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)]5mod ctx;6mod dynamic;7mod error;8mod evaluate;9mod function;10mod import;11mod map;12mod obj;13mod val;1415pub use ctx::*;16pub use dynamic::*;17pub use error::*;18pub use evaluate::*;19pub use function::parse_function_call;20pub use import::*;21use jsonnet_parser::*;22pub use obj::*;23use std::{cell::RefCell, collections::HashMap, fmt::Debug, path::PathBuf, rc::Rc};24pub use val::*;2526type BindableFn = dyn Fn(Option<ObjValue>, Option<ObjValue>) -> Result<LazyVal>;27#[derive(Clone)]28pub enum LazyBinding {29 Bindable(Rc<BindableFn>),30 Bound(LazyVal),31}3233impl Debug for LazyBinding {34 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {35 write!(f, "LazyBinding")36 }37}38impl LazyBinding {39 pub fn evaluate(&self, this: Option<ObjValue>, super_obj: Option<ObjValue>) -> Result<LazyVal> {40 match self {41 LazyBinding::Bindable(v) => v(this, super_obj),42 LazyBinding::Bound(v) => Ok(v.clone()),43 }44 }45}4647pub struct EvaluationSettings {48 pub max_stack_frames: usize,49 pub max_stack_trace_size: usize,50}51impl Default for EvaluationSettings {52 fn default() -> Self {53 EvaluationSettings {54 max_stack_frames: 200,55 max_stack_trace_size: 20,56 }57 }58}5960pub struct FileData(String, LocExpr, Option<Val>);61#[derive(Default)]62pub struct EvaluationStateInternals {63 64 stack: RefCell<Vec<StackTraceElement>>,65 66 67 files: RefCell<HashMap<PathBuf, FileData>>,68 str_files: RefCell<HashMap<PathBuf, Rc<str>>>,69 globals: RefCell<HashMap<Rc<str>, Val>>,7071 72 ext_vars: RefCell<HashMap<Rc<str>, Val>>,7374 settings: EvaluationSettings,75 import_resolver: Box<dyn ImportResolver>,76}7778thread_local! {79 80 81 pub(crate) static EVAL_STATE: RefCell<Option<EvaluationState>> = RefCell::new(None)82}83pub(crate) fn with_state<T>(f: impl FnOnce(&EvaluationState) -> T) -> T {84 EVAL_STATE.with(|s| f(s.borrow().as_ref().unwrap()))85}86pub(crate) fn create_error<T>(err: Error) -> Result<T> {87 with_state(|s| s.error(err))88}89pub(crate) fn push<T>(90 e: &Option<ExprLocation>,91 comment: &str,92 f: impl FnOnce() -> Result<T>,93) -> Result<T> {94 if e.is_some() {95 with_state(|s| s.push(e.clone().unwrap(), comment.to_owned(), f))96 } else {97 f()98 }99}100101102#[derive(Default, Clone)]103pub struct EvaluationState(Rc<EvaluationStateInternals>);104impl EvaluationState {105 pub fn new(settings: EvaluationSettings, import_resolver: Box<dyn ImportResolver>) -> Self {106 EvaluationState(Rc::new(EvaluationStateInternals {107 settings,108 import_resolver,109 ..Default::default()110 }))111 }112 pub fn add_file(&self, name: PathBuf, code: String) -> std::result::Result<(), ParseError> {113 self.0.files.borrow_mut().insert(114 name.clone(),115 FileData(116 code.clone(),117 parse(118 &code,119 &ParserSettings {120 file_name: Rc::new(name),121 loc_data: true,122 },123 )?,124 None,125 ),126 );127128 Ok(())129 }130 pub fn add_parsed_file(131 &self,132 name: PathBuf,133 code: String,134 parsed: LocExpr,135 ) -> std::result::Result<(), ()> {136 self.0137 .files138 .borrow_mut()139 .insert(name, FileData(code, parsed, None));140141 Ok(())142 }143 pub fn get_source(&self, name: &PathBuf) -> Option<String> {144 let ro_map = self.0.files.borrow();145 ro_map.get(name).map(|value| value.0.clone())146 }147 pub fn evaluate_file(&self, name: &PathBuf) -> Result<Val> {148 self.run_in_state(|| {149 let expr: LocExpr = {150 let ro_map = self.0.files.borrow();151 let value = ro_map152 .get(name)153 .unwrap_or_else(|| panic!("file not added: {:?}", name));154 if value.2.is_some() {155 return Ok(value.2.clone().unwrap());156 }157 value.1.clone()158 };159 let value = evaluate(self.create_default_context()?, &expr)?;160 {161 self.0162 .files163 .borrow_mut()164 .get_mut(name)165 .unwrap()166 .2167 .replace(value.clone());168 }169 Ok(value)170 })171 }172 pub(crate) fn import_file(&self, from: &PathBuf, path: &PathBuf) -> Result<Val> {173 let file_path = self.0.import_resolver.resolve_file(from, path)?;174 {175 let files = self.0.files.borrow();176 if files.contains_key(&file_path) {177 return self.evaluate_file(&file_path);178 }179 }180 let contents = self.0.import_resolver.load_file_contents(&file_path)?;181 self.add_file(file_path.clone(), contents).map_err(|e| {182 create_error::<()>(Error::ImportSyntaxError(e))183 .err()184 .unwrap()185 })?;186 self.evaluate_file(&file_path)187 }188 pub(crate) fn import_file_str(&self, from: &PathBuf, path: &PathBuf) -> Result<Rc<str>> {189 let path = self.0.import_resolver.resolve_file(from, path)?;190 if !self.0.str_files.borrow().contains_key(&path) {191 let file_str = self.0.import_resolver.load_file_contents(&path)?;192 self.0193 .str_files194 .borrow_mut()195 .insert(path.clone(), file_str.into());196 }197 Ok(self.0.str_files.borrow().get(&path).cloned().unwrap())198 }199200 pub fn parse_evaluate_raw(&self, code: &str) -> Result<Val> {201 let parsed = parse(202 &code,203 &ParserSettings {204 file_name: Rc::new(PathBuf::from("raw.jsonnet")),205 loc_data: true,206 },207 )208 .unwrap();209 self.evaluate_raw(parsed)210 }211212 pub fn evaluate_raw(&self, code: LocExpr) -> Result<Val> {213 self.run_in_state(|| evaluate(self.create_default_context()?, &code))214 }215216 pub fn add_global(&self, name: Rc<str>, value: Val) {217 self.0.globals.borrow_mut().insert(name, value);218 }219 pub fn add_ext_var(&self, name: Rc<str>, value: Val) {220 self.0.ext_vars.borrow_mut().insert(name, value);221 }222223 pub fn with_stdlib(&self) -> &Self {224 self.run_in_state(|| {225 use jsonnet_stdlib::STDLIB_STR;226 if cfg!(feature = "serialized-stdlib") {227 self.add_parsed_file(228 PathBuf::from("std.jsonnet"),229 STDLIB_STR.to_owned(),230 bincode::deserialize(include_bytes!(concat!(231 env!("OUT_DIR"),232 "/stdlib.bincode"233 )))234 .expect("deserialize stdlib"),235 )236 .unwrap();237 } else {238 self.add_file(PathBuf::from("std.jsonnet"), STDLIB_STR.to_owned())239 .unwrap();240 }241 let val = self.evaluate_file(&PathBuf::from("std.jsonnet")).unwrap();242 self.add_global("std".into(), val);243 });244 self245 }246247 pub fn create_default_context(&self) -> Result<Context> {248 let globals = self.0.globals.borrow();249 let mut new_bindings: HashMap<Rc<str>, LazyBinding> = HashMap::new();250 for (name, value) in globals.iter() {251 new_bindings.insert(252 name.clone(),253 LazyBinding::Bound(resolved_lazy_val!(value.clone())),254 );255 }256 Context::new().extend_unbound(new_bindings, None, None, None)257 }258259 pub fn push<T>(260 &self,261 e: ExprLocation,262 comment: String,263 f: impl FnOnce() -> Result<T>,264 ) -> Result<T> {265 {266 let mut stack = self.0.stack.borrow_mut();267 if stack.len() > self.0.settings.max_stack_frames {268 drop(stack);269 return self.error(Error::StackOverflow);270 } else {271 stack.push(StackTraceElement(e, comment));272 }273 }274 let result = f();275 self.0.stack.borrow_mut().pop();276 result277 }278 pub fn print_stack_trace(&self) {279 for e in self.stack_trace().0 {280 println!("{:?} - {:?}", e.0, e.1)281 }282 }283 pub fn stack_trace(&self) -> StackTrace {284 StackTrace(285 self.0286 .stack287 .borrow()288 .iter()289 .rev()290 .take(self.0.settings.max_stack_trace_size)291 .cloned()292 .collect(),293 )294 }295 pub fn error<T>(&self, err: Error) -> Result<T> {296 Err(LocError(err, self.stack_trace()))297 }298299 fn run_in_state<T>(&self, f: impl FnOnce() -> T) -> T {300 EVAL_STATE.with(|v| {301 let has_state = v.borrow().is_some();302 if !has_state {303 v.borrow_mut().replace(self.clone());304 }305 let result = f();306 if !has_state {307 v.borrow_mut().take();308 }309 result310 })311 }312}313314#[cfg(test)]315pub mod tests {316 use super::Val;317 use crate::EvaluationState;318 use jsonnet_parser::*;319 use std::{path::PathBuf, rc::Rc};320321 #[test]322 fn eval_state_stacktrace() {323 let state = EvaluationState::default();324 state325 .push(326 ExprLocation(Rc::new(PathBuf::from("test1.jsonnet")), 10, 20),327 "outer".to_owned(),328 || {329 state.push(330 ExprLocation(Rc::new(PathBuf::from("test2.jsonnet")), 30, 40),331 "inner".to_owned(),332 || {333 state.print_stack_trace();334 Ok(())335 },336 )?;337 Ok(())338 },339 )340 .unwrap();341 }342343 #[test]344 fn eval_state_standard() {345 let state = EvaluationState::default();346 state.with_stdlib();347 assert_eq!(348 state349 .parse_evaluate_raw(r#"std.assertEqual(std.base64("test"), "dGVzdA==")"#)350 .unwrap(),351 Val::Bool(true)352 );353 }354355 macro_rules! eval {356 ($str: expr) => {357 EvaluationState::default()358 .with_stdlib()359 .parse_evaluate_raw($str)360 .unwrap()361 };362 }363 macro_rules! eval_json {364 ($str: expr) => {{365 let evaluator = EvaluationState::default();366 evaluator.with_stdlib();367 let val = evaluator.parse_evaluate_raw($str).unwrap();368 evaluator.add_global("__tmp__to_yaml__".into(), val);369 evaluator370 .parse_evaluate_raw("std.manifestJsonEx(__tmp__to_yaml__, \"\")")371 .unwrap()372 .try_cast_str("there should be json string")373 .unwrap()374 .clone()375 .replace("\n", "")376 }};377 }378379 380 macro_rules! assert_eval {381 ($str: expr) => {382 assert_eq!(eval!($str), Val::Bool(true))383 };384 }385386 387 macro_rules! assert_eval_neg {388 ($str: expr) => {389 assert_eq!(eval!($str), Val::Bool(false))390 };391 }392 macro_rules! assert_json {393 ($str: expr, $out: expr) => {394 assert_eq!(eval_json!($str), $out.replace("\t", ""))395 };396 }397398 399 #[test]400 fn equality_operator() {401 assert_eval!("2 == 2");402 assert_eval_neg!("2 != 2");403 assert_eval!("2 != 3");404 assert_eval_neg!("2 == 3");405 assert_eval!("'Hello' == 'Hello'");406 assert_eval_neg!("'Hello' != 'Hello'");407 assert_eval!("'Hello' != 'World'");408 assert_eval_neg!("'Hello' == 'World'");409 }410411 #[test]412 fn math_evaluation() {413 assert_eval!("2 + 2 * 2 == 6");414 assert_eval!("3 + (2 + 2 * 2) == 9");415 }416417 #[test]418 fn string_concat() {419 assert_eval!("'Hello' + 'World' == 'HelloWorld'");420 assert_eval!("'Hello' * 3 == 'HelloHelloHello'");421 assert_eval!("'Hello' + 'World' * 3 == 'HelloWorldWorldWorld'");422 }423424 #[test]425 fn faster_join() {426 assert_eval!("std.join([0,0], [[1,2],[3,4],[5,6]]) == [1,2,0,0,3,4,0,0,5,6]");427 assert_eval!("std.join(',', ['1','2','3','4']) == '1,2,3,4'");428 }429430 #[test]431 fn function_contexts() {432 assert_eval!(433 r#"434 local k = {435 t(name = self.h): [self.h, name],436 h: 3,437 };438 local f = {439 t: k.t(),440 h: 4,441 };442 f.t[0] == f.t[1]443 "#444 );445 }446447 #[test]448 fn local() {449 assert_eval!("local a = 2; local b = 3; a + b == 5");450 assert_eval!("local a = 1, b = a + 1; a + b == 3");451 assert_eval!("local a = 1; local a = 2; a == 2");452 }453454 #[test]455 fn object_lazyness() {456 assert_json!("local a = {a:error 'test'}; {}", r#"{}"#);457 }458459 #[test]460 fn object_inheritance() {461 assert_json!("{a: self.b} + {b:3}", r#"{"a": 3,"b": 3}"#);462 }463464 #[test]465 fn object_assertion_success() {466 eval!("{assert \"a\" in self} + {a:2}");467 }468469 #[test]470 fn object_assertion_error() {471 eval!("{assert \"a\" in self}");472 }473474 #[test]475 fn lazy_args() {476 eval!("local test(a) = 2; test(error '3')");477 }478479 #[test]480 fn tailstrict_args() {481 eval!("local test(a) = 2; test(error '3') tailstrict");482 }483484 #[test]485 fn no_binding_error() {486 eval!("a");487 }488489 #[test]490 fn test_object() {491 assert_json!("{a:2}", r#"{"a": 2}"#);492 assert_json!("{a:2+2}", r#"{"a": 4}"#);493 assert_json!("{a:2}+{b:2}", r#"{"a": 2,"b": 2}"#);494 assert_json!("{b:3}+{b:2}", r#"{"b": 2}"#);495 assert_json!("{b:3}+{b+:2}", r#"{"b": 5}"#);496 assert_json!("local test='a'; {[test]:2}", r#"{"a": 2}"#);497 assert_json!(498 r#"499 {500 name: "Alice",501 welcome: "Hello " + self.name + "!",502 }503 "#,504 r#"{"name": "Alice","welcome": "Hello Alice!"}"#505 );506 assert_json!(507 r#"508 {509 name: "Alice",510 welcome: "Hello " + self.name + "!",511 } + {512 name: "Bob"513 }514 "#,515 r#"{"name": "Bob","welcome": "Hello Bob!"}"#516 );517 }518519 #[test]520 fn functions() {521 assert_json!(r#"local a = function(b, c = 2) b + c; a(2)"#, "4");522 assert_json!(523 r#"local a = function(b, c = "Dear") b + c + d, d = "World"; a("Hello")"#,524 r#""HelloDearWorld""#525 );526 }527528 #[test]529 fn local_methods() {530 assert_json!(r#"local a(b, c = 2) = b + c; a(2)"#, "4");531 assert_json!(532 r#"local a(b, c = "Dear") = b + c + d, d = "World"; a("Hello")"#,533 r#""HelloDearWorld""#534 );535 }536537 #[test]538 fn object_locals() {539 assert_json!(r#"{local a = 3, b: a}"#, r#"{"b": 3}"#);540 assert_json!(r#"{local a = 3, local c = a, b: c}"#, r#"{"b": 3}"#);541 assert_json!(542 r#"{local a = function (b) {[b]:4}, test: a("test")}"#,543 r#"{"test": {"test": 4}}"#544 );545 }546547 #[test]548 fn object_comp() {549 assert_json!(550 r#"{local t = "a", ["h"+i+"_"+z]: if "h"+(i-1)+"_"+z in self then t+1 else 0+t for i in [1,2,3] for z in [2,3,4] if z != i}"#,551 "{\"h1_2\": \"0a\",\"h1_3\": \"0a\",\"h1_4\": \"0a\",\"h2_3\": \"a1\",\"h2_4\": \"a1\",\"h3_2\": \"0a\",\"h3_4\": \"a1\"}"552 )553 }554555 #[test]556 fn direct_self() {557 println!(558 "{:#?}",559 eval!(560 r#"561 {562 local me = self,563 a: 3,564 b(): me.a,565 }566 "#567 )568 );569 }570571 #[test]572 fn indirect_self() {573 574 575 eval!(576 r#"{577 local me = self,578 a: 3,579 b: me.a,580 }.b"#581 );582 }583584 585 #[test]586 fn std_assert_ok() {587 eval!("std.assertEqual(4.5 << 2, 16)");588 }589590 #[test]591 #[should_panic]592 fn std_assert_failure() {593 eval!("std.assertEqual(4.5 << 2, 15)");594 }595596 #[test]597 fn string_is_string() {598 assert_eq!(599 eval!("local arr = 'hello'; (!std.isArray(arr)) && (!std.isString(arr))"),600 Val::Bool(false)601 );602 }603604 #[test]605 fn base64_works() {606 assert_json!(r#"std.base64("test")"#, r#""dGVzdA==""#);607 }608609 #[test]610 fn utf8_chars() {611 assert_json!(612 r#"local c="😎";{c:std.codepoint(c),l:std.length(c)}"#,613 r#"{"c": 128526,"l": 1}"#614 )615 }616617 #[test]618 fn json() {619 assert_json!(620 r#"std.manifestJsonEx({a:3, b:4, c:6},"")"#,621 r#""{\n\"a\": 3,\n\"b\": 4,\n\"c\": 6\n}""#622 );623 }624625 #[test]626 fn test() {627 assert_json!(628 r#"[[a, b] for a in [1,2,3] for b in [4,5,6]]"#,629 "[[1,4],[1,5],[1,6],[2,4],[2,5],[2,6],[3,4],[3,5],[3,6]]"630 );631 }632633 #[test]634 fn sjsonnet() {635 eval!(636 r#"637 local x0 = {k: 1};638 local x1 = {k: x0.k + x0.k};639 local x2 = {k: x1.k + x1.k};640 local x3 = {k: x2.k + x2.k};641 local x4 = {k: x3.k + x3.k};642 local x5 = {k: x4.k + x4.k};643 local x6 = {k: x5.k + x5.k};644 local x7 = {k: x6.k + x6.k};645 local x8 = {k: x7.k + x7.k};646 local x9 = {k: x8.k + x8.k};647 local x10 = {k: x9.k + x9.k};648 local x11 = {k: x10.k + x10.k};649 local x12 = {k: x11.k + x11.k};650 local x13 = {k: x12.k + x12.k};651 local x14 = {k: x13.k + x13.k};652 local x15 = {k: x14.k + x14.k};653 local x16 = {k: x15.k + x15.k};654 local x17 = {k: x16.k + x16.k};655 local x18 = {k: x17.k + x17.k};656 local x19 = {k: x18.k + x18.k};657 local x20 = {k: x19.k + x19.k};658 local x21 = {k: x20.k + x20.k};659 x21.k660 "#661 );662 }663}