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 "action.h"
  11 #include "builder.h"
  12 #include "filetarget.h"
  13 #include "package.h"
  14 #include "target.h"
  15
  16 using namespace std;
  17 using namespace Msp;
  18
  19 Target::Target(Builder &b, const Package *p, const string &n):
  20         builder(b),
  21         package(p),
  22         name(n),
  23         buildable(false),
  24         building(false),
  25         rebuild(false),
  26         deps_ready(false),
  27         preparing(false),
  28         prepared(false)
  29 { }
  30
  31 Target *Target::get_buildable_target()
  32 {
  33         if(!rebuild)
  34                 return 0;
  35
  36         bool self_ok = !building;
  37         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
  38         {
  39                 Target *tgt = (*i)->get_buildable_target();
  40                 if(tgt)
  41                         return tgt;
  42                 else if((*i)->get_rebuild())
  43                         self_ok = false;
  44         }
  45
  46         if(self_ok)
  47                 return this;
  48
  49         return 0;
  50 }
  51
  52 void Target::add_depend(Target *dep)
  53 {
  54         if(dep==this)
  55                 throw InvalidParameterValue("A target can't depend on itself");
  56         depends.push_back(dep);
  57 }
  58
  59 void Target::prepare()
  60 {
  61         if(prepared)
  62                 return;
  63         if(preparing)
  64         {
  65                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  66                 return;
  67         }
  68
  69         preparing = true;
  70         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
  71                 (*i)->prepare();
  72
  73         check_rebuild();
  74         preparing = false;
  75         prepared = true;
  76 }
  77
  78 Action *Target::build()
  79 {
  80         if(!buildable)
  81         {
  82                 rebuild = false;
  83                 return 0;
  84         }
  85
  86         // XXX Minor breach of OO here
  87         if(FileTarget *ft = dynamic_cast<FileTarget *>(this))
  88                 if(!builder.get_dry_run() && FS::exists(ft->get_path()))
  89                         FS::unlink(ft->get_path());
  90
  91         Action *action = create_action();
  92         if(action)
  93         {
  94                 action->signal_done.connect(sigc::mem_fun(this, &Target::build_done));
  95
  96                 building = true;
  97         }
  98
  99         return action;
 100 }
 101
 102 void Target::mark_rebuild(const std::string &reason)
 103 {
 104         rebuild = true;
 105         rebuild_reason = reason;
 106 }
 107
 108 void Target::build_done()
 109 {
 110         building = false;
 111         rebuild = false;
 112 }