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 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         if(state>PREPARING)
  64                 dep->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  65 }
  66
  67 void Target::prepare()
  68 {
  69         if(state>PREPARING)
  70                 return;
  71         if(state==PREPARING)
  72         {
  73                 builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
  74                 return;
  75         }
  76
  77         state = PREPARING;
  78         find_depends();
  79         if(tool)
  80         {
  81                 if(FileTarget *tool_exe = tool->get_executable())
  82                         add_depend(tool_exe);
  83         }
  84
  85         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  86                 (*i)->prepare();
  87
  88         check_rebuild();
  89         if(state==PREPARING)
  90                 state = UPTODATE;
  91
  92         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  93                 (*i)->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  94 }
  95
  96 Task *Target::build()
  97 {
  98         if(!tool)
  99         {
 100                 // This special case is needed for VirtualTargets
 101                 state = UPTODATE;
 102                 return 0;
 103         }
 104
 105         // XXX Minor breach of OO here
 106         if(FileTarget *ft = dynamic_cast<FileTarget *>(this))
 107                 if(!builder.get_dry_run() && FS::exists(ft->get_path()))
 108                         FS::unlink(ft->get_path());
 109
 110         Task *task = tool->run(*this);
 111         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
 112         state = BUILDING;
 113
 114         return task;
 115 }
 116
 117 void Target::mark_rebuild(const string &reason)
 118 {
 119         if(reason.empty())
 120                 throw invalid_argument("No reason given for rebuilding "+name);
 121
 122         state = REBUILD;
 123         rebuild_reason = reason;
 124
 125         builder.get_logger().log("rebuild", format("Rebuilding %s: %s", name, reason));
 126
 127         signal_bubble_rebuild.emit();
 128 }
 129
 130 void Target::build_finished(bool /*success*/)
 131 {
 132         state = UPTODATE;
 133 }