X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftarget.h;h=114a51ec35ae934faf1ed89acdf9b99a749c9382;hb=0480f9ab0bcbe630f4a62c9b7ef7981443f9973f;hp=7c1d9a74b7ea90bc2ec881254da2cda61861f39b;hpb=0d95fee118a3fcd78f153dca5721d9fe19b6f6bf;p=builder.git

diff --git a/source/target.h b/source/target.h
index 7c1d9a7..114a51e 100644
--- a/source/target.h
+++ b/source/target.h
@@ -17,6 +17,11 @@ class Tool;
 /**
 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.
+
+Targets can depend on other targets.  There are two kinds of dependencies:
+normal and transitive.  Normal dependencies will need to be built before the
+target itself, and will cause the target to be rebuilt if modified.  Transitive
+dependencies can be used by other targets further down the chain.
 */
 class Target
 {
@@ -36,6 +41,7 @@ protected:
 
 public:
 	sigc::signal<void> signal_bubble_rebuild;
+	sigc::signal<void> signal_modified;
 
 protected:
 	Builder &builder;
@@ -49,6 +55,7 @@ protected:
 	std::list<std::string> problems;
 
 	Dependencies depends;
+	Dependencies trans_depends;
 	Dependencies side_effects;
 	Target *primary_target;
 
@@ -66,6 +73,8 @@ public:
 	this won't be detected until the targets are prepared. */
 	void add_dependency(Target &);
 
+	void add_transitive_dependency(Target &);
+
 	/** Adds a side effect for the target.  Side effects are not built on their
 	own, but together with their primary target. */
 	void add_side_effect(Target &);
@@ -80,6 +89,8 @@ public:
 	/// Returns the dependencies of the target, in the order they were added.
 	const Dependencies &get_dependencies() const { return depends; }
 
+	const Dependencies &get_transitive_dependencies() const { return trans_depends; }
+
 	/// Returns the side effects of the target.
 	const Dependencies &get_side_effects() const { return side_effects; }
 
@@ -138,6 +149,10 @@ public:
 	virtual Task *build();
 
 protected:
+	/** Targets can override this to do additional setup on the Task.  This is
+	also called on side effects, which normally do not get built by themselves. */
+	virtual void build(Task &) { }
+
 	/** Handler for Task::signal_finished. */
 	virtual void build_finished(bool);