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         deps_ready(false)
  21 {
  22         builder.add_target(this);
  23 }
  24
  25 Target *Target::get_buildable_target()
  26 {
  27         if(!needs_rebuild())
  28                 return 0;
  29
  30         bool self_ok = state!=BUILDING;
  31         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  32         {
  33                 Target *tgt = (*i)->get_buildable_target();
  34                 if(tgt)
  35                         return tgt;
  36                 else if((*i)->needs_rebuild())
  37                         self_ok = false;
  38         }
  39
  40         if(self_ok)
  41                 return this;
  42
  43         return 0;
  44 }
  45
  46 void Target::set_tool(const Tool &t)
  47 {
  48         tool = &t;
  49 }
  50
  51 void Target::add_depend(Target *dep)
  52 {
  53         if(dep==this)
  54                 throw invalid_argument("Target::add_depend");
  55         depends.push_back(dep);
  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         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  70                 (*i)->prepare();
  71
  72         check_rebuild();
  73         if(state==PREPARING)
  74                 state = UPTODATE;
  75 }
  76
  77 Task *Target::build()
  78 {
  79         if(!tool)
  80         {
  81                 state = UPTODATE;
  82                 return 0;
  83         }
  84
  85         // XXX Minor breach of OO here
  86         if(FileTarget *ft = dynamic_cast<FileTarget *>(this))
  87                 if(!builder.get_dry_run() && FS::exists(ft->get_path()))
  88                         FS::unlink(ft->get_path());
  89
  90         Task *task = tool->run(*this);
  91         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
  92         state = BUILDING;
  93
  94         return task;
  95 }
  96
  97 void Target::mark_rebuild(const std::string &reason)
  98 {
  99         state = REBUILD;
 100         rebuild_reason = reason;
 101 }
 102
 103 void Target::build_finished(bool /*success*/)
 104 {
 105         state = UPTODATE;
 106 }