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// file : build/search.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// 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 (const prerequisite_key& pk)
{
tracer trace ("search_existing_target");
const target_key& tk (pk.tk);
// Look for an existing target in this directory scope.
//
dir_path d;
if (tk.dir->absolute ())
d = *tk.dir; // Already normalized.
else
{
d = pk.scope->path ();
if (!tk.dir->empty ())
{
d /= *tk.dir;
d.normalize ();
}
}
auto i (targets.find (*tk.type, d, *tk.name, *tk.ext, trace));
if (i == targets.end ())
return 0;
target& t (**i);
level4 ([&]{trace << "existing target " << t << " for prerequisite "
<< pk;});
return &t;
}
target*
search_existing_file (const prerequisite_key& pk, const dir_paths& sp)
{
tracer trace ("search_existing_file");
const target_key& tk (pk.tk);
assert (tk.dir->relative ());
// Go over paths and extension looking for a file.
//
for (const dir_path& d: sp)
{
path f (d / *tk.dir / path (*tk.name));
f.normalize ();
// @@ TMP: use target name as an extension.
//
const string& e (*tk.ext != nullptr ? **tk.ext : tk.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 prerequisite "
<< pk;});
// Find or insert.
//
auto r (
targets.insert (
*tk.type, f.directory (), *tk.name, *tk.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 prerequisite " << pk;});
if (t.path ().empty ())
t.path (move (f));
t.mtime (mt);
return &t;
}
return nullptr;
}
target&
create_new_target (const prerequisite_key& pk)
{
tracer trace ("create_new_target");
const target_key& tk (pk.tk);
// We default to the target in this directory scope.
//
dir_path d;
if (tk.dir->absolute ())
d = *tk.dir; // Already normalized.
else
{
d = pk.scope->path ();
if (!tk.dir->empty ())
{
d /= *tk.dir;
d.normalize ();
}
}
// Find or insert.
//
auto r (targets.insert (*tk.type, move (d), *tk.name, *tk.ext, trace));
assert (r.second);
target& t (r.first);
level4 ([&]{trace << "new target " << t << " for prerequisite " << pk;});
return t;
}
}
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