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// file : bpkg/utility.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <bpkg/utility>
#include <iostream> // cout, cin
#include <butl/process>
#include <bpkg/diagnostics>
#include <bpkg/common-options>
using namespace std;
using namespace butl;
namespace bpkg
{
bool
yn_prompt (const char* prompt, char def)
{
// Writing a robust Y/N prompt is more difficult than one would
// expect...
//
string a;
do
{
*diag_stream << prompt << ' ';
// getline() will set the failbit if it failed to extract anything,
// not even the delimiter and eofbit if it reached eof before seeing
// the delimiter.
//
getline (cin, a);
bool f (cin.fail ());
bool e (cin.eof ());
if (f || e)
*diag_stream << endl; // Assume no delimiter (newline).
if (f)
fail << "unable to read y/n answer from STDOUT";
if (a.empty () && def != '\0')
{
// Don't treat eof as the default answer. We need to see the
// actual newline.
//
if (!e)
a = def;
}
} while (a != "y" && a != "n");
return a == "y";
}
bool
exists (const path& f)
{
try
{
return file_exists (f);
}
catch (const system_error& e)
{
error << "unable to stat path " << f << ": " << e.what ();
throw failed ();
}
}
bool
exists (const dir_path& d)
{
try
{
return dir_exists (d);
}
catch (const system_error& e)
{
error << "unable to stat path " << d << ": " << e.what ();
throw failed ();
}
}
bool
empty (const dir_path& d)
{
try
{
dir_iterator i (d);
return i == end (i);
}
catch (const system_error& e)
{
error << "unable to scan directory " << d << ": " << e.what ();
throw failed ();
}
}
void
mk (const dir_path& d)
{
if (verb >= 3)
text << "mkdir " << d;
try
{
try_mkdir (d);
}
catch (const system_error& e)
{
fail << "unable to create directory " << d << ": " << e.what ();
}
}
void
mk_p (const dir_path& d)
{
if (verb >= 3)
text << "mkdir -p " << d;
try
{
try_mkdir_p (d);
}
catch (const system_error& e)
{
fail << "unable to create directory " << d << ": " << e.what ();
}
}
void
rm (const path& f)
{
if (verb >= 3)
text << "rm " << f;
try
{
if (try_rmfile (f) == rmfile_status::not_exist)
fail << "unable to remove file " << f << ": file does not exist";
}
catch (const system_error& e)
{
fail << "unable to remove file " << f << ": " << e.what ();
}
}
void
rm_r (const dir_path& d, bool dir)
{
if (verb >= 3)
text << "rmdir -r " << d << (dir ? "" : "*");
try
{
rmdir_r (d, dir);
}
catch (const system_error& e)
{
fail << "unable to remove " << (dir ? "" : "contents of ")
<< "directory " << d << ": " << e.what ();
}
}
void
run (const char* const args[])
{
if (verb >= 2)
print_process (args);
try
{
process pr (args);
if (!pr.wait ())
throw failed (); // Assume the child issued diagnostics.
}
catch (const process_error& e)
{
error << "unable to execute " << args[0] << ": " << e.what ();
if (e.child ())
exit (1);
throw failed ();
}
}
void
run_b (const common_options& co,
const string& bspec,
bool quiet,
const strings& vars1,
const strings& vars2)
{
cstrings args {co.build ().string ().c_str ()};
// Map verbosity level. If we are running quiet or at level 1,
// then run build2 quiet. Otherwise, run it at the same level
// as us.
//
string vl;
if (verb <= (quiet ? 1 : 0))
args.push_back ("-q");
else if (verb == 2)
args.push_back ("-v");
else if (verb > 2)
{
vl = to_string (verb);
args.push_back ("--verbose");
args.push_back (vl.c_str ());
}
// Add user options.
//
for (const string& o: co.build_option ())
args.push_back (o.c_str ());
// Add config vars.
//
for (const string& v: vars1)
args.push_back (v.c_str ());
for (const string& v: vars2)
args.push_back (v.c_str ());
// Add buildspec.
//
args.push_back (bspec.c_str ());
args.push_back (nullptr);
run (args);
}
bool exception_unwinding_dtor = false;
}
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