Determine runtime dir based on executable location or env override.

helix-core/src/lib.rs

@@ -44,6 +44,18 @@ pub(crate) fn find_first_non_whitespace_char(text: RopeSlice, line_num: usize) -
     None
 }
 
+pub fn runtime_dir() -> std::path::PathBuf {
+    // runtime env var || dir where binary is located
+    std::env::var("HELIX_RUNTIME")
+        .map(|path| path.into())
+        .unwrap_or_else(|_| {
+            std::env::current_exe()
+                .ok()
+                .and_then(|path| path.parent().map(|path| path.to_path_buf()))
+                .unwrap()
+        })
+}
+
 pub fn config_dir() -> std::path::PathBuf {
     // TODO: allow env var override
     let xdg_dirs =

helix-core/src/syntax.rs

@@ -63,7 +63,8 @@ fn read_query(language: &str, filename: &str) -> String {
     static INHERITS_REGEX: Lazy<Regex> =
         Lazy::new(|| Regex::new(r";+\s*inherits\s*:?\s*([a-z_,()]+)\s*").unwrap());
 
-    let root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let root = crate::runtime_dir();
+    // let root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
 
     let path = root
         .join("../runtime/queries")

shell.nix

@@ -11,5 +11,7 @@ pkgs.mkShell {
   RUST_BACKTRACE = "1";
   # https://github.com/rust-lang/rust/issues/55979
   LD_LIBRARY_PATH="${stdenv.cc.cc.lib}/lib64:$LD_LIBRARY_PATH";
+
+  HELIX_RUNTIME=./runtime;
 }