source/target.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2009  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/fs/stat.h>
   9 #include <msp/fs/utils.h>
  10 #include <msp/time/utils.h>
  11 #include "action.h"
  12 #include "builder.h"
  13 #include "package.h"
  14 #include "sourcepackage.h"
  15 #include "target.h"
  16
  17 using namespace std;
  18 using namespace Msp;
  19
  20 Target::Target(Builder &b, const Package *p, const string &n):
  21         builder(b),
  22         package(p),
  23         name(n),
  24         buildable(false),
  25         building(false),
  26         rebuild(false),
  27         deps_ready(false),
  28         prepared(false),
  29         counted(false)
  30 {
  31         builder.add_target(this);
  32
  33         struct stat st;
  34         if(!FS::stat(name, st))
  35                 mtime=Time::TimeStamp::from_unixtime(st.st_mtime);
  36 }
  37
  38 Target *Target::get_buildable_target()
  39 {
  40         if(!rebuild)
  41                 return 0;
  42
  43         bool self_ok=!building;
  44         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
  45         {
  46                 Target *tgt=(*i)->get_buildable_target();
  47                 if(tgt)
  48                         return tgt;
  49                 else if((*i)->get_rebuild())
  50                         self_ok=false;
  51         }
  52
  53         if(self_ok)
  54                 return this;
  55
  56         return 0;
  57 }
  58
  59 void Target::add_depend(Target *dep)
  60 {
  61         if(dep==this)
  62                 throw InvalidParameterValue("A target can't depend on itself");
  63         depends.push_back(dep);
  64         dep->rdepends.push_back(this);
  65 }
  66
  67 void Target::prepare()
  68 {
  69         if(prepared)
  70                 return;
  71
  72         prepared=true;
  73         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
  74                 (*i)->prepare();
  75
  76         check_rebuild();
  77
  78 }
  79
  80 Action *Target::build()
  81 {
  82         if(!buildable)
  83         {
  84                 rebuild=false;
  85                 return 0;
  86         }
  87
  88         if(!builder.get_dry_run() && FS::exists(name))
  89                 FS::unlink(name);
  90
  91         Action *action=create_action();
  92         if(action)
  93         {
  94                 action->signal_done.connect(sigc::mem_fun(this, &Target::build_done));
  95
  96                 building=true;
  97         }
  98
  99         return action;
 100 }
 101
 102 unsigned Target::count_rebuild()
 103 {
 104         if(counted)
 105                 return 0;
 106
 107         counted=true;
 108         unsigned count=rebuild;
 109         for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
 110                 count+=(*i)->count_rebuild();
 111         return count;
 112 }
 113
 114 void Target::touch()
 115 {
 116         mtime=Time::now();
 117 }
 118
 119 void Target::mark_rebuild(const std::string &reason)
 120 {
 121         rebuild=true;
 122         rebuild_reason=reason;
 123 }
 124
 125 void Target::check_rebuild()
 126 {
 127         if(!buildable)
 128                 return;
 129
 130         if(builder.get_build_all())
 131                 mark_rebuild("Rebuilding everything");
 132         else if(!mtime)
 133                 mark_rebuild("Does not exist");
 134         else
 135         {
 136                 for(TargetList::iterator i=depends.begin(); (i!=depends.end() && !rebuild); ++i)
 137                 {
 138                         if((*i)->get_mtime()>mtime)
 139                                 mark_rebuild(FS::basename((*i)->get_name())+" has changed");
 140                         else if((*i)->get_rebuild())
 141                                 mark_rebuild(FS::basename((*i)->get_name())+" needs rebuilding");
 142                 }
 143         }
 144
 145         const SourcePackage *spkg=dynamic_cast<const SourcePackage *>(package);
 146         if(!rebuild && spkg && spkg->get_config().get_mtime()>mtime)
 147                 mark_rebuild("Package options changed");
 148 }
 149
 150 void Target::build_done()
 151 {
 152         building=false;
 153         rebuild=false;
 154 }