More generic system for installing targets under different names

[builder.git] / source / target.cpp

diff --git a/source/target.cpp b/source/target.cpp
index b3dc50904717450c938f65f47add7b490073a317..64e1115adbd7bdc43134c3ef185764f944a40848 100644 (file)
--- a/source/target.cpp
+++ b/source/target.cpp
@@ -1,100 +1,130 @@
-#include <msp/path/utils.h>
-#include "action.h"
+#include <msp/fs/stat.h>
+#include <msp/fs/utils.h>
+#include <msp/strings/format.h>
 #include "builder.h"
-#include "package.h"
+#include "filetarget.h"
+#include "sourcepackage.h"
 #include "target.h"
+#include "task.h"
+#include "tool.h"
 
 using namespace std;
 using namespace Msp;
 
+Target::Target(Builder &b, const string &n):
+       builder(b),
+       package(0),
+       component(0),
+       name(n),
+       tool(0),
+       state(INIT)
+{
+       builder.add_target(this);
+}
+
+void Target::add_dependency(Target &dep)
+{
+       if(&dep==this)
+               throw invalid_argument("Target::add_depend");
+       depends.push_back(&dep);
+       if(state>PREPARING)
+               dep.signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
+}
+
 Target *Target::get_buildable_target()
 {
-       bool self_ok=true;
-       for(list<Target *>::iterator i=depends.begin(); i!=depends.end(); ++i)
+       if(!needs_rebuild())
+               return 0;
+
+       bool self_ok = state!=BUILDING;
+       for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
        {
-               Target *tgt=(*i)->get_buildable_target();
+               Target *tgt = (*i)->get_buildable_target();
                if(tgt)
                        return tgt;
-               else if((*i)->get_rebuild())
-                       self_ok=false;
+               else if((*i)->needs_rebuild())
+                       self_ok = false;
        }
 
-       if(self_ok && rebuild && !building)
+       if(self_ok)
                return this;
 
        return 0;
 }
 
-void Target::add_depend(Target *dep)
+void Target::set_tool(const Tool &t)
 {
-       depends.push_back(dep);
-       dep->rdepends.push_back(this);
+       tool = &t;
 }
 
-void Target::prepare()
+void Target::force_rebuild()
 {
-       if(prepared)
-               return;
-
-       for(list<Target *>::iterator i=depends.begin(); i!=depends.end(); ++i)
-               (*i)->prepare();
-
-       check_rebuild();
+       if(!is_buildable())
+               throw logic_error("Target::force_rebuild");
+       mark_rebuild("Forced rebuild");
 }
 
-Target::Target(Builder &b, const Package *p, const string &n):
-       builder(b),
-       package(p),
-       name(n),
-       building(false),
-       rebuild(false),
-       prepared(false),
-       buildable(false)
+void Target::mark_rebuild(const string &reason)
 {
-       struct stat st;
-       if(!Path::stat(name, st))
-       {
-               mtime=Time::TimeStamp::from_unixtime(st.st_mtime);
-               vmtime=mtime;
-       }
-}
+       if(reason.empty())
+               throw invalid_argument("No reason given for rebuilding "+name);
 
-void Target::mark_rebuild(const std::string &reason)
-{
-       rebuild=true;
-       rebuild_reason=reason;
+       state = REBUILD;
+       rebuild_reason = reason;
+
+       builder.get_logger().log("rebuild", format("Rebuilding %s: %s", name, reason));
+
+       signal_bubble_rebuild.emit();
 }
 
-void Target::check_rebuild()
+void Target::prepare()
 {
-       if(!buildable)
+       if(state>PREPARING)
+               return;
+       if(state==PREPARING)
+       {
+               builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
                return;
+       }
 
-       if(!mtime)
-               mark_rebuild("Does not exist");
-       else
+       state = PREPARING;
+       find_dependencies();
+       if(tool)
        {
-               for(list<Target *>::iterator i=depends.begin(); (i!=depends.end() && !rebuild); ++i)
-               {
-                       if((*i)->get_virtual_mtime()>mtime)
-                               mark_rebuild((*i)->get_name()+" has changed");
-                       else if((*i)->get_rebuild())
-                               mark_rebuild((*i)->get_name()+" needs rebuilding");
-               }
+               if(FileTarget *tool_exe = tool->get_executable())
+                       add_dependency(*tool_exe);
        }
-       if(!rebuild && package && package->get_config().get_mtime()>mtime)
-               mark_rebuild("Package options changed");
+
+       for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
+               (*i)->prepare();
+
+       check_rebuild();
+       if(state==PREPARING)
+               state = UPTODATE;
+
+       for(Dependencies::iterator i=depends.begin(); i!=depends.end(); ++i)
+               (*i)->signal_bubble_rebuild.connect(sigc::mem_fun(this, &Target::check_rebuild));
 }
 
-Action *Target::build(Action *action)
+Task *Target::build()
 {
-       building=true;
-       action->signal_done.connect(sigc::mem_fun(this, &Target::build_done));
-       return action;
+       if(!tool)
+       {
+               // This special case is needed for VirtualTargets
+               state = UPTODATE;
+               return 0;
+       }
+
+       Task *task = tool->run(*this);
+       task->signal_finished.connect(sigc::mem_fun(this, &Target::build_finished));
+       state = BUILDING;
+
+       return task;
 }
 
-void Target::build_done()
+void Target::build_finished(bool success)
 {
-       building=false;
-       rebuild=false;
+       state = UPTODATE;
+       if(success)
+               modified();
 }