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