source/builder.cpp

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