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// file : build/operation.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build/operation>
#include <vector>
#include <ostream>
#include <cassert>
#include <functional> // reference_wrapper
#include <butl/utility> // reverse_iterate
#include <build/scope>
#include <build/target>
#include <build/file>
#include <build/algorithm>
#include <build/diagnostics>
#include <build/dump>
using namespace std;
using namespace butl;
namespace build
{
// action
//
ostream&
operator<< (ostream& os, action a)
{
uint16_t
m (a.meta_operation ()),
i (a.operation ()),
o (a.outer_operation ());
os << '(' << m << ',';
if (o != 0)
os << o << '(';
os << i;
if (o != 0)
os << ')';
os << ')';
return os;
}
// perform
//
void
load (const path& bf,
scope& root,
const dir_path& out_base,
const dir_path& src_base,
const location&)
{
// Load project's root[-pre].build.
//
load_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.assign ("out_base") = out_base;
base.src_path_ = &as<dir_path> (base.assign ("src_base") = src_base);
// Load the buildfile unless it has already been loaded.
//
source_once (bf, root, base, root);
}
void
search (scope&,
const target_key& tk,
const location& l,
action_targets& ts)
{
tracer trace ("search");
auto i (targets.find (tk, trace));
if (i == targets.end ())
fail (l) << "unknown target " << tk;
ts.push_back (i->get ());
}
void
match (action a, action_targets& ts)
{
tracer trace ("match");
if (verb >= 5)
dump (a);
for (void* vt: ts)
{
target& t (*static_cast<target*> (vt));
level4 ([&]{trace << "matching " << t;});
match (a, t);
}
if (verb >= 5)
dump (a);
}
void
execute (action a, const action_targets& ts, bool quiet)
{
tracer trace ("execute");
// Execute collecting postponed targets (to be re-examined later).
// Do it in reverse order if the execution mode is 'last'.
//
vector<reference_wrapper<target>> psp;
auto body (
[a, quiet, &psp, &trace] (void* v)
{
target& t (*static_cast<target*> (v));
level4 ([&]{trace << diag_doing (a, t);});
switch (execute (a, t))
{
case target_state::unchanged:
{
if (!quiet)
info << diag_done (a, t);
break;
}
case target_state::postponed:
psp.push_back (t);
break;
case target_state::changed:
break;
case target_state::failed:
//@@ This could probably happen in a parallel build.
default:
assert (false);
}
});
if (current_mode == execution_mode::first)
for (void* v: ts) body (v);
else
for (void* v: reverse_iterate (ts)) body (v);
// We should have executed every target that we matched.
//
assert (dependency_count == 0);
// Re-examine postponed targets. This is the only reliable way to
// find out whether the target has changed.
//
for (target& t: psp)
{
switch (execute (a, t))
{
case target_state::unchanged:
{
if (!quiet)
info << diag_done (a, t);
break;
}
case target_state::changed:
break;
case target_state::postponed:
assert (false);
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,
&search,
&match,
&execute,
nullptr, // operation post
nullptr // meta-operation post
};
// operations
//
operation_info default_ {
"<default>",
"",
"",
"",
execution_mode::first,
nullptr,
nullptr
};
operation_info update {
"update",
"update",
"updating",
"is up to date",
execution_mode::first,
nullptr,
nullptr
};
operation_info clean {
"clean",
"clean",
"cleaning",
"is clean",
execution_mode::last,
nullptr,
nullptr
};
// Tables.
//
string_table<meta_operation_id> meta_operation_table;
string_table<operation_id> operation_table;
}
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