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 }
  56
  57 void Target::prepare()
  58 {
  59         if(state>PREPARING)
  60                 return;
  61         if(state==PREPARING)
  62         {
  63                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  64                 return;
  65         }
  66
  67         state = PREPARING;
  68         find_depends();
  69
  70         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  71                 (*i)->prepare();
  72
  73         check_rebuild();
  74         if(state==PREPARING)
  75                 state = UPTODATE;
  76 }
  77
  78 Task *Target::build()
  79 {
  80         if(!tool)
  81         {
  82                 state = UPTODATE;
  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         Task *task = tool->run(*this);
  92         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
  93         state = BUILDING;
  94
  95         return task;
  96 }
  97
  98 void Target::mark_rebuild(const std::string &reason)
  99 {
 100         state = REBUILD;
 101         rebuild_reason = reason;
 102 }
 103
 104 void Target::build_finished(bool /*success*/)
 105 {
 106         state = UPTODATE;
 107 }