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#ifndef SRC_NODE_OPTIONS_H_
#define SRC_NODE_OPTIONS_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include <string>
#include <vector>
#include <unordered_map>
#include <memory>
#include "node_constants.h"
namespace node {
struct HostPort {
std::string host_name;
int port;
void Update(const HostPort& other) {
if (!other.host_name.empty()) host_name = other.host_name;
if (other.port >= 0) port = other.port;
}
};
class Options {
public:
virtual void CheckOptions(std::vector<std::string>* errors) {}
virtual ~Options() {}
};
// These options are currently essentially per-Environment, but it can be nice
// to keep them separate since they are a group of options applying to a very
// specific part of Node. It might also make more sense for them to be
// per-Isolate, rather than per-Environment.
class DebugOptions : public Options {
public:
bool inspector_enabled = false;
bool deprecated_debug = false;
bool break_first_line = false;
bool break_node_first_line = false;
HostPort host_port = {"127.0.0.1", -1};
enum { kDefaultInspectorPort = 9229 };
bool deprecated_invocation() const {
return deprecated_debug &&
inspector_enabled &&
break_first_line;
}
bool invalid_invocation() const {
return deprecated_debug && !inspector_enabled;
}
bool wait_for_connect() const {
return break_first_line || break_node_first_line;
}
const std::string& host() {
return host_port.host_name;
}
int port() {
return host_port.port < 0 ? kDefaultInspectorPort : host_port.port;
}
};
class EnvironmentOptions : public Options {
public:
std::shared_ptr<DebugOptions> debug_options { new DebugOptions() };
bool abort_on_uncaught_exception = false;
bool experimental_modules = false;
bool experimental_repl_await = false;
bool experimental_vm_modules = false;
bool experimental_worker = false;
bool expose_internals = false;
std::string http_parser =
#ifdef NODE_EXPERIMENTAL_HTTP_DEFAULT
"llhttp";
#else
"legacy";
#endif
bool no_deprecation = false;
bool no_force_async_hooks_checks = false;
bool no_warnings = false;
bool pending_deprecation = false;
bool preserve_symlinks = false;
bool preserve_symlinks_main = false;
bool prof_process = false;
std::string redirect_warnings;
bool throw_deprecation = false;
bool trace_deprecation = false;
bool trace_sync_io = false;
bool trace_warnings = false;
std::string userland_loader;
bool syntax_check_only = false;
bool has_eval_string = false;
std::string eval_string;
bool print_eval = false;
bool force_repl = false;
std::vector<std::string> preload_modules;
std::vector<std::string> user_argv;
inline DebugOptions* get_debug_options();
void CheckOptions(std::vector<std::string>* errors);
};
class PerIsolateOptions : public Options {
public:
std::shared_ptr<EnvironmentOptions> per_env { new EnvironmentOptions() };
bool track_heap_objects = false;
inline EnvironmentOptions* get_per_env_options();
void CheckOptions(std::vector<std::string>* errors);
};
class PerProcessOptions : public Options {
public:
std::shared_ptr<PerIsolateOptions> per_isolate { new PerIsolateOptions() };
std::string title;
std::string trace_event_categories;
std::string trace_event_file_pattern = "node_trace.${rotation}.log";
int64_t v8_thread_pool_size = 4;
bool zero_fill_all_buffers = false;
std::vector<std::string> security_reverts;
bool print_bash_completion = false;
bool print_help = false;
bool print_v8_help = false;
bool print_version = false;
#ifdef NODE_HAVE_I18N_SUPPORT
std::string icu_data_dir;
#endif
// TODO(addaleax): Some of these could probably be per-Environment.
#if HAVE_OPENSSL
std::string openssl_config;
std::string tls_cipher_list = DEFAULT_CIPHER_LIST_CORE;
#ifdef NODE_OPENSSL_CERT_STORE
bool ssl_openssl_cert_store = true;
#else
bool ssl_openssl_cert_store = false;
#endif
bool use_openssl_ca = false;
bool use_bundled_ca = false;
#if NODE_FIPS_MODE
bool enable_fips_crypto = false;
bool force_fips_crypto = false;
#endif
#endif
inline PerIsolateOptions* get_per_isolate_options();
void CheckOptions(std::vector<std::string>* errors);
};
// The actual options parser, as opposed to the structs containing them:
namespace options_parser {
HostPort SplitHostPort(const std::string& arg,
std::vector<std::string>* errors);
void GetOptions(const v8::FunctionCallbackInfo<v8::Value>& args);
enum OptionEnvvarSettings {
kAllowedInEnvironment,
kDisallowedInEnvironment
};
enum OptionType {
kNoOp,
kV8Option,
kBoolean,
kInteger,
kString,
kHostPort,
kStringList,
};
template <typename Options>
class OptionsParser {
public:
virtual ~OptionsParser() {}
typedef Options TargetType;
struct NoOp {};
struct V8Option {};
// TODO(addaleax): A lot of the `std::string` usage here could be reduced
// to simple `const char*`s if it's reasonable to expect the values to be
// known at compile-time.
// These methods add a single option to the parser. Optionally, it can be
// specified whether the option should be allowed from environment variable
// sources (i.e. NODE_OPTIONS).
void AddOption(const std::string& name,
const std::string& help_text,
bool Options::* field,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
void AddOption(const std::string& name,
const std::string& help_text,
int64_t Options::* field,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
void AddOption(const std::string& name,
const std::string& help_text,
std::string Options::* field,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
void AddOption(const std::string& name,
const std::string& help_text,
std::vector<std::string> Options::* field,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
void AddOption(const std::string& name,
const std::string& help_text,
HostPort Options::* field,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
void AddOption(const std::string& name,
const std::string& help_text,
NoOp no_op_tag,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
void AddOption(const std::string& name,
const std::string& help_text,
V8Option v8_option_tag,
OptionEnvvarSettings env_setting = kDisallowedInEnvironment);
// Adds aliases. An alias can be of the form "--option-a" -> "--option-b",
// or have a more complex group expansion, like
// "--option-a" -> { "--option-b", "--harmony-foobar", "--eval", "42" }
// If `from` has the form "--option-a=", the alias will only be expanded if
// the option is presented in that form (i.e. with a '=').
// If `from` has the form "--option-a <arg>", the alias will only be expanded
// if the option has a non-option argument (not starting with -) following it.
void AddAlias(const std::string& from, const std::string& to);
void AddAlias(const std::string& from, const std::vector<std::string>& to);
void AddAlias(const std::string& from,
const std::initializer_list<std::string>& to);
// Add implications from some arbitrary option to a boolean one, either
// in a way that makes `from` set `to` to true or to false.
void Implies(const std::string& from, const std::string& to);
void ImpliesNot(const std::string& from, const std::string& to);
// Insert options from another options parser into this one, along with
// a method that yields the target options type from this parser's options
// type.
template <typename ChildOptions>
void Insert(OptionsParser<ChildOptions>* child_options_parser,
ChildOptions* (Options::* get_child)());
// Parse a sequence of options into an options struct, a list of
// arguments that were parsed as options, a list of unknown/JS engine options,
// and leave the remainder in the input `args` vector.
//
// For example, an `args` input of
//
// node --foo --harmony-bar --fizzle=42 -- /path/to/cow moo
//
// expands as
//
// - `args` -> { "node", "/path/to/cow", "moo" }
// - `exec_args` -> { "--foo", "--harmony-bar", "--fizzle=42" }
// - `v8_args` -> `{ "node", "--harmony-bar" }
// - `options->foo == true`, `options->fizzle == 42`.
//
// If `*error` is set, the result of the parsing should be discarded and the
// contents of any of the argument vectors should be considered undefined.
virtual void Parse(std::vector<std::string>* const args,
std::vector<std::string>* const exec_args,
std::vector<std::string>* const v8_args,
Options* const options,
OptionEnvvarSettings required_env_settings,
std::vector<std::string>* const errors);
private:
// We support the wide variety of different option types by remembering
// how to access them, given a certain `Options` struct.
// Represents a field within `Options`.
class BaseOptionField {
public:
virtual ~BaseOptionField() {}
virtual void* LookupImpl(Options* options) const = 0;
};
// Represents a field of type T within `Options`.
template <typename T>
class OptionField : public BaseOptionField {
public:
typedef T Type;
T* Lookup(Options* options) const {
return static_cast<T*>(this->LookupImpl(options));
}
};
// Represents a field of type T within `Options` that can be looked up
// as a C++ member field.
template <typename T>
class SimpleOptionField : public OptionField<T> {
public:
explicit SimpleOptionField(T Options::* field) : field_(field) {}
void* LookupImpl(Options* options) const override {
return static_cast<void*>(&(options->*field_));
}
private:
T Options::* field_;
};
template <typename T>
inline T* Lookup(std::shared_ptr<BaseOptionField> field,
Options* options) const {
return std::static_pointer_cast<OptionField<T>>(field)->Lookup(options);
}
// An option consists of:
// - A type.
// - A way to store/access the property value.
// - The information of whether it may occur in an env var or not.
struct OptionInfo {
OptionType type;
std::shared_ptr<BaseOptionField> field;
OptionEnvvarSettings env_setting;
std::string help_text;
};
// An implied option is composed of the information on where to store a
// specific boolean value (if another specific option is encountered).
struct Implication {
std::shared_ptr<OptionField<bool>> target_field;
bool target_value;
};
// These are helpers that make `Insert()` support properties of other
// options structs, if we know how to access them.
template <typename OriginalField, typename ChildOptions>
static auto Convert(
std::shared_ptr<OriginalField> original,
ChildOptions* (Options::* get_child)());
template <typename ChildOptions>
static auto Convert(
typename OptionsParser<ChildOptions>::OptionInfo original,
ChildOptions* (Options::* get_child)());
template <typename ChildOptions>
static auto Convert(
typename OptionsParser<ChildOptions>::Implication original,
ChildOptions* (Options::* get_child)());
std::unordered_map<std::string, OptionInfo> options_;
std::unordered_map<std::string, std::vector<std::string>> aliases_;
std::unordered_multimap<std::string, Implication> implications_;
template <typename OtherOptions>
friend class OptionsParser;
friend void GetOptions(const v8::FunctionCallbackInfo<v8::Value>& args);
};
class DebugOptionsParser : public OptionsParser<DebugOptions> {
public:
DebugOptionsParser();
static DebugOptionsParser instance;
};
class EnvironmentOptionsParser : public OptionsParser<EnvironmentOptions> {
public:
EnvironmentOptionsParser();
static EnvironmentOptionsParser instance;
};
class PerIsolateOptionsParser : public OptionsParser<PerIsolateOptions> {
public:
PerIsolateOptionsParser();
static PerIsolateOptionsParser instance;
};
class PerProcessOptionsParser : public OptionsParser<PerProcessOptions> {
public:
PerProcessOptionsParser();
static PerProcessOptionsParser instance;
};
} // namespace options_parser
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_NODE_OPTIONS_H_
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