/* $Id$
This file is part of builder
-Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
+Copyright © 2006-2009 Mikko Rasa, Mikkosoft Productions
Distributed under the LGPL
*/
-#include <msp/path/utils.h>
-#include <msp/time/utils.h>
+#include <msp/fs/stat.h>
+#include <msp/fs/utils.h>
#include "action.h"
#include "builder.h"
+#include "filetarget.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(Builder &b, const Package *p, const string &n):
+ builder(b),
+ package(p),
+ name(n),
+ buildable(false),
+ building(false),
+ rebuild(false),
+ deps_ready(false),
+ preparing(false),
+ prepared(false)
+{ }
+
Target *Target::get_buildable_target()
{
if(!rebuild)
return 0;
- bool self_ok=!building;
+ bool self_ok = !building;
for(TargetList::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;
+ self_ok = false;
}
if(self_ok)
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;
+ if(preparing)
+ {
+ builder.problem((package ? package->get_name() : string()), "Dependency cycle detected at "+name);
+ return;
+ }
- prepared=true;
+ preparing = true;
for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
(*i)->prepare();
check_rebuild();
-
+ preparing = false;
+ prepared = true;
}
-/**
-Returns the number of targets that need to be rebuilt in order to get this
-target up-to-date.
-*/
-unsigned Target::count_rebuild()
+Action *Target::build()
{
- if(counted)
+ if(!buildable)
+ {
+ rebuild = false;
return 0;
+ }
- counted=true;
- unsigned count=rebuild;
- for(TargetList::iterator i=depends.begin(); i!=depends.end(); ++i)
- count+=(*i)->count_rebuild();
- return count;
-}
+ // XXX Minor breach of OO here
+ if(FileTarget *ft = dynamic_cast<FileTarget *>(this))
+ if(!builder.get_dry_run() && FS::exists(ft->get_path()))
+ FS::unlink(ft->get_path());
-/**
-Changes the mtime of the target to the current time.
-*/
-void Target::touch()
-{
- mtime=Time::now();
-}
+ Action *action = create_action();
+ if(action)
+ {
+ action->signal_done.connect(sigc::mem_fun(this, &Target::build_done));
-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),
- counted(false)
-{
- builder.add_target(this);
+ building = true;
+ }
- struct stat st;
- if(!Path::stat(name, st))
- mtime=Time::TimeStamp::from_unixtime(st.st_mtime);
+ return action;
}
void Target::mark_rebuild(const std::string &reason)
{
- rebuild=true;
- rebuild_reason=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");
- }
- }
- 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;
- 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;
+ building = false;
+ rebuild = false;
}