git.delta.rocks / jrsonnet / refs/commits / 3ee61c42d34d

1#![warn(clippy::all, clippy::nursery, clippy::pedantic)]2#![allow(3	macro_expanded_macro_exports_accessed_by_absolute_paths,4	clippy::ptr_arg,5	// Too verbose6	clippy::must_use_candidate,7	// A lot of functions pass around errors thrown by code8	clippy::missing_errors_doc,9	// A lot of pointers have interior Rc10	clippy::needless_pass_by_value,11	// Its fine12	clippy::wildcard_imports,13	clippy::enum_glob_use,14	clippy::module_name_repetitions,15	// TODO: fix individual issues, however this works as intended almost everywhere16	clippy::cast_precision_loss,17	clippy::cast_possible_wrap,18	clippy::cast_possible_truncation,19	clippy::cast_sign_loss,20	// False positives21	// https://github.com/rust-lang/rust-clippy/issues/690222	clippy::use_self,23	// https://github.com/rust-lang/rust-clippy/issues/853924	clippy::iter_with_drain,25)]2627// For jrsonnet-macros28extern crate self as jrsonnet_evaluator;2930mod ctx;31mod dynamic;32pub mod error;33mod evaluate;34pub mod function;35pub mod gc;36mod import;37mod integrations;38mod map;39mod obj;40pub mod stdlib;41pub mod trace;42pub mod typed;43pub mod val;4445use std::{46	any::Any,47	borrow::Cow,48	cell::{Ref, RefCell, RefMut},49	collections::HashMap,50	fmt::{self, Debug},51	path::{Path, PathBuf},52	rc::Rc,53};5455pub use ctx::*;56pub use dynamic::*;57use error::{Error::*, LocError, Result, StackTraceElement};58pub use evaluate::*;59use function::{CallLocation, TlaArg};60use gc::{GcHashMap, TraceBox};61use hashbrown::hash_map::RawEntryMut;62pub use import::*;63use jrsonnet_gcmodule::{Cc, Trace};64pub use jrsonnet_interner::{IBytes, IStr};65pub use jrsonnet_parser as parser;66use jrsonnet_parser::*;67pub use obj::*;68use trace::{location_to_offset, offset_to_location, CodeLocation, CompactFormat, TraceFormat};69pub use val::{ManifestFormat, Thunk, Val};7071pub trait Unbound: Trace {72	type Bound;73	fn bind(&self, s: State, sup: Option<ObjValue>, this: Option<ObjValue>) -> Result<Self::Bound>;74}7576#[derive(Clone, Trace)]77pub enum LazyBinding {78	Bindable(Cc<TraceBox<dyn Unbound<Bound = Thunk<Val>>>>),79	Bound(Thunk<Val>),80}8182impl Debug for LazyBinding {83	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {84		write!(f, "LazyBinding")85	}86}87impl LazyBinding {88	pub fn evaluate(89		&self,90		s: State,91		sup: Option<ObjValue>,92		this: Option<ObjValue>,93	) -> Result<Thunk<Val>> {94		match self {95			Self::Bindable(v) => v.bind(s, sup, this),96			Self::Bound(v) => Ok(v.clone()),97		}98	}99}100101/// During import, this trait will be called to create initial context for file102/// It may initialize global variables, stdlib for example103pub trait ContextInitializer {104	fn initialize(&self, state: State, for_file: Source) -> Context;105106	/// # Safety107	///108	/// For use only in bindings, should not be used elsewhere.109	/// Implementations which are not intended to be used in bindings110	/// should panic on call to this method.111	unsafe fn as_any(&self) -> &dyn Any;112}113114/// Context initializer, which adds noth115pub struct DummyContextInitializer;116impl ContextInitializer for DummyContextInitializer {117	fn initialize(&self, _state: State, _for_file: Source) -> Context {118		Context::default()119	}120	unsafe fn as_any(&self) -> &dyn Any {121		panic!("`as_any(&self)` is not supported by dummy initializer")122	}123}124125pub struct EvaluationSettings {126	/// Limits recursion by limiting the number of stack frames127	pub max_stack: usize,128	/// Limits amount of stack trace items preserved129	pub max_trace: usize,130	/// TLA vars131	pub tla_vars: HashMap<IStr, TlaArg>,132	/// Context initializer, which will be used for imports and everything133	/// [`NoopContextInitializer`] is used by default, most likely you want to have `jrsonnet-stdlib`134	pub context_initializer: Box<dyn ContextInitializer>,135	/// Used to resolve file locations/contents136	pub import_resolver: Box<dyn ImportResolver>,137	/// Used in manifestification functions138	pub manifest_format: ManifestFormat,139	/// Used for bindings140	pub trace_format: Box<dyn TraceFormat>,141}142impl Default for EvaluationSettings {143	fn default() -> Self {144		Self {145			max_stack: 200,146			max_trace: 20,147			context_initializer: Box::new(DummyContextInitializer),148			tla_vars: HashMap::default(),149			import_resolver: Box::new(DummyImportResolver),150			manifest_format: ManifestFormat::Json {151				padding: 4,152				#[cfg(feature = "exp-preserve-order")]153				preserve_order: false,154			},155			trace_format: Box::new(CompactFormat {156				padding: 4,157				resolver: trace::PathResolver::Absolute,158			}),159		}160	}161}162163#[derive(Default)]164struct EvaluationData {165	/// Used for stack overflow detection, stacktrace is populated on unwind166	stack_depth: usize,167	/// Updated every time stack entry is popt168	stack_generation: usize,169170	breakpoints: Breakpoints,171172	/// Contains file source codes and evaluation results for imports and pretty-printed stacktraces173	files: GcHashMap<PathBuf, FileData>,174	/// Contains tla arguments and others, which aren't needed to be obtained by name, however may be used for receiving source175	/// TODO: look into nix approach, storing source code in `Source` object176	volatile_files: GcHashMap<String, String>,177}178struct FileData {179	string: Option<IStr>,180	bytes: Option<IBytes>,181	parsed: Option<LocExpr>,182	evaluated: Option<Val>,183184	evaluating: bool,185}186impl FileData {187	fn new_string(data: IStr) -> Self {188		Self {189			string: Some(data),190			bytes: None,191			parsed: None,192			evaluated: None,193			evaluating: false,194		}195	}196	fn new_bytes(data: IBytes) -> Self {197		Self {198			string: None,199			bytes: Some(data),200			parsed: None,201			evaluated: None,202			evaluating: false,203		}204	}205}206207#[allow(clippy::type_complexity)]208pub struct Breakpoint {209	loc: ExprLocation,210	collected: RefCell<HashMap<usize, (usize, Vec<Result<Val>>)>>,211}212#[derive(Default)]213struct Breakpoints(Vec<Rc<Breakpoint>>);214impl Breakpoints {215	fn insert(216		&self,217		stack_depth: usize,218		stack_generation: usize,219		loc: &ExprLocation,220		result: Result<Val>,221	) -> Result<Val> {222		if self.0.is_empty() {223			return result;224		}225		for item in &self.0 {226			if item.loc.belongs_to(loc) {227				let mut collected = item.collected.borrow_mut();228				let (depth, vals) = collected.entry(stack_generation).or_default();229				if stack_depth > *depth {230					vals.clear();231				}232				vals.push(result.clone());233			}234		}235		result236	}237}238239#[derive(Default)]240pub struct EvaluationStateInternals {241	/// Internal state242	data: RefCell<EvaluationData>,243	/// Settings, safe to change at runtime244	settings: RefCell<EvaluationSettings>,245}246247/// Maintains stack trace and import resolution248#[derive(Default, Clone)]249pub struct State(Rc<EvaluationStateInternals>);250251impl State {252	pub fn import_str(&self, path: PathBuf) -> Result<IStr> {253		let mut data = self.data_mut();254		let mut file = data.files.raw_entry_mut().from_key(&path);255256		let file = match file {257			RawEntryMut::Occupied(ref mut d) => d.get_mut(),258			RawEntryMut::Vacant(v) => {259				let data = self.settings().import_resolver.load_file_contents(&path)?;260				v.insert(261					path.clone(),262					FileData::new_string(263						std::str::from_utf8(&data)264							.map_err(|_| ImportBadFileUtf8(path.clone()))?265							.into(),266					),267				)268				.1269			}270		};271		if let Some(str) = &file.string {272			return Ok(str.clone());273		}274		if file.string.is_none() {275			file.string = Some(276				file.bytes277					.as_ref()278					.expect("either string or bytes should be set")279					.clone()280					.cast_str()281					.ok_or_else(|| ImportBadFileUtf8(path.clone()))?,282			);283		}284		Ok(file.string.as_ref().expect("just set").clone())285	}286	pub fn import_bin(&self, path: PathBuf) -> Result<IBytes> {287		let mut data = self.data_mut();288		let mut file = data.files.raw_entry_mut().from_key(&path);289290		let file = match file {291			RawEntryMut::Occupied(ref mut d) => d.get_mut(),292			RawEntryMut::Vacant(v) => {293				let data = self.settings().import_resolver.load_file_contents(&path)?;294				v.insert(path.clone(), FileData::new_bytes(data.as_slice().into()))295					.1296			}297		};298		if let Some(str) = &file.bytes {299			return Ok(str.clone());300		}301		if file.bytes.is_none() {302			file.bytes = Some(303				file.string304					.as_ref()305					.expect("either string or bytes should be set")306					.clone()307					.cast_bytes(),308			);309		}310		Ok(file.bytes.as_ref().expect("just set").clone())311	}312	pub fn import(&self, path: PathBuf) -> Result<Val> {313		let mut data = self.data_mut();314		let mut file = data.files.raw_entry_mut().from_key(&path);315316		let file = match file {317			RawEntryMut::Occupied(ref mut d) => d.get_mut(),318			RawEntryMut::Vacant(v) => {319				let data = self.settings().import_resolver.load_file_contents(&path)?;320				v.insert(321					path.clone(),322					FileData::new_string(323						std::str::from_utf8(&data)324							.map_err(|_| ImportBadFileUtf8(path.clone()))?325							.into(),326					),327				)328				.1329			}330		};331		if let Some(val) = &file.evaluated {332			return Ok(val.clone());333		}334		if file.string.is_none() {335			file.string = Some(336				std::str::from_utf8(337					file.bytes338						.as_ref()339						.expect("either string or bytes should be set"),340				)341				.map_err(|_| ImportBadFileUtf8(path.clone()))?342				.into(),343			);344		}345		let code = file.string.as_ref().expect("just set");346		let file_name = Source::new(path.clone()).expect("resolver should return correct name");347		if file.parsed.is_none() {348			file.parsed = Some(349				jrsonnet_parser::parse(350					code,351					&ParserSettings {352						file_name: file_name.clone(),353					},354				)355				.map_err(|e| ImportSyntaxError {356					path: file_name.clone(),357					source_code: code.clone(),358					error: Box::new(e),359				})?,360			);361		}362		let parsed = file.parsed.as_ref().expect("just set").clone();363		if file.evaluating {364			throw!(InfiniteRecursionDetected)365		}366		file.evaluating = true;367		// Dropping file here, as it borrows data, which may be used in evaluation368		drop(data);369		let res = evaluate(370			self.clone(),371			self.create_default_context(file_name),372			&parsed,373		);374375		let mut data = self.data_mut();376		let mut file = data.files.raw_entry_mut().from_key(&path);377378		let file = match file {379			RawEntryMut::Occupied(ref mut d) => d.get_mut(),380			RawEntryMut::Vacant(_) => unreachable!("this file was just here!"),381		};382		file.evaluating = false;383		match res {384			Ok(v) => {385				file.evaluated = Some(v.clone());386				Ok(v)387			}388			Err(e) => Err(e),389		}390	}391392	pub fn get_source(&self, name: Source) -> Option<String> {393		let data = self.data();394		match name.repr() {395			Ok(real) => data396				.files397				.get(real)398				.and_then(|f| f.string.as_ref())399				.map(ToString::to_string),400			Err(e) => data.volatile_files.get(e).map(ToOwned::to_owned),401		}402	}403	pub fn map_source_locations(&self, file: Source, locs: &[u32]) -> Vec<CodeLocation> {404		offset_to_location(&self.get_source(file).unwrap_or_else(|| "".into()), locs)405	}406	pub fn map_from_source_location(407		&self,408		file: Source,409		line: usize,410		column: usize,411	) -> Option<usize> {412		location_to_offset(413			&self.get_source(file).expect("file not found"),414			line,415			column,416		)417	}418419	/// Creates context with all passed global variables420	pub fn create_default_context(&self, source: Source) -> Context {421		let context_initializer = &self.settings().context_initializer;422		context_initializer.initialize(self.clone(), source)423	}424425	/// Executes code creating a new stack frame426	pub fn push<T>(427		&self,428		e: CallLocation,429		frame_desc: impl FnOnce() -> String,430		f: impl FnOnce() -> Result<T>,431	) -> Result<T> {432		{433			let mut data = self.data_mut();434			let stack_depth = &mut data.stack_depth;435			if *stack_depth > self.max_stack() {436				// Error creation uses data, so i drop guard here437				drop(data);438				throw!(StackOverflow);439			}440			*stack_depth += 1;441		}442		let result = f();443		{444			let mut data = self.data_mut();445			data.stack_depth -= 1;446			data.stack_generation += 1;447		}448		if let Err(mut err) = result {449			err.trace_mut().0.push(StackTraceElement {450				location: e.0.cloned(),451				desc: frame_desc(),452			});453			return Err(err);454		}455		result456	}457458	/// Executes code creating a new stack frame459	pub fn push_val(460		&self,461		e: &ExprLocation,462		frame_desc: impl FnOnce() -> String,463		f: impl FnOnce() -> Result<Val>,464	) -> Result<Val> {465		{466			let mut data = self.data_mut();467			let stack_depth = &mut data.stack_depth;468			if *stack_depth > self.max_stack() {469				// Error creation uses data, so i drop guard here470				drop(data);471				throw!(StackOverflow);472			}473			*stack_depth += 1;474		}475		let mut result = f();476		{477			let mut data = self.data_mut();478			data.stack_depth -= 1;479			data.stack_generation += 1;480			result = data481				.breakpoints482				.insert(data.stack_depth, data.stack_generation, e, result);483		}484		if let Err(mut err) = result {485			err.trace_mut().0.push(StackTraceElement {486				location: Some(e.clone()),487				desc: frame_desc(),488			});489			return Err(err);490		}491		result492	}493	/// Executes code creating a new stack frame494	pub fn push_description<T>(495		&self,496		frame_desc: impl FnOnce() -> String,497		f: impl FnOnce() -> Result<T>,498	) -> Result<T> {499		{500			let mut data = self.data_mut();501			let stack_depth = &mut data.stack_depth;502			if *stack_depth > self.max_stack() {503				// Error creation uses data, so i drop guard here504				drop(data);505				throw!(StackOverflow);506			}507			*stack_depth += 1;508		}509		let result = f();510		{511			let mut data = self.data_mut();512			data.stack_depth -= 1;513			data.stack_generation += 1;514		}515		if let Err(mut err) = result {516			err.trace_mut().0.push(StackTraceElement {517				location: None,518				desc: frame_desc(),519			});520			return Err(err);521		}522		result523	}524525	/// # Panics526	/// In case of formatting failure527	pub fn stringify_err(&self, e: &LocError) -> String {528		let mut out = String::new();529		self.settings()530			.trace_format531			.write_trace(&mut out, self, e)532			.unwrap();533		out534	}535536	pub fn manifest(&self, val: Val) -> Result<IStr> {537		self.push_description(538			|| "manifestification".to_string(),539			|| val.manifest(self.clone(), &self.manifest_format()),540		)541	}542	pub fn manifest_multi(&self, val: Val) -> Result<Vec<(IStr, IStr)>> {543		val.manifest_multi(self.clone(), &self.manifest_format())544	}545	pub fn manifest_stream(&self, val: Val) -> Result<Vec<IStr>> {546		val.manifest_stream(self.clone(), &self.manifest_format())547	}548549	/// If passed value is function then call with set TLA550	pub fn with_tla(&self, val: Val) -> Result<Val> {551		Ok(match val {552			Val::Func(func) => self.push_description(553				|| "during TLA call".to_owned(),554				|| {555					func.evaluate(556						self.clone(),557						self.create_default_context(Source::new_virtual(Cow::Borrowed("<tla>"))),558						CallLocation::native(),559						&self.settings().tla_vars,560						true,561					)562				},563			)?,564			v => v,565		})566	}567}568569/// Internals570impl State {571	fn data(&self) -> Ref<EvaluationData> {572		self.0.data.borrow()573	}574	fn data_mut(&self) -> RefMut<EvaluationData> {575		self.0.data.borrow_mut()576	}577	pub fn settings(&self) -> Ref<EvaluationSettings> {578		self.0.settings.borrow()579	}580	pub fn settings_mut(&self) -> RefMut<EvaluationSettings> {581		self.0.settings.borrow_mut()582	}583}584585/// Raw methods evaluate passed values but don't perform TLA execution586impl State {587	/// Parses and evaluates the given snippet588	pub fn evaluate_snippet(&self, name: String, code: String) -> Result<Val> {589		let source = Source::new_virtual(Cow::Owned(name.clone()));590		let parsed = jrsonnet_parser::parse(591			&code,592			&ParserSettings {593				file_name: source.clone(),594			},595		)596		.map_err(|e| ImportSyntaxError {597			path: source.clone(),598			source_code: code.clone().into(),599			error: Box::new(e),600		})?;601		self.data_mut().volatile_files.insert(name, code);602		evaluate(self.clone(), self.create_default_context(source), &parsed)603	}604}605606/// Settings utilities607impl State {608	pub fn add_tla(&self, name: IStr, value: Val) {609		self.settings_mut()610			.tla_vars611			.insert(name, TlaArg::Val(value));612	}613	pub fn add_tla_str(&self, name: IStr, value: IStr) {614		self.settings_mut()615			.tla_vars616			.insert(name, TlaArg::String(value));617	}618	pub fn add_tla_code(&self, name: IStr, code: &str) -> Result<()> {619		let source_name = format!("<top-level-arg:{}>", name);620		let source = Source::new_virtual(Cow::Owned(source_name.clone()));621		let parsed = jrsonnet_parser::parse(622			code,623			&ParserSettings {624				file_name: source.clone(),625			},626		)627		.map_err(|e| ImportSyntaxError {628			path: source,629			source_code: code.into(),630			error: Box::new(e),631		})?;632		self.data_mut()633			.volatile_files634			.insert(source_name, code.to_owned());635		self.settings_mut()636			.tla_vars637			.insert(name, TlaArg::Code(parsed));638		Ok(())639	}640641	pub fn resolve_file(&self, from: &Path, path: &str) -> Result<PathBuf> {642		self.settings()643			.import_resolver644			.resolve_file(from, path.as_ref())645	}646647	pub fn import_resolver(&self) -> Ref<dyn ImportResolver> {648		Ref::map(self.settings(), |s| &*s.import_resolver)649	}650	pub fn set_import_resolver(&self, resolver: Box<dyn ImportResolver>) {651		self.settings_mut().import_resolver = resolver;652	}653	pub fn context_initializer(&self) -> Ref<dyn ContextInitializer> {654		Ref::map(self.settings(), |s| &*s.context_initializer)655	}656657	pub fn manifest_format(&self) -> ManifestFormat {658		self.settings().manifest_format.clone()659	}660	pub fn set_manifest_format(&self, format: ManifestFormat) {661		self.settings_mut().manifest_format = format;662	}663664	pub fn trace_format(&self) -> Ref<dyn TraceFormat> {665		Ref::map(self.settings(), |s| &*s.trace_format)666	}667	pub fn set_trace_format(&self, format: Box<dyn TraceFormat>) {668		self.settings_mut().trace_format = format;669	}670671	pub fn max_trace(&self) -> usize {672		self.settings().max_trace673	}674	pub fn set_max_trace(&self, trace: usize) {675		self.settings_mut().max_trace = trace;676	}677678	pub fn max_stack(&self) -> usize {679		self.settings().max_stack680	}681	pub fn set_max_stack(&self, trace: usize) {682		self.settings_mut().max_stack = trace;683	}684}