#define TARGET_H_
#include <list>
+#include <map>
+#include <set>
#include <string>
#include <msp/time/timestamp.h>
-class Action;
class Builder;
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; }
- void add_depend(Target *);
- virtual void find_depends()=0;
- virtual void prepare();
- virtual Action *build()=0;
- void reset_count() { counted=false; }
- 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;
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 prepared;
- bool buildable;
- bool counted;
+ std::string install_location;
+
+ Dependencies depends;
+ bool deps_ready;
Target(Builder &, const Package *, 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; }
+
+ /**
+ 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