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// file : build/prerequisite.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build/prerequisite>
#include <ostream>
#include <build/scope>
#include <build/target> // target_type
#include <build/context>
#include <build/diagnostics>
using namespace std;
namespace build
{
// prerequisite_key
//
ostream&
operator<< (ostream& os, const prerequisite_key& pk)
{
if (pk.proj != nullptr)
os << *pk.proj << '%';
// Don't print scope if we are project-qualified or the
// prerequisite's directory is absolute. In both these
// cases the scope is not used to resolve it to target.
//
else if (!pk.tk.dir->absolute ())
{
string s (diag_relative (pk.scope->out_path (), false));
if (!s.empty ())
os << s << ':';
}
return os << pk.tk;
}
// prerequisite_set
//
auto prerequisite_set::
insert (const std::string* proj,
const target_type& tt,
dir_path dir,
std::string name,
const std::string* ext,
scope& s,
tracer& trace) -> pair<prerequisite&, bool>
{
//@@ OPT: would be nice to somehow first check if this prerequisite is
// already in the set before allocating a new instance.
// Find or insert.
//
auto r (emplace (proj, tt, move (dir), move (name), ext, s));
prerequisite& p (const_cast<prerequisite&> (*r.first));
// Update extension if the existing prerequisite has it unspecified.
//
if (p.ext != ext)
{
level5 ([&]{
diag_record r (trace);
r << "assuming prerequisite " << p << " is the same as the "
<< "one with ";
if (ext == nullptr)
r << "unspecified extension";
else if (ext->empty ())
r << "no extension";
else
r << "extension " << *ext;
});
if (ext != nullptr)
p.ext = ext;
}
return pair<prerequisite&, bool> (p, r.second);
}
}
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