source/builder.cpp

   1 #include <fstream>
   2 #include <iostream>
   3 #include <set>
   4 #include <msp/core/error.h>
   5 #include <msp/core/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 "header.h"
  15 #include "install.h"
  16 #include "misc.h"
  17 #include "package.h"
  18 #include "pkgconfig.h"
  19 #include "sharedlibrary.h"
  20 #include "systemlibrary.h"
  21 #include "unlink.h"
  22 #include "virtualtarget.h"
  23
  24 using namespace std;
  25 using namespace Msp;
  26
  27 Builder::Builder(int argc, char **argv):
  28         analyzer(0),
  29         build(false),
  30         clean(0),
  31         dry_run(false),
  32         help(false),
  33         verbose(1),
  34         chrome(false),
  35         build_file("Build"),
  36         jobs(1),
  37         conf_all(false),
  38         conf_only(false),
  39         build_all(false),
  40         create_makefile(false)
  41 {
  42         string   analyze_mode;
  43         string   work_dir;
  44         bool     full_paths=false;
  45         unsigned max_depth=5;
  46
  47         GetOpt getopt;
  48         getopt.add_option('a', "analyze",    analyze_mode, GetOpt::REQUIRED_ARG);
  49         getopt.add_option('b', "build",      build,        GetOpt::NO_ARG);
  50         getopt.add_option('c', "clean",      clean,        GetOpt::NO_ARG);
  51         getopt.add_option('f', "file",       build_file,   GetOpt::REQUIRED_ARG);
  52         getopt.add_option('h', "help",       help,         GetOpt::NO_ARG);
  53         getopt.add_option('j', "jobs",       jobs,         GetOpt::REQUIRED_ARG);
  54         getopt.add_option('n', "dry-run",    dry_run,      GetOpt::NO_ARG);
  55         getopt.add_option('v', "verbose",    verbose,      GetOpt::NO_ARG);
  56         getopt.add_option('A', "conf-all",   conf_all,     GetOpt::NO_ARG);
  57         getopt.add_option('B', "build-all",  build_all,    GetOpt::NO_ARG);
  58         getopt.add_option('C', "chdir",      work_dir,     GetOpt::REQUIRED_ARG);
  59         getopt.add_option('W', "what-if",    what_if,      GetOpt::REQUIRED_ARG);
  60         getopt.add_option(     "chrome",     chrome,       GetOpt::NO_ARG);
  61         getopt.add_option(     "conf-only",  conf_only,    GetOpt::NO_ARG);
  62         getopt.add_option(     "full-paths", full_paths,   GetOpt::NO_ARG);
  63         //getopt.add_option(     "makefile",   create_makefile, GetOpt::NO_ARG);
  64         getopt.add_option(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  65         getopt(argc, argv);
  66
  67         if(!analyze_mode.empty())
  68         {
  69                 analyzer=new Analyzer(*this);
  70
  71                 if(analyze_mode=="deps")
  72                         analyzer->set_mode(Analyzer::DEPS);
  73                 else if(analyze_mode=="alldeps")
  74                         analyzer->set_mode(Analyzer::ALLDEPS);
  75                 else if(analyze_mode=="rebuild")
  76                         analyzer->set_mode(Analyzer::REBUILD);
  77                 else if(analyze_mode=="rdeps")
  78                         analyzer->set_mode(Analyzer::RDEPS);
  79                 else
  80                         throw UsageError("Invalid analyze mode");
  81
  82                 analyzer->set_max_depth(max_depth);
  83                 analyzer->set_full_paths(full_paths);
  84         }
  85         else if(!clean && !create_makefile)
  86                 build=true;
  87
  88         const list<string> &args=getopt.get_args();
  89         for(list<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
  90         {
  91                 unsigned equal=i->find('=');
  92                 if(equal!=string::npos)
  93                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
  94                 else
  95                         cmdline_targets.push_back(*i);
  96         }
  97
  98         if(cmdline_targets.empty())
  99                 cmdline_targets.push_back("default");
 100
 101         if(!work_dir.empty())
 102                 chdir(work_dir.c_str());
 103
 104         cwd=Path::getcwd();
 105
 106         archs.insert(StringMap::value_type("native", ""));
 107         archs.insert(StringMap::value_type("arm", "arm-linux-gnu"));
 108         archs.insert(StringMap::value_type("win32", "i586-mingw32msvc"));
 109
 110         StringMap &native_tools=tools.insert(ToolMap::value_type("native", StringMap())).first->second;
 111         native_tools.insert(StringMap::value_type("CC",   "gcc"));
 112         native_tools.insert(StringMap::value_type("CXX",  "g++"));
 113         native_tools.insert(StringMap::value_type("LD",   "gcc"));
 114         native_tools.insert(StringMap::value_type("LDXX", "g++"));
 115         native_tools.insert(StringMap::value_type("AR",   "ar"));
 116
 117         StringMap &release_profile=profile_tmpl.insert(ProfileTemplateMap::value_type("release", StringMap())).first->second;
 118         release_profile.insert(StringMap::value_type("optimize", "3"));
 119         release_profile.insert(StringMap::value_type("outdir",   "$profile"));
 120
 121         StringMap &debug_profile=profile_tmpl.insert(ProfileTemplateMap::value_type("debug", StringMap())).first->second;
 122         debug_profile.insert(StringMap::value_type("debug",  "1"));
 123         debug_profile.insert(StringMap::value_type("outdir", "$profile"));
 124
 125         for(StringMap::iterator i=archs.begin(); i!=archs.end(); ++i)
 126         {
 127                 if(i->first=="native")
 128                         continue;
 129
 130                 StringMap &arch_profile=profile_tmpl.insert(ProfileTemplateMap::value_type(i->first, StringMap())).first->second;
 131                 arch_profile.insert(StringMap::value_type("arch",   i->first));
 132                 arch_profile.insert(StringMap::value_type("prefix", "$HOME/local/$arch"));
 133                 arch_profile.insert(StringMap::value_type("outdir", "$profile"));
 134         }
 135 }
 136
 137 /**
 138 Gets a package with the specified name, possibly creating it.
 139
 140 @param   n  Package name
 141
 142 @return  Pointer to the package, or 0 if the package could not be located
 143 */
 144 Package *Builder::get_package(const string &n)
 145 {
 146         PackageMap::iterator i=packages.find(n);
 147         if(i!=packages.end())
 148                 return i->second;
 149
 150         // Try to get source directory with pkgconfig
 151         list<string> argv;
 152         argv.push_back("pkg-config");
 153         argv.push_back("--variable=source");
 154         argv.push_back(n);
 155         string srcdir=strip(run_command(argv));
 156
 157         PathList dirs;
 158         if(!srcdir.empty())
 159                 dirs.push_back(srcdir);
 160
 161         // Make some other guesses about the source directory
 162         string dirname=n;
 163         if(!dirname.compare(0, 3, "msp"))
 164                 dirname.erase(0, 3);
 165         dirs.push_back(cwd/dirname);
 166         dirs.push_back(cwd/".."/dirname);
 167
 168         // Go through the candidate directories and look for a Build file
 169         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 170                 if(!load_build_file(*j/"Build"))
 171                 {
 172                         i=packages.find(n);
 173                         if(i!=packages.end())
 174                                 return i->second;
 175                         break;
 176                 }
 177
 178         // Package source not found - create a binary package
 179         Package *pkg=Package::create(*this, n);
 180         packages.insert(PackageMap::value_type(n, pkg));
 181         if(pkg)
 182                 new_pkgs.push_back(pkg);
 183
 184         return pkg;
 185 }
 186
 187 /**
 188 Returns the target with the given name, or 0 if no such target exists.
 189 */
 190 Target *Builder::get_target(const string &n) const
 191 {
 192         TargetMap::const_iterator i=targets.find(n);
 193         if(i!=targets.end())
 194                 return i->second;
 195         return 0;
 196 }
 197
 198 /**
 199 Tries to locate a header included from a given location and with a given include
 200 path.  Considers known targets as well as existing files.  If a matching target
 201 is not found but a file exists, a new SystemHeader target will be created and
 202 returned.
 203 */
 204 Target *Builder::get_header(const string &include, const string &, const string &from, const list<string> &path)
 205 {
 206         string hash(8, 0);
 207         update_hash(hash, from);
 208         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 209                 update_hash(hash, *i);
 210
 211         string id=hash+include;
 212         TargetMap::iterator i=includes.find(id);
 213         if(i!=includes.end())
 214                 return i->second;
 215
 216         string fn=include.substr(1);
 217         Target *tgt=0;
 218         if(include[0]=='"' && (tgt=get_header(Path::Path(from)/fn)))
 219                 ;
 220         else if((tgt=get_header(Path::Path("/usr/include")/fn)))
 221                 ;
 222         //XXX Determine the C++ header location dynamically
 223         else if((tgt=get_header(Path::Path("/usr/include/c++/4.1.2")/fn)))
 224                 ;
 225         else
 226         {
 227                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 228                         tgt=get_header(cwd/ *j/fn);
 229         }
 230
 231         includes.insert(TargetMap::value_type(id, tgt));
 232
 233         return tgt;
 234 }
 235
 236 /**
 237 Tries to locate a library with the given library path.  Considers known targets
 238 as well as existing files.  If a matching target is not found but a file exists,
 239 a new SystemLibrary target will be created and returned.
 240
 241 @param   lib   Name of the library to get (without "lib" prefix or extension)
 242 @param   path  List of paths to search for the library
 243 @param   mode  Shared / static mode
 244
 245 @return  Some kind of library target, if a match was found
 246 */
 247 Target *Builder::get_library(const string &lib, const string &arch, const list<string> &path, LibMode mode)
 248 {
 249         string hash(8, 0);
 250         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 251                 update_hash(hash, *i);
 252
 253         //XXX Incorporate mode into id
 254         string id=hash+lib;
 255         TargetMap::iterator i=libraries.find(id);
 256         if(i!=libraries.end())
 257                 return i->second;
 258
 259         StringList syspath;
 260         if(arch=="native")
 261         {
 262                 syspath.push_back("/lib");
 263                 syspath.push_back("/usr/lib");
 264         }
 265         else
 266                 syspath.push_back("/usr/"+get_arch_prefix(arch)+"/lib");
 267
 268         Target *tgt=0;
 269         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 270                 tgt=get_library(lib, arch, *j, mode);
 271         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 272                 tgt=get_library(lib, arch, cwd/ *j, mode);
 273
 274         libraries.insert(TargetMap::value_type(id, tgt));
 275
 276         return tgt;
 277 }
 278
 279 const string &Builder::get_arch_prefix(const string &arch) const
 280 {
 281         StringMap::const_iterator i=archs.find(arch);
 282         if(i==archs.end())
 283                 throw InvalidParameterValue("Unknown architecture");
 284
 285         return i->second;
 286 }
 287
 288 string Builder::get_tool(const std::string &tool, const std::string &arch)
 289 {
 290         ToolMap::iterator i=tools.find(arch);
 291         if(i!=tools.end())
 292         {
 293                 StringMap::iterator j=i->second.find(tool);
 294                 if(j!=i->second.end())
 295                         return j->second;
 296         }
 297
 298         // Either the arch, or the tool within the arch was not found
 299         i=tools.find("native");
 300         StringMap::iterator j=i->second.find(tool);
 301         if(j==i->second.end())
 302                 throw InvalidParameterValue("Unknown tool");
 303
 304         return get_arch_prefix(arch)+"-"+j->second;
 305 }
 306
 307 void Builder::apply_profile_template(Config &config, const string &pt) const
 308 {
 309         vector<string> parts=split(pt, '-');
 310
 311         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 312         {
 313                 ProfileTemplateMap::const_iterator j=profile_tmpl.find(*i);
 314                 if(j==profile_tmpl.end())
 315                         continue;
 316
 317                 config.update(j->second);
 318         }
 319 }
 320
 321 /**
 322 Adds a target to both the target map and the new target queue.  Called from
 323 Target constructor.
 324 */
 325 void Builder::add_target(Target *t)
 326 {
 327         targets.insert(TargetMap::value_type(t->get_name(), t));
 328         new_tgts.push_back(t);
 329 }
 330
 331 int Builder::main()
 332 {
 333         if(load_build_file(cwd/build_file))
 334         {
 335                 cerr<<"No build info here.\n";
 336                 return 1;
 337         }
 338
 339         default_pkg=packages.begin()->second;
 340
 341         while(!new_pkgs.empty())
 342         {
 343                 Package *pkg=new_pkgs.front();
 344                 new_pkgs.erase(new_pkgs.begin());
 345                 pkg->resolve_refs();
 346         }
 347
 348         default_pkg->configure(cmdline_options, conf_all?2:1);
 349
 350         if(help)
 351         {
 352                 usage(0, "builder", false);
 353                 cout<<'\n';
 354                 package_help();
 355                 return 0;
 356         }
 357
 358         StringMap problems;
 359         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 360         {
 361                 string prob;
 362                 if(!i->second)
 363                         prob="missing";
 364                 else if(i->second->get_buildable() && i->second->get_arch()!=default_pkg->get_arch())
 365                         prob="wrong architecture ("+i->second->get_arch()+")";
 366                 if(!prob.empty())
 367                         problems.insert(StringMap::value_type(i->first, prob));
 368         }
 369
 370         if(!problems.empty())
 371         {
 372                 cerr<<"The following problems were detected:\n";
 373                 for(StringMap::iterator i=problems.begin(); i!=problems.end(); ++i)
 374                         cerr<<"  "<<i->first<<": "<<i->second<<'\n';
 375                 cerr<<"Please fix them and try again.\n";
 376                 return 1;
 377         }
 378
 379         if(conf_only)
 380                 return 0;
 381
 382         if(create_targets())
 383                 return 1;
 384
 385         cout<<packages.size()<<" packages, "<<targets.size()<<" targets\n";
 386         if(verbose>=2)
 387         {
 388                 for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 389                 {
 390                         cout<<' '<<i->second->get_name();
 391                         if(i->second->get_buildable())
 392                                 cout<<'*';
 393                         unsigned count=0;
 394                         unsigned ood_count=0;
 395                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 396                                 if(j->second->get_package()==i->second)
 397                                 {
 398                                         ++count;
 399                                         if(j->second->get_rebuild())
 400                                                 ++ood_count;
 401                                 }
 402                         if(count)
 403                         {
 404                                 cout<<" ("<<count<<" targets";
 405                                 if(ood_count)
 406                                         cout<<", "<<ood_count<<" out-of-date";
 407                                 cout<<')';
 408                         }
 409                         cout<<'\n';
 410                 }
 411         }
 412
 413         if(analyzer)
 414                 analyzer->analyze();
 415
 416         //if(create_makefile
 417
 418         if(clean)
 419                 exit_code=do_clean();
 420         else if(build)
 421                 exit_code=do_build();
 422
 423         return exit_code;
 424 }
 425
 426 Builder::~Builder()
 427 {
 428         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 429                 delete i->second;
 430         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 431                 delete i->second;
 432         delete analyzer;
 433 }
 434
 435 void Builder::usage(const char *reason, const char *argv0, bool brief)
 436 {
 437         if(reason)
 438                 cerr<<reason<<'\n';
 439
 440         if(brief)
 441                 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> ...]";
 442         else
 443         {
 444                 cerr<<
 445                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 446                         "\n"
 447                         "Options:\n"
 448                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 449                         "  -b, --build         Perform build even if doing analysis.\n"
 450                         "  -c, --clean         Clean buildable targets.\n"
 451                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 452                         "  -h, --help          Print this message.\n"
 453                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 454                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 455                         "  -v, --verbose       Print more information about what's going on.\n"
 456                         "  -A, --conf-all      Apply configuration to all packages.\n"
 457                         "  -B, --build-all     Build all targets unconditionally.\n"
 458                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 459                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 460                         "  --chrome            Use extra chrome to print status.\n"
 461                         "  --conf-only         Stop after configuring packages.\n"
 462                         "  --full-paths        Output full paths in analysis.\n"
 463                         //"  --makefile          Create a makefile for this package.\n"
 464                         "  --max-depth NUM     Maximum depth to show in analysis.\n";
 465         }
 466 }
 467
 468 /**
 469 Loads the given build file.
 470
 471 @param   fn  Path to the file
 472
 473 @return  0 on success, -1 if the file could not be opened
 474 */
 475 int Builder::load_build_file(const Path::Path &fn)
 476 {
 477         ifstream in(fn.str().c_str());
 478         if(!in)
 479                 return -1;
 480
 481         Parser::Parser parser(in, fn.str());
 482         Loader loader(*this, fn.subpath(0, fn.size()-1));
 483         loader.load(parser);
 484
 485         return 0;
 486 }
 487
 488 /**
 489 Creates targets for all packages and prepares them for building.
 490
 491 @return  0 if everything went ok, -1 if something bad happened and a build
 492          shouldn't be attempted
 493 */
 494 int Builder::create_targets()
 495 {
 496         Target *world=new VirtualTarget(*this, "world");
 497
 498         Target *def_tgt=new VirtualTarget(*this, "default");
 499         world->add_depend(def_tgt);
 500
 501         Target *install=new VirtualTarget(*this, "install");
 502         world->add_depend(install);
 503
 504         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 505         {
 506                 if(!i->second)
 507                         continue;
 508                 if(!i->second->get_buildable())
 509                         continue;
 510
 511                 const ComponentList &components=i->second->get_components();
 512                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 513                         j->create_targets();
 514
 515                 if(i->second->get_install_flags()&(Package::LIB|Package::INCLUDE))
 516                 {
 517                         PkgConfig *pc=new PkgConfig(*this, *i->second);
 518                         install->add_depend(new Install(*this, *i->second, *pc));
 519                 }
 520         }
 521
 522         // Find dependencies until no new targets are created
 523         while(!new_tgts.empty())
 524         {
 525                 Target *tgt=new_tgts.front();
 526                 new_tgts.erase(new_tgts.begin());
 527                 tgt->find_depends();
 528                 if(!tgt->get_depends_ready())
 529                         new_tgts.push_back(tgt);
 530         }
 531
 532         // Apply what-ifs
 533         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 534         {
 535                 Target *tgt=get_target((cwd/ *i).str());
 536                 if(!tgt)
 537                 {
 538                         cerr<<"Unknown what-if target "<<*i<<'\n';
 539                         return -1;
 540                 }
 541                 tgt->touch();
 542         }
 543
 544         // Make the cmdline target depend on all targets mentioned on the command line
 545         Target *cmdline=new VirtualTarget(*this, "cmdline");
 546         bool build_world=false;
 547         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 548         {
 549                 Target *tgt=get_target(*i);
 550                 if(!tgt)
 551                         tgt=get_target((cwd/ *i).str());
 552                 if(!tgt)
 553                 {
 554                         cerr<<"I don't know anything about "<<*i<<'\n';
 555                         return -1;
 556                 }
 557                 if(tgt==world)
 558                         build_world=true;
 559                 cmdline->add_depend(tgt);
 560         }
 561
 562         /* If world is to be built, prepare cmdline.  If not, add cmdline to world
 563            and prepare world.  I don't really like this, but it keeps the graph
 564            acyclic. */
 565         if(build_world)
 566                 cmdline->prepare();
 567         else
 568         {
 569                 world->add_depend(cmdline);
 570                 world->prepare();
 571         }
 572
 573         return 0;
 574 }
 575
 576 /**
 577 Check if a header exists, either as a target or a file.  Either an existing
 578 target or a new SystemHeader target will be returned.
 579 */
 580 Target *Builder::get_header(const Msp::Path::Path &fn)
 581 {
 582         Target *tgt=get_target(fn.str());
 583         if(tgt) return tgt;
 584
 585         if(Path::exists(fn))
 586         {
 587                 tgt=new SystemHeader(*this, fn.str());
 588                 return tgt;
 589         }
 590         return 0;
 591 }
 592
 593 Target *Builder::get_library(const string &lib, const string &arch, const Path::Path &path, LibMode mode)
 594 {
 595         // Populate a list of candidate filenames
 596         StringList candidates;
 597
 598         if(mode!=ALL_STATIC)
 599         {
 600                 if(arch=="win32")
 601                         candidates.push_back("lib"+lib+".dll");
 602                 else
 603                         candidates.push_back("lib"+lib+".so");
 604         }
 605
 606         /* Static libraries are always considered, since sometimes shared versions
 607         may not be available */
 608         candidates.push_back("lib"+lib+".a");
 609         if(arch=="win32")
 610                 candidates.push_back("lib"+lib+".dll.a");
 611
 612         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 613         {
 614                 string full=(path/ *i).str();
 615                 Target *tgt=get_target(full);
 616
 617                 if(tgt)
 618                 {
 619                         Target *real_tgt=tgt;
 620                         if(dynamic_cast<Install *>(tgt))
 621                                 real_tgt=real_tgt->get_depends().front();
 622
 623                         /* Ignore dynamic libraries from local packages unless library mode is
 624                         DYNAMIC */
 625                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 626                                 continue;
 627                         else if(tgt)
 628                                 return tgt;
 629                 }
 630                 else if(Path::exists(full))
 631                 {
 632                         tgt=new SystemLibrary(*this, full);
 633                         return tgt;
 634                 }
 635         }
 636
 637         return 0;
 638 }
 639
 640 /**
 641 Updates a hash with a string.  This is used from get_header and get_library.
 642 */
 643 void Builder::update_hash(string &hash, const string &value)
 644 {
 645         for(unsigned i=0; i<value.size(); ++i)
 646                 hash[i%hash.size()]^=value[i];
 647 }
 648
 649 /**
 650 This function supervises the build process, starting new actions when slots
 651 become available.
 652 */
 653 int Builder::do_build()
 654 {
 655         Target *cmdline=get_target("cmdline");
 656
 657         unsigned total=cmdline->count_rebuild();
 658         if(!total)
 659         {
 660                 cout<<"Already up to date\n";
 661                 return 0;
 662         }
 663         cout<<"Will build "<<total<<" target(s)\n";
 664
 665         vector<Action *> actions;
 666
 667         if(chrome)
 668                 cout<<"0 targets built\n";
 669         unsigned count=0;
 670
 671         bool fail=false;
 672         bool finish=false;
 673
 674         while(!finish)
 675         {
 676                 if(actions.size()<jobs && !fail)
 677                 {
 678                         Target *tgt=cmdline->get_buildable_target();
 679                         if(tgt)
 680                         {
 681                                 Action *action=tgt->build();
 682                                 if(action)
 683                                         actions.push_back(action);
 684                         }
 685                         else if(actions.empty())
 686                                 finish=true;
 687                 }
 688                 else
 689                         Time::sleep(10*Time::msec);
 690
 691                 for(unsigned i=0; i<actions.size();)
 692                 {
 693                         int status=actions[i]->check();
 694                         if(status>=0)
 695                         {
 696                                 ++count;
 697                                 if(chrome)
 698                                 {
 699                                         cout<<"\e["<<actions.size()+1<<'A';
 700                                         cout<<count<<" targets built\n";
 701                                         if(i)
 702                                                 cout<<"\e["<<i<<"B";
 703                                         cout<<"\e[M";
 704                                         if(i<actions.size()-1)
 705                                                 cout<<"\e["<<actions.size()-i-1<<"B";
 706                                         cout.flush();
 707                                 }
 708                                 delete actions[i];
 709                                 actions.erase(actions.begin()+i);
 710                                 if(status>0)
 711                                         fail=true;
 712                                 if(actions.empty() && fail)
 713                                         finish=true;
 714                         }
 715                         else
 716                                 ++i;
 717                 }
 718         }
 719
 720         if(fail)
 721                 cout<<"Build failed\n";
 722
 723         return fail?1:0;
 724 }
 725
 726 /**
 727 Cleans buildable targets.  If clean is 1, cleans only this package.  If
 728 clean is 2 or greater, cleans all buildable packages.
 729 */
 730 int Builder::do_clean()
 731 {
 732         // Cleaning doesn't care about ordering, so a simpler method can be used
 733
 734         set<Target *> clean_tgts;
 735         TargetList queue;
 736         queue.push_back(get_target("cmdline"));
 737
 738         while(!queue.empty())
 739         {
 740                 Target *tgt=queue.front();
 741                 queue.erase(queue.begin());
 742
 743                 if(tgt->get_buildable() && (tgt->get_package()==default_pkg || clean>=2))
 744                         clean_tgts.insert(tgt);
 745
 746                 const TargetList &deps=tgt->get_depends();
 747                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 748                         if(!clean_tgts.count(*i))
 749                                 queue.push_back(*i);
 750         }
 751
 752         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 753         {
 754                 Action *action=new Unlink(*this, **i);
 755                 while(action->check()<0);
 756                 delete action;
 757         }
 758
 759         return 0;
 760 }
 761
 762 /**
 763 Prints out information about the default package.
 764 */
 765 void Builder::package_help()
 766 {
 767         const Config &config=default_pkg->get_config();
 768         const Config::OptionMap &options=config.get_options();
 769
 770         cout<<"Required packages:\n  ";
 771         const PkgRefList &requires=default_pkg->get_requires();
 772         for(PkgRefList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 773         {
 774                 if(i!=requires.begin())
 775                         cout<<", ";
 776                 cout<<i->get_name();
 777         }
 778         cout<<"\n\n";
 779         cout<<"Package configuration:\n";
 780         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 781         {
 782                 const Config::Option &opt=i->second;
 783                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 784         }
 785 }
 786
 787 Application::RegApp<Builder> Builder::reg;
 788
 789 Builder::Loader::Loader(Builder &b, const Path::Path &s):
 790         bld(b),
 791         src(s)
 792 {
 793         add("package", &Loader::package);
 794 }
 795
 796 void Builder::Loader::package(const string &n)
 797 {
 798         Package *pkg=new Package(bld, n, src);
 799         load_sub(*pkg);
 800         bld.packages.insert(PackageMap::value_type(n, pkg));
 801         bld.new_pkgs.push_back(pkg);
 802 }
 803