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