filename,
 397                                 AssemblyName aname, bool default_copy_local_value, SearchPath search_path)
 398                 {
 399                         string pvt = reference.GetMetadata ("Private");
 400
 401                         bool copy_local = default_copy_local_value;
 402                         if (!String.IsNullOrEmpty (pvt))
 403                                 //FIXME: log a warning for invalid value
 404                                 Boolean.TryParse (pvt, out copy_local);
 405
 406                         ITaskItem new_item = new TaskItem (reference);
 407                         new_item.ItemSpec = filename;
 408                         return new ResolvedReference (new_item, aname, copy_local, search_path, reference.ItemSpec);
 409                 }
 410
 411                 public void LogSearchMessage (string msg, params object [] args)
 412                 {
 413                         search_log.Add (String.Format (msg, args));
 414                 }
 415
 416                 public void LogSearchLoggerMessages (MessageImportance importance)
 417                 {
 418                         foreach (string msg in search_log)
 419                                 log.LogMessage (importance, msg);
 420                 }
 421
 422                 public TaskLoggingHelper Log {
 423                         set {
 424                                 log = value;
 425                                 PcFileCacheContext.Log = value;
 426                         }
 427                 }
 428
 429                 static LibraryPcFileCache PcCache  {
 430                         get {
 431                                 if (cache == null) {
 432                                         var context = new PcFileCacheContext ();
 433                                         cache = new LibraryPcFileCache (context);
 434                                         cache.Update ();
 435                                 }
 436
 437                                 return cache;
 438                         }
 439                 }
 440         }
 441
 442         class TargetFrameworkAssemblies {
 443                 public string Path;
 444
 445                 // assembly (simple) name -> (AssemblyName, file path)
 446                 public Dictionary <string, KeyValuePair<AssemblyName, string>> NameToAssemblyNameCache;
 447
 448                 public TargetFrameworkAssemblies (string path)
 449                 {
 450                         this.Path = path;
 451                         NameToAssemblyNameCache = new Dictionary<string, KeyValuePair<AssemblyName, string>> (
 452                                         StringComparer.InvariantCultureIgnoreCase);
 453                 }
 454         }
 455
 456         class PcFileCacheContext : IPcFileCacheContext<LibraryPackageInfo>
 457         {
 458                 public static TaskLoggingHelper Log;
 459
 460                 // In the implementation of this method, the host application can extract
 461                 // information from the pc file and store it in the PackageInfo object
 462                 public void StoreCustomData (PcFile pcfile, LibraryPackageInfo pkg)
 463                 {
 464                 }
 465
 466                 // Should return false if the provided package does not have required
 467                 // custom data
 468                 public bool IsCustomDataComplete (string pcfile, LibraryPackageInfo pkg)
 469                 {
 470                         return true;
 471                 }
 472
 473                 // Called to report errors
 474                 public void ReportError (string message, Exception ex)
 475                 {
 476                         Log.LogMessage (MessageImportance.Low, "Error loading pkg-config files: {0} : {1}",
 477                                         message, ex.ToString ());
 478                 }
 479         }
 480
 481         enum SearchPath
 482         {
 483                 Gac,
 484                 TargetFrameworkDirectory,
 485                 CandidateAssemblies,
 486                 HintPath,
 487                 Directory,
 488                 RawFileName,
 489                 PkgConfig
 490         }
 491 }
 492
 493
 494
 495 #endif