+/* $Id$
+
+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 "target.h"
using namespace std;
using namespace Msp;
+/**
+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()
{
- bool self_ok=true;
- for(list<Target *>::iterator i=depends.begin(); i!=depends.end(); ++i)
+ if(!rebuild)
+ return 0;
+
+ bool self_ok=!building;
+ for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
{
Target *tgt=(*i)->get_buildable_target();
if(tgt)
self_ok=false;
}
- if(self_ok && rebuild && !building)
+ 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;
- for(list<Target *>::iterator i=depends.begin(); i!=depends.end(); ++i)
+ 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),
+ deps_ready(false),
prepared(false),
- buildable(false)
+ counted(false)
{
+ builder.add_target(this);
+
struct stat st;
if(!Path::stat(name, st))
- {
mtime=Time::TimeStamp::from_unixtime(st.st_mtime);
- vmtime=mtime;
- }
}
void Target::mark_rebuild(const std::string &reason)
rebuild_reason=reason;
}
+/**
+Checks if this target needs to be rebuilt and why.
+*/
void Target::check_rebuild()
{
if(!buildable)
return;
- if(!mtime)
+ if(builder.get_build_all())
+ mark_rebuild("Rebuilding everything");
+ else if(!mtime)
mark_rebuild("Does not exist");
else
{
- for(list<Target *>::iterator i=depends.begin(); (i!=depends.end() && !rebuild); ++i)
+ for(TargetList::iterator i=depends.begin(); (i!=depends.end() && !rebuild); ++i)
{
- if((*i)->get_virtual_mtime()>mtime)
- mark_rebuild((*i)->get_name()+" has changed");
+ if((*i)->get_mtime()>mtime)
+ mark_rebuild(Path::basename((*i)->get_name())+" has changed");
else if((*i)->get_rebuild())
- mark_rebuild((*i)->get_name()+" needs rebuilding");
+ mark_rebuild(Path::basename((*i)->get_name())+" needs rebuilding");
}
}
+ if(!rebuild && package && package->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;
return action;
}
+/**
+Handles for the build_done signal of Action.
+*/
void Target::build_done()
{
building=false;