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 "sourcepackage.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 void Target::add_dependency(Target &dep)
  26 {
  27         if(&dep==this)
  28                 throw invalid_argument("Target::add_depend");
  29         depends.push_back(&dep);
  30         if(state>PREPARING)
  31                 dep.signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  32 }
  33
  34 Target *Target::get_buildable_target()
  35 {
  36         if(!needs_rebuild())
  37                 return 0;
  38
  39         bool self_ok = state!=BUILDING;
  40         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  41         {
  42                 Target *tgt = (*i)->get_buildable_target();
  43                 if(tgt)
  44                         return tgt;
  45                 else if((*i)->needs_rebuild())
  46                         self_ok = false;
  47         }
  48
  49         if(self_ok)
  50                 return this;
  51
  52         return 0;
  53 }
  54
  55 void Target::set_tool(const Tool &t)
  56 {
  57         tool = &t;
  58 }
  59
  60 void Target::force_rebuild()
  61 {
  62         if(!is_buildable())
  63                 throw logic_error("Target::force_rebuild");
  64         mark_rebuild("Forced rebuild");
  65 }
  66
  67 void Target::mark_rebuild(const string &reason)
  68 {
  69         if(reason.empty())
  70                 throw invalid_argument("No reason given for rebuilding "+name);
  71
  72         state = REBUILD;
  73         rebuild_reason = reason;
  74
  75         builder.get_logger().log("rebuild", format("Rebuilding %s: %s", name, reason));
  76
  77         signal_bubble_rebuild.emit();
  78 }
  79
  80 void Target::prepare()
  81 {
  82         if(state>PREPARING)
  83                 return;
  84         if(state==PREPARING)
  85         {
  86                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  87                 return;
  88         }
  89
  90         state = PREPARING;
  91         find_dependencies();
  92         if(tool)
  93         {
  94                 if(FileTarget *tool_exe = tool->get_executable())
  95                         add_dependency(*tool_exe);
  96         }
  97
  98         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  99                 (*i)->prepare();
 100
 101         check_rebuild();
 102         if(state==PREPARING)
 103                 state = UPTODATE;
 104
 105         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
 106                 (*i)->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
 107 }
 108
 109 Task *Target::build()
 110 {
 111         if(!tool)
 112         {
 113                 // This special case is needed for VirtualTargets
 114                 state = UPTODATE;
 115                 return 0;
 116         }
 117
 118         Task *task = tool->run(*this);
 119         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
 120         state = BUILDING;
 121
 122         return task;
 123 }
 124
 125 void Target::build_finished(bool /*success*/)
 126 {
 127         state = UPTODATE;
 128 }