X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftarget.h;h=2881d42fcda00dc2409d57518eddaa48a357181b;hb=87ea54db19306434bac3e765c9bd3464fd53f390;hp=21135b03970aa96a7b0641e096b4cba6b513860a;hpb=4dc31cca056ea293d320928f61fef0558089d32d;p=builder.git

diff --git a/source/target.h b/source/target.h
index 21135b0..2881d42 100644
--- a/source/target.h
+++ b/source/target.h
@@ -1,50 +1,114 @@
+/* $Id$
+
+This file is part of builder
+Copyright © 2006-2010  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
 #ifndef TARGET_H_
 #define TARGET_H_
 
 #include <list>
+#include <map>
+#include <set>
 #include <string>
 #include <msp/time/timestamp.h>
 
+class Action;
 class Builder;
 class Package;
-class Target;
 
-class TargetRef
-{
-public:
-	TargetRef(Builder &b, const std::string &n): builder(b), name(n) { }
-	Target *get_target();
-private:
-	Builder &builder;
-	std::string name;
-	Target *target;
-};
+class Target;
+typedef std::list<Target *> TargetList;
 
+/**
+Targets make up the build graph.  This class is a base for all target types and
+handles many common tasks.  See also FileTarget and VirtualTarget.
+*/
 class Target
 {
-public:
-	const std::string &get_name() const { return name; }
-	Target *get_buildable_target();
-	bool   get_rebuild() const { return rebuild; }
-	const std::string &get_rebuild_reason() const { return rebuild_reason; }
-	virtual void find_depends()=0;
-	void   add_depend(Target *);
-	virtual const char *get_type() const=0;
-	virtual ~Target() { }
 protected:
-	Builder     &builder;
+	Builder &builder;
 	const Package *package;
 	std::string name;
-	bool        building;
-	bool        rebuild;
+
+	bool buildable;
+	bool building;
+	bool rebuild;
 	std::string rebuild_reason;
-	Msp::Time::TimeStamp mtime;
-	std::list<Target *> depends;
-	std::list<Target *> rdepends;
-	bool        ready_for_build;
+
+	TargetList depends;
+	bool deps_ready;
+
+	bool preparing;
+	bool prepared;
 
 	Target(Builder &, const Package *, const std::string &);
+public:
+	virtual ~Target() { }
+
+	virtual const char *get_type() const = 0;
+	const std::string &get_name() const { return name; }
+	const Package *get_package() const { return package; }
+
+	/**
+	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.
+	*/
+	virtual Target *get_buildable_target();
+
+	/**
+	If this target is a proxy for another (such as Install or Symlink), return
+	that target.  Otherwise, return the target itself.
+
+	Implementors should call the function recursively to find the final target.
+	*/
+	virtual Target *get_real_target() { return this; }
+
+	bool is_buildable() const { return buildable; }
+	bool get_rebuild() const { return rebuild; }
+	const std::string &get_rebuild_reason() const { return rebuild_reason; }
+	void add_depend(Target *);
+	const TargetList &get_depends() const { return depends; }
+	bool get_depends_ready() const { return deps_ready; }
+
+	/**
+	Finds dependencies for the target.  When all dependencies have been found,
+	the function should set deps_ready to true.
+	*/
+	virtual void find_depends() { deps_ready = true; }
+
+	/**
+	Prepares the target by recursively preparing dependencies, then checking
+	whether rebuilding is needed.  A flag is used to prevent unnecessary
+	executions.
+	*/
+	virtual void prepare();
+
+	/**
+	Starts building the target.  Returns the Action used for building.
+	*/
+	Action *build();
+protected:
 	void mark_rebuild(const std::string &);
+
+	/**
+	Checks if the target needs to be rebuilt and why.
+	*/
+	virtual void check_rebuild() = 0;
+
+	/**
+	Creates and returns an Action suitable for building this target.
+	*/
+	virtual Action *create_action() =0;
+
+	/**
+	Handler for the build_done signal of Action.
+	*/
+	virtual void build_done();
 };
 
+typedef std::map<std::string, Target *> TargetMap;
+
 #endif