class Builder;
class Component;
-class Package;
+class SourcePackage;
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.
protected:
Builder &builder;
- const Package *package;
+ const SourcePackage *package;
const Component *component;
std::string name;
const Tool *tool;
State state;
std::string rebuild_reason;
- std::string install_location;
Dependencies depends;
virtual const char *get_type() const = 0;
const std::string &get_name() const { return name; }
- const Package *get_package() const { return package; }
+ const SourcePackage *get_package() const { return package; }
const Component *get_component() const { return component; }
+ /** Adds a dependency for the target. Order is preseved and is important
+ for some target types. It is an error to create dependency cycles, although
+ this won't be detected until the targets are prepared. */
+ void add_dependency(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; }
+
/** 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), return that
- target. Otherwise, return the target itself.
-
- Implementors should call the function recursively to find the final 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. */
virtual Target *get_real_target() { return this; }
void set_tool(const Tool &);
+
+ /** Returns the tool used to build the target. To actually build it, call
+ the build() function. */
const Tool *get_tool() const { return tool; }
/** Indicates if it's possible to build this target. */
the target has been prepared. */
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; }
-
- /** Finds dependencies for the target. */
- virtual void find_depends() { }
+ /** Forces rebuild of the target. */
+ void force_rebuild();
- /** Prepares the target by finding dependencies, recursively preparing them
- and then checking whether rebuilding is needed. */
- virtual void prepare();
-
- /** Starts building the target. Returns the Action used for building. */
- Task *build();
protected:
+ /** Marks the target to be rebuilt and specified a reason for it. */
void mark_rebuild(const std::string &);
/** Checks if the target needs to be rebuilt and why. */
virtual void check_rebuild() = 0;
+public:
+ /** Prepares the target by finding dependencies, recursively preparing them
+ and then checking whether rebuilding is needed. */
+ void prepare();
+
+ /** Invokes the associated Tool to build the target and returns the
+ resulting Task. The task must be started by the caller. */
+ virtual Task *build();
+
+protected:
/** Handler for Task::signal_finished. */
virtual void build_finished(bool);
};