lean2/src/shell/lean.cpp

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/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#include <iostream>
#include <fstream>
#include <signal.h>
#include <cstdlib>
#include <getopt.h>
#include <string>
#include "util/stackinfo.h"
#include "util/debug.h"
#include "util/interrupt.h"
#include "util/script_state.h"
#include "util/thread.h"
#include "util/thread_script_state.h"
#include "util/lean_path.h"
#include "kernel/environment.h"
#include "kernel/kernel_exception.h"
#include "kernel/formatter.h"
#include "library/standard_kernel.h"
#include "library/hott_kernel.h"
#include "library/module.h"
#include "library/io_state_stream.h"
#include "library/error_handling/error_handling.h"
#include "frontends/lean/parser.h"
#include "frontends/lean/pp.h"
#include "frontends/lean/interactive.h"
#include "frontends/lean/dependencies.h"
#include "frontends/lua/register_modules.h"
#include "version.h"
#include "githash.h" // NOLINT
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using lean::script_state;
using lean::unreachable_reached;
using lean::environment;
using lean::io_state;
using lean::io_state_stream;
using lean::regular;
using lean::mk_environment;
using lean::mk_hott_environment;
using lean::set_environment;
using lean::set_io_state;
enum class input_kind { Unspecified, Lean, Lua };
static void on_ctrl_c(int ) {
lean::request_interrupt();
}
static void display_header(std::ostream & out) {
out << "Lean (version " << LEAN_VERSION_MAJOR << "." << LEAN_VERSION_MINOR << ", commit " << std::string(g_githash).substr(0, 12) << ")\n";
}
static void display_help(std::ostream & out) {
display_header(out);
std::cout << "Input format:\n";
std::cout << " --lean use parser for Lean default input format for files,\n";
std::cout << " with unknown extension (default)\n";
std::cout << " --lua use Lua parser for files with unknown extension\n";
std::cout << "Miscellaneous:\n";
std::cout << " --help -h display this message\n";
std::cout << " --version -v display version number\n";
std::cout << " --githash display the git commit hash number used to build this binary\n";
std::cout << " --path display the path used for finding Lean libraries and extensions\n";
std::cout << " --output=file -o save the final environment in binary format in the given file\n";
std::cout << " --luahook=num -c how often the Lua interpreter checks the interrupted flag,\n";
std::cout << " it is useful for interrupting non-terminating user scripts,\n";
std::cout << " 0 means 'do not check'.\n";
std::cout << " --trust=num -t trust level (default: 0) \n";
std::cout << " --quiet -q do not print verbose messages\n";
std::cout << " --interactive -i read blocks of commands from the input stream\n";
std::cout << " --hott use Homotopy Type Theory kernel and libraries\n";
std::cout << " --threads=num -r number of threads used to process lean files\n";
std::cout << " --deps just print dependencies of a Lean input\n";
#if defined(LEAN_USE_BOOST)
std::cout << " --tstack=num -s thread stack size in Kb\n";
#endif
}
static char const * get_file_extension(char const * fname) {
if (fname == 0)
return 0;
char const * last_dot = 0;
while (true) {
char const * tmp = strchr(fname, '.');
if (tmp == 0) {
return last_dot;
}
last_dot = tmp + 1;
fname = last_dot;
}
}
static struct option g_long_options[] = {
{"version", no_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{"lean", no_argument, 0, 'l'},
{"lua", no_argument, 0, 'u'},
{"path", no_argument, 0, 'p'},
{"luahook", required_argument, 0, 'c'},
{"githash", no_argument, 0, 'g'},
{"output", required_argument, 0, 'o'},
{"trust", required_argument, 0, 't'},
{"interactive", no_argument, 0, 'i'},
{"quiet", no_argument, 0, 'q'},
{"hott", no_argument, 0, 'H'},
{"threads", required_argument, 0, 'r'},
{"deps", no_argument, 0, 'D'},
#if defined(LEAN_USE_BOOST)
{"tstack", required_argument, 0, 's'},
#endif
{0, 0, 0, 0}
};
#if defined(LEAN_USE_BOOST)
static char const * g_opt_str = "DHiqlupgvhr:012c:012s:012t:012o:";
#else
static char const * g_opt_str = "DHiqlupgvhr:012c:012t:012o:";
#endif
enum class lean_mode { Standard, HoTT };
int main(int argc, char ** argv) {
lean::save_stack_info();
lean::register_modules();
bool export_objects = false;
unsigned trust_lvl = 0;
bool quiet = false;
bool interactive = false;
bool only_deps = false;
lean_mode mode = lean_mode::Standard;
unsigned num_threads = 1;
std::string output;
input_kind default_k = input_kind::Lean; // default
while (true) {
int c = getopt_long(argc, argv, g_opt_str, g_long_options, NULL);
if (c == -1)
break; // end of command line
switch (c) {
case 'r':
num_threads = atoi(optarg);
break;
case 'H':
mode = lean_mode::HoTT;
lean::init_lean_path("hott");
break;
case 'i':
interactive = true;
break;
case 'v':
display_header(std::cout);
return 0;
case 'g':
std::cout << g_githash << "\n";
return 0;
case 'h':
display_help(std::cout);
return 0;
case 'l':
default_k = input_kind::Lean;
break;
case 'u':
default_k = input_kind::Lua;
break;
case 'c':
script_state::set_check_interrupt_freq(atoi(optarg));
break;
case 'p':
std::cout << lean::get_lean_path() << "\n";
return 0;
case 's':
lean::set_thread_stack_size(atoi(optarg)*1024);
break;
case 'o':
output = optarg;
export_objects = true;
break;
case 't':
trust_lvl = atoi(optarg);
break;
case 'q':
quiet = true;
break;
case 'D':
only_deps = true;
break;
default:
std::cerr << "Unknown command line option\n";
display_help(std::cerr);
return 1;
}
}
environment env = mode == lean_mode::Standard ? mk_environment(trust_lvl) : mk_hott_environment(trust_lvl);
io_state ios(lean::mk_pretty_formatter_factory());
if (quiet)
ios.set_option("verbose", false);
script_state S = lean::get_thread_script_state();
set_environment set1(S, env);
set_io_state set2(S, ios);
try {
bool ok = true;
for (int i = optind; i < argc; i++) {
char const * ext = get_file_extension(argv[i]);
input_kind k = default_k;
if (ext) {
if (strcmp(ext, "lean") == 0) {
k = input_kind::Lean;
} else if (strcmp(ext, "lua") == 0) {
k = input_kind::Lua;
}
}
if (k == input_kind::Lean) {
if (only_deps) {
display_deps(env, std::cout, argv[i]);
} else if (!parse_commands(env, ios, argv[i], false, num_threads)) {
ok = false;
}
} else if (k == input_kind::Lua) {
try {
lean::system_import(argv[i]);
} catch (lean::exception & ex) {
::lean::display_error(regular(env, ios), nullptr, ex);
ok = false;
}
} else {
lean_unreachable(); // LCOV_EXCL_LINE
}
}
if (ok && interactive && default_k == input_kind::Lean) {
signal(SIGINT, on_ctrl_c);
lean::interactive in(env, ios, num_threads);
in(std::cin, "[stdin]");
}
if (export_objects && ok) {
std::ofstream out(output, std::ofstream::binary);
export_module(out, env);
}
return ok ? 0 : 1;
} catch (lean::exception & ex) {
::lean::display_error(regular(env, ios), nullptr, ex);
}
return 1;
}