source/target.cpp

   1 #include <msp/fs/stat.h>
   2 #include <msp/fs/utils.h>
   3 #include <msp/strings/format.h>
   4 #include "builder.h"
   5 #include "filetarget.h"
   6 #include "package.h"
   7 #include "target.h"
   8 #include "task.h"
   9 #include "tool.h"
  10
  11 using namespace std;
  12 using namespace Msp;
  13
  14 Target::Target(Builder &b, const string &n):
  15         builder(b),
  16         package(0),
  17         component(0),
  18         name(n),
  19         tool(0),
  20         state(INIT)
  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::force_rebuild()
  52 {
  53         if(!is_buildable())
  54                 throw logic_error("Target::force_rebuild");
  55         mark_rebuild("Forced rebuild");
  56 }
  57
  58 void Target::add_depend(Target *dep)
  59 {
  60         if(dep==this)
  61                 throw invalid_argument("Target::add_depend");
  62         depends.push_back(dep);
  63         dep->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  64 }
  65
  66 void Target::prepare()
  67 {
  68         if(state>PREPARING)
  69                 return;
  70         if(state==PREPARING)
  71         {
  72                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  73                 return;
  74         }
  75
  76         state = PREPARING;
  77         find_depends();
  78
  79         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  80                 (*i)->prepare();
  81
  82         check_rebuild();
  83         if(state==PREPARING)
  84                 state = UPTODATE;
  85 }
  86
  87 Task *Target::build()
  88 {
  89         if(!tool)
  90         {
  91                 state = UPTODATE;
  92                 return 0;
  93         }
  94
  95         // XXX Minor breach of OO here
  96         if(FileTarget *ft = dynamic_cast<FileTarget *>(this))
  97                 if(!builder.get_dry_run() && FS::exists(ft->get_path()))
  98                         FS::unlink(ft->get_path());
  99
 100         Task *task = tool->run(*this);
 101         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
 102         state = BUILDING;
 103
 104         return task;
 105 }
 106
 107 void Target::mark_rebuild(const std::string &reason)
 108 {
 109         if(reason.empty())
 110                 throw invalid_argument("No reason given for rebuilding "+name);
 111
 112         state = REBUILD;
 113         rebuild_reason = reason;
 114         signal_bubble_rebuild.emit();
 115
 116         builder.get_logger().log("rebuild", format("Rebuilding %s: %s", name, reason));
 117 }
 118
 119 void Target::build_finished(bool /*success*/)
 120 {
 121         state = UPTODATE;
 122 }