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 Package *p, const string &n):
  14         builder(b),
  15         package(p),
  16         name(n),
  17         tool(0),
  18         building(false),
  19         rebuild(false),
  20         deps_ready(false),
  21         preparing(false),
  22         prepared(false)
  23 {
  24         builder.add_target(this);
  25 }
  26
  27 Target *Target::get_buildable_target()
  28 {
  29         if(!rebuild)
  30                 return 0;
  31
  32         bool self_ok = !building;
  33         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  34         {
  35                 Target *tgt = (*i)->get_buildable_target();
  36                 if(tgt)
  37                         return tgt;
  38                 else if((*i)->get_rebuild())
  39                         self_ok = false;
  40         }
  41
  42         if(self_ok)
  43                 return this;
  44
  45         return 0;
  46 }
  47
  48 void Target::set_tool(const Tool &t)
  49 {
  50         tool = &t;
  51 }
  52
  53 void Target::add_depend(Target *dep)
  54 {
  55         if(dep==this)
  56                 throw invalid_argument("Target::add_depend");
  57         depends.push_back(dep);
  58 }
  59
  60 void Target::prepare()
  61 {
  62         if(prepared)
  63                 return;
  64         if(preparing)
  65         {
  66                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  67                 return;
  68         }
  69
  70         preparing = true;
  71         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  72                 (*i)->prepare();
  73
  74         check_rebuild();
  75         preparing = false;
  76         prepared = true;
  77 }
  78
  79 Task *Target::build()
  80 {
  81         if(!tool)
  82         {
  83                 rebuild = false;
  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         building = true;
  95
  96         return task;
  97 }
  98
  99 void Target::mark_rebuild(const std::string &reason)
 100 {
 101         rebuild = true;
 102         rebuild_reason = reason;
 103 }
 104
 105 void Target::build_finished(bool /*success*/)
 106 {
 107         building = false;
 108         rebuild = false;
 109 }