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