Bump rsjsonnet-lang from 0.1.1 to 0.3.0 (#14)

* Bump rsjsonnet-lang from 0.1.1 to 0.3.0

Bumps [rsjsonnet-lang](https://github.com/eduardosm/rsjsonnet) from 0.1.1 to 0.3.0.
- [Release notes](https://github.com/eduardosm/rsjsonnet/releases)
- [Changelog](https://github.com/eduardosm/rsjsonnet/blob/main/CHANGELOG.md)
- [Commits](eduardosm/rsjsonnet@v0.1.1...v0.3.0)

---
updated-dependencies:
- dependency-name: rsjsonnet-lang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

* Update front to 0.3.0 too

* Migration

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Shia <[email protected]>

Cargo.toml

@@ -12,8 +12,8 @@ text_io = "0.1"
 aws-config = { version = "1", features = ["behavior-version-latest"] }
 aws-sdk-scheduler = { version = "1", features = ["behavior-version-latest"] }
 aws-sdk-sfn = { version = "1", features = ["behavior-version-latest"] }
-rsjsonnet-front = "0.1"
-rsjsonnet-lang = "0.1"
+rsjsonnet-front = "0.3"
+rsjsonnet-lang = "0.3"
 similar = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1.0"

src/jsonnet_evaluator.rs

@@ -1,26 +1,36 @@
-use std::path::Path;
+use std::{collections::HashSet, path::Path};
 
 use serde_json::Value;
 
 use crate::cli::StrKeyVal;
 
+use rsjsonnet_front::Session;
 use rsjsonnet_lang::program::Value as JsonnetValue;
 
 pub fn eval(file_path: &str, ext_str: &[StrKeyVal]) -> Result<Value, String> {
     let source_path = Path::new(file_path);
 
-    let mut session = rsjsonnet_front::Session::new();
+    let arena = rsjsonnet_lang::arena::Arena::new();
+    let mut session = Session::new(&arena);
 
-    ext_str.iter().for_each(|ext_str| {
-        let key = session.program().str_interner().intern(&ext_str.var);
-        let val = if let Some(val) = &ext_str.val {
+    let mut ext_names = HashSet::new();
+
+    for arg in ext_str.iter() {
+        let key = session.program().intern_str(&arg.var);
+        if !ext_names.insert(key) {
+            let err_msg = format!("External variable {:?} defined more than once", arg.var);
+            return Err(err_msg);
+        }
+
+        let val = if let Some(val) = &arg.val {
             JsonnetValue::string(val.as_ref())
         } else {
             JsonnetValue::null()
         };
-        let value_thunk = session.program_mut().value_to_thunk(&val);
-        session.program_mut().add_ext_var(key, &value_thunk);
-    });
+
+        let thunk = session.program_mut().value_to_thunk(&val);
+        session.program_mut().add_ext_var(key, &thunk);
+    }
 
     let Some(thunk) = session.load_real_file(source_path) else {
         return Err("Failed to load file".to_string());