+ /** 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 &);
+
+protected:
+ /** Finds dependencies for the target. Called during preparation. If the
+ target needs to recursively inspect its dependencies, it should prepare its
+ direct dependencies first. */
+ virtual void find_dependencies() { }
+
+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; }
+
+ /// Returns the primary target associated with a side effect target.
+ Target *get_primary_target() const { return primary_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 Target *get_buildable_target();
+
+ /** If this target is a proxy for another (such as InstalledFile), return
+ that target. Otherwise, return the target itself. Implementors should call
+ the function recursively to find the final target. */