Adjust module organization to facilitate resurrection of the playground.

The playground doesn't / cannot depend on aiken-project because that becomes a gigantic pain. So instead, we try to keep essential stuff inside aiken-lang when possible.

crates/aiken-lang/src/lib.rs

@@ -14,7 +14,10 @@ pub mod line_numbers;
 pub mod parser;
 pub mod plutus_version;
 pub mod pretty;
+pub mod test_framework;
 pub mod tipo;
+pub mod utils;
+pub mod version;
 
 #[derive(Debug, Default, Clone)]
 pub struct IdGenerator {

crates/aiken-lang/src/utils/indexmap.rs

@@ -0,0 +1,21 @@
+use indexmap::IndexMap;
+use std::{collections::HashMap, hash::Hash};
+
+pub fn as_ref_values<'a, K, V>(iter: &'a IndexMap<K, V>) -> IndexMap<&'a K, &'a V>
+where
+    K: Eq + Hash + Clone + 'a,
+{
+    let mut refs = IndexMap::new();
+    for (k, v) in iter {
+        refs.insert(k, v);
+    }
+    refs
+}
+
+pub fn as_str_ref_values<V>(iter: &'_ HashMap<String, V>) -> IndexMap<&'_ str, &'_ V> {
+    let mut refs = IndexMap::new();
+    for (k, v) in iter {
+        refs.insert(k.as_str(), v);
+    }
+    refs
+}

crates/aiken-lang/src/utils/mod.rs

@@ -0,0 +1 @@
+pub mod indexmap;

crates/aiken-lang/src/version.rs

@@ -0,0 +1,15 @@
+pub fn compiler_version(include_commit_hash: bool) -> String {
+    if include_commit_hash {
+        format!(
+            "v{}+{}",
+            built_info::PKG_VERSION,
+            built_info::GIT_COMMIT_HASH_SHORT.unwrap_or("unknown")
+        )
+    } else {
+        format!("v{}", built_info::PKG_VERSION,)
+    }
+}
+
+mod built_info {
+    include!(concat!(env!("OUT_DIR"), "/built.rs"));
+}