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, String>>,69 globals: RefCell<HashMap<String, Val>>,7071 72 ext_vars: RefCell<HashMap<String, 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(85 |s| f(s.borrow().as_ref().unwrap()),86 )87}88pub(crate) fn create_error<T>(err: Error) -> Result<T> {89 with_state(|s| s.error(err))90}91pub(crate) fn push<T>(e: LocExpr, comment: String, f: impl FnOnce() -> Result<T>) -> Result<T> {92 with_state(|s| s.push(e, comment, f))93}949596#[derive(Default, Clone)]97pub struct EvaluationState(Rc<EvaluationStateInternals>);98impl EvaluationState {99 pub fn new(settings: EvaluationSettings, import_resolver: Box<dyn ImportResolver>) -> Self {100 EvaluationState(Rc::new(EvaluationStateInternals {101 settings,102 import_resolver,103 ..Default::default()104 }))105 }106 pub fn add_file(&self, name: PathBuf, code: String) -> std::result::Result<(), ParseError> {107 self.0.files.borrow_mut().insert(108 name.clone(),109 FileData(110 code.clone(),111 parse(112 &code,113 &ParserSettings {114 file_name: name,115 loc_data: true,116 },117 )?,118 None,119 ),120 );121122 Ok(())123 }124 pub fn add_parsed_file(125 &self,126 name: PathBuf,127 code: String,128 parsed: LocExpr,129 ) -> std::result::Result<(), ()> {130 self.0131 .files132 .borrow_mut()133 .insert(name, FileData(code, parsed, None));134135 Ok(())136 }137 pub fn get_source(&self, name: &PathBuf) -> Option<String> {138 let ro_map = self.0.files.borrow();139 ro_map.get(name).map(|value| value.0.clone())140 }141 pub fn evaluate_file(&self, name: &PathBuf) -> Result<Val> {142 self.run_in_state(|| {143 let expr: LocExpr = {144 let ro_map = self.0.files.borrow();145 let value = ro_map146 .get(name)147 .unwrap_or_else(|| panic!("file not added: {:?}", name));148 if value.2.is_some() {149 return Ok(value.2.clone().unwrap());150 }151 value.1.clone()152 };153 let value = evaluate(self.create_default_context()?, &expr)?;154 {155 self.0156 .files157 .borrow_mut()158 .get_mut(name)159 .unwrap()160 .2161 .replace(value.clone());162 }163 Ok(value)164 })165 }166 pub(crate) fn import_file(&self, from: &PathBuf, path: &PathBuf) -> Result<Val> {167 let file_path = self.0.import_resolver.resolve_file(from, path)?;168 {169 let files = self.0.files.borrow();170 if files.contains_key(&file_path) {171 return self.evaluate_file(&file_path);172 }173 }174 let contents = self.0.import_resolver.load_file_contents(&file_path)?;175 self.add_file(file_path.clone(), contents).map_err(|e| {176 create_error::<()>(Error::ImportSyntaxError(e))177 .err()178 .unwrap()179 })?;180 self.evaluate_file(&file_path)181 }182 pub(crate) fn import_file_str(&self, from: &PathBuf, path: &PathBuf) -> Result<String> {183 let path = self.0.import_resolver.resolve_file(from, path)?;184 if !self.0.str_files.borrow().contains_key(&path) {185 let file_str = self.0.import_resolver.load_file_contents(&path)?;186 self.0.str_files.borrow_mut().insert(path.clone(), file_str);187 }188 Ok(self.0.str_files.borrow().get(&path).cloned().unwrap())189 }190191 pub fn parse_evaluate_raw(&self, code: &str) -> Result<Val> {192 let parsed = parse(193 &code,194 &ParserSettings {195 file_name: PathBuf::from("raw.jsonnet"),196 loc_data: true,197 },198 )199 .unwrap();200 self.evaluate_raw(parsed)201 }202203 pub fn evaluate_raw(&self, code: LocExpr) -> Result<Val> {204 self.run_in_state(|| evaluate(self.create_default_context()?, &code))205 }206207 pub fn add_global(&self, name: String, value: Val) {208 self.0.globals.borrow_mut().insert(name, value);209 }210 pub fn add_ext_var(&self, name: String, value: Val) {211 self.0.ext_vars.borrow_mut().insert(name, value);212 }213214 pub fn with_stdlib(&self) -> &Self {215 self.run_in_state(|| {216 use jsonnet_stdlib::STDLIB_STR;217 if cfg!(feature = "serialized-stdlib") {218 self.add_parsed_file(219 PathBuf::from("std.jsonnet"),220 STDLIB_STR.to_owned(),221 bincode::deserialize(include_bytes!(concat!(222 env!("OUT_DIR"),223 "/stdlib.bincode"224 )))225 .expect("deserialize stdlib"),226 )227 .unwrap();228 } else {229 self.add_file(PathBuf::from("std.jsonnet"), STDLIB_STR.to_owned())230 .unwrap();231 }232 let val = self.evaluate_file(&PathBuf::from("std.jsonnet")).unwrap();233 self.add_global("std".to_owned(), val);234 });235 self236 }237238 pub fn create_default_context(&self) -> Result<Context> {239 let globals = self.0.globals.borrow();240 let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();241 for (name, value) in globals.iter() {242 new_bindings.insert(243 name.clone(),244 LazyBinding::Bound(resolved_lazy_val!(value.clone())),245 );246 }247 Context::new().extend_unbound(new_bindings, None, None, None)248 }249250 pub fn push<T>(&self, e: LocExpr, comment: String, f: impl FnOnce() -> Result<T>) -> Result<T> {251 {252 let mut stack = self.0.stack.borrow_mut();253 if stack.len() > self.0.settings.max_stack_frames {254 drop(stack);255 return self.error(Error::StackOverflow);256 } else {257 stack.push(StackTraceElement(e, comment));258 }259 }260 let result = f();261 self.0.stack.borrow_mut().pop();262 result263 }264 pub fn print_stack_trace(&self) {265 for e in self.stack_trace().0 {266 println!("{:?} - {:?}", e.0, e.1)267 }268 }269 pub fn stack_trace(&self) -> StackTrace {270 StackTrace(271 self.0272 .stack273 .borrow()274 .iter()275 .rev()276 .take(self.0.settings.max_stack_trace_size)277 .cloned()278 .collect(),279 )280 }281 pub fn error<T>(&self, err: Error) -> Result<T> {282 Err(LocError(err, self.stack_trace()))283 }284285 fn run_in_state<T>(&self, f: impl FnOnce() -> T) -> T {286 EVAL_STATE.with(|v| {287 let has_state = v.borrow().is_some();288 if !has_state {289 v.borrow_mut().replace(self.clone());290 }291 let result = f();292 if !has_state {293 v.borrow_mut().take();294 }295 result296 })297 }298}299300#[cfg(test)]301pub mod tests {302 use super::Val;303 use crate::EvaluationState;304 use jsonnet_parser::*;305 use std::path::PathBuf;306307 #[test]308 fn eval_state_stacktrace() {309 let state = EvaluationState::default();310 state311 .push(312 loc_expr!(313 Expr::Num(0.0),314 true,315 (PathBuf::from("test1.jsonnet"), 10, 20)316 ),317 "outer".to_owned(),318 || {319 state.push(320 loc_expr!(321 Expr::Num(0.0),322 true,323 (PathBuf::from("test2.jsonnet"), 30, 40)324 ),325 "inner".to_owned(),326 || {327 state.print_stack_trace();328 Ok(())329 },330 )?;331 Ok(())332 },333 )334 .unwrap();335 }336337 #[test]338 fn eval_state_standard() {339 let state = EvaluationState::default();340 state.with_stdlib();341 assert_eq!(342 state343 .parse_evaluate_raw(r#"std.assertEqual(std.base64("test"), "dGVzdA==")"#)344 .unwrap(),345 Val::Bool(true)346 );347 }348349 macro_rules! eval {350 ($str: expr) => {351 EvaluationState::default()352 .with_stdlib()353 .parse_evaluate_raw($str)354 .unwrap()355 };356 }357 macro_rules! eval_json {358 ($str: expr) => {{359 let evaluator = EvaluationState::default();360 evaluator.with_stdlib();361 let val = evaluator.parse_evaluate_raw($str).unwrap();362 evaluator.add_global("__tmp__to_yaml__".to_owned(), val);363 evaluator364 .parse_evaluate_raw("std.manifestJsonEx(__tmp__to_yaml__, \"\")")365 .unwrap()366 .try_cast_str("there should be json string")367 .unwrap()368 .clone()369 .replace("\n", "")370 }};371 }372373 374 macro_rules! assert_eval {375 ($str: expr) => {376 assert_eq!(eval!($str), Val::Bool(true))377 };378 }379380 381 macro_rules! assert_eval_neg {382 ($str: expr) => {383 assert_eq!(eval!($str), Val::Bool(false))384 };385 }386 macro_rules! assert_json {387 ($str: expr, $out: expr) => {388 assert_eq!(eval_json!($str), $out.replace("\t", ""))389 };390 }391392 393 #[test]394 fn equality_operator() {395 assert_eval!("2 == 2");396 assert_eval_neg!("2 != 2");397 assert_eval!("2 != 3");398 assert_eval_neg!("2 == 3");399 assert_eval!("'Hello' == 'Hello'");400 assert_eval_neg!("'Hello' != 'Hello'");401 assert_eval!("'Hello' != 'World'");402 assert_eval_neg!("'Hello' == 'World'");403 }404405 #[test]406 fn math_evaluation() {407 assert_eval!("2 + 2 * 2 == 6");408 assert_eval!("3 + (2 + 2 * 2) == 9");409 }410411 #[test]412 fn string_concat() {413 assert_eval!("'Hello' + 'World' == 'HelloWorld'");414 assert_eval!("'Hello' * 3 == 'HelloHelloHello'");415 assert_eval!("'Hello' + 'World' * 3 == 'HelloWorldWorldWorld'");416 }417418 #[test]419 fn faster_join() {420 assert_eval!("std.join([0,0], [[1,2],[3,4],[5,6]]) == [1,2,0,0,3,4,0,0,5,6]");421 assert_eval!("std.join(',', ['1','2','3','4']) == '1,2,3,4'");422 }423424 #[test]425 fn function_contexts() {426 assert_eval!(427 r#"428 local k = {429 t(name = self.h): [self.h, name],430 h: 3,431 };432 local f = {433 t: k.t(),434 h: 4,435 };436 f.t[0] == f.t[1]437 "#438 );439 }440441 #[test]442 fn local() {443 assert_eval!("local a = 2; local b = 3; a + b == 5");444 assert_eval!("local a = 1, b = a + 1; a + b == 3");445 assert_eval!("local a = 1; local a = 2; a == 2");446 }447448 #[test]449 fn object_lazyness() {450 assert_json!("local a = {a:error 'test'}; {}", r#"{}"#);451 }452453 #[test]454 fn object_inheritance() {455 assert_json!("{a: self.b} + {b:3}", r#"{"a": 3,"b": 3}"#);456 }457458 #[test]459 fn object_assertion_success() {460 eval!("{assert \"a\" in self} + {a:2}");461 }462463 #[test]464 fn object_assertion_error() {465 eval!("{assert \"a\" in self}");466 }467468 #[test]469 fn lazy_args() {470 eval!("local test(a) = 2; test(error '3')");471 }472473 #[test]474 fn tailstrict_args() {475 eval!("local test(a) = 2; test(error '3') tailstrict");476 }477478 #[test]479 fn no_binding_error() {480 eval!("a");481 }482483 #[test]484 fn test_object() {485 assert_json!("{a:2}", r#"{"a": 2}"#);486 assert_json!("{a:2+2}", r#"{"a": 4}"#);487 assert_json!("{a:2}+{b:2}", r#"{"a": 2,"b": 2}"#);488 assert_json!("{b:3}+{b:2}", r#"{"b": 2}"#);489 assert_json!("{b:3}+{b+:2}", r#"{"b": 5}"#);490 assert_json!("local test='a'; {[test]:2}", r#"{"a": 2}"#);491 assert_json!(492 r#"493 {494 name: "Alice",495 welcome: "Hello " + self.name + "!",496 }497 "#,498 r#"{"name": "Alice","welcome": "Hello Alice!"}"#499 );500 assert_json!(501 r#"502 {503 name: "Alice",504 welcome: "Hello " + self.name + "!",505 } + {506 name: "Bob"507 }508 "#,509 r#"{"name": "Bob","welcome": "Hello Bob!"}"#510 );511 }512513 #[test]514 fn functions() {515 assert_json!(r#"local a = function(b, c = 2) b + c; a(2)"#, "4");516 assert_json!(517 r#"local a = function(b, c = "Dear") b + c + d, d = "World"; a("Hello")"#,518 r#""HelloDearWorld""#519 );520 }521522 #[test]523 fn local_methods() {524 assert_json!(r#"local a(b, c = 2) = b + c; a(2)"#, "4");525 assert_json!(526 r#"local a(b, c = "Dear") = b + c + d, d = "World"; a("Hello")"#,527 r#""HelloDearWorld""#528 );529 }530531 #[test]532 fn object_locals() {533 assert_json!(r#"{local a = 3, b: a}"#, r#"{"b": 3}"#);534 assert_json!(r#"{local a = 3, local c = a, b: c}"#, r#"{"b": 3}"#);535 assert_json!(536 r#"{local a = function (b) {[b]:4}, test: a("test")}"#,537 r#"{"test": {"test": 4}}"#538 );539 }540541 #[test]542 fn object_comp() {543 assert_json!(544 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}"#,545 "{\"h1_2\": \"0a\",\"h1_3\": \"0a\",\"h1_4\": \"0a\",\"h2_3\": \"a1\",\"h2_4\": \"a1\",\"h3_2\": \"0a\",\"h3_4\": \"a1\"}"546 )547 }548549 #[test]550 fn direct_self() {551 println!(552 "{:#?}",553 eval!(554 r#"555 {556 local me = self,557 a: 3,558 b(): me.a,559 }560 "#561 )562 );563 }564565 #[test]566 fn indirect_self() {567 568 569 eval!(570 r#"{571 local me = self,572 a: 3,573 b: me.a,574 }.b"#575 );576 }577578 579 #[test]580 fn std_assert_ok() {581 eval!("std.assertEqual(4.5 << 2, 16)");582 }583584 #[test]585 #[should_panic]586 fn std_assert_failure() {587 eval!("std.assertEqual(4.5 << 2, 15)");588 }589590 #[test]591 fn string_is_string() {592 assert_eq!(593 eval!("local arr = 'hello'; (!std.isArray(arr)) && (!std.isString(arr))"),594 Val::Bool(false)595 );596 }597598 #[test]599 fn base64_works() {600 assert_json!(r#"std.base64("test")"#, r#""dGVzdA==""#);601 }602603 #[test]604 fn utf8_chars() {605 assert_json!(606 r#"local c="😎";{c:std.codepoint(c),l:std.length(c)}"#,607 r#"{"c": 128526,"l": 1}"#608 )609 }610611 #[test]612 fn json() {613 assert_json!(614 r#"std.manifestJsonEx({a:3, b:4, c:6},"")"#,615 r#""{\n\"a\": 3,\n\"b\": 4,\n\"c\": 6\n}""#616 );617 }618619 #[test]620 fn test() {621 assert_json!(622 r#"[[a, b] for a in [1,2,3] for b in [4,5,6]]"#,623 "[[1,4],[1,5],[1,6],[2,4],[2,5],[2,6],[3,4],[3,5],[3,6]]"624 );625 }626627 #[test]628 fn sjsonnet() {629 eval!(630 r#"631 local x0 = {k: 1};632 local x1 = {k: x0.k + x0.k};633 local x2 = {k: x1.k + x1.k};634 local x3 = {k: x2.k + x2.k};635 local x4 = {k: x3.k + x3.k};636 local x5 = {k: x4.k + x4.k};637 local x6 = {k: x5.k + x5.k};638 local x7 = {k: x6.k + x6.k};639 local x8 = {k: x7.k + x7.k};640 local x9 = {k: x8.k + x8.k};641 local x10 = {k: x9.k + x9.k};642 local x11 = {k: x10.k + x10.k};643 local x12 = {k: x11.k + x11.k};644 local x13 = {k: x12.k + x12.k};645 local x14 = {k: x13.k + x13.k};646 local x15 = {k: x14.k + x14.k};647 local x16 = {k: x15.k + x15.k};648 local x17 = {k: x16.k + x16.k};649 local x18 = {k: x17.k + x17.k};650 local x19 = {k: x18.k + x18.k};651 local x20 = {k: x19.k + x19.k};652 local x21 = {k: x20.k + x20.k};653 x21.k654 "#655 );656 }657}