Rename module to init

1 files changed, 103 insertions, 0 deletions

diff --git a/build2/config/init.cxx b/build2/config/init.cxx
new file mode 100644
index 0000000..6c713df
--- /dev/null
+++ b/build2/config/init.cxx
@@ -0,0 +1,103 @@
+// file      : build2/config/init.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <build2/config/init>
+
+#include <build2/file>
+#include <build2/rule>
+#include <build2/scope>
+#include <build2/context>
+#include <build2/filesystem> // file_exists()
+#include <build2/diagnostics>
+
+#include <build2/config/module>
+#include <build2/config/utility>
+#include <build2/config/operation>
+
+using namespace std;
+using namespace butl;
+
+namespace build2
+{
+  namespace config
+  {
+    const string module::name ("config");
+
+    void
+    boot (scope& rs, const location&, unique_ptr<module_base>&)
+    {
+      tracer trace ("config::boot");
+
+      const dir_path& out_root (rs.out_path ());
+      l5 ([&]{trace << "for " << out_root;});
+
+      // Register meta-operations.
+      //
+      rs.meta_operations.insert (configure_id, configure);
+      rs.meta_operations.insert (disfigure_id, disfigure);
+
+      // Load config.build if one exists.
+      //
+      // Note that we have to do this during bootstrap since the order in
+      // which the modules will be initialized is unspecified. So it is
+      // possible that some module which needs the configuration will get
+      // called first.
+      //
+      path f (out_root / config_file);
+
+      if (file_exists (f))
+        source (f, rs, rs);
+    }
+
+    bool
+    init (scope& rs,
+          scope&,
+          const location& l,
+          unique_ptr<module_base>& mod,
+          bool first,
+          bool,
+          const variable_map& config_hints)
+    {
+      tracer trace ("config::init");
+
+      if (!first)
+      {
+        warn (l) << "multiple config module initializations";
+        return true;
+      }
+
+      l5 ([&]{trace << "for " << rs.out_path ();});
+
+      assert (config_hints.empty ()); // We don't known any hints.
+
+      // Only create the module if we are configuring.
+      //
+      if (current_mif->id == configure_id)
+        mod.reset (new module);
+
+      // Adjust priority for the import pseudo-module so that config.import.*
+      // values come first in config.build.
+      //
+      config::save_module (rs, "import", INT32_MIN);
+
+      // Register alias and fallback rule for the configure meta-operation.
+      //
+      {
+        // We need this rule for out-of-any-project dependencies (e.g.,
+        // libraries imported from /usr/lib).
+        //
+        global_scope->rules.insert<file> (
+          configure_id, 0, "config.file", file_rule::instance);
+
+        auto& r (rs.rules);
+
+        r.insert<target> (configure_id, 0, "config", fallback_rule::instance);
+        r.insert<file> (configure_id, 0, "config.file", fallback_rule::instance);
+        r.insert<alias> (configure_id, 0, "config.alias", alias_rule::instance);
+      }
+
+      return true;
+    }
+  }
+}