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#[macro_use]
extern crate clap;
extern crate env_logger;
#[macro_use]
extern crate log;
use clap::{App, AppSettings, Arg, ArgMatches};
use rustpython_compiler::compile;
use rustpython_vm::{
exceptions::print_exception,
match_class,
obj::{objint::PyInt, objtype},
pyobject::{BorrowValue, ItemProtocol, PyResult},
scope::Scope,
util, InitParameter, Interpreter, PySettings, VirtualMachine,
};
use std::convert::TryInto;
use std::env;
use std::path::PathBuf;
use std::process;
use std::str::FromStr;
mod shell;
fn main() {
#[cfg(feature = "flame-it")]
let main_guard = flame::start_guard("RustPython main");
env_logger::init();
let app = App::new("RustPython");
let matches = parse_arguments(app);
let settings = create_settings(&matches);
// don't translate newlines (\r\n <=> \n)
#[cfg(windows)]
{
extern "C" {
fn _setmode(fd: i32, flags: i32) -> i32;
}
unsafe {
_setmode(0, libc::O_BINARY);
_setmode(1, libc::O_BINARY);
_setmode(2, libc::O_BINARY);
}
}
// We only include the standard library bytecode in WASI when initializing
let init = if cfg!(target_os = "wasi") {
InitParameter::Internal
} else {
InitParameter::External
};
let interp = Interpreter::new(settings, init);
let exitcode = interp.enter(move |vm| {
let res = run_rustpython(vm, &matches);
#[cfg(feature = "flame-it")]
{
main_guard.end();
if let Err(e) = write_profile(&matches) {
error!("Error writing profile information: {}", e);
}
}
// See if any exception leaked out:
let exitcode = match res {
Ok(()) => 0,
Err(err) if objtype::isinstance(&err, &vm.ctx.exceptions.system_exit) => {
let args = err.args();
match args.borrow_value().len() {
0 => 0,
1 => match_class!(match args.borrow_value()[0].clone() {
i @ PyInt => {
use num_traits::cast::ToPrimitive;
i.borrow_value().to_i32().unwrap_or(0)
}
arg => {
if vm.is_none(&arg) {
0
} else {
if let Ok(s) = vm.to_str(&arg) {
eprintln!("{}", s);
}
1
}
}
}),
_ => {
if let Ok(r) = vm.to_repr(args.as_object()) {
eprintln!("{}", r);
}
1
}
}
}
Err(err) => {
print_exception(&vm, err);
1
}
};
let _ = vm.run_atexit_funcs();
exitcode
});
process::exit(exitcode);
}
fn parse_arguments<'a>(app: App<'a, '_>) -> ArgMatches<'a> {
let app = app
.setting(AppSettings::TrailingVarArg)
.version(crate_version!())
.author(crate_authors!())
.about("Rust implementation of the Python language")
.usage("rustpython [OPTIONS] [-c CMD | -m MODULE | FILE] [PYARGS]...")
.arg(
Arg::with_name("script")
.required(false)
.allow_hyphen_values(true)
.multiple(true)
.value_name("script, args")
.min_values(1),
)
.arg(
Arg::with_name("c")
.short("c")
.takes_value(true)
.allow_hyphen_values(true)
.multiple(true)
.value_name("cmd, args")
.min_values(1)
.help("run the given string as a program"),
)
.arg(
Arg::with_name("m")
.short("m")
.takes_value(true)
.allow_hyphen_values(true)
.multiple(true)
.value_name("module, args")
.min_values(1)
.help("run library module as script"),
)
.arg(
Arg::with_name("optimize")
.short("O")
.multiple(true)
.help("Optimize. Set __debug__ to false. Remove debug statements."),
)
.arg(
Arg::with_name("verbose")
.short("v")
.multiple(true)
.help("Give the verbosity (can be applied multiple times)"),
)
.arg(Arg::with_name("debug").short("d").help("Debug the parser."))
.arg(
Arg::with_name("quiet")
.short("q")
.help("Be quiet at startup."),
)
.arg(
Arg::with_name("inspect")
.short("i")
.help("Inspect interactively after running the script."),
)
.arg(
Arg::with_name("no-user-site")
.short("s")
.help("don't add user site directory to sys.path."),
)
.arg(
Arg::with_name("no-site")
.short("S")
.help("don't imply 'import site' on initialization"),
)
.arg(
Arg::with_name("dont-write-bytecode")
.short("B")
.help("don't write .pyc files on import"),
)
.arg(
Arg::with_name("ignore-environment")
.short("E")
.help("Ignore environment variables PYTHON* such as PYTHONPATH"),
)
.arg(
Arg::with_name("isolate")
.short("I")
.help("isolate Python from the user's environment (implies -E and -s)"),
)
.arg(
Arg::with_name("implementation-option")
.short("X")
.takes_value(true)
.multiple(true)
.help("set implementation-specific option"),
)
.arg(
Arg::with_name("warning-control")
.short("W")
.takes_value(true)
.multiple(true)
.help("warning control; arg is action:message:category:module:lineno"),
)
.arg(
Arg::with_name("bytes-warning")
.short("b")
.multiple(true)
.help("issue warnings about using bytes where strings are usually expected (-bb: issue errors)"),
);
#[cfg(feature = "flame-it")]
let app = app
.arg(
Arg::with_name("profile_output")
.long("profile-output")
.takes_value(true)
.help("the file to output the profiling information to"),
)
.arg(
Arg::with_name("profile_format")
.long("profile-format")
.takes_value(true)
.help("the profile format to output the profiling information in"),
);
app.get_matches()
}
/// Create settings by examining command line arguments and environment
/// variables.
fn create_settings(matches: &ArgMatches) -> PySettings {
let mut settings = PySettings::default();
settings.isolated = matches.is_present("isolate");
settings.ignore_environment = matches.is_present("ignore-environment");
let ignore_environment = settings.ignore_environment || settings.isolated;
settings.interactive = !matches.is_present("c")
&& !matches.is_present("m")
&& (!matches.is_present("script") || matches.is_present("inspect"));
// add the current directory to sys.path
settings.path_list.push("".to_owned());
// BUILDTIME_RUSTPYTHONPATH should be set when distributing
if let Some(paths) = option_env!("BUILDTIME_RUSTPYTHONPATH") {
settings.path_list.extend(
std::env::split_paths(paths).map(|path| path.into_os_string().into_string().unwrap()),
)
} else {
#[cfg(all(feature = "pylib", not(feature = "freeze-stdlib")))]
settings.path_list.push(pylib::LIB_PATH.to_owned());
}
if !ignore_environment {
settings.path_list.extend(get_paths("RUSTPYTHONPATH"));
settings.path_list.extend(get_paths("PYTHONPATH"));
}
// Now process command line flags:
if matches.is_present("debug") || (!ignore_environment && env::var_os("PYTHONDEBUG").is_some())
{
settings.debug = true;
}
if matches.is_present("inspect")
|| (!ignore_environment && env::var_os("PYTHONINSPECT").is_some())
{
settings.inspect = true;
}
if matches.is_present("optimize") {
settings.optimize = matches.occurrences_of("optimize").try_into().unwrap();
} else if !ignore_environment {
if let Ok(value) = get_env_var_value("PYTHONOPTIMIZE") {
settings.optimize = value;
}
}
if matches.is_present("verbose") {
settings.verbose = matches.occurrences_of("verbose").try_into().unwrap();
} else if !ignore_environment {
if let Ok(value) = get_env_var_value("PYTHONVERBOSE") {
settings.verbose = value;
}
}
settings.bytes_warning = matches.occurrences_of("bytes-warning");
settings.no_site = matches.is_present("no-site");
if matches.is_present("no-user-site")
|| matches.is_present("isolate")
|| (!ignore_environment && env::var_os("PYTHONNOUSERSITE").is_some())
{
settings.no_user_site = true;
}
if matches.is_present("quiet") {
settings.quiet = true;
}
if matches.is_present("dont-write-bytecode")
|| (!ignore_environment && env::var_os("PYTHONDONTWRITEBYTECODE").is_some())
{
settings.dont_write_bytecode = true;
}
let mut dev_mode = false;
if let Some(xopts) = matches.values_of("implementation-option") {
settings.xopts.extend(xopts.map(|s| {
let mut parts = s.splitn(2, '=');
let name = parts.next().unwrap().to_owned();
if name == "dev" {
dev_mode = true
}
let value = parts.next().map(ToOwned::to_owned);
(name, value)
}));
}
settings.dev_mode = dev_mode;
if dev_mode {
settings.warnopts.push("default".to_owned())
}
if settings.bytes_warning > 0 {
let warn = if settings.bytes_warning > 1 {
"error::BytesWarning"
} else {
"default::BytesWarning"
};
settings.warnopts.push(warn.to_owned());
}
if let Some(warnings) = matches.values_of("warning-control") {
settings.warnopts.extend(warnings.map(ToOwned::to_owned));
}
let argv = if let Some(script) = matches.values_of("script") {
script.map(ToOwned::to_owned).collect()
} else if let Some(module) = matches.values_of("m") {
std::iter::once("PLACEHOLDER".to_owned())
.chain(module.skip(1).map(ToOwned::to_owned))
.collect()
} else if let Some(cmd) = matches.values_of("c") {
std::iter::once("-c".to_owned())
.chain(cmd.skip(1).map(ToOwned::to_owned))
.collect()
} else {
vec!["".to_owned()]
};
let hash_seed = match env::var("PYTHONHASHSEED") {
Ok(s) if s == "random" => Some(None),
Ok(s) => s.parse::<u32>().ok().map(Some),
Err(_) => Some(None),
};
settings.hash_seed = hash_seed.unwrap_or_else(|| {
error!("Fatal Python init error: PYTHONHASHSEED must be \"random\" or an integer in range [0; 4294967295]");
process::exit(1)
});
settings.argv = argv;
settings
}
/// Get environment variable and turn it into integer.
fn get_env_var_value(name: &str) -> Result<u8, std::env::VarError> {
env::var(name).map(|value| {
if let Ok(value) = u8::from_str(&value) {
value
} else {
1
}
})
}
/// Helper function to retrieve a sequence of paths from an environment variable.
fn get_paths(env_variable_name: &str) -> impl Iterator<Item = String> + '_ {
env::var_os(env_variable_name)
.into_iter()
.flat_map(move |paths| {
env::split_paths(&paths)
.map(|path| {
path.into_os_string()
.into_string()
.unwrap_or_else(|_| panic!("{} isn't valid unicode", env_variable_name))
})
.collect::<Vec<_>>()
})
}
#[cfg(feature = "flame-it")]
fn write_profile(matches: &ArgMatches) -> Result<(), Box<dyn std::error::Error>> {
use std::{fs, io};
enum ProfileFormat {
Html,
Text,
Speedscope,
}
let profile_output = matches.value_of_os("profile_output");
let profile_format = match matches.value_of("profile_format") {
Some("html") => ProfileFormat::Html,
Some("text") => ProfileFormat::Text,
None if profile_output == Some("-".as_ref()) => ProfileFormat::Text,
Some("speedscope") | None => ProfileFormat::Speedscope,
Some(other) => {
error!("Unknown profile format {}", other);
process::exit(1);
}
};
let profile_output = profile_output.unwrap_or_else(|| match profile_format {
ProfileFormat::Html => "flame-graph.html".as_ref(),
ProfileFormat::Text => "flame.txt".as_ref(),
ProfileFormat::Speedscope => "flamescope.json".as_ref(),
});
let profile_output: Box<dyn io::Write> = if profile_output == "-" {
Box::new(io::stdout())
} else {
Box::new(fs::File::create(profile_output)?)
};
let profile_output = io::BufWriter::new(profile_output);
match profile_format {
ProfileFormat::Html => flame::dump_html(profile_output)?,
ProfileFormat::Text => flame::dump_text_to_writer(profile_output)?,
ProfileFormat::Speedscope => flamescope::dump(profile_output)?,
}
Ok(())
}
fn run_rustpython(vm: &VirtualMachine, matches: &ArgMatches) -> PyResult<()> {
let scope = vm.new_scope_with_builtins();
let main_module = vm.new_module("__main__", scope.globals.clone());
vm.get_attribute(vm.sys_module.clone(), "modules")?
.set_item("__main__", main_module, vm)?;
let site_result = vm.import("site", &[], 0);
if site_result.is_err() {
warn!(
"Failed to import site, consider adding the Lib directory to your RUSTPYTHONPATH \
environment variable",
);
}
// Figure out if a -c option was given:
if let Some(command) = matches.value_of("c") {
run_command(&vm, scope, command.to_owned())?;
} else if let Some(module) = matches.value_of("m") {
run_module(&vm, module)?;
} else if let Some(filename) = matches.value_of("script") {
run_script(&vm, scope.clone(), filename)?;
if matches.is_present("inspect") {
shell::run_shell(&vm, scope)?;
}
} else {
println!(
"Welcome to the magnificent Rust Python {} interpreter \u{1f631} \u{1f596}",
crate_version!()
);
shell::run_shell(&vm, scope)?;
}
Ok(())
}
fn _run_string(vm: &VirtualMachine, scope: Scope, source: &str, source_path: String) -> PyResult {
let code_obj = vm
.compile(source, compile::Mode::Exec, source_path.clone())
.map_err(|err| vm.new_syntax_error(&err))?;
// trace!("Code object: {:?}", code_obj.borrow());
scope
.globals
.set_item("__file__", vm.ctx.new_str(source_path), vm)?;
vm.run_code_obj(code_obj, scope)
}
fn run_command(vm: &VirtualMachine, scope: Scope, source: String) -> PyResult<()> {
debug!("Running command {}", source);
_run_string(vm, scope, &source, "<stdin>".to_owned())?;
Ok(())
}
fn run_module(vm: &VirtualMachine, module: &str) -> PyResult<()> {
debug!("Running module {}", module);
let runpy = vm.import("runpy", &[], 0)?;
let run_module_as_main = vm.get_attribute(runpy, "_run_module_as_main")?;
vm.invoke(&run_module_as_main, vec![vm.ctx.new_str(module)])?;
Ok(())
}
fn run_script(vm: &VirtualMachine, scope: Scope, script_file: &str) -> PyResult<()> {
debug!("Running file {}", script_file);
// Parse an ast from it:
let file_path = PathBuf::from(script_file);
let file_path = if file_path.is_file() {
file_path
} else if file_path.is_dir() {
let main_file_path = file_path.join("__main__.py");
if main_file_path.is_file() {
main_file_path
} else {
error!(
"can't find '__main__' module in '{}'",
file_path.to_str().unwrap()
);
process::exit(1);
}
} else {
error!(
"can't open file '{}': No such file or directory",
file_path.to_str().unwrap()
);
process::exit(1);
};
let dir = file_path.parent().unwrap().to_str().unwrap().to_owned();
let sys_path = vm.get_attribute(vm.sys_module.clone(), "path").unwrap();
vm.call_method(
&sys_path,
"insert",
vec![vm.ctx.new_int(0), vm.ctx.new_str(dir)],
)?;
match util::read_file(&file_path) {
Ok(source) => {
_run_string(vm, scope, &source, file_path.to_str().unwrap().to_owned())?;
}
Err(err) => {
error!(
"Failed reading file '{}': {:?}",
file_path.to_str().unwrap(),
err.kind()
);
process::exit(1);
}
}
Ok(())
}
#[test]
fn test_run_script() {
Interpreter::default().enter(|vm| {
// test file run
let r = run_script(
vm,
vm.new_scope_with_builtins(),
"extra_tests/snippets/dir_main/__main__.py",
);
assert!(r.is_ok());
// test module run
let r = run_script(
vm,
vm.new_scope_with_builtins(),
"extra_tests/snippets/dir_main",
);
assert!(r.is_ok());
})
}