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// file : tests/builtin/driver.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <cassert>
#ifndef __cpp_lib_modules_ts
#include <string>
#include <vector>
#include <utility> // move()
#include <ostream>
#include <iostream>
#endif
// Other includes.
#ifdef __cpp_modules_ts
#ifdef __cpp_lib_modules_ts
import std.core;
import std.io;
#endif
import butl.path;
import butl.utility; // eof()
import butl.builtin;
import butl.optional;
import butl.timestamp; // to_stream(duration)
#else
#include <libbutl/path.mxx>
#include <libbutl/utility.mxx>
#include <libbutl/builtin.mxx>
#include <libbutl/optional.mxx>
#include <libbutl/timestamp.mxx>
#endif
using namespace std;
using namespace butl;
inline ostream&
operator<< (ostream& os, const path& p)
{
return os << p.representation ();
}
// Usage: argv[0] [-d <dir>] [-o <opt>] [-c] [-i] <builtin> <builtin-args>
//
// Execute the builtin and exit with its exit status.
//
// -d <dir> use as a current working directory
// -c use callbacks that, in particular, trace calls to stdout
// -o <opt> additional builtin option recognized by the callback
// -i read lines from stdin and append them to the builtin arguments
//
int
main (int argc, char* argv[])
{
using butl::optional;
cin.exceptions (ios::badbit);
cout.exceptions (ios::failbit | ios::badbit);
cerr.exceptions (ios::failbit | ios::badbit);
bool in (false);
dir_path cwd;
string option;
builtin_callbacks callbacks;
string name;
vector<string> args;
auto flag = [] (bool v) {return v ? "true" : "false";};
// Parse the driver options and arguments.
//
int i (1);
for (; i != argc; ++i)
{
string a (argv[i]);
if (a == "-d")
{
++i;
assert (i != argc);
cwd = dir_path (argv[i]);
}
else if (a == "-o")
{
++i;
assert (i != argc);
option = argv[i];
}
else if (a == "-c")
{
callbacks = builtin_callbacks (
[&flag] (const path& p, bool pre)
{
cout << "create " << p << ' ' << flag (pre) << endl;
},
[&flag] (const path& from, const path& to, bool force, bool pre)
{
cout << "move " << from << ' ' << to << ' ' << flag (force) << ' '
<< flag (pre) << endl;
},
[&flag] (const path& p, bool force, bool pre)
{
cout << "remove " << p << ' ' << flag (force) << ' ' << flag (pre)
<< endl;
},
[&option] (const vector<string>& args, size_t i)
{
cout << "option " << args[i] << endl;
return !option.empty () && args[i] == option ? 1 : 0;
},
[] (const duration& d)
{
cout << "sleep ";
to_stream (cout, d, false /* nanoseconds */);
cout << endl;
}
);
}
else if (a == "-i")
in = true;
else
break;
}
// Parse the builtin name and arguments.
//
assert (i != argc);
name = argv[i++];
for (; i != argc; ++i)
args.push_back (argv[i]);
// Read out additional arguments from stdin.
//
if (in)
{
string s;
while (!eof (getline (cin, s)))
args.push_back (move (s));
}
// Execute the builtin.
//
const builtin_info* bi (builtins.find (name));
if (bi == nullptr)
{
cerr << "unknown builtin '" << name << "'" << endl;
return 1;
}
if (bi->function == nullptr)
{
cerr << "external builtin '" << name << "'" << endl;
return 1;
}
uint8_t r; // Storage.
builtin b (bi->function (r, args, nullfd, nullfd, nullfd, cwd, callbacks));
return b.wait ();
}
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