Split class Package into SourcePackage and BinaryPackage

[builder.git] / source / target.cpp

diff --git a/source/target.cpp b/source/target.cpp
index 481d2f4a68dd460a6f3c0a8222af58be349208c9..fa63ac4e5154293050db87c91168d4c286690938 100644 (file)
--- a/source/target.cpp
+++ b/source/target.cpp
@@ -1,47 +1,165 @@
+/* $Id$
+
+This file is part of builder
+Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include <msp/path/utils.h>
+#include <msp/time/utils.h>
+#include "action.h"
 #include "builder.h"
+#include "package.h"
+#include "sourcepackage.h"
 #include "target.h"
 
 using namespace std;
+using namespace Msp;
 
-Target *TargetRef::get_target()
-{
-       if(!target)
-               target=builder.get_target(name);
-       return target;
-}
-
+/**
+Tries to locate a target that will help getting this target built.  If all
+dependencies are up-to-date, returns this target.  If there are no targets
+ready to be built (maybe because they are being built right now), returns 0.
+*/
 Target *Target::get_buildable_target()
 {
-       if(rebuild && ready_for_build && !building)
-               return this;
+       if(!rebuild)
+               return 0;
 
-       for(list<Target *>::iterator i=depends.begin(); i!=depends.end(); ++i)
+       bool self_ok=!building;
+       for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
        {
                Target *tgt=(*i)->get_buildable_target();
                if(tgt)
                        return tgt;
+               else if((*i)->get_rebuild())
+                       self_ok=false;
        }
 
+       if(self_ok)
+               return this;
+
        return 0;
 }
 
 void Target::add_depend(Target *dep)
 {
+       if(dep==this)
+               throw InvalidParameterValue("A target can't depend on itself");
        depends.push_back(dep);
        dep->rdepends.push_back(this);
 }
 
+/**
+Prepares the target by recursively preparing dependencies, then checking
+whether rebuilding is needed.  A flag is used to prevent unnecessary
+executions.
+*/
+void Target::prepare()
+{
+       if(prepared)
+               return;
+
+       prepared=true;
+       for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
+               (*i)->prepare();
+
+       check_rebuild();
+
+}
+
+/**
+Returns the number of targets that need to be rebuilt in order to get this
+target up-to-date.
+*/
+unsigned Target::count_rebuild()
+{
+       if(counted)
+               return 0;
+
+       counted=true;
+       unsigned count=rebuild;
+       for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
+               count+=(*i)->count_rebuild();
+       return count;
+}
+
+/**
+Changes the mtime of the target to the current time.
+*/
+void Target::touch()
+{
+       mtime=Time::now();
+}
+
 Target::Target(Builder &b, const Package *p, const string &n):
        builder(b),
        package(p),
        name(n),
+       buildable(false),
        building(false),
        rebuild(false),
-       ready_for_build(false)
-{ }
+       deps_ready(false),
+       prepared(false),
+       counted(false)
+{
+       builder.add_target(this);
+
+       struct stat st;
+       if(!Path::stat(name, st))
+               mtime=Time::TimeStamp::from_unixtime(st.st_mtime);
+}
 
 void Target::mark_rebuild(const std::string &reason)
 {
        rebuild=true;
        rebuild_reason=reason;
 }
+
+/**
+Checks if this target needs to be rebuilt and why.
+*/
+void Target::check_rebuild()
+{
+       if(!buildable)
+               return;
+
+       if(builder.get_build_all())
+               mark_rebuild("Rebuilding everything");
+       else if(!mtime)
+               mark_rebuild("Does not exist");
+       else
+       {
+               for(TargetList::iterator i=depends.begin(); (i!=depends.end() && !rebuild); ++i)
+               {
+                       if((*i)->get_mtime()>mtime)
+                               mark_rebuild(Path::basename((*i)->get_name())+" has changed");
+                       else if((*i)->get_rebuild())
+                               mark_rebuild(Path::basename((*i)->get_name())+" needs rebuilding");
+               }
+       }
+
+       const SourcePackage *spkg=dynamic_cast<const SourcePackage *>(package);
+       if(!rebuild && spkg && spkg->get_config().get_mtime()>mtime)
+               mark_rebuild("Package options changed");
+}
+
+/**
+Hooks the target up with the given action, then returns it.  This should be
+called from the public build() function of buildable targets.
+*/
+Action *Target::build(Action *action)
+{
+       building=true;
+       action->signal_done.connect(sigc::mem_fun(this, &Target::build_done));
+       return action;
+}
+
+/**
+Handles for the build_done signal of Action.
+*/
+void Target::build_done()
+{
+       building=false;
+       rebuild=false;
+}