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::collect_build_info(BuildInfo &binfo) const
  89 {
  90         if(tool)
  91                 binfo.update_from(tool->get_build_info());
  92         if(component)
  93                 binfo.update_from(component->get_build_info());
  94         else if(package)
  95                 binfo.update_from(package->get_build_info());
  96 }
  97
  98 void Target::force_rebuild()
  99 {
 100         if(!is_buildable())
 101                 throw logic_error("Target::force_rebuild");
 102         mark_rebuild("Forced rebuild");
 103 }
 104
 105 void Target::mark_rebuild(const string &reason)
 106 {
 107         if(reason.empty())
 108                 throw invalid_argument("No reason given for rebuilding "+name);
 109
 110         state = REBUILD;
 111         rebuild_reason = reason;
 112
 113         builder.get_logger().log("rebuild", format("Rebuilding %s: %s", name, reason));
 114
 115         signal_bubble_rebuild.emit();
 116 }
 117
 118 void Target::prepare()
 119 {
 120         if(state>PREPARING)
 121                 return;
 122         if(state==PREPARING)
 123         {
 124                 builder.get_logger().log("problems", format("Dependency cycle detected at %s", name));
 125                 problems.push_back("Dependency cycle detected");
 126                 state = BROKEN;
 127                 return;
 128         }
 129
 130         state = PREPARING;
 131         if(tool)
 132                 tool->prepare();
 133
 134         find_dependencies();
 135         bool broken = !problems.empty();
 136
 137         if(tool)
 138         {
 139                 if(FileTarget *tool_exe = tool->get_executable())
 140                         add_dependency(*tool_exe);
 141                 broken |= !tool->get_problems().empty();
 142
 143                 // Only check package and component problems for buildable targets
 144                 // XXX How to propagate nested package problems?
 145                 broken |= (package && !package->get_problems().empty());
 146                 broken |= (component && !component->get_problems().empty());
 147         }
 148
 149         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
 150         {
 151                 (*i)->prepare();
 152                 broken |= (*i)->is_broken();
 153         }
 154         for(Dependencies::iterator i=trans_depends.begin(); i!=trans_depends.end(); ++i)
 155                 (*i)->prepare();
 156
 157         check_rebuild();
 158         if(broken)
 159                 state = BROKEN;
 160         else if(state==PREPARING)
 161                 state = UPTODATE;
 162
 163         for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
 164                 (*i)->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
 165 }
 166
 167 Task *Target::build()
 168 {
 169         if(primary_target)
 170                 return primary_target->build();
 171
 172         Task *task = tool->run(*this);
 173         task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
 174         state = BUILDING;
 175
 176         build(*task);
 177         for(Dependencies::const_iterator i=side_effects.begin(); i!=side_effects.end(); ++i)
 178                 (*i)->build(*task);
 179
 180         return task;
 181 }
 182
 183 void Target::build_finished(bool success)
 184 {
 185         state = UPTODATE;
 186         if(success)
 187         {
 188                 modified();
 189                 for(Dependencies::const_iterator i=side_effects.begin(); i!=side_effects.end(); ++i)
 190                         (*i)->build_finished(success);
 191                 signal_modified.emit();
 192         }
 193 }