feat(spdx): add mozart-spdx-licenses crate for SPDX license validation

Add new workspace crate that validates SPDX license expressions using
data from composer/spdx-licenses (git submodule). Includes build.rs
codegen from JSON, recursive descent expression parser supporting
AND/OR/WITH/LicenseRef, and integrates into mozart-core's
validate_license function.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/crates/mozart-spdx-licenses/build.rs b/crates/mozart-spdx-licenses/build.rs
new file mode 100644
index 0000000..27d4ed6
--- /dev/null
+++ b/crates/mozart-spdx-licenses/build.rs
@@ -0,0 +1,54 @@
+use serde_json::Value;
+use std::collections::BTreeMap;
+use std::env;
+use std::fs;
+use std::path::Path;
+
+fn main() {
+    let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let res_dir = Path::new(&manifest_dir).join("composer-spdx-licenses/res");
+
+    let licenses_path = res_dir.join("spdx-licenses.json");
+    let exceptions_path = res_dir.join("spdx-exceptions.json");
+
+    println!("cargo:rerun-if-changed={}", licenses_path.display());
+    println!("cargo:rerun-if-changed={}", exceptions_path.display());
+
+    let licenses_json: BTreeMap<String, Value> =
+        serde_json::from_str(&fs::read_to_string(&licenses_path).unwrap()).unwrap();
+
+    let exceptions_json: BTreeMap<String, Value> =
+        serde_json::from_str(&fs::read_to_string(&exceptions_path).unwrap()).unwrap();
+
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let out_path = Path::new(&out_dir).join("spdx_data.rs");
+
+    let mut code = String::new();
+
+    // Generate licenses array
+    code.push_str("const LICENSES: &[(&str, &str, &str, bool, bool)] = &[\n");
+    for (id, val) in &licenses_json {
+        let arr = val.as_array().unwrap();
+        let full_name = arr[0].as_str().unwrap();
+        let osi_approved = arr[1].as_bool().unwrap();
+        let deprecated = arr[2].as_bool().unwrap();
+        let lower = id.to_lowercase();
+        code.push_str(&format!(
+            "    ({:?}, {:?}, {:?}, {}, {}),\n",
+            lower, id, full_name, osi_approved, deprecated
+        ));
+    }
+    code.push_str("];\n\n");
+
+    // Generate exceptions array
+    code.push_str("const EXCEPTIONS: &[(&str, &str, &str)] = &[\n");
+    for (id, val) in &exceptions_json {
+        let arr = val.as_array().unwrap();
+        let full_name = arr[0].as_str().unwrap();
+        let lower = id.to_lowercase();
+        code.push_str(&format!("    ({:?}, {:?}, {:?}),\n", lower, id, full_name));
+    }
+    code.push_str("];\n");
+
+    fs::write(out_path, code).unwrap();
+}