feat: Update to OPA v1.2.0 (#373)

Regorus now defaults to rego v1. `import rego.v1` is no longer needed.
Additionally, `future` keywords are automatically imported.

See
https://www.openpolicyagent.org/docs/latest/v0-upgrade/#changes-to-rego-in-opa-v10
to understand the differences between rego v1 and v0.

BREAKING CHANGE:

v0 style policies will error out by default. To enable v0 behavior, call engine.set_rego_v0(true) before
loading policies.

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

bindings/python/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "regoruspy"
-version = "0.2.2"
+version = "0.3.0"
 edition = "2021"
 repository = "https://github.com/microsoft/regorus/bindings/python"
 description = "Python bindings for Regorus - a fast, lightweight Rego interpreter written in Rust"

bindings/python/src/lib.rs

@@ -168,6 +168,15 @@ impl Engine {
         }
     }
 
+    /// Turn on rego v0.
+    ///
+    /// Regorus now defaults to v1.
+    ///
+    /// * `enable`: Whether to enable/disable v0.
+    pub fn set_rego_v0(&mut self, enable: bool) {
+        self.engine.set_rego_v0(enable)
+    }
+
     /// Add a policy
     ///
     /// The policy is parsed into AST.

bindings/python/test.py

@@ -6,6 +6,8 @@ import regorus
 # Create engine
 engine = regorus.Engine()
 
+engine.set_rego_v0(True)
+
 # Load policies
 pkg = engine.add_policy_from_file('../../tests/aci/framework.rego')
 print(' Loaded package %s' % pkg)