source/target.cpp

   1 #include <msp/fs/stat.h>
   2 #include <msp/fs/utils.h>
   3 #include "builder.h"
   4 #include "filetarget.h"
   5 #include "package.h"
   6 #include "target.h"
   7 #include "task.h"
   8 #include "tool.h"
   9
  10 using namespace std;
  11 using namespace Msp;
  12
  13 Target::Target(Builder &b, const string &n):
  14         builder(b),
  15         package(0),
  16         component(0),
  17         name(n),
  18         tool(0),
  19         state(INIT)
  20 {
  21         builder.add_target(this);
  22 }
  23
  24 Target *Target::get_buildable_target()
  25 {
  26         if(!needs_rebuild())
  27                 return 0;
  28
  29         bool self_ok = state!=BUILDING;
  30         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  31         {
  32                 Target *tgt = (*i)->get_buildable_target();
  33                 if(tgt)
  34                         return tgt;
  35                 else if((*i)->needs_rebuild())
  36                         self_ok = false;
  37         }
  38
  39         if(self_ok)
  40                 return this;
  41
  42         return 0;
  43 }
  44
  45 void Target::set_tool(const Tool &t)
  46 {
  47         tool = &t;
  48 }
  49
  50 void Target::add_depend(Target *dep)
  51 {
  52         if(dep==this)
  53                 throw invalid_argument("Target::add_depend");
  54         depends.push_back(dep);
  55         dep->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  56 }
  57
  58 void Target::prepare()
  59 {
  60         if(state>PREPARING)
  61                 return;
  62         if(state==PREPARING)
  63         {
  64                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  65                 return;
  66         }
  67
  68         state = PREPARING;
  69         find_depends();
  70
  71         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  72                 (*i)->prepare();
  73
  74         check_rebuild();
  75         if(state==PREPARING)
  76                 state = UPTODATE;
  77 }
  78
  79 Task *Target::build()
  80 {
  81         if(!tool)
  82         {
  83                 state = UPTODATE;
  84                 return 0;
  85         }
  86
  87         // XXX Minor breach of OO here
  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         Task *task = tool->run(*this);
  93         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
  94         state = BUILDING;
  95
  96         return task;
  97 }
  98
  99 void Target::mark_rebuild(const std::string &reason)
 100 {
 101         if(reason.empty())
 102                 throw invalid_argument("No reason given for rebuilding "+name);
 103
 104         state = REBUILD;
 105         rebuild_reason = reason;
 106         signal_bubble_rebuild.emit();
 107 }
 108
 109 void Target::build_finished(bool /*success*/)
 110 {
 111         state = UPTODATE;
 112 }