8 #include <msp/time/timestamp.h>
19 Targets make up the build graph. This class is a base for all target types and
20 handles many common tasks. See also FileTarget and VirtualTarget.
25 typedef std::list<Target *> Dependencies;
38 const Package *package;
39 const Component *component;
44 std::string rebuild_reason;
45 std::string install_location;
50 Target(Builder &, const std::string &);
54 virtual const char *get_type() const = 0;
55 const std::string &get_name() const { return name; }
56 const Package *get_package() const { return package; }
57 const Component *get_component() const { return component; }
60 Tries to locate a target that will help getting this target built. If all
61 dependencies are up-to-date, returns this target. If there are no targets
62 ready to be built (maybe because they are being built right now), returns 0.
64 virtual Target *get_buildable_target();
67 If this target is a proxy for another (such as Install or Symlink), return
68 that target. Otherwise, return the target itself.
70 Implementors should call the function recursively to find the final target.
72 virtual Target *get_real_target() { return this; }
74 void set_tool(const Tool &);
75 const Tool *get_tool() const { return tool; }
77 bool is_buildable() const { return tool!=0; }
78 bool needs_rebuild() const { return state>PREPARING && state<UPTODATE; }
79 const std::string &get_rebuild_reason() const { return rebuild_reason; }
80 bool is_installable() const { return !install_location.empty(); }
81 const std::string &get_install_location() const { return install_location; }
82 void add_depend(Target *);
83 const Dependencies &get_depends() const { return depends; }
84 bool get_depends_ready() const { return deps_ready; }
87 Finds dependencies for the target. When all dependencies have been found,
88 the function should set deps_ready to true.
90 virtual void find_depends() { deps_ready = true; }
93 Prepares the target by recursively preparing dependencies, then checking
94 whether rebuilding is needed. A flag is used to prevent unnecessary
97 virtual void prepare();
100 Starts building the target. Returns the Action used for building.
104 void mark_rebuild(const std::string &);
107 Checks if the target needs to be rebuilt and why.
109 virtual void check_rebuild() = 0;
112 Handler for the build_finished signal of Task.
114 virtual void build_finished(bool);