source/target.cpp

   1 #include <algorithm>
   2 #include <msp/fs/stat.h>
   3 #include <msp/fs/utils.h>
   4 #include <msp/strings/format.h>
   5 #include "builder.h"
   6 #include "filetarget.h"
   7 #include "sourcepackage.h"
   8 #include "target.h"
   9 #include "task.h"
  10 #include "tool.h"
  11
  12 using namespace std;
  13 using namespace Msp;
  14
  15 Target::Target(Builder &b, const string &n):
  16         builder(b),
  17         package(0),
  18         component(0),
  19         name(n),
  20         tool(0),
  21         state(INIT),
  22         primary_target(0)
  23 {
  24         builder.get_build_graph().add_target(this);
  25 }
  26
  27 void Target::add_dependency(Target &dep)
  28 {
  29         if(&dep==this)
  30                 throw invalid_argument("Target::add_depend");
  31         depends.push_back(&dep);
  32         if(state>PREPARING)
  33                 dep.signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  34 }
  35
  36 void Target::add_transitive_dependency(Target &dep)
  37 {
  38         if(&dep==this)
  39                 throw invalid_argument("Target::add_transitive_dependency");
  40         trans_depends.push_back(&dep);
  41 }
  42
  43 void Target::add_side_effect(Target &se)
  44 {
  45         side_effects.push_back(&se);
  46         if(tool)
  47                 se.set_tool(*tool);
  48         se.primary_target = this;
  49         /* Side effects are checked for rebuild after the primary target.  Recheck
  50         the primary if a side effect is marked for rebuild. */
  51         se.signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  52 }
  53
  54 Target *Target::get_buildable_target()
  55 {
  56         if(primary_target)
  57                 return primary_target->get_buildable_target();
  58         if(!needs_rebuild())
  59                 return 0;
  60
  61         bool self_ok = state!=BUILDING;
  62         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
  63         {
  64                 // Avoid infinite recursion if a target repends on its own side effect
  65                 if(find(side_effects.begin(), side_effects.end(), *i)!=side_effects.end())
  66                         continue;
  67
  68                 Target *tgt = (*i)->get_buildable_target();
  69                 if(tgt)
  70                         return tgt;
  71                 else if((*i)->needs_rebuild())
  72                         self_ok = false;
  73         }
  74
  75         if(self_ok)
  76                 return this;
  77
  78         return 0;
  79 }
  80
  81 void Target::set_tool(Tool &t)
  82 {
  83         tool = &t;
  84         for(Dependencies::const_iterator i=side_effects.begin(); i!=side_effects.end(); ++i)
  85                 (*i)->set_tool(t);
  86 }
  87
  88 void Target::force_rebuild()
  89 {
  90         if(!is_buildable())
  91                 throw logic_error("Target::force_rebuild");
  92         mark_rebuild("Forced rebuild");
  93 }
  94
  95 void Target::mark_rebuild(const string &reason)
  96 {
  97         if(reason.empty())
  98                 throw invalid_argument("No reason given for rebuilding "+name);
  99
 100         state = REBUILD;
 101         rebuild_reason = reason;
 102
 103         builder.get_logger().log("rebuild", format("Rebuilding %s: %s", name, reason));
 104
 105         signal_bubble_rebuild.emit();
 106 }
 107
 108 void Target::prepare()
 109 {
 110         if(state>PREPARING)
 111                 return;
 112         if(state==PREPARING)
 113         {
 114                 problems.push_back("Dependency cycle detected");
 115                 state = BROKEN;
 116                 return;
 117         }
 118
 119         state = PREPARING;
 120         if(tool)
 121                 tool->prepare();
 122
 123         find_dependencies();
 124         bool broken = !problems.empty();
 125
 126         if(tool)
 127         {
 128                 if(FileTarget *tool_exe = tool->get_executable())
 129                         add_dependency(*tool_exe);
 130                 broken |= !tool->get_problems().empty();
 131
 132                 // Only check package and component problems for buildable targets
 133                 // XXX How to propagate nested package problems?
 134                 broken |= (package && !package->get_problems().empty());
 135                 broken |= (component && !component->get_problems().empty());
 136         }
 137
 138         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
 139         {
 140                 (*i)->prepare();
 141                 broken |= (*i)->is_broken();
 142         }
 143
 144         check_rebuild();
 145         if(broken)
 146                 state = BROKEN;
 147         else if(state==PREPARING)
 148                 state = UPTODATE;
 149
 150         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
 151                 (*i)->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
 152 }
 153
 154 Task *Target::build()
 155 {
 156         if(primary_target)
 157                 return primary_target->build();
 158
 159         Task *task = tool->run(*this);
 160         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
 161         state = BUILDING;
 162
 163         build(*task);
 164         for(Dependencies::const_iterator i=side_effects.begin(); i!=side_effects.end(); ++i)
 165                 (*i)->build(*task);
 166
 167         return task;
 168 }
 169
 170 void Target::build_finished(bool success)
 171 {
 172         state = UPTODATE;
 173         if(success)
 174         {
 175                 modified();
 176                 for(Dependencies::const_iterator i=side_effects.begin(); i!=side_effects.end(); ++i)
 177                         (*i)->build_finished(success);
 178                 signal_modified.emit();
 179         }
 180 }