diff options
Diffstat (limited to 'libbuild2/context.hxx')
| -rw-r--r-- | libbuild2/context.hxx | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/libbuild2/context.hxx b/libbuild2/context.hxx index 35ba11d..5c426ad 100644 --- a/libbuild2/context.hxx +++ b/libbuild2/context.hxx @@ -667,6 +667,11 @@ namespace build2 // properly setup context (including, normally, a self-reference in // modules_context). // + // The var_override_function callback can be used to parse ad hoc project- + // wide variable overrides (see parse_variable_override()). This has to + // happen at a specific point during context construction (see the + // implementation for details). + // // Note: see also the trace_* data members that, if needed, must be set // separately, after construction. // @@ -679,6 +684,8 @@ namespace build2 reserves (size_t t, size_t v): targets (t), variables (v) {} }; + using var_override_function = void (context&, size_t&); + context (scheduler&, global_mutexes&, file_cache&, @@ -690,7 +697,8 @@ namespace build2 const strings& cmd_vars = {}, reserves = {0, 160}, optional<context*> module_context = nullptr, - const loaded_modules_lock* inherited_mudules_lock = nullptr); + const loaded_modules_lock* inherited_mudules_lock = nullptr, + const function<var_override_function>& = nullptr); // Special context with bare minimum of initializations. It is only // guaranteed to be sufficiently initialized to call extract_variable(). @@ -707,12 +715,28 @@ namespace build2 void reserve (reserves); + // Parse a variable override returning its type in the first half of the + // pair. Index is the variable index (used to derive unique name) and if + // buildspec is true then assume `--` is used as a separator between + // variables and buildscpec and issue appropriate diagnostics. + // + // Note: should only be called from the var_override_function constructor + // callback. + // + pair<char, variable_override> + parse_variable_override (const string& var, size_t index, bool buildspec); + // Enter project-wide (as opposed to global) variable overrides. // + // If the amalgamation scope is specified, then use it instead of + // rs.weak_scope() to set overrides with global visibility (make sure you + // understand the implications before doing this). + // void enter_project_overrides (scope& rs, const dir_path& out_base, - const variable_overrides&); + const variable_overrides&, + scope* amalgamation = nullptr); // Set current meta-operation and operation. // |