source/target.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2009  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/fs/stat.h>
   9 #include <msp/fs/utils.h>
  10 #include <msp/time/utils.h>
  11 #include "action.h"
  12 #include "builder.h"
  13 #include "filetarget.h"
  14 #include "package.h"
  15 #include "sourcepackage.h"
  16 #include "target.h"
  17
  18 using namespace std;
  19 using namespace Msp;
  20
  21 Target::Target(Builder &b, const Package *p, const string &n):
  22         builder(b),
  23         package(p),
  24         name(n),
  25         buildable(false),
  26         building(false),
  27         rebuild(false),
  28         deps_ready(false),
  29         preparing(false),
  30         prepared(false)
  31 { }
  32
  33 Target *Target::get_buildable_target()
  34 {
  35         if(!rebuild)
  36                 return 0;
  37
  38         bool self_ok = !building;
  39         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
  40         {
  41                 Target *tgt = (*i)->get_buildable_target();
  42                 if(tgt)
  43                         return tgt;
  44                 else if((*i)->get_rebuild())
  45                         self_ok = false;
  46         }
  47
  48         if(self_ok)
  49                 return this;
  50
  51         return 0;
  52 }
  53
  54 void Target::add_depend(Target *dep)
  55 {
  56         if(dep==this)
  57                 throw InvalidParameterValue("A target can't depend on itself");
  58         depends.push_back(dep);
  59 }
  60
  61 void Target::prepare()
  62 {
  63         if(prepared)
  64                 return;
  65         if(preparing)
  66         {
  67                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  68                 return;
  69         }
  70
  71         preparing = true;
  72         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
  73                 (*i)->prepare();
  74
  75         check_rebuild();
  76         preparing = false;
  77         prepared = true;
  78 }
  79
  80 Action *Target::build()
  81 {
  82         if(!buildable)
  83         {
  84                 rebuild = false;
  85                 return 0;
  86         }
  87
  88         if(FileTarget *ft = dynamic_cast<FileTarget *>(this))
  89                 if(!builder.get_dry_run() && FS::exists(ft->get_path()))
  90                         FS::unlink(ft->get_path());
  91
  92         Action *action = create_action();
  93         if(action)
  94         {
  95                 action->signal_done.connect(sigc::mem_fun(this, &Target::build_done));
  96
  97                 building = true;
  98         }
  99
 100         return action;
 101 }
 102
 103 void Target::touch()
 104 {
 105         mtime = Time::now();
 106 }
 107
 108 void Target::mark_rebuild(const std::string &reason)
 109 {
 110         rebuild = true;
 111         rebuild_reason = reason;
 112 }
 113
 114 void Target::check_rebuild()
 115 {
 116         if(!buildable)
 117                 return;
 118
 119         if(builder.get_build_all())
 120                 mark_rebuild("Rebuilding everything");
 121         else if(!mtime)
 122                 mark_rebuild("Does not exist");
 123         else
 124         {
 125                 for(TargetList::iterator i=depends.begin(); (i!=depends.end() && !rebuild); ++i)
 126                 {
 127                         if((*i)->get_mtime()>mtime)
 128                                 mark_rebuild((*i)->get_name()+" has changed");
 129                         else if((*i)->get_rebuild())
 130                                 mark_rebuild((*i)->get_name()+" needs rebuilding");
 131                 }
 132         }
 133
 134         const SourcePackage *spkg = dynamic_cast<const SourcePackage *>(package);
 135         if(!rebuild && spkg && spkg->get_config().get_mtime()>mtime)
 136                 mark_rebuild("Package options changed");
 137 }
 138
 139 void Target::build_done()
 140 {
 141         building = false;
 142         rebuild = false;
 143 }