feat: Add configurable functions path via SUPABASE_FUNCTIONS_PATH environment variable

README.md

@@ -32,6 +32,14 @@ The edge runtime can be divided into two runtimes with different purposes.
   - Limits are required to be set such as: Memory and Timeouts.
   - Has access to environment variables explictly allowed by the main runtime.
 
+## Configuration
+
+### Environment Variables
+
+- `SUPABASE_FUNCTIONS_PATH` - Custom path for function compilation directory. 
+  - Default: `/var/tmp/sb-compile-<executable-name>` on Unix/Linux, `%TEMP%\sb-compile-<executable-name>` on Windows
+  - Example: `SUPABASE_FUNCTIONS_PATH=/home/deno/functions` (useful for Kubernetes deployments)
+
 ## Developers
 
 To learn how to build / test Edge Runtime, visit [DEVELOPERS.md](DEVELOPERS.md)

crates/deno_facade/module_loader/standalone.rs

@@ -579,12 +579,18 @@ pub async fn create_module_loader_for_eszip(
   .transpose()?
   .unwrap_or_default();
 
-  let root_path = if cfg!(target_family = "unix") {
-    PathBuf::from("/var/tmp")
-  } else {
-    std::env::temp_dir()
-  }
-  .join(format!("sb-compile-{}", current_exe_name));
+  let root_path = match std::env::var("SUPABASE_FUNCTIONS_PATH") {
+    Ok(custom_path) => PathBuf::from(custom_path),
+    Err(_) => {
+      // Default behavior: use platform-specific temp directory
+      if cfg!(target_family = "unix") {
+        PathBuf::from("/var/tmp")
+      } else {
+        std::env::temp_dir()
+      }
+      .join(format!("sb-compile-{}", current_exe_name))
+    }
+  };
 
   let node_modules = metadata.node_modules()?;
   let root_dir_url =