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// file : build/context.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <build/context>
#include <ostream>
#include <cassert>
#include <system_error>
#include <build/scope>
#include <build/diagnostics>
using namespace std;
namespace build
{
path work;
path home;
execution_mode current_mode;
const target_rule_map* current_rules;
void
reset ()
{
targets.clear ();
scopes.clear ();
variable_pool.clear ();
// Create root scope. For Win32 we use the empty path since there
// is no such "real" root path. On POSIX, however, this is a real
// path. See the comment in <build/path-map> for details.
//
#ifdef _WIN32
root_scope = &scopes[path ()];
#else
root_scope = &scopes[path ("/")];
#endif
root_scope->variables["work"] = work;
root_scope->variables["home"] = home;
}
mkdir_status
mkdir (const path& d)
{
// We don't want to print the command if the directory already
// exists. This makes the below code a bit ugly.
//
mkdir_status ms;
try
{
ms = try_mkdir (d);
}
catch (const system_error& e)
{
if (verb >= 1)
text << "mkdir " << d.string ();
else
text << "mkdir " << d;
fail << "unable to create directory " << d.string () << ": "
<< e.what ();
}
if (ms == mkdir_status::success)
{
if (verb >= 1)
text << "mkdir " << d.string ();
else
text << "mkdir " << d;
}
return ms;
}
path
src_out (const path& out, scope& s)
{
return src_out (out,
s["out_root"].as<const path&> (),
s["src_root"].as<const path&> ());
}
path
out_src (const path& src, scope& s)
{
return out_src (src,
s["out_root"].as<const path&> (),
s["src_root"].as<const path&> ());
}
path
src_out (const path& o, const path& out_root, const path& src_root)
{
assert (o.sub (out_root));
return src_root / o.leaf (out_root);
}
path
out_src (const path& s, const path& out_root, const path& src_root)
{
assert (s.sub (src_root));
return out_root / s.leaf (src_root);
}
const path* relative_base = &work;
path
relative (const path& p)
{
const path& b (*relative_base);
if (b.empty ())
return p;
if (p.sub (b))
return p.leaf (b);
// If base is a sub-path of {src,out}_root and this path is also a
// sub-path of it, then use '..' to form a relative path.
//
// Don't think this is a good heuristic. For example, why shouldn't
// we display paths from imported projects as relative if they are
// more readable than absolute?
//
/*
if ((work.sub (src_root) && p.sub (src_root)) ||
(work.sub (out_root) && p.sub (out_root)))
return p.relative (work);
*/
if (p.root_directory () == b.root_directory ())
{
path r (p.relative (b));
if (r.string ().size () < p.string ().size ())
return r;
}
return p;
}
}
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