From 1125eb6d1bf4d07213087c0ade68c15f471d3654 Mon Sep 17 00:00:00 2001
From: Zhaofeng Li <hello@zhaofeng.li>
Date: Tue, 29 Dec 2020 12:10:00 -0800
Subject: [PATCH] nix: Suppress GC warnings

The derivations and built closures are intentionally not added as GC
roots. Maybe we can provide an option for those who want GC roots
to be created.
---
 src/nix/host.rs | 3 ++-
 src/nix/mod.rs  | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/nix/host.rs b/src/nix/host.rs
index fb9cfde..f86d0d7 100644
--- a/src/nix/host.rs
+++ b/src/nix/host.rs
@@ -76,6 +76,7 @@ impl Host for Local {
     }
     async fn realize_remote(&mut self, derivation: &StorePath) -> NixResult<Vec<StorePath>> {
         Command::new("nix-store")
+            .arg("--no-gc-warning")
             .arg("--realise")
             .arg(derivation.as_path())
             .capture_output()
@@ -125,7 +126,7 @@ impl Host for SSH {
     }
     async fn realize_remote(&mut self, derivation: &StorePath) -> NixResult<Vec<StorePath>> {
         // FIXME
-        self.ssh(&["nix-store", "--realise", derivation.as_path().to_str().unwrap()])
+        self.ssh(&["nix-store", "--no-gc-warning", "--realise", derivation.as_path().to_str().unwrap()])
             .capture_output()
             .await
             .map(|paths| {
diff --git a/src/nix/mod.rs b/src/nix/mod.rs
index 927ebea..e6df34a 100644
--- a/src/nix/mod.rs
+++ b/src/nix/mod.rs
@@ -235,6 +235,7 @@ impl<'hive> NixInstantiate<'hive> {
 
         let mut command = Command::new("nix-instantiate");
         command
+            .arg("--no-gc-warning")
             .arg("-E")
             .arg(format!(
                 "with builtins; let eval = import {}; hive = eval {{ rawHive = import {}; }}; in {}",