git.delta.rocks / jrsonnet / refs/commits / d52916af8b0a

1#![feature(box_syntax, box_patterns)]2#![feature(type_alias_impl_trait)]3#![feature(debug_non_exhaustive)]4#![allow(macro_expanded_macro_exports_accessed_by_absolute_paths)]5#![feature(stmt_expr_attributes)]6mod ctx;7mod dynamic;8mod error;9mod evaluate;10mod function;11mod obj;12mod val;1314pub use ctx::*;15pub use dynamic::*;16pub use error::*;17pub use evaluate::*;18use jsonnet_parser::*;19pub use obj::*;20use std::{cell::RefCell, collections::HashMap, fmt::Debug, path::PathBuf, rc::Rc};21pub use val::*;2223rc_fn_helper!(24	Binding,25	binding,26	dyn Fn(Option<ObjValue>, Option<ObjValue>) -> Result<Val>27);28rc_fn_helper!(FunctionRhs, function_rhs, dyn Fn(Context) -> Result<Val>);29rc_fn_helper!(30	FunctionDefault,31	function_default,32	dyn Fn(Context, LocExpr) -> Result<Val>33);3435#[derive(Clone)]36pub enum LazyBinding {37	Bindable(Rc<dyn Fn(Option<ObjValue>, Option<ObjValue>) -> Result<LazyVal>>),38	Bound(LazyVal),39}4041impl Debug for LazyBinding {42	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {43		write!(f, "LazyBinding")44	}45}46impl LazyBinding {47	pub fn evaluate(&self, this: Option<ObjValue>, super_obj: Option<ObjValue>) -> Result<LazyVal> {48		match self {49			LazyBinding::Bindable(v) => v(this, super_obj),50			LazyBinding::Bound(v) => Ok(v.clone()),51		}52	}53}5455pub struct EvaluationSettings {56	max_stack_frames: usize,57	max_stack_trace_size: usize,58}59impl Default for EvaluationSettings {60	fn default() -> Self {61		EvaluationSettings {62			max_stack_frames: 500,63			max_stack_trace_size: 20,64		}65	}66}6768pub struct FileData(String, LocExpr, Option<Val>);69#[derive(Default)]70pub struct EvaluationStateInternals {71	/// Used for stack-overflows and stacktraces72	stack: RefCell<Vec<StackTraceElement>>,73	/// Contains file source codes and evaluated results for imports and pretty74	/// printing stacktraces75	files: RefCell<HashMap<PathBuf, FileData>>,76	globals: RefCell<HashMap<String, Val>>,7778	settings: EvaluationSettings,79}8081thread_local! {82	/// Contains state for currently executing file83	/// Global state is fine there84	pub(crate) static EVAL_STATE: RefCell<Option<EvaluationState>> = RefCell::new(None)85}86#[inline(always)]87pub(crate) fn with_state<T>(f: impl FnOnce(&EvaluationState) -> T) -> T {88	EVAL_STATE.with(89		#[inline(always)]90		|s| f(s.borrow().as_ref().unwrap()),91	)92}93pub(crate) fn create_error<T>(err: Error) -> Result<T> {94	with_state(|s| s.error(err))95}96#[inline(always)]97pub(crate) fn push<T>(e: LocExpr, comment: String, f: impl FnOnce() -> Result<T>) -> Result<T> {98	with_state(|s| s.push(e, comment, f))99}100101/// Maintains stack trace and import resolution102#[derive(Default, Clone)]103pub struct EvaluationState(Rc<EvaluationStateInternals>);104impl EvaluationState {105	pub fn add_file(&self, name: PathBuf, code: String) -> std::result::Result<(), ParseError> {106		self.0.files.borrow_mut().insert(107			name.clone(),108			FileData(109				code.clone(),110				parse(111					&code,112					&ParserSettings {113						file_name: name,114						loc_data: true,115					},116				)?,117				None,118			),119		);120121		Ok(())122	}123	pub fn add_parsed_file(124		&self,125		name: PathBuf,126		code: String,127		parsed: LocExpr,128	) -> std::result::Result<(), ()> {129		self.0130			.files131			.borrow_mut()132			.insert(name, FileData(code, parsed, None));133134		Ok(())135	}136	pub fn get_source(&self, name: &PathBuf) -> Option<String> {137		let ro_map = self.0.files.borrow();138		ro_map.get(name).map(|value| value.0.clone())139	}140	pub fn evaluate_file(&self, name: &PathBuf) -> Result<Val> {141		self.begin_state();142		let expr: LocExpr = {143			let ro_map = self.0.files.borrow();144			let value = ro_map145				.get(name)146				.unwrap_or_else(|| panic!("file not added: {:?}", name));147			if value.2.is_some() {148				return Ok(value.2.clone().unwrap());149			}150			value.1.clone()151		};152		let value = evaluate(self.create_default_context()?, &expr)?;153		{154			self.0155				.files156				.borrow_mut()157				.get_mut(name)158				.unwrap()159				.2160				.replace(value.clone());161		}162		self.end_state();163		Ok(value)164	}165166	pub fn parse_evaluate_raw(&self, code: &str) -> Result<Val> {167		let parsed = parse(168			&code,169			&ParserSettings {170				file_name: PathBuf::from("raw.jsonnet"),171				loc_data: true,172			},173		);174		self.begin_state();175		let value = evaluate(self.create_default_context()?, &parsed.unwrap());176		self.end_state();177		value178	}179180	pub fn add_global(&self, name: String, value: Val) {181		self.0.globals.borrow_mut().insert(name, value);182	}183184	pub fn add_stdlib(&self) {185		self.begin_state();186		use jsonnet_stdlib::STDLIB_STR;187		if cfg!(feature = "serialized-stdlib") {188			self.add_parsed_file(189				PathBuf::from("std.jsonnet"),190				STDLIB_STR.to_owned(),191				bincode::deserialize(include_bytes!(concat!(env!("OUT_DIR"), "/stdlib.bincode")))192					.expect("deserialize stdlib"),193			)194			.unwrap();195		} else {196			self.add_file(PathBuf::from("std.jsonnet"), STDLIB_STR.to_owned())197				.unwrap();198		}199		let val = self.evaluate_file(&PathBuf::from("std.jsonnet")).unwrap();200		self.add_global("std".to_owned(), val);201		self.end_state();202	}203204	pub fn create_default_context(&self) -> Result<Context> {205		let globals = self.0.globals.borrow();206		let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();207		for (name, value) in globals.iter() {208			new_bindings.insert(209				name.clone(),210				LazyBinding::Bound(resolved_lazy_val!(value.clone())),211			);212		}213		Context::new().extend(new_bindings, None, None, None)214	}215216	#[inline(always)]217	pub fn push<T>(&self, e: LocExpr, comment: String, f: impl FnOnce() -> Result<T>) -> Result<T> {218		{219			let mut stack = self.0.stack.borrow_mut();220			if stack.len() > self.0.settings.max_stack_frames {221				drop(stack);222				return self.error(Error::StackOverflow);223			} else {224				stack.push(StackTraceElement(e, comment));225			}226		}227		let result = f();228		self.0.stack.borrow_mut().pop();229		result230	}231	pub fn print_stack_trace(&self) {232		for e in self.stack_trace().0 {233			println!("{:?} - {:?}", e.0, e.1)234		}235	}236	pub fn stack_trace(&self) -> StackTrace {237		StackTrace(238			self.0239				.stack240				.borrow()241				.iter()242				.rev()243				.take(self.0.settings.max_stack_trace_size)244				.cloned()245				.collect(),246		)247	}248	pub fn error<T>(&self, err: Error) -> Result<T> {249		Err(LocError(err, self.stack_trace()))250	}251252	fn begin_state(&self) {253		EVAL_STATE.with(|v| v.borrow_mut().replace(self.clone()));254	}255	fn end_state(&self) {256		EVAL_STATE.with(|v| v.borrow_mut().take());257	}258}259260#[cfg(test)]261pub mod tests {262	use super::Val;263	use crate::EvaluationState;264	use jsonnet_parser::*;265	use std::path::PathBuf;266267	#[test]268	fn eval_state_stacktrace() {269		let state = EvaluationState::default();270		state271			.push(272				loc_expr!(273					Expr::Num(0.0),274					true,275					(PathBuf::from("test1.jsonnet"), 10, 20)276				),277				"outer".to_owned(),278				|| {279					state.push(280						loc_expr!(281							Expr::Num(0.0),282							true,283							(PathBuf::from("test2.jsonnet"), 30, 40)284						),285						"inner".to_owned(),286						|| {287							state.print_stack_trace();288							Ok(())289						},290					)?;291					Ok(())292				},293			)294			.unwrap();295	}296297	#[test]298	fn eval_state_standard() {299		let state = EvaluationState::default();300		state.add_stdlib();301		assert_eq!(302			state303				.parse_evaluate_raw(r#"std.assertEqual(std.base64("test"), "dGVzdA==")"#)304				.unwrap(),305			Val::Bool(true)306		);307	}308309	macro_rules! eval {310		($str: expr) => {311			evaluate(312				Context::new(),313				EvaluationState::default(),314				&parse(315					$str,316					&ParserSettings {317						loc_data: true,318						file_name: "test.jsonnet".to_owned(),319					},320					)321				.unwrap(),322				)323		};324	}325326	macro_rules! eval_stdlib {327		($str: expr) => {{328			let std = "local std = ".to_owned() + jsonnet_stdlib::STDLIB_STR + ";";329			evaluate(330				Context::new(),331				EvaluationState::default(),332				&parse(333					&(std + $str),334					&ParserSettings {335						loc_data: true,336						file_name: "test.jsonnet".to_owned(),337					},338					)339				.unwrap(),340				)341			}};342	}343344	macro_rules! assert_eval {345		($str: expr) => {346			assert_eq!(347				evaluate(348					Context::new(),349					EvaluationState::default(),350					&parse(351						$str,352						&ParserSettings {353							loc_data: true,354							file_name: "test.jsonnet".to_owned(),355						}356						)357					.unwrap()358					),359				Val::Bool(true)360				)361		};362	}363	macro_rules! assert_json {364		($str: expr, $out: expr) => {365			assert_eq!(366				format!(367					"{}",368					evaluate(369						Context::new(),370						EvaluationState::default(),371						&parse(372							$str,373							&ParserSettings {374								loc_data: true,375								file_name: "test.jsonnet".to_owned(),376							}377						)378						.unwrap()379						)380					),381				$out382				)383		};384	}385	macro_rules! assert_json_stdlib {386		($str: expr, $out: expr) => {387			assert_eq!(format!("{}", eval_stdlib!($str)), $out)388		};389	}390	macro_rules! assert_eval_neg {391		($str: expr) => {392			assert_eq!(393				evaluate(394					Context::new(),395					EvaluationState::default(),396					&parse(397						$str,398						&ParserSettings {399							loc_data: true,400							file_name: "test.jsonnet".to_owned(),401						}402						)403					.unwrap()404					),405				Val::Bool(false)406				)407		};408	}409410	/*411	/// Sanity checking, before trusting to another tests412	#[test]413	fn equality_operator() {414		assert_eval!("2 == 2");415		assert_eval_neg!("2 != 2");416		assert_eval!("2 != 3");417		assert_eval_neg!("2 == 3");418		assert_eval!("'Hello' == 'Hello'");419		assert_eval_neg!("'Hello' != 'Hello'");420		assert_eval!("'Hello' != 'World'");421		assert_eval_neg!("'Hello' == 'World'");422	}423424	#[test]425	fn math_evaluation() {426		assert_eval!("2 + 2 * 2 == 6");427		assert_eval!("3 + (2 + 2 * 2) == 9");428	}429430	#[test]431	fn string_concat() {432		assert_eval!("'Hello' + 'World' == 'HelloWorld'");433		assert_eval!("'Hello' * 3 == 'HelloHelloHello'");434		assert_eval!("'Hello' + 'World' * 3 == 'HelloWorldWorldWorld'");435	}436437	#[test]438	fn local() {439		assert_eval!("local a = 2; local b = 3; a + b == 5");440		assert_eval!("local a = 1, b = a + 1; a + b == 3");441		assert_eval!("local a = 1; local a = 2; a == 2");442	}443444	#[test]445	fn object_lazyness() {446		assert_json!("local a = {a:error 'test'}; {}", r#"{}"#);447	}448449	#[test]450	fn object_inheritance() {451		assert_json!("{a: self.b} + {b:3}", r#"{"a":3,"b":3}"#);452	}453454	#[test]455	fn test_object() {456		assert_json!("{a:2}", r#"{"a":2}"#);457		assert_json!("{a:2+2}", r#"{"a":4}"#);458		assert_json!("{a:2}+{b:2}", r#"{"a":2,"b":2}"#);459		assert_json!("{b:3}+{b:2}", r#"{"b":2}"#);460		assert_json!("{b:3}+{b+:2}", r#"{"b":5}"#);461		assert_json!("local test='a'; {[test]:2}", r#"{"a":2}"#);462		assert_json!(463			r#"464				{465					name: "Alice",466					welcome: "Hello " + self.name + "!",467				}468			"#,469			r#"{"name":"Alice","welcome":"Hello Alice!"}"#470		);471		assert_json!(472			r#"473				{474					name: "Alice",475					welcome: "Hello " + self.name + "!",476				} + {477					name: "Bob"478				}479			"#,480			r#"{"name":"Bob","welcome":"Hello Bob!"}"#481		);482	}483484	#[test]485	fn functions() {486		assert_json!(r#"local a = function(b, c = 2) b + c; a(2)"#, "4");487		assert_json!(488			r#"local a = function(b, c = "Dear") b + c + d, d = "World"; a("Hello")"#,489			r#""HelloDearWorld""#490		);491	}492493	#[test]494	fn local_methods() {495		assert_json!(r#"local a(b, c = 2) = b + c; a(2)"#, "4");496		assert_json!(497			r#"local a(b, c = "Dear") = b + c + d, d = "World"; a("Hello")"#,498			r#""HelloDearWorld""#499		);500	}501502	#[test]503	fn object_locals() {504		assert_json!(r#"{local a = 3, b: a}"#, r#"{"b":3}"#);505		assert_json!(r#"{local a = 3, local c = a, b: c}"#, r#"{"b":3}"#);506		assert_json!(507			r#"{local a = function (b) {[b]:4}, test: a("test")}"#,508			r#"{"test":{"test":4}}"#509		);510	}511512	#[test]513	fn direct_self() {514		println!(515			"{:#?}",516			eval!(517				r#"518					{519						local me = self,520						a: 3,521						b(): me.a,522					}523				"#524			)525		);526	}527528	#[test]529	fn indirect_self() {530		// `self` assigned to `me` was lost when being531		// referenced from field532		eval_stdlib!(533			r#"{534				local me = self,535				a: 3,536				b: me.a,537			}.b"#538		);539	}540541	// We can't trust other tests (And official jsonnet testsuite), if assert is not working correctly542	#[test]543	fn std_assert_ok() {544		eval_stdlib!("std.assertEqual(4.5 << 2, 16)");545	}546547	#[test]548	#[should_panic]549	fn std_assert_failure() {550		eval_stdlib!("std.assertEqual(4.5 << 2, 15)");551	}552553	#[test]554	fn string_is_string() {555		assert_eq!(556			eval_stdlib!("local arr = 'hello'; (!std.isArray(arr)) && (!std.isString(arr))"),557			Val::Bool(false)558		);559	}560561	#[test]562	fn base64_works() {563		assert_json_stdlib!(r#"std.base64("test")"#, r#""dGVzdA==""#);564	}565566	#[test]567	fn utf8_chars() {568		assert_json_stdlib!(569			r#"local c="😎";{c:std.codepoint(c),l:std.length(c)}"#,570			r#"{"c":128526,"l":1}"#571		)572	}573574	#[test]575	fn json() {576		assert_json_stdlib!(577			r#"std.manifestJsonEx({a:3, b:4, c:6},"")"#,578			r#""{\n"a": 3,\n"b": 4,\n"c": 6\n}""#579		);580	}581582	#[test]583	fn test() {584		assert_json_stdlib!(585			r#"[[a, b] for a in [1,2,3] for b in [4,5,6]]"#,586			"[[1,4],[1,5],[1,6],[2,4],[2,5],[2,6],[3,4],[3,5],[3,6]]"587		);588	}589590	#[test]591	fn sjsonnet() {592		eval!(593			r#"594			local x0 = {k: 1};595			local x1 = {k: x0.k + x0.k};596			local x2 = {k: x1.k + x1.k};597			local x3 = {k: x2.k + x2.k};598			local x4 = {k: x3.k + x3.k};599			local x5 = {k: x4.k + x4.k};600			local x6 = {k: x5.k + x5.k};601			local x7 = {k: x6.k + x6.k};602			local x8 = {k: x7.k + x7.k};603			local x9 = {k: x8.k + x8.k};604			local x10 = {k: x9.k + x9.k};605			local x11 = {k: x10.k + x10.k};606			local x12 = {k: x11.k + x11.k};607			local x13 = {k: x12.k + x12.k};608			local x14 = {k: x13.k + x13.k};609			local x15 = {k: x14.k + x14.k};610			local x16 = {k: x15.k + x15.k};611			local x17 = {k: x16.k + x16.k};612			local x18 = {k: x17.k + x17.k};613			local x19 = {k: x18.k + x18.k};614			local x20 = {k: x19.k + x19.k};615			local x21 = {k: x20.k + x20.k};616			x21.k617		"#618		);619	}620	*/621}