Add serialization to JSON/protobuf to CLI

cedar-policy-cli/Cargo.toml

@@ -13,19 +13,26 @@ repository.workspace = true
 [dependencies]
 cedar-policy = { version = "=4.1.0", path = "../cedar-policy" }
 cedar-policy-formatter = { version = "=4.1.0", path = "../cedar-policy-formatter" }
+cedar-policy-core = { package= "cedar-policy-core", git = "https://github.com/cedar-policy/cedar.git", branch = "main", version = "4.1"}
+cedar-policy-validator = { package= "cedar-policy-validator", git = "https://github.com/cedar-policy/cedar.git", branch = "main", version = "4.1"}
 clap = { version = "4", features = ["derive", "env"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 miette = { version = "7.1.0", features = ["fancy"] }
 thiserror = "2.0"
 semver = "1.0.23"
+prost = "0.13"
+
+[build-dependencies]
+prost-build = "0.13"
 
 [features]
 default = []
 experimental = ["permissive-validate", "partial-validate", "partial-eval"]
 permissive-validate = ["cedar-policy/permissive-validate"]
 partial-validate = ["cedar-policy/partial-validate"]
 partial-eval = ["cedar-policy/partial-eval"]
+protobufs = ["cedar-policy/protobufs", "cedar-policy-core/protobufs", "cedar-policy-validator/protobufs"]
 
 [dev-dependencies]
 assert_cmd = "2.0"

cedar-policy-cli/build.rs

@@ -0,0 +1,25 @@
+fn main() {
+    generate_schemas();
+}
+
+/// Reads protobuf schema files (.proto) and generates Rust modules
+fn generate_schemas() {
+    let mut config = prost_build::Config::new();
+    config.extern_path(".cedar_policy_core", "crate::cedar_policy_core::ast::proto");
+    config.extern_path(
+        ".cedar_policy_validator",
+        "crate::cedar_policy_validator::proto",
+    );
+    // PANIC SAFETY: compile-time unwrap
+    #[allow(clippy::unwrap_used)]
+    config
+        .compile_protos(
+            &["protobuf_schema/CLI.proto"],
+            &[
+                "protobuf_schema",
+                "../cedar-policy-core/protobuf_schema",
+                "../cedar-policy-validator/protobuf_schema",
+            ],
+        )
+        .unwrap();
+}

cedar-policy-cli/protobuf_schema/CLI.proto

@@ -0,0 +1,35 @@
+//
+// Copyright Cedar Contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+syntax = "proto3";
+package amzn_cedar_internal_cli;
+
+import "AST.proto";
+import "Validator.proto";
+
+message ValidationRequestMsg {
+    cedar_policy_validator.ValidatorSchema schema = 1;
+    cedar_policy_core.LiteralPolicySet policies = 2;
+    cedar_policy_validator.ValidationMode mode = 3;
+}
+
+message EquivRequestMsg {
+    cedar_policy_validator.ValidatorSchema schema = 1;
+    cedar_policy_core.LiteralPolicySet old_policies = 2;
+    cedar_policy_core.LiteralPolicySet new_policies = 3;
+}
+
+