diff options
| author | Boris Kolpackov <boris@codesynthesis.com> | 2017-11-30 14:48:19 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2017-11-30 14:48:19 +0200 |
| commit | 879b5f52cb86f24352f4ed245fcce5f1ab885f97 (patch) | |
| tree | ff483ce4aa64dda7d17b82f956333f0705257568 /build2/scope.hxx | |
| parent | 074a8c04a384a9752466bd2af69b695333b2955c (diff) | |
Implement support for scope operation callbacks
An entity (module, core) can register a function that will be called when an
action is executed on the dir{} target that corresponds to the scope. The pre
callback is called just before the recipe and the post -- immediately after.
Diffstat (limited to 'build2/scope.hxx')
| -rw-r--r-- | build2/scope.hxx | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/build2/scope.hxx b/build2/scope.hxx index ad1b295..00aba52 100644 --- a/build2/scope.hxx +++ b/build2/scope.hxx @@ -5,8 +5,8 @@ #ifndef BUILD2_SCOPE_HXX #define BUILD2_SCOPE_HXX +#include <map> #include <unordered_set> -#include <unordered_map> #include <libbutl/path-map.mxx> @@ -17,11 +17,14 @@ #include <build2/variable.hxx> #include <build2/target-key.hxx> #include <build2/target-type.hxx> +#include <build2/target-state.hxx> #include <build2/rule-map.hxx> #include <build2/operation.hxx> namespace build2 { + class dir; + class scope { public: @@ -240,6 +243,34 @@ namespace build2 public: rule_map rules; + // Operation callbacks. + // + // An entity (module, core) can register a function that will be called + // when an action is executed on the dir{} target that corresponds to this + // scope. The pre callback is called just before the recipe and the post + // -- immediately after. The callbacks are only called if the recipe + // (including noop recipe) is executed for the corresponding target. The + // callbacks should only be registered during the load phase. + // + // It only makes sense for callbacks to return target_state changed or + // unchanged and to throw failed in case of an error. These pre/post + // states will be merged with the recipe state and become the target + // state. See execute_recipe() for details. + // + public: + struct operation_callback + { + using callback = target_state (action, const scope&, const dir&); + + function<callback> pre; + function<callback> post; + }; + + using operation_callback_map = std::multimap<action_id, + operation_callback>; + + operation_callback_map operation_callbacks; + // Modules. // public: |