git.delta.rocks / jrsonnet / refs/commits / 54c4db58ad3d

difftreelog

fix makeArray should be lazy

Yaroslav Bolyukin2022-12-03parent: #2afd5ff.patch.diff
in: master

7 files changed

modifiedcrates/jrsonnet-evaluator/src/arr/mod.rsdiffbeforeafterboth
--- a/crates/jrsonnet-evaluator/src/arr/mod.rs
+++ b/crates/jrsonnet-evaluator/src/arr/mod.rs
@@ -32,6 +32,8 @@
 	Reverse(Box<ReverseArray>),
 	/// Returned by `std.map` call
 	Mapped(MappedArray),
+	/// Returned by `std.repeat` call
+	Repeated(RepeatedArray),
 }
 
 impl ArrValue {
@@ -51,6 +53,10 @@
 		Self::Eager(EagerArray(values))
 	}
 
+	pub fn repeated(data: ArrValue, repeats: usize) -> Option<Self> {
+		Some(Self::Repeated(RepeatedArray::new(data, repeats)?))
+	}
+
 	pub fn bytes(bytes: IBytes) -> Self {
 		Self::Bytes(BytesArray(bytes))
 	}
@@ -76,7 +82,11 @@
 		// TODO: benchmark for an optimal value, currently just a arbitrary choice
 		const ARR_EXTEND_THRESHOLD: usize = 100;
 
-		if a.len() + b.len() > ARR_EXTEND_THRESHOLD {
+		if a.is_empty() {
+			b
+		} else if b.is_empty() {
+			a
+		} else if a.len() + b.len() > ARR_EXTEND_THRESHOLD {
 			Self::Extended(Cc::new(ExtendedArray::new(a, b)))
 		} else if let (Some(a), Some(b)) = (a.iter_cheap(), b.iter_cheap()) {
 			let mut out = Vec::with_capacity(a.len() + b.len());
@@ -189,10 +199,8 @@
 			(ArrValue::Lazy(a), ArrValue::Lazy(b)) => Cc::ptr_eq(&a.0, &b.0),
 			(ArrValue::Expr(a), ArrValue::Expr(b)) => Cc::ptr_eq(&a.0, &b.0),
 			(ArrValue::Eager(a), ArrValue::Eager(b)) => Cc::ptr_eq(&a.0, &b.0),
-			(ArrValue::Extended(a), ArrValue::Extended(b)) => Cc::ptr_eq(&a, &b),
+			(ArrValue::Extended(a), ArrValue::Extended(b)) => Cc::ptr_eq(a, b),
 			(ArrValue::Range(a), ArrValue::Range(b)) => a == b,
-			(ArrValue::Slice(_), ArrValue::Slice(_)) => false,
-			(ArrValue::Reverse(_), ArrValue::Reverse(_)) => false,
 			_ => false,
 		}
 	}
@@ -203,6 +211,7 @@
 			ArrValue::Extended(v) => v.a.is_cheap() && v.b.is_cheap(),
 			ArrValue::Slice(r) => r.inner.is_cheap(),
 			ArrValue::Reverse(i) => i.0.is_cheap(),
+			ArrValue::Repeated(v) => v.is_cheap(),
 			ArrValue::Expr(_) | ArrValue::Lazy(_) | ArrValue::Mapped(_) => false,
 		}
 	}
modifiedcrates/jrsonnet-evaluator/src/arr/spec.rsdiffbeforeafterboth
--- a/crates/jrsonnet-evaluator/src/arr/spec.rs
+++ b/crates/jrsonnet-evaluator/src/arr/spec.rs
@@ -740,6 +740,96 @@
 }
 // impl MappedArray
 
+#[derive(Trace, Debug)]
+pub struct RepeatedArrayInner {
+	data: ArrValue,
+	repeats: usize,
+	total_len: usize,
+}
+#[derive(Trace, Debug, Clone)]
+pub struct RepeatedArray(Cc<RepeatedArrayInner>);
+impl RepeatedArray {
+	pub fn new(data: ArrValue, repeats: usize) -> Option<Self> {
+		let total_len = data.len().checked_mul(repeats)?;
+		Some(Self(Cc::new(RepeatedArrayInner {
+			data,
+			repeats,
+			total_len,
+		})))
+	}
+	pub fn is_cheap(&self) -> bool {
+		self.0.data.is_cheap()
+	}
+}
+
+type RepeatedArrayIter<'t> = impl DoubleEndedIterator<Item = Result<Val>> + ExactSizeIterator + 't;
+type RepeatedArrayLazyIter<'t> =
+	impl DoubleEndedIterator<Item = Thunk<Val>> + ExactSizeIterator + 't;
+type RepeatedArrayCheapIter<'t> = impl DoubleEndedIterator<Item = Val> + ExactSizeIterator + 't;
+impl ArrayLike for RepeatedArray {
+	type Iter<'t> = RepeatedArrayIter<'t>;
+	type IterLazy<'t> = RepeatedArrayLazyIter<'t>;
+	type IterCheap<'t> = RepeatedArrayCheapIter<'t>;
+
+	fn len(&self) -> usize {
+		self.0.total_len
+	}
+
+	fn get(&self, index: usize) -> Result<Option<Val>> {
+		if index > self.0.total_len {
+			return Ok(None);
+		}
+		self.0.data.get(index % self.0.data.len())
+	}
+
+	fn get_lazy(&self, index: usize) -> Option<Thunk<Val>> {
+		if index > self.0.total_len {
+			return None;
+		}
+		self.0.data.get_lazy(index % self.0.data.len())
+	}
+
+	fn get_cheap(&self, index: usize) -> Option<Val> {
+		if index > self.0.total_len {
+			return None;
+		}
+		self.0.data.get_cheap(index % self.0.data.len())
+	}
+
+	fn evaluated(&self) -> Result<Vec<Val>> {
+		let mut data = self.0.data.evaluated()?;
+		let data_range = 0..data.len();
+		for _ in 1..self.0.repeats {
+			data.extend_from_within(data_range.clone());
+		}
+		Ok(data)
+	}
+
+	fn iter(&self) -> RepeatedArrayIter<'_> {
+		(0..self.0.total_len)
+			.map(|i| self.get(i))
+			.map(Result::transpose)
+			.map(Option::unwrap)
+	}
+
+	fn iter_lazy(&self) -> RepeatedArrayLazyIter<'_> {
+		(0..self.0.total_len)
+			.map(|i| self.get_lazy(i))
+			.map(Option::unwrap)
+	}
+
+	fn iter_cheap(&self) -> Option<RepeatedArrayCheapIter<'_>> {
+		if !self.0.data.is_cheap() {
+			return None;
+		}
+		Some(
+			(0..self.0.total_len)
+				.map(|i| self.get_cheap(i))
+				.map(Option::unwrap),
+		)
+	}
+}
+
 macro_rules! impl_iter_enum {
 	($n:ident => $v:ident) => {
 		pub enum $n<'t> {
@@ -752,6 +842,7 @@
 			Extended(Box<<ExtendedArray as ArrayLike>::$v<'t>>),
 			Reverse(Box<<ReverseArray as ArrayLike>::$v<'t>>),
 			Mapped(Box<<MappedArray as ArrayLike>::$v<'t>>),
+			Repeated(Box<<RepeatedArray as ArrayLike>::$v<'t>>),
 		}
 	};
 }
@@ -768,6 +859,7 @@
 			Self::Extended(e) => e.$m($($ident)*),
 			Self::Reverse(e) => e.$m($($ident)*),
 			Self::Mapped(e) => e.$m($($ident)*),
+			Self::Repeated(e) => e.$m($($ident)*),
 		}
 	};
 }
@@ -785,6 +877,7 @@
 			ArrValue::Extended(e) => $e::Extended(Box::new($($wrap!)?(e.$c()))),
 			ArrValue::Reverse(e) => $e::Reverse(Box::new($($wrap!)?(e.$c()))),
 			ArrValue::Mapped(e) => $e::Mapped(Box::new($($wrap!)?(e.$c()))),
+			ArrValue::Repeated(e) => $e::Repeated(Box::new($($wrap!)?(e.$c()))),
 		}
 	};
 }
@@ -827,6 +920,7 @@
 					}
 					Self::Reverse(e) => e.len(),
 					Self::Mapped(e) => e.len(),
+					Self::Repeated(e) => e.len(),
 				}
 			}
 		}
modifiedcrates/jrsonnet-evaluator/src/function/mod.rsdiffbeforeafterboth
--- a/crates/jrsonnet-evaluator/src/function/mod.rs
+++ b/crates/jrsonnet-evaluator/src/function/mod.rs
@@ -12,7 +12,9 @@
 	native::NativeDesc,
 	parse::{parse_default_function_call, parse_function_call},
 };
-use crate::{evaluate, gc::TraceBox, typed::Any, Context, ContextBuilder, Result, Val};
+use crate::{
+	evaluate, evaluate_trivial, gc::TraceBox, typed::Any, Context, ContextBuilder, Result, Val,
+};
 
 pub mod arglike;
 pub mod builtin;
@@ -80,6 +82,10 @@
 	) -> Result<Context> {
 		parse_function_call(call_ctx, self.ctx.clone(), &self.params, args, tailstrict)
 	}
+
+	pub fn evaluate_trivial(&self) -> Option<Val> {
+		evaluate_trivial(&self.body)
+	}
 }
 
 /// Represents a Jsonnet function value, including plain functions and user-provided builtins.
@@ -201,4 +207,11 @@
 	pub const fn identity() -> Self {
 		Self::Id
 	}
+
+	pub fn evaluate_trivial(&self) -> Option<Val> {
+		match self {
+			FuncVal::Normal(n) => n.evaluate_trivial(),
+			_ => None,
+		}
+	}
 }
modifiedcrates/jrsonnet-stdlib/src/arrays.rsdiffbeforeafterboth
--- a/crates/jrsonnet-stdlib/src/arrays.rs
+++ b/crates/jrsonnet-stdlib/src/arrays.rs
@@ -1,23 +1,41 @@
 use jrsonnet_evaluator::{
-	error::Result,
+	error::{ErrorKind::RuntimeError, Result},
 	function::{builtin, FuncVal},
 	throw,
-	typed::{Any, BoundedUsize, Either2, NativeFn, Typed, VecVal},
-	val::{equals, ArrValue, IndexableVal},
+	typed::{Any, BoundedI32, BoundedUsize, Either2, NativeFn, Typed},
+	val::{equals, ArrValue, IndexableVal, StrValue},
 	Either, IStr, Val,
 };
 use jrsonnet_gcmodule::Cc;
 
 #[builtin]
-pub fn builtin_make_array(sz: usize, func: NativeFn<((f64,), Any)>) -> Result<VecVal> {
-	let mut out = Vec::with_capacity(sz);
-	for i in 0..sz {
-		out.push(func(i as f64)?.0);
+pub fn builtin_make_array(sz: BoundedI32<0, { i32::MAX }>, func: FuncVal) -> Result<ArrValue> {
+	if *sz == 0 {
+		return Ok(ArrValue::empty());
+	}
+	if let Some(trivial) = func.evaluate_trivial() {
+		let mut out = Vec::with_capacity(*sz as usize);
+		for _ in 0..*sz {
+			out.push(trivial.clone())
+		}
+		Ok(ArrValue::eager(Cc::new(out)))
+	} else {
+		Ok(ArrValue::range_exclusive(0, *sz).map(func))
 	}
-	Ok(VecVal(Cc::new(out)))
 }
 
 #[builtin]
+pub fn builtin_repeat(what: Either![IStr, ArrValue], count: usize) -> Result<Any> {
+	Ok(Any(match what {
+		Either2::A(s) => Val::Str(StrValue::Flat(s.repeat(count).into())),
+		Either2::B(arr) => Val::Arr(
+			ArrValue::repeated(arr, count)
+				.ok_or_else(|| RuntimeError("repeated length overflow".into()))?,
+		),
+	}))
+}
+
+#[builtin]
 pub fn builtin_slice(
 	indexable: IndexableVal,
 	index: Option<BoundedUsize<0, { i32::MAX as usize }>>,
modifiedcrates/jrsonnet-stdlib/src/lib.rsdiffbeforeafterboth
before · crates/jrsonnet-stdlib/src/lib.rs
1use std::{2	cell::{Ref, RefCell, RefMut},3	collections::HashMap,4	rc::Rc,5};67use jrsonnet_evaluator::{8	error::{ErrorKind::*, Result},9	function::{builtin::Builtin, CallLocation, FuncVal, TlaArg},10	gc::{GcHashMap, TraceBox},11	tb,12	trace::PathResolver,13	Context, ContextBuilder, IStr, ObjValue, ObjValueBuilder, State, Thunk, Val,14};15use jrsonnet_gcmodule::{Cc, Trace};16use jrsonnet_parser::Source;1718mod expr;19mod types;20pub use types::*;21mod arrays;22pub use arrays::*;23mod math;24pub use math::*;25mod operator;26pub use operator::*;27mod sort;28pub use sort::*;29mod hash;30pub use hash::*;31mod encoding;32pub use encoding::*;33mod objects;34pub use objects::*;35mod manifest;36pub use manifest::*;37mod parse;38pub use parse::*;39mod strings;40pub use strings::*;41mod misc;42pub use misc::*;4344pub fn stdlib_uncached(settings: Rc<RefCell<Settings>>) -> ObjValue {45	let mut builder = ObjValueBuilder::new();4647	let expr = expr::stdlib_expr();48	let eval = jrsonnet_evaluator::evaluate(ContextBuilder::dangerous_empty_state().build(), &expr)49		.expect("stdlib.jsonnet should have no errors")50		.as_obj()51		.expect("stdlib.jsonnet should evaluate to object");5253	builder.with_super(eval);5455	for (name, builtin) in [56		// Types57		("type", builtin_type::INST),58		("isString", builtin_is_string::INST),59		("isNumber", builtin_is_number::INST),60		("isBoolean", builtin_is_boolean::INST),61		("isObject", builtin_is_object::INST),62		("isArray", builtin_is_array::INST),63		("isFunction", builtin_is_function::INST),64		// Arrays65		("makeArray", builtin_make_array::INST),66		("slice", builtin_slice::INST),67		("map", builtin_map::INST),68		("flatMap", builtin_flatmap::INST),69		("filter", builtin_filter::INST),70		("foldl", builtin_foldl::INST),71		("foldr", builtin_foldr::INST),72		("range", builtin_range::INST),73		("join", builtin_join::INST),74		("reverse", builtin_reverse::INST),75		("any", builtin_any::INST),76		("all", builtin_all::INST),77		("member", builtin_member::INST),78		("count", builtin_count::INST),79		// Math80		("abs", builtin_abs::INST),81		("sign", builtin_sign::INST),82		("max", builtin_max::INST),83		("min", builtin_min::INST),84		("modulo", builtin_modulo::INST),85		("floor", builtin_floor::INST),86		("ceil", builtin_ceil::INST),87		("log", builtin_log::INST),88		("pow", builtin_pow::INST),89		("sqrt", builtin_sqrt::INST),90		("sin", builtin_sin::INST),91		("cos", builtin_cos::INST),92		("tan", builtin_tan::INST),93		("asin", builtin_asin::INST),94		("acos", builtin_acos::INST),95		("atan", builtin_atan::INST),96		("exp", builtin_exp::INST),97		("mantissa", builtin_mantissa::INST),98		("exponent", builtin_exponent::INST),99		// Operator100		("mod", builtin_mod::INST),101		("primitiveEquals", builtin_primitive_equals::INST),102		("equals", builtin_equals::INST),103		("format", builtin_format::INST),104		// Sort105		("sort", builtin_sort::INST),106		// Hash107		("md5", builtin_md5::INST),108		#[cfg(feature = "exp-more-hashes")]109		("sha256", builtin_sha256::INST),110		// Encoding111		("encodeUTF8", builtin_encode_utf8::INST),112		("decodeUTF8", builtin_decode_utf8::INST),113		("base64", builtin_base64::INST),114		("base64Decode", builtin_base64_decode::INST),115		("base64DecodeBytes", builtin_base64_decode_bytes::INST),116		// Objects117		("objectFieldsEx", builtin_object_fields_ex::INST),118		("objectHasEx", builtin_object_has_ex::INST),119		// Manifest120		("escapeStringJson", builtin_escape_string_json::INST),121		("manifestJsonEx", builtin_manifest_json_ex::INST),122		("manifestYamlDoc", builtin_manifest_yaml_doc::INST),123		// Parsing124		("parseJson", builtin_parse_json::INST),125		("parseYaml", builtin_parse_yaml::INST),126		// Strings127		("codepoint", builtin_codepoint::INST),128		("substr", builtin_substr::INST),129		("char", builtin_char::INST),130		("strReplace", builtin_str_replace::INST),131		("splitLimit", builtin_splitlimit::INST),132		("asciiUpper", builtin_ascii_upper::INST),133		("asciiLower", builtin_ascii_lower::INST),134		("findSubstr", builtin_find_substr::INST),135		("parseInt", builtin_parse_int::INST),136		("parseOctal", builtin_parse_octal::INST),137		("parseHex", builtin_parse_hex::INST),138		// Misc139		("length", builtin_length::INST),140		("startsWith", builtin_starts_with::INST),141		("endsWith", builtin_ends_with::INST),142	]143	.iter()144	.cloned()145	{146		builder147			.member(name.into())148			.hide()149			.value(Val::Func(FuncVal::StaticBuiltin(builtin)))150			.expect("no conflict");151	}152153	builder154		.member("extVar".into())155		.hide()156		.value(Val::Func(FuncVal::Builtin(Cc::new(tb!(builtin_ext_var {157			settings: settings.clone()158		})))))159		.expect("no conflict");160	builder161		.member("native".into())162		.hide()163		.value(Val::Func(FuncVal::Builtin(Cc::new(tb!(builtin_native {164			settings: settings.clone()165		})))))166		.expect("no conflict");167	builder168		.member("trace".into())169		.hide()170		.value(Val::Func(FuncVal::Builtin(Cc::new(tb!(builtin_trace {171			settings172		})))))173		.expect("no conflict");174175	builder176		.member("id".into())177		.hide()178		.value(Val::Func(FuncVal::Id))179		.expect("no conflict");180181	builder.build()182}183184pub trait TracePrinter {185	fn print_trace(&self, loc: CallLocation, value: IStr);186}187188pub struct StdTracePrinter {189	resolver: PathResolver,190}191impl StdTracePrinter {192	pub fn new(resolver: PathResolver) -> Self {193		Self { resolver }194	}195}196impl TracePrinter for StdTracePrinter {197	fn print_trace(&self, loc: CallLocation, value: IStr) {198		eprint!("TRACE:");199		if let Some(loc) = loc.0 {200			let locs = loc.0.map_source_locations(&[loc.1]);201			eprint!(202				" {}:{}",203				match loc.0.source_path().path() {204					Some(p) => self.resolver.resolve(p),205					None => loc.0.source_path().to_string(),206				},207				locs[0].line208			);209		}210		eprintln!(" {}", value);211	}212}213214pub struct Settings {215	/// Used for `std.extVar`216	pub ext_vars: HashMap<IStr, TlaArg>,217	/// Used for `std.native`218	pub ext_natives: HashMap<IStr, Cc<TraceBox<dyn Builtin>>>,219	/// Helper to add globals without implementing custom ContextInitializer220	pub globals: GcHashMap<IStr, Thunk<Val>>,221	/// Used for `std.trace`222	pub trace_printer: Box<dyn TracePrinter>,223	/// Used for `std.thisFile`224	pub path_resolver: PathResolver,225}226227fn extvar_source(name: &str, code: impl Into<IStr>) -> Source {228	let source_name = format!("<extvar:{}>", name);229	Source::new_virtual(source_name.into(), code.into())230}231232#[derive(Trace)]233pub struct ContextInitializer {234	// When we don't need to support legacy-this-file, we can reuse same context for all files235	#[cfg(not(feature = "legacy-this-file"))]236	context: Context,237	// Otherwise, we can only keep first stdlib layer, and then stack thisFile on top of it238	#[cfg(feature = "legacy-this-file")]239	stdlib_obj: ObjValue,240	settings: Rc<RefCell<Settings>>,241}242impl ContextInitializer {243	pub fn new(s: State, resolver: PathResolver) -> Self {244		let settings = Settings {245			ext_vars: Default::default(),246			ext_natives: Default::default(),247			globals: Default::default(),248			trace_printer: Box::new(StdTracePrinter::new(resolver.clone())),249			path_resolver: resolver,250		};251		let settings = Rc::new(RefCell::new(settings));252		Self {253			#[cfg(not(feature = "legacy-this-file"))]254			context: {255				let mut context = ContextBuilder::with_capacity(s, 1);256				context.bind(257					"std".into(),258					Thunk::evaluated(Val::Obj(stdlib_uncached(settings.clone()))),259				);260				context.build()261			},262			#[cfg(feature = "legacy-this-file")]263			stdlib_obj: stdlib_uncached(settings.clone()),264			settings,265		}266	}267	pub fn settings(&self) -> Ref<Settings> {268		self.settings.borrow()269	}270	pub fn settings_mut(&self) -> RefMut<Settings> {271		self.settings.borrow_mut()272	}273	pub fn add_ext_var(&self, name: IStr, value: Val) {274		self.settings_mut()275			.ext_vars276			.insert(name, TlaArg::Val(value));277	}278	pub fn add_ext_str(&self, name: IStr, value: IStr) {279		self.settings_mut()280			.ext_vars281			.insert(name, TlaArg::String(value));282	}283	pub fn add_ext_code(&self, name: &str, code: impl Into<IStr>) -> Result<()> {284		let code = code.into();285		let source = extvar_source(name, code.clone());286		let parsed = jrsonnet_parser::parse(287			&code,288			&jrsonnet_parser::ParserSettings {289				source: source.clone(),290			},291		)292		.map_err(|e| ImportSyntaxError {293			path: source,294			error: Box::new(e),295		})?;296		// self.data_mut().volatile_files.insert(source_name, code);297		self.settings_mut()298			.ext_vars299			.insert(name.into(), TlaArg::Code(parsed));300		Ok(())301	}302	pub fn add_native(&self, name: IStr, cb: Cc<TraceBox<dyn Builtin>>) {303		self.settings_mut().ext_natives.insert(name, cb);304	}305}306impl jrsonnet_evaluator::ContextInitializer for ContextInitializer {307	#[cfg(not(feature = "legacy-this-file"))]308	fn initialize(&self, _s: State, _source: Source) -> jrsonnet_evaluator::Context {309		let out = self.context.clone();310		let globals = &self.settings().globals;311		if globals.is_empty() {312			return out;313		}314315		let mut out = ContextBuilder::extend(out);316		for (k, v) in globals.iter() {317			out.bind(k.clone(), v.clone());318		}319		out.build()320	}321	#[cfg(feature = "legacy-this-file")]322	fn initialize(&self, s: State, source: Source) -> Context {323		use jrsonnet_evaluator::val::StrValue;324325		let mut builder = ObjValueBuilder::new();326		builder.with_super(self.stdlib_obj.clone());327		builder328			.member("thisFile".into())329			.hide()330			.value(Val::Str(StrValue::Flat(331				match source.source_path().path() {332					Some(p) => self.settings().path_resolver.resolve(p).into(),333					None => source.source_path().to_string().into(),334				},335			)))336			.expect("this object builder is empty");337		let stdlib_with_this_file = builder.build();338339		let mut context = ContextBuilder::with_capacity(s, 1);340		context.bind(341			"std".into(),342			Thunk::evaluated(Val::Obj(stdlib_with_this_file)),343		);344		for (k, v) in self.settings().globals.iter() {345			context.bind(k.clone(), v.clone());346		}347		context.build()348	}349	fn as_any(&self) -> &dyn std::any::Any {350		self351	}352}353354pub trait StateExt {355	/// This method was previously implemented in jrsonnet-evaluator itself356	fn with_stdlib(&self);357	fn add_global(&self, name: IStr, value: Thunk<Val>);358}359360impl StateExt for State {361	fn with_stdlib(&self) {362		let initializer = ContextInitializer::new(self.clone(), PathResolver::new_cwd_fallback());363		self.settings_mut().context_initializer = tb!(initializer)364	}365	fn add_global(&self, name: IStr, value: Thunk<Val>) {366		self.settings()367			.context_initializer368			.as_any()369			.downcast_ref::<ContextInitializer>()370			.expect("not standard context initializer")371			.settings_mut()372			.globals373			.insert(name, value);374	}375}
modifiedcrates/jrsonnet-stdlib/src/std.jsonnetdiffbeforeafterboth
--- a/crates/jrsonnet-stdlib/src/std.jsonnet
+++ b/crates/jrsonnet-stdlib/src/std.jsonnet
@@ -27,13 +27,6 @@
 
   split(str, c):: std.splitLimit(str, c, -1),
 
-  repeat(what, count)::
-    local joiner =
-      if std.isString(what) then ''
-      else if std.isArray(what) then []
-      else error 'std.repeat first argument must be an array or a string';
-    std.join(joiner, std.makeArray(count, function(i) what)),
-
   mapWithIndex(func, arr)::
     if !std.isFunction(func) then
       error ('std.mapWithIndex first param must be function, got ' + std.type(func))
addednix/jrsonnet-release.nixdiffbeforeafterboth
--- /dev/null
+++ b/nix/jrsonnet-release.nix
@@ -0,0 +1,24 @@
+{ lib, fetchFromGitHub, rustPlatform, runCommand, makeWrapper }:
+
+
+rustPlatform.buildRustPackage rec {
+  pname = "jrsonnet";
+  version = "5f0f8de9f52f961e2ff162e0a3fd4ca20a275f1d";
+
+  src = fetchFromGitHub {
+    owner = "CertainLach";
+    repo = pname;
+    rev = version;
+    hash = lib.fakeHash;
+  };
+
+  cargoTestFlags = [ "--package=jrsonnet --features=mimalloc,legacy-this-file" ];
+  cargoBuildFlags = [ "--package=jrsonnet --features=mimalloc,legacy-this-file" ];
+
+  buildInputs = [ makeWrapper ];
+
+  postInstall = ''
+    mv $out/bin/jrsonnet $out/bin/jrsonnet-release
+    wrapProgram $out/bin/jrsonnet-release --add-flags "--max-stack=200000 --os-stack=200000"
+  '';
+}