mcs/tools/mkbundle/mkbundle.cs

   1 //
   2 // mkbundle: tool to create bundles.
   3 //
   4 // Based on the `make-bundle' Perl script written by Paolo Molaro (lupus@debian.org)
   5 //
   6 // Author:
   7 //   Miguel de Icaza
   8 //
   9 // (C) Novell, Inc 2004
  10 //
  11 using System;
  12 using System.Diagnostics;
  13 using System.Xml;
  14 using System.Collections.Generic;
  15 using System.IO;
  16 using System.IO.Compression;
  17 using System.Runtime.InteropServices;
  18 using System.Text;
  19 using IKVM.Reflection;
  20
  21
  22 using System.Threading.Tasks;
  23
  24 class MakeBundle {
  25         static string output = "a.out";
  26         static string object_out = null;
  27         static List<string> link_paths = new List<string> ();
  28         static bool autodeps = false;
  29         static bool keeptemp = false;
  30         static bool compile_only = false;
  31         static bool static_link = false;
  32         static string config_file = null;
  33         static string machine_config_file = null;
  34         static string config_dir = null;
  35         static string style = "linux";
  36         static bool compress;
  37         static bool nomain;
  38         static bool? use_dos2unix = null;
  39         static bool skip_scan;
  40         static string ctor_func;
  41
  42         static int Main (string [] args)
  43         {
  44                 List<string> sources = new List<string> ();
  45                 int top = args.Length;
  46                 link_paths.Add (".");
  47
  48                 DetectOS ();
  49
  50                 for (int i = 0; i < top; i++){
  51                         switch (args [i]){
  52                         case "--help": case "-h": case "-?":
  53                                 Help ();
  54                                 return 1;
  55
  56                         case "-c":
  57                                 compile_only = true;
  58                                 break;
  59
  60                         case "-o":
  61                                 if (i+1 == top){
  62                                         Help ();
  63                                         return 1;
  64                                 }
  65                                 output = args [++i];
  66                                 break;
  67
  68                         case "-oo":
  69                                 if (i+1 == top){
  70                                         Help ();
  71                                         return 1;
  72                                 }
  73                                 object_out = args [++i];
  74                                 break;
  75
  76                         case "-L":
  77                                 if (i+1 == top){
  78                                         Help ();
  79                                         return 1;
  80                                 }
  81                                 link_paths.Add (args [++i]);
  82                                 break;
  83
  84                         case "--nodeps":
  85                                 autodeps = false;
  86                                 break;
  87
  88                         case "--deps":
  89                                 autodeps = true;
  90                                 break;
  91
  92                         case "--keeptemp":
  93                                 keeptemp = true;
  94                                 break;
  95                         case "--static":
  96                                 static_link = true;
  97                                 Console.WriteLine ("Note that statically linking the LGPL Mono runtime has more licensing restrictions than dynamically linking.");
  98                                 Console.WriteLine ("See http://www.mono-project.com/Licensing for details on licensing.");
  99                                 break;
 100                         case "--config":
 101                                 if (i+1 == top) {
 102                                         Help ();
 103                                         return 1;
 104                                 }
 105
 106                                 config_file = args [++i];
 107                                 break;
 108                         case "--machine-config":
 109                                 if (i+1 == top) {
 110                                         Help ();
 111                                         return 1;
 112                                 }
 113
 114                                 machine_config_file = args [++i];
 115
 116                                 Console.WriteLine ("WARNING:\n  Check that the machine.config file you are bundling\n  doesn't contain sensitive information specific to this machine.");
 117                                 break;
 118                         case "--config-dir":
 119                                 if (i+1 == top) {
 120                                         Help ();
 121                                         return 1;
 122                                 }
 123
 124                                 config_dir = args [++i];
 125                                 break;
 126                         case "-z":
 127                                 compress = true;
 128                                 break;
 129                         case "--nomain":
 130                                 nomain = true;
 131                                 break;
 132                         case "--style":
 133                                 if (i+1 == top) {
 134                                         Help ();
 135                                         return 1;
 136                                 }
 137                                 style = args [++i];
 138                                 switch (style) {
 139                                 case "windows":
 140                                 case "mac":
 141                                 case "linux":
 142                                         break;
 143                                 default:
 144                                         Console.Error.WriteLine ("Invalid style '{0}' - only 'windows', 'mac' and 'linux' are supported for --style argument", style);
 145                                         return 1;
 146                                 }
 147
 148                                 break;
 149                         case "--skip-scan":
 150                                 skip_scan = true;
 151                                 break;
 152                         case "--static-ctor":
 153                                 if (i+1 == top) {
 154                                         Help ();
 155                                         return 1;
 156                                 }
 157                                 ctor_func = args [++i];
 158                                 break;
 159                         case "--dos2unix":
 160                         case "--dos2unix=true":
 161                                 use_dos2unix = true;
 162                                 break;
 163                         case "--dos2unix=false":
 164                                 use_dos2unix = false;
 165                                 break;
 166                         default:
 167                                 sources.Add (args [i]);
 168                                 break;
 169                         }
 170
 171                 }
 172
 173                 Console.WriteLine ("Sources: {0} Auto-dependencies: {1}", sources.Count, autodeps);
 174                 if (sources.Count == 0 || output == null) {
 175                         Help ();
 176                         Environment.Exit (1);
 177                 }
 178
 179                 List<string> assemblies = LoadAssemblies (sources);
 180                 List<string> files = new List<string> ();
 181                 foreach (string file in assemblies)
 182                         if (!QueueAssembly (files, file))
 183                                 return 1;
 184
 185                 GenerateBundles (files);
 186                 //GenerateJitWrapper ();
 187
 188                 return 0;
 189         }
 190
 191         static void WriteSymbol (StreamWriter sw, string name, long size)
 192         {
 193                 switch (style){
 194                 case "linux":
 195                         sw.WriteLine (
 196                                 ".globl {0}\n" +
 197                                 "\t.section .rodata\n" +
 198                                 "\t.p2align 5\n" +
 199                                 "\t.type {0}, \"object\"\n" +
 200                                 "\t.size {0}, {1}\n" +
 201                                 "{0}:\n",
 202                                 name, size);
 203                         break;
 204                 case "osx":
 205                         sw.WriteLine (
 206                                 "\t.section __TEXT,__text,regular,pure_instructions\n" +
 207                                 "\t.globl _{0}\n" +
 208                                 "\t.data\n" +
 209                                 "\t.align 4\n" +
 210                                 "_{0}:\n",
 211                                 name, size);
 212                         break;
 213                 case "windows":
 214                         sw.WriteLine (
 215                                 ".globl _{0}\n" +
 216                                 "\t.section .rdata,\"dr\"\n" +
 217                                 "\t.align 32\n" +
 218                                 "_{0}:\n",
 219                                 name, size);
 220                         break;
 221                 }
 222         }
 223
 224         static string [] chars = new string [256];
 225
 226         static void WriteBuffer (StreamWriter ts, Stream stream, byte[] buffer)
 227         {
 228                 int n;
 229
 230                 // Preallocate the strings we need.
 231                 if (chars [0] == null) {
 232                         for (int i = 0; i < chars.Length; i++)
 233                                 chars [i] = string.Format ("{0}", i.ToString ());
 234                 }
 235
 236                 while ((n = stream.Read (buffer, 0, buffer.Length)) != 0) {
 237                         int count = 0;
 238                         for (int i = 0; i < n; i++) {
 239                                 if (count % 32 == 0) {
 240                                         ts.Write ("\n\t.byte ");
 241                                 } else {
 242                                         ts.Write (",");
 243                                 }
 244                                 ts.Write (chars [buffer [i]]);
 245                                 count ++;
 246                         }
 247                 }
 248
 249                 ts.WriteLine ();
 250         }
 251
 252         static void GenerateBundles (List<string> files)
 253         {
 254                 string temp_s = "temp.s"; // Path.GetTempFileName ();
 255                 string temp_c = "temp.c";
 256                 string temp_o = "temp.o";
 257
 258                 if (compile_only)
 259                         temp_c = output;
 260                 if (object_out != null)
 261                         temp_o = object_out;
 262
 263                 try {
 264                         List<string> c_bundle_names = new List<string> ();
 265                         List<string[]> config_names = new List<string[]> ();
 266
 267                         using (StreamWriter ts = new StreamWriter (File.Create (temp_s))) {
 268                         using (StreamWriter tc = new StreamWriter (File.Create (temp_c))) {
 269                         string prog = null;
 270
 271 #if XAMARIN_ANDROID
 272                         tc.WriteLine ("/* This source code was produced by mkbundle, do not edit */");
 273                         tc.WriteLine ("\n#ifndef NULL\n#define NULL (void *)0\n#endif");
 274                         tc.WriteLine (@"
 275 typedef struct {
 276         const char *name;
 277         const unsigned char *data;
 278         const unsigned int size;
 279 } MonoBundledAssembly;
 280 void          mono_register_bundled_assemblies (const MonoBundledAssembly **assemblies);
 281 void          mono_register_config_for_assembly (const char* assembly_name, const char* config_xml);
 282 ");
 283 #else
 284                         tc.WriteLine ("#include <mono/metadata/mono-config.h>");
 285                         tc.WriteLine ("#include <mono/metadata/assembly.h>\n");
 286 #endif
 287
 288                         if (compress) {
 289                                 tc.WriteLine ("typedef struct _compressed_data {");
 290                                 tc.WriteLine ("\tMonoBundledAssembly assembly;");
 291                                 tc.WriteLine ("\tint compressed_size;");
 292                                 tc.WriteLine ("} CompressedAssembly;\n");
 293                         }
 294
 295                         object monitor = new object ();
 296
 297                         var streams = new Dictionary<string, Stream> ();
 298                         var sizes = new Dictionary<string, long> ();
 299
 300                         // Do the file reading and compression in parallel
 301                         Action<string> body = delegate (string url) {
 302                                 string fname = new Uri (url).LocalPath;
 303                                 Stream stream = File.OpenRead (fname);
 304
 305                                 long real_size = stream.Length;
 306                                 int n;
 307                                 if (compress) {
 308                                         byte[] cbuffer = new byte [8192];
 309                                         MemoryStream ms = new MemoryStream ();
 310                                         GZipStream deflate = new GZipStream (ms, CompressionMode.Compress, leaveOpen:true);
 311                                         while ((n = stream.Read (cbuffer, 0, cbuffer.Length)) != 0){
 312                                                 deflate.Write (cbuffer, 0, n);
 313                                         }
 314                                         stream.Close ();
 315                                         deflate.Close ();
 316                                         byte [] bytes = ms.GetBuffer ();
 317                                         stream = new MemoryStream (bytes, 0, (int) ms.Length, false, false);
 318                                 }
 319
 320                                 lock (monitor) {
 321                                         streams [url] = stream;
 322                                         sizes [url] = real_size;
 323                                 }
 324                         };
 325
 326                         //#if NET_4_5
 327 #if FALSE
 328                         Parallel.ForEach (files, body);
 329 #else
 330                         foreach (var url in files)
 331                                 body (url);
 332 #endif
 333
 334                         // The non-parallel part
 335                         byte [] buffer = new byte [8192];
 336                         foreach (var url in files) {
 337                                 string fname = new Uri (url).LocalPath;
 338                                 string aname = Path.GetFileName (fname);
 339                                 string encoded = aname.Replace ("-", "_").Replace (".", "_");
 340
 341                                 if (prog == null)
 342                                         prog = aname;
 343
 344                                 var stream = streams [url];
 345                                 var real_size = sizes [url];
 346
 347                                 Console.WriteLine ("   embedding: " + fname);
 348
 349                                 WriteSymbol (ts, "assembly_data_" + encoded, stream.Length);
 350
 351                                 WriteBuffer (ts, stream, buffer);
 352
 353                                 if (compress) {
 354                                         tc.WriteLine ("extern const unsigned char assembly_data_{0} [];", encoded);
 355                                         tc.WriteLine ("static CompressedAssembly assembly_bundle_{0} = {{{{\"{1}\"," +
 356                                                                   " assembly_data_{0}, {2}}}, {3}}};",
 357                                                                   encoded, aname, real_size, stream.Length);
 358                                         double ratio = ((double) stream.Length * 100) / real_size;
 359                                         Console.WriteLine ("   compression ratio: {0:.00}%", ratio);
 360                                 } else {
 361                                         tc.WriteLine ("extern const unsigned char assembly_data_{0} [];", encoded);
 362                                         tc.WriteLine ("static const MonoBundledAssembly assembly_bundle_{0} = {{\"{1}\", assembly_data_{0}, {2}}};",
 363                                                                   encoded, aname, real_size);
 364                                 }
 365                                 stream.Close ();
 366
 367                                 c_bundle_names.Add ("assembly_bundle_" + encoded);
 368
 369                                 try {
 370                                         FileStream cf = File.OpenRead (fname + ".config");
 371                                         Console.WriteLine (" config from: " + fname + ".config");
 372                                         tc.WriteLine ("extern const unsigned char assembly_config_{0} [];", encoded);
 373                                         WriteSymbol (ts, "assembly_config_" + encoded, cf.Length);
 374                                         WriteBuffer (ts, cf, buffer);
 375                                         ts.WriteLine ();
 376                                         config_names.Add (new string[] {aname, encoded});
 377                                 } catch (FileNotFoundException) {
 378                                         /* we ignore if the config file doesn't exist */
 379                                 }
 380                         }
 381
 382                         if (config_file != null){
 383                                 FileStream conf;
 384                                 try {
 385                                         conf = File.OpenRead (config_file);
 386                                 } catch {
 387                                         Error (String.Format ("Failure to open {0}", config_file));
 388                                         return;
 389                                 }
 390                                 Console.WriteLine ("System config from: " + config_file);
 391                                 tc.WriteLine ("extern const char system_config;");
 392                                 WriteSymbol (ts, "system_config", config_file.Length);
 393
 394                                 WriteBuffer (ts, conf, buffer);
 395                                 // null terminator
 396                                 ts.Write ("\t.byte 0\n");
 397                                 ts.WriteLine ();
 398                         }
 399
 400                         if (machine_config_file != null){
 401                                 FileStream conf;
 402                                 try {
 403                                         conf = File.OpenRead (machine_config_file);
 404                                 } catch {
 405                                         Error (String.Format ("Failure to open {0}", machine_config_file));
 406                                         return;
 407                                 }
 408                                 Console.WriteLine ("Machine config from: " + machine_config_file);
 409                                 tc.WriteLine ("extern const char machine_config;");
 410                                 WriteSymbol (ts, "machine_config", machine_config_file.Length);
 411
 412                                 WriteBuffer (ts, conf, buffer);
 413                                 ts.Write ("\t.byte 0\n");
 414                                 ts.WriteLine ();
 415                         }
 416                         ts.Close ();
 417
 418                         if (compress)
 419                                 tc.WriteLine ("\nstatic const CompressedAssembly *compressed [] = {");
 420                         else
 421                                 tc.WriteLine ("\nstatic const MonoBundledAssembly *bundled [] = {");
 422
 423                         foreach (string c in c_bundle_names){
 424                                 tc.WriteLine ("\t&{0},", c);
 425                         }
 426                         tc.WriteLine ("\tNULL\n};\n");
 427                         tc.WriteLine ("static char *image_name = \"{0}\";", prog);
 428
 429                         if (ctor_func != null) {
 430                                 tc.WriteLine ("\nextern void {0} (void);", ctor_func);
 431                                 tc.WriteLine ("\n__attribute__ ((constructor)) static void mono_mkbundle_ctor (void)");
 432                                 tc.WriteLine ("{{\n\t{0} ();\n}}", ctor_func);
 433                         }
 434
 435                         tc.WriteLine ("\nstatic void install_dll_config_files (void) {\n");
 436                         foreach (string[] ass in config_names){
 437                                 tc.WriteLine ("\tmono_register_config_for_assembly (\"{0}\", assembly_config_{1});\n", ass [0], ass [1]);
 438                         }
 439                         if (config_file != null)
 440                                 tc.WriteLine ("\tmono_config_parse_memory (&system_config);\n");
 441                         if (machine_config_file != null)
 442                                 tc.WriteLine ("\tmono_register_machine_config (&machine_config);\n");
 443                         tc.WriteLine ("}\n");
 444
 445                         if (config_dir != null)
 446                                 tc.WriteLine ("static const char *config_dir = \"{0}\";", config_dir);
 447                         else
 448                                 tc.WriteLine ("static const char *config_dir = NULL;");
 449
 450                         Stream template_stream;
 451                         if (compress) {
 452                                 template_stream = System.Reflection.Assembly.GetAssembly (typeof(MakeBundle)).GetManifestResourceStream ("template_z.c");
 453                         } else {
 454                                 template_stream = System.Reflection.Assembly.GetAssembly (typeof(MakeBundle)).GetManifestResourceStream ("template.c");
 455                         }
 456
 457                         StreamReader s = new StreamReader (template_stream);
 458                         string template = s.ReadToEnd ();
 459                         tc.Write (template);
 460
 461                         if (!nomain) {
 462                                 Stream template_main_stream = System.Reflection.Assembly.GetAssembly (typeof(MakeBundle)).GetManifestResourceStream ("template_main.c");
 463                                 StreamReader st = new StreamReader (template_main_stream);
 464                                 string maintemplate = st.ReadToEnd ();
 465                                 tc.Write (maintemplate);
 466                         }
 467
 468                         tc.Close ();
 469
 470                         string assembler = GetEnv("AS", "as");
 471                         string as_cmd = String.Format("{0} -o {1} {2} ", assembler, temp_o, temp_s);
 472                         Execute(as_cmd);
 473
 474                         if (compile_only)
 475                                 return;
 476                         Console.WriteLine("Compiling:");
 477
 478                         if (style == "windows")
 479                         {
 480
 481                                 Func<string, string> quote = (pp) => { return "\"" + pp + "\""; };
 482
 483                                 string compiler = GetEnv("CC", "cl.exe");
 484                                 string winsdkPath = GetEnv("WINSDK", @"C:\Program Files (x86)\Windows Kits\8.1");
 485                                 string vsPath = GetEnv("VSINCLUDE", @"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC");
 486                                 string monoPath = GetEnv("MONOPREFIX", @"C:\Program Files (x86)\Mono");
 487
 488                                 string[] includes = new string[] {winsdkPath + @"\Include\um", winsdkPath + @"\Include\shared", vsPath + @"\include", monoPath + @"\include\mono-2.0"};
 489                                 string[] libs = new string[] { winsdkPath + @"\Lib\winv6.3\um\x86" , vsPath + @"\lib" };
 490                                 string monoFile;
 491
 492                                 var compilerArgs = new List<string>();
 493                                 foreach (string include in includes)
 494                                         compilerArgs.Add(String.Format ("/I {0}", quote (include)));
 495
 496                                 if (static_link) {
 497                                         compilerArgs.Add("/MT");
 498                                         monoFile = monoPath + @"\lib\mono-2.0.lib";
 499                                 }
 500                                 else {
 501                                         compilerArgs.Add("/MD");
 502                                         monoFile = monoPath + @"\lib\mono-2.0.dll";
 503                                 }
 504
 505                                 compilerArgs.Add(temp_c);
 506                                 compilerArgs.Add(temp_o);
 507                                 compilerArgs.Add("/link");
 508
 509                                 foreach (string lib in libs)
 510                                         compilerArgs.Add(String.Format ("/LIBPATH:{0}", quote(lib)));
 511                                 compilerArgs.Add (quote(monoFile));
 512
 513                                 string cl_cmd = String.Format("{0} {1}", compiler, String.Join(" ", compilerArgs.ToArray()));
 514                                 Execute (cl_cmd);
 515                         }
 516                         else
 517                         {
 518                                 string zlib = (compress ? "-lz" : "");
 519                                 string debugging = "-g";
 520                                 string cc = GetEnv("CC", "cc");
 521                                 string cmd = null;
 522
 523                                 if (style == "linux")
 524                                         debugging = "-ggdb";
 525                                 if (static_link)
 526                                 {
 527                                         string smonolib;
 528                                         if (style == "osx")
 529                                                 smonolib = "`pkg-config --variable=libdir mono-2`/libmono-2.0.a ";
 530                                         else
 531                                                 smonolib = "-Wl,-Bstatic -lmono-2.0 -Wl,-Bdynamic ";
 532                                         cmd = String.Format("{4} -o {2} -Wall `pkg-config --cflags mono-2` {0} {3} " +
 533                                                 "`pkg-config --libs-only-L mono-2` " + smonolib +
 534                                                 "`pkg-config --libs-only-l mono-2 | sed -e \"s/\\-lmono-2.0 //\"` {1}",
 535                                                 temp_c, temp_o, output, zlib, cc);
 536                                 }
 537                                 else
 538                                 {
 539
 540                                         cmd = String.Format("{4} " + debugging + " -o {2} -Wall {0} `pkg-config --cflags --libs mono-2` {3} {1}",
 541                                                 temp_c, temp_o, output, zlib, cc);
 542                                 }
 543                                 Execute (cmd);
 544                         }
 545
 546                         Console.WriteLine ("Done");
 547                 }
 548         }
 549                 } finally {
 550                         if (!keeptemp){
 551                                 if (object_out == null){
 552                                         File.Delete (temp_o);
 553                                 }
 554                                 if (!compile_only){
 555                                         File.Delete (temp_c);
 556                                 }
 557                                 File.Delete (temp_s);
 558                         }
 559                 }
 560         }
 561
 562         static List<string> LoadAssemblies (List<string> sources)
 563         {
 564                 List<string> assemblies = new List<string> ();
 565                 bool error = false;
 566
 567                 foreach (string name in sources){
 568                         try {
 569                                 Assembly a = LoadAssembly (name);
 570
 571                                 if (a == null){
 572                                         error = true;
 573                                         continue;
 574                                 }
 575
 576                                 assemblies.Add (a.CodeBase);
 577                         } catch (Exception e) {
 578                                 if (skip_scan) {
 579                                         Console.WriteLine ("File will not be scanned: {0}", name);
 580                                         assemblies.Add (new Uri (new FileInfo (name).FullName).ToString ());
 581                                 } else {
 582                                         throw;
 583                                 }
 584                         }
 585                 }
 586
 587                 if (error)
 588                         Environment.Exit (1);
 589
 590                 return assemblies;
 591         }
 592
 593         static readonly Universe universe = new Universe ();
 594         static readonly Dictionary<string, string> loaded_assemblies = new Dictionary<string, string> ();
 595
 596         static bool QueueAssembly (List<string> files, string codebase)
 597         {
 598                 // Console.WriteLine ("CODE BASE IS {0}", codebase);
 599                 if (files.Contains (codebase))
 600                         return true;
 601
 602                 var path = new Uri(codebase).LocalPath;
 603                 var name = Path.GetFileName (path);
 604                 string found;
 605                 if (loaded_assemblies.TryGetValue (name, out found)) {
 606                         Error (string.Format ("Duplicate assembly name `{0}'. Both `{1}' and `{2}' use same assembly name.", name, path, found));
 607                         return false;
 608                 }
 609
 610                 loaded_assemblies.Add (name, path);
 611
 612                 files.Add (codebase);
 613                 if (!autodeps)
 614                         return true;
 615                 try {
 616                         Assembly a = universe.LoadFile (path);
 617
 618                         foreach (AssemblyName an in a.GetReferencedAssemblies ()) {
 619                                 a = universe.Load (an.FullName);
 620                                 if (!QueueAssembly (files, a.CodeBase))
 621                                         return false;
 622                         }
 623                 } catch (Exception e) {
 624                         if (!skip_scan)
 625                                 throw;
 626                 }
 627
 628                 return true;
 629         }
 630
 631         static Assembly LoadAssembly (string assembly)
 632         {
 633                 Assembly a;
 634
 635                 try {
 636                         char[] path_chars = { '/', '\\' };
 637
 638                         if (assembly.IndexOfAny (path_chars) != -1) {
 639                                 a = universe.LoadFile (assembly);
 640                         } else {
 641                                 string ass = assembly;
 642                                 if (ass.EndsWith (".dll"))
 643                                         ass = assembly.Substring (0, assembly.Length - 4);
 644                                 a = universe.Load (ass);
 645                         }
 646                         return a;
 647                 } catch (FileNotFoundException){
 648                         string total_log = "";
 649
 650                         foreach (string dir in link_paths){
 651                                 string full_path = Path.Combine (dir, assembly);
 652                                 if (!assembly.EndsWith (".dll") && !assembly.EndsWith (".exe"))
 653                                         full_path += ".dll";
 654
 655                                 try {
 656                                         a = universe.LoadFile (full_path);
 657                                         return a;
 658                                 } catch (FileNotFoundException ff) {
 659                                         total_log += ff.FusionLog;
 660                                         continue;
 661                                 }
 662                         }
 663                         Error ("Cannot find assembly `" + assembly + "'" );
 664                         Console.WriteLine ("Log: \n" + total_log);
 665                 } catch (IKVM.Reflection.BadImageFormatException f) {
 666                         if (skip_scan)
 667                                 throw;
 668                         Error ("Cannot load assembly (bad file format) " + f.Message);
 669                 } catch (FileLoadException f){
 670                         Error ("Cannot load assembly " + f.Message);
 671                 } catch (ArgumentNullException){
 672                         Error("Cannot load assembly (null argument)");
 673                 }
 674                 return null;
 675         }
 676
 677         static void Error (string msg)
 678         {
 679                 Console.Error.WriteLine ("ERROR: " + msg);
 680                 Environment.Exit (1);
 681         }
 682
 683         static void Help ()
 684         {
 685                 Console.WriteLine ("Usage is: mkbundle [options] assembly1 [assembly2...]\n\n" +
 686                                    "Options:\n" +
 687                                    "    -c                  Produce stub only, do not compile\n" +
 688                                    "    -o out              Specifies output filename\n" +
 689                                    "    -oo obj             Specifies output filename for helper object file\n" +
 690                                    "    -L path             Adds `path' to the search path for assemblies\n" +
 691                                    "    --nodeps            Turns off automatic dependency embedding (default)\n" +
 692                                    "    --deps              Turns on automatic dependency embedding\n" +
 693                                    "    --dos2unix[=true|false]\n" +
 694                                    "                        When no value provided, or when `true` specified\n" +
 695                                    "                        `dos2unix` will be invoked to convert paths on Windows.\n" +
 696                                    "                        When `--dos2unix=false` used, dos2unix is NEVER used.\n" +
 697                                    "    --keeptemp          Keeps the temporary files\n" +
 698                                    "    --config F          Bundle system config file `F'\n" +
 699                                    "    --config-dir D      Set MONO_CFG_DIR to `D'\n" +
 700                                    "    --machine-config F  Use the given file as the machine.config for the application.\n" +
 701                                    "    --static            Statically link to mono libs\n" +
 702                                    "    --nomain            Don't include a main() function, for libraries\n" +
 703                                    "    -z                  Compress the assemblies before embedding.\n" +
 704                                    "    --skip-scan         Skip scanning assemblies that could not be loaded (but still embed them).\n" +
 705                                    "    --static-ctor ctor  Add a constructor call to the supplied function.\n" +
 706                                    "                        You need zlib development headers and libraries.\n");
 707         }
 708
 709         [DllImport ("libc")]
 710         static extern int system (string s);
 711         [DllImport ("libc")]
 712         static extern int uname (IntPtr buf);
 713
 714         static void DetectOS ()
 715         {
 716                 if (!IsUnix) {
 717                         Console.WriteLine ("OS is: Windows");
 718                         style = "windows";
 719                         return;
 720                 }
 721
 722                 IntPtr buf = Marshal.AllocHGlobal (8192);
 723                 if (uname (buf) != 0){
 724                         Console.WriteLine ("Warning: Unable to detect OS");
 725                         Marshal.FreeHGlobal (buf);
 726                         return;
 727                 }
 728                 string os = Marshal.PtrToStringAnsi (buf);
 729                 Console.WriteLine ("OS is: " + os);
 730                 if (os == "Darwin")
 731                         style = "osx";
 732
 733                 Marshal.FreeHGlobal (buf);
 734         }
 735
 736         static bool IsUnix {
 737                 get {
 738                         int p = (int) Environment.OSVersion.Platform;
 739                         return ((p == 4) || (p == 128) || (p == 6));
 740                 }
 741         }
 742
 743         static void Execute (string cmdLine)
 744         {
 745                 if (IsUnix) {
 746                         Console.WriteLine ("[execute cmd]: " + cmdLine);
 747                         int ret = system (cmdLine);
 748                         if (ret != 0)
 749                         {
 750                                 Error(String.Format("[Fail] {0}", ret));
 751                         }
 752                         return;
 753                 }
 754
 755                 // on Windows, we have to pipe the output of a
 756                 // `cmd` interpolation to dos2unix, because the shell does not
 757                 // strip the CRLFs generated by the native pkg-config distributed
 758                 // with Mono.
 759                 //
 760                 // But if it's *not* on cygwin, just skip it.
 761
 762                 // check if dos2unix is applicable.
 763                 if (use_dos2unix == true)
 764                         try {
 765                         var info = new ProcessStartInfo ("dos2unix");
 766                         info.CreateNoWindow = true;
 767                         info.RedirectStandardInput = true;
 768                         info.UseShellExecute = false;
 769                         var dos2unix = Process.Start (info);
 770                         dos2unix.StandardInput.WriteLine ("aaa");
 771                         dos2unix.StandardInput.WriteLine ("\u0004");
 772                         dos2unix.StandardInput.Close ();
 773                         dos2unix.WaitForExit ();
 774                         if (dos2unix.ExitCode == 0)
 775                                 use_dos2unix = true;
 776                 } catch {
 777                         Console.WriteLine("Warning: dos2unix not found");
 778                         use_dos2unix = false;
 779                 }
 780
 781                 if (use_dos2unix == null)
 782                         use_dos2unix = false;
 783
 784                 ProcessStartInfo psi = new ProcessStartInfo();
 785                 psi.UseShellExecute = false;
 786
 787                 // if there is no dos2unix, just run cmd /c.
 788                 if (use_dos2unix == false)
 789                 {
 790                         psi.FileName = "cmd";
 791                         psi.Arguments = String.Format("/c \"{0}\"", cmdLine);
 792                 }
 793                 else
 794                 {
 795                         psi.FileName = "sh";
 796                         StringBuilder b = new StringBuilder();
 797                         int count = 0;
 798                         for (int i = 0; i < cmdLine.Length; i++)
 799                         {
 800                                 if (cmdLine[i] == '`')
 801                                 {
 802                                         if (count % 2 != 0)
 803                                         {
 804                                                 b.Append("|dos2unix");
 805                                         }
 806                                         count++;
 807                                 }
 808                                 b.Append(cmdLine[i]);
 809                         }
 810                         cmdLine = b.ToString();
 811                         psi.Arguments = String.Format("-c \"{0}\"", cmdLine);
 812                 }
 813
 814                 Console.WriteLine(cmdLine);
 815                 using (Process p = Process.Start (psi)) {
 816                         p.WaitForExit ();
 817                         int ret = p.ExitCode;
 818                         if (ret != 0){
 819                                 Error (String.Format("[Fail] {0}", ret));
 820                         }
 821                 }
 822         }
 823
 824         static string GetEnv(string name, string defaultValue)
 825         {
 826                 string val = Environment.GetEnvironmentVariable(name);
 827                 if (val != null)
 828                 {
 829                         Console.WriteLine("{0} = {1}", name, val);
 830                 }
 831                 else
 832                 {
 833                         val = defaultValue;
 834                         Console.WriteLine("{0} = {1} (default)", name, val);
 835                 }
 836                 return val;
 837         }
 838 }