source/builder.cpp

   1 #include <fstream>
   2 #include <iostream>
   3 #include <msp/progress.h>
   4 #include <msp/strconv.h>
   5 #include <msp/strutils.h>
   6 #include <msp/core/error.h>
   7 #include <msp/getopt++/getopt++.h>
   8 #include <msp/parser/parser.h>
   9 #include <msp/path/utils.h>
  10 #include <msp/time/units.h>
  11 #include <msp/time/utils.h>
  12 #include "action.h"
  13 #include "analyzer.h"
  14 #include "builder.h"
  15 #include "executable.h"
  16 #include "header.h"
  17 #include "install.h"
  18 #include "misc.h"
  19 #include "objectfile.h"
  20 #include "package.h"
  21 #include "pkgconfig.h"
  22 #include "sharedlibrary.h"
  23 #include "staticlibrary.h"
  24 #include "systemlibrary.h"
  25 #include "virtualtarget.h"
  26
  27 using namespace std;
  28 using namespace Msp;
  29
  30 Builder::Builder(int argc, char **argv):
  31         analyzer(0),
  32         do_build(true),
  33         verbose(1),
  34         chrome(false),
  35         build_file("Build"),
  36         jobs(1)
  37 {
  38         GetOpt getopt;
  39         getopt.add_option(GetOpt::Option('a', "analyze", GetOpt::REQUIRED));
  40         getopt.add_option(GetOpt::Option('b', "build", GetOpt::NONE));
  41         getopt.add_option(GetOpt::Option('c', "clean", GetOpt::NONE));
  42         getopt.add_option(GetOpt::Option('f', "file", GetOpt::REQUIRED, "Build"));
  43         getopt.add_option(GetOpt::Option('h', "help", GetOpt::NONE));
  44         getopt.add_option(GetOpt::Option('j', "jobs", GetOpt::REQUIRED, "1"));
  45         getopt.add_option(GetOpt::Option('n', "dry-run", GetOpt::NONE));
  46         getopt.add_option(GetOpt::Option('v', "verbose", GetOpt::NONE));
  47         getopt.add_option(GetOpt::Option('A', "conf-all", GetOpt::NONE));
  48         getopt.add_option(GetOpt::Option('B', "build-all", GetOpt::NONE));
  49         getopt.add_option(GetOpt::Option('C', "chdir", GetOpt::REQUIRED));
  50         getopt.add_option(GetOpt::Option('W', "what-if", GetOpt::REQUIRED));
  51         getopt.add_option(GetOpt::Option("chrome", GetOpt::NONE));
  52         getopt.add_option(GetOpt::Option("conf-only", GetOpt::NONE));
  53         getopt.add_option(GetOpt::Option("full-paths", GetOpt::NONE));
  54         getopt.add_option(GetOpt::Option("max-depth", GetOpt::REQUIRED));
  55         int index=getopt(argc, argv);
  56
  57         verbose+=getopt['v'].count();
  58
  59         if(getopt['a'])
  60         {
  61                 analyzer=new Analyzer(*this);
  62
  63                 string mode=getopt['a'].arg();
  64                 if(mode=="deps")
  65                         analyzer->set_mode(Analyzer::DEPS);
  66                 else if(mode=="alldeps")
  67                         analyzer->set_mode(Analyzer::ALLDEPS);
  68                 else if(mode=="rebuild")
  69                         analyzer->set_mode(Analyzer::REBUILD);
  70                 else if(mode=="rdeps")
  71                         analyzer->set_mode(Analyzer::RDEPS);
  72                 else
  73                         throw UsageError("Invalid analysis mode");
  74
  75                 if(getopt["max-depth"])
  76                         analyzer->set_max_depth(strtol(getopt["max-depth"].arg()));
  77                 analyzer->set_full_paths(getopt["full-paths"]);
  78
  79                 if(!getopt['b'])
  80                         do_build=false;
  81         }
  82
  83         dry_run=getopt['n'];
  84         jobs=max(strtol(getopt['j'].arg()), 1L);
  85         chrome=getopt["chrome"];
  86         conf_all=getopt['A'];
  87         conf_only=getopt["conf-only"];
  88         build_file=getopt['f'].arg();
  89         build_all=getopt['B'];
  90         help=getopt['h'];
  91
  92         if(getopt['C'])
  93                 chdir(getopt['C'].arg().c_str());
  94
  95         for(int i=index; i<argc; ++i)
  96         {
  97                 string v(argv[i]);
  98                 unsigned equal=v.find('=');
  99                 if(equal!=string::npos)
 100                         cmdline_options.insert(RawOptionMap::value_type(v.substr(0, equal), v.substr(equal+1)));
 101                 else
 102                         cmdline_targets.push_back(argv[i]);
 103         }
 104
 105         if(cmdline_targets.empty())
 106                 cmdline_targets.push_back("default");
 107
 108         if(getopt['W'])
 109                 what_if.push_back(getopt['W'].arg());
 110
 111         cwd=Path::getcwd();
 112 }
 113
 114 /**
 115 Gets a package with the specified name, possibly creating it.
 116
 117 @param   n  Package name
 118
 119 @return  Pointer to the package, or 0 if the package could not be located
 120 */
 121 Package *Builder::get_package(const string &n)
 122 {
 123         PackageMap::iterator i=packages.find(n);
 124         if(i!=packages.end())
 125                 return i->second;
 126
 127         // Try to get source directory with pkgconfig
 128         list<string> argv;
 129         argv.push_back("pkg-config");
 130         argv.push_back("--variable=source");
 131         argv.push_back(n);
 132         string srcdir=strip(run_command(argv));
 133
 134         PathList dirs;
 135         if(!srcdir.empty())
 136                 dirs.push_back(srcdir);
 137
 138         // Make some other guesses about the source directory
 139         string dirname=n;
 140         if(!dirname.compare(0, 3, "msp"))
 141                 dirname.erase(0, 3);
 142         dirs.push_back(cwd/dirname);
 143         dirs.push_back(cwd/".."/dirname);
 144
 145         // Go through the candidate directories and look for a Build file
 146         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 147                 if(!load_build_file(*j/"Build"))
 148                 {
 149                         i=packages.find(n);
 150                         if(i!=packages.end())
 151                                 return i->second;
 152                         break;
 153                 }
 154
 155         // Package source not found - create a binary package
 156         Package *pkg=Package::create(*this, n);
 157         packages.insert(PackageMap::value_type(n, pkg));
 158         if(pkg)
 159                 new_pkgs.push_back(pkg);
 160
 161         return pkg;
 162 }
 163
 164 /**
 165 Returns the target with the given name, or 0 if no such target exists.
 166 */
 167 Target *Builder::get_target(const string &n)
 168 {
 169         TargetMap::iterator i=targets.find(n);
 170         if(i!=targets.end())
 171                 return i->second;
 172         return 0;
 173 }
 174
 175 /**
 176 Tries to locate a header included from a given location and with a given include
 177 path.  Considers known targets as well as existing files.  If a matching target
 178 is not found but a file exists, a new SystemHeader target will be created and
 179 returned.
 180 */
 181 Target *Builder::get_header(const string &include, const string &from, const list<string> &path)
 182 {
 183         string hash(8, 0);
 184         update_hash(hash, from);
 185         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 186                 update_hash(hash, *i);
 187
 188         string id=hash+include;
 189         TargetMap::iterator i=includes.find(id);
 190         if(i!=includes.end())
 191                 return i->second;
 192
 193         string fn=include.substr(1);
 194         Target *tgt=0;
 195         if(include[0]=='"' && (tgt=get_header(Path::Path(from)/fn)))
 196                 ;
 197         else if((tgt=get_header(Path::Path("/usr/include")/fn)))
 198                 ;
 199         //XXX Determine the C++ header location dynamically
 200         else if((tgt=get_header(Path::Path("/usr/include/c++/4.1.2")/fn)))
 201                 ;
 202         else
 203         {
 204                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 205                         tgt=get_header(cwd/ *j/fn);
 206         }
 207
 208         includes.insert(TargetMap::value_type(id, tgt));
 209
 210         return tgt;
 211 }
 212
 213 /**
 214 Tries to locate a library with the given library path.  Considers known targets
 215 as well as existing files.  If a matching target is not found but a file exists,
 216 a new SystemLibrary target will be created and returned.
 217
 218 @param   lib   Name of the library to get (without "lib" prefix or extension)
 219 @param   path  List of paths to search for the library
 220 @param   mode  Shared / shared mode - 0: always shared, 1: static for buildable
 221                packages, otherwise shared, 2: always static
 222
 223 @return  Some kind of library target, if a match was found
 224 */
 225 Target *Builder::get_library(const string &lib, const list<string> &path, unsigned mode)
 226 {
 227         string hash(8, 0);
 228         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 229                 update_hash(hash, *i);
 230
 231         //XXX Incorporate mode into id
 232         string id=hash+lib;
 233         TargetMap::iterator i=libraries.find(id);
 234         if(i!=libraries.end())
 235                 return i->second;
 236
 237         Target *tgt=0;
 238         if((tgt=get_library(lib, "/lib", mode)))
 239                 ;
 240         else if((tgt=get_library(lib, "/usr/lib", mode)))
 241                 ;
 242         else
 243         {
 244                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 245                         tgt=get_library(lib, cwd/ *j, mode);
 246         }
 247
 248         libraries.insert(TargetMap::value_type(id, tgt));
 249
 250         return tgt;
 251 }
 252
 253 int Builder::main()
 254 {
 255         if(load_build_file(cwd/build_file))
 256         {
 257                 cerr<<"No build info here.\n";
 258                 return 1;
 259         }
 260
 261         default_pkg=packages.begin()->second;
 262
 263         while(!new_pkgs.empty())
 264         {
 265                 Package *pkg=new_pkgs.front();
 266                 new_pkgs.erase(new_pkgs.begin());
 267                 pkg->resolve_refs();
 268         }
 269
 270         default_pkg->configure(cmdline_options, conf_all?2:1);
 271
 272         if(help)
 273         {
 274                 usage("builder", false);
 275                 cout<<'\n';
 276                 package_help();
 277                 return 0;
 278         }
 279
 280         StringList missing;
 281         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 282                 if(!i->second)
 283                         missing.push_back(i->first);
 284
 285         if(!missing.empty())
 286         {
 287                 missing.sort();
 288                 cerr<<"The following packages were not found on the system:\n";
 289                 for(list<string>::iterator i=missing.begin(); i!=missing.end(); ++i)
 290                         cerr<<"  "<<*i<<'\n';
 291                 cerr<<"Please install them and try again.\n";
 292                 return 1;
 293         }
 294
 295         if(conf_only)
 296                 return 0;
 297
 298         if(create_targets())
 299                 return 1;
 300
 301         cout<<packages.size()<<" packages, "<<targets.size()<<" targets\n";
 302         if(verbose>=2)
 303         {
 304                 for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 305                 {
 306                         cout<<' '<<i->second->get_name();
 307                         if(i->second->get_buildable())
 308                                 cout<<'*';
 309                         unsigned count=0;
 310                         unsigned ood_count=0;
 311                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 312                                 if(j->second->get_package()==i->second)
 313                                 {
 314                                         ++count;
 315                                         if(j->second->get_rebuild())
 316                                                 ++ood_count;
 317                                 }
 318                         if(count)
 319                         {
 320                                 cout<<" ("<<count<<" targets";
 321                                 if(ood_count)
 322                                         cout<<", "<<ood_count<<" out-of-date";
 323                                 cout<<')';
 324                         }
 325                         cout<<'\n';
 326                 }
 327         }
 328
 329         if(analyzer)
 330                 analyzer->analyze();
 331
 332         if(do_build)
 333                 build();
 334
 335         return exit_code;
 336 }
 337
 338 Builder::~Builder()
 339 {
 340         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 341                 delete i->second;
 342         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 343                 delete i->second;
 344         delete analyzer;
 345 }
 346
 347 void Builder::usage(const char *argv0, bool brief)
 348 {
 349         if(brief)
 350                 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] [--full-paths] [--max-depth NUM] [<target> ...]";
 351         else
 352         {
 353                 cerr<<
 354                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 355                         "\n"
 356                         "Options:\n"
 357                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 358                         "  -b, --build         Perform build even if doing analysis.\n"
 359                         "  -c, --clean         Clean buildable targets.\n"
 360                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 361                         "  -h, --help          Print this message.\n"
 362                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 363                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 364                         "  -v, --verbose       Print more information about what's going on.\n"
 365                         "  -A, --conf-all      Apply configuration to all packages.\n"
 366                         "  -B, --build-all     Build all targets unconditionally.\n"
 367                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 368                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 369                         "  --chrome            Use extra chrome to print status.\n"
 370                         "  --conf-only         Stop after configuring packages.\n"
 371                         "  --full-paths        Output full paths in analysis.\n"
 372                         "  --max-depth NUM     Maximum depth to show in analysis.\n";
 373         }
 374 }
 375
 376 /**
 377 Loads the given build file.
 378
 379 @param   fn  Path to the file
 380
 381 @return  0 on success, -1 if the file could not be opened
 382 */
 383 int Builder::load_build_file(const Path::Path &fn)
 384 {
 385         ifstream in(fn.str().c_str());
 386         if(!in)
 387                 return -1;
 388
 389         Parser::Parser parser(in, fn.str());
 390         Loader loader(*this, fn.subpath(0, fn.size()-1));
 391         loader.load(parser);
 392
 393         return 0;
 394 }
 395
 396 /**
 397 Creates targets for all packages and prepares them for building.
 398
 399 @return  0 if everything went ok, -1 if something bad happened and a build
 400          shouldn't be attempted
 401 */
 402 int Builder::create_targets()
 403 {
 404         Target *world=new VirtualTarget(*this, "world");
 405         add_target(world);
 406
 407         Target *def_tgt=new VirtualTarget(*this, "default");
 408         add_target(def_tgt);
 409         world->add_depend(def_tgt);
 410
 411         Target *install=new VirtualTarget(*this, "install");
 412         add_target(install);
 413         world->add_depend(install);
 414
 415         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 416         {
 417                 if(!i->second)
 418                         continue;
 419                 if(!i->second->get_buildable())
 420                         continue;
 421
 422                 Path::Path inst_base;
 423                 if(i->second->get_config().is_option("prefix"))
 424                         inst_base=i->second->get_config().get_option("prefix").value;
 425
 426                 const ComponentList &components=i->second->get_components();
 427                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 428                 {
 429                         // Collect all files belonging to the component
 430                         PathList files;
 431                         const PathList &sources=j->get_sources();
 432                         for(PathList::const_iterator k=sources.begin(); k!=sources.end(); ++k)
 433                         {
 434                                 struct stat st;
 435                                 stat(*k, st);
 436                                 if(S_ISDIR(st.st_mode))
 437                                 {
 438                                         list<string> sfiles=list_files(*k);
 439                                         for(list<string>::iterator l=sfiles.begin(); l!=sfiles.end(); ++l)
 440                                                 files.push_back(*k / *l);
 441                                 }
 442                                 else
 443                                         files.push_back(*k);
 444                         }
 445
 446                         bool build_exe=j->get_type()!=Component::HEADERS;
 447
 448                         list<ObjectFile *> objs;
 449                         for(PathList::iterator k=files.begin(); k!=files.end(); ++k)
 450                         {
 451                                 string basename=(*k)[-1];
 452                                 string ext=Path::splitext(basename).ext;
 453                                 if((ext==".cpp" || ext==".c") && build_exe)
 454                                 {
 455                                         SourceFile *src=new SourceFile(*this, &*j, k->str());
 456                                         add_target(src);
 457
 458                                         // Compile sources
 459                                         ObjectFile *obj=new ObjectFile(*this, *j, *src);
 460                                         add_target(obj);
 461                                         objs.push_back(obj);
 462                                 }
 463                                 else if(ext==".h")
 464                                 {
 465                                         Target *hdr=get_target(k->str());
 466                                         if(!hdr)
 467                                         {
 468                                                 hdr=new Header(*this, &*j, k->str());
 469                                                 add_target(hdr);
 470                                         }
 471
 472                                         // Install headers if requested
 473                                         if(!j->get_install_headers().empty())
 474                                         {
 475                                                 Path::Path inst_path=inst_base/"include"/j->get_install_headers()/basename;
 476                                                 Install *inst=new Install(*this, *i->second, *hdr, inst_path.str());
 477                                                 add_target(inst);
 478                                                 install->add_depend(inst);
 479                                         }
 480                                 }
 481                         }
 482
 483                         if(build_exe)
 484                         {
 485                                 Executable    *exe=0;
 486                                 StaticLibrary *slib=0;
 487                                 if(j->get_type()==Component::LIBRARY)
 488                                 {
 489                                         exe=new SharedLibrary(*this, *j, objs);
 490                                         slib=new StaticLibrary(*this, *j, objs);
 491                                         add_target(slib);
 492                                 }
 493                                 else
 494                                         exe=new Executable(*this, *j, objs);
 495
 496                                 add_target(exe);
 497                                 if(i->second==default_pkg)
 498                                 {
 499                                         def_tgt->add_depend(exe);
 500                                         if(slib) def_tgt->add_depend(slib);
 501                                 }
 502                                 else
 503                                 {
 504                                         world->add_depend(exe);
 505                                         if(slib) world->add_depend(slib);
 506                                 }
 507
 508                                 if(j->get_install())
 509                                 {
 510                                         string inst_dir;
 511                                         if(j->get_type()==Component::PROGRAM)
 512                                                 inst_dir="bin";
 513                                         else if(j->get_type()==Component::LIBRARY)
 514                                                 inst_dir="lib";
 515                                         if(!inst_dir.empty())
 516                                         {
 517                                                 Install *inst=new Install(*this, *i->second, *exe, (inst_base/inst_dir/Path::basename(exe->get_name())).str());
 518                                                 add_target(inst);
 519                                                 install->add_depend(inst);
 520
 521                                                 if(slib)
 522                                                 {
 523                                                         inst=new Install(*this, *i->second, *slib, (inst_base/inst_dir/Path::basename(slib->get_name())).str());
 524                                                         add_target(inst);
 525                                                         install->add_depend(inst);
 526                                                 }
 527                                         }
 528                                 }
 529                         }
 530                 }
 531
 532                 if(i->second->get_install_flags()&(Package::LIB|Package::INCLUDE))
 533                 {
 534                         PkgConfig *pc=new PkgConfig(*this, *i->second);
 535                         add_target(pc);
 536                         Install *inst=new Install(*this, *i->second, *pc, (inst_base/"lib"/"pkgconfig"/Path::basename(pc->get_name())).str());
 537                         add_target(inst);
 538                         install->add_depend(inst);
 539                 }
 540         }
 541
 542         // Find dependencies until no new targets are created
 543         while(!new_tgts.empty())
 544         {
 545                 Target *tgt=new_tgts.front();
 546                 new_tgts.erase(new_tgts.begin());
 547                 tgt->find_depends();
 548                 if(!tgt->get_depends_ready())
 549                         new_tgts.push_back(tgt);
 550         }
 551
 552         // Apply what-ifs
 553         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 554         {
 555                 Target *tgt=get_target((cwd/ *i).str());
 556                 if(!tgt)
 557                 {
 558                         cerr<<"Unknown what-if target "<<*i<<'\n';
 559                         return -1;
 560                 }
 561                 tgt->touch();
 562         }
 563
 564         // Make the cmdline target depend on all targets mentioned on the command line
 565         Target *cmdline=new VirtualTarget(*this, "cmdline");
 566         add_target(cmdline);
 567         world->add_depend(cmdline);
 568         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 569         {
 570                 Target *tgt=get_target(*i);
 571                 if(!tgt)
 572                         tgt=get_target((cwd/ *i).str());
 573                 if(!tgt)
 574                 {
 575                         cerr<<"I don't know anything about "<<*i<<'\n';
 576                         return -1;
 577                 }
 578                 cmdline->add_depend(tgt);
 579         }
 580
 581         world->prepare();
 582
 583         return 0;
 584 }
 585
 586 /**
 587 Check if a header exists, either as a target or a file.  Either an existing
 588 target or a new SystemHeader target will be returned.
 589 */
 590 Target *Builder::get_header(const Msp::Path::Path &fn)
 591 {
 592         Target *tgt=get_target(fn.str());
 593         if(tgt) return tgt;
 594
 595         if(Path::exists(fn))
 596         {
 597                 add_target(tgt=new SystemHeader(*this, fn.str()));
 598                 return tgt;
 599         }
 600         return 0;
 601 }
 602
 603 Target *Builder::get_library(const string &lib, const Path::Path &path, unsigned mode)
 604 {
 605         string full;
 606         if(mode>=1)
 607         {
 608                 full=(path/("lib"+lib+".a")).str();
 609                 Target *tgt=get_target(full);
 610                 // Targets can only be associated with buildable packages (or no package at all)
 611                 if(tgt && (tgt->get_package() || mode==2)) return tgt;
 612         }
 613         if(mode<=1)
 614         {
 615                 full=(path/("lib"+lib+".so")).str();
 616                 Target *tgt=get_target(full);
 617                 if(tgt) return tgt;
 618         }
 619
 620         if(Path::exists(full))
 621         {
 622                 Target *tgt=new SystemLibrary(*this, full);
 623                 add_target(tgt);
 624                 return tgt;
 625         }
 626
 627         return 0;
 628 }
 629
 630 /**
 631 Adds a target to both the target map and the new target queue.
 632 */
 633 void Builder::add_target(Target *t)
 634 {
 635         targets.insert(TargetMap::value_type(t->get_name(), t));
 636         new_tgts.push_back(t);
 637 }
 638
 639 /**
 640 Updates a hash with a string.  This is used from get_header and get_library.
 641 */
 642 void Builder::update_hash(string &hash, const string &value)
 643 {
 644         for(unsigned i=0; i<value.size(); ++i)
 645                 hash[i%hash.size()]^=value[i];
 646 }
 647
 648 /**
 649 This function supervises the build process, starting new actions when slots
 650 become available.
 651 */
 652 int Builder::build()
 653 {
 654         Target *cmdline=get_target("cmdline");
 655
 656         unsigned total=cmdline->count_rebuild();
 657         if(!total)
 658         {
 659                 cout<<"Already up to date\n";
 660                 return 0;
 661         }
 662         cout<<"Will build "<<total<<" target(s)\n";
 663
 664         vector<Action *> actions;
 665
 666         if(chrome)
 667                 cout<<"0 targets built\n";
 668         unsigned count=0;
 669
 670         bool fail=false;
 671         bool finish=false;
 672
 673         while(!finish)
 674         {
 675                 if(actions.size()<jobs && !fail)
 676                 {
 677                         Target *tgt=cmdline->get_buildable_target();
 678                         if(tgt)
 679                         {
 680                                 Action *action=tgt->build();
 681                                 if(action)
 682                                         actions.push_back(action);
 683                         }
 684                         else if(actions.empty())
 685                                 finish=true;
 686                 }
 687                 else
 688                         Time::sleep(10*Time::msec);
 689
 690                 for(unsigned i=0; i<actions.size();)
 691                 {
 692                         int status=actions[i]->check();
 693                         if(status>=0)
 694                         {
 695                                 ++count;
 696                                 if(chrome)
 697                                 {
 698                                         cout<<"\e["<<actions.size()+1<<'A';
 699                                         cout<<count<<" targets built\n";
 700                                         if(i)
 701                                                 cout<<"\e["<<i<<"B";
 702                                         cout<<"\e[M";
 703                                         if(i<actions.size()-1)
 704                                                 cout<<"\e["<<actions.size()-i-1<<"B";
 705                                         cout.flush();
 706                                 }
 707                                 delete actions[i];
 708                                 actions.erase(actions.begin()+i);
 709                                 if(status>0)
 710                                         fail=true;
 711                                 if(actions.empty() && fail)
 712                                         finish=true;
 713                         }
 714                         else
 715                                 ++i;
 716                 }
 717         }
 718
 719         return fail?-1:0;
 720 }
 721
 722 /**
 723 Prints out information about the default package.
 724 */
 725 void Builder::package_help()
 726 {
 727         const Config &config=default_pkg->get_config();
 728         const Config::OptionMap &options=config.get_options();
 729
 730         cout<<"Required packages:\n  ";
 731         const PkgRefList &requires=default_pkg->get_requires();
 732         for(PkgRefList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 733         {
 734                 if(i!=requires.begin())
 735                         cout<<", ";
 736                 cout<<i->get_name();
 737         }
 738         cout<<"\n\n";
 739         cout<<"Package configuration:\n";
 740         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 741         {
 742                 const Config::Option &opt=i->second;
 743                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 744         }
 745 }
 746
 747 Application::RegApp<Builder> Builder::reg;
 748
 749 Builder::Loader::Loader(Builder &b, const Path::Path &s):
 750         bld(b),
 751         src(s)
 752 {
 753         add("package", &Loader::package);
 754 }
 755
 756 void Builder::Loader::package(const string &n)
 757 {
 758         Package *pkg=new Package(bld, n, src);
 759         load_sub(*pkg);
 760         bld.packages.insert(PackageMap::value_type(n, pkg));
 761         bld.new_pkgs.push_back(pkg);
 762 }
 763