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// file : build2/utility.txx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
namespace build2
{
template <typename T>
T
run (const char* const* args,
T (*f) (string&),
bool err,
bool ignore_exit,
sha256* checksum)
{
process pr (start_run (args, err));
ifdstream is (pr.in_ofd);
T r;
string l; // Last line of output.
while (is.peek () != ifdstream::traits_type::eof () && // Keep last line.
getline (is, l))
{
trim (l);
if (checksum != nullptr)
checksum->append (l);
if (r.empty ())
r = f (l);
}
is.close (); // Don't block.
if (!(finish_run (args, err, pr, l) || ignore_exit))
r = T ();
return r;
}
}
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