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// file : build/operation.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <build/operation>
#include <ostream>
#include <cassert>
#include <functional> // reference_wrapper
#include <build/scope>
#include <build/target>
#include <build/file>
#include <build/algorithm>
#include <build/diagnostics>
#include <build/dump>
using namespace std;
namespace build
{
// action
//
ostream&
operator<< (ostream& os, action a)
{
return os << '('
<< static_cast<uint16_t> (a.meta_operation ()) << ','
<< static_cast<uint16_t> (a.operation ())
<< ')';
}
// perform
//
void
load (const path& bf,
scope& root,
const path& out_base,
const path& src_base,
const location&)
{
// Load project's root[-pre].build.
//
root_pre (root);
// Create the base scope. Note that its existence doesn't
// mean it was already processed as a base scope; it can
// be the same as root.
//
scope& base (scopes[out_base]);
base.variables["out_base"] = out_base;
auto v (base.variables["src_base"] = src_base);
base.src_path_ = &v.as<const path&> ();
// Load the buildfile unless it has already been loaded.
//
source_once (bf, root, base, root);
}
void
match (action a,
const target_key& tk,
const location& l,
action_targets& ts)
{
tracer trace ("match");
auto i (targets.find (tk, trace));
if (i == targets.end ())
fail (l) << "unknown target " << tk;
target& t (**i);
//@@ dump
level4 ([&]{trace << "matching " << t;});
match (a, t);
//@@ dump
ts.push_back (&t);
}
void
execute (action a, const action_targets& ts)
{
tracer trace ("execute");
// Build collecting postponed targets (to be re-examined later).
//
vector<reference_wrapper<target>> psp;
for (void* v: ts)
{
target& t (*static_cast<target*> (v));
level4 ([&]{trace << "executing target " << t;});
switch (execute (a, t))
{
case target_state::postponed:
{
info << "target " << t << " is postponed";
psp.push_back (t);
break;
}
case target_state::unchanged:
{
info << "target " << t << " is unchanged";
break;
}
case target_state::changed:
break;
case target_state::failed:
//@@ This could probably happen in a parallel build.
default:
assert (false);
}
}
// Re-examine postponed targets.
//
for (target& t: psp)
{
switch (t.state)
{
case target_state::postponed:
{
info << "unable to execute target " << t << " at this time";
break;
}
case target_state::unchanged:
{
info << "target " << t << " is unchanged";
break;
}
case target_state::unknown: // Assume something was done to it.
case target_state::changed:
break;
case target_state::failed:
//@@ This could probably happen in a parallel build.
default:
assert (false);
}
}
}
meta_operation_info perform {
"perform",
nullptr, // meta-operation pre
nullptr, // operation pre
&load,
&match,
&execute,
nullptr, // operation post
nullptr // meta-operation post
};
// operations
//
operation_info default_ {"<default>", execution_mode::first};
operation_info update {"update", execution_mode::first};
operation_info clean {"clean", execution_mode::last};
}
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