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 <iostream>
   9 #include <set>
  10 #include <msp/core/except.h>
  11 #include <msp/core/getopt.h>
  12 #include <msp/datafile/parser.h>
  13 #include <msp/fs/dir.h>
  14 #include <msp/fs/stat.h>
  15 #include <msp/fs/utils.h>
  16 #include <msp/io/buffered.h>
  17 #include <msp/io/except.h>
  18 #include <msp/io/file.h>
  19 #include <msp/strings/formatter.h>
  20 #include <msp/strings/regex.h>
  21 #include <msp/strings/utils.h>
  22 #include <msp/time/units.h>
  23 #include <msp/time/utils.h>
  24 #include "action.h"
  25 #include "analyzer.h"
  26 #include "binarypackage.h"
  27 #include "builder.h"
  28 #include "header.h"
  29 #include "install.h"
  30 #include "misc.h"
  31 #include "package.h"
  32 #include "pkgconfig.h"
  33 #include "sharedlibrary.h"
  34 #include "sourcepackage.h"
  35 #include "systemlibrary.h"
  36 #include "tarball.h"
  37 #include "unlink.h"
  38 #include "virtualtarget.h"
  39
  40 using namespace std;
  41 using namespace Msp;
  42
  43 Builder::Builder(int argc, char **argv):
  44         main_pkg(0),
  45         analyzer(0),
  46         build(false),
  47         clean(0),
  48         dry_run(false),
  49         help(false),
  50         verbose(1),
  51         show_progress(false),
  52         build_file("Build"),
  53         jobs(1),
  54         conf_all(false),
  55         conf_only(false),
  56         build_all(false),
  57         create_makefile(false),
  58         current_arch("native")
  59 {
  60         string   analyze_mode;
  61         string   work_dir;
  62         bool     full_paths=false;
  63         unsigned max_depth=5;
  64         StringList cmdline_warn;
  65         string   prfx;
  66
  67         GetOpt getopt;
  68         getopt.add_option('a', "analyze",    analyze_mode, GetOpt::REQUIRED_ARG);
  69         getopt.add_option('b', "build",      build,        GetOpt::NO_ARG);
  70         getopt.add_option('c', "clean",      clean,        GetOpt::NO_ARG);
  71         getopt.add_option('f', "file",       build_file,   GetOpt::REQUIRED_ARG);
  72         getopt.add_option('h', "help",       help,         GetOpt::NO_ARG);
  73         getopt.add_option('j', "jobs",       jobs,         GetOpt::REQUIRED_ARG);
  74         getopt.add_option('n', "dry-run",    dry_run,      GetOpt::NO_ARG);
  75         getopt.add_option('v', "verbose",    verbose,      GetOpt::NO_ARG);
  76         getopt.add_option('A', "conf-all",   conf_all,     GetOpt::NO_ARG);
  77         getopt.add_option('B', "build-all",  build_all,    GetOpt::NO_ARG);
  78         getopt.add_option('C', "chdir",      work_dir,     GetOpt::REQUIRED_ARG);
  79         getopt.add_option('P', "progress",   show_progress, GetOpt::NO_ARG);
  80         getopt.add_option('W', "what-if",    what_if,      GetOpt::REQUIRED_ARG);
  81         getopt.add_option(     "arch",       current_arch, GetOpt::REQUIRED_ARG);
  82         getopt.add_option(     "conf-only",  conf_only,    GetOpt::NO_ARG);
  83         getopt.add_option(     "full-paths", full_paths,   GetOpt::NO_ARG);
  84         //getopt.add_option(     "makefile",   create_makefile, GetOpt::NO_ARG);
  85         getopt.add_option(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  86         getopt.add_option(     "prefix",     prfx,         GetOpt::REQUIRED_ARG);
  87         getopt.add_option(     "warnings",   cmdline_warn, GetOpt::REQUIRED_ARG);
  88         getopt(argc, argv);
  89
  90         if(!analyze_mode.empty())
  91         {
  92                 analyzer=new Analyzer(*this);
  93
  94                 if(analyze_mode=="deps")
  95                         analyzer->set_mode(Analyzer::DEPS);
  96                 else if(analyze_mode=="alldeps")
  97                         analyzer->set_mode(Analyzer::ALLDEPS);
  98                 else if(analyze_mode=="rebuild")
  99                         analyzer->set_mode(Analyzer::REBUILD);
 100                 else if(analyze_mode=="rdeps")
 101                         analyzer->set_mode(Analyzer::RDEPS);
 102                 else
 103                         throw UsageError("Invalid analyze mode");
 104
 105                 analyzer->set_max_depth(max_depth);
 106                 analyzer->set_full_paths(full_paths);
 107         }
 108         else if(!clean && !create_makefile)
 109                 build=true;
 110
 111         const vector<string> &args=getopt.get_args();
 112         for(vector<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
 113         {
 114                 unsigned equal=i->find('=');
 115                 if(equal!=string::npos)
 116                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 117                 else
 118                         cmdline_targets.push_back(*i);
 119         }
 120
 121         if(cmdline_targets.empty())
 122                 cmdline_targets.push_back("default");
 123
 124         if(!work_dir.empty())
 125                 chdir(work_dir.c_str());
 126
 127         cwd=FS::getcwd();
 128
 129         Architecture &native_arch=archs.insert(ArchMap::value_type("native", Architecture(*this, "native"))).first->second;
 130         native_arch.set_tool("CC",  "gcc");
 131         native_arch.set_tool("CXX", "g++");
 132         native_arch.set_tool("LD",  "gcc");
 133         native_arch.set_tool("LXX", "g++");
 134         native_arch.set_tool("AR",  "ar");
 135
 136         load_build_file((FS::get_home_dir()/".builderrc").str());
 137
 138         if(prfx.empty())
 139         {
 140                 if(current_arch=="native")
 141                         prefix=(FS::get_home_dir()/"local").str();
 142                 else
 143                         prefix=(FS::get_home_dir()/"local"/current_arch).str();
 144         }
 145         else
 146                 prefix=prfx;
 147
 148         warnings.push_back("all");
 149         warnings.push_back("extra");
 150         warnings.push_back("shadow");
 151         warnings.push_back("pointer-arith");
 152         warnings.push_back("error");
 153         for(StringList::iterator i=cmdline_warn.begin(); i!=cmdline_warn.end(); ++i)
 154         {
 155                 vector<string> warns=split(*i, ',');
 156                 warnings.insert(warnings.end(), warns.begin(), warns.end());
 157         }
 158 }
 159
 160 /**
 161 Gets a package by name, possibly creating it.
 162
 163 @param   name  Package name
 164
 165 @return  Pointer to the package, or 0 if the package could not be located
 166 */
 167 Package *Builder::get_package(const string &name)
 168 {
 169         PackageMap::iterator i=packages.find(format("%s/%s", name, current_arch));
 170         if(i==packages.end())
 171                 i=packages.find(name);
 172         if(i!=packages.end())
 173                 return i->second;
 174
 175         // Try to get source directory with pkgconfig
 176         list<string> argv;
 177         argv.push_back("pkg-config");
 178         argv.push_back("--variable=source");
 179         argv.push_back(name);
 180         if(verbose>=4)
 181                 cout<<"Running "<<join(argv.begin(), argv.end())<<'\n';
 182         string srcdir=strip(run_command(argv));
 183
 184         PathList dirs;
 185         if(!srcdir.empty())
 186                 dirs.push_back(srcdir);
 187
 188         // Make some other guesses about the source directory
 189         dirs.push_back(cwd/name);
 190         dirs.push_back(cwd/".."/name);
 191         if(!name.compare(0, 3, "msp"))
 192         {
 193                 dirs.push_back(cwd/name.substr(3));
 194                 dirs.push_back(cwd/".."/name.substr(3));
 195         }
 196
 197         // Go through the candidate directories and look for a Build file
 198         for(PathList::iterator j=dirs.begin(); j!=dirs.end(); ++j)
 199                 if(!load_build_file(*j/"Build"))
 200                 {
 201                         i=packages.find(name);
 202                         if(i!=packages.end())
 203                                 return i->second;
 204                         break;
 205                 }
 206
 207         // Package source not found - create a binary package
 208         Package *pkg=BinaryPackage::from_pkgconfig(*this, name);
 209
 210         packages.insert(PackageMap::value_type(name, pkg));
 211
 212         if(!pkg)
 213                 problem(name, "not found");
 214
 215         return pkg;
 216 }
 217
 218 /**
 219 Returns the target with the given name, or 0 if no such target exists.
 220 */
 221 Target *Builder::get_target(const string &n) const
 222 {
 223         TargetMap::const_iterator i=targets.find(n);
 224         if(i!=targets.end())
 225                 return i->second;
 226         return 0;
 227 }
 228
 229 /**
 230 Tries to locate a header included from a given location and with a given include
 231 path.  Considers known targets as well as existing files.  If a matching target
 232 is not found but a file exists, a new SystemHeader target will be created and
 233 returned.
 234 */
 235 Target *Builder::get_header(const string &include, const string &from, const list<string> &path)
 236 {
 237         string hash(8, 0);
 238         update_hash(hash, from);
 239         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 240                 update_hash(hash, *i);
 241
 242         string id=hash+include;
 243         TargetMap::iterator i=includes.find(id);
 244         if(i!=includes.end())
 245                 return i->second;
 246
 247         static string cxx_ver;
 248         if(cxx_ver.empty())
 249         {
 250                 StringList argv;
 251                 argv.push_back(get_current_arch().get_tool("CXX"));
 252                 argv.push_back("--version");
 253                 cxx_ver=Regex("[0-9]\\.[0-9.]+").match(run_command(argv))[0].str;
 254                 while(!cxx_ver.empty() && !FS::is_dir(FS::Path("/usr/include/c++")/cxx_ver))
 255                 {
 256                         unsigned dot=cxx_ver.rfind('.');
 257                         if(dot==string::npos)
 258                                 break;
 259                         cxx_ver.erase(dot);
 260                 }
 261                 if(verbose>=5)
 262                         cout<<"C++ version is "<<cxx_ver<<'\n';
 263         }
 264
 265         string fn=include.substr(1);
 266         if(verbose>=5)
 267                 cout<<"Looking for include "<<fn<<" with path "<<join(path.begin(), path.end())<<'\n';
 268
 269         StringList syspath;
 270         if(current_arch=="native")
 271                 syspath.push_back("/usr/include");
 272         else
 273                 syspath.push_back("/usr/"+get_architecture(current_arch).get_prefix()+"/include");
 274         syspath.push_back((FS::Path("/usr/include/c++/")/cxx_ver/fn).str());
 275
 276         Target *tgt=0;
 277         if(include[0]=='\"')
 278                 tgt=get_header(FS::Path(from)/fn);
 279         for(list<string>::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 280                 tgt=get_header(cwd/ *j/fn);
 281         for(list<string>::const_iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 282                 tgt=get_header(FS::Path(*j)/fn);
 283
 284         includes.insert(TargetMap::value_type(id, tgt));
 285
 286         return tgt;
 287 }
 288
 289 /**
 290 Tries to locate a library with the given library path.  Considers known targets
 291 as well as existing files.  If a matching target is not found but a file exists,
 292 a new SystemLibrary target will be created and returned.
 293
 294 @param   lib   Name of the library to get (without "lib" prefix or extension)
 295 @param   path  List of paths to search for the library
 296 @param   mode  Shared / static mode
 297
 298 @return  Some kind of library target, if a match was found
 299 */
 300 Target *Builder::get_library(const string &lib, const list<string> &path, LibMode mode)
 301 {
 302         string hash(8, 0);
 303         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 304                 update_hash(hash, *i);
 305
 306         string id=hash+string(1, mode)+lib;
 307         TargetMap::iterator i=libraries.find(id);
 308         if(i!=libraries.end())
 309                 return i->second;
 310
 311         StringList syspath;
 312         if(current_arch=="native")
 313         {
 314                 syspath.push_back("/lib");
 315                 syspath.push_back("/usr/lib");
 316         }
 317         else
 318                 syspath.push_back("/usr/"+get_current_arch().get_prefix()+"/lib");
 319
 320         if(verbose>=5)
 321                 cout<<"Looking for library "<<lib<<" with path "<<join(path.begin(), path.end())<<'\n';
 322
 323         Target *tgt=0;
 324         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 325                 tgt=get_library(lib, cwd/ *j, mode);
 326         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 327                 tgt=get_library(lib, *j, mode);
 328
 329         libraries.insert(TargetMap::value_type(id, tgt));
 330
 331         return tgt;
 332 }
 333
 334 const Architecture &Builder::get_architecture(const string &arch) const
 335 {
 336         ArchMap::const_iterator i=archs.find(arch);
 337         if(i==archs.end())
 338                 throw KeyError("Unknown architecture", arch);
 339
 340         return i->second;
 341 }
 342
 343 const Architecture &Builder::get_current_arch() const
 344 {
 345         return get_architecture(current_arch);
 346 }
 347
 348 void Builder::apply_profile_template(Config &config, const string &pt) const
 349 {
 350         vector<string> parts=split(pt, '-');
 351
 352         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 353         {
 354                 ProfileTemplateMap::const_iterator j=profile_tmpl.find(*i);
 355                 if(j==profile_tmpl.end())
 356                         continue;
 357
 358                 config.update(j->second);
 359         }
 360 }
 361
 362 void Builder::problem(const string &p, const string &d)
 363 {
 364         problems.push_back(Problem(p, d));
 365 }
 366
 367 /**
 368 Adds a target to both the target map and the new target queue.  Called from
 369 Target constructor.
 370 */
 371 void Builder::add_target(Target *t)
 372 {
 373         targets.insert(TargetMap::value_type(t->get_name(), t));
 374         new_tgts.push_back(t);
 375 }
 376
 377 int Builder::main()
 378 {
 379         if(load_build_file(cwd/build_file))
 380         {
 381                 cerr<<"No build info here.\n";
 382                 return 1;
 383         }
 384
 385         main_pkg->configure(cmdline_options, conf_all?2:1);
 386
 387         if(help)
 388         {
 389                 usage(0, "builder", false);
 390                 cout<<'\n';
 391                 package_help();
 392                 return 0;
 393         }
 394
 395         if(!conf_only && create_targets())
 396                 return 1;
 397
 398         PackageList all_reqs=main_pkg->collect_requires();
 399
 400         if(conf_only)
 401                 return 0;
 402
 403         cout<<all_reqs.size()<<" active packages, "<<targets.size()<<" targets\n";
 404         if(verbose>=2)
 405         {
 406                 for(PackageList::const_iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 407                 {
 408                         cout<<' '<<(*i)->get_name();
 409                         if(dynamic_cast<SourcePackage *>(*i))
 410                                 cout<<'*';
 411                         unsigned count=0;
 412                         unsigned ood_count=0;
 413                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 414                                 if(j->second->get_package()==*i)
 415                                 {
 416                                         ++count;
 417                                         if(j->second->get_rebuild())
 418                                                 ++ood_count;
 419                                 }
 420                         if(count)
 421                         {
 422                                 cout<<" ("<<count<<" targets";
 423                                 if(ood_count)
 424                                         cout<<", "<<ood_count<<" out-of-date";
 425                                 cout<<')';
 426                         }
 427                         cout<<'\n';
 428                 }
 429         }
 430
 431         if(analyzer)
 432                 analyzer->analyze();
 433
 434         if(!problems.empty())
 435         {
 436                 cerr<<"The following problems were detected:\n";
 437                 for(ProblemList::iterator i=problems.begin(); i!=problems.end(); ++i)
 438                         cerr<<"  "<<i->package<<": "<<i->descr<<'\n';
 439                 cerr<<"Please fix them and try again.\n";
 440                 return 1;
 441         }
 442
 443         //if(create_makefile
 444
 445         if(clean)
 446                 exit_code=do_clean();
 447         else if(build)
 448                 exit_code=do_build();
 449
 450         return exit_code;
 451 }
 452
 453 Builder::~Builder()
 454 {
 455         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 456                 delete i->second;
 457         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 458                 delete i->second;
 459         delete analyzer;
 460 }
 461
 462 void Builder::usage(const char *reason, const char *argv0, bool brief)
 463 {
 464         if(reason)
 465                 cerr<<reason<<'\n';
 466
 467         if(brief)
 468                 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> ...]\n";
 469         else
 470         {
 471                 cerr<<
 472                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 473                         "\n"
 474                         "Options:\n"
 475                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 476                         "  -b, --build         Perform build even if doing analysis.\n"
 477                         "  -c, --clean         Clean buildable targets.\n"
 478                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 479                         "  -h, --help          Print this message.\n"
 480                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 481                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 482                         "  -v, --verbose       Print more information about what's going on.\n"
 483                         "  -A, --conf-all      Apply configuration to all packages.\n"
 484                         "  -B, --build-all     Build all targets unconditionally.\n"
 485                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 486                         "  -P, --progress      Display progress while building.\n"
 487                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 488                         "  --arch ARCH         Architecture to build for.\n"
 489                         "  --conf-only         Stop after configuring packages.\n"
 490                         "  --full-paths        Output full paths in analysis.\n"
 491                         //"  --makefile          Create a makefile for this package.\n"
 492                         "  --max-depth NUM     Maximum depth to show in analysis.\n"
 493                         "  --prefix DIR        Directory to install things to.\n"
 494                         "  --warnings LIST     Compiler warnings to use.\n";
 495         }
 496 }
 497
 498 /**
 499 Loads the given build file.
 500
 501 @param   fn  Path to the file
 502
 503 @return  0 on success, -1 if the file could not be opened
 504 */
 505 int Builder::load_build_file(const FS::Path &fn)
 506 {
 507         try
 508         {
 509                 IO::File inf(fn.str());
 510                 IO::Buffered in(inf);
 511
 512                 if(verbose>=3)
 513                         cout<<"Reading "<<fn<<'\n';
 514
 515                 DataFile::Parser parser(in, fn.str());
 516                 Loader loader(*this, fn.subpath(0, fn.size()-1));
 517                 loader.load(parser);
 518         }
 519         catch(const IO::FileNotFound &)
 520         {
 521                 return -1;
 522         }
 523
 524         return 0;
 525 }
 526
 527 /**
 528 Creates targets for all packages and prepares them for building.
 529
 530 @return  0 if everything went ok, -1 if something bad happened and a build
 531          shouldn't be attempted
 532 */
 533 int Builder::create_targets()
 534 {
 535         Target *world=new VirtualTarget(*this, "world");
 536
 537         Target *def_tgt=new VirtualTarget(*this, "default");
 538         world->add_depend(def_tgt);
 539
 540         Target *install=new VirtualTarget(*this, "install");
 541         world->add_depend(install);
 542
 543         Target *tarballs=new VirtualTarget(*this, "tarballs");
 544         world->add_depend(tarballs);
 545
 546         PackageList all_reqs=main_pkg->collect_requires();
 547         for(PackageList::iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 548         {
 549                 SourcePackage *spkg=dynamic_cast<SourcePackage *>(*i);
 550                 if(!spkg)
 551                         continue;
 552
 553                 const ComponentList &components=spkg->get_components();
 554                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 555                         j->create_targets();
 556
 557                 if(spkg->get_install_flags()&(SourcePackage::LIB|SourcePackage::INCLUDE))
 558                 {
 559                         PkgConfig *pc=new PkgConfig(*this, *spkg);
 560                         install->add_depend(new Install(*this, *spkg, *pc));
 561                 }
 562
 563                 tarballs->add_depend(new TarBall(*this, *spkg));
 564         }
 565
 566         // Find dependencies until no new targets are created
 567         while(!new_tgts.empty())
 568         {
 569                 Target *tgt=new_tgts.front();
 570                 new_tgts.erase(new_tgts.begin());
 571                 tgt->find_depends();
 572                 if(!tgt->get_depends_ready())
 573                         new_tgts.push_back(tgt);
 574         }
 575
 576         // Apply what-ifs
 577         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 578         {
 579                 Target *tgt=get_target((cwd/ *i).str());
 580                 if(!tgt)
 581                 {
 582                         cerr<<"Unknown what-if target "<<*i<<'\n';
 583                         return -1;
 584                 }
 585                 tgt->touch();
 586         }
 587
 588         // Make the cmdline target depend on all targets mentioned on the command line
 589         Target *cmdline=new VirtualTarget(*this, "cmdline");
 590         bool build_world=false;
 591         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 592         {
 593                 Target *tgt=get_target(*i);
 594                 if(!tgt)
 595                         tgt=get_target((cwd/ *i).str());
 596                 if(!tgt)
 597                 {
 598                         cerr<<"I don't know anything about "<<*i<<'\n';
 599                         return -1;
 600                 }
 601                 if(tgt==world)
 602                         build_world=true;
 603                 cmdline->add_depend(tgt);
 604         }
 605
 606         /* If world is to be built, prepare cmdline.  If not, add cmdline to world
 607            and prepare world.  I don't really like this, but it keeps the graph
 608            acyclic. */
 609         if(build_world)
 610                 cmdline->prepare();
 611         else
 612         {
 613                 world->add_depend(cmdline);
 614                 world->prepare();
 615         }
 616
 617         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 618                 if(SourcePackage *spkg=dynamic_cast<SourcePackage *>(i->second))
 619                         spkg->get_deps_cache().save();
 620
 621         return 0;
 622 }
 623
 624 /**
 625 Check if a header exists, either as a target or a file.  Either an existing
 626 target or a new SystemHeader target will be returned.
 627 */
 628 Target *Builder::get_header(const Msp::FS::Path &fn)
 629 {
 630         Target *tgt=get_target(fn.str());
 631         if(tgt) return tgt;
 632
 633         if(FS::is_reg(fn))
 634         {
 635                 tgt=new SystemHeader(*this, fn.str());
 636                 return tgt;
 637         }
 638         return 0;
 639 }
 640
 641 Target *Builder::get_library(const string &lib, const FS::Path &path, LibMode mode)
 642 {
 643         // Populate a list of candidate filenames
 644         StringList candidates;
 645
 646         if(mode!=ALL_STATIC)
 647         {
 648                 if(current_arch=="win32")
 649                 {
 650                         candidates.push_back("lib"+lib+".dll");
 651                         candidates.push_back(lib+".dll");
 652                 }
 653                 else
 654                         candidates.push_back("lib"+lib+".so");
 655         }
 656
 657         /* Static libraries are always considered, since sometimes shared versions
 658         may not be available */
 659         candidates.push_back("lib"+lib+".a");
 660         if(current_arch=="win32")
 661                 candidates.push_back("lib"+lib+".dll.a");
 662
 663         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 664         {
 665                 string full=(path/ *i).str();
 666                 Target *tgt=get_target(full);
 667
 668                 if(tgt)
 669                 {
 670                         Target *real_tgt=tgt;
 671                         if(dynamic_cast<Install *>(tgt))
 672                                 real_tgt=real_tgt->get_depends().front();
 673
 674                         /* Ignore dynamic libraries from local packages unless library mode is
 675                         DYNAMIC */
 676                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 677                                 continue;
 678                         else if(tgt)
 679                                 return tgt;
 680                 }
 681                 else if(FS::is_reg(full))
 682                 {
 683                         tgt=new SystemLibrary(*this, full);
 684                         return tgt;
 685                 }
 686         }
 687
 688         return 0;
 689 }
 690
 691 /**
 692 Updates a hash with a string.  This is used from get_header and get_library.
 693 */
 694 void Builder::update_hash(string &hash, const string &value)
 695 {
 696         for(unsigned i=0; i<value.size(); ++i)
 697                 hash[i%hash.size()]^=value[i];
 698 }
 699
 700 /**
 701 This function supervises the build process, starting new actions when slots
 702 become available.
 703 */
 704 int Builder::do_build()
 705 {
 706         Target *cmdline=get_target("cmdline");
 707
 708         unsigned total=cmdline->count_rebuild();
 709         if(!total)
 710         {
 711                 cout<<"Already up to date\n";
 712                 return 0;
 713         }
 714         cout<<"Will build "<<total<<" target(s)\n";
 715
 716         vector<Action *> actions;
 717
 718         unsigned count=0;
 719
 720         bool fail=false;
 721         bool finish=false;
 722
 723         while(!finish)
 724         {
 725                 if(actions.size()<jobs && !fail)
 726                 {
 727                         Target *tgt=cmdline->get_buildable_target();
 728                         if(tgt)
 729                         {
 730                                 Action *action=tgt->build();
 731                                 if(action)
 732                                         actions.push_back(action);
 733
 734                                 if(show_progress)
 735                                 {
 736                                         cout<<count<<" of "<<total<<" targets built\033[1G";
 737                                         cout.flush();
 738                                 }
 739                         }
 740                         else if(actions.empty())
 741                                 finish=true;
 742                 }
 743                 else
 744                         Time::sleep(10*Time::msec);
 745
 746                 for(unsigned i=0; i<actions.size();)
 747                 {
 748                         int status=actions[i]->check();
 749                         if(status>=0)
 750                         {
 751                                 ++count;
 752
 753                                 delete actions[i];
 754                                 actions.erase(actions.begin()+i);
 755                                 if(status>0)
 756                                         fail=true;
 757                                 if(actions.empty() && fail)
 758                                         finish=true;
 759                         }
 760                         else
 761                                 ++i;
 762                 }
 763         }
 764
 765         if(show_progress)
 766                 cout<<"\033[K";
 767         if(fail)
 768                 cout<<"Build failed\n";
 769         else if(show_progress)
 770                 cout<<"Build complete\n";
 771
 772         return fail?1:0;
 773 }
 774
 775 /**
 776 Cleans buildable targets.  If clean is 1, cleans only this package.  If
 777 clean is 2 or greater, cleans all buildable packages.
 778 */
 779 int Builder::do_clean()
 780 {
 781         // Cleaning doesn't care about ordering, so a simpler method can be used
 782
 783         set<Target *> clean_tgts;
 784         TargetList queue;
 785         queue.push_back(get_target("cmdline"));
 786
 787         while(!queue.empty())
 788         {
 789                 Target *tgt=queue.front();
 790                 queue.erase(queue.begin());
 791
 792                 if(tgt->get_buildable() && (tgt->get_package()==main_pkg || clean>=2))
 793                         clean_tgts.insert(tgt);
 794
 795                 const TargetList &deps=tgt->get_depends();
 796                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 797                         if(!clean_tgts.count(*i))
 798                                 queue.push_back(*i);
 799         }
 800
 801         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 802         {
 803                 Action *action=new Unlink(*this, **i);
 804                 while(action->check()<0) ;
 805                 delete action;
 806         }
 807
 808         return 0;
 809 }
 810
 811 /**
 812 Prints out information about the default package.
 813 */
 814 void Builder::package_help()
 815 {
 816         const Config &config=main_pkg->get_config();
 817         const Config::OptionMap &options=config.get_options();
 818
 819         cout<<"Required packages:\n  ";
 820         const PackageList &requires=main_pkg->get_requires();
 821         for(PackageList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 822         {
 823                 if(i!=requires.begin())
 824                         cout<<", ";
 825                 cout<<(*i)->get_name();
 826         }
 827         cout<<"\n\n";
 828         cout<<"Package configuration:\n";
 829         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 830         {
 831                 const Config::Option &opt=i->second;
 832                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 833         }
 834 }
 835
 836 Application::RegApp<Builder> Builder::reg;
 837
 838
 839 Builder::Loader::Loader(Builder &b, const FS::Path &s):
 840         bld(b),
 841         src(s)
 842 {
 843         add("architecture", &Loader::architecture);
 844         add("binary_package", &Loader::binpkg);
 845         add("profile", &Loader::profile);
 846         add("package", &Loader::package);
 847 }
 848
 849 void Builder::Loader::architecture(const string &n)
 850 {
 851         Architecture arch(bld, n);
 852         load_sub(arch);
 853         bld.archs.insert(ArchMap::value_type(n, arch));
 854 }
 855
 856 void Builder::Loader::binpkg(const string &n)
 857 {
 858         BinaryPackage *pkg=new BinaryPackage(bld, n);
 859         load_sub(*pkg);
 860         bld.packages.insert(PackageMap::value_type(n, pkg));
 861 }
 862
 863 void Builder::Loader::profile(const string &n)
 864 {
 865         StringMap prf;
 866         ProfileLoader ldr(prf);
 867         load_sub_with(ldr);
 868         bld.profile_tmpl.insert(ProfileTemplateMap::value_type(n, prf));
 869 }
 870
 871 void Builder::Loader::package(const string &n)
 872 {
 873         SourcePackage *pkg=new SourcePackage(bld, n, src);
 874         if(!bld.main_pkg)
 875                 bld.main_pkg=pkg;
 876
 877         load_sub(*pkg);
 878         bld.packages.insert(PackageMap::value_type(n, pkg));
 879 }
 880
 881
 882 Builder::ProfileLoader::ProfileLoader(StringMap &p):
 883         profile(p)
 884 {
 885         add("option", &ProfileLoader::option);
 886 }
 887
 888 void Builder::ProfileLoader::option(const string &o, const string &v)
 889 {
 890         profile.insert(StringMap::value_type(o, v));
 891 }