source/builder.cpp

   1 #include <set>
   2 #include <cstdlib>
   3 #include <msp/core/getopt.h>
   4 #include <msp/datafile/parser.h>
   5 #include <msp/fs/dir.h>
   6 #include <msp/fs/stat.h>
   7 #include <msp/fs/utils.h>
   8 #include <msp/io/buffered.h>
   9 #include <msp/io/file.h>
  10 #include <msp/io/print.h>
  11 #include <msp/strings/format.h>
  12 #include <msp/strings/regex.h>
  13 #include <msp/strings/utils.h>
  14 #include <msp/time/units.h>
  15 #include <msp/time/utils.h>
  16 #include "action.h"
  17 #include "analyzer.h"
  18 #include "binarypackage.h"
  19 #include "builder.h"
  20 #include "header.h"
  21 #include "install.h"
  22 #include "misc.h"
  23 #include "package.h"
  24 #include "pkgconfig.h"
  25 #include "sharedlibrary.h"
  26 #include "sourcepackage.h"
  27 #include "systemlibrary.h"
  28 #include "unlink.h"
  29 #include "virtualtarget.h"
  30
  31 using namespace std;
  32 using namespace Msp;
  33
  34 namespace {
  35
  36 void update_hash(string &hash, const string &value)
  37 {
  38         for(unsigned i=0; i<value.size(); ++i)
  39                 hash[i%hash.size()] ^= value[i];
  40 }
  41
  42 }
  43
  44
  45 Builder::Builder(int argc, char **argv):
  46         main_pkg(0),
  47         native_arch(*this, string()),
  48         analyzer(0),
  49         build(false),
  50         clean(0),
  51         dry_run(false),
  52         help(false),
  53         verbose(1),
  54         show_progress(false),
  55         build_file("Build"),
  56         jobs(1),
  57         conf_all(false),
  58         conf_only(false),
  59         build_all(false),
  60         create_makefile(false)
  61 {
  62         string analyze_mode;
  63         string work_dir;
  64         bool full_paths = false;
  65         unsigned max_depth = 5;
  66         StringList cmdline_warn;
  67         string prfx;
  68         string arch;
  69
  70         GetOpt getopt;
  71         getopt.add_option('a', "analyze",    analyze_mode,  GetOpt::REQUIRED_ARG).set_help("Perform analysis.  MODE can be deps, alldeps or rebuild.", "MODE");
  72         getopt.add_option('b', "build",      build,         GetOpt::NO_ARG).set_help("Perform build even if doing analysis.");
  73         getopt.add_option('c', "clean",      clean,         GetOpt::NO_ARG).set_help("Clean buildable targets.");
  74         getopt.add_option('f', "file",       build_file,    GetOpt::REQUIRED_ARG).set_help("Read info from FILE instead of Build.", "FILE");
  75         getopt.add_option('h', "help",       help,          GetOpt::NO_ARG).set_help("Print this message.");
  76         getopt.add_option('j', "jobs",       jobs,          GetOpt::REQUIRED_ARG).set_help("Run NUM commands at once, whenever possible.", "NUM");
  77         getopt.add_option('n', "dry-run",    dry_run,       GetOpt::NO_ARG).set_help("Don't actually do anything, only show what would be done.");
  78         getopt.add_option('v', "verbose",    verbose,       GetOpt::NO_ARG).set_help("Print more information about what's going on.");
  79         getopt.add_option('x', "no-externals",  no_externals, GetOpt::NO_ARG).set_help("Do not load external source packages.");
  80         getopt.add_option('A', "conf-all",   conf_all,      GetOpt::NO_ARG).set_help("Apply configuration to all packages.");
  81         getopt.add_option('B', "build-all",  build_all,     GetOpt::NO_ARG).set_help("Build all targets unconditionally.");
  82         getopt.add_option('C', "chdir",      work_dir,      GetOpt::REQUIRED_ARG).set_help("Change to DIR before doing anything else.", "DIR");
  83         getopt.add_option('P', "progress",   show_progress, GetOpt::NO_ARG).set_help("Display progress while building.");
  84         getopt.add_option('W', "what-if",    what_if,       GetOpt::REQUIRED_ARG).set_help("Pretend that FILE has changed.", "FILE");
  85         getopt.add_option(     "arch",       arch,          GetOpt::REQUIRED_ARG).set_help("Architecture to build for.", "ARCH");
  86         getopt.add_option(     "conf-only",  conf_only,     GetOpt::NO_ARG).set_help("Stop after configuring packages.");
  87         getopt.add_option(     "full-paths", full_paths,    GetOpt::NO_ARG).set_help("Output full paths in analysis.");
  88         getopt.add_option(     "max-depth",  max_depth,     GetOpt::REQUIRED_ARG).set_help("Maximum depth to show in analysis.", "NUM");
  89         getopt.add_option(     "prefix",     prfx,          GetOpt::REQUIRED_ARG).set_help("Directory to install things to.", "DIR");
  90         getopt.add_option(     "warnings",   cmdline_warn,  GetOpt::REQUIRED_ARG).set_help("Compiler warnings to use.", "LIST");
  91         usagemsg = getopt.generate_usage(argv[0])+" [<target> ...]";
  92         helpmsg = getopt.generate_help();
  93         getopt(argc, argv);
  94
  95         if(!analyze_mode.empty())
  96         {
  97                 analyzer = new Analyzer(*this);
  98
  99                 if(analyze_mode=="deps")
 100                         analyzer->set_mode(Analyzer::DEPS);
 101                 else if(analyze_mode=="alldeps")
 102                         analyzer->set_mode(Analyzer::ALLDEPS);
 103                 else if(analyze_mode=="rebuild")
 104                         analyzer->set_mode(Analyzer::REBUILD);
 105                 else if(analyze_mode=="rdeps")
 106                         analyzer->set_mode(Analyzer::RDEPS);
 107                 else
 108                         throw usage_error("Invalid analyze mode");
 109
 110                 analyzer->set_max_depth(max_depth);
 111                 analyzer->set_full_paths(full_paths);
 112         }
 113         else if(!clean && !create_makefile)
 114                 build = true;
 115
 116         const vector<string> &args = getopt.get_args();
 117         for(vector<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
 118         {
 119                 string::size_type equal = i->find('=');
 120                 if(equal!=string::npos)
 121                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 122                 else
 123                         cmdline_targets.push_back(*i);
 124         }
 125
 126         if(cmdline_targets.empty())
 127                 cmdline_targets.push_back("default");
 128
 129         if(!work_dir.empty())
 130                 FS::chdir(work_dir);
 131
 132         cwd = FS::getcwd();
 133
 134         native_arch.set_tool("CC",  "gcc");
 135         native_arch.set_tool("CXX", "g++");
 136         native_arch.set_tool("LD",  "gcc");
 137         native_arch.set_tool("LXX", "g++");
 138         native_arch.set_tool("AR",  "ar");
 139
 140         load_build_file((FS::get_sys_data_dir(argv[0], "builder")/"builderrc").str());
 141         load_build_file((FS::get_user_data_dir("builder")/"rc").str());
 142
 143         if(arch.empty())
 144                 current_arch = &native_arch;
 145         else
 146                 current_arch = new Architecture(*this, arch);
 147
 148         if(!current_arch->is_native())
 149         {
 150                 for(StringMap::const_iterator i=cross_prefixes.begin(); i!=cross_prefixes.end(); ++i)
 151                         if(current_arch->match_name(i->first))
 152                         {
 153                                 current_arch->set_cross_prefix(i->second);
 154                                 break;
 155                         }
 156         }
 157
 158         if(prfx.empty())
 159         {
 160                 if(current_arch->is_native())
 161                         prefix = (FS::get_home_dir()/"local").str();
 162                 else
 163                         prefix = (FS::get_home_dir()/"local"/current_arch->get_name()).str();
 164         }
 165         else
 166                 prefix = FS::getcwd()/prfx;
 167
 168         warnings.push_back("all");
 169         warnings.push_back("extra");
 170         warnings.push_back("shadow");
 171         warnings.push_back("pointer-arith");
 172         warnings.push_back("error");
 173         for(StringList::iterator i=cmdline_warn.begin(); i!=cmdline_warn.end(); ++i)
 174         {
 175                 vector<string> warns = split(*i, ',');
 176                 warnings.insert(warnings.end(), warns.begin(), warns.end());
 177         }
 178
 179         pkg_path.push_back(cwd/".");
 180         pkg_path.push_back(cwd/"..");
 181 }
 182
 183 Builder::~Builder()
 184 {
 185         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 186                 delete i->second;
 187         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 188                 delete i->second;
 189         delete analyzer;
 190 }
 191
 192 int Builder::main()
 193 {
 194         if(prefix.str()!="/usr")
 195         {
 196                 FS::Path pcdir = prefix/"lib"/"pkgconfig";
 197                 if(const char *pcp = getenv("PKG_CONFIG_PATH"))
 198                 {
 199                         vector<string> path = split(pcp, ':');
 200                         bool found = false;
 201                         for(vector<string>::const_iterator i=path.begin(); (!found && i!=path.end()); ++i)
 202                                 found = (*i==pcdir.str());
 203                         if(!found)
 204                         {
 205                                 path.push_back(pcdir.str());
 206                                 setenv("PKG_CONFIG_PATH", join(path.begin(), path.end(), ":").c_str(), true);
 207                         }
 208                 }
 209                 else
 210                         setenv("PKG_CONFIG_PATH", pcdir.str().c_str(), true);
 211         }
 212
 213         if(load_build_file(cwd/build_file))
 214         {
 215                 if(help)
 216                 {
 217                         usage(0, "builder", false);
 218                         return 0;
 219                 }
 220                 else
 221                 {
 222                         IO::print(IO::cerr, "No build info here.\n");
 223                         return 1;
 224                 }
 225         }
 226
 227         main_pkg->configure(cmdline_options, conf_all?2:1);
 228
 229         if(help)
 230         {
 231                 usage(0, "builder", false);
 232                 IO::print("\n");
 233                 package_help();
 234                 return 0;
 235         }
 236
 237         if(conf_only)
 238                 return 0;
 239
 240         if(create_targets())
 241                 return 1;
 242
 243         if(verbose>=2)
 244         {
 245                 IO::print("Building on %s, for %s%s\n", native_arch.get_name(),
 246                         current_arch->get_name(), (current_arch->is_native() ? " (native)" : ""));
 247                 IO::print("Prefix is %s\n", prefix);
 248         }
 249
 250         if(verbose>=1)
 251         {
 252                 unsigned n_packages = 0;
 253                 for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 254                         if(i->second && i->second->is_configured())
 255                                 ++n_packages;
 256                 IO::print("%d active packages, %d targets\n", n_packages, targets.size());
 257         }
 258
 259         if(verbose>=2)
 260         {
 261                 for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 262                 {
 263                         if(!i->second->is_configured())
 264                                 continue;
 265
 266                         IO::print(" %s", i->second->get_name());
 267                         if(dynamic_cast<SourcePackage *>(i->second))
 268                                 IO::print("*");
 269                         unsigned count = 0;
 270                         unsigned to_be_built = 0;
 271                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 272                                 if(j->second->get_package()==i->second)
 273                                 {
 274                                         ++count;
 275                                         if(j->second->get_rebuild())
 276                                                 ++to_be_built;
 277                                 }
 278                         if(count)
 279                         {
 280                                 IO::print(" (%d targets", count);
 281                                 if(to_be_built)
 282                                         IO::print(", %d to be built", to_be_built);
 283                                 IO::print(")");
 284                         }
 285                         IO::print("\n");
 286                 }
 287         }
 288
 289         if(analyzer)
 290                 analyzer->analyze();
 291
 292         if(!problems.empty())
 293         {
 294                 IO::print(IO::cerr, "The following problems were detected:\n");
 295                 for(ProblemList::iterator i=problems.begin(); i!=problems.end(); ++i)
 296                         IO::print(IO::cerr, "  %s: %s\n", i->package, i->descr);
 297                 if(!analyzer)
 298                         IO::print(IO::cerr, "Please fix them and try again.\n");
 299                 return 1;
 300         }
 301
 302         if(clean)
 303                 exit_code = do_clean();
 304         else if(build)
 305                 exit_code = do_build();
 306
 307         return exit_code;
 308 }
 309
 310 string Builder::run_pkgconfig(const string &pkg, const string &what)
 311 {
 312         list<string> argv;
 313         argv.push_back("pkg-config");
 314         if(what=="cflags" || what=="libs")
 315                 argv.push_back("--"+what);
 316         else if(what=="flags")
 317         {
 318                 argv.push_back("--cflags");
 319                 argv.push_back("--libs");
 320         }
 321         else
 322                 argv.push_back("--variable="+what);
 323         argv.push_back(pkg);
 324
 325         if(verbose>=4)
 326                 IO::print("Running %s\n", join(argv.begin(), argv.end()));
 327
 328         int status;
 329         string res = run_command(argv, &status);
 330         if(status)
 331                 throw runtime_error(format("pkg-config for package %s failed", pkg));
 332
 333         return res;
 334 }
 335
 336 Package *Builder::get_package(const string &name)
 337 {
 338         PackageMap::iterator i = packages.find(format("%s/%s", name, current_arch->get_system()));
 339         if(i==packages.end())
 340                 i = packages.find(name);
 341         if(i!=packages.end())
 342                 return i->second;
 343
 344         if(!no_externals)
 345         {
 346                 FS::Path path = get_package_location(name);
 347                 if(!path.empty() && !load_build_file(path/"Build"))
 348                 {
 349                         i = packages.find(name);
 350                         if(i!=packages.end())
 351                                 return i->second;
 352                 }
 353         }
 354
 355         Package *pkg = 0;
 356         try
 357         {
 358                 // Package source not found - create a binary package
 359                 pkg = BinaryPackage::from_pkgconfig(*this, name);
 360         }
 361         catch(...)
 362         {
 363                 problem(name, "not found");
 364         }
 365
 366         packages.insert(PackageMap::value_type(name, pkg));
 367
 368         return pkg;
 369 }
 370
 371 Target *Builder::get_target(const string &n) const
 372 {
 373         TargetMap::const_iterator i = targets.find(n);
 374         if(i!=targets.end())
 375                 return i->second;
 376         return 0;
 377 }
 378
 379 FileTarget *Builder::get_target_by_path(const FS::Path &p) const
 380 {
 381         TargetMap::const_iterator i = targets_by_path.find(p.str());
 382         if(i!=targets_by_path.end())
 383                 return static_cast<FileTarget *>(i->second);
 384         return 0;
 385 }
 386
 387 Target *Builder::get_header(const string &include, const FS::Path &from, const list<string> &path)
 388 {
 389         string hash(8, 0);
 390         if(include[0]=='\"')
 391                 update_hash(hash, from.str());
 392         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 393                 update_hash(hash, *i);
 394
 395         string id = hash+include;
 396         TargetMap::iterator i = includes.find(id);
 397         if(i!=includes.end())
 398                 return i->second;
 399
 400         static string cxx_ver;
 401         if(cxx_ver.empty())
 402         {
 403                 StringList argv;
 404                 argv.push_back(current_arch->get_tool("CXX"));
 405                 argv.push_back("--version");
 406                 if(RegMatch m = Regex("[0-9]\\.[0-9.]+").match(run_command(argv)))
 407                 {
 408                         cxx_ver = m[0].str;
 409                         while(!cxx_ver.empty() && !FS::is_dir(FS::Path("/usr/include/c++")/cxx_ver))
 410                         {
 411                                 string::size_type dot = cxx_ver.rfind('.');
 412                                 if(dot==string::npos)
 413                                         break;
 414                                 cxx_ver.erase(dot);
 415                         }
 416                         if(verbose>=5)
 417                                 IO::print("C++ version is %s\n", cxx_ver);
 418                 }
 419                 else
 420                         cxx_ver = "-";
 421         }
 422
 423         string fn = include.substr(1);
 424         if(verbose>=5)
 425                 IO::print("Looking for include %s from %s with path %s\n", fn, from, join(path.begin(), path.end()));
 426
 427         StringList syspath;
 428         if(current_arch->is_native())
 429                 syspath.push_back("/usr/include");
 430         else
 431                 syspath.push_back("/usr/"+current_arch->get_cross_prefix()+"/include");
 432         if(cxx_ver!="-")
 433                 syspath.push_back((FS::Path("/usr/include/c++/")/cxx_ver).str());
 434
 435         Target *tgt = 0;
 436         if(include[0]=='\"')
 437                 tgt = get_header(FS::Path(from)/fn);
 438         for(list<string>::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 439                 tgt = get_header(cwd/ *j/fn);
 440         for(list<string>::const_iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 441                 tgt = get_header(FS::Path(*j)/fn);
 442
 443         includes.insert(TargetMap::value_type(id, tgt));
 444
 445         return tgt;
 446 }
 447
 448 Target *Builder::get_library(const string &lib, const list<string> &path, LibMode mode)
 449 {
 450         string hash(8, 0);
 451         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 452                 update_hash(hash, *i);
 453
 454         string id = hash+string(1, mode)+lib;
 455         TargetMap::iterator i = libraries.find(id);
 456         if(i!=libraries.end())
 457                 return i->second;
 458
 459         StringList syspath;
 460         if(current_arch->is_native())
 461         {
 462                 syspath.push_back("/lib");
 463                 syspath.push_back("/usr/lib");
 464                 if(current_arch->match_name("pc-32-linux"))
 465                         syspath.push_back("/usr/lib/i386-linux-gnu");
 466                 else if(current_arch->match_name("pc-64-linux"))
 467                         syspath.push_back("/usr/lib/x86_64-linux-gnu");
 468         }
 469         else
 470                 syspath.push_back("/usr/"+current_arch->get_cross_prefix()+"/lib");
 471
 472         if(verbose>=5)
 473                 IO::print("Looking for library %s with path %s\n", lib, join(path.begin(), path.end()));
 474
 475         Target *tgt = 0;
 476         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 477                 tgt = get_library(lib, cwd/ *j, mode);
 478         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 479                 tgt = get_library(lib, *j, mode);
 480
 481         libraries.insert(TargetMap::value_type(id, tgt));
 482
 483         return tgt;
 484 }
 485
 486 void Builder::apply_profile_template(Config &config, const string &pt) const
 487 {
 488         vector<string> parts = split(pt, '-');
 489
 490         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 491         {
 492                 ProfileTemplateMap::const_iterator j = profile_tmpl.find(*i);
 493                 if(j==profile_tmpl.end())
 494                         continue;
 495
 496                 config.update(j->second);
 497         }
 498 }
 499
 500 void Builder::problem(const string &p, const string &d)
 501 {
 502         problems.push_back(Problem(p, d));
 503 }
 504
 505 void Builder::add_target(Target *t)
 506 {
 507         targets.insert(TargetMap::value_type(t->get_name(), t));
 508         new_tgts.push_back(t);
 509 }
 510
 511 void Builder::register_path(const FS::Path &path, FileTarget *t)
 512 {
 513         targets_by_path.insert(TargetMap::value_type(path.str(), t));
 514 }
 515
 516 void Builder::usage(const char *reason, const char *argv0, bool brief)
 517 {
 518         if(reason)
 519                 IO::print(IO::cerr, "%s\n", reason);
 520
 521         if(brief)
 522                 IO::print(IO::cerr, "Usage: %s\n", usagemsg);
 523         else
 524         {
 525                 IO::print(IO::cerr, "Builder 1.0\n\n");
 526                 IO::print(IO::cerr, "Usage: %s [options] [<target> ...]\n\n", argv0);
 527                 IO::print(IO::cerr, "Options:\n");
 528                 IO::print(IO::cerr, helpmsg);
 529         }
 530 }
 531
 532 FS::Path Builder::get_package_location(const string &name)
 533 {
 534         if(verbose>=3)
 535                 IO::print("Looking for package %s\n", name);
 536
 537         try
 538         {
 539                 // Try to get source directory with pkgconfig
 540                 string srcdir = strip(run_pkgconfig(name, "source"));
 541                 if(!srcdir.empty())
 542                         return srcdir;
 543         }
 544         catch(...)
 545         { }
 546
 547         if(pkg_dirs.empty())
 548         {
 549                 for(list<FS::Path>::const_iterator i=pkg_path.begin(); i!=pkg_path.end(); ++i)
 550                 {
 551                         list<string> files = list_files(*i);
 552                         for(list<string>::const_iterator j=files.begin(); j!=files.end(); ++j)
 553                         {
 554                                 FS::Path full = *i / *j;
 555                                 if(FS::exists(full/"Build"))
 556                                         pkg_dirs.push_back(full);
 557                         }
 558                 }
 559                 if(verbose>=3)
 560                         IO::print("%d packages found in path\n", pkg_dirs.size());
 561         }
 562
 563         bool msp = !name.compare(0, 3, "msp");
 564         for(list<FS::Path>::const_iterator i=pkg_dirs.begin(); i!=pkg_dirs.end(); ++i)
 565         {
 566                 string base = basename(*i);
 567                 unsigned dash = base.rfind('-');
 568
 569                 if(!base.compare(0, dash, name))
 570                         return *i;
 571                 else if(msp && !base.compare(0, dash-3, name, 3, string::npos))
 572                         return *i;
 573         }
 574
 575         return FS::Path();
 576 }
 577
 578 int Builder::load_build_file(const FS::Path &fn)
 579 {
 580         try
 581         {
 582                 IO::BufferedFile in(fn.str());
 583
 584                 if(verbose>=3)
 585                         IO::print("Reading %s\n", fn);
 586
 587                 DataFile::Parser parser(in, fn.str());
 588                 Loader loader(*this, fn.subpath(0, fn.size()-1));
 589                 loader.load(parser);
 590         }
 591         catch(const IO::file_not_found &)
 592         {
 593                 return -1;
 594         }
 595
 596         return 0;
 597 }
 598
 599 int Builder::create_targets()
 600 {
 601         Target *world = new VirtualTarget(*this, "world");
 602
 603         Target *def_tgt = new VirtualTarget(*this, "default");
 604         world->add_depend(def_tgt);
 605
 606         Target *install = new VirtualTarget(*this, "install");
 607         world->add_depend(install);
 608
 609         Target *tarballs = new VirtualTarget(*this, "tarballs");
 610         world->add_depend(tarballs);
 611
 612         for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 613         {
 614                 if(!i->second || !i->second->is_configured())
 615                         continue;
 616
 617                 SourcePackage *spkg = dynamic_cast<SourcePackage *>(i->second);
 618                 if(!spkg)
 619                         continue;
 620
 621                 const ComponentList &components = spkg->get_components();
 622                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 623                         j->create_targets();
 624
 625                 if(spkg->get_install_flags()&(SourcePackage::LIB|SourcePackage::INCLUDE))
 626                 {
 627                         PkgConfig *pc = new PkgConfig(*this, *spkg);
 628                         install->add_depend(new Install(*this, *spkg, *pc));
 629                 }
 630         }
 631
 632         // Find dependencies until no new targets are created
 633         while(!new_tgts.empty())
 634         {
 635                 Target *tgt = new_tgts.front();
 636                 new_tgts.erase(new_tgts.begin());
 637                 tgt->find_depends();
 638                 if(!tgt->get_depends_ready())
 639                         new_tgts.push_back(tgt);
 640         }
 641
 642         // Apply what-ifs
 643         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 644         {
 645                 FileTarget *tgt = get_target_by_path(cwd/ *i);
 646                 if(!tgt)
 647                 {
 648                         IO::print(IO::cerr, "Unknown what-if target %s\n", *i);
 649                         return -1;
 650                 }
 651                 tgt->touch();
 652         }
 653
 654         // Make the cmdline target depend on all targets mentioned on the command line
 655         Target *cmdline = new VirtualTarget(*this, "cmdline");
 656         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 657         {
 658                 Target *tgt = get_target(*i);
 659                 if(!tgt)
 660                         tgt = get_target_by_path(*i);
 661                 if(!tgt)
 662                         tgt = get_target_by_path(cwd/ *i);
 663                 if(!tgt)
 664                 {
 665                         IO::print("I don't know anything about %s\n", *i);
 666                         return -1;
 667                 }
 668
 669                 cmdline->add_depend(tgt);
 670         }
 671
 672         cmdline->prepare();
 673
 674         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 675                 if(SourcePackage *spkg = dynamic_cast<SourcePackage *>(i->second))
 676                         spkg->get_deps_cache().save();
 677
 678         return 0;
 679 }
 680
 681 Target *Builder::get_header(const FS::Path &fn)
 682 {
 683         Target *tgt = get_target_by_path(fn);
 684         if(tgt) return tgt;
 685
 686         if(FS::is_reg(fn))
 687         {
 688                 tgt = new SystemHeader(*this, fn.str());
 689                 return tgt;
 690         }
 691         return 0;
 692 }
 693
 694 Target *Builder::get_library(const string &lib, const FS::Path &path, LibMode mode)
 695 {
 696         // Populate a list of candidate filenames
 697         StringList candidates;
 698
 699         if(mode!=ALL_STATIC)
 700         {
 701                 // XXX Should probably let the Architecture populate the list
 702                 if(current_arch->get_system()=="windows")
 703                 {
 704                         candidates.push_back("lib"+lib+".dll");
 705                         candidates.push_back(lib+".dll");
 706                 }
 707                 else
 708                         candidates.push_back("lib"+lib+".so");
 709         }
 710
 711         /* Static libraries are always considered, since sometimes shared versions
 712         may not be available */
 713         candidates.push_back("lib"+lib+".a");
 714         if(current_arch->get_system()=="windows")
 715                 candidates.push_back("lib"+lib+".dll.a");
 716
 717         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 718         {
 719                 FS::Path full = path/ *i;
 720                 Target *tgt = get_target_by_path(full);
 721
 722                 if(tgt)
 723                 {
 724                         Target *real_tgt = tgt->get_real_target();
 725
 726                         /* Ignore dynamic libraries from local packages unless library mode is
 727                         DYNAMIC */
 728                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 729                                 continue;
 730                         else if(tgt)
 731                                 return tgt;
 732                 }
 733                 else if(FS::is_reg(full))
 734                 {
 735                         tgt = new SystemLibrary(*this, full.str());
 736                         return tgt;
 737                 }
 738         }
 739
 740         return 0;
 741 }
 742
 743 int Builder::do_build()
 744 {
 745         Target *cmdline = get_target("cmdline");
 746
 747         unsigned total = 0;
 748         for(map<string, Target *>::const_iterator i=targets.begin(); i!=targets.end(); ++i)
 749                 if(i->second->is_buildable() && i->second->get_rebuild())
 750                         ++total;
 751
 752         if(!total)
 753         {
 754                 IO::print("Already up to date\n");
 755                 return 0;
 756         }
 757         if(verbose>=1)
 758                 IO::print("Will build %d target%s\n", total, (total!=1 ? "s" : ""));
 759
 760         vector<Action *> actions;
 761
 762         unsigned count = 0;
 763
 764         bool fail = false;
 765         bool finish = false;
 766
 767         while(!finish)
 768         {
 769                 if(actions.size()<jobs && !fail)
 770                 {
 771                         Target *tgt = cmdline->get_buildable_target();
 772                         if(tgt)
 773                         {
 774                                 Action *action = tgt->build();
 775                                 if(action)
 776                                         actions.push_back(action);
 777
 778                                 if(show_progress)
 779                                         IO::print("%d of %d target%s built\033[1G", count, total, (total!=1 ? "s" : ""));
 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                 IO::print("\033[K");
 808         if(fail)
 809                 IO::print("Build failed\n");
 810         else if(show_progress)
 811                 IO::print("Build complete\n");
 812
 813         return fail;
 814 }
 815
 816 int Builder::do_clean()
 817 {
 818         // Cleaning doesn't care about ordering, so a simpler method can be used
 819
 820         set<Target *> clean_tgts;
 821         TargetList queue;
 822         queue.push_back(get_target("cmdline"));
 823
 824         while(!queue.empty())
 825         {
 826                 Target *tgt = queue.front();
 827                 queue.erase(queue.begin());
 828
 829                 if(tgt->is_buildable() && (tgt->get_package()==main_pkg || clean>=2))
 830                         clean_tgts.insert(tgt);
 831
 832                 const TargetList &deps = tgt->get_depends();
 833                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 834                         if(!clean_tgts.count(*i))
 835                                 queue.push_back(*i);
 836         }
 837
 838         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 839                 if(FileTarget *ft = dynamic_cast<FileTarget *>(*i))
 840                 {
 841                         Action *action = new Unlink(*this, *ft);
 842                         while(action->check()<0) ;
 843                         delete action;
 844                 }
 845
 846         return 0;
 847 }
 848
 849 void Builder::package_help()
 850 {
 851         const Config &config = main_pkg->get_config();
 852         const Config::OptionMap &options = config.get_options();
 853
 854         IO::print("Required packages:\n  ");
 855         const PackageList &requires = main_pkg->get_requires();
 856         for(PackageList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 857         {
 858                 if(i!=requires.begin())
 859                         IO::print(", ");
 860                 IO::print((*i)->get_name());
 861         }
 862         IO::print("\n\nPackage configuration:\n");
 863         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 864         {
 865                 const Config::Option &opt = i->second;
 866                 IO::print("  %s: %s (%s)", opt.name, opt.descr, opt.value);
 867                 if(opt.value!=opt.defv)
 868                         IO::print(" [%s]", opt.defv);
 869                 IO::print("\n");
 870         }
 871 }
 872
 873 string Builder::usagemsg;
 874 string Builder::helpmsg;
 875
 876
 877 Builder::Loader::Loader(Builder &b, const FS::Path &s):
 878         bld(b),
 879         src(s)
 880 {
 881         add("binary_package", &Loader::binpkg);
 882         add("cross_prefix", &Loader::cross_prefix);
 883         add("profile", &Loader::profile);
 884         add("package", &Loader::package);
 885 }
 886
 887 void Builder::Loader::binpkg(const string &n)
 888 {
 889         BinaryPackage *pkg = new BinaryPackage(bld, n);
 890         load_sub(*pkg);
 891         bld.packages.insert(PackageMap::value_type(n, pkg));
 892 }
 893
 894 void Builder::Loader::cross_prefix(const string &a, const string &p)
 895 {
 896         bld.cross_prefixes[a] = p;
 897 }
 898
 899 void Builder::Loader::profile(const string &n)
 900 {
 901         StringMap prf;
 902         ProfileLoader ldr(prf);
 903         load_sub_with(ldr);
 904         bld.profile_tmpl.insert(ProfileTemplateMap::value_type(n, prf));
 905 }
 906
 907 void Builder::Loader::package(const string &n)
 908 {
 909         SourcePackage *pkg = new SourcePackage(bld, n, src);
 910         if(!bld.main_pkg)
 911                 bld.main_pkg = pkg;
 912
 913         load_sub(*pkg);
 914         bld.packages.insert(PackageMap::value_type(n, pkg));
 915 }
 916
 917
 918 Builder::ProfileLoader::ProfileLoader(StringMap &p):
 919         profile(p)
 920 {
 921         add("option", &ProfileLoader::option);
 922 }
 923
 924 void Builder::ProfileLoader::option(const string &o, const string &v)
 925 {
 926         profile.insert(StringMap::value_type(o, v));
 927 }