source/builder.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <fstream>
   9 #include <iostream>
  10 #include <set>
  11 #include <msp/core/error.h>
  12 #include <msp/core/getopt.h>
  13 #include <msp/parser/parser.h>
  14 #include <msp/path/utils.h>
  15 #include <msp/strings/utils.h>
  16 #include <msp/time/units.h>
  17 #include <msp/time/utils.h>
  18 #include "action.h"
  19 #include "analyzer.h"
  20 #include "builder.h"
  21 #include "header.h"
  22 #include "install.h"
  23 #include "misc.h"
  24 #include "package.h"
  25 #include "pkgconfig.h"
  26 #include "sharedlibrary.h"
  27 #include "systemlibrary.h"
  28 #include "unlink.h"
  29 #include "virtualtarget.h"
  30
  31 using namespace std;
  32 using namespace Msp;
  33
  34 Builder::Builder(int argc, char **argv):
  35         analyzer(0),
  36         build(false),
  37         clean(0),
  38         dry_run(false),
  39         help(false),
  40         verbose(1),
  41         chrome(false),
  42         build_file("Build"),
  43         jobs(1),
  44         conf_all(false),
  45         conf_only(false),
  46         build_all(false),
  47         create_makefile(false)
  48 {
  49         string   analyze_mode;
  50         string   work_dir;
  51         bool     full_paths=false;
  52         unsigned max_depth=5;
  53
  54         GetOpt getopt;
  55         getopt.add_option('a', "analyze",    analyze_mode, GetOpt::REQUIRED_ARG);
  56         getopt.add_option('b', "build",      build,        GetOpt::NO_ARG);
  57         getopt.add_option('c', "clean",      clean,        GetOpt::NO_ARG);
  58         getopt.add_option('f', "file",       build_file,   GetOpt::REQUIRED_ARG);
  59         getopt.add_option('h', "help",       help,         GetOpt::NO_ARG);
  60         getopt.add_option('j', "jobs",       jobs,         GetOpt::REQUIRED_ARG);
  61         getopt.add_option('n', "dry-run",    dry_run,      GetOpt::NO_ARG);
  62         getopt.add_option('v', "verbose",    verbose,      GetOpt::NO_ARG);
  63         getopt.add_option('A', "conf-all",   conf_all,     GetOpt::NO_ARG);
  64         getopt.add_option('B', "build-all",  build_all,    GetOpt::NO_ARG);
  65         getopt.add_option('C', "chdir",      work_dir,     GetOpt::REQUIRED_ARG);
  66         getopt.add_option('W', "what-if",    what_if,      GetOpt::REQUIRED_ARG);
  67         getopt.add_option(     "chrome",     chrome,       GetOpt::NO_ARG);
  68         getopt.add_option(     "conf-only",  conf_only,    GetOpt::NO_ARG);
  69         getopt.add_option(     "full-paths", full_paths,   GetOpt::NO_ARG);
  70         //getopt.add_option(     "makefile",   create_makefile, GetOpt::NO_ARG);
  71         getopt.add_option(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  72         getopt(argc, argv);
  73
  74         if(!analyze_mode.empty())
  75         {
  76                 analyzer=new Analyzer(*this);
  77
  78                 if(analyze_mode=="deps")
  79                         analyzer->set_mode(Analyzer::DEPS);
  80                 else if(analyze_mode=="alldeps")
  81                         analyzer->set_mode(Analyzer::ALLDEPS);
  82                 else if(analyze_mode=="rebuild")
  83                         analyzer->set_mode(Analyzer::REBUILD);
  84                 else if(analyze_mode=="rdeps")
  85                         analyzer->set_mode(Analyzer::RDEPS);
  86                 else
  87                         throw UsageError("Invalid analyze mode");
  88
  89                 analyzer->set_max_depth(max_depth);
  90                 analyzer->set_full_paths(full_paths);
  91         }
  92         else if(!clean && !create_makefile)
  93                 build=true;
  94
  95         const list<string> &args=getopt.get_args();
  96         for(list<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
  97         {
  98                 unsigned equal=i->find('=');
  99                 if(equal!=string::npos)
 100                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 101                 else
 102                         cmdline_targets.push_back(*i);
 103         }
 104
 105         if(cmdline_targets.empty())
 106                 cmdline_targets.push_back("default");
 107
 108         if(!work_dir.empty())
 109                 chdir(work_dir.c_str());
 110
 111         cwd=Path::getcwd();
 112
 113         archs.insert(StringMap::value_type("native", ""));
 114         archs.insert(StringMap::value_type("arm", "arm-linux-gnu"));
 115         archs.insert(StringMap::value_type("win32", "i586-mingw32msvc"));
 116
 117         StringMap &native_tools=tools.insert(ToolMap::value_type("native", StringMap())).first->second;
 118         native_tools.insert(StringMap::value_type("CC",   "gcc"));
 119         native_tools.insert(StringMap::value_type("CXX",  "g++"));
 120         native_tools.insert(StringMap::value_type("LD",   "gcc"));
 121         native_tools.insert(StringMap::value_type("LDXX", "g++"));
 122         native_tools.insert(StringMap::value_type("AR",   "ar"));
 123
 124         StringMap &release_profile=profile_tmpl.insert(ProfileTemplateMap::value_type("release", StringMap())).first->second;
 125         release_profile.insert(StringMap::value_type("optimize", "3"));
 126         release_profile.insert(StringMap::value_type("outdir",   "$profile"));
 127
 128         StringMap &debug_profile=profile_tmpl.insert(ProfileTemplateMap::value_type("debug", StringMap())).first->second;
 129         debug_profile.insert(StringMap::value_type("debug",  "1"));
 130         debug_profile.insert(StringMap::value_type("outdir", "$profile"));
 131
 132         for(StringMap::iterator i=archs.begin(); i!=archs.end(); ++i)
 133         {
 134                 if(i->first=="native")
 135                         continue;
 136
 137                 StringMap &arch_profile=profile_tmpl.insert(ProfileTemplateMap::value_type(i->first, StringMap())).first->second;
 138                 arch_profile.insert(StringMap::value_type("arch",   i->first));
 139                 arch_profile.insert(StringMap::value_type("prefix", "$HOME/local/$arch"));
 140                 arch_profile.insert(StringMap::value_type("outdir", "$profile"));
 141         }
 142 }
 143
 144 /**
 145 Gets a package with the specified name, possibly creating it.
 146
 147 @param   n  Package name
 148
 149 @return  Pointer to the package, or 0 if the package could not be located
 150 */
 151 Package *Builder::get_package(const string &n)
 152 {
 153         PackageMap::iterator i=packages.find(n);
 154         if(i!=packages.end())
 155                 return i->second;
 156
 157         // Try to get source directory with pkgconfig
 158         list<string> argv;
 159         argv.push_back("pkg-config");
 160         argv.push_back("--variable=source");
 161         argv.push_back(n);
 162         string srcdir=strip(run_command(argv));
 163
 164         PathList dirs;
 165         if(!srcdir.empty())
 166                 dirs.push_back(srcdir);
 167
 168         // Make some other guesses about the source directory
 169         string dirname=n;
 170         if(!dirname.compare(0, 3, "msp"))
 171                 dirname.erase(0, 3);
 172         dirs.push_back(cwd/dirname);
 173         dirs.push_back(cwd/".."/dirname);
 174
 175         // Go through the candidate directories and look for a Build file
 176         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 177                 if(!load_build_file(*j/"Build"))
 178                 {
 179                         i=packages.find(n);
 180                         if(i!=packages.end())
 181                                 return i->second;
 182                         break;
 183                 }
 184
 185         // Package source not found - create a binary package
 186         Package *pkg=Package::create(*this, n);
 187         packages.insert(PackageMap::value_type(n, pkg));
 188         if(pkg)
 189                 new_pkgs.push_back(pkg);
 190
 191         return pkg;
 192 }
 193
 194 /**
 195 Returns the target with the given name, or 0 if no such target exists.
 196 */
 197 Target *Builder::get_target(const string &n) const
 198 {
 199         TargetMap::const_iterator i=targets.find(n);
 200         if(i!=targets.end())
 201                 return i->second;
 202         return 0;
 203 }
 204
 205 /**
 206 Tries to locate a header included from a given location and with a given include
 207 path.  Considers known targets as well as existing files.  If a matching target
 208 is not found but a file exists, a new SystemHeader target will be created and
 209 returned.
 210 */
 211 Target *Builder::get_header(const string &include, const string &, const string &from, const list<string> &path)
 212 {
 213         string hash(8, 0);
 214         update_hash(hash, from);
 215         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 216                 update_hash(hash, *i);
 217
 218         string id=hash+include;
 219         TargetMap::iterator i=includes.find(id);
 220         if(i!=includes.end())
 221                 return i->second;
 222
 223         string fn=include.substr(1);
 224         Target *tgt=0;
 225         if(include[0]=='"' && (tgt=get_header(Path::Path(from)/fn)))
 226                 ;
 227         else if((tgt=get_header(Path::Path("/usr/include")/fn)))
 228                 ;
 229         //XXX Determine the C++ header location dynamically
 230         else if((tgt=get_header(Path::Path("/usr/include/c++/4.1.2")/fn)))
 231                 ;
 232         else
 233         {
 234                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 235                         tgt=get_header(cwd/ *j/fn);
 236         }
 237
 238         includes.insert(TargetMap::value_type(id, tgt));
 239
 240         return tgt;
 241 }
 242
 243 /**
 244 Tries to locate a library with the given library path.  Considers known targets
 245 as well as existing files.  If a matching target is not found but a file exists,
 246 a new SystemLibrary target will be created and returned.
 247
 248 @param   lib   Name of the library to get (without "lib" prefix or extension)
 249 @param   path  List of paths to search for the library
 250 @param   mode  Shared / static mode
 251
 252 @return  Some kind of library target, if a match was found
 253 */
 254 Target *Builder::get_library(const string &lib, const string &arch, const list<string> &path, LibMode mode)
 255 {
 256         string hash(8, 0);
 257         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 258                 update_hash(hash, *i);
 259
 260         //XXX Incorporate mode into id
 261         string id=hash+lib;
 262         TargetMap::iterator i=libraries.find(id);
 263         if(i!=libraries.end())
 264                 return i->second;
 265
 266         StringList syspath;
 267         if(arch=="native")
 268         {
 269                 syspath.push_back("/lib");
 270                 syspath.push_back("/usr/lib");
 271         }
 272         else
 273                 syspath.push_back("/usr/"+get_arch_prefix(arch)+"/lib");
 274
 275         Target *tgt=0;
 276         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 277                 tgt=get_library(lib, arch, *j, mode);
 278         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 279                 tgt=get_library(lib, arch, cwd/ *j, mode);
 280
 281         libraries.insert(TargetMap::value_type(id, tgt));
 282
 283         return tgt;
 284 }
 285
 286 const string &Builder::get_arch_prefix(const string &arch) const
 287 {
 288         StringMap::const_iterator i=archs.find(arch);
 289         if(i==archs.end())
 290                 throw InvalidParameterValue("Unknown architecture");
 291
 292         return i->second;
 293 }
 294
 295 string Builder::get_tool(const std::string &tool, const std::string &arch)
 296 {
 297         ToolMap::iterator i=tools.find(arch);
 298         if(i!=tools.end())
 299         {
 300                 StringMap::iterator j=i->second.find(tool);
 301                 if(j!=i->second.end())
 302                         return j->second;
 303         }
 304
 305         // Either the arch, or the tool within the arch was not found
 306         i=tools.find("native");
 307         StringMap::iterator j=i->second.find(tool);
 308         if(j==i->second.end())
 309                 throw InvalidParameterValue("Unknown tool");
 310
 311         return get_arch_prefix(arch)+"-"+j->second;
 312 }
 313
 314 void Builder::apply_profile_template(Config &config, const string &pt) const
 315 {
 316         vector<string> parts=split(pt, '-');
 317
 318         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 319         {
 320                 ProfileTemplateMap::const_iterator j=profile_tmpl.find(*i);
 321                 if(j==profile_tmpl.end())
 322                         continue;
 323
 324                 config.update(j->second);
 325         }
 326 }
 327
 328 /**
 329 Adds a target to both the target map and the new target queue.  Called from
 330 Target constructor.
 331 */
 332 void Builder::add_target(Target *t)
 333 {
 334         targets.insert(TargetMap::value_type(t->get_name(), t));
 335         new_tgts.push_back(t);
 336 }
 337
 338 int Builder::main()
 339 {
 340         if(load_build_file(cwd/build_file))
 341         {
 342                 cerr<<"No build info here.\n";
 343                 return 1;
 344         }
 345
 346         default_pkg=packages.begin()->second;
 347
 348         while(!new_pkgs.empty())
 349         {
 350                 Package *pkg=new_pkgs.front();
 351                 new_pkgs.erase(new_pkgs.begin());
 352                 pkg->resolve_refs();
 353         }
 354
 355         default_pkg->configure(cmdline_options, conf_all?2:1);
 356
 357         if(help)
 358         {
 359                 usage(0, "builder", false);
 360                 cout<<'\n';
 361                 package_help();
 362                 return 0;
 363         }
 364
 365         StringMap problems;
 366         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 367         {
 368                 string prob;
 369                 if(!i->second)
 370                         prob="missing";
 371                 else if(i->second->get_buildable() && i->second->get_arch()!=default_pkg->get_arch())
 372                         prob="wrong architecture ("+i->second->get_arch()+")";
 373                 if(!prob.empty())
 374                         problems.insert(StringMap::value_type(i->first, prob));
 375         }
 376
 377         if(!problems.empty())
 378         {
 379                 cerr<<"The following problems were detected:\n";
 380                 for(StringMap::iterator i=problems.begin(); i!=problems.end(); ++i)
 381                         cerr<<"  "<<i->first<<": "<<i->second<<'\n';
 382                 cerr<<"Please fix them and try again.\n";
 383                 return 1;
 384         }
 385
 386         if(conf_only)
 387                 return 0;
 388
 389         if(create_targets())
 390                 return 1;
 391
 392         cout<<packages.size()<<" packages, "<<targets.size()<<" targets\n";
 393         if(verbose>=2)
 394         {
 395                 for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 396                 {
 397                         cout<<' '<<i->second->get_name();
 398                         if(i->second->get_buildable())
 399                                 cout<<'*';
 400                         unsigned count=0;
 401                         unsigned ood_count=0;
 402                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 403                                 if(j->second->get_package()==i->second)
 404                                 {
 405                                         ++count;
 406                                         if(j->second->get_rebuild())
 407                                                 ++ood_count;
 408                                 }
 409                         if(count)
 410                         {
 411                                 cout<<" ("<<count<<" targets";
 412                                 if(ood_count)
 413                                         cout<<", "<<ood_count<<" out-of-date";
 414                                 cout<<')';
 415                         }
 416                         cout<<'\n';
 417                 }
 418         }
 419
 420         if(analyzer)
 421                 analyzer->analyze();
 422
 423         //if(create_makefile
 424
 425         if(clean)
 426                 exit_code=do_clean();
 427         else if(build)
 428                 exit_code=do_build();
 429
 430         return exit_code;
 431 }
 432
 433 Builder::~Builder()
 434 {
 435         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 436                 delete i->second;
 437         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 438                 delete i->second;
 439         delete analyzer;
 440 }
 441
 442 void Builder::usage(const char *reason, const char *argv0, bool brief)
 443 {
 444         if(reason)
 445                 cerr<<reason<<'\n';
 446
 447         if(brief)
 448                 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> ...]";
 449         else
 450         {
 451                 cerr<<
 452                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 453                         "\n"
 454                         "Options:\n"
 455                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 456                         "  -b, --build         Perform build even if doing analysis.\n"
 457                         "  -c, --clean         Clean buildable targets.\n"
 458                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 459                         "  -h, --help          Print this message.\n"
 460                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 461                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 462                         "  -v, --verbose       Print more information about what's going on.\n"
 463                         "  -A, --conf-all      Apply configuration to all packages.\n"
 464                         "  -B, --build-all     Build all targets unconditionally.\n"
 465                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 466                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 467                         "  --chrome            Use extra chrome to print status.\n"
 468                         "  --conf-only         Stop after configuring packages.\n"
 469                         "  --full-paths        Output full paths in analysis.\n"
 470                         //"  --makefile          Create a makefile for this package.\n"
 471                         "  --max-depth NUM     Maximum depth to show in analysis.\n";
 472         }
 473 }
 474
 475 /**
 476 Loads the given build file.
 477
 478 @param   fn  Path to the file
 479
 480 @return  0 on success, -1 if the file could not be opened
 481 */
 482 int Builder::load_build_file(const Path::Path &fn)
 483 {
 484         ifstream in(fn.str().c_str());
 485         if(!in)
 486                 return -1;
 487
 488         Parser::Parser parser(in, fn.str());
 489         Loader loader(*this, fn.subpath(0, fn.size()-1));
 490         loader.load(parser);
 491
 492         return 0;
 493 }
 494
 495 /**
 496 Creates targets for all packages and prepares them for building.
 497
 498 @return  0 if everything went ok, -1 if something bad happened and a build
 499          shouldn't be attempted
 500 */
 501 int Builder::create_targets()
 502 {
 503         Target *world=new VirtualTarget(*this, "world");
 504
 505         Target *def_tgt=new VirtualTarget(*this, "default");
 506         world->add_depend(def_tgt);
 507
 508         Target *install=new VirtualTarget(*this, "install");
 509         world->add_depend(install);
 510
 511         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 512         {
 513                 if(!i->second)
 514                         continue;
 515                 if(!i->second->get_buildable())
 516                         continue;
 517
 518                 const ComponentList &components=i->second->get_components();
 519                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 520                         j->create_targets();
 521
 522                 if(i->second->get_install_flags()&(Package::LIB|Package::INCLUDE))
 523                 {
 524                         PkgConfig *pc=new PkgConfig(*this, *i->second);
 525                         install->add_depend(new Install(*this, *i->second, *pc));
 526                 }
 527         }
 528
 529         // Find dependencies until no new targets are created
 530         while(!new_tgts.empty())
 531         {
 532                 Target *tgt=new_tgts.front();
 533                 new_tgts.erase(new_tgts.begin());
 534                 tgt->find_depends();
 535                 if(!tgt->get_depends_ready())
 536                         new_tgts.push_back(tgt);
 537         }
 538
 539         // Apply what-ifs
 540         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 541         {
 542                 Target *tgt=get_target((cwd/ *i).str());
 543                 if(!tgt)
 544                 {
 545                         cerr<<"Unknown what-if target "<<*i<<'\n';
 546                         return -1;
 547                 }
 548                 tgt->touch();
 549         }
 550
 551         // Make the cmdline target depend on all targets mentioned on the command line
 552         Target *cmdline=new VirtualTarget(*this, "cmdline");
 553         bool build_world=false;
 554         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 555         {
 556                 Target *tgt=get_target(*i);
 557                 if(!tgt)
 558                         tgt=get_target((cwd/ *i).str());
 559                 if(!tgt)
 560                 {
 561                         cerr<<"I don't know anything about "<<*i<<'\n';
 562                         return -1;
 563                 }
 564                 if(tgt==world)
 565                         build_world=true;
 566                 cmdline->add_depend(tgt);
 567         }
 568
 569         /* If world is to be built, prepare cmdline.  If not, add cmdline to world
 570            and prepare world.  I don't really like this, but it keeps the graph
 571            acyclic. */
 572         if(build_world)
 573                 cmdline->prepare();
 574         else
 575         {
 576                 world->add_depend(cmdline);
 577                 world->prepare();
 578         }
 579
 580         return 0;
 581 }
 582
 583 /**
 584 Check if a header exists, either as a target or a file.  Either an existing
 585 target or a new SystemHeader target will be returned.
 586 */
 587 Target *Builder::get_header(const Msp::Path::Path &fn)
 588 {
 589         Target *tgt=get_target(fn.str());
 590         if(tgt) return tgt;
 591
 592         if(Path::exists(fn))
 593         {
 594                 tgt=new SystemHeader(*this, fn.str());
 595                 return tgt;
 596         }
 597         return 0;
 598 }
 599
 600 Target *Builder::get_library(const string &lib, const string &arch, const Path::Path &path, LibMode mode)
 601 {
 602         // Populate a list of candidate filenames
 603         StringList candidates;
 604
 605         if(mode!=ALL_STATIC)
 606         {
 607                 if(arch=="win32")
 608                         candidates.push_back("lib"+lib+".dll");
 609                 else
 610                         candidates.push_back("lib"+lib+".so");
 611         }
 612
 613         /* Static libraries are always considered, since sometimes shared versions
 614         may not be available */
 615         candidates.push_back("lib"+lib+".a");
 616         if(arch=="win32")
 617                 candidates.push_back("lib"+lib+".dll.a");
 618
 619         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 620         {
 621                 string full=(path/ *i).str();
 622                 Target *tgt=get_target(full);
 623
 624                 if(tgt)
 625                 {
 626                         Target *real_tgt=tgt;
 627                         if(dynamic_cast<Install *>(tgt))
 628                                 real_tgt=real_tgt->get_depends().front();
 629
 630                         /* Ignore dynamic libraries from local packages unless library mode is
 631                         DYNAMIC */
 632                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 633                                 continue;
 634                         else if(tgt)
 635                                 return tgt;
 636                 }
 637                 else if(Path::exists(full))
 638                 {
 639                         tgt=new SystemLibrary(*this, full);
 640                         return tgt;
 641                 }
 642         }
 643
 644         return 0;
 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::do_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 Cleans buildable targets.  If clean is 1, cleans only this package.  If
 735 clean is 2 or greater, cleans all buildable packages.
 736 */
 737 int Builder::do_clean()
 738 {
 739         // Cleaning doesn't care about ordering, so a simpler method can be used
 740
 741         set<Target *> clean_tgts;
 742         TargetList queue;
 743         queue.push_back(get_target("cmdline"));
 744
 745         while(!queue.empty())
 746         {
 747                 Target *tgt=queue.front();
 748                 queue.erase(queue.begin());
 749
 750                 if(tgt->get_buildable() && (tgt->get_package()==default_pkg || clean>=2))
 751                         clean_tgts.insert(tgt);
 752
 753                 const TargetList &deps=tgt->get_depends();
 754                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 755                         if(!clean_tgts.count(*i))
 756                                 queue.push_back(*i);
 757         }
 758
 759         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 760         {
 761                 Action *action=new Unlink(*this, **i);
 762                 while(action->check()<0);
 763                 delete action;
 764         }
 765
 766         return 0;
 767 }
 768
 769 /**
 770 Prints out information about the default package.
 771 */
 772 void Builder::package_help()
 773 {
 774         const Config &config=default_pkg->get_config();
 775         const Config::OptionMap &options=config.get_options();
 776
 777         cout<<"Required packages:\n  ";
 778         const PkgRefList &requires=default_pkg->get_requires();
 779         for(PkgRefList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 780         {
 781                 if(i!=requires.begin())
 782                         cout<<", ";
 783                 cout<<i->get_name();
 784         }
 785         cout<<"\n\n";
 786         cout<<"Package configuration:\n";
 787         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 788         {
 789                 const Config::Option &opt=i->second;
 790                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 791         }
 792 }
 793
 794 Application::RegApp<Builder> Builder::reg;
 795
 796 Builder::Loader::Loader(Builder &b, const Path::Path &s):
 797         bld(b),
 798         src(s)
 799 {
 800         add("package", &Loader::package);
 801 }
 802
 803 void Builder::Loader::package(const string &n)
 804 {
 805         Package *pkg=new Package(bld, n, src);
 806         load_sub(*pkg);
 807         bld.packages.insert(PackageMap::value_type(n, pkg));
 808         bld.new_pkgs.push_back(pkg);
 809 }
 810