#define TARGET_H_
#include <list>
+#include <map>
+#include <set>
#include <string>
#include <msp/time/timestamp.h>
class Builder;
+class Component;
class Package;
+class Task;
+class Tool;
+
class Target;
-class TargetRef
+/**
+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:
- TargetRef(Builder &b, const std::string &n): builder(b), name(n) { }
- Target *get_target();
-private:
+ typedef std::list<Target *> Dependencies;
+
+protected:
+ enum State
+ {
+ INIT,
+ PREPARING,
+ REBUILD,
+ BUILDING,
+ UPTODATE
+ };
+
Builder &builder;
+ const Package *package;
+ const Component *component;
std::string name;
- Target *target;
-};
-class Target
-{
+ const Tool *tool;
+ State state;
+ std::string rebuild_reason;
+ std::string install_location;
+
+ Dependencies depends;
+
+ Target(Builder &, const std::string &);
public:
+ virtual ~Target() { }
+
+ virtual const char *get_type() const = 0;
const std::string &get_name() const { return name; }
- Target *get_buildable_target();
- bool get_rebuild() const { return rebuild; }
+ 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; }
- virtual void find_depends()=0;
- void add_depend(Target *);
- virtual const char *get_type() const=0;
- virtual ~Target() { }
-protected:
- Builder &builder;
- const Package *package;
- std::string name;
- bool building;
- bool rebuild;
- std::string rebuild_reason;
- Msp::Time::TimeStamp mtime;
- std::list<Target *> depends;
- std::list<Target *> rdepends;
- bool ready_for_build;
+ 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() { }
+
+ /**
+ Prepares the target by recursively preparing dependencies, then checking
+ whether rebuilding is needed. A flag is used to prevent unnecessary
+ executions.
+ */
+ virtual void prepare();
- Target(Builder &, const Package *, const std::string &);
+ /**
+ Starts building the target. Returns the Action used for building.
+ */
+ Task *build();
+protected:
void mark_rebuild(const std::string &);
+
+ /**
+ 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