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// file : build/search.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <build/search>
#include <utility> // move
#include <cassert>
#include <build/path>
#include <build/scope>
#include <build/target>
#include <build/prerequisite>
#include <build/timestamp>
#include <build/diagnostics>
using namespace std;
namespace build
{
target*
search_existing_target (prerequisite& p)
{
tracer trace ("search_existing_target");
assert (p.target == nullptr);
// Look for an existing target in this prerequisite's directory scope.
//
path d;
if (p.dir.absolute ())
d = p.dir; // Already normalized.
else
{
d = p.scope.path ();
if (!p.dir.empty ())
{
d /= p.dir;
d.normalize ();
}
}
auto i (targets.find (p.type.id, d, p.name, p.ext, trace));
if (i == targets.end ())
return 0;
target& t (**i);
level4 ([&]{trace << "existing target " << t << " for prerequsite "
<< p;});
p.target = &t;
return &t;
}
target*
search_existing_file (prerequisite& p, const paths& sp)
{
tracer trace ("search_existing_file");
assert (p.dir.relative ());
// Go over paths and extension looking for a file.
//
for (const path& d: sp)
{
path f (d / p.dir / path (p.name));
// @@ TMP: use target name as an extension.
//
const string& e (p.ext != nullptr ? *p.ext : p.type.name);
if (!e.empty ())
{
f += '.';
f += e;
}
timestamp mt (path_mtime (f));
if (mt == timestamp_nonexistent)
continue;
level4 ([&]{trace << "found existing file " << f << " for prerequsite "
<< p;});
// Find or insert.
//
auto r (targets.insert (p.type, f.directory (), p.name, p.ext, trace));
// Has to be a path_target.
//
path_target& t (dynamic_cast<path_target&> (r.first));
level4 ([&]{trace << (r.second ? "new" : "existing") << " target "
<< t << " for prerequsite " << p;});
t.path (move (f));
t.mtime (mt);
p.target = &t;
return &t;
}
return nullptr;
}
target&
create_new_target (prerequisite& p)
{
tracer trace ("search_new_target");
assert (p.target == nullptr);
// We default to the target in this prerequisite's directory scope.
//
path d;
if (p.dir.absolute ())
d = p.dir; // Already normalized.
else
{
d = p.scope.path ();
if (!p.dir.empty ())
{
d /= p.dir;
d.normalize ();
}
}
// Find or insert.
//
auto r (targets.insert (p.type, move (d), p.name, p.ext, trace));
assert (r.second);
target& t (r.first);
level4 ([&]{trace << "new target " << t << " for prerequsite " << p;});
p.target = &t;
return t;
}
}
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