source/builder.cpp

   1 #include <set>
   2 #include <cstdlib>
   3 #include <msp/core/getopt.h>
   4 #include <msp/datafile/parser.h>
   5 #include <msp/fs/dir.h>
   6 #include <msp/fs/stat.h>
   7 #include <msp/fs/utils.h>
   8 #include <msp/io/buffered.h>
   9 #include <msp/io/file.h>
  10 #include <msp/io/print.h>
  11 #include <msp/strings/format.h>
  12 #include <msp/strings/regex.h>
  13 #include <msp/strings/utils.h>
  14 #include <msp/time/units.h>
  15 #include <msp/time/utils.h>
  16 #include "analyzer.h"
  17 #include "binarypackage.h"
  18 #include "builder.h"
  19 #include "copy.h"
  20 #include "externaltask.h"
  21 #include "gnuarchiver.h"
  22 #include "gnuccompiler.h"
  23 #include "gnucxxcompiler.h"
  24 #include "gnulinker.h"
  25 #include "installedfile.h"
  26 #include "package.h"
  27 #include "pkgconfigfile.h"
  28 #include "pkgconfiggenerator.h"
  29 #include "sharedlibrary.h"
  30 #include "sourcepackage.h"
  31 #include "tar.h"
  32 #include "task.h"
  33 #include "virtualtarget.h"
  34
  35 using namespace std;
  36 using namespace Msp;
  37
  38 Builder::Builder(int argc, char **argv):
  39         main_pkg(0),
  40         native_arch(*this, string()),
  41         vfs(*this),
  42         analyzer(0),
  43         build(false),
  44         clean(0),
  45         dry_run(false),
  46         help(false),
  47         verbose(1),
  48         show_progress(false),
  49         build_file("Build"),
  50         jobs(1),
  51         conf_all(false),
  52         conf_only(false),
  53         build_all(false),
  54         create_makefile(false)
  55 {
  56         string analyze_mode;
  57         string work_dir;
  58         bool full_paths = false;
  59         unsigned max_depth = 5;
  60         StringList cmdline_warn;
  61         string prfx;
  62         string arch;
  63
  64         GetOpt getopt;
  65         getopt.add_option('a', "analyze",    analyze_mode,  GetOpt::REQUIRED_ARG).set_help("Perform analysis.  MODE can be deps, alldeps or rebuild.", "MODE");
  66         getopt.add_option('b', "build",      build,         GetOpt::NO_ARG).set_help("Perform build even if doing analysis.");
  67         getopt.add_option('c', "clean",      clean,         GetOpt::NO_ARG).set_help("Clean buildable targets.");
  68         getopt.add_option('f', "file",       build_file,    GetOpt::REQUIRED_ARG).set_help("Read info from FILE instead of Build.", "FILE");
  69         getopt.add_option('h', "help",       help,          GetOpt::NO_ARG).set_help("Print this message.");
  70         getopt.add_option('j', "jobs",       jobs,          GetOpt::REQUIRED_ARG).set_help("Run NUM commands at once, whenever possible.", "NUM");
  71         getopt.add_option('n', "dry-run",    dry_run,       GetOpt::NO_ARG).set_help("Don't actually do anything, only show what would be done.");
  72         getopt.add_option('v', "verbose",    verbose,       GetOpt::NO_ARG).set_help("Print more information about what's going on.");
  73         getopt.add_option('x', "no-externals",  no_externals, GetOpt::NO_ARG).set_help("Do not load external source packages.");
  74         getopt.add_option('A', "conf-all",   conf_all,      GetOpt::NO_ARG).set_help("Apply configuration to all packages.");
  75         getopt.add_option('B', "build-all",  build_all,     GetOpt::NO_ARG).set_help("Build all targets unconditionally.");
  76         getopt.add_option('C', "chdir",      work_dir,      GetOpt::REQUIRED_ARG).set_help("Change to DIR before doing anything else.", "DIR");
  77         getopt.add_option('P', "progress",   show_progress, GetOpt::NO_ARG).set_help("Display progress while building.");
  78         getopt.add_option('W', "what-if",    what_if,       GetOpt::REQUIRED_ARG).set_help("Pretend that FILE has changed.", "FILE");
  79         getopt.add_option(     "arch",       arch,          GetOpt::REQUIRED_ARG).set_help("Architecture to build for.", "ARCH");
  80         getopt.add_option(     "conf-only",  conf_only,     GetOpt::NO_ARG).set_help("Stop after configuring packages.");
  81         getopt.add_option(     "full-paths", full_paths,    GetOpt::NO_ARG).set_help("Output full paths in analysis.");
  82         getopt.add_option(     "max-depth",  max_depth,     GetOpt::REQUIRED_ARG).set_help("Maximum depth to show in analysis.", "NUM");
  83         getopt.add_option(     "prefix",     prfx,          GetOpt::REQUIRED_ARG).set_help("Directory to install things to.", "DIR");
  84         getopt.add_option(     "warnings",   cmdline_warn,  GetOpt::REQUIRED_ARG).set_help("Compiler warnings to use.", "LIST");
  85         usagemsg = getopt.generate_usage(argv[0])+" [<target> ...]";
  86         helpmsg = getopt.generate_help();
  87         getopt(argc, argv);
  88
  89         if(!analyze_mode.empty())
  90         {
  91                 analyzer = new Analyzer(*this);
  92
  93                 if(analyze_mode=="deps")
  94                         analyzer->set_mode(Analyzer::DEPS);
  95                 else if(analyze_mode=="alldeps")
  96                         analyzer->set_mode(Analyzer::ALLDEPS);
  97                 else if(analyze_mode=="rebuild")
  98                         analyzer->set_mode(Analyzer::REBUILD);
  99                 else if(analyze_mode=="rdeps")
 100                         analyzer->set_mode(Analyzer::RDEPS);
 101                 else
 102                         throw usage_error("Invalid analyze mode");
 103
 104                 analyzer->set_max_depth(max_depth);
 105                 analyzer->set_full_paths(full_paths);
 106         }
 107         else if(!clean && !create_makefile)
 108                 build = true;
 109
 110         const vector<string> &args = getopt.get_args();
 111         for(vector<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
 112         {
 113                 string::size_type equal = i->find('=');
 114                 if(equal!=string::npos)
 115                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 116                 else
 117                         cmdline_targets.push_back(*i);
 118         }
 119
 120         if(cmdline_targets.empty())
 121                 cmdline_targets.push_back("default");
 122
 123         if(!work_dir.empty())
 124                 FS::chdir(work_dir);
 125
 126         cwd = FS::getcwd();
 127
 128         toolchain.add_tool(new GnuCCompiler(*this));
 129         toolchain.add_tool(new GnuCxxCompiler(*this));
 130         toolchain.add_tool(new GnuLinker(*this));
 131         toolchain.add_tool(new GnuArchiver(*this));
 132         toolchain.add_tool(new Copy(*this));
 133         toolchain.add_tool(new Tar(*this));
 134         toolchain.add_tool(new PkgConfigGenerator(*this));
 135
 136         load_build_file((FS::get_sys_data_dir(argv[0], "builder")/"builderrc").str());
 137         load_build_file((FS::get_user_data_dir("builder")/"rc").str());
 138
 139         if(arch.empty())
 140                 current_arch = &native_arch;
 141         else
 142                 current_arch = new Architecture(*this, arch);
 143
 144         if(!current_arch->is_native())
 145         {
 146                 for(StringMap::const_iterator i=cross_prefixes.begin(); i!=cross_prefixes.end(); ++i)
 147                         if(current_arch->match_name(i->first))
 148                         {
 149                                 current_arch->set_cross_prefix(i->second);
 150                                 break;
 151                         }
 152         }
 153
 154         if(prfx.empty())
 155         {
 156                 if(current_arch->is_native())
 157                         prefix = (FS::get_home_dir()/"local").str();
 158                 else
 159                         prefix = (FS::get_home_dir()/"local"/current_arch->get_name()).str();
 160         }
 161         else
 162                 prefix = FS::getcwd()/prfx;
 163
 164         warnings.push_back("all");
 165         warnings.push_back("extra");
 166         warnings.push_back("shadow");
 167         warnings.push_back("pointer-arith");
 168         warnings.push_back("error");
 169         for(StringList::iterator i=cmdline_warn.begin(); i!=cmdline_warn.end(); ++i)
 170         {
 171                 vector<string> warns = split(*i, ',');
 172                 warnings.insert(warnings.end(), warns.begin(), warns.end());
 173         }
 174
 175         pkg_path.push_back(cwd/".");
 176         pkg_path.push_back(cwd/"..");
 177 }
 178
 179 Builder::~Builder()
 180 {
 181         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 182                 delete i->second;
 183         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 184                 delete i->second;
 185         delete analyzer;
 186 }
 187
 188 int Builder::main()
 189 {
 190         if(prefix.str()!="/usr")
 191         {
 192                 FS::Path pcdir = prefix/"lib"/"pkgconfig";
 193                 if(const char *pcp = getenv("PKG_CONFIG_PATH"))
 194                 {
 195                         vector<string> path = split(pcp, ':');
 196                         bool found = false;
 197                         for(vector<string>::const_iterator i=path.begin(); (!found && i!=path.end()); ++i)
 198                                 found = (*i==pcdir.str());
 199                         if(!found)
 200                         {
 201                                 path.push_back(pcdir.str());
 202                                 setenv("PKG_CONFIG_PATH", join(path.begin(), path.end(), ":").c_str(), true);
 203                         }
 204                 }
 205                 else
 206                         setenv("PKG_CONFIG_PATH", pcdir.str().c_str(), true);
 207         }
 208
 209         if(load_build_file(cwd/build_file))
 210         {
 211                 if(help)
 212                 {
 213                         usage(0, "builder", false);
 214                         return 0;
 215                 }
 216                 else
 217                 {
 218                         IO::print(IO::cerr, "No build info here.\n");
 219                         return 1;
 220                 }
 221         }
 222
 223         main_pkg->configure(cmdline_options, conf_all?2:1);
 224
 225         if(help)
 226         {
 227                 usage(0, "builder", false);
 228                 IO::print("\n");
 229                 package_help();
 230                 return 0;
 231         }
 232
 233         if(conf_only)
 234                 return 0;
 235
 236         if(create_targets())
 237                 return 1;
 238
 239         if(verbose>=2)
 240         {
 241                 IO::print("Building on %s, for %s%s\n", native_arch.get_name(),
 242                         current_arch->get_name(), (current_arch->is_native() ? " (native)" : ""));
 243                 IO::print("Prefix is %s\n", prefix);
 244         }
 245
 246         if(verbose>=1)
 247         {
 248                 unsigned n_packages = 0;
 249                 for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 250                         if(i->second && i->second->is_configured())
 251                                 ++n_packages;
 252                 IO::print("%d active packages, %d targets\n", n_packages, targets.size());
 253         }
 254
 255         if(verbose>=2)
 256         {
 257                 for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 258                 {
 259                         if(!i->second->is_configured())
 260                                 continue;
 261
 262                         IO::print(" %s", i->second->get_name());
 263                         if(dynamic_cast<SourcePackage *>(i->second))
 264                                 IO::print("*");
 265                         unsigned count = 0;
 266                         unsigned to_be_built = 0;
 267                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 268                                 if(j->second->get_package()==i->second)
 269                                 {
 270                                         ++count;
 271                                         if(j->second->needs_rebuild())
 272                                                 ++to_be_built;
 273                                 }
 274                         if(count)
 275                         {
 276                                 IO::print(" (%d targets", count);
 277                                 if(to_be_built)
 278                                         IO::print(", %d to be built", to_be_built);
 279                                 IO::print(")");
 280                         }
 281                         IO::print("\n");
 282                 }
 283         }
 284
 285         if(analyzer)
 286                 analyzer->analyze();
 287
 288         if(!problems.empty())
 289         {
 290                 IO::print(IO::cerr, "The following problems were detected:\n");
 291                 for(ProblemList::iterator i=problems.begin(); i!=problems.end(); ++i)
 292                         IO::print(IO::cerr, "  %s: %s\n", i->package, i->descr);
 293                 if(!analyzer)
 294                         IO::print(IO::cerr, "Please fix them and try again.\n");
 295                 return 1;
 296         }
 297
 298         if(clean)
 299                 exit_code = do_clean();
 300         else if(build)
 301                 exit_code = do_build();
 302
 303         return exit_code;
 304 }
 305
 306 string Builder::run_pkgconfig(const string &pkg, const string &what)
 307 {
 308         vector<string> argv;
 309         argv.push_back("pkg-config");
 310         if(what=="cflags" || what=="libs")
 311                 argv.push_back("--"+what);
 312         else if(what=="flags")
 313         {
 314                 argv.push_back("--cflags");
 315                 argv.push_back("--libs");
 316         }
 317         else
 318                 argv.push_back("--variable="+what);
 319         argv.push_back(pkg);
 320
 321         if(verbose>=4)
 322                 IO::print("Running %s\n", join(argv.begin(), argv.end()));
 323
 324         ExternalTask task(argv, FS::Path());
 325         task.set_stdout(ExternalTask::CAPTURE);
 326         task.set_stderr(ExternalTask::IGNORE);
 327         task.start();
 328         Task::Status status;
 329         while((status=task.check())==Task::RUNNING)
 330                 Time::sleep(10*Time::msec);
 331         if(status==Task::ERROR)
 332                 throw runtime_error(format("pkg-config for package %s failed", pkg));
 333
 334         return task.get_output();
 335 }
 336
 337 Package *Builder::get_package(const string &name)
 338 {
 339         PackageMap::iterator i = packages.find(format("%s/%s", name, current_arch->get_system()));
 340         if(i==packages.end())
 341                 i = packages.find(name);
 342         if(i!=packages.end())
 343                 return i->second;
 344
 345         if(!no_externals)
 346         {
 347                 FS::Path path = get_package_location(name);
 348                 if(!path.empty() && !load_build_file(path/"Build"))
 349                 {
 350                         i = packages.find(name);
 351                         if(i!=packages.end())
 352                                 return i->second;
 353                 }
 354         }
 355
 356         Package *pkg = 0;
 357         try
 358         {
 359                 // Package source not found - create a binary package
 360                 pkg = BinaryPackage::from_pkgconfig(*this, name);
 361         }
 362         catch(...)
 363         {
 364                 problem(name, "not found");
 365         }
 366
 367         packages.insert(PackageMap::value_type(name, pkg));
 368
 369         return pkg;
 370 }
 371
 372 Target *Builder::get_target(const string &n) const
 373 {
 374         TargetMap::const_iterator i = targets.find(n);
 375         if(i!=targets.end())
 376                 return i->second;
 377         return 0;
 378 }
 379
 380 void Builder::apply_profile_template(Config &config, const string &pt) const
 381 {
 382         vector<string> parts = split(pt, '-');
 383
 384         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 385         {
 386                 ProfileTemplateMap::const_iterator j = profile_tmpl.find(*i);
 387                 if(j==profile_tmpl.end())
 388                         continue;
 389
 390                 config.update(j->second);
 391         }
 392 }
 393
 394 void Builder::problem(const string &p, const string &d)
 395 {
 396         problems.push_back(Problem(p, d));
 397 }
 398
 399 void Builder::add_target(Target *t)
 400 {
 401         targets.insert(TargetMap::value_type(t->get_name(), t));
 402         new_tgts.push_back(t);
 403 }
 404
 405 void Builder::usage(const char *reason, const char *argv0, bool brief)
 406 {
 407         if(reason)
 408                 IO::print(IO::cerr, "%s\n", reason);
 409
 410         if(brief)
 411                 IO::print(IO::cerr, "Usage: %s\n", usagemsg);
 412         else
 413         {
 414                 IO::print(IO::cerr, "Builder 1.0\n\n");
 415                 IO::print(IO::cerr, "Usage: %s [options] [<target> ...]\n\n", argv0);
 416                 IO::print(IO::cerr, "Options:\n");
 417                 IO::print(IO::cerr, helpmsg);
 418         }
 419 }
 420
 421 FS::Path Builder::get_package_location(const string &name)
 422 {
 423         if(verbose>=3)
 424                 IO::print("Looking for package %s\n", name);
 425
 426         try
 427         {
 428                 // Try to get source directory with pkgconfig
 429                 string srcdir = strip(run_pkgconfig(name, "source"));
 430                 if(!srcdir.empty())
 431                         return srcdir;
 432         }
 433         catch(...)
 434         { }
 435
 436         if(pkg_dirs.empty())
 437         {
 438                 for(list<FS::Path>::const_iterator i=pkg_path.begin(); i!=pkg_path.end(); ++i)
 439                 {
 440                         list<string> files = list_files(*i);
 441                         for(list<string>::const_iterator j=files.begin(); j!=files.end(); ++j)
 442                         {
 443                                 FS::Path full = *i / *j;
 444                                 if(FS::exists(full/"Build"))
 445                                         pkg_dirs.push_back(full);
 446                         }
 447                 }
 448                 if(verbose>=3)
 449                         IO::print("%d packages found in path\n", pkg_dirs.size());
 450         }
 451
 452         bool msp = !name.compare(0, 3, "msp");
 453         for(list<FS::Path>::const_iterator i=pkg_dirs.begin(); i!=pkg_dirs.end(); ++i)
 454         {
 455                 string base = basename(*i);
 456                 unsigned dash = base.rfind('-');
 457
 458                 if(!base.compare(0, dash, name))
 459                         return *i;
 460                 else if(msp && !base.compare(0, dash-3, name, 3, string::npos))
 461                         return *i;
 462         }
 463
 464         return FS::Path();
 465 }
 466
 467 int Builder::load_build_file(const FS::Path &fn)
 468 {
 469         if(!FS::exists(fn))
 470                 return -1;
 471
 472         IO::BufferedFile in(fn.str());
 473
 474         if(verbose>=3)
 475                 IO::print("Reading %s\n", fn);
 476
 477         DataFile::Parser parser(in, fn.str());
 478         Loader loader(*this, fn.subpath(0, fn.size()-1));
 479         loader.load(parser);
 480
 481         return 0;
 482 }
 483
 484 int Builder::create_targets()
 485 {
 486         Target *world = new VirtualTarget(*this, "world");
 487
 488         Target *def_tgt = new VirtualTarget(*this, "default");
 489         world->add_depend(def_tgt);
 490
 491         Target *install = new VirtualTarget(*this, "install");
 492         world->add_depend(install);
 493
 494         Target *tarballs = new VirtualTarget(*this, "tarballs");
 495         world->add_depend(tarballs);
 496
 497         for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 498         {
 499                 if(!i->second || !i->second->is_configured())
 500                         continue;
 501
 502                 SourcePackage *spkg = dynamic_cast<SourcePackage *>(i->second);
 503                 if(!spkg)
 504                         continue;
 505
 506                 const ComponentList &components = spkg->get_components();
 507                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 508                         j->create_targets();
 509
 510                 if(spkg->get_install_flags()&(SourcePackage::LIB|SourcePackage::INCLUDE))
 511                 {
 512                         PkgConfigFile *pc = new PkgConfigFile(*this, *spkg);
 513                         install->add_depend(toolchain.get_tool("CP").create_target(*pc));
 514                 }
 515         }
 516
 517         // Apply what-ifs
 518         // XXX This does not currently work with targets found during dependency discovery
 519         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 520         {
 521                 FileTarget *tgt = vfs.get_target(cwd/ *i);
 522                 if(!tgt)
 523                 {
 524                         IO::print(IO::cerr, "Unknown what-if target %s\n", *i);
 525                         return -1;
 526                 }
 527                 tgt->touch();
 528         }
 529
 530         // Make the cmdline target depend on all targets mentioned on the command line
 531         Target *cmdline = new VirtualTarget(*this, "cmdline");
 532         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 533         {
 534                 Target *tgt = get_target(*i);
 535                 if(!tgt)
 536                         tgt = vfs.get_target(*i);
 537                 if(!tgt)
 538                         tgt = vfs.get_target(cwd/ *i);
 539                 if(!tgt)
 540                 {
 541                         IO::print("I don't know anything about %s\n", *i);
 542                         return -1;
 543                 }
 544
 545                 cmdline->add_depend(tgt);
 546         }
 547
 548         cmdline->prepare();
 549
 550         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 551                 if(SourcePackage *spkg = dynamic_cast<SourcePackage *>(i->second))
 552                         spkg->get_deps_cache().save();
 553
 554         return 0;
 555 }
 556
 557 int Builder::do_build()
 558 {
 559         Target *cmdline = get_target("cmdline");
 560
 561         unsigned total = 0;
 562         for(map<string, Target *>::const_iterator i=targets.begin(); i!=targets.end(); ++i)
 563                 if(i->second->is_buildable() && i->second->needs_rebuild())
 564                         ++total;
 565
 566         if(!total)
 567         {
 568                 IO::print("Already up to date\n");
 569                 return 0;
 570         }
 571         if(verbose>=1)
 572                 IO::print("Will build %d target%s\n", total, (total!=1 ? "s" : ""));
 573
 574         vector<Task *> tasks;
 575
 576         unsigned count = 0;
 577
 578         bool fail = false;
 579         bool finish = false;
 580
 581         while(!finish)
 582         {
 583                 if(tasks.size()<jobs && !fail)
 584                 {
 585                         Target *tgt = cmdline->get_buildable_target();
 586                         if(tgt)
 587                         {
 588                                 if(tgt->get_tool())
 589                                         IO::print("%-4s  %s\n", tgt->get_tool()->get_tag(), tgt->get_name());
 590                                 Task *task = tgt->build();
 591                                 if(task)
 592                                 {
 593                                         if(verbose>=2)
 594                                                 IO::print("%s\n", task->get_command());
 595                                         if(dry_run)
 596                                         {
 597                                                 task->signal_finished.emit(true);
 598                                                 delete task;
 599                                         }
 600                                         else
 601                                         {
 602                                                 task->start();
 603                                                 tasks.push_back(task);
 604                                         }
 605                                 }
 606
 607                                 if(show_progress)
 608                                         IO::print("%d of %d target%s built\033[1G", count, total, (total!=1 ? "s" : ""));
 609                         }
 610                         else if(tasks.empty())
 611                                 finish = true;
 612                 }
 613                 else
 614                         Time::sleep(10*Time::msec);
 615
 616                 for(unsigned i=0; i<tasks.size();)
 617                 {
 618                         Task::Status status = tasks[i]->check();
 619                         if(status!=Task::RUNNING)
 620                         {
 621                                 ++count;
 622
 623                                 delete tasks[i];
 624                                 tasks.erase(tasks.begin()+i);
 625                                 if(status==Task::ERROR)
 626                                         fail = true;
 627                                 if(tasks.empty() && fail)
 628                                         finish = true;
 629                         }
 630                         else
 631                                 ++i;
 632                 }
 633         }
 634
 635         if(show_progress)
 636                 IO::print("\033[K");
 637         if(fail)
 638                 IO::print("Build failed\n");
 639         else if(show_progress)
 640                 IO::print("Build complete\n");
 641
 642         return fail;
 643 }
 644
 645 int Builder::do_clean()
 646 {
 647         // Cleaning doesn't care about ordering, so a simpler method can be used
 648
 649         set<Target *> clean_tgts;
 650         list<Target *> queue;
 651         queue.push_back(get_target("cmdline"));
 652
 653         while(!queue.empty())
 654         {
 655                 Target *tgt = queue.front();
 656                 queue.erase(queue.begin());
 657
 658                 if(tgt->is_buildable() && (tgt->get_package()==main_pkg || clean>=2))
 659                         clean_tgts.insert(tgt);
 660
 661                 const Target::Dependencies &deps = tgt->get_depends();
 662                 for(list<Target *>::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 663                         if(!clean_tgts.count(*i))
 664                                 queue.push_back(*i);
 665         }
 666
 667         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 668                 if(FileTarget *ft = dynamic_cast<FileTarget *>(*i))
 669                         if(ft->get_mtime())
 670                                 FS::unlink(ft->get_path());
 671
 672         return 0;
 673 }
 674
 675 void Builder::package_help()
 676 {
 677         const Config &config = main_pkg->get_config();
 678         const Config::OptionMap &options = config.get_options();
 679
 680         IO::print("Required packages:\n  ");
 681         const PackageList &requires = main_pkg->get_requires();
 682         for(PackageList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 683         {
 684                 if(i!=requires.begin())
 685                         IO::print(", ");
 686                 IO::print((*i)->get_name());
 687         }
 688         IO::print("\n\nPackage configuration:\n");
 689         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 690         {
 691                 const Config::Option &opt = i->second;
 692                 IO::print("  %s: %s (%s)", opt.name, opt.descr, opt.value);
 693                 if(opt.value!=opt.defv)
 694                         IO::print(" [%s]", opt.defv);
 695                 IO::print("\n");
 696         }
 697 }
 698
 699 string Builder::usagemsg;
 700 string Builder::helpmsg;
 701
 702
 703 Builder::Loader::Loader(Builder &b, const FS::Path &s):
 704         bld(b),
 705         src(s)
 706 {
 707         add("binary_package", &Loader::binpkg);
 708         add("cross_prefix", &Loader::cross_prefix);
 709         add("profile", &Loader::profile);
 710         add("package", &Loader::package);
 711 }
 712
 713 void Builder::Loader::binpkg(const string &n)
 714 {
 715         BinaryPackage *pkg = new BinaryPackage(bld, n);
 716         load_sub(*pkg);
 717         bld.packages.insert(PackageMap::value_type(n, pkg));
 718 }
 719
 720 void Builder::Loader::cross_prefix(const string &a, const string &p)
 721 {
 722         bld.cross_prefixes[a] = p;
 723 }
 724
 725 void Builder::Loader::profile(const string &n)
 726 {
 727         StringMap prf;
 728         ProfileLoader ldr(prf);
 729         load_sub_with(ldr);
 730         bld.profile_tmpl.insert(ProfileTemplateMap::value_type(n, prf));
 731 }
 732
 733 void Builder::Loader::package(const string &n)
 734 {
 735         SourcePackage *pkg = new SourcePackage(bld, n, src);
 736         if(!bld.main_pkg)
 737                 bld.main_pkg = pkg;
 738
 739         load_sub(*pkg);
 740         bld.packages.insert(PackageMap::value_type(n, pkg));
 741 }
 742
 743
 744 Builder::ProfileLoader::ProfileLoader(StringMap &p):
 745         profile(p)
 746 {
 747         add("option", &ProfileLoader::option);
 748 }
 749
 750 void Builder::ProfileLoader::option(const string &o, const string &v)
 751 {
 752         profile.insert(StringMap::value_type(o, v));
 753 }