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// file : tests/default-options/driver.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <cassert>
#ifndef __cpp_lib_modules_ts
#include <string>
#include <vector>
#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.path_io;
import butl.optional;
import butl.fdstream;
import butl.default_options;
#else
#include <libbutl/path.mxx>
#include <libbutl/path-io.mxx>
#include <libbutl/utility.mxx> // eof()
#include <libbutl/optional.mxx>
#include <libbutl/fdstream.mxx>
#include <libbutl/default-options.mxx>
#endif
using namespace std;
using namespace butl;
// Usage: argv[0] [-f <file>] [-d <start-dir>] [-s <sys-dir>] [-h <home-dir>]
// [-x <extra-dir>] [-e] [-t] <cmd-options>
//
// Parse default options files, merge them with the command line options, and
// print the resulting options to STDOUT one per line. Note that the options
// instance is a vector of arbitrary strings.
//
// -f
// Default options file name. Can be specified multiple times.
//
// -d
// Directory to start the default options files search from. Can be
// specified multiple times, in which case a common start (parent)
// directory is deduced.
//
// -s
// System directory.
//
// -h
// Home directory.
//
// -x
// Extra directory.
//
// -e
// Print the default options entries (rather than the merged options) to
// STDOUT one per line in the following format:
//
// <file>,<space-separated-options>,<remote>
//
// -t
// Trace the default options files search to STDERR.
//
int
main (int argc, const char* argv[])
{
using butl::optional;
class scanner
{
public:
scanner (const string& f): ifs_ (f, fdopen_mode::in, ifdstream::badbit) {}
optional<string>
next ()
{
string s;
return !eof (getline (ifs_, s)) ? optional<string> (move (s)) : nullopt;
}
private:
ifdstream ifs_;
};
enum class unknow_mode
{
fail
};
class options: public vector<string>
{
public:
bool
parse (scanner& s, unknow_mode, unknow_mode)
{
bool r (false);
while (optional<string> o = s.next ())
{
if (*o == "--no-default-options")
no_default_options_ = true;
push_back (move (*o));
r = true;
}
return r;
}
void
merge (const options& o)
{
insert (end (), o.begin (), o.end ());
}
bool
no_default_options () const noexcept
{
return no_default_options_;
}
private:
bool no_default_options_ = false;
};
// Parse and validate the arguments.
//
default_options_files fs;
optional<dir_path> sys_dir;
optional<dir_path> home_dir;
optional<dir_path> extra_dir;
vector<dir_path> dirs;
options cmd_ops;
bool print_entries (false);
bool trace (false);
for (int i (1); i != argc; ++i)
{
string op (argv[i]);
if (op == "-f")
{
assert (++i != argc);
fs.files.push_back (path (argv[i]));
}
else if (op == "-d")
{
assert (++i != argc);
dirs.emplace_back (argv[i]);
}
else if (op == "-s")
{
assert (++i != argc);
sys_dir = dir_path (argv[i]);
}
else if (op == "-h")
{
assert (++i != argc);
home_dir = dir_path (argv[i]);
}
else if (op == "-x")
{
assert (++i != argc);
extra_dir = dir_path (argv[i]);
}
else if (op == "-e")
{
print_entries = true;
}
else if (op == "-t")
{
trace = true;
}
else
cmd_ops.push_back (argv[i]);
}
// Deduce a common start directory.
//
fs.start = default_options_start (home_dir, dirs);
// Load and print the default options.
//
default_options<options> def_ops (
load_default_options<options, scanner, unknow_mode> (
sys_dir,
home_dir,
extra_dir,
fs,
[trace] (const path& f, bool remote, bool overwrite)
{
if (trace)
cerr << (overwrite ? "overwriting " : "loading ")
<< (remote ? "remote " : "local ") << f << endl;
}));
if (print_entries)
{
for (const default_options_entry<options>& e: def_ops)
{
cout << e.file << ',';
for (const string& o: e.options)
{
if (&o != &e.options[0])
cout << ' ';
cout << o;
}
cout << (e.remote ? ",true" : ",false") << endl;
}
}
// Merge the options and print the result.
//
options ops (merge_default_options (def_ops, cmd_ops));
if (!print_entries)
{
for (const string& o: ops)
cout << o << endl;
}
return 0;
}
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