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// file : bpkg/utility -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BPKG_UTILITY
#define BPKG_UTILITY
#include <memory> // make_shared()
#include <string> // to_string()
#include <utility> // move(), forward(), declval(), make_pair()
#include <cassert> // assert()
#include <iterator> // make_move_iterator()
#include <butl/utility> // casecmp(), reverse_iterate()
#include <exception> // uncaught_exception()
#include <butl/filesystem>
#include <bpkg/types>
namespace bpkg
{
using std::move;
using std::forward;
using std::declval;
using std::make_pair;
using std::make_shared;
using std::make_move_iterator;
using std::to_string;
// <butl/utility>
//
using butl::casecmp;
using butl::reverse_iterate;
// Widely-used paths.
//
extern const dir_path bpkg_dir; // .bpkg/
extern const dir_path certs_dir; // .bpkg/certs/
// Y/N prompt. The def argument, if specified, should be either 'y'
// or 'n'. It is used as the default answer, in case the user just
// hits enter. Issue diagnostics and throw failed if no answer could
// be extracted from STDOUT (e.g., because it was closed).
//
bool
yn_prompt (const char* prompt, char def = '\0');
// Filesystem.
//
bool
exists (const path&);
bool
exists (const dir_path&);
bool
empty (const dir_path&);
void
mk (const dir_path&);
void
mk_p (const dir_path&);
void
rm (const path&);
void
rm_r (const dir_path&, bool dir = true);
using auto_rm = butl::auto_rmfile;
using auto_rm_r = butl::auto_rmdir;
// Process.
//
// By default the process command line is printed for verbosity >= 2
// (essential command lines).
//
// If fallback is specified, then this directory is searched for the
// executable as a last resort.
//
void
run (const char* args[], const dir_path& fallback = dir_path ());
inline void
run (cstrings& args, const dir_path& fallback = dir_path ())
{
run (args.data (), fallback);
}
// Directory extracted from argv[0] (i.e., this process' recall directory)
// or empty if there is none. Can be used as a search fallback.
//
extern dir_path exec_dir;
// Run build2, mapping verbosity levels. If quiet is true, then run build2
// quiet if our verbosity level is 1. Common vars (cvars) are set on the
// configuration scope.
//
class common_options;
const char*
name_b (const common_options&);
void
run_b (const common_options&,
const dir_path& configuration,
const string& buildspec,
bool quiet = false,
const strings& pvars = strings (),
const strings& cvars = strings ());
// Call a function if there is an exception.
//
// True means we are in the body of a destructor that is being
// called as part of the exception stack unwindining. Used to
// compensate for the deficiencies of uncaught_exception() until
// C++17 uncaught_exceptions() becomes available.
//
// @@ MT: will have to be TLS.
//
extern bool exception_unwinding_dtor;
template <typename F>
struct exception_guard;
template <typename F>
inline exception_guard<F>
make_exception_guard (F f)
{
return exception_guard<F> (std::move (f));
}
template <typename F>
struct exception_guard
{
exception_guard (F f): f_ (std::move (f)) {}
~exception_guard ()
{
if (std::uncaught_exception ())
{
exception_unwinding_dtor = true;
f_ ();
exception_unwinding_dtor = false;
}
}
private:
F f_;
};
}
#endif // BPKG_UTILITY
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