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