mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 21:20:11 +01:00
Jon Ross-Perkins
0b9bda10b7
1) toolchain and explorer use the same working dir logic, share it 2) explorer's carbon.cpp and main_bin.cpp use the same relative path logic, share it 3) You can append a longer path in one call with the right kind of iterator 4) Fix what's maybe a bug in passing `relative_prelude_path.str()` to `cl::init` 5) Collapse Main and ExplorerMain to avoid passing more parameters between
126 lines
4.1 KiB
C++
126 lines
4.1 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "explorer/main.h"
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#include <unistd.h>
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#include <cstdio>
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#include <cstring>
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#include <iostream>
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#include <optional>
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#include <string>
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#include <vector>
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#include "common/error.h"
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#include "explorer/common/arena.h"
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#include "explorer/common/nonnull.h"
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#include "explorer/interpreter/exec_program.h"
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#include "explorer/syntax/parse.h"
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#include "explorer/syntax/prelude.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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namespace Carbon {
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namespace cl = llvm::cl;
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namespace path = llvm::sys::path;
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auto ExplorerMain(int argc, char** argv, void* static_for_main_addr,
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llvm::StringRef relative_prelude_path) -> int {
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llvm::setBugReportMsg(
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"Please report issues to "
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"https://github.com/carbon-language/carbon-lang/issues and include the "
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"crash backtrace.\n");
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llvm::InitLLVM init_llvm(argc, argv);
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// Printing to stderr should flush stdout. This is most noticeable when stderr
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// is piped to stdout.
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llvm::errs().tie(&llvm::outs());
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cl::opt<std::string> input_file_name(cl::Positional, cl::desc("<input file>"),
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cl::Required);
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cl::opt<bool> parser_debug("parser_debug",
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cl::desc("Enable debug output from the parser"));
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cl::opt<std::string> trace_file_name(
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"trace_file",
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cl::desc("Output file for tracing; set to `-` to output to stdout."));
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// Use the executable path as a base for the relative prelude path.
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std::string exe =
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llvm::sys::fs::getMainExecutable(argv[0], static_for_main_addr);
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llvm::StringRef install_path = path::parent_path(exe);
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llvm::SmallString<256> default_prelude_file(install_path);
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path::append(default_prelude_file,
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path::begin(relative_prelude_path, path::Style::posix),
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path::end(relative_prelude_path));
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std::string default_prelude_file_str(default_prelude_file);
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cl::opt<std::string> prelude_file_name("prelude", cl::desc("<prelude file>"),
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cl::init(default_prelude_file_str));
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cl::ParseCommandLineOptions(argc, argv);
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// Set up a stream for trace output.
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std::unique_ptr<llvm::raw_ostream> scoped_trace_stream;
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std::optional<Nonnull<llvm::raw_ostream*>> trace_stream;
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if (!trace_file_name.empty()) {
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if (trace_file_name == "-") {
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trace_stream = &llvm::outs();
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} else {
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std::error_code err;
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scoped_trace_stream =
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std::make_unique<llvm::raw_fd_ostream>(trace_file_name, err);
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if (err) {
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llvm::errs() << err.message() << "\n";
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return EXIT_FAILURE;
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}
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trace_stream = scoped_trace_stream.get();
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}
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}
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Arena arena;
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AST ast;
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if (ErrorOr<AST> parse_result = Parse(&arena, input_file_name, parser_debug);
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parse_result.ok()) {
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ast = *std::move(parse_result);
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} else {
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llvm::errs() << "SYNTAX ERROR: " << parse_result.error() << "\n";
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return EXIT_FAILURE;
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}
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AddPrelude(prelude_file_name, &arena, &ast.declarations);
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// Semantically analyze the parsed program.
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if (ErrorOr<AST> analyze_result = AnalyzeProgram(&arena, ast, trace_stream);
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analyze_result.ok()) {
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ast = *std::move(analyze_result);
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} else {
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llvm::errs() << "COMPILATION ERROR: " << analyze_result.error() << "\n";
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return EXIT_FAILURE;
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}
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// Run the program.
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if (ErrorOr<int> exec_result = ExecProgram(&arena, ast, trace_stream);
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exec_result.ok()) {
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// Print the return code to stdout.
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llvm::outs() << "result: " << *exec_result << "\n";
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// When there's a dedicated trace file, print the return code to it too.
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if (scoped_trace_stream) {
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**trace_stream << "result: " << *exec_result << "\n";
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}
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} else {
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llvm::errs() << "RUNTIME ERROR: " << exec_result.error() << "\n";
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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} // namespace Carbon
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