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// file : build2/config/module.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build2/config/module>
#include <build2/file>
#include <build2/rule>
#include <build2/scope>
#include <build2/context>
#include <build2/filesystem> // file_exists()
#include <build2/diagnostics>
#include <build2/config/operation>
using namespace std;
using namespace butl;
namespace build2
{
namespace config
{
const string module::name ("config");
//@@ Same as in operation.cxx
//
static const path config_file ("build/config.build");
void
boot (scope& root, const location&, unique_ptr<module_base>&)
{
tracer trace ("config::boot");
const dir_path& out_root (root.out_path ());
l5 ([&]{trace << "for " << out_root;});
// Register meta-operations.
//
root.meta_operations.insert (configure_id, configure);
root.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, root, root);
}
bool
init (scope& root,
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 " << root.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);
// 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 (root.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;
}
}
}
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