source/builder.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <fstream>
   9 #include <iostream>
  10 #include <set>
  11 #include <msp/core/error.h>
  12 #include <msp/core/getopt.h>
  13 #include <msp/datafile/parser.h>
  14 #include <msp/path/utils.h>
  15 #include <msp/strings/formatter.h>
  16 #include <msp/strings/utils.h>
  17 #include <msp/time/units.h>
  18 #include <msp/time/utils.h>
  19 #include "action.h"
  20 #include "analyzer.h"
  21 #include "binarypackage.h"
  22 #include "builder.h"
  23 #include "header.h"
  24 #include "install.h"
  25 #include "misc.h"
  26 #include "package.h"
  27 #include "pkgconfig.h"
  28 #include "sharedlibrary.h"
  29 #include "sourcepackage.h"
  30 #include "systemlibrary.h"
  31 #include "tarball.h"
  32 #include "unlink.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         analyzer(0),
  41         build(false),
  42         clean(0),
  43         dry_run(false),
  44         help(false),
  45         verbose(1),
  46         chrome(false),
  47         build_file("Build"),
  48         jobs(1),
  49         conf_all(false),
  50         conf_only(false),
  51         build_all(false),
  52         create_makefile(false)
  53 {
  54         string   analyze_mode;
  55         string   work_dir;
  56         bool     full_paths=false;
  57         unsigned max_depth=5;
  58
  59         GetOpt getopt;
  60         getopt.add_option('a', "analyze",    analyze_mode, GetOpt::REQUIRED_ARG);
  61         getopt.add_option('b', "build",      build,        GetOpt::NO_ARG);
  62         getopt.add_option('c', "clean",      clean,        GetOpt::NO_ARG);
  63         getopt.add_option('f', "file",       build_file,   GetOpt::REQUIRED_ARG);
  64         getopt.add_option('h', "help",       help,         GetOpt::NO_ARG);
  65         getopt.add_option('j', "jobs",       jobs,         GetOpt::REQUIRED_ARG);
  66         getopt.add_option('n', "dry-run",    dry_run,      GetOpt::NO_ARG);
  67         getopt.add_option('v', "verbose",    verbose,      GetOpt::NO_ARG);
  68         getopt.add_option('A', "conf-all",   conf_all,     GetOpt::NO_ARG);
  69         getopt.add_option('B', "build-all",  build_all,    GetOpt::NO_ARG);
  70         getopt.add_option('C', "chdir",      work_dir,     GetOpt::REQUIRED_ARG);
  71         getopt.add_option('W', "what-if",    what_if,      GetOpt::REQUIRED_ARG);
  72         getopt.add_option(     "chrome",     chrome,       GetOpt::NO_ARG);
  73         getopt.add_option(     "conf-only",  conf_only,    GetOpt::NO_ARG);
  74         getopt.add_option(     "full-paths", full_paths,   GetOpt::NO_ARG);
  75         //getopt.add_option(     "makefile",   create_makefile, GetOpt::NO_ARG);
  76         getopt.add_option(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  77         getopt(argc, argv);
  78
  79         if(!analyze_mode.empty())
  80         {
  81                 analyzer=new Analyzer(*this);
  82
  83                 if(analyze_mode=="deps")
  84                         analyzer->set_mode(Analyzer::DEPS);
  85                 else if(analyze_mode=="alldeps")
  86                         analyzer->set_mode(Analyzer::ALLDEPS);
  87                 else if(analyze_mode=="rebuild")
  88                         analyzer->set_mode(Analyzer::REBUILD);
  89                 else if(analyze_mode=="rdeps")
  90                         analyzer->set_mode(Analyzer::RDEPS);
  91                 else
  92                         throw UsageError("Invalid analyze mode");
  93
  94                 analyzer->set_max_depth(max_depth);
  95                 analyzer->set_full_paths(full_paths);
  96         }
  97         else if(!clean && !create_makefile)
  98                 build=true;
  99
 100         const list<string> &args=getopt.get_args();
 101         for(list<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
 102         {
 103                 unsigned equal=i->find('=');
 104                 if(equal!=string::npos)
 105                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 106                 else
 107                         cmdline_targets.push_back(*i);
 108         }
 109
 110         if(cmdline_targets.empty())
 111                 cmdline_targets.push_back("default");
 112
 113         if(!work_dir.empty())
 114                 chdir(work_dir.c_str());
 115
 116         cwd=Path::getcwd();
 117
 118         Architecture &native_arch=archs.insert(ArchMap::value_type("native", Architecture(*this, "native"))).first->second;
 119         native_arch.set_tool("CC",  "gcc");
 120         native_arch.set_tool("CXX", "g++");
 121         native_arch.set_tool("LD",  "gcc");
 122         native_arch.set_tool("LXX", "g++");
 123         native_arch.set_tool("AR",  "ar");
 124
 125         const char *home=getenv("HOME");
 126         if(home)
 127                 load_build_file((Path::Path(home)/".builderrc").str());
 128 }
 129
 130 /**
 131 Gets a package with the specified name, possibly creating it.
 132
 133 @param   n  Package name
 134
 135 @return  Pointer to the package, or 0 if the package could not be located
 136 */
 137 Package *Builder::get_package(const string &n)
 138 {
 139         PackageMap::iterator i=packages.find(n);
 140         if(i!=packages.end())
 141                 return i->second;
 142
 143         // Try to get source directory with pkgconfig
 144         list<string> argv;
 145         argv.push_back("pkg-config");
 146         argv.push_back("--variable=source");
 147         argv.push_back(n);
 148         string srcdir=strip(run_command(argv));
 149
 150         PathList dirs;
 151         if(!srcdir.empty())
 152                 dirs.push_back(srcdir);
 153
 154         // Make some other guesses about the source directory
 155         string dirname=n;
 156         if(!dirname.compare(0, 3, "msp"))
 157                 dirname.erase(0, 3);
 158         dirs.push_back(cwd/dirname);
 159         dirs.push_back(cwd/".."/dirname);
 160
 161         // Go through the candidate directories and look for a Build file
 162         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 163                 if(!load_build_file(*j/"Build"))
 164                 {
 165                         i=packages.find(n);
 166                         if(i!=packages.end())
 167                                 return i->second;
 168                         break;
 169                 }
 170
 171         // Package source not found - create a binary package
 172         Package *pkg=BinaryPackage::from_pkgconfig(*this, n);
 173
 174         packages.insert(PackageMap::value_type(n, pkg));
 175
 176         if(!pkg)
 177                 problem(n, "not found");
 178
 179         return pkg;
 180 }
 181
 182 /**
 183 Returns the target with the given name, or 0 if no such target exists.
 184 */
 185 Target *Builder::get_target(const string &n) const
 186 {
 187         TargetMap::const_iterator i=targets.find(n);
 188         if(i!=targets.end())
 189                 return i->second;
 190         return 0;
 191 }
 192
 193 /**
 194 Tries to locate a header included from a given location and with a given include
 195 path.  Considers known targets as well as existing files.  If a matching target
 196 is not found but a file exists, a new SystemHeader target will be created and
 197 returned.
 198 */
 199 Target *Builder::get_header(const string &include, const string &, const string &from, const list<string> &path)
 200 {
 201         string hash(8, 0);
 202         update_hash(hash, from);
 203         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 204                 update_hash(hash, *i);
 205
 206         string id=hash+include;
 207         TargetMap::iterator i=includes.find(id);
 208         if(i!=includes.end())
 209                 return i->second;
 210
 211         string fn=include.substr(1);
 212         Target *tgt=0;
 213         if(include[0]=='"' && (tgt=get_header(Path::Path(from)/fn)))
 214                 ;
 215         else if((tgt=get_header(Path::Path("/usr/include")/fn)))
 216                 ;
 217         //XXX Determine the C++ header location dynamically
 218         else if((tgt=get_header(Path::Path("/usr/include/c++/4.1.2")/fn)))
 219                 ;
 220         else
 221         {
 222                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 223                         tgt=get_header(cwd/ *j/fn);
 224         }
 225
 226         includes.insert(TargetMap::value_type(id, tgt));
 227
 228         return tgt;
 229 }
 230
 231 /**
 232 Tries to locate a library with the given library path.  Considers known targets
 233 as well as existing files.  If a matching target is not found but a file exists,
 234 a new SystemLibrary target will be created and returned.
 235
 236 @param   lib   Name of the library to get (without "lib" prefix or extension)
 237 @param   path  List of paths to search for the library
 238 @param   mode  Shared / static mode
 239
 240 @return  Some kind of library target, if a match was found
 241 */
 242 Target *Builder::get_library(const string &lib, const string &arch, const list<string> &path, LibMode mode)
 243 {
 244         string hash(8, 0);
 245         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 246                 update_hash(hash, *i);
 247
 248         //XXX Incorporate mode into id
 249         string id=hash+lib;
 250         TargetMap::iterator i=libraries.find(id);
 251         if(i!=libraries.end())
 252                 return i->second;
 253
 254         StringList syspath;
 255         if(arch=="native")
 256         {
 257                 syspath.push_back("/lib");
 258                 syspath.push_back("/usr/lib");
 259         }
 260         else
 261                 syspath.push_back("/usr/"+get_architecture(arch).get_prefix()+"/lib");
 262
 263         Target *tgt=0;
 264         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 265                 tgt=get_library(lib, arch, *j, mode);
 266         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 267                 tgt=get_library(lib, arch, cwd/ *j, mode);
 268
 269         libraries.insert(TargetMap::value_type(id, tgt));
 270
 271         return tgt;
 272 }
 273
 274 const Architecture &Builder::get_architecture(const string &arch) const
 275 {
 276         ArchMap::const_iterator i=archs.find(arch);
 277         if(i==archs.end())
 278                 throw InvalidParameterValue("Unknown architecture");
 279
 280         return i->second;
 281 }
 282
 283 void Builder::apply_profile_template(Config &config, const string &pt) const
 284 {
 285         vector<string> parts=split(pt, '-');
 286
 287         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 288         {
 289                 ProfileTemplateMap::const_iterator j=profile_tmpl.find(*i);
 290                 if(j==profile_tmpl.end())
 291                         continue;
 292
 293                 config.update(j->second);
 294         }
 295 }
 296
 297 void Builder::problem(const string &p, const string &d)
 298 {
 299         problems.push_back(Problem(p, d));
 300 }
 301
 302 /**
 303 Adds a target to both the target map and the new target queue.  Called from
 304 Target constructor.
 305 */
 306 void Builder::add_target(Target *t)
 307 {
 308         targets.insert(TargetMap::value_type(t->get_name(), t));
 309         new_tgts.push_back(t);
 310 }
 311
 312 int Builder::main()
 313 {
 314         if(load_build_file(cwd/build_file))
 315         {
 316                 cerr<<"No build info here.\n";
 317                 return 1;
 318         }
 319
 320         main_pkg->configure(cmdline_options, conf_all?2:1);
 321
 322         if(help)
 323         {
 324                 usage(0, "builder", false);
 325                 cout<<'\n';
 326                 package_help();
 327                 return 0;
 328         }
 329
 330         if(!conf_only && create_targets())
 331                 return 1;
 332
 333         PackageList all_reqs=main_pkg->collect_requires();
 334
 335         for(PackageList::const_iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 336         {
 337                 SourcePackage *spkg=dynamic_cast<SourcePackage *>(*i);
 338                 string prob;
 339                 if(spkg && spkg->get_arch()!=main_pkg->get_arch())
 340                         problem(spkg->get_name(), format("wrong architecture (%s)", spkg->get_arch()));
 341         }
 342
 343         if(!problems.empty())
 344         {
 345                 cerr<<"The following problems were detected:\n";
 346                 for(ProblemList::iterator i=problems.begin(); i!=problems.end(); ++i)
 347                         cerr<<"  "<<i->package<<": "<<i->descr<<'\n';
 348                 cerr<<"Please fix them and try again.\n";
 349                 return 1;
 350         }
 351
 352         if(conf_only)
 353                 return 0;
 354
 355         cout<<all_reqs.size()<<" active packages, "<<targets.size()<<" targets\n";
 356         if(verbose>=2)
 357         {
 358                 for(PackageList::const_iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 359                 {
 360                         cout<<' '<<(*i)->get_name();
 361                         if(dynamic_cast<SourcePackage *>(*i))
 362                                 cout<<'*';
 363                         unsigned count=0;
 364                         unsigned ood_count=0;
 365                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 366                                 if(j->second->get_package()==*i)
 367                                 {
 368                                         ++count;
 369                                         if(j->second->get_rebuild())
 370                                                 ++ood_count;
 371                                 }
 372                         if(count)
 373                         {
 374                                 cout<<" ("<<count<<" targets";
 375                                 if(ood_count)
 376                                         cout<<", "<<ood_count<<" out-of-date";
 377                                 cout<<')';
 378                         }
 379                         cout<<'\n';
 380                 }
 381         }
 382
 383         if(analyzer)
 384                 analyzer->analyze();
 385
 386         //if(create_makefile
 387
 388         if(clean)
 389                 exit_code=do_clean();
 390         else if(build)
 391                 exit_code=do_build();
 392
 393         return exit_code;
 394 }
 395
 396 Builder::~Builder()
 397 {
 398         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 399                 delete i->second;
 400         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 401                 delete i->second;
 402         delete analyzer;
 403 }
 404
 405 void Builder::usage(const char *reason, const char *argv0, bool brief)
 406 {
 407         if(reason)
 408                 cerr<<reason<<'\n';
 409
 410         if(brief)
 411                 cerr<<"Usage: "<<argv0<<" [-a|--analyze MODE] [-b|--build] [-c|--clean] [-f|--file FILE] [-h|--help] [-j|--jobs NUM] [-n||--dry-run] [-v|--verbose] [-A|--conf-all] [-B|--build-all] [-C|--chdir DIRECTORY] [-W|--what-if FILE] [--chrome] [--conf-only] [--full-paths] [--max-depth NUM] [<target> ...]";
 412         else
 413         {
 414                 cerr<<
 415                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 416                         "\n"
 417                         "Options:\n"
 418                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 419                         "  -b, --build         Perform build even if doing analysis.\n"
 420                         "  -c, --clean         Clean buildable targets.\n"
 421                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 422                         "  -h, --help          Print this message.\n"
 423                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 424                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 425                         "  -v, --verbose       Print more information about what's going on.\n"
 426                         "  -A, --conf-all      Apply configuration to all packages.\n"
 427                         "  -B, --build-all     Build all targets unconditionally.\n"
 428                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 429                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 430                         "  --chrome            Use extra chrome to print status.\n"
 431                         "  --conf-only         Stop after configuring packages.\n"
 432                         "  --full-paths        Output full paths in analysis.\n"
 433                         //"  --makefile          Create a makefile for this package.\n"
 434                         "  --max-depth NUM     Maximum depth to show in analysis.\n";
 435         }
 436 }
 437
 438 /**
 439 Loads the given build file.
 440
 441 @param   fn  Path to the file
 442
 443 @return  0 on success, -1 if the file could not be opened
 444 */
 445 int Builder::load_build_file(const Path::Path &fn)
 446 {
 447         ifstream in(fn.str().c_str());
 448         if(!in)
 449                 return -1;
 450
 451         if(verbose>=3)
 452                 cout<<"Reading "<<fn<<'\n';
 453
 454         DataFile::Parser parser(in, fn.str());
 455         Loader loader(*this, fn.subpath(0, fn.size()-1));
 456         loader.load(parser);
 457
 458         return 0;
 459 }
 460
 461 /**
 462 Creates targets for all packages and prepares them for building.
 463
 464 @return  0 if everything went ok, -1 if something bad happened and a build
 465          shouldn't be attempted
 466 */
 467 int Builder::create_targets()
 468 {
 469         Target *world=new VirtualTarget(*this, "world");
 470
 471         Target *def_tgt=new VirtualTarget(*this, "default");
 472         world->add_depend(def_tgt);
 473
 474         Target *install=new VirtualTarget(*this, "install");
 475         world->add_depend(install);
 476
 477         Target *tarballs=new VirtualTarget(*this, "tarballs");
 478         world->add_depend(tarballs);
 479
 480         PackageList all_reqs=main_pkg->collect_requires();
 481         for(PackageList::iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 482         {
 483                 SourcePackage *spkg=dynamic_cast<SourcePackage *>(*i);
 484                 if(!spkg)
 485                         continue;
 486
 487                 const ComponentList &components=spkg->get_components();
 488                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 489                         j->create_targets();
 490
 491                 if(spkg->get_install_flags()&(SourcePackage::LIB|SourcePackage::INCLUDE))
 492                 {
 493                         PkgConfig *pc=new PkgConfig(*this, *spkg);
 494                         install->add_depend(new Install(*this, *spkg, *pc));
 495                 }
 496
 497                 tarballs->add_depend(new TarBall(*this, *spkg));
 498         }
 499
 500         // Find dependencies until no new targets are created
 501         while(!new_tgts.empty())
 502         {
 503                 Target *tgt=new_tgts.front();
 504                 new_tgts.erase(new_tgts.begin());
 505                 tgt->find_depends();
 506                 if(!tgt->get_depends_ready())
 507                         new_tgts.push_back(tgt);
 508         }
 509
 510         // Apply what-ifs
 511         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 512         {
 513                 Target *tgt=get_target((cwd/ *i).str());
 514                 if(!tgt)
 515                 {
 516                         cerr<<"Unknown what-if target "<<*i<<'\n';
 517                         return -1;
 518                 }
 519                 tgt->touch();
 520         }
 521
 522         // Make the cmdline target depend on all targets mentioned on the command line
 523         Target *cmdline=new VirtualTarget(*this, "cmdline");
 524         bool build_world=false;
 525         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 526         {
 527                 Target *tgt=get_target(*i);
 528                 if(!tgt)
 529                         tgt=get_target((cwd/ *i).str());
 530                 if(!tgt)
 531                 {
 532                         cerr<<"I don't know anything about "<<*i<<'\n';
 533                         return -1;
 534                 }
 535                 if(tgt==world)
 536                         build_world=true;
 537                 cmdline->add_depend(tgt);
 538         }
 539
 540         /* If world is to be built, prepare cmdline.  If not, add cmdline to world
 541            and prepare world.  I don't really like this, but it keeps the graph
 542            acyclic. */
 543         if(build_world)
 544                 cmdline->prepare();
 545         else
 546         {
 547                 world->add_depend(cmdline);
 548                 world->prepare();
 549         }
 550
 551         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 552                 if(SourcePackage *spkg=dynamic_cast<SourcePackage *>(i->second))
 553                         spkg->get_deps_cache().save();
 554
 555         return 0;
 556 }
 557
 558 /**
 559 Check if a header exists, either as a target or a file.  Either an existing
 560 target or a new SystemHeader target will be returned.
 561 */
 562 Target *Builder::get_header(const Msp::Path::Path &fn)
 563 {
 564         Target *tgt=get_target(fn.str());
 565         if(tgt) return tgt;
 566
 567         if(Path::exists(fn))
 568         {
 569                 tgt=new SystemHeader(*this, fn.str());
 570                 return tgt;
 571         }
 572         return 0;
 573 }
 574
 575 Target *Builder::get_library(const string &lib, const string &arch, const Path::Path &path, LibMode mode)
 576 {
 577         // Populate a list of candidate filenames
 578         StringList candidates;
 579
 580         if(mode!=ALL_STATIC)
 581         {
 582                 if(arch=="win32")
 583                         candidates.push_back("lib"+lib+".dll");
 584                 else
 585                         candidates.push_back("lib"+lib+".so");
 586         }
 587
 588         /* Static libraries are always considered, since sometimes shared versions
 589         may not be available */
 590         candidates.push_back("lib"+lib+".a");
 591         if(arch=="win32")
 592                 candidates.push_back("lib"+lib+".dll.a");
 593
 594         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 595         {
 596                 string full=(path/ *i).str();
 597                 Target *tgt=get_target(full);
 598
 599                 if(tgt)
 600                 {
 601                         Target *real_tgt=tgt;
 602                         if(dynamic_cast<Install *>(tgt))
 603                                 real_tgt=real_tgt->get_depends().front();
 604
 605                         /* Ignore dynamic libraries from local packages unless library mode is
 606                         DYNAMIC */
 607                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 608                                 continue;
 609                         else if(tgt)
 610                                 return tgt;
 611                 }
 612                 else if(Path::exists(full))
 613                 {
 614                         tgt=new SystemLibrary(*this, full);
 615                         return tgt;
 616                 }
 617         }
 618
 619         return 0;
 620 }
 621
 622 /**
 623 Updates a hash with a string.  This is used from get_header and get_library.
 624 */
 625 void Builder::update_hash(string &hash, const string &value)
 626 {
 627         for(unsigned i=0; i<value.size(); ++i)
 628                 hash[i%hash.size()]^=value[i];
 629 }
 630
 631 /**
 632 This function supervises the build process, starting new actions when slots
 633 become available.
 634 */
 635 int Builder::do_build()
 636 {
 637         Target *cmdline=get_target("cmdline");
 638
 639         unsigned total=cmdline->count_rebuild();
 640         if(!total)
 641         {
 642                 cout<<"Already up to date\n";
 643                 return 0;
 644         }
 645         cout<<"Will build "<<total<<" target(s)\n";
 646
 647         vector<Action *> actions;
 648
 649         if(chrome)
 650                 cout<<"0 targets built\n";
 651         unsigned count=0;
 652
 653         bool fail=false;
 654         bool finish=false;
 655
 656         while(!finish)
 657         {
 658                 if(actions.size()<jobs && !fail)
 659                 {
 660                         Target *tgt=cmdline->get_buildable_target();
 661                         if(tgt)
 662                         {
 663                                 Action *action=tgt->build();
 664                                 if(action)
 665                                         actions.push_back(action);
 666                         }
 667                         else if(actions.empty())
 668                                 finish=true;
 669                 }
 670                 else
 671                         Time::sleep(10*Time::msec);
 672
 673                 for(unsigned i=0; i<actions.size();)
 674                 {
 675                         int status=actions[i]->check();
 676                         if(status>=0)
 677                         {
 678                                 ++count;
 679                                 if(chrome)
 680                                 {
 681                                         cout<<"\e["<<actions.size()+1<<'A';
 682                                         cout<<count<<" targets built\n";
 683                                         if(i)
 684                                                 cout<<"\e["<<i<<"B";
 685                                         cout<<"\e[M";
 686                                         if(i<actions.size()-1)
 687                                                 cout<<"\e["<<actions.size()-i-1<<"B";
 688                                         cout.flush();
 689                                 }
 690                                 delete actions[i];
 691                                 actions.erase(actions.begin()+i);
 692                                 if(status>0)
 693                                         fail=true;
 694                                 if(actions.empty() && fail)
 695                                         finish=true;
 696                         }
 697                         else
 698                                 ++i;
 699                 }
 700         }
 701
 702         if(fail)
 703                 cout<<"Build failed\n";
 704
 705         return fail?1:0;
 706 }
 707
 708 /**
 709 Cleans buildable targets.  If clean is 1, cleans only this package.  If
 710 clean is 2 or greater, cleans all buildable packages.
 711 */
 712 int Builder::do_clean()
 713 {
 714         // Cleaning doesn't care about ordering, so a simpler method can be used
 715
 716         set<Target *> clean_tgts;
 717         TargetList queue;
 718         queue.push_back(get_target("cmdline"));
 719
 720         while(!queue.empty())
 721         {
 722                 Target *tgt=queue.front();
 723                 queue.erase(queue.begin());
 724
 725                 if(tgt->get_buildable() && (tgt->get_package()==main_pkg || clean>=2))
 726                         clean_tgts.insert(tgt);
 727
 728                 const TargetList &deps=tgt->get_depends();
 729                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 730                         if(!clean_tgts.count(*i))
 731                                 queue.push_back(*i);
 732         }
 733
 734         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 735         {
 736                 Action *action=new Unlink(*this, **i);
 737                 while(action->check()<0);
 738                 delete action;
 739         }
 740
 741         return 0;
 742 }
 743
 744 /**
 745 Prints out information about the default package.
 746 */
 747 void Builder::package_help()
 748 {
 749         const Config &config=main_pkg->get_config();
 750         const Config::OptionMap &options=config.get_options();
 751
 752         cout<<"Required packages:\n  ";
 753         const PackageList &requires=main_pkg->get_requires();
 754         for(PackageList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 755         {
 756                 if(i!=requires.begin())
 757                         cout<<", ";
 758                 cout<<(*i)->get_name();
 759         }
 760         cout<<"\n\n";
 761         cout<<"Package configuration:\n";
 762         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 763         {
 764                 const Config::Option &opt=i->second;
 765                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 766         }
 767 }
 768
 769 Application::RegApp<Builder> Builder::reg;
 770
 771
 772 Builder::Loader::Loader(Builder &b, const Path::Path &s):
 773         bld(b),
 774         src(s)
 775 {
 776         add("architecture", &Loader::architecture);
 777         add("binary_package", &Loader::binpkg);
 778         add("profile", &Loader::profile);
 779         add("package", &Loader::package);
 780 }
 781
 782 void Builder::Loader::architecture(const string &n)
 783 {
 784         Architecture arch(bld, n);
 785         load_sub(arch);
 786         bld.archs.insert(ArchMap::value_type(n, arch));
 787 }
 788
 789 void Builder::Loader::binpkg(const string &n)
 790 {
 791         BinaryPackage *pkg=new BinaryPackage(bld, n);
 792         load_sub(*pkg);
 793         bld.packages.insert(PackageMap::value_type(n, pkg));
 794 }
 795
 796 void Builder::Loader::profile(const string &n)
 797 {
 798         StringMap prf;
 799         load_sub<ProfileLoader>(prf);
 800         bld.profile_tmpl.insert(ProfileTemplateMap::value_type(n, prf));
 801 }
 802
 803 void Builder::Loader::package(const string &n)
 804 {
 805         SourcePackage *pkg=new SourcePackage(bld, n, src);
 806         if(!bld.main_pkg)
 807                 bld.main_pkg=pkg;
 808
 809         load_sub(*pkg);
 810         bld.packages.insert(PackageMap::value_type(n, pkg));
 811 }
 812
 813
 814 Builder::ProfileLoader::ProfileLoader(StringMap &p):
 815         profile(p)
 816 {
 817         add("option", &ProfileLoader::option);
 818 }
 819
 820 void Builder::ProfileLoader::option(const string &o, const string &v)
 821 {
 822         profile.insert(StringMap::value_type(o, v));
 823 }