X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftarget.h;h=edfd60cebe7f8f655a5c8011512d05b80b481d9b;hb=05a2b9dabd01414e9e9a91f9d69babaca4ccb32d;hp=605b328badef68faaca64c0c6f2b84c61f9de98d;hpb=7aeaa4ba965f596edad438c02e345a8843f7469a;p=builder.git

diff --git a/source/target.h b/source/target.h
index 605b328..edfd60c 100644
--- a/source/target.h
+++ b/source/target.h
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of builder
-Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
+Copyright © 2006-2010  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -9,6 +9,8 @@ Distributed under the LGPL
 #define TARGET_H_
 
 #include <list>
+#include <map>
+#include <set>
 #include <string>
 #include <msp/time/timestamp.h>
 
@@ -21,57 +23,92 @@ 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.  Most targets are associated with a file.
+handles many common tasks.  See also FileTarget and VirtualTarget.
 */
 class Target
 {
+protected:
+	Builder &builder;
+	const Package *package;
+	std::string name;
+
+	bool buildable;
+	bool building;
+	bool rebuild;
+	std::string rebuild_reason;
+
+	TargetList depends;
+	bool deps_ready;
+
+	bool preparing;
+	bool prepared;
+
+	Target(Builder &, const Package *, const std::string &);
 public:
-	const std::string  &get_name() const           { return name; }
-	Target             *get_buildable_target();
-	bool               get_buildable() const       { return buildable; }
-	bool               get_rebuild() const         { return rebuild; }
-	const std::string  &get_rebuild_reason() const { return rebuild_reason; }
-	const Msp::Time::TimeStamp &get_mtime() const  { return mtime; }
-	virtual const char *get_type() const=0;
-	const TargetList   &get_depends() const        { return depends; }
-	const Package      *get_package() const        { return package; }
-	bool               get_depends_ready() const   { return deps_ready; }
-	void               add_depend(Target *);
-	virtual void       find_depends()              { deps_ready=true; }
-	virtual void       prepare();
+	virtual ~Target() { }
+
+	virtual const char *get_type() const = 0;
+	const std::string &get_name() const { return name; }
+	const Package *get_package() const { return package; }
 
 	/**
-	Creates and returns an Action suitable for building this 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.
 	*/
-	virtual Action     *build()=0;
+	Target *get_buildable_target();
 
-	void               reset_count()               { counted=false; }
-	virtual unsigned   count_rebuild();
-	void               touch();
-	virtual ~Target() { }
-protected:
-	Builder       &builder;
-	const Package *package;
-	std::string   name;
-	Msp::Time::TimeStamp mtime;
+	/**
+	If this target is a proxy for another (such as Install or Symlink), return
+	that target.  Otherwise, return the target itself.
 
-	bool          buildable;
-	bool          building;
-	bool          rebuild;
-	std::string   rebuild_reason;
+	Implementors should call the function recursively to find the final target.
+	*/
+	virtual Target *get_real_target() { return this; }
 
-	TargetList    depends;
-	TargetList    rdepends;
-	bool          deps_ready;
+	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; }
 
-	bool          prepared;
-	bool          counted;
+	/**
+	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; }
 
-	Target(Builder &, const Package *, const std::string &);
-	void         mark_rebuild(const std::string &);
-	virtual void check_rebuild();
-	Action       *build(Action *);
+	/**
+	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