chore: move lint registry to OUT_DIR

Update registry generation to write to cargo's OUT_DIR and
include it via env! instead of a static project-relative path.

3 files changed, 9 insertions, 6 deletions

diff --git a/mingling_cli/.gitignore b/mingling_cli/.gitignore
index 6a6d575..8b13789 100644
--- a/mingling_cli/.gitignore
+++ b/mingling_cli/.gitignore
@@ -1 +1 @@
-registry.json
+
diff --git a/mingling_cli/pre/lint_registry.rs b/mingling_cli/pre/lint_registry.rs
index e69592b..5bfd3fe 100644
--- a/mingling_cli/pre/lint_registry.rs
+++ b/mingling_cli/pre/lint_registry.rs
@@ -1,4 +1,4 @@
-use std::{fs, io::Error};
+use std::{fs, io::Error, path::Path};
 
 use just_template::{Template, tmpl};
 
@@ -67,7 +67,8 @@ pub fn gen_mod_file() -> Result<(), Error> {
 /// Generate lint metadata registry
 ///
 /// Parses each `.rs` file in `src/lints/` (excluding mod.rs and _init.rs),
-/// extracts doc-comment metadata, and writes the result as JSON.
+/// extracts doc-comment metadata, and writes the result as `registry.json`
+/// in the cargo `OUT_DIR`.
 pub fn gen_lint_registry() -> Result<(), Error> {
     let root = std::env::current_dir()?;
     let lints_dir = root.join("src").join("lints");
@@ -102,7 +103,8 @@ pub fn gen_lint_registry() -> Result<(), Error> {
     });
 
     let json = serde_json::json!({ "lints": lints });
-    let out_path = root.join("registry.json");
+    let out_dir = std::env::var("OUT_DIR").expect("OUT_DIR is not set");
+    let out_path = Path::new(&out_dir).join("registry.json");
     fs::write(&out_path, serde_json::to_string_pretty(&json).unwrap())?;
     Ok(())
 }
diff --git a/mingling_cli/src/linter/registry.rs b/mingling_cli/src/linter/registry.rs
index 79f3225..b9f82fa 100644
--- a/mingling_cli/src/linter/registry.rs
+++ b/mingling_cli/src/linter/registry.rs
@@ -26,8 +26,9 @@ pub struct LintMetadata {
 #[program_setup]
 pub fn lint_registry_setup(p: &mut Program<ThisProgram>) {
     p.with_resource(ResLintRegistry::lazy_init(|| {
-        let registry: ResLintRegistry = serde_json::from_str(include_str!("../../registry.json"))
-            .expect("failed to parse embedded registry.json");
+        let registry: ResLintRegistry =
+            serde_json::from_str(include_str!(concat!(env!("OUT_DIR"), "/registry.json")))
+                .expect("failed to parse embedded registry.json");
         registry
     }));
 }