source/builder.cpp

   1 #include <fstream>
   2 #include <iostream>
   3 #include <msp/progress.h>
   4 #include <msp/core/error.h>
   5 #include <msp/getopt++/getopt++.h>
   6 #include <msp/parser/parser.h>
   7 #include <msp/path/utils.h>
   8 #include <msp/strings/utils.h>
   9 #include <msp/time/units.h>
  10 #include <msp/time/utils.h>
  11 #include "action.h"
  12 #include "analyzer.h"
  13 #include "builder.h"
  14 #include "executable.h"
  15 #include "header.h"
  16 #include "install.h"
  17 #include "misc.h"
  18 #include "objectfile.h"
  19 #include "package.h"
  20 #include "pkgconfig.h"
  21 #include "sharedlibrary.h"
  22 #include "staticlibrary.h"
  23 #include "systemlibrary.h"
  24 #include "virtualtarget.h"
  25
  26 using namespace std;
  27 using namespace Msp;
  28
  29 Builder::Builder(int argc, char **argv):
  30         analyzer(0),
  31         do_build(false),
  32         dry_run(false),
  33         help(false),
  34         verbose(1),
  35         chrome(false),
  36         build_file("Build"),
  37         jobs(1),
  38         conf_all(false),
  39         conf_only(false),
  40         build_all(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",      do_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(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  64         getopt(argc, argv);
  65
  66         if(!analyze_mode.empty())
  67         {
  68                 analyzer=new Analyzer(*this);
  69
  70                 if(analyze_mode=="deps")
  71                         analyzer->set_mode(Analyzer::DEPS);
  72                 else if(analyze_mode=="alldeps")
  73                         analyzer->set_mode(Analyzer::ALLDEPS);
  74                 else if(analyze_mode=="rebuild")
  75                         analyzer->set_mode(Analyzer::REBUILD);
  76                 else if(analyze_mode=="rdeps")
  77                         analyzer->set_mode(Analyzer::RDEPS);
  78                 else
  79                         throw UsageError("Invalid analyze mode");
  80
  81                 analyzer->set_max_depth(max_depth);
  82                 analyzer->set_full_paths(full_paths);
  83         }
  84         else
  85                 do_build=true;
  86
  87         const list<string> &args=getopt.get_args();
  88         for(list<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
  89         {
  90                 unsigned equal=i->find('=');
  91                 if(equal!=string::npos)
  92                         cmdline_options.insert(RawOptionMap::value_type(i->substr(0, equal), i->substr(equal+1)));
  93                 else
  94                         cmdline_targets.push_back(*i);
  95         }
  96
  97         if(cmdline_targets.empty())
  98                 cmdline_targets.push_back("default");
  99
 100         if(!work_dir.empty())
 101                 chdir(work_dir.c_str());
 102
 103         cwd=Path::getcwd();
 104
 105         archs.insert(StringMap::value_type("native", ""));
 106         archs.insert(StringMap::value_type("arm", "arm-linux-gnu-"));
 107         archs.insert(StringMap::value_type("win32", "i586-mingw32msvc-"));
 108
 109         StringMap &native_tools=tools.insert(ToolMap::value_type("native", StringMap())).first->second;
 110         native_tools.insert(StringMap::value_type("CC",   "gcc"));
 111         native_tools.insert(StringMap::value_type("CXX",  "g++"));
 112         native_tools.insert(StringMap::value_type("LD",   "gcc"));
 113         native_tools.insert(StringMap::value_type("LDXX", "g++"));
 114         native_tools.insert(StringMap::value_type("AR",   "ar"));
 115 }
 116
 117 /**
 118 Gets a package with the specified name, possibly creating it.
 119
 120 @param   n  Package name
 121
 122 @return  Pointer to the package, or 0 if the package could not be located
 123 */
 124 Package *Builder::get_package(const string &n)
 125 {
 126         PackageMap::iterator i=packages.find(n);
 127         if(i!=packages.end())
 128                 return i->second;
 129
 130         // Try to get source directory with pkgconfig
 131         list<string> argv;
 132         argv.push_back("pkg-config");
 133         argv.push_back("--variable=source");
 134         argv.push_back(n);
 135         string srcdir=strip(run_command(argv));
 136
 137         PathList dirs;
 138         if(!srcdir.empty())
 139                 dirs.push_back(srcdir);
 140
 141         // Make some other guesses about the source directory
 142         string dirname=n;
 143         if(!dirname.compare(0, 3, "msp"))
 144                 dirname.erase(0, 3);
 145         dirs.push_back(cwd/dirname);
 146         dirs.push_back(cwd/".."/dirname);
 147
 148         // Go through the candidate directories and look for a Build file
 149         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 150                 if(!load_build_file(*j/"Build"))
 151                 {
 152                         i=packages.find(n);
 153                         if(i!=packages.end())
 154                                 return i->second;
 155                         break;
 156                 }
 157
 158         // Package source not found - create a binary package
 159         Package *pkg=Package::create(*this, n);
 160         packages.insert(PackageMap::value_type(n, pkg));
 161         if(pkg)
 162                 new_pkgs.push_back(pkg);
 163
 164         return pkg;
 165 }
 166
 167 /**
 168 Returns the target with the given name, or 0 if no such target exists.
 169 */
 170 Target *Builder::get_target(const string &n)
 171 {
 172         TargetMap::iterator i=targets.find(n);
 173         if(i!=targets.end())
 174                 return i->second;
 175         return 0;
 176 }
 177
 178 /**
 179 Tries to locate a header included from a given location and with a given include
 180 path.  Considers known targets as well as existing files.  If a matching target
 181 is not found but a file exists, a new SystemHeader target will be created and
 182 returned.
 183 */
 184 Target *Builder::get_header(const string &include, const string &from, const list<string> &path)
 185 {
 186         string hash(8, 0);
 187         update_hash(hash, from);
 188         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 189                 update_hash(hash, *i);
 190
 191         string id=hash+include;
 192         TargetMap::iterator i=includes.find(id);
 193         if(i!=includes.end())
 194                 return i->second;
 195
 196         string fn=include.substr(1);
 197         Target *tgt=0;
 198         if(include[0]=='"' && (tgt=get_header(Path::Path(from)/fn)))
 199                 ;
 200         else if((tgt=get_header(Path::Path("/usr/include")/fn)))
 201                 ;
 202         //XXX Determine the C++ header location dynamically
 203         else if((tgt=get_header(Path::Path("/usr/include/c++/4.1.2")/fn)))
 204                 ;
 205         else
 206         {
 207                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 208                         tgt=get_header(cwd/ *j/fn);
 209         }
 210
 211         includes.insert(TargetMap::value_type(id, tgt));
 212
 213         return tgt;
 214 }
 215
 216 /**
 217 Tries to locate a library with the given library path.  Considers known targets
 218 as well as existing files.  If a matching target is not found but a file exists,
 219 a new SystemLibrary target will be created and returned.
 220
 221 @param   lib   Name of the library to get (without "lib" prefix or extension)
 222 @param   path  List of paths to search for the library
 223 @param   mode  Shared / static mode
 224
 225 @return  Some kind of library target, if a match was found
 226 */
 227 Target *Builder::get_library(const string &lib, const list<string> &path, LibMode mode)
 228 {
 229         string hash(8, 0);
 230         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 231                 update_hash(hash, *i);
 232
 233         //XXX Incorporate mode into id
 234         string id=hash+lib;
 235         TargetMap::iterator i=libraries.find(id);
 236         if(i!=libraries.end())
 237                 return i->second;
 238
 239         Target *tgt=0;
 240         if((tgt=get_library(lib, "/lib", mode)))
 241                 ;
 242         else if((tgt=get_library(lib, "/usr/lib", mode)))
 243                 ;
 244         else
 245         {
 246                 for(list<string>::const_iterator j=path.begin(); (j!=path.end() && !tgt); ++j)
 247                         tgt=get_library(lib, cwd/ *j, mode);
 248         }
 249
 250         libraries.insert(TargetMap::value_type(id, tgt));
 251
 252         return tgt;
 253 }
 254
 255 const string &Builder::get_arch_prefix(const string &arch) const
 256 {
 257         StringMap::const_iterator i=archs.find(arch);
 258         if(i==archs.end())
 259                 throw InvalidParameterValue("Unknown architecture");
 260
 261         return i->second;
 262 }
 263
 264 string Builder::get_tool(const std::string &tool, const std::string &arch)
 265 {
 266         ToolMap::iterator i=tools.find(arch);
 267         if(i!=tools.end())
 268         {
 269                 StringMap::iterator j=i->second.find(tool);
 270                 if(j!=i->second.end())
 271                         return j->second;
 272         }
 273
 274         // Either the arch, or the tool within the arch was not found
 275         i=tools.find("native");
 276         StringMap::iterator j=i->second.find(tool);
 277         if(j==i->second.end())
 278                 throw InvalidParameterValue("Unknown tool");
 279
 280         return get_arch_prefix(arch)+j->second;
 281 }
 282
 283 int Builder::main()
 284 {
 285         if(load_build_file(cwd/build_file))
 286         {
 287                 cerr<<"No build info here.\n";
 288                 return 1;
 289         }
 290
 291         default_pkg=packages.begin()->second;
 292
 293         while(!new_pkgs.empty())
 294         {
 295                 Package *pkg=new_pkgs.front();
 296                 new_pkgs.erase(new_pkgs.begin());
 297                 pkg->resolve_refs();
 298         }
 299
 300         default_pkg->configure(cmdline_options, conf_all?2:1);
 301
 302         if(help)
 303         {
 304                 usage(0, "builder", false);
 305                 cout<<'\n';
 306                 package_help();
 307                 return 0;
 308         }
 309
 310         StringMap problems;
 311         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 312         {
 313                 string prob;
 314                 if(!i->second)
 315                         prob="missing";
 316                 else if(i->second->get_buildable() && i->second->get_arch()!=default_pkg->get_arch())
 317                         prob="wrong architecture ("+i->second->get_arch()+")";
 318                 if(!prob.empty())
 319                         problems.insert(StringMap::value_type(i->first, prob));
 320         }
 321
 322         if(!problems.empty())
 323         {
 324                 cerr<<"The following problems were detected:\n";
 325                 for(StringMap::iterator i=problems.begin(); i!=problems.end(); ++i)
 326                         cerr<<"  "<<i->first<<": "<<i->second<<'\n';
 327                 cerr<<"Please fix them and try again.\n";
 328                 return 1;
 329         }
 330
 331         if(conf_only)
 332                 return 0;
 333
 334         if(create_targets())
 335                 return 1;
 336
 337         cout<<packages.size()<<" packages, "<<targets.size()<<" targets\n";
 338         if(verbose>=2)
 339         {
 340                 for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 341                 {
 342                         cout<<' '<<i->second->get_name();
 343                         if(i->second->get_buildable())
 344                                 cout<<'*';
 345                         unsigned count=0;
 346                         unsigned ood_count=0;
 347                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 348                                 if(j->second->get_package()==i->second)
 349                                 {
 350                                         ++count;
 351                                         if(j->second->get_rebuild())
 352                                                 ++ood_count;
 353                                 }
 354                         if(count)
 355                         {
 356                                 cout<<" ("<<count<<" targets";
 357                                 if(ood_count)
 358                                         cout<<", "<<ood_count<<" out-of-date";
 359                                 cout<<')';
 360                         }
 361                         cout<<'\n';
 362                 }
 363         }
 364
 365         if(analyzer)
 366                 analyzer->analyze();
 367
 368         if(do_build)
 369                 build();
 370
 371         return exit_code;
 372 }
 373
 374 Builder::~Builder()
 375 {
 376         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 377                 delete i->second;
 378         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 379                 delete i->second;
 380         delete analyzer;
 381 }
 382
 383 void Builder::usage(const char *reason, const char *argv0, bool brief)
 384 {
 385         if(reason)
 386                 cerr<<reason<<'\n';
 387
 388         if(brief)
 389                 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> ...]";
 390         else
 391         {
 392                 cerr<<
 393                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 394                         "\n"
 395                         "Options:\n"
 396                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 397                         "  -b, --build         Perform build even if doing analysis.\n"
 398                         "  -c, --clean         Clean buildable targets.\n"
 399                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 400                         "  -h, --help          Print this message.\n"
 401                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 402                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 403                         "  -v, --verbose       Print more information about what's going on.\n"
 404                         "  -A, --conf-all      Apply configuration to all packages.\n"
 405                         "  -B, --build-all     Build all targets unconditionally.\n"
 406                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 407                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 408                         "  --chrome            Use extra chrome to print status.\n"
 409                         "  --conf-only         Stop after configuring packages.\n"
 410                         "  --full-paths        Output full paths in analysis.\n"
 411                         "  --max-depth NUM     Maximum depth to show in analysis.\n";
 412         }
 413 }
 414
 415 /**
 416 Loads the given build file.
 417
 418 @param   fn  Path to the file
 419
 420 @return  0 on success, -1 if the file could not be opened
 421 */
 422 int Builder::load_build_file(const Path::Path &fn)
 423 {
 424         ifstream in(fn.str().c_str());
 425         if(!in)
 426                 return -1;
 427
 428         Parser::Parser parser(in, fn.str());
 429         Loader loader(*this, fn.subpath(0, fn.size()-1));
 430         loader.load(parser);
 431
 432         return 0;
 433 }
 434
 435 /**
 436 Creates targets for all packages and prepares them for building.
 437
 438 @return  0 if everything went ok, -1 if something bad happened and a build
 439          shouldn't be attempted
 440 */
 441 int Builder::create_targets()
 442 {
 443         Target *world=new VirtualTarget(*this, "world");
 444         add_target(world);
 445
 446         Target *def_tgt=new VirtualTarget(*this, "default");
 447         add_target(def_tgt);
 448         world->add_depend(def_tgt);
 449
 450         Target *install=new VirtualTarget(*this, "install");
 451         add_target(install);
 452         world->add_depend(install);
 453
 454         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 455         {
 456                 if(!i->second)
 457                         continue;
 458                 if(!i->second->get_buildable())
 459                         continue;
 460
 461                 Path::Path inst_base;
 462                 if(i->second->get_buildable() && i->second->get_install_flags())
 463                         inst_base=i->second->get_prefix();
 464
 465                 const ComponentList &components=i->second->get_components();
 466                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 467                 {
 468                         // Collect all files belonging to the component
 469                         PathList files;
 470                         const PathList &sources=j->get_sources();
 471                         for(PathList::const_iterator k=sources.begin(); k!=sources.end(); ++k)
 472                         {
 473                                 struct stat st;
 474                                 stat(*k, st);
 475                                 if(S_ISDIR(st.st_mode))
 476                                 {
 477                                         list<string> sfiles=list_files(*k);
 478                                         for(list<string>::iterator l=sfiles.begin(); l!=sfiles.end(); ++l)
 479                                                 files.push_back(*k / *l);
 480                                 }
 481                                 else
 482                                         files.push_back(*k);
 483                         }
 484
 485                         bool build_exe=j->get_type()!=Component::HEADERS;
 486
 487                         list<ObjectFile *> objs;
 488                         for(PathList::iterator k=files.begin(); k!=files.end(); ++k)
 489                         {
 490                                 string basename=(*k)[-1];
 491                                 string ext=Path::splitext(basename).ext;
 492                                 if((ext==".cpp" || ext==".c") && build_exe)
 493                                 {
 494                                         SourceFile *src=new SourceFile(*this, &*j, k->str());
 495                                         add_target(src);
 496
 497                                         // Compile sources
 498                                         ObjectFile *obj=new ObjectFile(*this, *j, *src);
 499                                         add_target(obj);
 500                                         objs.push_back(obj);
 501                                 }
 502                                 else if(ext==".h")
 503                                 {
 504                                         Target *hdr=get_target(k->str());
 505                                         if(!hdr)
 506                                         {
 507                                                 hdr=new Header(*this, &*j, k->str());
 508                                                 add_target(hdr);
 509                                         }
 510
 511                                         // Install headers if requested
 512                                         if(!j->get_install_headers().empty())
 513                                         {
 514                                                 Path::Path inst_path=inst_base/"include"/j->get_install_headers()/basename;
 515                                                 Install *inst=new Install(*this, *i->second, *hdr, inst_path.str());
 516                                                 add_target(inst);
 517                                                 install->add_depend(inst);
 518                                         }
 519                                 }
 520                         }
 521
 522                         if(build_exe)
 523                         {
 524                                 Executable    *exe=0;
 525                                 StaticLibrary *slib=0;
 526                                 if(j->get_type()==Component::LIBRARY)
 527                                 {
 528                                         exe=new SharedLibrary(*this, *j, objs);
 529                                         slib=new StaticLibrary(*this, *j, objs);
 530                                         add_target(slib);
 531                                 }
 532                                 else
 533                                         exe=new Executable(*this, *j, objs);
 534
 535                                 add_target(exe);
 536                                 if(i->second==default_pkg)
 537                                 {
 538                                         def_tgt->add_depend(exe);
 539                                         if(slib) def_tgt->add_depend(slib);
 540                                 }
 541                                 else
 542                                 {
 543                                         world->add_depend(exe);
 544                                         if(slib) world->add_depend(slib);
 545                                 }
 546
 547                                 if(j->get_install())
 548                                 {
 549                                         string inst_dir;
 550                                         if(j->get_type()==Component::PROGRAM)
 551                                                 inst_dir="bin";
 552                                         else if(j->get_type()==Component::LIBRARY)
 553                                                 inst_dir="lib";
 554                                         if(!inst_dir.empty())
 555                                         {
 556                                                 Install *inst=new Install(*this, *i->second, *exe, (inst_base/inst_dir/Path::basename(exe->get_name())).str());
 557                                                 add_target(inst);
 558                                                 install->add_depend(inst);
 559
 560                                                 if(slib)
 561                                                 {
 562                                                         inst=new Install(*this, *i->second, *slib, (inst_base/inst_dir/Path::basename(slib->get_name())).str());
 563                                                         add_target(inst);
 564                                                         install->add_depend(inst);
 565                                                 }
 566                                         }
 567                                 }
 568                         }
 569                 }
 570
 571                 if(i->second->get_install_flags()&(Package::LIB|Package::INCLUDE))
 572                 {
 573                         PkgConfig *pc=new PkgConfig(*this, *i->second);
 574                         add_target(pc);
 575                         Install *inst=new Install(*this, *i->second, *pc, (inst_base/"lib"/"pkgconfig"/Path::basename(pc->get_name())).str());
 576                         add_target(inst);
 577                         install->add_depend(inst);
 578                 }
 579         }
 580
 581         // Find dependencies until no new targets are created
 582         while(!new_tgts.empty())
 583         {
 584                 Target *tgt=new_tgts.front();
 585                 new_tgts.erase(new_tgts.begin());
 586                 tgt->find_depends();
 587                 if(!tgt->get_depends_ready())
 588                         new_tgts.push_back(tgt);
 589         }
 590
 591         // Apply what-ifs
 592         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 593         {
 594                 Target *tgt=get_target((cwd/ *i).str());
 595                 if(!tgt)
 596                 {
 597                         cerr<<"Unknown what-if target "<<*i<<'\n';
 598                         return -1;
 599                 }
 600                 tgt->touch();
 601         }
 602
 603         // Make the cmdline target depend on all targets mentioned on the command line
 604         Target *cmdline=new VirtualTarget(*this, "cmdline");
 605         add_target(cmdline);
 606         world->add_depend(cmdline);
 607         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 608         {
 609                 Target *tgt=get_target(*i);
 610                 if(!tgt)
 611                         tgt=get_target((cwd/ *i).str());
 612                 if(!tgt)
 613                 {
 614                         cerr<<"I don't know anything about "<<*i<<'\n';
 615                         return -1;
 616                 }
 617                 cmdline->add_depend(tgt);
 618         }
 619
 620         world->prepare();
 621
 622         return 0;
 623 }
 624
 625 /**
 626 Check if a header exists, either as a target or a file.  Either an existing
 627 target or a new SystemHeader target will be returned.
 628 */
 629 Target *Builder::get_header(const Msp::Path::Path &fn)
 630 {
 631         Target *tgt=get_target(fn.str());
 632         if(tgt) return tgt;
 633
 634         if(Path::exists(fn))
 635         {
 636                 add_target(tgt=new SystemHeader(*this, fn.str()));
 637                 return tgt;
 638         }
 639         return 0;
 640 }
 641
 642 Target *Builder::get_library(const string &lib, const Path::Path &path, LibMode mode)
 643 {
 644         string full;
 645         if(mode!=DYNAMIC)
 646         {
 647                 full=(path/("lib"+lib+".a")).str();
 648                 Target *tgt=get_target(full);
 649                 // Targets can only be associated with buildable packages (or no package at all)
 650                 if(tgt && (tgt->get_package() || mode==ALL_STATIC)) return tgt;
 651         }
 652         if(mode!=ALL_STATIC)
 653         {
 654                 full=(path/("lib"+lib+".so")).str();
 655                 Target *tgt=get_target(full);
 656                 if(tgt) return tgt;
 657         }
 658
 659         if(Path::exists(full))
 660         {
 661                 Target *tgt=new SystemLibrary(*this, full);
 662                 add_target(tgt);
 663                 return tgt;
 664         }
 665
 666         return 0;
 667 }
 668
 669 /**
 670 Adds a target to both the target map and the new target queue.
 671 */
 672 void Builder::add_target(Target *t)
 673 {
 674         targets.insert(TargetMap::value_type(t->get_name(), t));
 675         new_tgts.push_back(t);
 676 }
 677
 678 /**
 679 Updates a hash with a string.  This is used from get_header and get_library.
 680 */
 681 void Builder::update_hash(string &hash, const string &value)
 682 {
 683         for(unsigned i=0; i<value.size(); ++i)
 684                 hash[i%hash.size()]^=value[i];
 685 }
 686
 687 /**
 688 This function supervises the build process, starting new actions when slots
 689 become available.
 690 */
 691 int Builder::build()
 692 {
 693         Target *cmdline=get_target("cmdline");
 694
 695         unsigned total=cmdline->count_rebuild();
 696         if(!total)
 697         {
 698                 cout<<"Already up to date\n";
 699                 return 0;
 700         }
 701         cout<<"Will build "<<total<<" target(s)\n";
 702
 703         vector<Action *> actions;
 704
 705         if(chrome)
 706                 cout<<"0 targets built\n";
 707         unsigned count=0;
 708
 709         bool fail=false;
 710         bool finish=false;
 711
 712         while(!finish)
 713         {
 714                 if(actions.size()<jobs && !fail)
 715                 {
 716                         Target *tgt=cmdline->get_buildable_target();
 717                         if(tgt)
 718                         {
 719                                 Action *action=tgt->build();
 720                                 if(action)
 721                                         actions.push_back(action);
 722                         }
 723                         else if(actions.empty())
 724                                 finish=true;
 725                 }
 726                 else
 727                         Time::sleep(10*Time::msec);
 728
 729                 for(unsigned i=0; i<actions.size();)
 730                 {
 731                         int status=actions[i]->check();
 732                         if(status>=0)
 733                         {
 734                                 ++count;
 735                                 if(chrome)
 736                                 {
 737                                         cout<<"\e["<<actions.size()+1<<'A';
 738                                         cout<<count<<" targets built\n";
 739                                         if(i)
 740                                                 cout<<"\e["<<i<<"B";
 741                                         cout<<"\e[M";
 742                                         if(i<actions.size()-1)
 743                                                 cout<<"\e["<<actions.size()-i-1<<"B";
 744                                         cout.flush();
 745                                 }
 746                                 delete actions[i];
 747                                 actions.erase(actions.begin()+i);
 748                                 if(status>0)
 749                                         fail=true;
 750                                 if(actions.empty() && fail)
 751                                         finish=true;
 752                         }
 753                         else
 754                                 ++i;
 755                 }
 756         }
 757
 758         if(fail)
 759                 cout<<"Build failed\n";
 760
 761         return fail?-1:0;
 762 }
 763
 764 /**
 765 Prints out information about the default package.
 766 */
 767 void Builder::package_help()
 768 {
 769         const Config &config=default_pkg->get_config();
 770         const Config::OptionMap &options=config.get_options();
 771
 772         cout<<"Required packages:\n  ";
 773         const PkgRefList &requires=default_pkg->get_requires();
 774         for(PkgRefList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 775         {
 776                 if(i!=requires.begin())
 777                         cout<<", ";
 778                 cout<<i->get_name();
 779         }
 780         cout<<"\n\n";
 781         cout<<"Package configuration:\n";
 782         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 783         {
 784                 const Config::Option &opt=i->second;
 785                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 786         }
 787 }
 788
 789 Application::RegApp<Builder> Builder::reg;
 790
 791 Builder::Loader::Loader(Builder &b, const Path::Path &s):
 792         bld(b),
 793         src(s)
 794 {
 795         add("package", &Loader::package);
 796 }
 797
 798 void Builder::Loader::package(const string &n)
 799 {
 800         Package *pkg=new Package(bld, n, src);
 801         load_sub(*pkg);
 802         bld.packages.insert(PackageMap::value_type(n, pkg));
 803         bld.new_pkgs.push_back(pkg);
 804 }
 805