fix(GH-160): serialized-stdlib feature

crates/jrsonnet-stdlib/Cargo.toml

@@ -12,9 +12,13 @@ workspace = true
 
 [features]
 default = ["codegenerated-stdlib"]
-# Speed-up initialization by generating code for parsed stdlib, instead
-# of invoking parser for it
+# Speed-up initialization by generating code for parsed stdlib,
+# instead of invoking parser for it.
+# This is mutually exclusive with `serialized-stdlib`.
 codegenerated-stdlib = ["jrsonnet-parser/structdump"]
+# Use the embedded serialized stdlib.
+# This is mutually exclusive with `codegenerated-stdlib`.
+serialized-stdlib = []
 # Enables legacy `std.thisFile` support, at the cost of worse caching
 legacy-this-file = []
 # Add order preservation flag to some functions

crates/jrsonnet-stdlib/src/expr.rs

@@ -1,7 +1,11 @@
 use jrsonnet_parser::LocExpr;
 
 pub fn stdlib_expr() -> LocExpr {
-	#[cfg(feature = "serialized-stdlib")]
+	#[cfg(all(feature = "serialized-stdlib", feature = "codegenerated-stdlib"))]
+	compile_error!(
+		"features `serialized-stdlib` and `codegenerated-stdlib` are mutually exclusive"
+	);
+	#[cfg(all(feature = "serialized-stdlib", not(feature = "codegenerated-stdlib")))]
 	{
 		use bincode::{BincodeRead, DefaultOptions, Options};
 		use serde::{Deserialize, Deserializer};
@@ -77,7 +81,7 @@ pub fn stdlib_expr() -> LocExpr {
 		LocExpr::deserialize(&mut deserializer).unwrap()
 	}
 
-	#[cfg(feature = "codegenerated-stdlib")]
+	#[cfg(all(feature = "codegenerated-stdlib", not(feature = "serialized-stdlib")))]
 	{
 		mod structdump_import {
 			pub(super) use std::{option::Option, rc::Rc, vec};
@@ -88,7 +92,7 @@ pub fn stdlib_expr() -> LocExpr {
 		include!(concat!(env!("OUT_DIR"), "/stdlib.rs"))
 	}
 
-	#[cfg(not(feature = "codegenerated-stdlib"))]
+	#[cfg(not(any(feature = "serialized-stdlib", feature = "codegenerated-stdlib")))]
 	{
 		use jrsonnet_parser::Source;