X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftarget.h;h=d0e68f50588da69decb51b556dd633be63529c05;hb=632361796a7ddadf8a726526c937fab22281fb7b;hp=890f123e2095855036e11655df664fec767ef293;hpb=9976a7bdf0e53966dce4bc828a37eb42de0223e3;p=builder.git

diff --git a/source/target.h b/source/target.h
index 890f123..d0e68f5 100644
--- a/source/target.h
+++ b/source/target.h
@@ -2,53 +2,116 @@
 #define TARGET_H_
 
 #include <list>
+#include <map>
+#include <set>
 #include <string>
 #include <msp/time/timestamp.h>
 
-class Action;
 class Builder;
+class Component;
 class Package;
+class Task;
+class Tool;
 
+class Target;
+
+/**
+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; }
-	const Msp::Time::TimeStamp &get_mtime() const  { return mtime; }
-	virtual const char *get_type() const=0;
-	const std::list<Target *> &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 Action    *build()=0;
-	void              reset_count()                { counted=false; }
-	virtual unsigned  count_rebuild();
-	void              touch();
-	virtual ~Target() { }
+	typedef std::list<Target *> Dependencies;
+
 protected:
-	Builder     &builder;
+	enum State
+	{
+		INIT,
+		PREPARING,
+		REBUILD,
+		BUILDING,
+		UPTODATE
+	};
+
+	Builder &builder;
 	const Package *package;
+	const Component *component;
 	std::string name;
-	bool        building;
-	bool        rebuild;
+
+	const Tool *tool;
+	State state;
 	std::string rebuild_reason;
-	Msp::Time::TimeStamp mtime;
-	std::list<Target *> depends;
-	std::list<Target *> rdepends;
-	bool        deps_ready;
-	bool        prepared;
-	bool        buildable;
-	bool        counted;
-
-	Target(Builder &, const Package *, const std::string &);
+	std::string install_location;
+
+	Dependencies depends;
+	bool deps_ready;
+
+	Target(Builder &, 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; }
+	const Component *get_component() const { return component; }
+
+	/**
+	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; }
+
+	void set_tool(const Tool &);
+	const Tool *get_tool() const { return tool; }
+
+	bool is_buildable() const { return tool!=0; }
+	bool needs_rebuild() const { return state>PREPARING && state<UPTODATE; }
+	const std::string &get_rebuild_reason() const { return rebuild_reason; }
+	bool is_installable() const { return !install_location.empty(); }
+	const std::string &get_install_location() const { return install_location; }
+	void add_depend(Target *);
+	const Dependencies &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.
+	*/
+	Task *build();
+protected:
 	void mark_rebuild(const std::string &);
-	virtual void check_rebuild();
-	Action *build(Action *);
-	virtual void build_done();
+
+	/**
+	Checks if the target needs to be rebuilt and why.
+	*/
+	virtual void check_rebuild() = 0;
+
+	/**
+	Handler for the build_finished signal of Task.
+	*/
+	virtual void build_finished(bool);
 };
 
 #endif