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 <sys/utsname.h>
  11 #include <msp/core/except.h>
  12 #include <msp/core/getopt.h>
  13 #include <msp/datafile/parser.h>
  14 #include <msp/fs/dir.h>
  15 #include <msp/fs/stat.h>
  16 #include <msp/fs/utils.h>
  17 #include <msp/io/buffered.h>
  18 #include <msp/io/except.h>
  19 #include <msp/io/file.h>
  20 #include <msp/strings/formatter.h>
  21 #include <msp/strings/regex.h>
  22 #include <msp/strings/utils.h>
  23 #include <msp/time/units.h>
  24 #include <msp/time/utils.h>
  25 #include "action.h"
  26 #include "analyzer.h"
  27 #include "binarypackage.h"
  28 #include "builder.h"
  29 #include "header.h"
  30 #include "install.h"
  31 #include "misc.h"
  32 #include "package.h"
  33 #include "pkgconfig.h"
  34 #include "sharedlibrary.h"
  35 #include "sourcepackage.h"
  36 #include "systemlibrary.h"
  37 #include "tarball.h"
  38 #include "unlink.h"
  39 #include "virtualtarget.h"
  40
  41 using namespace std;
  42 using namespace Msp;
  43
  44 Builder::Builder(int argc, char **argv):
  45         main_pkg(0),
  46         analyzer(0),
  47         build(false),
  48         clean(0),
  49         dry_run(false),
  50         help(false),
  51         verbose(1),
  52         show_progress(false),
  53         build_file("Build"),
  54         jobs(1),
  55         conf_all(false),
  56         conf_only(false),
  57         build_all(false),
  58         create_makefile(false)
  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         string   arch;
  67
  68         GetOpt getopt;
  69         getopt.add_option('a', "analyze",    analyze_mode, GetOpt::REQUIRED_ARG);
  70         getopt.add_option('b', "build",      build,        GetOpt::NO_ARG);
  71         getopt.add_option('c', "clean",      clean,        GetOpt::NO_ARG);
  72         getopt.add_option('f', "file",       build_file,   GetOpt::REQUIRED_ARG);
  73         getopt.add_option('h', "help",       help,         GetOpt::NO_ARG);
  74         getopt.add_option('j', "jobs",       jobs,         GetOpt::REQUIRED_ARG);
  75         getopt.add_option('n', "dry-run",    dry_run,      GetOpt::NO_ARG);
  76         getopt.add_option('v', "verbose",    verbose,      GetOpt::NO_ARG);
  77         getopt.add_option('A', "conf-all",   conf_all,     GetOpt::NO_ARG);
  78         getopt.add_option('B', "build-all",  build_all,    GetOpt::NO_ARG);
  79         getopt.add_option('C', "chdir",      work_dir,     GetOpt::REQUIRED_ARG);
  80         getopt.add_option('P', "progress",   show_progress, GetOpt::NO_ARG);
  81         getopt.add_option('W', "what-if",    what_if,      GetOpt::REQUIRED_ARG);
  82         getopt.add_option(     "arch",       arch,         GetOpt::REQUIRED_ARG);
  83         getopt.add_option(     "conf-only",  conf_only,    GetOpt::NO_ARG);
  84         getopt.add_option(     "full-paths", full_paths,   GetOpt::NO_ARG);
  85         //getopt.add_option(     "makefile",   create_makefile, GetOpt::NO_ARG);
  86         getopt.add_option(     "max-depth",  max_depth,    GetOpt::REQUIRED_ARG);
  87         getopt.add_option(     "prefix",     prfx,         GetOpt::REQUIRED_ARG);
  88         getopt.add_option(     "warnings",   cmdline_warn, GetOpt::REQUIRED_ARG);
  89         getopt(argc, argv);
  90
  91         if(!analyze_mode.empty())
  92         {
  93                 analyzer=new Analyzer(*this);
  94
  95                 if(analyze_mode=="deps")
  96                         analyzer->set_mode(Analyzer::DEPS);
  97                 else if(analyze_mode=="alldeps")
  98                         analyzer->set_mode(Analyzer::ALLDEPS);
  99                 else if(analyze_mode=="rebuild")
 100                         analyzer->set_mode(Analyzer::REBUILD);
 101                 else if(analyze_mode=="rdeps")
 102                         analyzer->set_mode(Analyzer::RDEPS);
 103                 else
 104                         throw UsageError("Invalid analyze mode");
 105
 106                 analyzer->set_max_depth(max_depth);
 107                 analyzer->set_full_paths(full_paths);
 108         }
 109         else if(!clean && !create_makefile)
 110                 build=true;
 111
 112         const vector<string> &args=getopt.get_args();
 113         for(vector<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
 114         {
 115                 unsigned equal=i->find('=');
 116                 if(equal!=string::npos)
 117                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 118                 else
 119                         cmdline_targets.push_back(*i);
 120         }
 121
 122         if(cmdline_targets.empty())
 123                 cmdline_targets.push_back("default");
 124
 125         if(!work_dir.empty())
 126                 chdir(work_dir.c_str());
 127
 128         cwd=FS::getcwd();
 129
 130         utsname un;
 131         string sysname="native";
 132         if(uname(&un)==0)
 133                 sysname=tolower(un.sysname);
 134
 135         native_arch=&archs.insert(ArchMap::value_type(sysname, Architecture(*this, sysname, true))).first->second;
 136         native_arch->set_tool("CC",  "gcc");
 137         native_arch->set_tool("CXX", "g++");
 138         native_arch->set_tool("LD",  "gcc");
 139         native_arch->set_tool("LXX", "g++");
 140         native_arch->set_tool("AR",  "ar");
 141
 142         load_build_file((FS::get_sys_data_dir(argv[0], "builder")/"builderrc").str());
 143         load_build_file((FS::get_home_dir()/".builderrc").str());
 144
 145         if(arch.empty())
 146                 current_arch=native_arch;
 147         else
 148                 current_arch=&get_architecture(arch);
 149
 150         if(prfx.empty())
 151         {
 152                 if(current_arch->is_native())
 153                         prefix=(FS::get_home_dir()/"local").str();
 154                 else
 155                         prefix=(FS::get_home_dir()/"local"/current_arch->get_name()).str();
 156         }
 157         else
 158                 prefix=FS::getcwd()/prfx;
 159
 160         warnings.push_back("all");
 161         warnings.push_back("extra");
 162         warnings.push_back("shadow");
 163         warnings.push_back("pointer-arith");
 164         warnings.push_back("error");
 165         for(StringList::iterator i=cmdline_warn.begin(); i!=cmdline_warn.end(); ++i)
 166         {
 167                 vector<string> warns=split(*i, ',');
 168                 warnings.insert(warnings.end(), warns.begin(), warns.end());
 169         }
 170
 171         pkg_path.push_back(cwd/".");
 172         pkg_path.push_back(cwd/"..");
 173 }
 174
 175 /**
 176 Gets a package by name, possibly creating it.
 177
 178 @param   name  Package name
 179
 180 @return  Pointer to the package, or 0 if the package could not be located
 181 */
 182 Package *Builder::get_package(const string &name)
 183 {
 184         PackageMap::iterator i=packages.find(format("%s/%s", name, current_arch->get_name()));
 185         if(i==packages.end())
 186                 i=packages.find(name);
 187         if(i!=packages.end())
 188                 return i->second;
 189
 190         FS::Path path=get_package_location(name);
 191         if(!path.empty() && !load_build_file(path/"Build"))
 192         {
 193                 i=packages.find(name);
 194                 if(i!=packages.end())
 195                         return i->second;
 196         }
 197
 198         // Package source not found - create a binary package
 199         Package *pkg=BinaryPackage::from_pkgconfig(*this, name);
 200
 201         packages.insert(PackageMap::value_type(name, pkg));
 202
 203         if(!pkg)
 204                 problem(name, "not found");
 205
 206         return pkg;
 207 }
 208
 209 /**
 210 Returns the target with the given name, or 0 if no such target exists.
 211 */
 212 Target *Builder::get_target(const string &n) const
 213 {
 214         TargetMap::const_iterator i=targets.find(n);
 215         if(i!=targets.end())
 216                 return i->second;
 217         return 0;
 218 }
 219
 220 /**
 221 Tries to locate a header included from a given location and with a given include
 222 path.  Considers known targets as well as existing files.  If a matching target
 223 is not found but a file exists, a new SystemHeader target will be created and
 224 returned.
 225 */
 226 Target *Builder::get_header(const string &include, const string &from, const list<string> &path)
 227 {
 228         string hash(8, 0);
 229         if(include[0]=='\"')
 230                 update_hash(hash, from);
 231         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 232                 update_hash(hash, *i);
 233
 234         string id=hash+include;
 235         TargetMap::iterator i=includes.find(id);
 236         if(i!=includes.end())
 237                 return i->second;
 238
 239         static string cxx_ver;
 240         if(cxx_ver.empty())
 241         {
 242                 StringList argv;
 243                 argv.push_back(current_arch->get_tool("CXX"));
 244                 argv.push_back("--version");
 245                 cxx_ver=Regex("[0-9]\\.[0-9.]+").match(run_command(argv))[0].str;
 246                 while(!cxx_ver.empty() && !FS::is_dir(FS::Path("/usr/include/c++")/cxx_ver))
 247                 {
 248                         unsigned dot=cxx_ver.rfind('.');
 249                         if(dot==string::npos)
 250                                 break;
 251                         cxx_ver.erase(dot);
 252                 }
 253                 if(verbose>=5)
 254                         cout<<"C++ version is "<<cxx_ver<<'\n';
 255         }
 256
 257         string fn=include.substr(1);
 258         if(verbose>=5)
 259                 cout<<"Looking for include "<<fn<<" with path "<<join(path.begin(), path.end())<<'\n';
 260
 261         StringList syspath;
 262         if(current_arch->is_native())
 263                 syspath.push_back("/usr/include");
 264         else
 265                 syspath.push_back("/usr/"+current_arch->get_prefix()+"/include");
 266         syspath.push_back((FS::Path("/usr/include/c++/")/cxx_ver).str());
 267
 268         Target *tgt=0;
 269         if(include[0]=='\"')
 270                 tgt=get_header(FS::Path(from)/fn);
 271         for(list<string>::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 272                 tgt=get_header(cwd/ *j/fn);
 273         for(list<string>::const_iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 274                 tgt=get_header(FS::Path(*j)/fn);
 275
 276         includes.insert(TargetMap::value_type(id, tgt));
 277
 278         return tgt;
 279 }
 280
 281 /**
 282 Tries to locate a library with the given library path.  Considers known targets
 283 as well as existing files.  If a matching target is not found but a file exists,
 284 a new SystemLibrary target will be created and returned.
 285
 286 @param   lib   Name of the library to get (without "lib" prefix or extension)
 287 @param   path  List of paths to search for the library
 288 @param   mode  Shared / static mode
 289
 290 @return  Some kind of library target, if a match was found
 291 */
 292 Target *Builder::get_library(const string &lib, const list<string> &path, LibMode mode)
 293 {
 294         string hash(8, 0);
 295         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 296                 update_hash(hash, *i);
 297
 298         string id=hash+string(1, mode)+lib;
 299         TargetMap::iterator i=libraries.find(id);
 300         if(i!=libraries.end())
 301                 return i->second;
 302
 303         StringList syspath;
 304         if(current_arch->is_native())
 305         {
 306                 syspath.push_back("/lib");
 307                 syspath.push_back("/usr/lib");
 308         }
 309         else
 310                 syspath.push_back("/usr/"+current_arch->get_prefix()+"/lib");
 311
 312         if(verbose>=5)
 313                 cout<<"Looking for library "<<lib<<" with path "<<join(path.begin(), path.end())<<'\n';
 314
 315         Target *tgt=0;
 316         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 317                 tgt=get_library(lib, cwd/ *j, mode);
 318         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 319                 tgt=get_library(lib, *j, mode);
 320
 321         libraries.insert(TargetMap::value_type(id, tgt));
 322
 323         return tgt;
 324 }
 325
 326 const Architecture &Builder::get_architecture(const string &arch) const
 327 {
 328         ArchMap::const_iterator i=archs.find(arch);
 329         if(i==archs.end())
 330                 throw KeyError("Unknown architecture", arch);
 331
 332         return i->second;
 333 }
 334
 335 void Builder::apply_profile_template(Config &config, const string &pt) const
 336 {
 337         vector<string> parts=split(pt, '-');
 338
 339         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 340         {
 341                 ProfileTemplateMap::const_iterator j=profile_tmpl.find(*i);
 342                 if(j==profile_tmpl.end())
 343                         continue;
 344
 345                 config.update(j->second);
 346         }
 347 }
 348
 349 void Builder::problem(const string &p, const string &d)
 350 {
 351         problems.push_back(Problem(p, d));
 352 }
 353
 354 /**
 355 Adds a target to both the target map and the new target queue.  Called from
 356 Target constructor.
 357 */
 358 void Builder::add_target(Target *t)
 359 {
 360         targets.insert(TargetMap::value_type(t->get_name(), t));
 361         new_tgts.push_back(t);
 362 }
 363
 364 int Builder::main()
 365 {
 366         if(load_build_file(cwd/build_file))
 367         {
 368                 cerr<<"No build info here.\n";
 369                 return 1;
 370         }
 371
 372         main_pkg->configure(cmdline_options, conf_all?2:1);
 373
 374         if(help)
 375         {
 376                 usage(0, "builder", false);
 377                 cout<<'\n';
 378                 package_help();
 379                 return 0;
 380         }
 381
 382         if(!conf_only && create_targets())
 383                 return 1;
 384
 385         PackageList all_reqs=main_pkg->collect_requires();
 386
 387         if(conf_only)
 388                 return 0;
 389
 390         if(verbose>=2)
 391                 cout<<"Building on "<<native_arch->get_name()<<", for "<<current_arch->get_name()<<'\n';
 392         if(verbose>=1)
 393                 cout<<all_reqs.size()<<" active packages, "<<targets.size()<<" targets\n";
 394         if(verbose>=2)
 395         {
 396                 for(PackageList::const_iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 397                 {
 398                         cout<<' '<<(*i)->get_name();
 399                         if(dynamic_cast<SourcePackage *>(*i))
 400                                 cout<<'*';
 401                         unsigned count=0;
 402                         unsigned ood_count=0;
 403                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 404                                 if(j->second->get_package()==*i)
 405                                 {
 406                                         ++count;
 407                                         if(j->second->get_rebuild())
 408                                                 ++ood_count;
 409                                 }
 410                         if(count)
 411                         {
 412                                 cout<<" ("<<count<<" targets";
 413                                 if(ood_count)
 414                                         cout<<", "<<ood_count<<" out-of-date";
 415                                 cout<<')';
 416                         }
 417                         cout<<'\n';
 418                 }
 419         }
 420
 421         if(analyzer)
 422                 analyzer->analyze();
 423
 424         if(!problems.empty())
 425         {
 426                 cerr<<"The following problems were detected:\n";
 427                 for(ProblemList::iterator i=problems.begin(); i!=problems.end(); ++i)
 428                         cerr<<"  "<<i->package<<": "<<i->descr<<'\n';
 429                 cerr<<"Please fix them and try again.\n";
 430                 return 1;
 431         }
 432
 433         //if(create_makefile
 434
 435         if(clean)
 436                 exit_code=do_clean();
 437         else if(build)
 438                 exit_code=do_build();
 439
 440         return exit_code;
 441 }
 442
 443 Builder::~Builder()
 444 {
 445         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 446                 delete i->second;
 447         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 448                 delete i->second;
 449         delete analyzer;
 450 }
 451
 452 void Builder::usage(const char *reason, const char *argv0, bool brief)
 453 {
 454         if(reason)
 455                 cerr<<reason<<'\n';
 456
 457         if(brief)
 458                 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";
 459         else
 460         {
 461                 cerr<<
 462                         "Usage: "<<argv0<<" [options] [<target> ...]\n"
 463                         "\n"
 464                         "Options:\n"
 465                         "  -a, --analyze MODE  Perform analysis.  MODE can be deps, alldeps or rebuild.\n"
 466                         "  -b, --build         Perform build even if doing analysis.\n"
 467                         "  -c, --clean         Clean buildable targets.\n"
 468                         "  -f, --file FILE     Read info from FILE instead of Build.\n"
 469                         "  -h, --help          Print this message.\n"
 470                         "  -j, --jobs NUM      Run NUM commands at once, whenever possible.\n"
 471                         "  -n, --dry-run       Don't actually do anything, only show what would be done.\n"
 472                         "  -v, --verbose       Print more information about what's going on.\n"
 473                         "  -A, --conf-all      Apply configuration to all packages.\n"
 474                         "  -B, --build-all     Build all targets unconditionally.\n"
 475                         "  -C, --chdir DIR     Change to DIR before doing anything else.\n"
 476                         "  -P, --progress      Display progress while building.\n"
 477                         "  -W, --what-if FILE  Pretend that FILE has changed.\n"
 478                         "  --arch ARCH         Architecture to build for.\n"
 479                         "  --conf-only         Stop after configuring packages.\n"
 480                         "  --full-paths        Output full paths in analysis.\n"
 481                         //"  --makefile          Create a makefile for this package.\n"
 482                         "  --max-depth NUM     Maximum depth to show in analysis.\n"
 483                         "  --prefix DIR        Directory to install things to.\n"
 484                         "  --warnings LIST     Compiler warnings to use.\n";
 485         }
 486 }
 487
 488 /**
 489 Determines the source directory of a package.  pkg-config is consulted first,
 490 and if it fails, the package path is searched for matches.
 491 */
 492 FS::Path Builder::get_package_location(const string &name)
 493 {
 494         if(verbose>=3)
 495                 cout<<"Looking for package "<<name<<'\n';
 496
 497         // Try to get source directory with pkgconfig
 498         list<string> argv;
 499         argv.push_back("pkg-config");
 500         argv.push_back("--variable=source");
 501         argv.push_back(name);
 502         if(verbose>=4)
 503                 cout<<"Running "<<join(argv.begin(), argv.end())<<'\n';
 504         string srcdir=strip(run_command(argv));
 505         if(!srcdir.empty())
 506                 return srcdir;
 507
 508         if(pkg_dirs.empty())
 509         {
 510                 for(list<FS::Path>::const_iterator i=pkg_path.begin(); i!=pkg_path.end(); ++i)
 511                 {
 512                         list<string> files=list_files(*i);
 513                         for(list<string>::const_iterator j=files.begin(); j!=files.end(); ++j)
 514                         {
 515                                 FS::Path full=*i / *j;
 516                                 if(FS::exists(full/"Build"))
 517                                         pkg_dirs.push_back(full);
 518                         }
 519                 }
 520                 if(verbose>=3)
 521                         cout<<pkg_dirs.size()<<" packages found in path\n";
 522         }
 523
 524         bool msp=!name.compare(0, 3, "msp");
 525         for(list<FS::Path>::const_iterator i=pkg_dirs.begin(); i!=pkg_dirs.end(); ++i)
 526         {
 527                 string base=basename(*i);
 528                 unsigned dash=base.rfind('-');
 529
 530                 if(!base.compare(0, dash, name))
 531                         return *i;
 532                 else if(msp && !base.compare(0, dash-3, name, 3, string::npos))
 533                         return *i;
 534         }
 535
 536         return FS::Path();
 537 }
 538
 539 /**
 540 Loads the given build file.
 541
 542 @param   fn  Path to the file
 543
 544 @return  0 on success, -1 if the file could not be opened
 545 */
 546 int Builder::load_build_file(const FS::Path &fn)
 547 {
 548         try
 549         {
 550                 IO::BufferedFile in(fn.str());
 551
 552                 if(verbose>=3)
 553                         cout<<"Reading "<<fn<<'\n';
 554
 555                 DataFile::Parser parser(in, fn.str());
 556                 Loader loader(*this, fn.subpath(0, fn.size()-1));
 557                 loader.load(parser);
 558         }
 559         catch(const IO::FileNotFound &)
 560         {
 561                 return -1;
 562         }
 563
 564         return 0;
 565 }
 566
 567 /**
 568 Creates targets for all packages and prepares them for building.
 569
 570 @return  0 if everything went ok, -1 if something bad happened and a build
 571          shouldn't be attempted
 572 */
 573 int Builder::create_targets()
 574 {
 575         Target *world=new VirtualTarget(*this, "world");
 576
 577         Target *def_tgt=new VirtualTarget(*this, "default");
 578         world->add_depend(def_tgt);
 579
 580         Target *install=new VirtualTarget(*this, "install");
 581         world->add_depend(install);
 582
 583         Target *tarballs=new VirtualTarget(*this, "tarballs");
 584         world->add_depend(tarballs);
 585
 586         PackageList all_reqs=main_pkg->collect_requires();
 587         for(PackageList::iterator i=all_reqs.begin(); i!=all_reqs.end(); ++i)
 588         {
 589                 SourcePackage *spkg=dynamic_cast<SourcePackage *>(*i);
 590                 if(!spkg)
 591                         continue;
 592
 593                 const ComponentList &components=spkg->get_components();
 594                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 595                         j->create_targets();
 596
 597                 if(spkg->get_install_flags()&(SourcePackage::LIB|SourcePackage::INCLUDE))
 598                 {
 599                         PkgConfig *pc=new PkgConfig(*this, *spkg);
 600                         install->add_depend(new Install(*this, *spkg, *pc));
 601                 }
 602
 603                 tarballs->add_depend(new TarBall(*this, *spkg));
 604         }
 605
 606         // Find dependencies until no new targets are created
 607         while(!new_tgts.empty())
 608         {
 609                 Target *tgt=new_tgts.front();
 610                 new_tgts.erase(new_tgts.begin());
 611                 tgt->find_depends();
 612                 if(!tgt->get_depends_ready())
 613                         new_tgts.push_back(tgt);
 614         }
 615
 616         // Apply what-ifs
 617         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 618         {
 619                 Target *tgt=get_target((cwd/ *i).str());
 620                 if(!tgt)
 621                 {
 622                         cerr<<"Unknown what-if target "<<*i<<'\n';
 623                         return -1;
 624                 }
 625                 tgt->touch();
 626         }
 627
 628         // Make the cmdline target depend on all targets mentioned on the command line
 629         Target *cmdline=new VirtualTarget(*this, "cmdline");
 630         bool build_world=false;
 631         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 632         {
 633                 Target *tgt=get_target(*i);
 634                 if(!tgt)
 635                         tgt=get_target((cwd/ *i).str());
 636                 if(!tgt)
 637                 {
 638                         cerr<<"I don't know anything about "<<*i<<'\n';
 639                         return -1;
 640                 }
 641                 if(tgt==world)
 642                         build_world=true;
 643                 cmdline->add_depend(tgt);
 644         }
 645
 646         /* If world is to be built, prepare cmdline.  If not, add cmdline to world
 647            and prepare world.  I don't really like this, but it keeps the graph
 648            acyclic. */
 649         if(build_world)
 650                 cmdline->prepare();
 651         else
 652         {
 653                 world->add_depend(cmdline);
 654                 world->prepare();
 655         }
 656
 657         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 658                 if(SourcePackage *spkg=dynamic_cast<SourcePackage *>(i->second))
 659                         spkg->get_deps_cache().save();
 660
 661         return 0;
 662 }
 663
 664 /**
 665 Check if a header exists, either as a target or a file.  Either an existing
 666 target or a new SystemHeader target will be returned.
 667 */
 668 Target *Builder::get_header(const Msp::FS::Path &fn)
 669 {
 670         Target *tgt=get_target(fn.str());
 671         if(tgt) return tgt;
 672
 673         if(FS::is_reg(fn))
 674         {
 675                 tgt=new SystemHeader(*this, fn.str());
 676                 return tgt;
 677         }
 678         return 0;
 679 }
 680
 681 Target *Builder::get_library(const string &lib, const FS::Path &path, LibMode mode)
 682 {
 683         // Populate a list of candidate filenames
 684         StringList candidates;
 685
 686         if(mode!=ALL_STATIC)
 687         {
 688                 if(current_arch->get_name()=="win32")
 689                 {
 690                         candidates.push_back("lib"+lib+".dll");
 691                         candidates.push_back(lib+".dll");
 692                 }
 693                 else
 694                         candidates.push_back("lib"+lib+".so");
 695         }
 696
 697         /* Static libraries are always considered, since sometimes shared versions
 698         may not be available */
 699         candidates.push_back("lib"+lib+".a");
 700         if(current_arch->get_name()=="win32")
 701                 candidates.push_back("lib"+lib+".dll.a");
 702
 703         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 704         {
 705                 string full=(path/ *i).str();
 706                 Target *tgt=get_target(full);
 707
 708                 if(tgt)
 709                 {
 710                         Target *real_tgt=tgt;
 711                         if(dynamic_cast<Install *>(tgt))
 712                                 real_tgt=real_tgt->get_depends().front();
 713
 714                         /* Ignore dynamic libraries from local packages unless library mode is
 715                         DYNAMIC */
 716                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 717                                 continue;
 718                         else if(tgt)
 719                                 return tgt;
 720                 }
 721                 else if(FS::is_reg(full))
 722                 {
 723                         tgt=new SystemLibrary(*this, full);
 724                         return tgt;
 725                 }
 726         }
 727
 728         return 0;
 729 }
 730
 731 /**
 732 Updates a hash with a string.  This is used from get_header and get_library.
 733 */
 734 void Builder::update_hash(string &hash, const string &value)
 735 {
 736         for(unsigned i=0; i<value.size(); ++i)
 737                 hash[i%hash.size()]^=value[i];
 738 }
 739
 740 /**
 741 This function supervises the build process, starting new actions when slots
 742 become available.
 743 */
 744 int Builder::do_build()
 745 {
 746         Target *cmdline=get_target("cmdline");
 747
 748         unsigned total=cmdline->count_rebuild();
 749         if(!total)
 750         {
 751                 cout<<"Already up to date\n";
 752                 return 0;
 753         }
 754         if(verbose>=1)
 755                 cout<<"Will build "<<total<<" target(s)\n";
 756
 757         vector<Action *> actions;
 758
 759         unsigned count=0;
 760
 761         bool fail=false;
 762         bool finish=false;
 763
 764         while(!finish)
 765         {
 766                 if(actions.size()<jobs && !fail)
 767                 {
 768                         Target *tgt=cmdline->get_buildable_target();
 769                         if(tgt)
 770                         {
 771                                 Action *action=tgt->build();
 772                                 if(action)
 773                                         actions.push_back(action);
 774
 775                                 if(show_progress)
 776                                 {
 777                                         cout<<count<<" of "<<total<<" targets built\033[1G";
 778                                         cout.flush();
 779                                 }
 780                         }
 781                         else if(actions.empty())
 782                                 finish=true;
 783                 }
 784                 else
 785                         Time::sleep(10*Time::msec);
 786
 787                 for(unsigned i=0; i<actions.size();)
 788                 {
 789                         int status=actions[i]->check();
 790                         if(status>=0)
 791                         {
 792                                 ++count;
 793
 794                                 delete actions[i];
 795                                 actions.erase(actions.begin()+i);
 796                                 if(status>0)
 797                                         fail=true;
 798                                 if(actions.empty() && fail)
 799                                         finish=true;
 800                         }
 801                         else
 802                                 ++i;
 803                 }
 804         }
 805
 806         if(show_progress)
 807                 cout<<"\033[K";
 808         if(fail)
 809                 cout<<"Build failed\n";
 810         else if(show_progress)
 811                 cout<<"Build complete\n";
 812
 813         return fail?1:0;
 814 }
 815
 816 /**
 817 Cleans buildable targets.  If clean is 1, cleans only this package.  If
 818 clean is 2 or greater, cleans all buildable packages.
 819 */
 820 int Builder::do_clean()
 821 {
 822         // Cleaning doesn't care about ordering, so a simpler method can be used
 823
 824         set<Target *> clean_tgts;
 825         TargetList queue;
 826         queue.push_back(get_target("cmdline"));
 827
 828         while(!queue.empty())
 829         {
 830                 Target *tgt=queue.front();
 831                 queue.erase(queue.begin());
 832
 833                 if(tgt->get_buildable() && (tgt->get_package()==main_pkg || clean>=2))
 834                         clean_tgts.insert(tgt);
 835
 836                 const TargetList &deps=tgt->get_depends();
 837                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 838                         if(!clean_tgts.count(*i))
 839                                 queue.push_back(*i);
 840         }
 841
 842         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 843         {
 844                 Action *action=new Unlink(*this, **i);
 845                 while(action->check()<0) ;
 846                 delete action;
 847         }
 848
 849         return 0;
 850 }
 851
 852 /**
 853 Prints out information about the default package.
 854 */
 855 void Builder::package_help()
 856 {
 857         const Config &config=main_pkg->get_config();
 858         const Config::OptionMap &options=config.get_options();
 859
 860         cout<<"Required packages:\n  ";
 861         const PackageList &requires=main_pkg->get_requires();
 862         for(PackageList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 863         {
 864                 if(i!=requires.begin())
 865                         cout<<", ";
 866                 cout<<(*i)->get_name();
 867         }
 868         cout<<"\n\n";
 869         cout<<"Package configuration:\n";
 870         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 871         {
 872                 const Config::Option &opt=i->second;
 873                 cout<<"  "<<opt.name<<": "<<opt.descr<<" ("<<opt.value<<") ["<<opt.defv<<"]\n";
 874         }
 875 }
 876
 877 Application::RegApp<Builder> Builder::reg;
 878
 879
 880 Builder::Loader::Loader(Builder &b, const FS::Path &s):
 881         bld(b),
 882         src(s)
 883 {
 884         add("architecture", &Loader::architecture);
 885         add("binary_package", &Loader::binpkg);
 886         add("profile", &Loader::profile);
 887         add("package", &Loader::package);
 888 }
 889
 890 void Builder::Loader::architecture(const string &n)
 891 {
 892         Architecture arch(bld, n);
 893         load_sub(arch);
 894         bld.archs.insert(ArchMap::value_type(n, arch));
 895 }
 896
 897 void Builder::Loader::binpkg(const string &n)
 898 {
 899         BinaryPackage *pkg=new BinaryPackage(bld, n);
 900         load_sub(*pkg);
 901         bld.packages.insert(PackageMap::value_type(n, pkg));
 902 }
 903
 904 void Builder::Loader::profile(const string &n)
 905 {
 906         StringMap prf;
 907         ProfileLoader ldr(prf);
 908         load_sub_with(ldr);
 909         bld.profile_tmpl.insert(ProfileTemplateMap::value_type(n, prf));
 910 }
 911
 912 void Builder::Loader::package(const string &n)
 913 {
 914         SourcePackage *pkg=new SourcePackage(bld, n, src);
 915         if(!bld.main_pkg)
 916                 bld.main_pkg=pkg;
 917
 918         load_sub(*pkg);
 919         bld.packages.insert(PackageMap::value_type(n, pkg));
 920 }
 921
 922
 923 Builder::ProfileLoader::ProfileLoader(StringMap &p):
 924         profile(p)
 925 {
 926         add("option", &ProfileLoader::option);
 927 }
 928
 929 void Builder::ProfileLoader::option(const string &o, const string &v)
 930 {
 931         profile.insert(StringMap::value_type(o, v));
 932 }