source/builder.cpp

   1 #include <fstream>
   2 #include <iostream>
   3 #include <msp/progress.h>
   4 #include <msp/core/error.h>
   5 #include <msp/getopt++/getopt++.h>
   6 #include <msp/parser/parser.h>
   7 #include <msp/path/utils.h>
   8 #include <msp/strings/utils.h>
   9 #include <msp/time/units.h>
  10 #include <msp/time/utils.h>
  11 #include "action.h"
  12 #include "analyzer.h"
  13 #include "builder.h"
  14 #include "executable.h"
  15 #include "header.h"
  16 #include "install.h"
  17 #include "misc.h"
  18 #include "objectfile.h"
  19 #include "package.h"
  20 #include "pkgconfig.h"
  21 #include "sharedlibrary.h"
  22 #include "staticlibrary.h"
  23 #include "systemlibrary.h"
  24 #include "virtualtarget.h"
  25
  26 using namespace std;
  27 using namespace Msp;
  28
  29 Builder::Builder(int argc, char **argv):
  30         analyzer(0),
  31         do_build(false),
  32         verbose(1),
  33         chrome(false),
  34         build_file("Build"),
  35         jobs(1)
  36 {
  37         string   analyze_mode;
  38         string   work_dir;
  39         bool     full_paths=false;
  40         unsigned max_depth=5;
  41
  42         GetOpt getopt;
  43         getopt.add_option('a', "analyze",    analyze_mode, GetOpt::REQUIRED_ARG);
  44         getopt.add_option('b', "build",      do_build,     GetOpt::NO_ARG);
  45 //      getopt.add_option('c', "clean",      clean,        GetOpt::NO_ARG);
  46         getopt.add_option('f', "file",       build_file,   GetOpt::REQUIRED_ARG);
  47         getopt.add_option('h', "help",       help,         GetOpt::NO_ARG);
  48         getopt.add_option('j', "jobs",       jobs,         GetOpt::REQUIRED_ARG);
  49         getopt.add_option('n', "dry-run",    dry_run,      GetOpt::NO_ARG);
  50         getopt.add_option('v', "verbose",    verbose,      GetOpt::NO_ARG);
  51         getopt.add_option('A', "conf-all",   conf_all,     GetOpt::NO_ARG);
  52         getopt.add_option('B', "build-all",  build_all,    GetOpt::NO_ARG);
  53         getopt.add_option('C', "chdir",      work_dir,     GetOpt::REQUIRED_ARG);
  54         getopt.add_option('W', "what-if",    what_if,      GetOpt::REQUIRED_ARG);
  55         getopt.add_option(     "chrome",     chrome,       GetOpt::NO_ARG);
  56         getopt.add_option(     "conf-only",  conf_only,    GetOpt::NO_ARG);
  57         getopt.add_option(     "full-paths", full_paths,   GetOpt::NO_ARG);
  58         getopt.add_option(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  59         getopt(argc, argv);
  60
  61         if(!analyze_mode.empty())
  62         {
  63                 analyzer=new Analyzer(*this);
  64
  65                 if(analyze_mode=="deps")
  66                         analyzer->set_mode(Analyzer::DEPS);
  67                 else if(analyze_mode=="alldeps")
  68                         analyzer->set_mode(Analyzer::ALLDEPS);
  69                 else if(analyze_mode=="rebuild")
  70                         analyzer->set_mode(Analyzer::REBUILD);
  71                 else if(analyze_mode=="rdeps")
  72                         analyzer->set_mode(Analyzer::RDEPS);
  73                 else
  74                         throw UsageError("Invalid analyze mode");
  75
  76                 analyzer->set_max_depth(max_depth);
  77                 analyzer->set_full_paths(full_paths);
  78         }
  79         else
  80                 do_build=true;
  81
  82         const list<string> &args=getopt.get_args();
  83         for(list<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
  84         {
  85                 unsigned equal=i->find('=');
  86                 if(equal!=string::npos)
  87                         cmdline_options.insert(RawOptionMap::value_type(i->substr(0, equal), i->substr(equal+1)));
  88                 else
  89                         cmdline_targets.push_back(*i);
  90         }
  91
  92         if(cmdline_targets.empty())
  93                 cmdline_targets.push_back("default");
  94
  95         if(!work_dir.empty())
  96                 chdir(work_dir.c_str());
  97
  98         cwd=Path::getcwd();
  99
 100         archs.insert(StringMap::value_type("native", ""));
 101         archs.insert(StringMap::value_type("arm", "arm-linux-gnu-"));
 102         archs.insert(StringMap::value_type("win32", "i586-mingw32msvc-"));
 103 }
 104
 105 /**
 106 Gets a package with the specified name, possibly creating it.
 107
 108 @param   n  Package name
 109
 110 @return  Pointer to the package, or 0 if the package could not be located
 111 */
 112 Package *Builder::get_package(const string &n)
 113 {
 114         PackageMap::iterator i=packages.find(n);
 115         if(i!=packages.end())
 116                 return i->second;
 117
 118         // Try to get source directory with pkgconfig
 119         list<string> argv;
 120         argv.push_back("pkg-config");
 121         argv.push_back("--variable=source");
 122         argv.push_back(n);
 123         string srcdir=strip(run_command(argv));
 124
 125         PathList dirs;
 126         if(!srcdir.empty())
 127                 dirs.push_back(srcdir);
 128
 129         // Make some other guesses about the source directory
 130         string dirname=n;
 131         if(!dirname.compare(0, 3, "msp"))
 132                 dirname.erase(0, 3);
 133         dirs.push_back(cwd/dirname);
 134         dirs.push_back(cwd/".."/dirname);
 135
 136         // Go through the candidate directories and look for a Build file
 137         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 138                 if(!load_build_file(*j/"Build"))
 139                 {
 140                         i=packages.find(n);
 141                         if(i!=packages.end())
 142                                 return i->second;
 143                         break;
 144                 }
 145
 146         // Package source not found - create a binary package
 147         Package *pkg=Package::create(*this, n);
 148         packages.insert(PackageMap::value_type(n, pkg));
 149         if(pkg)
 150                 new_pkgs.push_back(pkg);
 151
 152         return pkg;
 153 }
 154
 155 /**
 156 Returns the target with the given name, or 0 if no such target exists.
 157 */
 158 Target *Builder::get_target(const string &n)
 159 {
 160         TargetMap::iterator i=targets.find(n);
 161         if(i!=targets.end())
 162                 return i->second;
 163         return 0;
 164 }
 165
 166 /**
 167 Tries to locate a header included from a given location and with a given include
 168 path.  Considers known targets as well as existing files.  If a matching target
 169 is not found but a file exists, a new SystemHeader target will be created and
 170 returned.
 171 */
 172 Target *Builder::get_header(const string &include, const string &from, const list<string> &path)
 173 {
 174         string hash(8, 0);
 175         update_hash(hash, from);
 176         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 177                 update_hash(hash, *i);
 178
 179         string id=hash+include;
 180         TargetMap::iterator i=includes.find(id);
 181         if(i!=includes.end())
 182                 return i->second;
 183
 184         string fn=include.substr(1);
 185         Target *tgt=0;
 186         if(include[0]=='"' && (tgt=get_header(Path::Path(from)/fn)))
 187                 ;
 188         else if((tgt=get_header(Path::Path("/usr/include")/fn)))
 189                 ;
 190         //XXX Determine the C++ header location dynamically
 191         else if((tgt=get_header(Path::Path("/usr/include/c++/4.1.2")/fn)))
 192                 ;
 193         else
 194         {
 195                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 196                         tgt=get_header(cwd/ *j/fn);
 197         }
 198
 199         includes.insert(TargetMap::value_type(id, tgt));
 200
 201         return tgt;
 202 }
 203
 204 /**
 205 Tries to locate a library with the given library path.  Considers known targets
 206 as well as existing files.  If a matching target is not found but a file exists,
 207 a new SystemLibrary target will be created and returned.
 208
 209 @param   lib   Name of the library to get (without "lib" prefix or extension)
 210 @param   path  List of paths to search for the library
 211 @param   mode  Shared / static mode
 212
 213 @return  Some kind of library target, if a match was found
 214 */
 215 Target *Builder::get_library(const string &lib, const list<string> &path, LibMode mode)
 216 {
 217         string hash(8, 0);
 218         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 219                 update_hash(hash, *i);
 220
 221         //XXX Incorporate mode into id
 222         string id=hash+lib;
 223         TargetMap::iterator i=libraries.find(id);
 224         if(i!=libraries.end())
 225                 return i->second;
 226
 227         Target *tgt=0;
 228         if((tgt=get_library(lib, "/lib", mode)))
 229                 ;
 230         else if((tgt=get_library(lib, "/usr/lib", mode)))
 231                 ;
 232         else
 233         {
 234                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 235                         tgt=get_library(lib, cwd/ *j, mode);
 236         }
 237
 238         libraries.insert(TargetMap::value_type(id, tgt));
 239
 240         return tgt;
 241 }
 242
 243 const string &Builder::get_arch_prefix(const string &arch) const
 244 {
 245         StringMap::const_iterator i=archs.find(arch);
 246         if(i==archs.end())
 247                 throw InvalidParameterValue("Unknown architecture");
 248
 249         return i->second;
 250 }
 251
 252 int Builder::main()
 253 {
 254         if(load_build_file(cwd/build_file))
 255         {
 256                 cerr<<"No build info here.\n";
 257                 return 1;
 258         }
 259
 260         default_pkg=packages.begin()->second;
 261
 262         while(!new_pkgs.empty())
 263         {
 264                 Package *pkg=new_pkgs.front();
 265                 new_pkgs.erase(new_pkgs.begin());
 266                 pkg->resolve_refs();
 267         }
 268
 269         default_pkg->configure(cmdline_options, conf_all?2:1);
 270
 271         if(help)
 272         {
 273                 usage(0, "builder", false);
 274                 cout<<'\n';
 275                 package_help();
 276                 return 0;
 277         }
 278
 279         StringMap problems;
 280         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 281         {
 282                 string prob;
 283                 if(!i->second)
 284                         prob="missing";
 285                 else if(i->second->get_buildable() && i->second->get_arch()!=default_pkg->get_arch())
 286                         prob="wrong architecture ("+i->second->get_arch()+")";
 287                 if(!prob.empty())
 288                         problems.insert(StringMap::value_type(i->first, prob));
 289         }
 290
 291         if(!problems.empty())
 292         {
 293                 cerr<<"The following problems were detected:\n";
 294                 for(StringMap::iterator i=problems.begin(); i!=problems.end(); ++i)
 295                         cerr<<"  "<<i->first<<": "<<i->second<<'\n';
 296                 cerr<<"Please fix them and try again.\n";
 297                 return 1;
 298         }
 299
 300         if(conf_only)
 301                 return 0;
 302
 303         if(create_targets())
 304                 return 1;
 305
 306         cout<<packages.size()<<" packages, "<<targets.size()<<" targets\n";
 307         if(verbose>=2)
 308         {
 309                 for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 310                 {
 311                         cout<<' '<<i->second->get_name();
 312                         if(i->second->get_buildable())
 313                                 cout<<'*';
 314                         unsigned count=0;
 315                         unsigned ood_count=0;
 316                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 317                                 if(j->second->get_package()==i->second)
 318                                 {
 319                                         ++count;
 320                                         if(j->second->get_rebuild())
 321                                                 ++ood_count;
 322                                 }
 323                         if(count)
 324                         {
 325                                 cout<<" ("<<count<<" targets";
 326                                 if(ood_count)
 327                                         cout<<", "<<ood_count<<" out-of-date";
 328                                 cout<<')';
 329                         }
 330                         cout<<'\n';
 331                 }
 332         }
 333
 334         if(analyzer)
 335                 analyzer->analyze();
 336
 337         if(do_build)
 338                 build();
 339
 340         return exit_code;
 341 }
 342
 343 Builder::~Builder()
 344 {
 345         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 346                 delete i->second;
 347         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 348                 delete i->second;
 349         delete analyzer;
 350 }
 351
 352 void Builder::usage(const char *reason, const char *argv0, bool brief)
 353 {
 354         if(reason)
 355                 cerr<<reason<<'\n';
 356
 357         if(brief)
 358                 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> ...]";
 359         else
 360         {
 361                 cerr<<
 362                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 363                         "\n"
 364                         "Options:\n"
 365                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 366                         "  -b, --build         Perform build even if doing analysis.\n"
 367                         "  -c, --clean         Clean buildable targets.\n"
 368                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 369                         "  -h, --help          Print this message.\n"
 370                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 371                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 372                         "  -v, --verbose       Print more information about what's going on.\n"
 373                         "  -A, --conf-all      Apply configuration to all packages.\n"
 374                         "  -B, --build-all     Build all targets unconditionally.\n"
 375                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 376                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 377                         "  --chrome            Use extra chrome to print status.\n"
 378                         "  --conf-only         Stop after configuring packages.\n"
 379                         "  --full-paths        Output full paths in analysis.\n"
 380                         "  --max-depth NUM     Maximum depth to show in analysis.\n";
 381         }
 382 }
 383
 384 /**
 385 Loads the given build file.
 386
 387 @param   fn  Path to the file
 388
 389 @return  0 on success, -1 if the file could not be opened
 390 */
 391 int Builder::load_build_file(const Path::Path &fn)
 392 {
 393         ifstream in(fn.str().c_str());
 394         if(!in)
 395                 return -1;
 396
 397         Parser::Parser parser(in, fn.str());
 398         Loader loader(*this, fn.subpath(0, fn.size()-1));
 399         loader.load(parser);
 400
 401         return 0;
 402 }
 403
 404 /**
 405 Creates targets for all packages and prepares them for building.
 406
 407 @return  0 if everything went ok, -1 if something bad happened and a build
 408          shouldn't be attempted
 409 */
 410 int Builder::create_targets()
 411 {
 412         Target *world=new VirtualTarget(*this, "world");
 413         add_target(world);
 414
 415         Target *def_tgt=new VirtualTarget(*this, "default");
 416         add_target(def_tgt);
 417         world->add_depend(def_tgt);
 418
 419         Target *install=new VirtualTarget(*this, "install");
 420         add_target(install);
 421         world->add_depend(install);
 422
 423         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 424         {
 425                 if(!i->second)
 426                         continue;
 427                 if(!i->second->get_buildable())
 428                         continue;
 429
 430                 Path::Path inst_base;
 431                 if(i->second->get_buildable() && i->second->get_install_flags())
 432                         inst_base=i->second->get_prefix();
 433
 434                 const ComponentList &components=i->second->get_components();
 435                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 436                 {
 437                         // Collect all files belonging to the component
 438                         PathList files;
 439                         const PathList &sources=j->get_sources();
 440                         for(PathList::const_iterator k=sources.begin(); k!=sources.end(); ++k)
 441                         {
 442                                 struct stat st;
 443                                 stat(*k, st);
 444                                 if(S_ISDIR(st.st_mode))
 445                                 {
 446                                         list<string> sfiles=list_files(*k);
 447                                         for(list<string>::iterator l=sfiles.begin(); l!=sfiles.end(); ++l)
 448                                                 files.push_back(*k / *l);
 449                                 }
 450                                 else
 451                                         files.push_back(*k);
 452                         }
 453
 454                         bool build_exe=j->get_type()!=Component::HEADERS;
 455
 456                         list<ObjectFile *> objs;
 457                         for(PathList::iterator k=files.begin(); k!=files.end(); ++k)
 458                         {
 459                                 string basename=(*k)[-1];
 460                                 string ext=Path::splitext(basename).ext;
 461                                 if((ext==".cpp" || ext==".c") && build_exe)
 462                                 {
 463                                         SourceFile *src=new SourceFile(*this, &*j, k->str());
 464                                         add_target(src);
 465
 466                                         // Compile sources
 467                                         ObjectFile *obj=new ObjectFile(*this, *j, *src);
 468                                         add_target(obj);
 469                                         objs.push_back(obj);
 470                                 }
 471                                 else if(ext==".h")
 472                                 {
 473                                         Target *hdr=get_target(k->str());
 474                                         if(!hdr)
 475                                         {
 476                                                 hdr=new Header(*this, &*j, k->str());
 477                                                 add_target(hdr);
 478                                         }
 479
 480                                         // Install headers if requested
 481                                         if(!j->get_install_headers().empty())
 482                                         {
 483                                                 Path::Path inst_path=inst_base/"include"/j->get_install_headers()/basename;
 484                                                 Install *inst=new Install(*this, *i->second, *hdr, inst_path.str());
 485                                                 add_target(inst);
 486                                                 install->add_depend(inst);
 487                                         }
 488                                 }
 489                         }
 490
 491                         if(build_exe)
 492                         {
 493                                 Executable    *exe=0;
 494                                 StaticLibrary *slib=0;
 495                                 if(j->get_type()==Component::LIBRARY)
 496                                 {
 497                                         exe=new SharedLibrary(*this, *j, objs);
 498                                         slib=new StaticLibrary(*this, *j, objs);
 499                                         add_target(slib);
 500                                 }
 501                                 else
 502                                         exe=new Executable(*this, *j, objs);
 503
 504                                 add_target(exe);
 505                                 if(i->second==default_pkg)
 506                                 {
 507                                         def_tgt->add_depend(exe);
 508                                         if(slib) def_tgt->add_depend(slib);
 509                                 }
 510                                 else
 511                                 {
 512                                         world->add_depend(exe);
 513                                         if(slib) world->add_depend(slib);
 514                                 }
 515
 516                                 if(j->get_install())
 517                                 {
 518                                         string inst_dir;
 519                                         if(j->get_type()==Component::PROGRAM)
 520                                                 inst_dir="bin";
 521                                         else if(j->get_type()==Component::LIBRARY)
 522                                                 inst_dir="lib";
 523                                         if(!inst_dir.empty())
 524                                         {
 525                                                 Install *inst=new Install(*this, *i->second, *exe, (inst_base/inst_dir/Path::basename(exe->get_name())).str());
 526                                                 add_target(inst);
 527                                                 install->add_depend(inst);
 528
 529                                                 if(slib)
 530                                                 {
 531                                                         inst=new Install(*this, *i->second, *slib, (inst_base/inst_dir/Path::basename(slib->get_name())).str());
 532                                                         add_target(inst);
 533                                                         install->add_depend(inst);
 534                                                 }
 535                                         }
 536                                 }
 537                         }
 538                 }
 539
 540                 if(i->second->get_install_flags()&(Package::LIB|Package::INCLUDE))
 541                 {
 542                         PkgConfig *pc=new PkgConfig(*this, *i->second);
 543                         add_target(pc);
 544                         Install *inst=new Install(*this, *i->second, *pc, (inst_base/"lib"/"pkgconfig"/Path::basename(pc->get_name())).str());
 545                         add_target(inst);
 546                         install->add_depend(inst);
 547                 }
 548         }
 549
 550         // Find dependencies until no new targets are created
 551         while(!new_tgts.empty())
 552         {
 553                 Target *tgt=new_tgts.front();
 554                 new_tgts.erase(new_tgts.begin());
 555                 tgt->find_depends();
 556                 if(!tgt->get_depends_ready())
 557                         new_tgts.push_back(tgt);
 558         }
 559
 560         // Apply what-ifs
 561         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 562         {
 563                 Target *tgt=get_target((cwd/ *i).str());
 564                 if(!tgt)
 565                 {
 566                         cerr<<"Unknown what-if target "<<*i<<'\n';
 567                         return -1;
 568                 }
 569                 tgt->touch();
 570         }
 571
 572         // Make the cmdline target depend on all targets mentioned on the command line
 573         Target *cmdline=new VirtualTarget(*this, "cmdline");
 574         add_target(cmdline);
 575         world->add_depend(cmdline);
 576         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 577         {
 578                 Target *tgt=get_target(*i);
 579                 if(!tgt)
 580                         tgt=get_target((cwd/ *i).str());
 581                 if(!tgt)
 582                 {
 583                         cerr<<"I don't know anything about "<<*i<<'\n';
 584                         return -1;
 585                 }
 586                 cmdline->add_depend(tgt);
 587         }
 588
 589         world->prepare();
 590
 591         return 0;
 592 }
 593
 594 /**
 595 Check if a header exists, either as a target or a file.  Either an existing
 596 target or a new SystemHeader target will be returned.
 597 */
 598 Target *Builder::get_header(const Msp::Path::Path &fn)
 599 {
 600         Target *tgt=get_target(fn.str());
 601         if(tgt) return tgt;
 602
 603         if(Path::exists(fn))
 604         {
 605                 add_target(tgt=new SystemHeader(*this, fn.str()));
 606                 return tgt;
 607         }
 608         return 0;
 609 }
 610
 611 Target *Builder::get_library(const string &lib, const Path::Path &path, LibMode mode)
 612 {
 613         string full;
 614         if(mode!=DYNAMIC)
 615         {
 616                 full=(path/("lib"+lib+".a")).str();
 617                 Target *tgt=get_target(full);
 618                 // Targets can only be associated with buildable packages (or no package at all)
 619                 if(tgt && (tgt->get_package() || mode==ALL_STATIC)) return tgt;
 620         }
 621         if(mode!=ALL_STATIC)
 622         {
 623                 full=(path/("lib"+lib+".so")).str();
 624                 Target *tgt=get_target(full);
 625                 if(tgt) return tgt;
 626         }
 627
 628         if(Path::exists(full))
 629         {
 630                 Target *tgt=new SystemLibrary(*this, full);
 631                 add_target(tgt);
 632                 return tgt;
 633         }
 634
 635         return 0;
 636 }
 637
 638 /**
 639 Adds a target to both the target map and the new target queue.
 640 */
 641 void Builder::add_target(Target *t)
 642 {
 643         targets.insert(TargetMap::value_type(t->get_name(), t));
 644         new_tgts.push_back(t);
 645 }
 646
 647 /**
 648 Updates a hash with a string.  This is used from get_header and get_library.
 649 */
 650 void Builder::update_hash(string &hash, const string &value)
 651 {
 652         for(unsigned i=0; i<value.size(); ++i)
 653                 hash[i%hash.size()]^=value[i];
 654 }
 655
 656 /**
 657 This function supervises the build process, starting new actions when slots
 658 become available.
 659 */
 660 int Builder::build()
 661 {
 662         Target *cmdline=get_target("cmdline");
 663
 664         unsigned total=cmdline->count_rebuild();
 665         if(!total)
 666         {
 667                 cout<<"Already up to date\n";
 668                 return 0;
 669         }
 670         cout<<"Will build "<<total<<" target(s)\n";
 671
 672         vector<Action *> actions;
 673
 674         if(chrome)
 675                 cout<<"0 targets built\n";
 676         unsigned count=0;
 677
 678         bool fail=false;
 679         bool finish=false;
 680
 681         while(!finish)
 682         {
 683                 if(actions.size()<jobs && !fail)
 684                 {
 685                         Target *tgt=cmdline->get_buildable_target();
 686                         if(tgt)
 687                         {
 688                                 Action *action=tgt->build();
 689                                 if(action)
 690                                         actions.push_back(action);
 691                         }
 692                         else if(actions.empty())
 693                                 finish=true;
 694                 }
 695                 else
 696                         Time::sleep(10*Time::msec);
 697
 698                 for(unsigned i=0; i<actions.size();)
 699                 {
 700                         int status=actions[i]->check();
 701                         if(status>=0)
 702                         {
 703                                 ++count;
 704                                 if(chrome)
 705                                 {
 706                                         cout<<"\e["<<actions.size()+1<<'A';
 707                                         cout<<count<<" targets built\n";
 708                                         if(i)
 709                                                 cout<<"\e["<<i<<"B";
 710                                         cout<<"\e[M";
 711                                         if(i<actions.size()-1)
 712                                                 cout<<"\e["<<actions.size()-i-1<<"B";
 713                                         cout.flush();
 714                                 }
 715                                 delete actions[i];
 716                                 actions.erase(actions.begin()+i);
 717                                 if(status>0)
 718                                         fail=true;
 719                                 if(actions.empty() && fail)
 720                                         finish=true;
 721                         }
 722                         else
 723                                 ++i;
 724                 }
 725         }
 726
 727         if(fail)
 728                 cout<<"Build failed\n";
 729
 730         return fail?-1:0;
 731 }
 732
 733 /**
 734 Prints out information about the default package.
 735 */
 736 void Builder::package_help()
 737 {
 738         const Config &config=default_pkg->get_config();
 739         const Config::OptionMap &options=config.get_options();
 740
 741         cout<<"Required packages:\n  ";
 742         const PkgRefList &requires=default_pkg->get_requires();
 743         for(PkgRefList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 744         {
 745                 if(i!=requires.begin())
 746                         cout<<", ";
 747                 cout<<i->get_name();
 748         }
 749         cout<<"\n\n";
 750         cout<<"Package configuration:\n";
 751         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 752         {
 753                 const Config::Option &opt=i->second;
 754                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 755         }
 756 }
 757
 758 Application::RegApp<Builder> Builder::reg;
 759
 760 Builder::Loader::Loader(Builder &b, const Path::Path &s):
 761         bld(b),
 762         src(s)
 763 {
 764         add("package", &Loader::package);
 765 }
 766
 767 void Builder::Loader::package(const string &n)
 768 {
 769         Package *pkg=new Package(bld, n, src);
 770         load_sub(*pkg);
 771         bld.packages.insert(PackageMap::value_type(n, pkg));
 772         bld.new_pkgs.push_back(pkg);
 773 }
 774