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ladybird/Userland/Utilities/js.cpp
Maciej efd9c70d94 js: Don't try to run empty scripts 
When you try to run script containing only whitespace, it will return
undefined and doesn't do anything anyway. Let's match NodeJS behavior
and just don't display anything.

This only applies to REPL input and not to modules.
2022-03-08 07:47:24 -05:00

1673 lines
66 KiB
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/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/ByteBuffer.h>
#include <AK/Format.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/StringBuilder.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/StandardPaths.h>
#include <LibCore/System.h>
#include <LibJS/AST.h>
#include <LibJS/Bytecode/BasicBlock.h>
#include <LibJS/Bytecode/Generator.h>
#include <LibJS/Bytecode/Interpreter.h>
#include <LibJS/Bytecode/PassManager.h>
#include <LibJS/Console.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/ArrayBuffer.h>
#include <LibJS/Runtime/BooleanObject.h>
#include <LibJS/Runtime/DataView.h>
#include <LibJS/Runtime/Date.h>
#include <LibJS/Runtime/DatePrototype.h>
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/FunctionObject.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/Collator.h>
#include <LibJS/Runtime/Intl/DateTimeFormat.h>
#include <LibJS/Runtime/Intl/DisplayNames.h>
#include <LibJS/Runtime/Intl/ListFormat.h>
#include <LibJS/Runtime/Intl/Locale.h>
#include <LibJS/Runtime/Intl/NumberFormat.h>
#include <LibJS/Runtime/Intl/PluralRules.h>
#include <LibJS/Runtime/Intl/RelativeTimeFormat.h>
#include <LibJS/Runtime/Intl/Segmenter.h>
#include <LibJS/Runtime/Intl/Segments.h>
#include <LibJS/Runtime/JSONObject.h>
#include <LibJS/Runtime/Map.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/NumberObject.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Promise.h>
#include <LibJS/Runtime/ProxyObject.h>
#include <LibJS/Runtime/RegExpObject.h>
#include <LibJS/Runtime/Set.h>
#include <LibJS/Runtime/ShadowRealm.h>
#include <LibJS/Runtime/Shape.h>
#include <LibJS/Runtime/StringObject.h>
#include <LibJS/Runtime/StringPrototype.h>
#include <LibJS/Runtime/Temporal/Calendar.h>
#include <LibJS/Runtime/Temporal/Duration.h>
#include <LibJS/Runtime/Temporal/Instant.h>
#include <LibJS/Runtime/Temporal/PlainDate.h>
#include <LibJS/Runtime/Temporal/PlainDateTime.h>
#include <LibJS/Runtime/Temporal/PlainMonthDay.h>
#include <LibJS/Runtime/Temporal/PlainTime.h>
#include <LibJS/Runtime/Temporal/PlainYearMonth.h>
#include <LibJS/Runtime/Temporal/TimeZone.h>
#include <LibJS/Runtime/Temporal/ZonedDateTime.h>
#include <LibJS/Runtime/TypedArray.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/SourceTextModule.h>
#include <LibLine/Editor.h>
#include <LibMain/Main.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
RefPtr<JS::VM> vm;
Vector<String> repl_statements;
JS::Handle<JS::Value> last_value = JS::make_handle(JS::js_undefined());
class ReplObject final : public JS::GlobalObject {
JS_OBJECT(ReplObject, JS::GlobalObject);
public:
ReplObject() = default;
virtual void initialize_global_object() override;
virtual ~ReplObject() override = default;
private:
JS_DECLARE_NATIVE_FUNCTION(exit_interpreter);
JS_DECLARE_NATIVE_FUNCTION(repl_help);
JS_DECLARE_NATIVE_FUNCTION(load_file);
JS_DECLARE_NATIVE_FUNCTION(save_to_file);
JS_DECLARE_NATIVE_FUNCTION(load_json);
JS_DECLARE_NATIVE_FUNCTION(last_value_getter);
JS_DECLARE_NATIVE_FUNCTION(print);
};
class ScriptObject final : public JS::GlobalObject {
JS_OBJECT(ScriptObject, JS::GlobalObject);
public:
ScriptObject() = default;
virtual void initialize_global_object() override;
virtual ~ScriptObject() override = default;
private:
JS_DECLARE_NATIVE_FUNCTION(load_file);
JS_DECLARE_NATIVE_FUNCTION(load_json);
JS_DECLARE_NATIVE_FUNCTION(print);
};
static bool s_dump_ast = false;
static bool s_run_bytecode = false;
static bool s_opt_bytecode = false;
static bool s_as_module = false;
static bool s_print_last_result = false;
static bool s_strip_ansi = false;
static bool s_disable_source_location_hints = false;
static RefPtr<Line::Editor> s_editor;
static String s_history_path = String::formatted("{}/.js-history", Core::StandardPaths::home_directory());
static int s_repl_line_level = 0;
static bool s_fail_repl = false;
static String prompt_for_level(int level)
{
static StringBuilder prompt_builder;
prompt_builder.clear();
prompt_builder.append("> ");
for (auto i = 0; i < level; ++i)
prompt_builder.append(" ");
return prompt_builder.build();
}
static String read_next_piece()
{
StringBuilder piece;
auto line_level_delta_for_next_line { 0 };
do {
auto line_result = s_editor->get_line(prompt_for_level(s_repl_line_level));
line_level_delta_for_next_line = 0;
if (line_result.is_error()) {
s_fail_repl = true;
return "";
}
auto& line = line_result.value();
s_editor->add_to_history(line);
piece.append(line);
piece.append('\n');
auto lexer = JS::Lexer(line);
enum {
NotInLabelOrObjectKey,
InLabelOrObjectKeyIdentifier,
InLabelOrObjectKey
} label_state { NotInLabelOrObjectKey };
for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
switch (token.type()) {
case JS::TokenType::BracketOpen:
case JS::TokenType::CurlyOpen:
case JS::TokenType::ParenOpen:
label_state = NotInLabelOrObjectKey;
s_repl_line_level++;
break;
case JS::TokenType::BracketClose:
case JS::TokenType::CurlyClose:
case JS::TokenType::ParenClose:
label_state = NotInLabelOrObjectKey;
s_repl_line_level--;
break;
case JS::TokenType::Identifier:
case JS::TokenType::StringLiteral:
if (label_state == NotInLabelOrObjectKey)
label_state = InLabelOrObjectKeyIdentifier;
else
label_state = NotInLabelOrObjectKey;
break;
case JS::TokenType::Colon:
if (label_state == InLabelOrObjectKeyIdentifier)
label_state = InLabelOrObjectKey;
else
label_state = NotInLabelOrObjectKey;
break;
default:
break;
}
}
if (label_state == InLabelOrObjectKey) {
// If there's a label or object literal key at the end of this line,
// prompt for more lines but do not change the line level.
line_level_delta_for_next_line += 1;
}
} while (s_repl_line_level + line_level_delta_for_next_line > 0);
return piece.to_string();
}
static String strip_ansi(StringView format_string)
{
if (format_string.is_empty())
return String::empty();
StringBuilder builder;
size_t i;
for (i = 0; i < format_string.length() - 1; ++i) {
if (format_string[i] == '\033' && format_string[i + 1] == '[') {
while (i < format_string.length() && format_string[i] != 'm')
++i;
} else {
builder.append(format_string[i]);
}
}
if (i < format_string.length())
builder.append(format_string[i]);
return builder.to_string();
}
template<typename... Parameters>
static void js_out(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters)
{
if (!s_strip_ansi)
return out(move(fmtstr), parameters...);
auto stripped_fmtstr = strip_ansi(fmtstr.view());
out(stripped_fmtstr, parameters...);
}
template<typename... Parameters>
static void js_outln(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... parameters)
{
if (!s_strip_ansi)
return outln(move(fmtstr), parameters...);
auto stripped_fmtstr = strip_ansi(fmtstr.view());
outln(stripped_fmtstr, parameters...);
}
inline void js_outln() { outln(); }
static void print_value(JS::Value value, HashTable<JS::Object*>& seen_objects);
static void print_type(FlyString const& name)
{
js_out("[\033[36;1m{}\033[0m]", name);
}
static void print_separator(bool& first)
{
js_out(first ? " " : ", ");
first = false;
}
static void print_array(JS::Array& array, HashTable<JS::Object*>& seen_objects)
{
js_out("[");
bool first = true;
for (auto it = array.indexed_properties().begin(false); it != array.indexed_properties().end(); ++it) {
print_separator(first);
auto value_or_error = array.get(it.index());
// The V8 repl doesn't throw an exception here, and instead just
// prints 'undefined'. We may choose to replicate that behavior in
// the future, but for now lets just catch the error
if (value_or_error.is_error())
return;
auto value = value_or_error.release_value();
print_value(value, seen_objects);
}
if (!first)
js_out(" ");
js_out("]");
}
static void print_object(JS::Object& object, HashTable<JS::Object*>& seen_objects)
{
js_out("{{");
bool first = true;
for (auto& entry : object.indexed_properties()) {
print_separator(first);
js_out("\"\033[33;1m{}\033[0m\": ", entry.index());
auto value_or_error = object.get(entry.index());
// The V8 repl doesn't throw an exception here, and instead just
// prints 'undefined'. We may choose to replicate that behavior in
// the future, but for now lets just catch the error
if (value_or_error.is_error())
return;
auto value = value_or_error.release_value();
print_value(value, seen_objects);
}
for (auto& it : object.shape().property_table_ordered()) {
print_separator(first);
if (it.key.is_string()) {
js_out("\"\033[33;1m{}\033[0m\": ", it.key.to_display_string());
} else {
js_out("[\033[33;1m{}\033[0m]: ", it.key.to_display_string());
}
print_value(object.get_direct(it.value.offset), seen_objects);
}
if (!first)
js_out(" ");
js_out("}}");
}
static void print_function(JS::Object const& object, HashTable<JS::Object*>&)
{
print_type(object.class_name());
if (is<JS::ECMAScriptFunctionObject>(object))
js_out(" {}", static_cast<JS::ECMAScriptFunctionObject const&>(object).name());
else if (is<JS::NativeFunction>(object))
js_out(" {}", static_cast<JS::NativeFunction const&>(object).name());
}
static void print_date(JS::Object const& object, HashTable<JS::Object*>&)
{
print_type("Date");
js_out(" \033[34;1m{}\033[0m", JS::to_date_string(static_cast<JS::Date const&>(object).date_value()));
}
static void print_error(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto name = object.get_without_side_effects(vm->names.name).value_or(JS::js_undefined());
auto message = object.get_without_side_effects(vm->names.message).value_or(JS::js_undefined());
if (name.is_accessor() || message.is_accessor()) {
print_value(&object, seen_objects);
} else {
auto name_string = name.to_string_without_side_effects();
auto message_string = message.to_string_without_side_effects();
print_type(name_string);
if (!message_string.is_empty())
js_out(" \033[31;1m{}\033[0m", message_string);
}
}
static void print_regexp_object(JS::Object const& object, HashTable<JS::Object*>&)
{
auto& regexp_object = static_cast<JS::RegExpObject const&>(object);
print_type("RegExp");
js_out(" \033[34;1m/{}/{}\033[0m", regexp_object.escape_regexp_pattern(), regexp_object.flags());
}
static void print_proxy_object(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& proxy_object = static_cast<JS::ProxyObject const&>(object);
print_type("Proxy");
js_out("\n target: ");
print_value(&proxy_object.target(), seen_objects);
js_out("\n handler: ");
print_value(&proxy_object.handler(), seen_objects);
}
static void print_map(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& map = static_cast<JS::Map const&>(object);
print_type("Map");
js_out(" {{");
bool first = true;
for (auto& entry : map) {
print_separator(first);
print_value(entry.key, seen_objects);
js_out(" => ");
print_value(entry.value, seen_objects);
}
if (!first)
js_out(" ");
js_out("}}");
}
static void print_set(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& set = static_cast<JS::Set const&>(object);
print_type("Set");
js_out(" {{");
bool first = true;
for (auto& entry : set) {
print_separator(first);
print_value(entry.key, seen_objects);
}
if (!first)
js_out(" ");
js_out("}}");
}
static void print_promise(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& promise = static_cast<JS::Promise const&>(object);
print_type("Promise");
switch (promise.state()) {
case JS::Promise::State::Pending:
js_out("\n state: ");
js_out("\033[36;1mPending\033[0m");
break;
case JS::Promise::State::Fulfilled:
js_out("\n state: ");
js_out("\033[32;1mFulfilled\033[0m");
js_out("\n result: ");
print_value(promise.result(), seen_objects);
break;
case JS::Promise::State::Rejected:
js_out("\n state: ");
js_out("\033[31;1mRejected\033[0m");
js_out("\n result: ");
print_value(promise.result(), seen_objects);
break;
default:
VERIFY_NOT_REACHED();
}
}
static void print_array_buffer(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& array_buffer = static_cast<JS::ArrayBuffer const&>(object);
auto& buffer = array_buffer.buffer();
auto byte_length = array_buffer.byte_length();
print_type("ArrayBuffer");
js_out("\n byteLength: ");
print_value(JS::Value((double)byte_length), seen_objects);
if (array_buffer.is_resizable_array_buffer()) {
js_out("\n maxByteLength: ");
print_value(JS::Value((double)array_buffer.max_byte_length()), seen_objects);
}
if (!byte_length)
return;
js_outln();
for (size_t i = 0; i < byte_length; ++i) {
js_out("{:02x}", buffer[i]);
if (i + 1 < byte_length) {
if ((i + 1) % 32 == 0)
js_outln();
else if ((i + 1) % 16 == 0)
js_out(" ");
else
js_out(" ");
}
}
}
static void print_shadow_realm(JS::Object const&, HashTable<JS::Object*>&)
{
// Not much we can show here that would be useful. Realm pointer address?!
print_type("ShadowRealm");
}
template<typename T>
static void print_number(T number) requires IsArithmetic<T>
{
js_out("\033[35;1m");
js_out("{}", number);
js_out("\033[0m");
}
static void print_typed_array(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& typed_array_base = static_cast<JS::TypedArrayBase const&>(object);
auto& array_buffer = *typed_array_base.viewed_array_buffer();
auto length = typed_array_base.array_length();
print_type(object.class_name());
js_out("\n length: ");
print_value(JS::Value(length), seen_objects);
js_out("\n byteLength: ");
print_value(JS::Value(typed_array_base.byte_length()), seen_objects);
js_out("\n buffer: ");
print_type("ArrayBuffer");
if (array_buffer.is_detached())
js_out(" (detached)");
js_out(" @ {:p}", &array_buffer);
if (!length || array_buffer.is_detached())
return;
js_outln();
// FIXME: This kinda sucks.
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
if (is<JS::ClassName>(object)) { \
js_out("[ "); \
auto& typed_array = static_cast<JS::ClassName const&>(typed_array_base); \
auto data = typed_array.data(); \
for (size_t i = 0; i < length; ++i) { \
if (i > 0) \
js_out(", "); \
print_number(data[i]); \
} \
js_out(" ]"); \
return; \
}
JS_ENUMERATE_TYPED_ARRAYS
#undef __JS_ENUMERATE
VERIFY_NOT_REACHED();
}
static void print_data_view(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& data_view = static_cast<JS::DataView const&>(object);
print_type("DataView");
js_out("\n byteLength: ");
print_value(JS::Value(data_view.byte_length()), seen_objects);
js_out("\n byteOffset: ");
print_value(JS::Value(data_view.byte_offset()), seen_objects);
js_out("\n buffer: ");
print_type("ArrayBuffer");
js_out(" @ {:p}", data_view.viewed_array_buffer());
}
static void print_temporal_calendar(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& calendar = static_cast<JS::Temporal::Calendar const&>(object);
print_type("Temporal.Calendar");
js_out(" ");
print_value(JS::js_string(object.vm(), calendar.identifier()), seen_objects);
}
static void print_temporal_duration(JS::Object const& object, HashTable<JS::Object*>&)
{
auto& duration = static_cast<JS::Temporal::Duration const&>(object);
print_type("Temporal.Duration");
js_out(" \033[34;1m{} y, {} M, {} w, {} d, {} h, {} m, {} s, {} ms, {} us, {} ns\033[0m", duration.years(), duration.months(), duration.weeks(), duration.days(), duration.hours(), duration.minutes(), duration.seconds(), duration.milliseconds(), duration.microseconds(), duration.nanoseconds());
}
static void print_temporal_instant(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& instant = static_cast<JS::Temporal::Instant const&>(object);
print_type("Temporal.Instant");
js_out(" ");
// FIXME: Print human readable date and time, like in print_date() - ideally handling arbitrarily large values since we get a bigint.
print_value(&instant.nanoseconds(), seen_objects);
}
static void print_temporal_plain_date(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& plain_date = static_cast<JS::Temporal::PlainDate const&>(object);
print_type("Temporal.PlainDate");
js_out(" \033[34;1m{:04}-{:02}-{:02}\033[0m", plain_date.iso_year(), plain_date.iso_month(), plain_date.iso_day());
js_out("\n calendar: ");
print_value(&plain_date.calendar(), seen_objects);
}
static void print_temporal_plain_date_time(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& plain_date_time = static_cast<JS::Temporal::PlainDateTime const&>(object);
print_type("Temporal.PlainDateTime");
js_out(" \033[34;1m{:04}-{:02}-{:02} {:02}:{:02}:{:02}.{:03}{:03}{:03}\033[0m", plain_date_time.iso_year(), plain_date_time.iso_month(), plain_date_time.iso_day(), plain_date_time.iso_hour(), plain_date_time.iso_minute(), plain_date_time.iso_second(), plain_date_time.iso_millisecond(), plain_date_time.iso_microsecond(), plain_date_time.iso_nanosecond());
js_out("\n calendar: ");
print_value(&plain_date_time.calendar(), seen_objects);
}
static void print_temporal_plain_month_day(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& plain_month_day = static_cast<JS::Temporal::PlainMonthDay const&>(object);
print_type("Temporal.PlainMonthDay");
// Also has an [[ISOYear]] internal slot, but showing that here seems rather unexpected.
js_out(" \033[34;1m{:02}-{:02}\033[0m", plain_month_day.iso_month(), plain_month_day.iso_day());
js_out("\n calendar: ");
print_value(&plain_month_day.calendar(), seen_objects);
}
static void print_temporal_plain_time(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& plain_time = static_cast<JS::Temporal::PlainTime const&>(object);
print_type("Temporal.PlainTime");
js_out(" \033[34;1m{:02}:{:02}:{:02}.{:03}{:03}{:03}\033[0m", plain_time.iso_hour(), plain_time.iso_minute(), plain_time.iso_second(), plain_time.iso_millisecond(), plain_time.iso_microsecond(), plain_time.iso_nanosecond());
js_out("\n calendar: ");
print_value(&plain_time.calendar(), seen_objects);
}
static void print_temporal_plain_year_month(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& plain_year_month = static_cast<JS::Temporal::PlainYearMonth const&>(object);
print_type("Temporal.PlainYearMonth");
// Also has an [[ISODay]] internal slot, but showing that here seems rather unexpected.
js_out(" \033[34;1m{:04}-{:02}\033[0m", plain_year_month.iso_year(), plain_year_month.iso_month());
js_out("\n calendar: ");
print_value(&plain_year_month.calendar(), seen_objects);
}
static void print_temporal_time_zone(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& time_zone = static_cast<JS::Temporal::TimeZone const&>(object);
print_type("Temporal.TimeZone");
js_out(" ");
print_value(JS::js_string(object.vm(), time_zone.identifier()), seen_objects);
if (time_zone.offset_nanoseconds().has_value()) {
js_out("\n offset (ns): ");
print_value(JS::Value(*time_zone.offset_nanoseconds()), seen_objects);
}
}
static void print_temporal_zoned_date_time(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& zoned_date_time = static_cast<JS::Temporal::ZonedDateTime const&>(object);
print_type("Temporal.ZonedDateTime");
js_out("\n epochNanoseconds: ");
print_value(&zoned_date_time.nanoseconds(), seen_objects);
js_out("\n timeZone: ");
print_value(&zoned_date_time.time_zone(), seen_objects);
js_out("\n calendar: ");
print_value(&zoned_date_time.calendar(), seen_objects);
}
static void print_intl_display_names(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& display_names = static_cast<JS::Intl::DisplayNames const&>(object);
print_type("Intl.DisplayNames");
js_out("\n locale: ");
print_value(js_string(object.vm(), display_names.locale()), seen_objects);
js_out("\n type: ");
print_value(js_string(object.vm(), display_names.type_string()), seen_objects);
js_out("\n style: ");
print_value(js_string(object.vm(), display_names.style_string()), seen_objects);
js_out("\n fallback: ");
print_value(js_string(object.vm(), display_names.fallback_string()), seen_objects);
if (display_names.has_language_display()) {
js_out("\n languageDisplay: ");
print_value(js_string(object.vm(), display_names.language_display_string()), seen_objects);
}
}
static void print_intl_locale(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& locale = static_cast<JS::Intl::Locale const&>(object);
print_type("Intl.Locale");
js_out("\n locale: ");
print_value(js_string(object.vm(), locale.locale()), seen_objects);
if (locale.has_calendar()) {
js_out("\n calendar: ");
print_value(js_string(object.vm(), locale.calendar()), seen_objects);
}
if (locale.has_case_first()) {
js_out("\n caseFirst: ");
print_value(js_string(object.vm(), locale.case_first()), seen_objects);
}
if (locale.has_collation()) {
js_out("\n collation: ");
print_value(js_string(object.vm(), locale.collation()), seen_objects);
}
if (locale.has_hour_cycle()) {
js_out("\n hourCycle: ");
print_value(js_string(object.vm(), locale.hour_cycle()), seen_objects);
}
if (locale.has_numbering_system()) {
js_out("\n numberingSystem: ");
print_value(js_string(object.vm(), locale.numbering_system()), seen_objects);
}
js_out("\n numeric: ");
print_value(JS::Value(locale.numeric()), seen_objects);
}
static void print_intl_list_format(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& list_format = static_cast<JS::Intl::ListFormat const&>(object);
print_type("Intl.ListFormat");
js_out("\n locale: ");
print_value(js_string(object.vm(), list_format.locale()), seen_objects);
js_out("\n type: ");
print_value(js_string(object.vm(), list_format.type_string()), seen_objects);
js_out("\n style: ");
print_value(js_string(object.vm(), list_format.style_string()), seen_objects);
}
static void print_intl_number_format(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& number_format = static_cast<JS::Intl::NumberFormat const&>(object);
print_type("Intl.NumberFormat");
js_out("\n locale: ");
print_value(js_string(object.vm(), number_format.locale()), seen_objects);
js_out("\n dataLocale: ");
print_value(js_string(object.vm(), number_format.data_locale()), seen_objects);
js_out("\n numberingSystem: ");
print_value(js_string(object.vm(), number_format.numbering_system()), seen_objects);
js_out("\n style: ");
print_value(js_string(object.vm(), number_format.style_string()), seen_objects);
if (number_format.has_currency()) {
js_out("\n currency: ");
print_value(js_string(object.vm(), number_format.currency()), seen_objects);
}
if (number_format.has_currency_display()) {
js_out("\n currencyDisplay: ");
print_value(js_string(object.vm(), number_format.currency_display_string()), seen_objects);
}
if (number_format.has_currency_sign()) {
js_out("\n currencySign: ");
print_value(js_string(object.vm(), number_format.currency_sign_string()), seen_objects);
}
if (number_format.has_unit()) {
js_out("\n unit: ");
print_value(js_string(object.vm(), number_format.unit()), seen_objects);
}
if (number_format.has_unit_display()) {
js_out("\n unitDisplay: ");
print_value(js_string(object.vm(), number_format.unit_display_string()), seen_objects);
}
js_out("\n minimumIntegerDigits: ");
print_value(JS::Value(number_format.min_integer_digits()), seen_objects);
if (number_format.has_min_fraction_digits()) {
js_out("\n minimumFractionDigits: ");
print_value(JS::Value(number_format.min_fraction_digits()), seen_objects);
}
if (number_format.has_max_fraction_digits()) {
js_out("\n maximumFractionDigits: ");
print_value(JS::Value(number_format.max_fraction_digits()), seen_objects);
}
if (number_format.has_min_significant_digits()) {
js_out("\n minimumSignificantDigits: ");
print_value(JS::Value(number_format.min_significant_digits()), seen_objects);
}
if (number_format.has_max_significant_digits()) {
js_out("\n maximumSignificantDigits: ");
print_value(JS::Value(number_format.max_significant_digits()), seen_objects);
}
js_out("\n useGrouping: ");
print_value(JS::Value(number_format.use_grouping()), seen_objects);
js_out("\n roundingType: ");
print_value(js_string(object.vm(), number_format.rounding_type_string()), seen_objects);
js_out("\n notation: ");
print_value(js_string(object.vm(), number_format.notation_string()), seen_objects);
if (number_format.has_compact_display()) {
js_out("\n compactDisplay: ");
print_value(js_string(object.vm(), number_format.compact_display_string()), seen_objects);
}
js_out("\n signDisplay: ");
print_value(js_string(object.vm(), number_format.sign_display_string()), seen_objects);
}
static void print_intl_date_time_format(JS::Object& object, HashTable<JS::Object*>& seen_objects)
{
auto& date_time_format = static_cast<JS::Intl::DateTimeFormat&>(object);
print_type("Intl.DateTimeFormat");
js_out("\n locale: ");
print_value(js_string(object.vm(), date_time_format.locale()), seen_objects);
js_out("\n pattern: ");
print_value(js_string(object.vm(), date_time_format.pattern()), seen_objects);
js_out("\n calendar: ");
print_value(js_string(object.vm(), date_time_format.calendar()), seen_objects);
js_out("\n numberingSystem: ");
print_value(js_string(object.vm(), date_time_format.numbering_system()), seen_objects);
if (date_time_format.has_hour_cycle()) {
js_out("\n hourCycle: ");
print_value(js_string(object.vm(), date_time_format.hour_cycle_string()), seen_objects);
}
js_out("\n timeZone: ");
print_value(js_string(object.vm(), date_time_format.time_zone()), seen_objects);
if (date_time_format.has_date_style()) {
js_out("\n dateStyle: ");
print_value(js_string(object.vm(), date_time_format.date_style_string()), seen_objects);
}
if (date_time_format.has_time_style()) {
js_out("\n timeStyle: ");
print_value(js_string(object.vm(), date_time_format.time_style_string()), seen_objects);
}
JS::Intl::for_each_calendar_field(date_time_format.global_object(), date_time_format, [&](auto& option, auto const& property, auto const&) -> JS::ThrowCompletionOr<void> {
using ValueType = typename RemoveReference<decltype(option)>::ValueType;
if (!option.has_value())
return {};
js_out("\n {}: ", property);
if constexpr (IsIntegral<ValueType>) {
print_value(JS::Value(*option), seen_objects);
} else {
auto name = Unicode::calendar_pattern_style_to_string(*option);
print_value(js_string(object.vm(), name), seen_objects);
}
return {};
});
}
static void print_intl_relative_time_format(JS::Object& object, HashTable<JS::Object*>& seen_objects)
{
auto& date_time_format = static_cast<JS::Intl::RelativeTimeFormat&>(object);
print_type("Intl.RelativeTimeFormat");
js_out("\n locale: ");
print_value(js_string(object.vm(), date_time_format.locale()), seen_objects);
js_out("\n numberingSystem: ");
print_value(js_string(object.vm(), date_time_format.numbering_system()), seen_objects);
js_out("\n style: ");
print_value(js_string(object.vm(), date_time_format.style_string()), seen_objects);
js_out("\n numeric: ");
print_value(js_string(object.vm(), date_time_format.numeric_string()), seen_objects);
}
static void print_intl_plural_rules(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& plural_rules = static_cast<JS::Intl::PluralRules const&>(object);
print_type("Intl.PluralRules");
js_out("\n locale: ");
print_value(js_string(object.vm(), plural_rules.locale()), seen_objects);
js_out("\n type: ");
print_value(js_string(object.vm(), plural_rules.type_string()), seen_objects);
js_out("\n minimumIntegerDigits: ");
print_value(JS::Value(plural_rules.min_integer_digits()), seen_objects);
if (plural_rules.has_min_fraction_digits()) {
js_out("\n minimumFractionDigits: ");
print_value(JS::Value(plural_rules.min_fraction_digits()), seen_objects);
}
if (plural_rules.has_max_fraction_digits()) {
js_out("\n maximumFractionDigits: ");
print_value(JS::Value(plural_rules.max_fraction_digits()), seen_objects);
}
if (plural_rules.has_min_significant_digits()) {
js_out("\n minimumSignificantDigits: ");
print_value(JS::Value(plural_rules.min_significant_digits()), seen_objects);
}
if (plural_rules.has_max_significant_digits()) {
js_out("\n maximumSignificantDigits: ");
print_value(JS::Value(plural_rules.max_significant_digits()), seen_objects);
}
js_out("\n roundingType: ");
print_value(js_string(object.vm(), plural_rules.rounding_type_string()), seen_objects);
}
static void print_intl_collator(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& collator = static_cast<JS::Intl::Collator const&>(object);
print_type("Intl.Collator");
out("\n locale: ");
print_value(js_string(object.vm(), collator.locale()), seen_objects);
out("\n usage: ");
print_value(js_string(object.vm(), collator.usage_string()), seen_objects);
out("\n sensitivity: ");
print_value(js_string(object.vm(), collator.sensitivity_string()), seen_objects);
out("\n caseFirst: ");
print_value(js_string(object.vm(), collator.case_first_string()), seen_objects);
out("\n collation: ");
print_value(js_string(object.vm(), collator.collation()), seen_objects);
out("\n ignorePunctuation: ");
print_value(JS::Value(collator.ignore_punctuation()), seen_objects);
out("\n numeric: ");
print_value(JS::Value(collator.numeric()), seen_objects);
}
static void print_intl_segmenter(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& segmenter = static_cast<JS::Intl::Segmenter const&>(object);
print_type("Intl.Segmenter");
out("\n locale: ");
print_value(js_string(object.vm(), segmenter.locale()), seen_objects);
out("\n granularity: ");
print_value(js_string(object.vm(), segmenter.segmenter_granularity_string()), seen_objects);
}
static void print_intl_segments(JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
auto& segments = static_cast<JS::Intl::Segments const&>(object);
print_type("Segments");
out("\n string: ");
print_value(js_string(object.vm(), segments.segments_string()), seen_objects);
out("\n segmenter: ");
print_value(&segments.segments_segmenter(), seen_objects);
}
static void print_primitive_wrapper_object(FlyString const& name, JS::Object const& object, HashTable<JS::Object*>& seen_objects)
{
// BooleanObject, NumberObject, StringObject
print_type(name);
js_out(" ");
print_value(&object, seen_objects);
}
static void print_value(JS::Value value, HashTable<JS::Object*>& seen_objects)
{
if (value.is_empty()) {
js_out("\033[34;1m<empty>\033[0m");
return;
}
if (value.is_object()) {
if (seen_objects.contains(&value.as_object())) {
// FIXME: Maybe we should only do this for circular references,
// not for all reoccurring objects.
js_out("<already printed Object {}>", &value.as_object());
return;
}
seen_objects.set(&value.as_object());
}
if (value.is_object()) {
auto& object = value.as_object();
if (is<JS::Array>(object))
return print_array(static_cast<JS::Array&>(object), seen_objects);
if (object.is_function())
return print_function(object, seen_objects);
if (is<JS::Date>(object))
return print_date(object, seen_objects);
if (is<JS::Error>(object))
return print_error(object, seen_objects);
auto prototype_or_error = object.internal_get_prototype_of();
if (prototype_or_error.has_value() && prototype_or_error.value() == object.global_object().error_prototype())
return print_error(object, seen_objects);
if (is<JS::RegExpObject>(object))
return print_regexp_object(object, seen_objects);
if (is<JS::Map>(object))
return print_map(object, seen_objects);
if (is<JS::Set>(object))
return print_set(object, seen_objects);
if (is<JS::DataView>(object))
return print_data_view(object, seen_objects);
if (is<JS::ProxyObject>(object))
return print_proxy_object(object, seen_objects);
if (is<JS::Promise>(object))
return print_promise(object, seen_objects);
if (is<JS::ArrayBuffer>(object))
return print_array_buffer(object, seen_objects);
if (is<JS::ShadowRealm>(object))
return print_shadow_realm(object, seen_objects);
if (object.is_typed_array())
return print_typed_array(object, seen_objects);
if (is<JS::StringObject>(object))
return print_primitive_wrapper_object("String", object, seen_objects);
if (is<JS::NumberObject>(object))
return print_primitive_wrapper_object("Number", object, seen_objects);
if (is<JS::BooleanObject>(object))
return print_primitive_wrapper_object("Boolean", object, seen_objects);
if (is<JS::Temporal::Calendar>(object))
return print_temporal_calendar(object, seen_objects);
if (is<JS::Temporal::Duration>(object))
return print_temporal_duration(object, seen_objects);
if (is<JS::Temporal::Instant>(object))
return print_temporal_instant(object, seen_objects);
if (is<JS::Temporal::PlainDate>(object))
return print_temporal_plain_date(object, seen_objects);
if (is<JS::Temporal::PlainDateTime>(object))
return print_temporal_plain_date_time(object, seen_objects);
if (is<JS::Temporal::PlainMonthDay>(object))
return print_temporal_plain_month_day(object, seen_objects);
if (is<JS::Temporal::PlainTime>(object))
return print_temporal_plain_time(object, seen_objects);
if (is<JS::Temporal::PlainYearMonth>(object))
return print_temporal_plain_year_month(object, seen_objects);
if (is<JS::Temporal::TimeZone>(object))
return print_temporal_time_zone(object, seen_objects);
if (is<JS::Temporal::ZonedDateTime>(object))
return print_temporal_zoned_date_time(object, seen_objects);
if (is<JS::Intl::DisplayNames>(object))
return print_intl_display_names(object, seen_objects);
if (is<JS::Intl::Locale>(object))
return print_intl_locale(object, seen_objects);
if (is<JS::Intl::ListFormat>(object))
return print_intl_list_format(object, seen_objects);
if (is<JS::Intl::NumberFormat>(object))
return print_intl_number_format(object, seen_objects);
if (is<JS::Intl::DateTimeFormat>(object))
return print_intl_date_time_format(object, seen_objects);
if (is<JS::Intl::RelativeTimeFormat>(object))
return print_intl_relative_time_format(object, seen_objects);
if (is<JS::Intl::PluralRules>(object))
return print_intl_plural_rules(object, seen_objects);
if (is<JS::Intl::Collator>(object))
return print_intl_collator(object, seen_objects);
if (is<JS::Intl::Segmenter>(object))
return print_intl_segmenter(object, seen_objects);
if (is<JS::Intl::Segments>(object))
return print_intl_segments(object, seen_objects);
return print_object(object, seen_objects);
}
if (value.is_string())
js_out("\033[32;1m");
else if (value.is_number() || value.is_bigint())
js_out("\033[35;1m");
else if (value.is_boolean())
js_out("\033[33;1m");
else if (value.is_null())
js_out("\033[33;1m");
else if (value.is_undefined())
js_out("\033[34;1m");
if (value.is_string())
js_out("\"");
else if (value.is_negative_zero())
js_out("-");
js_out("{}", value.to_string_without_side_effects());
if (value.is_string())
js_out("\"");
js_out("\033[0m");
}
static void print(JS::Value value)
{
HashTable<JS::Object*> seen_objects;
print_value(value, seen_objects);
js_outln();
}
static bool write_to_file(String const& path)
{
int fd = open(path.characters(), O_WRONLY | O_CREAT | O_TRUNC, 0666);
for (size_t i = 0; i < repl_statements.size(); i++) {
auto line = repl_statements[i];
if (line.length() && i != repl_statements.size() - 1) {
ssize_t nwritten = write(fd, line.characters(), line.length());
if (nwritten < 0) {
close(fd);
return false;
}
}
if (i != repl_statements.size() - 1) {
char ch = '\n';
ssize_t nwritten = write(fd, &ch, 1);
if (nwritten != 1) {
perror("write");
close(fd);
return false;
}
}
}
close(fd);
return true;
}
static bool parse_and_run(JS::Interpreter& interpreter, StringView source, StringView source_name)
{
enum class ReturnEarly {
No,
Yes,
};
JS::ThrowCompletionOr<JS::Value> result { JS::js_undefined() };
auto run_script_or_module = [&](auto& script_or_module) {
if (s_dump_ast)
script_or_module->parse_node().dump(0);
if (JS::Bytecode::g_dump_bytecode || s_run_bytecode) {
auto executable_result = JS::Bytecode::Generator::generate(script_or_module->parse_node());
if (executable_result.is_error()) {
result = vm->throw_completion<JS::InternalError>(interpreter.global_object(), executable_result.error().to_string());
return ReturnEarly::No;
}
auto executable = executable_result.release_value();
executable->name = source_name;
if (s_opt_bytecode) {
auto& passes = JS::Bytecode::Interpreter::optimization_pipeline();
passes.perform(*executable);
dbgln("Optimisation passes took {}us", passes.elapsed());
}
if (JS::Bytecode::g_dump_bytecode)
executable->dump();
if (s_run_bytecode) {
JS::Bytecode::Interpreter bytecode_interpreter(interpreter.global_object(), interpreter.realm());
result = bytecode_interpreter.run(*executable);
} else {
return ReturnEarly::Yes;
}
} else {
result = interpreter.run(*script_or_module);
}
return ReturnEarly::No;
};
if (!s_as_module) {
auto script_or_error = JS::Script::parse(source, interpreter.realm(), source_name);
if (script_or_error.is_error()) {
auto error = script_or_error.error()[0];
auto hint = error.source_location_hint(source);
if (!hint.is_empty())
outln("{}", hint);
outln(error.to_string());
result = JS::SyntaxError::create(interpreter.global_object(), error.to_string());
} else {
auto return_early = run_script_or_module(script_or_error.value());
if (return_early == ReturnEarly::Yes)
return true;
}
} else {
auto module_or_error = JS::SourceTextModule::parse(source, interpreter.realm(), source_name);
if (module_or_error.is_error()) {
auto error = module_or_error.error()[0];
auto hint = error.source_location_hint(source);
if (!hint.is_empty())
outln("{}", hint);
outln(error.to_string());
result = JS::SyntaxError::create(interpreter.global_object(), error.to_string());
} else {
auto return_early = run_script_or_module(module_or_error.value());
if (return_early == ReturnEarly::Yes)
return true;
}
}
auto handle_exception = [&](JS::Value thrown_value) {
js_out("Uncaught exception: ");
print(thrown_value);
if (!thrown_value.is_object() || !is<JS::Error>(thrown_value.as_object()))
return;
auto& traceback = static_cast<JS::Error const&>(thrown_value.as_object()).traceback();
if (traceback.size() > 1) {
unsigned repetitions = 0;
for (size_t i = 0; i < traceback.size(); ++i) {
auto& traceback_frame = traceback[i];
if (i + 1 < traceback.size()) {
auto& next_traceback_frame = traceback[i + 1];
if (next_traceback_frame.function_name == traceback_frame.function_name) {
repetitions++;
continue;
}
}
if (repetitions > 4) {
// If more than 5 (1 + >4) consecutive function calls with the same name, print
// the name only once and show the number of repetitions instead. This prevents
// printing ridiculously large call stacks of recursive functions.
js_outln(" -> {}", traceback_frame.function_name);
js_outln(" {} more calls", repetitions);
} else {
for (size_t j = 0; j < repetitions + 1; ++j)
js_outln(" -> {}", traceback_frame.function_name);
}
repetitions = 0;
}
}
};
if (!result.is_error())
last_value = JS::make_handle(result.value());
if (result.is_error()) {
VERIFY(result.throw_completion().value().has_value());
handle_exception(*result.release_error().value());
return false;
} else if (s_print_last_result) {
print(result.value());
}
return true;
}
static JS::ThrowCompletionOr<JS::Value> load_file_impl(JS::VM& vm, JS::GlobalObject& global_object)
{
auto filename = TRY(vm.argument(0).to_string(global_object));
auto file = Core::File::construct(filename);
if (!file->open(Core::OpenMode::ReadOnly))
return vm.throw_completion<JS::Error>(global_object, String::formatted("Failed to open '{}': {}", filename, file->error_string()));
auto file_contents = file->read_all();
auto source = StringView { file_contents };
auto script_or_error = JS::Script::parse(source, vm.interpreter().realm(), filename);
if (script_or_error.is_error()) {
auto& error = script_or_error.error()[0];
return vm.throw_completion<JS::SyntaxError>(global_object, error.to_string());
}
// FIXME: Use eval()-like semantics and execute in current scope?
TRY(vm.interpreter().run(script_or_error.value()));
return JS::js_undefined();
}
static JS::ThrowCompletionOr<JS::Value> load_json_impl(JS::VM& vm, JS::GlobalObject& global_object)
{
auto filename = TRY(vm.argument(0).to_string(global_object));
auto file = Core::File::construct(filename);
if (!file->open(Core::OpenMode::ReadOnly))
return vm.throw_completion<JS::Error>(global_object, String::formatted("Failed to open '{}': {}", filename, file->error_string()));
auto file_contents = file->read_all();
auto json = JsonValue::from_string(file_contents);
if (json.is_error())
return vm.throw_completion<JS::SyntaxError>(global_object, JS::ErrorType::JsonMalformed);
return JS::JSONObject::parse_json_value(global_object, json.value());
}
void ReplObject::initialize_global_object()
{
Base::initialize_global_object();
define_direct_property("global", this, JS::Attribute::Enumerable);
u8 attr = JS::Attribute::Configurable | JS::Attribute::Writable | JS::Attribute::Enumerable;
define_native_function("exit", exit_interpreter, 0, attr);
define_native_function("help", repl_help, 0, attr);
define_native_function("load", load_file, 1, attr);
define_native_function("save", save_to_file, 1, attr);
define_native_function("loadJSON", load_json, 1, attr);
define_native_function("print", print, 1, attr);
define_native_accessor(
"_",
[](JS::VM&, JS::GlobalObject&) {
return last_value.value();
},
[](JS::VM& vm, JS::GlobalObject& global_object) -> JS::ThrowCompletionOr<JS::Value> {
VERIFY(is<ReplObject>(global_object));
outln("Disable writing last value to '_'");
// We must delete first otherwise this setter gets called recursively.
TRY(global_object.internal_delete(JS::PropertyKey { "_" }));
auto value = vm.argument(0);
TRY(global_object.internal_set(JS::PropertyKey { "_" }, value, &global_object));
return value;
},
attr);
}
JS_DEFINE_NATIVE_FUNCTION(ReplObject::save_to_file)
{
if (!vm.argument_count())
return JS::Value(false);
String save_path = vm.argument(0).to_string_without_side_effects();
StringView path = StringView(save_path.characters());
if (write_to_file(path)) {
return JS::Value(true);
}
return JS::Value(false);
}
JS_DEFINE_NATIVE_FUNCTION(ReplObject::exit_interpreter)
{
if (!vm.argument_count())
exit(0);
exit(TRY(vm.argument(0).to_number(global_object)).as_double());
}
JS_DEFINE_NATIVE_FUNCTION(ReplObject::repl_help)
{
js_outln("REPL commands:");
js_outln(" exit(code): exit the REPL with specified code. Defaults to 0.");
js_outln(" help(): display this menu");
js_outln(" load(file): load given JS file into running session. For example: load(\"foo.js\")");
js_outln(" save(file): write REPL input history to the given file. For example: save(\"foo.txt\")");
return JS::js_undefined();
}
JS_DEFINE_NATIVE_FUNCTION(ReplObject::load_file)
{
return load_file_impl(vm, global_object);
}
JS_DEFINE_NATIVE_FUNCTION(ReplObject::load_json)
{
return load_json_impl(vm, global_object);
}
JS_DEFINE_NATIVE_FUNCTION(ReplObject::print)
{
::print(vm.argument(0));
return JS::js_undefined();
}
void ScriptObject::initialize_global_object()
{
Base::initialize_global_object();
define_direct_property("global", this, JS::Attribute::Enumerable);
u8 attr = JS::Attribute::Configurable | JS::Attribute::Writable | JS::Attribute::Enumerable;
define_native_function("load", load_file, 1, attr);
define_native_function("loadJSON", load_json, 1, attr);
define_native_function("print", print, 1, attr);
}
JS_DEFINE_NATIVE_FUNCTION(ScriptObject::load_file)
{
return load_file_impl(vm, global_object);
}
JS_DEFINE_NATIVE_FUNCTION(ScriptObject::load_json)
{
return load_json_impl(vm, global_object);
}
JS_DEFINE_NATIVE_FUNCTION(ScriptObject::print)
{
::print(vm.argument(0));
return JS::js_undefined();
}
static void repl(JS::Interpreter& interpreter)
{
while (!s_fail_repl) {
String piece = read_next_piece();
if (Utf8View { piece }.trim(JS::whitespace_characters).is_empty())
continue;
repl_statements.append(piece);
parse_and_run(interpreter, piece, "REPL");
}
}
static Function<void()> interrupt_interpreter;
static void sigint_handler()
{
interrupt_interpreter();
}
class ReplConsoleClient final : public JS::ConsoleClient {
public:
ReplConsoleClient(JS::Console& console)
: ConsoleClient(console)
{
}
virtual void clear() override
{
js_out("\033[3J\033[H\033[2J");
m_group_stack_depth = 0;
fflush(stdout);
}
virtual void end_group() override
{
if (m_group_stack_depth > 0)
m_group_stack_depth--;
}
// 2.3. Printer(logLevel, args[, options]), https://console.spec.whatwg.org/#printer
virtual JS::ThrowCompletionOr<JS::Value> printer(JS::Console::LogLevel log_level, PrinterArguments arguments) override
{
String indent = String::repeated(" ", m_group_stack_depth);
if (log_level == JS::Console::LogLevel::Trace) {
auto trace = arguments.get<JS::Console::Trace>();
StringBuilder builder;
if (!trace.label.is_empty())
builder.appendff("{}\033[36;1m{}\033[0m\n", indent, trace.label);
for (auto& function_name : trace.stack)
builder.appendff("{}-> {}\n", indent, function_name);
js_outln("{}", builder.string_view());
return JS::js_undefined();
}
if (log_level == JS::Console::LogLevel::Group || log_level == JS::Console::LogLevel::GroupCollapsed) {
auto group = arguments.get<JS::Console::Group>();
js_outln("{}\033[36;1m{}\033[0m", indent, group.label);
m_group_stack_depth++;
return JS::js_undefined();
}
auto output = String::join(" ", arguments.get<Vector<JS::Value>>());
m_console.output_debug_message(log_level, output);
switch (log_level) {
case JS::Console::LogLevel::Debug:
js_outln("{}\033[36;1m{}\033[0m", indent, output);
break;
case JS::Console::LogLevel::Error:
case JS::Console::LogLevel::Assert:
js_outln("{}\033[31;1m{}\033[0m", indent, output);
break;
case JS::Console::LogLevel::Info:
js_outln("{}(i) {}", indent, output);
break;
case JS::Console::LogLevel::Log:
js_outln("{}{}", indent, output);
break;
case JS::Console::LogLevel::Warn:
case JS::Console::LogLevel::CountReset:
js_outln("{}\033[33;1m{}\033[0m", indent, output);
break;
default:
js_outln("{}{}", indent, output);
break;
}
return JS::js_undefined();
}
private:
int m_group_stack_depth { 0 };
};
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
#ifdef __serenity__
TRY(Core::System::pledge("stdio rpath wpath cpath tty sigaction"));
#endif
bool gc_on_every_allocation = false;
bool disable_syntax_highlight = false;
StringView evaluate_script;
Vector<StringView> script_paths;
Core::ArgsParser args_parser;
args_parser.set_general_help("This is a JavaScript interpreter.");
args_parser.add_option(s_dump_ast, "Dump the AST", "dump-ast", 'A');
args_parser.add_option(JS::Bytecode::g_dump_bytecode, "Dump the bytecode", "dump-bytecode", 'd');
args_parser.add_option(s_run_bytecode, "Run the bytecode", "run-bytecode", 'b');
args_parser.add_option(s_opt_bytecode, "Optimize the bytecode", "optimize-bytecode", 'p');
args_parser.add_option(s_as_module, "Treat as module", "as-module", 'm');
args_parser.add_option(s_print_last_result, "Print last result", "print-last-result", 'l');
args_parser.add_option(s_strip_ansi, "Disable ANSI colors", "disable-ansi-colors", 'i');
args_parser.add_option(s_disable_source_location_hints, "Disable source location hints", "disable-source-location-hints", 'h');
args_parser.add_option(gc_on_every_allocation, "GC on every allocation", "gc-on-every-allocation", 'g');
args_parser.add_option(disable_syntax_highlight, "Disable live syntax highlighting", "no-syntax-highlight", 's');
args_parser.add_option(evaluate_script, "Evaluate argument as a script", "evaluate", 'c', "script");
args_parser.add_positional_argument(script_paths, "Path to script files", "scripts", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
bool syntax_highlight = !disable_syntax_highlight;
vm = JS::VM::create();
vm->enable_default_host_import_module_dynamically_hook();
// NOTE: These will print out both warnings when using something like Promise.reject().catch(...) -
// which is, as far as I can tell, correct - a promise is created, rejected without handler, and a
// handler then attached to it. The Node.js REPL doesn't warn in this case, so it's something we
// might want to revisit at a later point and disable warnings for promises created this way.
vm->on_promise_unhandled_rejection = [](auto& promise) {
// FIXME: Optionally make print_value() to print to stderr
js_out("WARNING: A promise was rejected without any handlers");
js_out(" (result: ");
HashTable<JS::Object*> seen_objects;
print_value(promise.result(), seen_objects);
js_outln(")");
};
vm->on_promise_rejection_handled = [](auto& promise) {
// FIXME: Optionally make print_value() to print to stderr
js_out("WARNING: A handler was added to an already rejected promise");
js_out(" (result: ");
HashTable<JS::Object*> seen_objects;
print_value(promise.result(), seen_objects);
js_outln(")");
};
OwnPtr<JS::Interpreter> interpreter;
// FIXME: Figure out some way to interrupt the interpreter now that vm.exception() is gone.
if (evaluate_script.is_empty() && script_paths.is_empty()) {
s_print_last_result = true;
interpreter = JS::Interpreter::create<ReplObject>(*vm);
ReplConsoleClient console_client(interpreter->global_object().console());
interpreter->global_object().console().set_client(console_client);
interpreter->heap().set_should_collect_on_every_allocation(gc_on_every_allocation);
auto& global_environment = interpreter->realm().global_environment();
s_editor = Line::Editor::construct();
s_editor->load_history(s_history_path);
signal(SIGINT, [](int) {
if (!s_editor->is_editing())
sigint_handler();
s_editor->save_history(s_history_path);
});
s_editor->on_display_refresh = [syntax_highlight](Line::Editor& editor) {
auto stylize = [&](Line::Span span, Line::Style styles) {
if (syntax_highlight)
editor.stylize(span, styles);
};
editor.strip_styles();
size_t open_indents = s_repl_line_level;
auto line = editor.line();
JS::Lexer lexer(line);
bool indenters_starting_line = true;
for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
auto length = Utf8View { token.value() }.length();
auto start = token.offset();
auto end = start + length;
if (indenters_starting_line) {
if (token.type() != JS::TokenType::ParenClose && token.type() != JS::TokenType::BracketClose && token.type() != JS::TokenType::CurlyClose) {
indenters_starting_line = false;
} else {
--open_indents;
}
}
switch (token.category()) {
case JS::TokenCategory::Invalid:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::Red), Line::Style::Underline });
break;
case JS::TokenCategory::Number:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::Magenta) });
break;
case JS::TokenCategory::String:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::Green), Line::Style::Bold });
break;
case JS::TokenCategory::Punctuation:
break;
case JS::TokenCategory::Operator:
break;
case JS::TokenCategory::Keyword:
switch (token.type()) {
case JS::TokenType::BoolLiteral:
case JS::TokenType::NullLiteral:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow), Line::Style::Bold });
break;
default:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::Blue), Line::Style::Bold });
break;
}
break;
case JS::TokenCategory::ControlKeyword:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::Cyan), Line::Style::Italic });
break;
case JS::TokenCategory::Identifier:
stylize({ start, end, Line::Span::CodepointOriented }, { Line::Style::Foreground(Line::Style::XtermColor::White), Line::Style::Bold });
break;
default:
break;
}
}
editor.set_prompt(prompt_for_level(open_indents));
};
auto complete = [&interpreter, &global_environment](Line::Editor const& editor) -> Vector<Line::CompletionSuggestion> {
auto line = editor.line(editor.cursor());
JS::Lexer lexer { line };
enum {
Initial,
CompleteVariable,
CompleteNullProperty,
CompleteProperty,
} mode { Initial };
StringView variable_name;
StringView property_name;
// we're only going to complete either
// - <N>
// where N is part of the name of a variable
// - <N>.<P>
// where N is the complete name of a variable and
// P is part of the name of one of its properties
auto js_token = lexer.next();
for (; js_token.type() != JS::TokenType::Eof; js_token = lexer.next()) {
switch (mode) {
case CompleteVariable:
switch (js_token.type()) {
case JS::TokenType::Period:
// ...<name> <dot>
mode = CompleteNullProperty;
break;
default:
// not a dot, reset back to initial
mode = Initial;
break;
}
break;
case CompleteNullProperty:
if (js_token.is_identifier_name()) {
// ...<name> <dot> <name>
mode = CompleteProperty;
property_name = js_token.value();
} else {
mode = Initial;
}
break;
case CompleteProperty:
// something came after the property access, reset to initial
case Initial:
if (js_token.type() == JS::TokenType::Identifier) {
// ...<name>...
mode = CompleteVariable;
variable_name = js_token.value();
} else {
mode = Initial;
}
break;
}
}
bool last_token_has_trivia = js_token.trivia().length() > 0;
if (mode == CompleteNullProperty) {
mode = CompleteProperty;
property_name = "";
last_token_has_trivia = false; // <name> <dot> [tab] is sensible to complete.
}
if (mode == Initial || last_token_has_trivia)
return {}; // we do not know how to complete this
Vector<Line::CompletionSuggestion> results;
Function<void(JS::Shape const&, StringView)> list_all_properties = [&results, &list_all_properties](JS::Shape const& shape, auto property_pattern) {
for (auto const& descriptor : shape.property_table()) {
if (!descriptor.key.is_string())
continue;
auto key = descriptor.key.as_string();
if (key.view().starts_with(property_pattern)) {
Line::CompletionSuggestion completion { key, Line::CompletionSuggestion::ForSearch };
if (!results.contains_slow(completion)) { // hide duplicates
results.append(String(key));
results.last().invariant_offset = property_pattern.length();
}
}
}
if (auto const* prototype = shape.prototype()) {
list_all_properties(prototype->shape(), property_pattern);
}
};
switch (mode) {
case CompleteProperty: {
auto reference_or_error = vm->resolve_binding(variable_name, &global_environment);
if (reference_or_error.is_error())
return {};
auto value_or_error = reference_or_error.value().get_value(interpreter->global_object());
if (value_or_error.is_error())
return {};
auto variable = value_or_error.value();
VERIFY(!variable.is_empty());
if (!variable.is_object())
break;
auto const* object = MUST(variable.to_object(interpreter->global_object()));
auto const& shape = object->shape();
list_all_properties(shape, property_name);
break;
}
case CompleteVariable: {
auto const& variable = interpreter->global_object();
list_all_properties(variable.shape(), variable_name);
for (auto const& name : global_environment.declarative_record().bindings()) {
if (name.starts_with(variable_name)) {
results.empend(name);
results.last().invariant_offset = variable_name.length();
}
}
break;
}
default:
VERIFY_NOT_REACHED();
}
return results;
};
s_editor->on_tab_complete = move(complete);
repl(*interpreter);
s_editor->save_history(s_history_path);
} else {
interpreter = JS::Interpreter::create<ScriptObject>(*vm);
ReplConsoleClient console_client(interpreter->global_object().console());
interpreter->global_object().console().set_client(console_client);
interpreter->heap().set_should_collect_on_every_allocation(gc_on_every_allocation);
signal(SIGINT, [](int) {
sigint_handler();
});
StringBuilder builder;
StringView source_name;
if (evaluate_script.is_empty()) {
if (script_paths.size() > 1)
warnln("Warning: Multiple files supplied, this will concatenate the sources and resolve modules as if it was the first file");
for (auto& path : script_paths) {
auto file = TRY(Core::File::open(path, Core::OpenMode::ReadOnly));
auto file_contents = file->read_all();
auto source = StringView { file_contents };
builder.append(source);
}
source_name = script_paths[0];
} else {
builder.append(evaluate_script);
source_name = "eval"sv;
}
// We resolve modules as if it is the first file
if (!parse_and_run(*interpreter, builder.string_view(), source_name))
return 1;
}
return 0;
}
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