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// file : bbot/utility.txx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <butl/fdstream>
#include <butl/manifest-parser>
#include <butl/manifest-serializer>
#include <bbot/diagnostics>
namespace bbot
{
template <typename I, typename O, typename E, typename P, typename... A>
process
run_io_start (tracer& t,
I&& in,
O&& out,
E&& err,
const dir_path& cwd,
P&& p,
A&&... args)
{
try
{
return butl::process_start (
[&t] (const char* c[], size_t n) {run_trace (t, c, n);},
forward<I> (in),
forward<O> (out),
forward<E> (err),
cwd,
p,
forward<A> (args)...);
}
catch (const process_error& e)
{
fail << "unable to execute " << p << ": " << e << endf;
}
}
template <typename P>
process_exit::code_type
run_io_finish_exit (tracer&, process& pr, P&& p)
{
try
{
pr.wait ();
if (!pr.exit->normal ())
fail << "process " << p << " terminated abnormally: "
<< pr.exit->description ();
return pr.exit->code ();
}
catch (const process_error& e)
{
fail << "unable to execute " << p << ": " << e << endf;
}
}
template <typename P>
inline void
run_io_finish (tracer& t, process& pr, P&& p)
{
if (run_io_finish_exit (t, pr, p) != 0)
fail << "process " << p << " terminated with non-zero exit code";
}
template <typename I, typename O, typename E, typename P, typename... A>
inline process_exit::code_type
run_io_exit (tracer& t, I&& in, O&& out, E&& err, const P& p, A&&... args)
{
process pr (run_io_start (t,
forward<I> (in),
forward<O> (out),
forward<E> (err),
dir_path (),
p,
forward<A> (args)...));
return run_io_finish_exit (t, pr, p);
}
template <typename I, typename O, typename E, typename P, typename... A>
inline void
run_io (tracer& t, I&& in, O&& out, E&& err, const P& p, A&&... args)
{
process pr (run_io_start (t,
forward<I> (in),
forward<O> (out),
forward<E> (err),
dir_path (),
p,
forward<A> (args)...));
run_io_finish (t, pr, p);
}
template <typename T>
T
parse_manifest (const path& f, const char* what, bool ignore_unknown)
{
using namespace butl;
try
{
if (!file_exists (f))
fail << what << " manifest file " << f << " does not exist";
ifdstream ifs (f);
manifest_parser p (ifs, f.string ());
return T (p, ignore_unknown);
}
catch (const manifest_parsing& e)
{
fail << "invalid " << what << " manifest: "
<< f << ':' << e.line << ':' << e.column << ": " << e.description
<< endf;
}
catch (const io_error& e)
{
fail << "unable to read " << what << " manifest " << f << ": " << e
<< endf;
}
catch (const system_error& e) // EACCES, etc.
{
fail << "unable to access " << what << " manifest " << f << ": " << e
<< endf;
}
}
template <typename T>
void
serialize_manifest (const T& m, const path& f, const char* what)
{
using namespace std;
using namespace butl;
try
{
ofdstream ofs (f, ios::binary);
auto_rmfile arm (f); // Try to remove on failure ignoring errors.
serialize_manifest (m, ofs, f.string (), what);
ofs.close ();
arm.cancel ();
}
catch (const system_error& e) // EACCES, etc.
{
fail << "unable to access " << what << " manifest " << f << ": " << e;
}
}
template <typename T>
void
serialize_manifest (const T& m,
ostream& os,
const string& name,
const char* what)
{
using namespace std;
using namespace butl;
try
{
manifest_serializer s (os, name);
m.serialize (s);
}
catch (const manifest_serialization& e)
{
fail << "invalid " << what << " manifest: " << e.description;
}
catch (const io_error& e)
{
fail << "unable to write " << what << " manifest " << name << ": " << e;
}
}
}
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