source/target.cpp

   1 #include <msp/core/algorithm.h>
   2 #include <msp/fs/stat.h>
   3 #include <msp/fs/utils.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         primary_target(0)
  22 {
  23         builder.get_build_graph().add_target(this);
  24 }
  25
  26 void Target::add_dependency(Target &dep)
  27 {
  28         if(&dep==this)
  29                 throw invalid_argument("Target::add_depend");
  30         depends.push_back(&dep);
  31         if(state>PREPARING)
  32                 dep.signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  33 }
  34
  35 void Target::add_transitive_dependency(Target &dep)
  36 {
  37         if(&dep==this)
  38                 throw invalid_argument("Target::add_transitive_dependency");
  39         trans_depends.push_back(&dep);
  40 }
  41
  42 void Target::add_side_effect(Target &se)
  43 {
  44         side_effects.push_back(&se);
  45         if(tool)
  46                 se.set_tool(*tool);
  47         se.primary_target = this;
  48         /* Side effects are checked for rebuild after the primary target.  Recheck
  49         the primary if a side effect is marked for rebuild. */
  50         se.signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
  51 }
  52
  53 Target *Target::get_buildable_target()
  54 {
  55         if(primary_target)
  56                 return primary_target->get_buildable_target();
  57         if(!needs_rebuild())
  58                 return 0;
  59
  60         bool self_ok = state!=BUILDING;
  61         for(Target *d: depends)
  62         {
  63                 // Avoid infinite recursion if a target depends on its own side effect
  64                 if(any_equals(side_effects, d))
  65                         continue;
  66
  67                 Target *tgt = d->get_buildable_target();
  68                 if(tgt)
  69                         return tgt;
  70                 else if(d->needs_rebuild())
  71                         self_ok = false;
  72         }
  73
  74         if(self_ok)
  75                 return this;
  76
  77         return 0;
  78 }
  79
  80 void Target::set_tool(Tool &t)
  81 {
  82         tool = &t;
  83         for(Target *s: side_effects)
  84                 s->set_tool(t);
  85 }
  86
  87 void Target::collect_build_info(BuildInfo &binfo) const
  88 {
  89         if(tool)
  90                 binfo.update_from(tool->get_build_info());
  91         if(component)
  92                 binfo.update_from(component->get_build_info());
  93         else if(package)
  94                 binfo.update_from(package->get_build_info());
  95 }
  96
  97 void Target::force_rebuild()
  98 {
  99         if(!is_buildable())
 100                 throw logic_error("Target::force_rebuild");
 101         mark_rebuild("Forced rebuild");
 102 }
 103
 104 void Target::mark_rebuild(const string &reason)
 105 {
 106         if(reason.empty())
 107                 throw invalid_argument("No reason given for rebuilding "+name);
 108
 109         state = REBUILD;
 110         rebuild_reason = reason;
 111
 112         builder.get_logger().log("rebuild", "Rebuilding %s: %s", name, reason);
 113
 114         signal_bubble_rebuild.emit();
 115 }
 116
 117 void Target::prepare()
 118 {
 119         if(state>PREPARING)
 120                 return;
 121         if(state==PREPARING)
 122         {
 123                 builder.get_logger().log("problems", "Dependency cycle detected at %s", name);
 124                 problems.push_back("Dependency cycle detected");
 125                 state = BROKEN;
 126                 return;
 127         }
 128
 129         state = PREPARING;
 130         if(tool)
 131                 tool->prepare();
 132
 133         find_dependencies();
 134         bool broken = !problems.empty();
 135
 136         if(tool)
 137         {
 138                 if(FileTarget *tool_exe = tool->get_executable())
 139                         add_dependency(*tool_exe);
 140                 broken |= !tool->get_problems().empty();
 141
 142                 // Only check package and component problems for buildable targets
 143                 // XXX How to propagate nested package problems?
 144                 broken |= (package && !package->get_problems().empty());
 145                 broken |= (component && !component->get_problems().empty());
 146         }
 147
 148         for(Target *d: depends)
 149         {
 150                 d->prepare();
 151                 broken |= d->is_broken();
 152         }
 153         for(Target *d: trans_depends)
 154                 d->prepare();
 155
 156         check_rebuild();
 157         if(broken)
 158                 state = BROKEN;
 159         else if(state==PREPARING)
 160                 state = UPTODATE;
 161
 162         for(Target *d: depends)
 163                 d->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
 164 }
 165
 166 Task *Target::build()
 167 {
 168         if(primary_target)
 169                 return primary_target->build();
 170
 171         Task *task = tool->run(*this);
 172         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
 173         state = BUILDING;
 174
 175         build(*task);
 176         for(Target *s: side_effects)
 177                 s->build(*task);
 178
 179         return task;
 180 }
 181
 182 void Target::build_finished(bool success)
 183 {
 184         state = UPTODATE;
 185         if(success)
 186         {
 187                 modified();
 188                 for(Target *s: side_effects)
 189                         s->build_finished(success);
 190                 signal_modified.emit();
 191         }
 192 }