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 #if NET_4_5
  23 using System.Threading.Tasks;
  24 #endif
  25
  26 class MakeBundle {
  27         static string output = "a.out";
  28         static string object_out = null;
  29         static List<string> link_paths = new List<string> ();
  30         static bool autodeps = false;
  31         static bool keeptemp = false;
  32         static bool compile_only = false;
  33         static bool static_link = false;
  34         static string config_file = null;
  35         static string machine_config_file = null;
  36         static string config_dir = null;
  37         static string style = "linux";
  38         static bool compress;
  39         static bool nomain;
  40         static bool? use_dos2unix = null;
  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                         default:
 150                                 sources.Add (args [i]);
 151                                 break;
 152                         }
 153
 154                         if (static_link && style == "windows") {
 155                                 Console.Error.WriteLine ("The option `{0}' is not supported on this platform.", args [i]);
 156                                 return 1;
 157                         }
 158                 }
 159
 160                 Console.WriteLine ("Sources: {0} Auto-dependencies: {1}", sources.Count, autodeps);
 161                 if (sources.Count == 0 || output == null) {
 162                         Help ();
 163                         Environment.Exit (1);
 164                 }
 165
 166                 List<Assembly> assemblies = LoadAssemblies (sources);
 167                 List<string> files = new List<string> ();
 168                 foreach (Assembly a in assemblies)
 169                         QueueAssembly (files, a.CodeBase);
 170
 171                 // Special casing mscorlib.dll: any specified mscorlib.dll cannot be loaded
 172                 // by Assembly.ReflectionFromLoadFrom(). Instead the fx assembly which runs
 173                 // mkbundle.exe is loaded, which is not what we want.
 174                 // So, replace it with whatever actually specified.
 175                 foreach (string srcfile in sources) {
 176                         if (Path.GetFileName (srcfile) == "mscorlib.dll") {
 177                                 foreach (string file in files) {
 178                                         if (Path.GetFileName (new Uri (file).LocalPath) == "mscorlib.dll") {
 179                                                 files.Remove (file);
 180                                                 files.Add (new Uri (Path.GetFullPath (srcfile)).LocalPath);
 181                                                 break;
 182                                         }
 183                                 }
 184                                 break;
 185                         }
 186                 }
 187
 188                 GenerateBundles (files);
 189                 //GenerateJitWrapper ();
 190
 191                 return 0;
 192         }
 193
 194         static void WriteSymbol (StreamWriter sw, string name, long size)
 195         {
 196                 switch (style){
 197                 case "linux":
 198                         sw.WriteLine (
 199                                 ".globl {0}\n" +
 200                                 "\t.section .rodata\n" +
 201                                 "\t.p2align 5\n" +
 202                                 "\t.type {0}, \"object\"\n" +
 203                                 "\t.size {0}, {1}\n" +
 204                                 "{0}:\n",
 205                                 name, size);
 206                         break;
 207                 case "osx":
 208                         sw.WriteLine (
 209                                 "\t.section __TEXT,__text,regular,pure_instructions\n" +
 210                                 "\t.globl _{0}\n" +
 211                                 "\t.data\n" +
 212                                 "\t.align 4\n" +
 213                                 "_{0}:\n",
 214                                 name, size);
 215                         break;
 216                 case "windows":
 217                         sw.WriteLine (
 218                                 ".globl _{0}\n" +
 219                                 "\t.section .rdata,\"dr\"\n" +
 220                                 "\t.align 32\n" +
 221                                 "_{0}:\n",
 222                                 name, size);
 223                         break;
 224                 }
 225         }
 226
 227         static string [] chars = new string [256];
 228
 229         static void WriteBuffer (StreamWriter ts, Stream stream, byte[] buffer)
 230         {
 231                 int n;
 232
 233                 // Preallocate the strings we need.
 234                 if (chars [0] == null) {
 235                         for (int i = 0; i < chars.Length; i++)
 236                                 chars [i] = string.Format ("{0}", i.ToString ());
 237                 }
 238
 239                 while ((n = stream.Read (buffer, 0, buffer.Length)) != 0) {
 240                         int count = 0;
 241                         for (int i = 0; i < n; i++) {
 242                                 if (count % 32 == 0) {
 243                                         ts.Write ("\n\t.byte ");
 244                                 } else {
 245                                         ts.Write (",");
 246                                 }
 247                                 ts.Write (chars [buffer [i]]);
 248                                 count ++;
 249                         }
 250                 }
 251
 252                 ts.WriteLine ();
 253         }
 254
 255         static void GenerateBundles (List<string> files)
 256         {
 257                 string temp_s = "temp.s"; // Path.GetTempFileName ();
 258                 string temp_c = "temp.c";
 259                 string temp_o = "temp.o";
 260
 261                 if (compile_only)
 262                         temp_c = output;
 263                 if (object_out != null)
 264                         temp_o = object_out;
 265
 266                 try {
 267                         List<string> c_bundle_names = new List<string> ();
 268                         List<string[]> config_names = new List<string[]> ();
 269
 270                         using (StreamWriter ts = new StreamWriter (File.Create (temp_s))) {
 271                         using (StreamWriter tc = new StreamWriter (File.Create (temp_c))) {
 272                         string prog = null;
 273
 274 #if XAMARIN_ANDROID
 275                         tc.WriteLine ("/* This source code was produced by mkbundle, do not edit */");
 276                         tc.WriteLine ("\n#ifndef NULL\n#define NULL (void *)0\n#endif");
 277                         tc.WriteLine (@"
 278 typedef struct {
 279         const char *name;
 280         const unsigned char *data;
 281         const unsigned int size;
 282 } MonoBundledAssembly;
 283 void          mono_register_bundled_assemblies (const MonoBundledAssembly **assemblies);
 284 void          mono_register_config_for_assembly (const char* assembly_name, const char* config_xml);
 285 ");
 286 #else
 287                         tc.WriteLine ("#include <mono/metadata/mono-config.h>");
 288                         tc.WriteLine ("#include <mono/metadata/assembly.h>\n");
 289 #endif
 290
 291                         if (compress) {
 292                                 tc.WriteLine ("typedef struct _compressed_data {");
 293                                 tc.WriteLine ("\tMonoBundledAssembly assembly;");
 294                                 tc.WriteLine ("\tint compressed_size;");
 295                                 tc.WriteLine ("} CompressedAssembly;\n");
 296                         }
 297
 298                         object monitor = new object ();
 299
 300                         var streams = new Dictionary<string, Stream> ();
 301                         var sizes = new Dictionary<string, long> ();
 302
 303                         // Do the file reading and compression in parallel
 304                         Action<string> body = delegate (string url) {
 305                                 string fname = new Uri (url).LocalPath;
 306                                 Stream stream = File.OpenRead (fname);
 307
 308                                 long real_size = stream.Length;
 309                                 int n;
 310                                 if (compress) {
 311                                         byte[] cbuffer = new byte [8192];
 312                                         MemoryStream ms = new MemoryStream ();
 313                                         GZipStream deflate = new GZipStream (ms, CompressionMode.Compress, leaveOpen:true);
 314                                         while ((n = stream.Read (cbuffer, 0, cbuffer.Length)) != 0){
 315                                                 deflate.Write (cbuffer, 0, n);
 316                                         }
 317                                         stream.Close ();
 318                                         deflate.Close ();
 319                                         byte [] bytes = ms.GetBuffer ();
 320                                         stream = new MemoryStream (bytes, 0, (int) ms.Length, false, false);
 321                                 }
 322
 323                                 lock (monitor) {
 324                                         streams [url] = stream;
 325                                         sizes [url] = real_size;
 326                                 }
 327                         };
 328
 329                         //#if NET_4_5
 330 #if FALSE
 331                         Parallel.ForEach (files, body);
 332 #else
 333                         foreach (var url in files)
 334                                 body (url);
 335 #endif
 336
 337                         // The non-parallel part
 338                         byte [] buffer = new byte [8192];
 339                         foreach (var url in files) {
 340                                 string fname = new Uri (url).LocalPath;
 341                                 string aname = Path.GetFileName (fname);
 342                                 string encoded = aname.Replace ("-", "_").Replace (".", "_");
 343
 344                                 if (prog == null)
 345                                         prog = aname;
 346
 347                                 var stream = streams [url];
 348                                 var real_size = sizes [url];
 349
 350                                 Console.WriteLine ("   embedding: " + fname);
 351
 352                                 WriteSymbol (ts, "assembly_data_" + encoded, stream.Length);
 353
 354                                 WriteBuffer (ts, stream, buffer);
 355
 356                                 if (compress) {
 357                                         tc.WriteLine ("extern const unsigned char assembly_data_{0} [];", encoded);
 358                                         tc.WriteLine ("static CompressedAssembly assembly_bundle_{0} = {{{{\"{1}\"," +
 359                                                                   " assembly_data_{0}, {2}}}, {3}}};",
 360                                                                   encoded, aname, real_size, stream.Length);
 361                                         double ratio = ((double) stream.Length * 100) / real_size;
 362                                         Console.WriteLine ("   compression ratio: {0:.00}%", ratio);
 363                                 } else {
 364                                         tc.WriteLine ("extern const unsigned char assembly_data_{0} [];", encoded);
 365                                         tc.WriteLine ("static const MonoBundledAssembly assembly_bundle_{0} = {{\"{1}\", assembly_data_{0}, {2}}};",
 366                                                                   encoded, aname, real_size);
 367                                 }
 368                                 stream.Close ();
 369
 370                                 c_bundle_names.Add ("assembly_bundle_" + encoded);
 371
 372                                 try {
 373                                         FileStream cf = File.OpenRead (fname + ".config");
 374                                         Console.WriteLine (" config from: " + fname + ".config");
 375                                         tc.WriteLine ("extern const unsigned char assembly_config_{0} [];", encoded);
 376                                         WriteSymbol (ts, "assembly_config_" + encoded, cf.Length);
 377                                         WriteBuffer (ts, cf, buffer);
 378                                         ts.WriteLine ();
 379                                         config_names.Add (new string[] {aname, encoded});
 380                                 } catch (FileNotFoundException) {
 381                                         /* we ignore if the config file doesn't exist */
 382                                 }
 383                         }
 384
 385                         if (config_file != null){
 386                                 FileStream conf;
 387                                 try {
 388                                         conf = File.OpenRead (config_file);
 389                                 } catch {
 390                                         Error (String.Format ("Failure to open {0}", config_file));
 391                                         return;
 392                                 }
 393                                 Console.WriteLine ("System config from: " + config_file);
 394                                 tc.WriteLine ("extern const char system_config;");
 395                                 WriteSymbol (ts, "system_config", config_file.Length);
 396
 397                                 WriteBuffer (ts, conf, buffer);
 398                                 // null terminator
 399                                 ts.Write ("\t.byte 0\n");
 400                                 ts.WriteLine ();
 401                         }
 402
 403                         if (machine_config_file != null){
 404                                 FileStream conf;
 405                                 try {
 406                                         conf = File.OpenRead (machine_config_file);
 407                                 } catch {
 408                                         Error (String.Format ("Failure to open {0}", machine_config_file));
 409                                         return;
 410                                 }
 411                                 Console.WriteLine ("Machine config from: " + machine_config_file);
 412                                 tc.WriteLine ("extern const char machine_config;");
 413                                 WriteSymbol (ts, "machine_config", machine_config_file.Length);
 414
 415                                 WriteBuffer (ts, conf, buffer);
 416                                 ts.Write ("\t.byte 0\n");
 417                                 ts.WriteLine ();
 418                         }
 419                         ts.Close ();
 420
 421                         Console.WriteLine ("Compiling:");
 422                         string cmd = String.Format ("{0} -o {1} {2} ", GetEnv ("AS", "as"), temp_o, temp_s);
 423                         int ret = Execute (cmd);
 424                         if (ret != 0){
 425                                 Error ("[Fail]");
 426                                 return;
 427                         }
 428
 429                         if (compress)
 430                                 tc.WriteLine ("\nstatic const CompressedAssembly *compressed [] = {");
 431                         else
 432                                 tc.WriteLine ("\nstatic const MonoBundledAssembly *bundled [] = {");
 433
 434                         foreach (string c in c_bundle_names){
 435                                 tc.WriteLine ("\t&{0},", c);
 436                         }
 437                         tc.WriteLine ("\tNULL\n};\n");
 438                         tc.WriteLine ("static char *image_name = \"{0}\";", prog);
 439
 440                         tc.WriteLine ("\nstatic void install_dll_config_files (void) {\n");
 441                         foreach (string[] ass in config_names){
 442                                 tc.WriteLine ("\tmono_register_config_for_assembly (\"{0}\", assembly_config_{1});\n", ass [0], ass [1]);
 443                         }
 444                         if (config_file != null)
 445                                 tc.WriteLine ("\tmono_config_parse_memory (&system_config);\n");
 446                         if (machine_config_file != null)
 447                                 tc.WriteLine ("\tmono_register_machine_config (&machine_config);\n");
 448                         tc.WriteLine ("}\n");
 449
 450                         if (config_dir != null)
 451                                 tc.WriteLine ("static const char *config_dir = \"{0}\";", config_dir);
 452                         else
 453                                 tc.WriteLine ("static const char *config_dir = NULL;");
 454
 455                         Stream template_stream;
 456                         if (compress) {
 457                                 template_stream = System.Reflection.Assembly.GetAssembly (typeof(MakeBundle)).GetManifestResourceStream ("template_z.c");
 458                         } else {
 459                                 template_stream = System.Reflection.Assembly.GetAssembly (typeof(MakeBundle)).GetManifestResourceStream ("template.c");
 460                         }
 461
 462                         StreamReader s = new StreamReader (template_stream);
 463                         string template = s.ReadToEnd ();
 464                         tc.Write (template);
 465
 466                         if (!nomain) {
 467                                 Stream template_main_stream = System.Reflection.Assembly.GetAssembly (typeof(MakeBundle)).GetManifestResourceStream ("template_main.c");
 468                                 StreamReader st = new StreamReader (template_main_stream);
 469                                 string maintemplate = st.ReadToEnd ();
 470                                 tc.Write (maintemplate);
 471                         }
 472
 473                         tc.Close ();
 474
 475                         if (compile_only)
 476                                 return;
 477
 478                         string zlib = (compress ? "-lz" : "");
 479                         string debugging = "-g";
 480                         string cc = GetEnv ("CC", IsUnix ? "cc" : "i686-pc-mingw32-gcc");
 481
 482                         if (style == "linux")
 483                                 debugging = "-ggdb";
 484                         if (static_link) {
 485                                 string smonolib;
 486                                 if (style == "osx")
 487                                         smonolib = "`pkg-config --variable=libdir mono-2`/libmono-2.0.a ";
 488                                 else
 489                                         smonolib = "-Wl,-Bstatic -lmono-2.0 -Wl,-Bdynamic ";
 490                                 cmd = String.Format ("{4} -o {2} -Wall `pkg-config --cflags mono-2` {0} {3} " +
 491                                                      "`pkg-config --libs-only-L mono-2` " + smonolib +
 492                                                      "`pkg-config --libs-only-l mono-2 | sed -e \"s/\\-lmono-2.0 //\"` {1}",
 493                                                      temp_c, temp_o, output, zlib, cc);
 494                         } else {
 495
 496                                 cmd = String.Format ("{4} " + debugging + " -o {2} -Wall {0} `pkg-config --cflags --libs mono-2` {3} {1}",
 497                                                      temp_c, temp_o, output, zlib, cc);
 498                         }
 499
 500                         ret = Execute (cmd);
 501                         if (ret != 0){
 502                                 Error ("[Fail]");
 503                                 return;
 504                         }
 505                         Console.WriteLine ("Done");
 506                         }
 507                         }
 508                 } finally {
 509                         if (!keeptemp){
 510                                 if (object_out == null){
 511                                         File.Delete (temp_o);
 512                                 }
 513                                 if (!compile_only){
 514                                         File.Delete (temp_c);
 515                                 }
 516                                 File.Delete (temp_s);
 517                         }
 518                 }
 519         }
 520
 521         static List<Assembly> LoadAssemblies (List<string> sources)
 522         {
 523                 List<Assembly> assemblies = new List<Assembly> ();
 524                 bool error = false;
 525
 526                 foreach (string name in sources){
 527                         Assembly a = LoadAssembly (name);
 528
 529                         if (a == null){
 530                                 error = true;
 531                                 continue;
 532                         }
 533
 534                         assemblies.Add (a);
 535                 }
 536
 537                 if (error)
 538                         Environment.Exit (1);
 539
 540                 return assemblies;
 541         }
 542
 543         static readonly Universe universe = new Universe ();
 544
 545         static void QueueAssembly (List<string> files, string codebase)
 546         {
 547                 if (files.Contains (codebase))
 548                         return;
 549
 550                 files.Add (codebase);
 551                 Assembly a = universe.LoadFile (new Uri(codebase).LocalPath);
 552
 553                 if (!autodeps)
 554                         return;
 555
 556                 foreach (AssemblyName an in a.GetReferencedAssemblies ()) {
 557                         a = universe.Load (an.Name);
 558                         QueueAssembly (files, a.CodeBase);
 559                 }
 560         }
 561
 562         static Assembly LoadAssembly (string assembly)
 563         {
 564                 Assembly a;
 565
 566                 try {
 567                         char[] path_chars = { '/', '\\' };
 568
 569                         if (assembly.IndexOfAny (path_chars) != -1) {
 570                                 a = universe.LoadFile (assembly);
 571                         } else {
 572                                 string ass = assembly;
 573                                 if (ass.EndsWith (".dll"))
 574                                         ass = assembly.Substring (0, assembly.Length - 4);
 575                                 a = universe.Load (ass);
 576                         }
 577                         return a;
 578                 } catch (FileNotFoundException){
 579                         string total_log = "";
 580
 581                         foreach (string dir in link_paths){
 582                                 string full_path = Path.Combine (dir, assembly);
 583                                 if (!assembly.EndsWith (".dll") && !assembly.EndsWith (".exe"))
 584                                         full_path += ".dll";
 585
 586                                 try {
 587                                         a = universe.LoadFile (full_path);
 588                                         return a;
 589                                 } catch (FileNotFoundException ff) {
 590                                         total_log += ff.FusionLog;
 591                                         continue;
 592                                 }
 593                         }
 594                         Error ("Cannot find assembly `" + assembly + "'" );
 595                         Console.WriteLine ("Log: \n" + total_log);
 596                 } catch (IKVM.Reflection.BadImageFormatException f) {
 597                         Error ("Cannot load assembly (bad file format) " + f.Message);
 598                 } catch (FileLoadException f){
 599                         Error ("Cannot load assembly " + f.Message);
 600                 } catch (ArgumentNullException){
 601                         Error("Cannot load assembly (null argument)");
 602                 }
 603                 return null;
 604         }
 605
 606         static void Error (string msg)
 607         {
 608                 Console.Error.WriteLine (msg);
 609                 Environment.Exit (1);
 610         }
 611
 612         static void Help ()
 613         {
 614                 Console.WriteLine ("Usage is: mkbundle [options] assembly1 [assembly2...]\n\n" +
 615                                    "Options:\n" +
 616                                    "    -c                  Produce stub only, do not compile\n" +
 617                                    "    -o out              Specifies output filename\n" +
 618                                    "    -oo obj             Specifies output filename for helper object file\n" +
 619                                    "    -L path             Adds `path' to the search path for assemblies\n" +
 620                                    "    --nodeps            Turns off automatic dependency embedding (default)\n" +
 621                                    "    --deps              Turns on automatic dependency embedding\n" +
 622                                    "    --keeptemp          Keeps the temporary files\n" +
 623                                    "    --config F          Bundle system config file `F'\n" +
 624                                    "    --config-dir D      Set MONO_CFG_DIR to `D'\n" +
 625                                    "    --machine-config F  Use the given file as the machine.config for the application.\n" +
 626                                    "    --static            Statically link to mono libs\n" +
 627                                    "    --nomain            Don't include a main() function, for libraries\n" +
 628                                    "    -z                  Compress the assemblies before embedding.\n" +
 629                                    "                        You need zlib development headers and libraries.\n");
 630         }
 631
 632         [DllImport ("libc")]
 633         static extern int system (string s);
 634         [DllImport ("libc")]
 635         static extern int uname (IntPtr buf);
 636
 637         static void DetectOS ()
 638         {
 639                 if (!IsUnix) {
 640                         Console.WriteLine ("OS is: Windows");
 641                         style = "windows";
 642                         return;
 643                 }
 644
 645                 IntPtr buf = Marshal.AllocHGlobal (8192);
 646                 if (uname (buf) != 0){
 647                         Console.WriteLine ("Warning: Unable to detect OS");
 648                         Marshal.FreeHGlobal (buf);
 649                         return;
 650                 }
 651                 string os = Marshal.PtrToStringAnsi (buf);
 652                 Console.WriteLine ("OS is: " + os);
 653                 if (os == "Darwin")
 654                         style = "osx";
 655
 656                 Marshal.FreeHGlobal (buf);
 657         }
 658
 659         static bool IsUnix {
 660                 get {
 661                         int p = (int) Environment.OSVersion.Platform;
 662                         return ((p == 4) || (p == 128) || (p == 6));
 663                 }
 664         }
 665
 666         static int Execute (string cmdLine)
 667         {
 668                 if (IsUnix) {
 669                         Console.WriteLine (cmdLine);
 670                         return system (cmdLine);
 671                 }
 672
 673                 // on Windows, we have to pipe the output of a
 674                 // `cmd` interpolation to dos2unix, because the shell does not
 675                 // strip the CRLFs generated by the native pkg-config distributed
 676                 // with Mono.
 677                 //
 678                 // But if it's *not* on cygwin, just skip it.
 679
 680                 // check if dos2unix is applicable.
 681                 if (use_dos2unix == null) {
 682                         use_dos2unix = false;
 683                         try {
 684                                 var dos2unix = Process.Start ("dos2unix");
 685                                 dos2unix.StandardInput.WriteLine ("aaa");
 686                                 dos2unix.StandardInput.WriteLine ("\u0004");
 687                                 dos2unix.WaitForExit ();
 688                                 if (dos2unix.ExitCode == 0)
 689                                         use_dos2unix = true;
 690                         } catch {
 691                                 // ignore
 692                         }
 693                 }
 694                 // and if there is no dos2unix, just run cmd /c.
 695                 if (use_dos2unix == false) {
 696                         Console.WriteLine (cmdLine);
 697                         ProcessStartInfo dos2unix = new ProcessStartInfo ();
 698                         dos2unix.UseShellExecute = false;
 699                         dos2unix.FileName = "cmd";
 700                         dos2unix.Arguments = String.Format ("/c \"{0}\"", cmdLine);
 701
 702                         using (Process p = Process.Start (dos2unix)) {
 703                                 p.WaitForExit ();
 704                                 return p.ExitCode;
 705                         }
 706                 }
 707
 708                 StringBuilder b = new StringBuilder ();
 709                 int count = 0;
 710                 for (int i = 0; i < cmdLine.Length; i++) {
 711                         if (cmdLine [i] == '`') {
 712                                 if (count % 2 != 0) {
 713                                         b.Append ("|dos2unix");
 714                                 }
 715                                 count++;
 716                         }
 717                         b.Append (cmdLine [i]);
 718                 }
 719                 cmdLine = b.ToString ();
 720                 Console.WriteLine (cmdLine);
 721
 722                 ProcessStartInfo psi = new ProcessStartInfo ();
 723                 psi.UseShellExecute = false;
 724                 psi.FileName = "sh";
 725                 psi.Arguments = String.Format ("-c \"{0}\"", cmdLine);
 726
 727                 using (Process p = Process.Start (psi)) {
 728                         p.WaitForExit ();
 729                         return p.ExitCode;
 730                 }
 731         }
 732
 733         static string GetEnv (string name, string defaultValue)
 734         {
 735                 string s = Environment.GetEnvironmentVariable (name);
 736                 return s != null ? s : defaultValue;
 737         }
 738 }