mcs/tools/gacutil/driver.cs

   1 //
   2 // Mono.Tools.GacUtil
   3 //
   4 // Author(s):
   5 //  Todd Berman <tberman@sevenl.net>
   6 //  Jackson Harper <jackson@ximian.com>
   7 //
   8 // Copyright 2003, 2004 Todd Berman
   9 // Copyright 2004 Novell, Inc (http://www.novell.com)
  10 //
  11
  12
  13 using System;
  14 using System.IO;
  15 using System.Text;
  16 using System.Reflection;
  17 using System.Collections;
  18 using System.Globalization;
  19 using System.Runtime.InteropServices;
  20
  21 using Mono.Security;
  22
  23 namespace Mono.Tools {
  24
  25         public class Driver {
  26
  27                 private enum Command {
  28                         Unknown,
  29                         Install,
  30                         InstallFromList,
  31                         Uninstall,
  32                         UninstallFromList,
  33                         UninstallSpecific,
  34                         List,
  35                         Help
  36                 }
  37
  38                 private static bool silent;
  39
  40                 public static int Main (string [] args)
  41                 {
  42                         if (args.Length == 0)
  43                                 Usage ();
  44
  45                         Command command = Command.Unknown;
  46                         string command_str = null;
  47
  48                         string libdir;
  49                         string name, package, gacdir, root;
  50                         name = package = root = gacdir = null;
  51                         bool check_refs = false;
  52
  53                         // Check for silent arg first so we can supress
  54                         // warnings during command line parsing
  55                         if (Array.IndexOf (args, "/silent") > -1 || Array.IndexOf (args, "-silent") > -1)
  56                                 silent = true;
  57
  58                         for (int i=0; i<args.Length; i++) {
  59                                 if (IsSwitch (args [i])) {
  60
  61                                         // for cmd line compatibility with other gacutils
  62                                         // we always force it though
  63                                         if (args [i] == "-f" || args [i] == "/f")
  64                                                 continue;
  65
  66                                         // Ignore this option for now, although we might implement it someday
  67                                         if (args [i] == "/r") {
  68                                                 WriteLine ("WARNING: gacutil does not support traced references." +
  69                                                         "This option is being ignored.");
  70                                                 i += 3;
  71                                                 continue;
  72                                         }
  73
  74                                         // This is already handled we just dont want to choke on it
  75                                         if (args [i] == "-silent" || args [i] == "/silent")
  76                                                 continue;
  77
  78                                         if (args [i] == "-check_refs" || args [i] == "/check_refs") {
  79                                                 check_refs = true;
  80                                                 continue;
  81                                         }
  82
  83                                         if (command == Command.Unknown) {
  84                                                 command = GetCommand (args [i]);
  85                                                 if (command != Command.Unknown) {
  86                                                         command_str = args [i];
  87                                                         continue;
  88                                                 }
  89                                         }
  90
  91                                         if (i + 1 >= args.Length) {
  92                                                 Console.WriteLine ("Option " + args [i] + " takes 1 argument");
  93                                                 return 1;
  94                                         }
  95
  96                                         switch (args [i]) {
  97                                         case "-package":
  98                                         case "/package":
  99                                                 package = args [++i];
 100                                                 break;
 101                                         case "-root":
 102                                         case "/root":
 103                                                 root = args [++i];
 104                                                 break;
 105                                         case "-gacdir":
 106                                         case "/gacdir":
 107                                                 gacdir = args [++i];
 108                                                 break;
 109                                         }
 110                                         continue;
 111                                 }
 112                                 if (name == null)
 113                                         name = args [i];
 114                                 else
 115                                         name += args [i];
 116                         }
 117
 118                         if (command == Command.Unknown && IsSwitch (args [0])) {
 119                                 Console.WriteLine ("Unknown command: " + args [0]);
 120                                 return 1;
 121                         } else if (command == Command.Unknown) {
 122                                 Usage ();
 123                         } else if (command == Command.Help) {
 124                                 ShowHelp (true);
 125                                 return 1;
 126                         }
 127
 128                         if (gacdir == null) {
 129                                 gacdir = GetGacDir ();
 130                                 libdir = GetLibDir ();
 131                         } else {
 132                                 gacdir = EnsureLib (gacdir);
 133                                 libdir = Path.Combine (gacdir, "mono");
 134                                 gacdir = Path.Combine (libdir, "gac");
 135                         }
 136
 137                         string link_gacdir = gacdir;
 138                         string link_libdir = libdir;
 139                         if (root != null) {
 140                                 libdir = Path.Combine (root, "mono");
 141                                 gacdir = Path.Combine (libdir, "gac");
 142                         }
 143
 144                         switch (command) {
 145                         case Command.Install:
 146                                 if (name == null) {
 147                                         WriteLine ("Option " + command_str + " takes 1 argument");
 148                                         return 1;
 149                                 }
 150                                 if (!Install (check_refs, name, package, gacdir, link_gacdir, libdir, link_libdir))
 151                                         return 1;
 152                                 break;
 153                         case Command.InstallFromList:
 154                                 if (name == null) {
 155                                         WriteLine ("Option " + command_str + " takes 1 argument");
 156                                         return 1;
 157                                 }
 158                                 if (!InstallFromList (check_refs, name, package, gacdir, link_gacdir, libdir, link_libdir))
 159                                         return 1;
 160                                 break;
 161                         case Command.Uninstall:
 162                                 if (name == null) {
 163                                         WriteLine ("Option " + command_str + " takes 1 argument");
 164                                         return 1;
 165                                 }
 166                                 if (!Uninstall (name, package, gacdir, libdir))
 167                                         Environment.Exit (1);
 168                                 break;
 169                         case Command.UninstallFromList:
 170                                 if (name == null) {
 171                                         WriteLine ("Option " + command_str + " takes 1 argument");
 172                                         return 1;
 173                                 }
 174                                 if (!UninstallFromList (name, package, gacdir, libdir))
 175                                         return 1;
 176                                 break;
 177                         case Command.UninstallSpecific:
 178                                 if (name == null) {
 179                                         WriteLine ("Opetion " + command_str + " takes 1 argument");
 180                                         return 1;
 181                                 }
 182                                 if (!UninstallSpecific (name, package, gacdir, libdir))
 183                                         return 1;
 184                                 break;
 185                         case Command.List:
 186                                 List (name, gacdir);
 187                                 break;
 188                         }
 189
 190                         return 0;
 191                 }
 192
 193                 private static bool Install (bool check_refs, string name, string package,
 194                                 string gacdir, string link_gacdir, string libdir, string link_libdir)
 195                 {
 196                         string failure_msg = "Failure adding assembly to the cache: ";
 197
 198                         if (!File.Exists (name)) {
 199                                 WriteLine (failure_msg + "The system cannot find the file specified.");
 200                                 Environment.Exit (1);
 201                         }
 202
 203                         AssemblyName an = null;
 204                         byte [] pub_tok;
 205
 206                         try {
 207                                 an = AssemblyName.GetAssemblyName (name);
 208                         } catch {
 209                                 WriteLine (failure_msg + "The file specified is not a valid assembly.");
 210                                 return false;
 211                         }
 212
 213                         pub_tok = an.GetPublicKeyToken ();
 214                         if (pub_tok == null || pub_tok.Length == 0) {
 215                                 WriteLine (failure_msg + "Attempt to install an assembly without a strong name.");
 216                                 return false;
 217                         }
 218
 219                         if (check_refs && !CheckReferencedAssemblies (an)) {
 220                                 WriteLine (failure_msg + "Attempt to install an assembly that references non " +
 221                                                 "strong named assemblies with -check_refs enabled.");
 222                                 return false;
 223                         }
 224
 225                         string [] siblings = { ".config", ".mdb" };
 226                         string version_token = an.Version + "_" +
 227                                                an.CultureInfo.Name.ToLower (CultureInfo.InvariantCulture) + "_" +
 228                                                GetStringToken (pub_tok);
 229                         string full_path = Path.Combine (Path.Combine (gacdir, an.Name), version_token);
 230                         string asmb_file = Path.GetFileName (name);
 231                         string asmb_path = Path.Combine (full_path, asmb_file);
 232
 233                         try {
 234                                 if (Directory.Exists (full_path)) {
 235                                         // Wipe out the directory. This way we ensure old assemblies
 236                                         // config files, and AOTd files are removed.
 237                                         Directory.Delete (full_path, true);
 238                                 }
 239                                 Directory.CreateDirectory (full_path);
 240                         } catch {
 241                                 WriteLine (failure_msg + "gac directories could not be created, " +
 242                                                 "possibly permission issues.");
 243                                 return false;
 244                         }
 245
 246                         File.Copy (name, asmb_path, true);
 247
 248                         foreach (string ext in siblings) {
 249                                 string sibling = String.Concat (name, ext);
 250                                 if (File.Exists (sibling))
 251                                         File.Copy (sibling, String.Concat (asmb_path, ext), true);
 252                         }
 253
 254                         if (package != null) {
 255                                 string link_path = Path.Combine (Path.Combine (link_gacdir, an.Name), version_token);
 256                                 string ref_dir = Path.Combine (libdir, package);
 257                                 string ref_path = Path.Combine (ref_dir, asmb_file);
 258
 259                                 if (File.Exists (ref_path))
 260                                         File.Delete (ref_path);
 261                                 try {
 262                                         Directory.CreateDirectory (ref_dir);
 263                                 } catch {
 264                                         WriteLine ("ERROR: Could not create package dir file.");
 265                                         Environment.Exit (1);
 266                                 }
 267                                 Symlink (name, Path.Combine (link_path, asmb_file), ref_path);
 268
 269                                 WriteLine ("Package exported to: " + ref_path + " -> " +
 270                                                 Path.Combine (link_path, asmb_file));
 271
 272                         }
 273
 274                         WriteLine ("{0} installed into the gac ({1})", an.Name, gacdir);
 275                         return true;
 276                 }
 277
 278                 private static bool Uninstall (string name, string package, string gacdir, string libdir)
 279                 {
 280                         string [] assembly_pieces = name.Split (new char[] { ',' });
 281                         Hashtable asm_info = new Hashtable ();
 282
 283                         foreach (string item in assembly_pieces) {
 284                                 string[] pieces = item.Trim ().Split (new char[] { '=' }, 2);
 285                                 if(pieces.Length == 1)
 286                                         asm_info ["assembly"] = pieces [0];
 287                                 else
 288                                         asm_info [pieces[0].Trim ().ToLower (CultureInfo.InvariantCulture)] = pieces [1];
 289                         }
 290
 291                         string asmdir = Path.Combine (gacdir, (string) asm_info ["assembly"]);
 292                         if (!Directory.Exists (asmdir)) {
 293                                 WriteLine ("No assemblies found that match: " + name);
 294                                 return false;
 295                         }
 296
 297                         string searchString = GetSearchString (asm_info);
 298                         string [] directories = Directory.GetDirectories (asmdir, searchString);
 299
 300                         foreach (string dir in directories) {
 301                                 Directory.Delete (dir, true);
 302                                 if (package != null) {
 303                                         string link_dir = Path.Combine (libdir, package);
 304                                         string link = Path.Combine (link_dir, (string) asm_info ["assembly"] + ".dll");
 305                                         File.Delete (link);
 306                                         if (Directory.GetFiles (link_dir).Length == 0) {
 307                                                 WriteLine ("Cleaning package directory, it is empty.");
 308                                                 Directory.Delete (link_dir);
 309                                         }
 310                                 }
 311                                 WriteLine ("Assembly removed from the gac.");
 312                         }
 313
 314                         if(Directory.GetDirectories (asmdir).Length == 0) {
 315                                 WriteLine ("Cleaning assembly dir, its empty");
 316                                 Directory.Delete (asmdir);
 317                         }
 318
 319                         return true;
 320                 }
 321
 322                 private static bool UninstallSpecific (string name, string package,
 323                                 string gacdir, string libdir)
 324                 {
 325                         string failure_msg = "Failure to remove assembly from the cache: ";
 326
 327                         if (!File.Exists (name)) {
 328                                 WriteLine (failure_msg + "The system cannot find the file specified.");
 329                                 return false;
 330                         }
 331
 332                         AssemblyName an = null;
 333
 334                         try {
 335                                 an = AssemblyName.GetAssemblyName (name);
 336                         } catch {
 337                                 WriteLine (failure_msg + "The file specified is not a valid assembly.");
 338                                 return false;
 339                         }
 340
 341                         return Uninstall (an.FullName.Replace (" ", String.Empty),
 342                                         package, gacdir, libdir);
 343                 }
 344
 345                 private static void List (string name, string gacdir)
 346                 {
 347                         WriteLine ("The following assemblies are installed into the GAC:");
 348
 349                         if (name != null) {
 350                                 FilteredList (name, gacdir);
 351                                 return;
 352                         }
 353
 354                         int count = 0;
 355                         DirectoryInfo gacinfo = new DirectoryInfo (gacdir);
 356                         foreach (DirectoryInfo parent in gacinfo.GetDirectories ()) {
 357                                 foreach (DirectoryInfo dir in parent.GetDirectories ()) {
 358                                         WriteLine (AsmbNameFromVersionString (parent.Name, dir.Name));
 359                                         count++;
 360                                 }
 361                         }
 362                         WriteLine ("Number of items = " + count);
 363                 }
 364
 365                 private static void FilteredList (string name, string gacdir)
 366                 {
 367                         string [] assembly_pieces = name.Split (new char[] { ',' });
 368                         Hashtable asm_info = new Hashtable ();
 369
 370                         foreach (string item in assembly_pieces) {
 371                                 string[] pieces = item.Trim ().Split (new char[] { '=' }, 2);
 372                                 if(pieces.Length == 1)
 373                                         asm_info ["assembly"] = pieces [0];
 374                                 else
 375                                         asm_info [pieces[0].Trim ().ToLower (CultureInfo.InvariantCulture)] = pieces [1];
 376                         }
 377
 378                         string asmdir = Path.Combine (gacdir, (string) asm_info ["assembly"]);
 379                         if (!Directory.Exists (asmdir)) {
 380                                 WriteLine ("Number of items = 0");
 381                                 return;
 382                         }
 383                         string search = GetSearchString (asm_info);
 384                         string [] dir_list = Directory.GetDirectories (asmdir, search);
 385
 386                         int count = 0;
 387                         foreach (string dir in dir_list) {
 388                                 WriteLine (AsmbNameFromVersionString ((string) asm_info ["assembly"],
 389                                                 new DirectoryInfo (dir).Name));
 390                                 count++;
 391                         }
 392                         WriteLine ("Number of items = " + count);
 393                 }
 394
 395                 private static bool InstallFromList (bool check_refs, string list_file, string package,
 396                                 string gacdir, string link_gacdir, string libdir, string link_libdir)
 397                 {
 398                         StreamReader s = null;
 399                         int processed, failed;
 400
 401                         processed = failed = 0;
 402
 403                         try {
 404                                 s = new StreamReader (list_file);
 405
 406                                 string line;
 407                                 while ((line = s.ReadLine ()) != null) {
 408                                         if (!Install (check_refs, line, package, gacdir, link_gacdir,
 409                                                             libdir, link_libdir))
 410                                                 failed++;
 411                                         processed++;
 412
 413                                 }
 414                         } catch (IOException ioe) {
 415                                 WriteLine ("Failed to open assemblies list file " + list_file + ".");
 416                                 return false;
 417                         } finally {
 418                                 if (s != null)
 419                                         s.Close ();
 420                         }
 421
 422                         return true;
 423                 }
 424
 425                 private static bool UninstallFromList (string list_file, string package,
 426                                 string gacdir, string libdir)
 427                 {
 428                         StreamReader s = null;
 429                         int processed, failed;
 430
 431                         processed = failed = 0;
 432
 433                         try {
 434                                 s = new StreamReader (list_file);
 435
 436                                 string line;
 437                                 while ((line = s.ReadLine ()) != null) {
 438                                         if (!Uninstall (line, package, gacdir, libdir))
 439                                                 failed++;
 440                                         processed++;
 441                                 }
 442                         } catch (IOException ioe) {
 443                                 WriteLine ("Failed to open assemblies list file " + list_file + ".");
 444                                 return false;
 445                         } finally {
 446                                 if (s != null)
 447                                         s.Close ();
 448                         }
 449
 450                         return true;
 451                 }
 452
 453                 private static bool CheckReferencedAssemblies (AssemblyName an)
 454                 {
 455                         AppDomain d = null;
 456                         try {
 457                                 Assembly a = Assembly.LoadFrom (an.CodeBase);
 458                                 AssemblyName corlib = typeof (object).Assembly.GetName ();
 459
 460                                 foreach (AssemblyName ref_an in a.GetReferencedAssemblies ()) {
 461                                         if (ref_an.Name == corlib.Name) // Just do a string compare so we can install on diff versions
 462                                                 continue;
 463                                         byte [] pt = ref_an.GetPublicKeyToken ();
 464                                         if (pt == null || pt.Length == 0) {
 465                                                 WriteLine ("Assembly " + ref_an.Name + " is not strong named.");
 466                                                 return false;
 467                                         }
 468                                 }
 469                         } catch  (Exception e) {
 470                                 WriteLine (e.ToString ()); // This should be removed pre beta3
 471                                 return false;
 472                         } finally {
 473                                 if (d != null) {
 474                                         try {
 475                                                 AppDomain.Unload (d);
 476                                         } catch { }
 477                                 }
 478                         }
 479
 480                         return true;
 481                 }
 482
 483                 private static string GetSearchString (Hashtable asm_info)
 484                 {
 485                         if (asm_info.Keys.Count == 1)
 486                                 return "*";
 487                         string version, culture, token;
 488
 489                         version = asm_info ["version"] as string;
 490                         version = (version == null ? "*" : version);
 491                         culture = asm_info ["culture"] as string;
 492                         culture = (culture == null ? "*" : culture.ToLower (CultureInfo.InvariantCulture));
 493                         token = asm_info ["publickeytoken"] as string;
 494                         token = (token == null ? "*" : token.ToLower (CultureInfo.InvariantCulture));
 495
 496                         return String.Format ("{0}_{1}_{2}", version, culture, token);
 497                 }
 498
 499                 private static string AsmbNameFromVersionString (string name, string str)
 500                 {
 501                         string [] pieces = str.Split ('_');
 502                         return String.Format ("{0}, Version={1}, Culture={2}, PublicKeyToken={3}",
 503                                         name, pieces [0], (pieces [1] == String.Empty ? "neutral" : pieces [1]),
 504                                         pieces [2]);
 505                 }
 506
 507                 private static bool IsSwitch (string arg)
 508                 {
 509                         return (arg [0] == '-' || arg [0] == '/');
 510                 }
 511
 512                 private static Command GetCommand (string arg)
 513                 {
 514                         Command c = Command.Unknown;
 515
 516                         switch (arg) {
 517                         case "-i":
 518                         case "/i":
 519                         case "--install":
 520                                 c = Command.Install;
 521                                 break;
 522                         case "-il":
 523                         case "/il":
 524                         case "--install-from-list":
 525                                 c = Command.InstallFromList;
 526                                 break;
 527                         case "-u":
 528                         case "/u":
 529                         case "/uf":
 530                         case "--uninstall":
 531                                 c = Command.Uninstall;
 532                                 break;
 533                         case "-ul":
 534                         case "/ul":
 535                         case "--uninstall-from-list":
 536                                 c = Command.UninstallFromList;
 537                                 break;
 538                         case "-us":
 539                         case "/us":
 540                         case "--uninstall-specific":
 541                                 c = Command.UninstallSpecific;
 542                                 break;
 543                         case "-l":
 544                         case "/l":
 545                         case "--list":
 546                                 c = Command.List;
 547                                 break;
 548                         case "-?":
 549                         case "/?":
 550                         case "--help":
 551                                 c = Command.Help;
 552                                 break;
 553                         }
 554                         return c;
 555                 }
 556
 557                 // name = name of dll being installed
 558                 // oldpath = path the symlink points to -- cannot be assumed to be a valid file
 559                 // newpath = name of symlink
 560                 private static void Symlink (string name, string oldpath, string newpath) {
 561                         if (Path.DirectorySeparatorChar == '/') {
 562                                 symlink (oldpath, newpath);
 563                         } else {
 564                                 File.Copy (name, newpath);
 565                         }
 566                 }
 567
 568                 [DllImport ("libc", SetLastError=true)]
 569                 public static extern int symlink (string oldpath, string newpath);
 570
 571                 private static string GetGacDir () {
 572                         PropertyInfo gac = typeof (System.Environment).GetProperty ("GacPath",
 573                                         BindingFlags.Static|BindingFlags.NonPublic);
 574                         if (gac == null) {
 575                                 WriteLine ("ERROR: Mono runtime not detected, please use " +
 576                                                 "the mono runtime for gacutil.exe");
 577                                 Environment.Exit (1);
 578                         }
 579                         MethodInfo get_gac = gac.GetGetMethod (true);
 580                         return (string) get_gac.Invoke (null, null);
 581                 }
 582
 583                 private static string GetLibDir () {
 584                         MethodInfo libdir = typeof (System.Environment).GetMethod ("internalGetGacPath",
 585                                         BindingFlags.Static|BindingFlags.NonPublic);
 586                         if (libdir == null) {
 587                                 WriteLine ("ERROR: Mono runtime not detected, please use " +
 588                                                 "the mono runtime for gacutil.exe");
 589                                 Environment.Exit (1);
 590                         }
 591                         return Path.Combine ((string)libdir.Invoke (null, null), "mono");
 592                 }
 593
 594                 private static string GetStringToken (byte[] tok)
 595                 {
 596                         StringBuilder sb = new StringBuilder ();
 597                         for (int i = 0; i < tok.Length ; i++)
 598                                 sb.Append (tok[i].ToString ("x2"));
 599                         return sb.ToString ();
 600                 }
 601
 602                 private static string CombinePaths (string a, string b)
 603                 {
 604                         string dsc = Path.DirectorySeparatorChar.ToString ();
 605                         string sep = (a.EndsWith (dsc) ? String.Empty : dsc);
 606                         string end = (b.StartsWith (dsc) ? b.Substring (1) : b);
 607                         return String.Concat (a, sep, end);
 608                 }
 609
 610                 private static string EnsureLib (string dir)
 611                 {
 612                         DirectoryInfo d = new DirectoryInfo (dir);
 613                         if (d.Name == "lib")
 614                                 return dir;
 615                         return Path.Combine (dir, "lib");
 616                 }
 617
 618                 private static void WriteLine ()
 619                 {
 620                         if (silent)
 621                                 return;
 622                         Console.WriteLine ();
 623                 }
 624
 625                 private static void WriteLine (string line)
 626                 {
 627                         if (silent)
 628                                 return;
 629                         Console.WriteLine (line);
 630                 }
 631
 632                 private static void WriteLine (string line, params object [] p)
 633                 {
 634                         if (silent)
 635                                 return;
 636                         Console.WriteLine (line, p);
 637                 }
 638
 639                 private static void Usage ()
 640                 {
 641                         ShowHelp (false);
 642                         Environment.Exit (1);
 643                 }
 644
 645                 private static void ShowHelp (bool detailed)
 646                 {
 647                         WriteLine ("Usage: gacutil.exe <commands> [ <options> ]");
 648                         WriteLine ("Commands:");
 649
 650                         WriteLine ("-i <assembly_path> [-check_refs] [-package NAME] [-root ROOTDIR] [-gacdir GACDIR]");
 651                         WriteLine ("\tInstalls an assembly into the global assembly cache.");
 652                         if (detailed) {
 653                                 WriteLine ("\t<assembly_path> is the name of the file that contains the " +
 654                                                 "\tassembly manifest\n" +
 655                                                 "\tExample: -i myDll.dll");
 656                         }
 657                         WriteLine ();
 658
 659                         WriteLine ("-il <assembly_list_file> [-check_refs] [-package NAME] [-root ROOTDIR] [-gacdir GACDIR]");
 660                         WriteLine ("\tInstalls one or more assemblies into the global assembly cache.");
 661                         if (detailed) {
 662                                 WriteLine ("\t<assembly_list_file> is the path to a test file containing a list of\n" +
 663                                                 "\tassembly file paths on separate lines.\n" +
 664                                                 "\tExample -il assembly_list.txt\n" +
 665                                                 "\t\tassembly_list.txt contents:\n" +
 666                                                 "\t\tassembly1.dll\n" +
 667                                                 "\t\tassembly2.dll");
 668                         }
 669                         WriteLine ();
 670
 671                         WriteLine ("-u <assembly_display_name> [-package NAME] [-root ROOTDIR] [-gacdir GACDIR]");
 672                         WriteLine ("\tUninstalls an assembly from the global assembly cache.");
 673                         if (detailed) {
 674                                 WriteLine ("\t<assembly_display_name> is the name of the assembly (partial or\n" +
 675                                                 "\tfully qualified) to remove from the global assembly cache. If a \n" +
 676                                                 "\tpartial name is specified all matching assemblies will be uninstalled.\n" +
 677                                                 "\tExample: -u myDll,Version=1.2.1.0");
 678                         }
 679                         WriteLine ();
 680
 681                         WriteLine ("-ul <assembly_list_file> [-package NAME] [-root ROOTDIR] [-gacdir GACDIR]");
 682                         WriteLine ("\tUninstalls one or more assemblies from the global assembly cache.");
 683                         if (detailed) {
 684                                 WriteLine ("\t<assembly_list_file> is the path to a test file containing a list of\n" +
 685                                                 "\tassembly names on separate lines.\n" +
 686                                                 "\tExample -ul assembly_list.txt\n" +
 687                                                 "\t\tassembly_list.txt contents:\n" +
 688                                                 "\t\tassembly1,Version=1.0.0.0,Culture=en,PublicKeyToken=0123456789abcdef\n" +
 689                                                 "\t\tassembly2,Version=2.0.0.0,Culture=en,PublicKeyToken=0123456789abcdef");
 690                         }
 691                         WriteLine ();
 692
 693                         WriteLine ("-us <assembly_path> [-package NAME] [-root ROOTDIR] [-gacdir GACDIR]");
 694                         WriteLine ("\tUninstalls an assembly using the specifed assemblies full name.");
 695                         if (detailed) {
 696                                 WriteLine ("\t<assembly path> is the path to an assembly. The full assembly name\n" +
 697                                                 "\tis retrieved from the specified assembly if there is an assembly in\n" +
 698                                                 "\tthe GAC with a matching name, it is removed.\n" +
 699                                                 "\tExample: -us myDll.dll");
 700                         }
 701                         WriteLine ();
 702
 703                         WriteLine ("-l [assembly_name] [-root ROOTDIR] [-gacdir GACDIR]");
 704                         WriteLine ("\tLists the contents of the global assembly cache.");
 705                         if (detailed) {
 706                                 WriteLine ("\tWhen the <assembly_name> parameter is specified only matching\n" +
 707                                                 "\tassemblies are listed.");
 708                         }
 709                         WriteLine ();
 710
 711                         WriteLine ("-?");
 712                         WriteLine ("\tDisplays a detailed help screen");
 713                         WriteLine ();
 714
 715                         if (!detailed)
 716                                 return;
 717
 718                         WriteLine ("Options:");
 719                         WriteLine ("-package <NAME>");
 720                         WriteLine ("\tUsed to create a directory in prefix/lib/mono with the name NAME, and a\n" +
 721                                         "\tsymlink is created from NAME/assembly_name to the assembly on the GAC.\n" +
 722                                         "\tThis is used so developers can reference a set of libraries at once.");
 723                         WriteLine ();
 724
 725                         WriteLine ("-gacdir <GACDIR>");
 726                         WriteLine ("\tUsed to specify the GACs base directory. Once an assembly has been installed\n" +
 727                                         "\tto a non standard gacdir the MONO_GAC_PREFIX environment variable must be used\n" +
 728                                         "\tto access the assembly.");
 729                         WriteLine ();
 730
 731                         WriteLine ("-root <ROOTDIR>");
 732                         WriteLine ("\tUsed by developers integrating this with automake tools or packaging tools\n" +
 733                                         "\tthat require a prefix directory to  be specified. The root represents the\n" +
 734                                         "\t\"libdir\" component of a prefix (typically prefix/lib).");
 735                         WriteLine ();
 736
 737                         WriteLine ("-check_refs");
 738                         WriteLine ("\tUsed to ensure that the assembly being installed into the GAC does not\n" +
 739                                         "\treference any non strong named assemblies. Assemblies being installed to\n" +
 740                                         "\tthe GAC should not reference non strong named assemblies, however the is\n" +
 741                                         "\tan optional check.");
 742
 743                         WriteLine ();
 744                         WriteLine ("Ignored Options:");
 745                         WriteLine ("-f");
 746                         WriteLine ("\tThe Mono gacutil ignores the -f option to maintian commandline compatibility with");
 747                         WriteLine ("\tother gacutils. gacutil will always force the installation of a new assembly.");
 748
 749                         WriteLine ();
 750                         WriteLine ("-r <reference_scheme> <reference_id> <description>");
 751                         WriteLine ("\tThe Mono gacutil has not implemented traced references and will emit a warning");
 752                         WriteLine ("\twhen this option is used.");
 753                 }
 754         }
 755 }
 756