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